CN115465044A - Hybrid vehicle thermal management system, control method and hybrid vehicle - Google Patents

Abstract

The invention relates to the technical field of hybrid vehicle thermal management, in particular to a hybrid vehicle thermal management system, a control method and a hybrid vehicle, wherein the hybrid vehicle thermal management system comprises: the high-temperature heat dissipation system comprises an engine, a thermostat, a high-temperature radiator and a first water pump which are connected through a high-temperature heat dissipation pipeline; the low-temperature heat dissipation system comprises a low-temperature heat radiator, a second water pump and a motor which are connected through a low-temperature heat dissipation pipeline, wherein the low-temperature heat radiator is arranged on one side of the high-temperature heat radiator; the air conditioning system comprises an air conditioning refrigeration loop, wherein the air conditioning refrigeration loop comprises a compressor, a condenser, a first stop valve, a thermostatic expansion valve and an evaporator which are connected through an air conditioning refrigeration pipeline, and the condenser is arranged on one side of the high-temperature radiator and is positioned on the same side as the low-temperature radiator; the electronic fan system comprises a plurality of electronic fan sets which are distributed side by side and can be selectively opened, and the electronic fan sets are arranged opposite to the condenser, the high-temperature radiator and the low-temperature radiator. The thermal management system is compact in arrangement and low in cost.

Description

Hybrid vehicle thermal management system, control method and hybrid vehicle

Technical Field

The invention relates to the technical field of hybrid vehicle thermal management, in particular to a hybrid vehicle thermal management system, a control method and a hybrid vehicle.

Background

The Hybrid Vehicle is a Hybrid Vehicle (Hybrid Vehicle) for short, and comprises two sets of power systems of an engine and a motor, and three different running modes of pure electric, hybrid and fuel are embodied along with different power modes.

As the power system of the hybrid vehicle is increased compared with the traditional fuel vehicle, the complexity of the thermal management system of the hybrid vehicle is increased, and the power battery, the motor, high-voltage accessories and the like need to be designed separately to ensure the normal operation. The existing thermal management system mainly comprises a high-temperature water heat dissipation system, a low-temperature water heat dissipation system, an air conditioning system and a battery thermal management system, wherein the high-temperature water heat dissipation system is used for cooling an engine, the low-temperature water heat dissipation system is used for cooling a motor, a motor controller and a condenser in the air conditioning system, the air conditioning system is used for heating or cooling a cab to improve comfort, and the battery thermal management system is used for heating or cooling a power battery.

In the existing thermal management system, each module is provided with an independent thermal management system to ensure the normal operation of each structure, so that the arrangement of each thermal management system is dispersed, the complexity of the system is increased, and meanwhile, the arrangement number and the energy consumption of cooling fans in the system are correspondingly increased and the actual cruising ability of a power battery is reduced due to the increase of the complexity of the thermal management system.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects of complexity and high energy consumption of a hybrid vehicle thermal management system in the prior art, so that the hybrid vehicle thermal management system, the control method and the hybrid vehicle with a simplified structure and low energy consumption are provided.

In order to solve the above problems, the present invention provides a hybrid vehicle thermal management system, comprising: the high-temperature heat dissipation system comprises an engine, a thermostat, a high-temperature radiator and a first water pump, wherein the engine, the thermostat, the high-temperature radiator and the first water pump are connected through a high-temperature heat dissipation pipeline to form a closed loop; the low-temperature heat dissipation system comprises a low-temperature heat radiator, a second water pump and a motor, wherein the low-temperature heat radiator, the second water pump and the motor are connected through a low-temperature heat dissipation pipeline to form a closed loop; the air conditioning system comprises an air conditioning refrigeration loop, wherein the air conditioning refrigeration loop comprises a compressor, a condenser, a first stop valve, a thermostatic expansion valve and an evaporator which are connected through an air conditioning refrigeration pipeline to form a closed loop, and the condenser is arranged on one side of the high-temperature radiator and is positioned on the same side as the low-temperature radiator; the electronic fan system comprises a plurality of electronic fan sets which are distributed side by side and can be selectively started, wherein the electronic fan sets are arranged opposite to the condenser, the high-temperature radiator and the low-temperature radiator.

Optionally, the number of the electronic fan sets is three, two of the electronic fan sets are both arranged opposite to the condenser and the high-temperature radiator, and the other electronic fan set is arranged opposite to the low-temperature radiator and the high-temperature radiator.

Optionally, the low-temperature heat dissipation system further includes a motor controller connected to the low-temperature heat dissipation pipeline, and the motor controller is located between the second water pump and the motor.

Optionally, the air conditioning system further includes an air conditioning heating circuit, and the air conditioning heating circuit includes: one end of the air-conditioning heating pipeline is communicated with the high-temperature heat dissipation pipeline between the engine and the thermostat, and the other end of the air-conditioning heating pipeline is communicated with the high-temperature heat dissipation pipeline between the first water pump and the high-temperature radiator; the warm air core body is connected to the air conditioning heat pipeline; and the second stop valve is arranged on the air conditioning heat pipeline and is positioned at the upstream of the warm air core body.

Optionally, the hybrid vehicle thermal management system further includes a battery thermal management system, where the battery thermal management system includes a battery heating loop and a battery cooling loop, the battery heating loop is suitable for heating the battery pack, and the battery cooling loop is suitable for cooling the battery pack.

Optionally, the battery heating circuit includes: one end of the battery heating pipeline is communicated with the air conditioner heating pipeline on the upstream of the second stop valve, and the other end of the battery heating pipeline is communicated with the air conditioner heating pipeline on the downstream of the hot air core machine; the heat exchanger is arranged in the battery heating pipeline; a third shutoff valve disposed in the battery heating line and upstream of the heat exchanger.

Optionally, the battery refrigeration circuit includes: one end of the battery refrigeration pipeline is communicated with the air conditioner refrigeration pipeline between the first stop valve and the condenser, the other end of the battery refrigeration pipeline is communicated with the air conditioner refrigeration pipeline between the evaporator and the compressor, and the heat exchanger is connected in the battery heating pipeline; and the electronic expansion valve is arranged in the battery refrigeration pipeline and is positioned at the upstream of the heat exchanger.

Optionally, the battery thermal management system further includes a battery self-circulation loop, where the battery self-circulation loop includes: one end of the battery self-circulation pipeline is connected with a circulation outlet of the heat exchanger, and the other end of the battery self-circulation pipeline is connected with a circulation inlet of the heat exchanger; the battery pack is arranged in the battery self-circulation pipeline; and the third water pump is arranged in the battery self-circulation pipeline and is positioned at the downstream of the battery pack.

Optionally, the hybrid vehicle thermal management system further includes a supercharger heat dissipation system, and the supercharger heat dissipation system includes: the supercharger heat dissipation pipeline is a closed loop circulation pipeline; the turbocharger is arranged in the supercharger heat dissipation pipeline; and the intercooler is arranged in the supercharger heat dissipation pipeline and used for cooling the turbocharger.

Optionally, the intercooler is disposed between the high-temperature radiator and the condenser, and the intercooler and the low-temperature radiator are distributed side by side.

The invention also provides a control method of the hybrid vehicle thermal management system, wherein one or more electronic fan sets can be selectively started according to the working conditions of the condenser, the low-temperature radiator and the high-temperature radiator.

Optionally, the number of the electronic fan sets is three, two of the electronic fan sets are both arranged opposite to the condenser and the high-temperature radiator, and the other electronic fan set is arranged opposite to the low-temperature radiator and the high-temperature radiator; the selectively starting one or more electronic fan sets according to the working conditions of the condenser, the low-temperature radiator and the high-temperature radiator specifically comprises: when the engine works, the condenser and the motor do not work; or when the engine and the motor work and the condenser does not work; or when the engine, the condenser and the motor are all working; or when the engine does not work and the condenser and the motor work, the three electronic fan sets are all started; when the engine and the condenser work and the motor does not work, the two electronic fan sets opposite to the high-temperature radiator and the condenser are both started; when the engine and the condenser do not work and the motor works, the electronic fan set opposite to the low-temperature radiator is started.

Optionally, when the engine is in operation and the condenser and the motor are not in operation, the three electronic fan sets further include after all being turned on: the three electronic fan sets can adjust duty ratios according to the water temperature T1 of the engine; when the engine and the motor both work, when the condenser is out of work, then three still include after the electron fan group all opens: the duty ratios of the three electronic fan sets can be adjusted according to the water temperature T1 of the engine and the temperature T2 of the motor; when the engine and the condenser both work, when the motor does not work, then with the engine and the condenser relative two the electronic fan group after all opening still include: the duty ratios of the two electronic fan sets can be adjusted according to the water temperature T1 of the engine and the pressure value P of the condenser; when the engine and the condenser do not work, when the motor works, the electronic fan set opposite to the engine and the condenser is started and then further comprises: the electronic fan set can adjust the duty ratio according to the motor temperature T2; when the engine does not work, when condenser and motor all work, then three still include after the electron fan group all opens: the duty ratio of the two electronic fan sets opposite to the condenser can be adjusted according to the pressure value P of the condenser, and the duty ratio of the electronic fan set opposite to the low-temperature radiator can be adjusted according to the temperature T2 of the motor; when the engine, the condenser and the motor all work, then still include after three electron fan group all opens: the three electronic fan sets can adjust duty ratios according to the temperature T1 of the engine water, the temperature T2 of the motor and the pressure value P of the condenser.

The invention also provides a hybrid vehicle comprising a hybrid vehicle thermal management system as described above.

The invention has the following advantages:

1. the high-temperature heat dissipation system comprises an engine, a thermostat, a high-temperature radiator and a first water pump which are connected through a high-temperature heat dissipation pipeline to form a closed loop, cooling water circularly flows in the high-temperature heat dissipation pipeline to cool the engine, and normal operation of the engine is ensured; the low-temperature heat dissipation system comprises a low-temperature heat radiator, a second water pump and a motor which are connected through a low-temperature heat dissipation pipeline to form a closed loop, so that cooling water circularly flows in the low-temperature heat dissipation pipeline to cool the motor, and the normal operation of the motor is ensured; the air-conditioning refrigeration circuit comprises a compressor, a condenser, a first stop valve, a thermal expansion valve and an evaporator which are connected through an air-conditioning refrigeration pipeline to form a closed loop, so that cooling water circularly flows in the air-conditioning refrigeration pipeline to cool a cab, and the comfort of the cab is improved;

in addition, the low-temperature radiator and the condenser are arranged on one side of the high-temperature radiator, so that the low-temperature radiator, the condenser and the high-temperature radiator are integrated together for arrangement, the structure is compact, and the space occupation is reduced; the low-temperature radiator, the condenser and the high-temperature radiator share the same electronic fan system for heat dissipation, so that the system structure is further simplified, the cost is low, and the arrangement is compact; and the electronic fan sets are arranged opposite to the condenser, the high-temperature radiator and the low-temperature radiator, and the electronic fan sets can be selectively started according to the running conditions of the low-temperature radiator, the condenser and the high-temperature radiator, so that the corresponding components can be cooled, the energy consumption and the running cost of the electronic fan system are reduced as much as possible, and the economical efficiency is good.

2. According to the thermal management system for the hybrid vehicle, the number of the electronic fan sets is three, two electronic fan sets are arranged opposite to the condenser and the high-temperature radiator, and the other electronic fan set is arranged opposite to the low-temperature radiator and the high-temperature radiator. According to the arrangement, when the engine works, the condenser and the motor do not work or the engine and the motor both work, the condenser does not work or the engine does not work, the condenser and the motor both work or the engine, the condenser and the motor all work, the three electronic fan sets are all started to simultaneously radiate heat and cool the correspondingly arranged structures; when the engine and the condenser work and the motor does not work, the two electronic fan sets opposite to the high-temperature radiator and the condenser are both started to radiate heat and reduce temperature of the high-temperature radiator and the condenser which are oppositely arranged; when the engine and the condenser do not work, and the motor works, the electronic fan set arranged opposite to the low-temperature radiator is started to cool the oppositely arranged low-temperature radiator, so that the three electronic fan sets can be selectively started to dissipate heat according to the working conditions of the high-temperature radiator, the condenser and the low-temperature radiator through the arrangement, the heat dissipation effect is ensured to the maximum extent, the idling of the electronic fans is avoided, and the running energy consumption and the cost of an electronic fan system are saved.

3. The air conditioning system also comprises an air conditioning heating loop, wherein the air conditioning heating loop comprises an air conditioning heating pipeline, a warm air core and a second stop valve, one end of the air conditioning heating pipeline is communicated with a high-temperature heat dissipation pipeline between an engine and a thermostat, the other end of the air conditioning heating pipeline is communicated with a high-temperature heat dissipation pipeline between a first water pump and a high-temperature heat sink, the warm air core is connected to the air conditioning heating pipeline, the second stop valve is arranged on the air conditioning heating pipeline, and the second stop valve is positioned at the upstream of the warm air core. When heating is needed, hot water in a high-temperature heat dissipation pipeline from the engine flows into the air-conditioning heat dissipation pipeline, flows to the warm air core body through the second stop valve to supply heat indoors, then flows back to the high-temperature heat dissipation pipeline between the first water pump and the high-temperature heat radiator, and by means of circulation, hot water of the engine is utilized to heat a cab, comfort is improved, heat utilization of the hot water of the engine is improved, heat energy recycling is achieved, meanwhile, an independent heat exchanger is not needed, and the heat-exchange-based air-conditioning heat pump is good in economic benefit.

4. The hybrid vehicle heat management system also comprises a battery heat management system, wherein the battery heat management system comprises a battery heating loop and a battery refrigerating loop, the battery heating loop is suitable for heating the battery pack, and the battery refrigerating loop is suitable for cooling the battery pack. Through the synergistic effect of the battery heating loop and the battery refrigerating loop, the temperature of the battery pack is controlled in a reasonable range, the problems of long supercooling starting time of the battery pack and heat dissipation of the battery pack during operation are solved, and the normal and efficient operation of the battery pack is ensured.

5. The battery heating loop comprises a battery heating pipeline, a heat exchanger and a third stop valve, one end of the battery heating pipeline is communicated with the air conditioner heating pipeline on the upstream of the second stop valve, the other end of the battery heating pipeline is communicated with the air conditioner heating pipeline on the downstream of the warm air core machine, the heat exchanger is arranged in the battery heating pipeline, and the third stop valve is arranged in the battery heating pipeline and located on the upstream of the heat exchanger. When the battery pack needs to be heated, hot water in the air-conditioning heating pipeline flows into the battery heating pipeline and flows to the heat exchanger through the third stop valve for heat exchange, and hot water after heat exchange flows back to the air-conditioning heating pipeline on the downstream of the warm air core machine through the battery heating pipeline, so that continuous heat exchange from engine hot water to the heat exchanger is realized through circulation, the battery pack is heated, the starting of the battery pack is accelerated, the heat utilization of the engine hot water is further improved, the heat energy is recycled, and the economic benefit is good.

6. The invention relates to a hybrid vehicle heat management system.A battery refrigeration loop comprises a battery refrigeration pipeline and an electronic expansion valve, one end of the battery refrigeration pipeline is communicated with an air-conditioning refrigeration pipeline between a first stop valve and a condenser, the other end of the battery refrigeration pipeline is communicated with the air-conditioning refrigeration pipeline between an evaporator and a compressor, a heat exchanger is connected in the battery heating pipeline, and the electronic expansion valve is arranged in the battery refrigeration pipeline and is positioned at the upstream of the heat exchanger. When the battery pack needs to refrigerate, cold water in the air-conditioning refrigeration pipeline flows into the air-conditioning refrigeration pipeline and flows into the heat exchanger through the electronic expansion valve for heat exchange, and the cold water after heat exchange flows back into the air-conditioning refrigeration pipeline through the air-conditioning refrigeration pipeline.

7. The battery self-circulation loop comprises a battery self-circulation pipeline, a battery pack and a third water pump, one end of the battery self-circulation pipeline is connected with a circulation outlet of the heat exchanger, the other end of the battery self-circulation pipeline is connected with a circulation inlet of the heat exchanger, the battery pack is arranged in the battery self-circulation pipeline, and the third water pump is arranged in the battery self-circulation pipeline and located at the downstream of the battery pack. According to the arrangement, the circulating water of the battery self-circulation pipeline flows into the heat exchanger to exchange heat with cold water or hot water, the circulating water flows to the battery pack after heat exchange to heat or refrigerate the battery pack, then the circulating water flows through the third water pump and flows back to the heat exchanger for circulating heat exchange, and therefore the battery pack is continuously heated or refrigerated, and the battery pack is maintained at a reasonable temperature.

8. The heat management system of the hybrid vehicle also comprises a supercharger heat dissipation system, wherein the supercharger heat dissipation system comprises a supercharger heat dissipation pipeline, a turbocharger and an intercooler, the supercharger heat dissipation pipeline is a closed loop circulation pipeline, the turbocharger is arranged in the supercharger heat dissipation pipeline, and the intercooler is arranged in the supercharger heat dissipation pipeline to cool the turbocharger. Water in the supercharger heat dissipation pipeline flows in a circulating mode, flows to the turbocharger after being cooled by the intercooler to cool the turbocharger, and normal operation of the turbocharger is guaranteed.

9. According to the hybrid vehicle thermal management system, the intercooler is arranged between the high-temperature radiator and the condenser, and the intercooler and the low-temperature radiator are distributed in parallel. The intercooler, the high-temperature radiator, the low-temperature radiator and the condenser are integrated together and share one set of electronic fan system, and the structure compactness is further improved.

10. According to the control method of the hybrid vehicle thermal management system, one or more electronic fan sets can be selectively started according to the working conditions of the condenser, the low-temperature radiator and the high-temperature radiator, so that the corresponding components can be cooled, the energy consumption and the running cost of the electronic fan system are reduced as much as possible, and the economical efficiency is good.

11. The control method of the thermal management system of the hybrid vehicle, provided by the invention, for selectively starting one or more electronic fan sets according to the working conditions of the condenser, the low-temperature radiator and the high-temperature radiator comprises the following specific steps: when the engine works, the condenser and the motor do not work or the engine and the motor both work, the condenser does not work or the engine does not work, the condenser and the motor both work or the engine, the condenser and the motor all work, the three electronic fan sets are all started to simultaneously radiate heat and cool the correspondingly arranged structure; when the engine and the condenser work and the motor does not work, the two electronic fan sets opposite to the high-temperature radiator and the condenser are both started to radiate heat and reduce temperature of the high-temperature radiator and the condenser which are oppositely arranged; when the engine and the condenser do not work, and the motor works, the electronic fan set arranged opposite to the low-temperature radiator is started to cool the oppositely arranged low-temperature radiator, so that the three electronic fan sets can be selectively started to radiate heat according to the working conditions of the high-temperature radiator, the condenser and the low-temperature radiator, the radiating effect is ensured to the maximum extent, the idling of the electronic fans is avoided, and the operation cost and the energy consumption of the electronic fan system are reduced.

12. The hybrid vehicle comprises the thermal management system of the hybrid vehicle, and has the advantages of compact structure, space occupation reduction, low cost and good economy.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 shows an overall connection schematic of a hybrid vehicle thermal management system of an embodiment of the present invention;

FIG. 2 illustrates a schematic perspective view of a portion of a hybrid vehicle thermal management system in accordance with an embodiment of the present invention;

FIG. 3 illustrates a side view of a portion of a hybrid vehicle thermal management system in accordance with an embodiment of the present invention.

Description of reference numerals:

1. a high temperature heat dissipation system; 11. a high temperature heat dissipation pipeline; 12. an engine; 13. a thermostat; 14. a high temperature heat sink; 15. a first water pump; 2. a low temperature heat dissipation system; 21. a low temperature heat dissipation pipeline; 22. a low temperature heat sink; 23. a second water pump; 24. a motor controller; 25. a motor; 3. an air conditioning refrigeration circuit; 31. an air-conditioning refrigeration pipeline; 32. a compressor; 33. a condenser; 34. a first shut-off valve; 35. a thermostatic expansion valve; 36. an evaporator; 4. an electronic fan system; 41. an electronic fan set; 5. an air conditioning heating loop; 51. an air conditioning heating pipeline; 52. a warm air core body; 53. a second stop valve; 6. a battery heating circuit; 61. a battery heating pipeline; 62. a heat exchanger; 63. a third stop valve; 7. a battery refrigeration circuit; 71. a battery refrigeration circuit; 72. an electronic expansion valve; 8. a battery self-circulation loop; 81. a battery self-circulation pipeline; 82. a battery pack; 83. a third water pump; 9. a supercharger heat dissipation system; 91. a supercharger heat dissipation pipeline; 92. a turbocharger; 93. and an intercooler.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 3, the present embodiment discloses a hybrid vehicle thermal management system, which includes a high temperature heat dissipation system 1, a low temperature heat dissipation system 2, an air conditioning system and an electronic fan system 4, wherein the high temperature heat dissipation system 1 includes an engine 12, a thermostat 13, a high temperature radiator 14 and a first water pump 15 which are connected to form a closed loop through a high temperature heat dissipation pipeline 11, the low temperature heat dissipation system 2 includes a low temperature radiator 22, a second water pump 23 and a motor 25 which are connected to form a closed loop through a low temperature heat dissipation pipeline 21, the low temperature radiator 22 is disposed at one side of the high temperature radiator 14, the air conditioning system includes an air conditioning refrigeration circuit 3, the air conditioning refrigeration circuit 3 includes a compressor 32, a condenser 33, a first stop valve 34, a thermostatic expansion valve 35 and an evaporator 36 which are connected to form a closed loop through an air conditioning refrigeration pipeline 31, the condenser 33 is disposed at one side of the high temperature radiator 14 and is located at the same side as the low temperature radiator 22, the electronic fan system 4 includes a plurality of electronic fan sets 41 which are distributed side by side and can be selectively opened, and the electronic fan sets 41 are disposed opposite to the condenser 33, the high temperature radiator 14 and the low temperature radiator 22.

In the thermal management system for the hybrid vehicle of the embodiment, the high-temperature heat dissipation system 1 comprises anengine 12, athermostat 13, a high-temperature radiator 14 and afirst water pump 15 which are connected through a high-temperatureheat dissipation pipeline 11 to form a closed loop, so that hot water of theengine 12 circularly flows between the high-temperature radiator 14 and theengine 12 to continuously cool theengine 12, and normal operation of theengine 12 is ensured; the low-temperatureheat dissipation system 2 comprises a low-temperature heat radiator 22, asecond water pump 23 and amotor 25 which are connected through a low-temperatureheat dissipation pipeline 21 to form a closed loop, so that cooling water circularly flows in the low-temperatureheat dissipation pipeline 21 to cool themotor 25, and normal operation of themotor 25 is ensured; the air-conditioning refrigeration circuit 3 comprises acompressor 32, acondenser 33, afirst stop valve 34, athermostatic expansion valve 35 and anevaporator 36 which are connected through an air-conditioning refrigeration pipeline 31 to form a closed loop, so that cooling water circularly flows in the air-conditioning refrigeration pipeline 31 to cool the cab, and the comfort of the cab is improved;

in addition, the low-temperature radiator 22 and thecondenser 33 are both arranged on one side of the high-temperature radiator 14, so that the three are integrated together for arrangement, the structure is compact, and the space occupation is reduced; the low-temperature radiator 22, thecondenser 33 and the high-temperature radiator 14 share the sameelectronic fan system 4 for heat dissipation, so that the system structure is further simplified, the cost is low, and the arrangement is compact; and the electronic fan sets 41 are arranged opposite to thecondenser 33, the high-temperature radiator 14 and the low-temperature radiator 22, and the plurality of electronic fan sets 41 can be selectively started according to the running conditions of the low-temperature radiator 22, thecondenser 33 and the high-temperature radiator 14, so that the corresponding components can be cooled, the energy consumption and the running cost of theelectronic fan system 4 are reduced as much as possible, and the economical efficiency is good.

The structure of the thermal management system for a hybrid vehicle is described in detail below with reference to the accompanying drawings.

The high-temperature heat dissipation system 1 mainly dissipates heat and cools theengine 12, so that theengine 12 is prevented from being burnt out due to overhigh temperature. Specifically, hot water flowing out of theengine 12 sequentially flows through thethermostat 13 to the high-temperature radiator 14, theelectronic fan system 4 dissipates heat and cools the hot water in the high-temperature radiator 14, and the cooled hot water flows through thefirst water pump 15 from the high-temperature radiator 14 to theengine 12 to achieve circulating cooling of theengine 12, so that normal operation of theengine 12 is ensured.

The low-temperatureheat dissipation system 2 mainly dissipates heat and cools themotor 25, so that themotor 25 is prevented from being burnt out due to overhigh temperature. Specifically, the hot water flowing out of themotor 25 flows to the low-temperature radiator 22, theelectronic fan system 4 dissipates heat and cools the hot water in the low-temperature radiator 22, and the cooled hot water flows through thesecond water pump 23 from the low-temperature radiator 22 to themotor 25 to realize circulating cooling of themotor 25, so that normal operation of themotor 25 is ensured.

Further, the low temperatureheat dissipation system 2 further includes amotor controller 24 connected to the low temperatureheat dissipation pipeline 21, and themotor controller 24 is located between thesecond water pump 23 and themotor 25. Themotor controller 24 and themotor 25 are connected in series to the same low-temperatureheat dissipation pipeline 21, synchronous heat dissipation of themotor controller 24 and themotor 25 is achieved through the low-temperature heat sink 22, synchronous normal operation of themotor controller 24 and themotor 25 is guaranteed, the cooling effect is guaranteed, and setting and structure simplification of heat dissipation facilities are reduced.

In this embodiment, there are three electronic fan sets 41, two of the electronic fan sets 41 are disposed opposite to thecondenser 33 and thehigh temperature radiator 14, and the other electronic fan set 41 is disposed opposite to thelow temperature radiator 22 and thehigh temperature radiator 14.

According to the arrangement, when the engine 12 works, the condenser 33 and the motor 25 do not work or when the engine 12 and the motor 25 work and the condenser 33 does not work or when the engine 12 does not work and the condenser 33 and the motor 25 work or when the engine 12, the condenser 33 and the motor 25 work, the three electronic fan sets 41 are all started to simultaneously radiate heat and cool the correspondingly arranged structures; when the engine 12 and the condenser 33 both work and the motor 25 does not work, the two electronic fan sets 41 opposite to the high-temperature radiator 14 and the condenser 33 are both started to radiate heat and reduce temperature of the high-temperature radiator 14 and the condenser 33 which are arranged oppositely; when the engine 12 and the condenser 33 do not work, and the motor 25 works, the electronic fan set 41 arranged opposite to the low-temperature radiator 22 is turned on to radiate heat and cool the low-temperature radiator 22 arranged opposite to the low-temperature radiator 22, so that the three electronic fan sets 41 can be selectively started to radiate heat according to the working conditions of the high-temperature radiator 14, the condenser 33 and the low-temperature radiator 22 through the arrangement, the heat radiation effect is ensured to the maximum extent, idle running of the electronic fans is avoided, and the operation energy consumption and the cost of the electronic fan system 4 are saved.

Specifically, each electronic fan set 41 includes two parallel electronic fans to enhance the heat dissipation and cooling effects of the electronic fans.

The air conditioning system further comprises an air conditioning and heating loop 5, the air conditioning and heating loop 5 comprises an air conditioning andheating pipeline 51, awarm air core 52 and asecond stop valve 53, one end of the air conditioning andheating pipeline 51 is communicated with the high-temperatureheat dissipation pipeline 11 between theengine 12 and thethermostat 13, the other end of the air conditioning andheating pipeline 51 is communicated with the high-temperatureheat dissipation pipeline 11 between thefirst water pump 15 and the high-temperature radiator 14, thewarm air core 52 is connected to the air conditioning andheating pipeline 51, thesecond stop valve 53 is arranged on the air conditioning andheating pipeline 51, and thesecond stop valve 53 is located on the upstream of thewarm air core 52.

When heating is needed, hot water in the high-temperatureheat dissipation pipeline 11 from theengine 12 flows into the air-conditioning heating pipeline 51, flows to thewarm air core 52 through thesecond stop valve 53 to supply heat indoors, and then flows back to the high-temperatureheat dissipation pipeline 11 between thefirst water pump 15 and the high-temperature radiator 14, and by means of circulation, the hot water of theengine 12 is utilized to heat the cab, comfort is improved, heat utilization of the hot water of theengine 12 is also improved, recycling of the heat energy is achieved, meanwhile, anindependent heat exchanger 62 is not needed to be arranged, and the economic benefit is good.

It is understood herein that the second cut-offvalve 53 is opened when the air-conditioning heating circuit 5 is operated and is closed when the air-conditioning heating circuit 5 is not operated, so as to ensure the heat radiation effect of the high temperature heat radiation system 1.

In this embodiment, the hybrid vehicle thermal management system further includes a battery thermal management system, and the battery thermal management system includes a battery heating circuit 6 and abattery cooling circuit 7, where the battery heating circuit 6 is adapted to heat thebattery pack 82, and thebattery cooling circuit 7 is adapted to cool thebattery pack 82. Through the synergistic effect of the battery heating loop 6 and thebattery refrigerating loop 7, the temperature of thebattery pack 82 is controlled in a reasonable range, the problems of long supercooling starting time of thebattery pack 82 and heat dissipation of thebattery pack 82 in operation are solved, and the normal and efficient operation of thebattery pack 82 is ensured.

Specifically, the battery heating circuit 6 includes abattery heating line 61, aheat exchanger 62, and a third shut-offvalve 63, one end of thebattery heating line 61 communicates with the air-conditioning heating line 51 upstream of the second shut-offvalve 53, the other end of thebattery heating line 61 communicates with the air-conditioning heating line 51 downstream of the heater core, theheat exchanger 62 is disposed in thebattery heating line 61, and the third shut-offvalve 63 is disposed in thebattery heating line 61 and upstream of theheat exchanger 62. When thebattery pack 82 needs to be heated, hot water in the air-conditioning heating pipeline 51 flows into thebattery heating pipeline 61 and flows into theheat exchanger 62 through thethird stop valve 63 for heat exchange, the hot water after heat exchange flows back into the air-conditioning heating pipeline 51 at the downstream of the warm air core machine through thebattery heating pipeline 61, and by means of circulation, continuous heat exchange from hot water of theengine 12 to theheat exchanger 62 is achieved, so that thebattery pack 82 is heated, the starting of thebattery pack 82 is accelerated, the heat utilization of the hot water of theengine 12 is further improved, the recycling of the heat energy is achieved, and the economic benefit is good.

It is understood herein that the third cut-offvalve 63 is opened when the battery heating circuit 6 is operated and closed when the battery heating circuit 6 is not operated, so as to ensure efficient operation of the upstream air-conditioning heating circuit 5 and the high-temperature heat dissipation system 1.

Thebattery refrigeration circuit 7 includes abattery refrigeration line 71 and anelectronic expansion valve 72, one end of thebattery refrigeration line 71 communicates with the air-conditioning refrigeration line 31 between thefirst cutoff valve 34 and thecondenser 33, the other end of thebattery refrigeration line 71 communicates with the air-conditioning refrigeration line 31 between the evaporator 36 and thecompressor 32, theheat exchanger 62 is connected to thebattery heating line 61, and theelectronic expansion valve 72 is disposed in thebattery refrigeration line 71 and upstream of theheat exchanger 62. When thebattery pack 82 needs to be refrigerated, cold water in the air-conditioning refrigeration pipeline 31 flows into the air-conditioning refrigeration pipeline 31 and flows into theheat exchanger 62 through theelectronic expansion valve 72 for heat exchange, and the cold water after heat exchange flows back into the air-conditioning refrigeration pipeline 31 through the air-conditioning refrigeration pipeline 31, so that thebattery refrigeration loop 7 and the air-conditioning refrigeration loop 3 are integrated, continuous heat exchange from the cold water in the air-conditioning refrigeration pipeline 31 to theheat exchanger 62 is realized, refrigeration and heat dissipation of thebattery pack 82 are realized, the system structure is further simplified, the cold water of the air-conditioning refrigeration loop 3 is integrated, and the system operation efficiency is improved.

It will be appreciated here that theelectronic expansion valve 72 is open when thebattery refrigeration circuit 7 is in operation and closed when thebattery refrigeration circuit 7 is not in operation to ensure efficient operation of the upstream airconditioning refrigeration circuit 3.

Of course, the battery thermal management system further includes a battery self-circulation loop 8, the battery self-circulation loop 8 includes a battery self-circulation pipeline 81, abattery pack 82 and athird water pump 83, one end of the battery self-circulation pipeline 81 is connected to a circulation outlet of theheat exchanger 62, the other end of the battery self-circulation pipeline 81 is connected to a circulation inlet of theheat exchanger 62, thebattery pack 82 is disposed in the battery self-circulation pipeline 81, and thethird water pump 83 is disposed in the battery self-circulation pipeline 81 and located downstream of thebattery pack 82. According to the arrangement, the circulating water of the battery self-circulation pipeline 81 flows into theheat exchanger 62 to exchange heat with cold water or hot water, the circulating water flows to thebattery pack 82 after heat exchange to heat or refrigerate thebattery pack 82, then the circulating water flows through thethird water pump 83 and flows back to theheat exchanger 62 to exchange heat in a circulating mode, and therefore thebattery pack 82 is continuously heated or refrigerated, and the temperature of thebattery pack 82 is kept reasonable.

In this embodiment, aheat exchanger 62 is provided, thebattery refrigeration circuit 7 and the battery heating circuit 6 are both coupled with the battery self-circulation circuit 8 through theheat exchanger 62, and thebattery pack 82 is cooled or heated through heat exchange or temperature rise of theheat exchanger 62, so that the structure is compact, and the heat exchange cost is low.

In this embodiment, the hybrid vehicle thermal management system further includes a supercharger heat dissipation system 9, the supercharger heat dissipation system 9 includes a superchargerheat dissipation pipeline 91, aturbocharger 92 and anintercooler 93, the superchargerheat dissipation pipeline 91 is a closed loop circulation pipeline, theturbocharger 92 is disposed in the superchargerheat dissipation pipeline 91, and theintercooler 93 is disposed in the superchargerheat dissipation pipeline 91 to cool theturbocharger 92. The water in theheat dissipation pipeline 91 of the turbocharger flows in a circulating manner, is cooled by theintercooler 93 and then flows to theturbocharger 92 to cool theturbocharger 92, so that the normal operation of theturbocharger 92 is ensured.

Further, anintercooler 93 is disposed between thehigh temperature radiator 14 and thecondenser 33, and theintercooler 93 and thelow temperature radiator 22 are distributed side by side. Theintercooler 93 is integrated with the high-temperature radiator 14, the low-temperature radiator 22 and thecondenser 33, and shares a set ofelectronic fan system 4 with the high-temperature radiator 14, the low-temperature radiator 22 and the condenser, so that the structure compactness is further increased.

To facilitate understanding of the hybrid vehicle thermal management system of the present embodiment, the operation thereof will now be described as follows:

the high-temperature heat dissipation system 1 operates: hot water flowing out of theengine 12 sequentially flows through thethermostat 13 to the high-temperature radiator 14, theelectronic fan system 4 radiates heat and cools the hot water in the high-temperature radiator 14, and the cooled hot water flows through thefirst water pump 15 from the high-temperature radiator 14 to theengine 12 to realize circulating cooling of theengine 12, so that normal operation of theengine 12 is ensured;

the low-temperatureheat dissipation system 2 operates: hot water flowing out of themotor 25 flows to the low-temperature radiator 22, theelectronic fan system 4 radiates heat of the hot water in the low-temperature radiator 22 and cools the hot water, and the cooled hot water flows through thesecond water pump 23 from the low-temperature radiator 22 to themotor 25 to realize circulating cooling of themotor 25 and ensure normal operation of themotor 25;

refrigerating the air conditioning system: the cooling water flows from thecompressor 32 through thecondenser 33, thefirst stop valve 34 and thethermostatic expansion valve 35 to reach theevaporator 36, and in the process, thecondenser 33 is cooled and radiated by the electronic fan set 41, so that the cooling water circularly flows in the air-conditioning refrigeration pipeline 31 to cool the cab, and the comfort of the cab is improved;

heating of an air conditioning system: hot water in the high-temperatureheat radiation pipeline 11 from theengine 12 flows into the airconditioner heating pipeline 51, flows to thewarm air core 52 through thesecond stop valve 53 to supply heat to the indoor, and then flows back to the high-temperatureheat radiation pipeline 11 between thefirst water pump 15 and the high-temperature radiator 14, so that circulation is performed, and the hot water of theengine 12 is used for heating the cab;

the battery heating circuit 6 operates: hot water in the air-conditioning heating pipeline 51 flows into thebattery heating pipeline 61 and flows to theheat exchanger 62 through thethird stop valve 63 to exchange heat with circulating water in the battery self-circulation pipeline 81, the hot water after heat exchange flows back into the air-conditioning heating pipeline 51 at the downstream of the warm air core machine through thebattery heating pipeline 61, and the circulating water after heat exchange and temperature rise flows to thebattery pack 82 to heat thebattery pack 82 and accelerate the start of thebattery pack 82;

thebattery refrigeration circuit 7 operates: cold water in the air-conditioning refrigeration pipeline 31 flows into the air-conditioning refrigeration pipeline 31 and flows into theheat exchanger 62 through theelectronic expansion valve 72 to exchange heat with circulating water in the battery self-circulation pipeline 81, the cold water after heat exchange flows back into the air-conditioning refrigeration pipeline 31 through the air-conditioning refrigeration pipeline 31, and the circulating water after heat exchange and temperature reduction flows to thebattery pack 82 to refrigerate and dissipate heat for thebattery pack 82 and reduce the temperature of the battery pack;

the supercharger cooling system 9 operates: the water in the superchargerheat dissipation pipeline 91 circularly flows, is cooled by theintercooler 93 and then flows to theturbocharger 92 to cool theturbocharger 92, so that the normal operation of theturbocharger 92 is ensured.

In addition, it should be noted that, since the high-temperature heat dissipation system 1, the air-conditioning heating circuit 5 and the battery heating circuit 6 are integrally connected together, when the three are operated simultaneously, thesecond stop valve 53 and thethird stop valve 63 are both opened; when only the high temperature heat dissipation system 1 is operating, both the second cut-offvalve 53 and the third cut-offvalve 63 are closed; when the air conditioning heat circuit 5 is operated and the battery heating circuit 6 is not operated, thesecond stop valve 53 is opened and thethird stop valve 63 is closed; when the battery heating circuit 6 is in operation and the air-conditioning heating circuit 5 is not in operation, thethird stop valve 63 is opened and thesecond stop valve 53 is closed. Not only avoids the mutual influence among the three, but also ensures the normal operation among all the loops.

The air-conditioning refrigeration circuit 3 and thebattery refrigeration circuit 7 are integrally connected together, so that when both are operated simultaneously, thefirst stop valve 34 and theelectronic expansion valve 72 are both opened, when only the air-conditioning refrigeration circuit 3 is operated, thefirst stop valve 34 is opened and theelectronic expansion valve 72 is closed, and when only thebattery refrigeration circuit 7 is operated, theelectronic expansion valve 72 is opened and thefirst stop valve 34 is closed.

The embodiment also discloses a control method of the hybrid vehicle thermal management system, one or more electronic fan sets 41 can be selectively started according to the working conditions of thecondenser 33, the low-temperature radiator 22 and the high-temperature radiator 14, so that the corresponding components can be cooled, the energy consumption and the running cost of theelectronic fan system 4 are reduced as much as possible, and the economical efficiency is good.

Specifically, the selective activation of one or more electronic fan sets 41 according to the working conditions of thecondenser 33, the low-temperature radiator 22 and the high-temperature radiator 14 includes the following conditions:

when theengine 12 is in operation and thecondenser 33 and themotor 25 are not in operation, the three electronic fan sets 41 are all turned on to continuously cool and dissipate heat for theengine 12.

Further, the duty ratio of the three electronic fan sets 41 can be adjusted according to the water temperature T1 of theengine 12, specifically, when the water temperature T1 of theengine 12 is too high, the duty ratio of the electronic fan set 41 is increased, the rotation speed of the electronic fan is increased to enhance the heat dissipation and cooling of the high-temperature radiator 14, when the water temperature T1 of theengine 12 is too low, the duty ratio of the electronic fan set 41 is decreased, and the heat dissipation of the high-temperature radiator 14 can also be realized by decreasing the rotation speed of the electronic fan, so that theengine 12 can be fully cooled and cooled by flexibly adjusting the duty ratio of the electronic fan set 41, the flexibility is strong, and the energy consumption of theelectronic fan system 4 is also reduced while the heat dissipation effect is ensured.

When theengine 12 and themotor 25 are both operated and thecondenser 33 is not operated, the three electronic fan sets 41 are all turned on to simultaneously dissipate heat and cool themotor 25 and theengine 12.

Further, the three electronic fan sets 41 can adjust the duty ratio according to the water temperature T1 of theengine 12 and the temperature T2 of themotor 25. Specifically, when the water temperature T1 of theengine 12 and the temperature T2 of themotor 25 are too high (the highest value is taken between the two), the duty ratio of theelectronic fan unit 41 is increased, and the rotational speed of the electronic fan is increased to accelerate the heat dissipation and cooling of the high-temperature radiator 14 and the low-temperature radiator 22, and when the water temperature T1 of theengine 12 and the temperature T2 of themotor 25 are too low (the lowest value is taken between the two), the duty ratio of theelectronic fan unit 41 is decreased, and the heat dissipation of the high-temperature radiator 14 and the low-temperature radiator 22 can also be realized by decreasing the rotational speed of the electronic fan, so that the sufficient heat dissipation and cooling of theengine 12 and themotor 25 are realized.

When theengine 12 and thecondenser 33 are both operated and themotor 25 is not operated, the two electronic fan sets 41 opposite to theengine 12 and thecondenser 33 are both turned on to simultaneously radiate heat and cool the high-temperature radiator 14 and thecondenser 33.

Further, the two electronic fan sets 41 opposite to theengine 12 and thecondenser 33 can adjust the duty ratio according to theengine 12 water temperature T1 and thecondenser 33 pressure value P. Specifically, when the pressure values P of the water temperature T1 of theengine 12 and thecondenser 33 are too high (the highest value is taken from the two values), the duty ratios of the two electronic fan sets 41 are increased, the rotation speed of the electronic fan is increased to accelerate the heat dissipation and cooling of the high-temperature radiator 14 and thecondenser 33, and when the pressure values P of the water temperature T1 of theengine 12 and thecondenser 33 are too low (the lowest value is taken from the two values), the duty ratios of the two electronic fan sets 41 are decreased, and the heat dissipation of the high-temperature radiator 14 and thecondenser 33 can be realized by decreasing the rotation speed of the electronic fan, so that the sufficient heat dissipation and cooling of theengine 12 and thecondenser 33 are realized.

When theengine 12 and thecondenser 33 do not work and themotor 25 works, the electronic fan set 41 arranged opposite to the low-temperature radiator 22 is turned on to radiate heat and reduce the temperature of the low-temperature radiator 22.

Further, theelectronic fan group 41 disposed opposite to thelow temperature radiator 22 may adjust the duty ratio according to the temperature T2 of themotor 25. Specifically, when the temperature T2 of themotor 25 is too high, the duty ratio of the electronic fan set 41 is increased, the rotation speed of the electronic fan is increased to accelerate the cooling of the low-temperature heat sink 22, and when the temperature T2 of themotor 25 is too low, the duty ratio of the electronic fan set 41 is decreased, and the reduction of the rotation speed of the electronic fan can also realize the cooling of the low-temperature heat sink 22, so that the sufficient cooling of themotor 25 is realized.

When theengine 12 is not operated and thecondenser 33 and themotor 25 are both operated, the three electronic fan sets 41 are all turned on to dissipate heat and cool thecondenser 33 and the low-temperature radiator 22.

Further, the duty ratio of the two electronic fan sets 41 opposite to thecondenser 33 can be adjusted according to the pressure value P of thecondenser 33, and the duty ratio of the electronic fan set 41 opposite to thelow temperature radiator 22 can be adjusted according to the temperature T2 of themotor 25. Specifically, when the pressure value P of thecondenser 33 is too high, the duty ratios of the twoelectronic fan groups 41 opposite to thecondenser 33 are increased, and the rotational speed of the electronic fans is increased to accelerate the heat dissipation and cooling of thecondenser 33, and when the pressure value P of thecondenser 33 is too low, the duty ratios of the twoelectronic fan groups 41 opposite to thecondenser 33 are decreased, and the decrease in the rotational speed of the electronic fans can also realize the heat dissipation of thecondenser 33, thereby realizing the refrigeration of the air conditioner; when the temperature T2 of themotor 25 is too high, the duty ratio of the electronic fan set 41 opposite to the low-temperature radiator 22 is increased, the rotational speed of the electronic fan is increased, so that the heat dissipation and cooling of the low-temperature radiator 22 are accelerated, when the temperature T2 of themotor 25 is too low, the duty ratio of the electronic fan set 41 opposite to the low-temperature radiator 22 is decreased, the heat dissipation of the low-temperature radiator 22 can also be realized by decreasing the rotational speed of the electronic fan, and thus, the sufficient heat dissipation and cooling of themotor 25 are realized.

When theengine 12, thecondenser 33 and themotor 25 are all operated, the three electronic fan sets 41 are all turned on to dissipate heat and cool the high-temperature radiator 14, thecondenser 33 and the low-temperature radiator 22.

Further, the three electronic fan sets 41 may adjust duty ratios according to theengine 12 water temperature T1, themotor 25 temperature T2, and thecondenser 33 pressure value P. Specifically, when the water temperature T1 of theengine 12, the temperature T2 of themotor 25, and the pressure P of thecondenser 33 are too high (highest values among the three), the duty ratios of the three electronic fan sets 41 are increased, the rotation speed of the electronic fan is increased to accelerate the heat dissipation and cooling of the high-temperature radiator 14, thecondenser 33, and the low-temperature radiator 22, and when the water temperature T1 of theengine 12, the temperature T2 of themotor 25, and the pressure P of thecondenser 33 are too low (lowest values among the three), the duty ratios of the three electronic fan sets 41 are decreased, and the heat dissipation of the high-temperature radiator 14, thecondenser 33, and the low-temperature radiator 22 can also be realized by decreasing the rotation speed of the electronic fan.

Therefore, through the above arrangement, the three electronic fan sets 41 can selectively perform start-up heat dissipation and duty ratio adjustment according to the operating conditions of the high-temperature radiator 14, thecondenser 33 and the low-temperature radiator 22, so as to ensure the heat dissipation effect to the maximum extent, avoid idling of the electronic fans, and reduce the operating cost and energy consumption of theelectronic fan system 4.

Further, in this embodiment, themotor controller 24 is further disposed on the low-temperatureheat dissipation pipeline 21 to control the operation of themotor 25, and the low-temperatureheat dissipation system 2 simultaneously dissipates heat and cools themotor 25 and themotor controller 24, so as to ensure normal operation of themotor 25 and themotor controller 24.

Themotor controller 24 and themotor 25 are operated synchronously or not operated synchronously, so in each of the above cases, the operation of themotor 25 means that themotor controller 24 is operated simultaneously, and the non-operation of themotor 25 means that themotor controller 24 is not operated. In the above-mentioned various situations of duty ratio adjustment, the temperature T3 of themotor controller 24 when themotor controller 24 works is also taken into consideration, and the highest value or the lowest value may be taken when a plurality of reference values are juxtaposed, which is not described herein again.

It should be noted that, in order to obtain the water temperature T1 of theengine 12, the temperature T2 of themotor 25, the temperature T3 of themotor controller 24 and the pressure value P of thecondenser 33, in the present embodiment, temperature sensors are respectively disposed on the high temperatureheat dissipation pipeline 11 downstream of theengine 12, the low temperatureheat dissipation pipeline 21 downstream of themotor 25 and the low temperatureheat dissipation pipeline 21 downstream of themotor controller 24, pressure sensors (not shown in the figure) are disposed on the air-conditioning refrigeration pipeline 31 downstream of thecondenser 33, T1, T2 and T3 are obtained by the corresponding temperature sensors, and P is obtained by the pressure sensors.

The embodiment also discloses a hybrid vehicle which comprises the hybrid vehicle thermal management system and has the advantages of compact structure, space occupation reduction, low cost and good economy.

In conclusion, the invention has the advantages that: the low-temperature radiator 22, thecondenser 33, theintercooler 93 and the high-temperature radiator 14 are integrated together for arrangement, so that the system structure is simplified, the compactness is good, and the space occupation is small; the four electronic fan systems share one set ofelectronic fan system 4 for heat dissipation, and the three electronic fan sets 41 can be selectively started, so that the system structure is further simplified, the heat dissipation cost is reduced, and the economical efficiency is good; the high-temperature heat dissipation system 1, the air-conditioning heating loop 5 and the battery heating loop 6 are integrally connected, and the air-conditioning refrigeration loop 3 and thebattery refrigeration loop 7 are integrally connected, so that the system is further compact in structural arrangement, the arrangement of theheat exchanger 62 is reduced, the heat dissipation cost is reduced, the heat of hot water of theengine 12 is fully utilized, and the heat energy recycling is realized.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (14)

1. A hybrid vehicle thermal management system, comprising:

the high-temperature heat dissipation system (1) comprises an engine (12), a thermostat (13), a high-temperature radiator (14) and a first water pump (15), wherein the engine, the thermostat, the high-temperature radiator and the first water pump are connected through a high-temperature heat dissipation pipeline (11) to form a closed loop;

the low-temperature heat dissipation system (2) comprises a low-temperature radiator (22), a second water pump (23) and a motor (25), wherein the low-temperature radiator (22), the second water pump and the motor are connected through a low-temperature heat dissipation pipeline (21) to form a closed loop, and the low-temperature radiator (22) is arranged on one side of the high-temperature radiator (14);

the air conditioning system comprises an air conditioning refrigeration circuit (3), wherein the air conditioning refrigeration circuit (3) comprises a compressor (32), a condenser (33), a first stop valve (34), a thermostatic expansion valve (35) and an evaporator (36) which are connected through an air conditioning refrigeration pipeline (31) to form a closed loop, and the condenser (33) is arranged on one side of the high-temperature radiator (14) and is positioned on the same side as the low-temperature radiator (22);

the electronic fan system (4) comprises a plurality of electronic fan sets (41) which are distributed side by side and can be selectively started, wherein the electronic fan sets (41) are arranged opposite to the condenser (33), the high-temperature radiator (14) and the low-temperature radiator (22).

2. Hybrid vehicle thermal management system according to claim 1, characterized in that said electronic fan sets (41) are provided in three, two of said electronic fan sets (41) being arranged opposite said condenser (33) and said high-temperature radiator (14), the other one of said electronic fan sets (41) being arranged opposite said low-temperature radiator (22) and said high-temperature radiator (14).

3. Hybrid vehicle thermal management system according to claim 1, characterized in that the low-temperature radiator system (2) further comprises an electric motor controller (24) connected in the low-temperature radiator line (21), the electric motor controller (24) being located between the second water pump (23) and the electric motor (25).

4. Hybrid vehicle thermal management system according to any of claims 1 to 3, characterized in that it further comprises an air-conditioning and heating circuit (5), said air-conditioning and heating circuit (5) comprising:

an air-conditioning heating pipeline (51), one end of the air-conditioning heating pipeline (51) is communicated with the high-temperature heat dissipation pipeline (11) between the engine (12) and the thermostat (13), and the other end of the air-conditioning heating pipeline (51) is communicated with the high-temperature heat dissipation pipeline (11) between the first water pump (15) and the high-temperature radiator (14);

a warm air core (52) connected to the air conditioning heating pipeline (51);

and the second stop valve (53) is arranged on the air conditioner heating pipeline (51), and the second stop valve (53) is positioned at the upstream of the warm air core body (52).

5. Hybrid vehicle thermal management system according to claim 4, further comprising a battery thermal management system comprising a battery heating circuit (6) and a battery cooling circuit (7), the battery heating circuit (6) being adapted to heat a battery pack (82), the battery cooling circuit (7) being adapted to cool the battery pack (82).

6. Hybrid vehicle thermal management system according to claim 5, characterized in that said battery heating circuit (6) comprises:

a battery heating pipeline (61), one end of which is communicated with the air conditioner heating pipeline (51) at the upstream of the second stop valve (53), and the other end of the battery heating pipeline (61) is communicated with the air conditioner heating pipeline (51) at the downstream of the hot air core machine;

a heat exchanger (62) disposed in the battery heating line (61);

a third shut-off valve (63) disposed in the battery heating conduit (61) upstream of the heat exchanger (62).

7. Hybrid vehicle thermal management system according to claim 6, characterized in that said battery refrigeration circuit (7) comprises:

a battery cooling line (71) having one end communicating with the air-conditioning cooling line (31) between the first cut-off valve (34) and the condenser (33), the other end of the battery cooling line (71) communicating with the air-conditioning cooling line (31) between the evaporator (36) and the compressor (32), the battery heating line (61) having the heat exchanger (62) connected therein;

an electronic expansion valve (72) disposed in the battery refrigeration line (71) upstream of the heat exchanger (62).

8. The hybrid vehicle thermal management system of claim 7, wherein the battery thermal management system further comprises a battery self-circulation loop (8), the battery self-circulation loop (8) comprising:

one end of the battery self-circulation pipeline (81) is connected with the circulation outlet of the heat exchanger (62), and the other end of the battery self-circulation pipeline (81) is connected with the circulation inlet of the heat exchanger (62);

the battery pack (82) is arranged in the battery self-circulation pipeline (81);

and a third water pump (83) disposed in the battery self-circulation pipeline (81) and located downstream of the battery pack (82).

9. The hybrid vehicle thermal management system of any of claims 1-3, further comprising a supercharger heat-removal system (9), the supercharger heat-removal system (9) comprising:

a supercharger heat dissipation pipeline (91) which is a closed loop circulation pipeline;

a turbocharger (92) disposed in the supercharger heat sink conduit (91);

and the intercooler (93) is arranged in the supercharger heat dissipation pipeline (91) to cool the turbocharger (92).

10. Hybrid vehicle thermal management system according to claim 9, characterized in that the intercooler (93) is arranged between the high-temperature radiator (14) and the condenser (33), and in that the intercooler (93) is distributed alongside the low-temperature radiator (22).

11. A control method of a hybrid vehicle thermal management system according to any of claims 1 to 10, characterized in that one or more of the electronic fan sets (41) is selectively activated depending on the operation of the condenser (33), the low temperature radiator (22) and the high temperature radiator (14).

12. The control method of a hybrid vehicle thermal management system according to claim 11, characterized in that said electronic fan sets (41) are provided in three, two of said electronic fan sets (41) being disposed opposite said condenser (33) and said high-temperature radiator (14), the other of said electronic fan sets (41) being disposed opposite said low-temperature radiator (22) and said high-temperature radiator (14);

the selectively starting one or more electronic fan sets (41) according to the working conditions of the condenser (33), the low-temperature radiator (22) and the high-temperature radiator (14) specifically comprises the following steps:

when the engine (12) works, the condenser (33) and the motor (25) do not work; or when the engine (12) and the electric machine (25) are both on, the condenser (33) is not on; or when the engine (12), the condenser (33) and the electric machine (25) are all operating; or when the engine (12) does not work and the condenser (33) and the motor (25) work, all the three electronic fan sets (41) are started;

when the engine (12) and the condenser (33) are both operated and the motor (25) is not operated, both the electronic fan sets (41) opposite to the high-temperature radiator (14) and the condenser (33) are turned on;

when the engine (12) and the condenser (33) do not work and the motor (25) works, the electronic fan set (41) arranged opposite to the low-temperature radiator (22) is started.

13. The control method of a hybrid vehicle thermal management system according to claim 12, wherein when the engine (12) is on and the condenser (33) and the electric machine (25) are not on, then the method further comprises, after three of the electronic fan sets (41) are turned on: the duty ratios of the three electronic fan sets (41) can be adjusted according to the water temperature T1 of the engine;

when the engine (12) and the motor (25) are both operated and the condenser (33) is not operated, the method further comprises the following steps after the three electronic fan sets (41) are all started: the three electronic fan sets (41) can adjust duty ratios according to the water temperature T1 of the engine and the temperature T2 of the motor;

when the engine (12) and the condenser (33) are both operated and the motor (25) is not operated, the method further comprises, after both the two electronic fan sets (41) opposite to the engine (12) and the condenser (33) are turned on: the two electronic fan sets (41) can carry out duty ratio adjustment according to the water temperature T1 of the engine and the pressure value P of the condenser;

when the engine (12) and the condenser (33) are not operated and the motor (25) is operated, the method further comprises the following steps after the electronic fan set (41) opposite to the low-temperature radiator (22) is turned on: the electronic fan set (41) can adjust the duty ratio according to the motor temperature T2;

when the engine (12) is not operated, and the condenser (33) and the motor (25) are both operated, the method further comprises the following steps after all three electronic fan sets (41) are turned on: the two electronic fan sets (41) opposite to the condenser (33) can adjust the duty ratio according to the condenser pressure value P, and the electronic fan set (41) opposite to the low-temperature radiator (22) can adjust the duty ratio according to the motor temperature T2;

when the engine (12), the condenser (33) and the motor (25) are all operated, the three electronic fan sets (41) further comprise, after being turned on: the three electronic fan sets (41) can adjust duty ratios according to the temperature T1 of the engine water, the temperature T2 of the motor and the pressure value P of the condenser.

14. Hybrid vehicle, characterized in that it comprises a hybrid vehicle thermal management system according to any one of claims 1 to 10.

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