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CN116552197A - Hybrid electric vehicle thermal management system and control method thereof - Google Patents

Hybrid electric vehicle thermal management system and control method thereof
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CN116552197A
CN116552197ACN202310606103.1ACN202310606103ACN116552197ACN 116552197 ACN116552197 ACN 116552197ACN 202310606103 ACN202310606103 ACN 202310606103ACN 116552197 ACN116552197 ACN 116552197A
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battery pack
control method
mechanical compressor
refrigerant
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李宏
刘华勇
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Abstract

Translated fromChinese

本发明涉及一种混动汽车热管理,公开了一种混动汽车热管理系统及其控制方法,其包括机械压缩机,机械压缩机连接冷凝器和chiller,还包括蒸发器和冷媒电磁阀以及与chiller连接的电子膨胀阀,还包括与chiller连接的暖风芯体和水阀,Chiller还与电子水泵连接,电子水泵与电池包连接。本发明提供一种基于机械压缩机制冷和发动机余热制热的混动汽车热管理系统及控制方法,实现低成本的新能源商用车热管理系统安全运行,满足热管理需求。

The invention relates to thermal management of a hybrid vehicle, and discloses a thermal management system of a hybrid vehicle and a control method thereof, which includes a mechanical compressor connected to a condenser and a chiller, an evaporator, a refrigerant solenoid valve and The electronic expansion valve connected to the chiller also includes a heater core and a water valve connected to the chiller, the chiller is also connected to the electronic water pump, and the electronic water pump is connected to the battery pack. The present invention provides a hybrid vehicle thermal management system and control method based on mechanical compressor refrigeration and engine waste heat heating, so as to realize the safe operation of the low-cost new energy commercial vehicle thermal management system and meet the thermal management requirements.

Description

Translated fromChinese
一种混动汽车热管理系统及其控制方法Thermal management system and control method for a hybrid vehicle

技术领域technical field

本发明涉及一种混动汽车热管理,尤其涉及了一种混动汽车热管理系统及其控制方法。The invention relates to thermal management of a hybrid vehicle, in particular to a thermal management system and a control method for a hybrid vehicle.

背景技术Background technique

新能源汽车一般包括纯电动汽车和混动汽车,其中商用车在新能源方面的产品还是以混动产品居多,这是由于商用车重载耗电量大的特性决定的。New energy vehicles generally include pure electric vehicles and hybrid vehicles. Among them, commercial vehicles are mostly hybrid products in terms of new energy products, which is determined by the characteristics of heavy-duty power consumption of commercial vehicles.

目前商用混动汽车在热管理控制方面一般采用PTC加热器与发动机余热给乘员舱和电池包进行加热,采用电动压缩机给乘员舱和电池包降温,然而PTC加热器和电动压缩机为高成本件,从而使得整车制造成本高,缺少产品竞争力且利润空间低。At present, commercial hybrid vehicles generally use PTC heaters and engine waste heat to heat the passenger compartment and battery pack in terms of thermal management control, and use electric compressors to cool the passenger compartment and battery packs. However, PTC heaters and electric compressors are expensive. Parts, resulting in high vehicle manufacturing costs, lack of product competitiveness and low profit margins.

发明内容Contents of the invention

本发明针对现有技术中混动汽车热管理存在的问题,提供了一种混动汽车热管理系统及控制方法。The present invention provides a heat management system and a control method for a hybrid vehicle aiming at the problems existing in the thermal management of the hybrid vehicle in the prior art.

为了解决上述技术问题,本发明通过下述技术方案得以解决:In order to solve the above technical problems, the present invention is solved through the following technical solutions:

一种混动汽车热管理系统,包括发动机,还包括与发动机连接的机械压缩机,机械压缩机通过管路A和管路B分别连接冷凝器和chiller,管路B上并联连接有两根第一分支管,其中一根第一分支的出水口端与chiller连接,另一根第一分支管上依次连接蒸发器和冷媒电磁阀,管路A和所述另一根第一分支管出水端连通且通过一电子膨胀阀与所述chiller连接;A thermal management system for a hybrid vehicle, including an engine and a mechanical compressor connected to the engine. The mechanical compressor is respectively connected to the condenser and the chiller through a pipeline A and a pipeline B. The pipeline B is connected in parallel with two first One branch pipe, the water outlet end of one of the first branches is connected to the chiller, the other first branch pipe is connected to the evaporator and the refrigerant solenoid valve in sequence, and the pipeline A and the water outlet end of the other first branch pipe communicated and connected with the chiller through an electronic expansion valve;

发动机上还连接有管路D和管路E,管路D上并联连接有两根第二分支管,两第二分支管上分别设有暖风芯体和水阀,管路E的出水终端与管路D的两第二分支管出水终端连通且均与所述chiller连接;The engine is also connected with a pipeline D and a pipeline E. Two second branch pipes are connected in parallel on the pipeline D. The two second branch pipes are respectively provided with a warm air core and a water valve. The water outlet terminal of the pipeline E It communicates with the water outlet terminals of the two second branch pipes of the pipeline D and is connected with the chiller;

所述Chiller还通过水管与电子水泵连接,电子水泵通过水管与电池包连接。The Chiller is also connected to the electronic water pump through the water pipe, and the electronic water pump is connected to the battery pack through the water pipe.

作为优选,冷凝器处固定有与机械压缩机同步工作的电子风扇。Preferably, an electronic fan that works synchronously with the mechanical compressor is fixed at the condenser.

一种混动汽车热管理系统的控制方法,包括乘员舱制冷控制方法:A control method for a thermal management system of a hybrid vehicle, including a cooling control method for a passenger compartment:

仅乘员舱有制冷需求时,开启电子水泵且请求发动机开启,动机开启后机械压缩机的电磁离合器吸合,然后冷媒电磁阀开启,电子膨胀阀关闭;只有当发动机开启后才允许吸合机械压缩机的电磁离合器,防止发动机带载启动。Only when the passenger compartment has a cooling demand, turn on the electronic water pump and request the engine to start. After the engine is turned on, the electromagnetic clutch of the mechanical compressor is engaged, then the refrigerant solenoid valve is turned on, and the electronic expansion valve is turned off; only when the engine is turned on is it allowed to engage the mechanical compressor The electromagnetic clutch of the engine prevents the engine from starting under load.

此时冷媒走向是冷媒通过机械压缩机流向冷凝器,冷媒通过冷凝器后经冷媒电磁阀对蒸发器进行换热后流入机械压缩机。At this time, the direction of the refrigerant is that the refrigerant flows to the condenser through the mechanical compressor. After passing through the condenser, the refrigerant exchanges heat with the evaporator through the refrigerant solenoid valve and then flows into the mechanical compressor.

作为优选,包括电池包制冷控制方法:As a preference, it includes a battery pack refrigeration control method:

仅电池包有制冷需求时,电子水泵立即工作,如果当前冷却液温度低于请求水温温度,则无需启动机械压缩机,节约能耗;否则需要开启机械压缩机,且开启机械压缩机前需要先启动发动机,发动机启动后吸合机械压缩机的电磁离合器,然后关闭冷媒电磁阀,且电子风扇工作、电子膨胀阀开始PI调节,Only when the battery pack has cooling demand, the electronic water pump works immediately. If the current coolant temperature is lower than the requested water temperature, there is no need to start the mechanical compressor to save energy; otherwise, the mechanical compressor needs to be turned on, and the mechanical compressor needs to be turned on first Start the engine. After the engine starts, the electromagnetic clutch of the mechanical compressor is engaged, and then the refrigerant solenoid valve is closed, and the electronic fan works, and the electronic expansion valve starts PI adjustment.

此时冷媒走向是冷媒通过机械压缩机流向冷凝器,冷媒通过冷凝器后经电子膨胀阀流向chiller,对chiller进行换热后流入机械压缩机;At this time, the direction of the refrigerant is that the refrigerant flows to the condenser through the mechanical compressor, and the refrigerant flows to the chiller through the electronic expansion valve after passing through the condenser, and then flows into the mechanical compressor after exchanging heat with the chiller;

此时冷却液流向是冷却液通过水泵流向电池包,冷却液通过电池包后流向chiller,chiller对冷却液进行换热后流向电子水泵。At this time, the coolant flows to the battery pack through the water pump, and then flows to the chiller after passing through the battery pack. The chiller exchanges heat with the coolant and then flows to the electronic water pump.

作为优选,同时包括乘员舱制冷控制方法和电池包制冷控制方法:Preferably, the passenger compartment cooling control method and the battery pack cooling control method are included:

当电池包与乘员舱同时有降温请求时,电子水泵立即工作,发动机启动后机械压缩机工作,冷媒电磁阀开启,电子膨胀阀进行PI开度调节、电子风扇工作;When the battery pack and the passenger compartment have a cooling request at the same time, the electronic water pump works immediately, the mechanical compressor works after the engine starts, the refrigerant solenoid valve opens, the electronic expansion valve performs PI opening adjustment, and the electronic fan works;

此时冷媒走向是一方面冷媒通过机械压缩机流向冷凝器,冷媒通过冷凝器后经电子膨胀阀流向chiller,对chiller进行换热后流入机械压缩机,同时另一方面冷媒通过机械压缩机流向冷凝器,冷媒通过冷凝器后经冷媒电磁阀对蒸发器进行换热后流入机械压缩机;At this time, the direction of the refrigerant is that on the one hand, the refrigerant flows to the condenser through the mechanical compressor. After passing through the condenser, the refrigerant flows to the chiller through the electronic expansion valve. After exchanging heat with the chiller, it flows into the mechanical compressor. The refrigerant passes through the condenser and then flows into the mechanical compressor through the refrigerant solenoid valve to exchange heat for the evaporator;

此时冷却液流向是冷却液通过水泵流向电池包,冷却液通过电池包后流向chiller,chiller对冷却液进行换热后流向电子水泵。At this time, the coolant flows to the battery pack through the water pump, and then flows to the chiller after passing through the battery pack. The chiller exchanges heat with the coolant and then flows to the electronic water pump.

作为优选,包括乘员舱制热控制方法:Preferably, the heating control method for the passenger compartment is included:

当仅乘员舱有制热需求时,水阀保持关闭,只需请求发动机开启,此时冷媒和冷却水均不流动。When only the passenger compartment has a heating demand, the water valve remains closed, and only the engine is required to be turned on. At this time, neither the refrigerant nor the cooling water flows.

作为优选,包括电池包制热控制方法:As a preference, it includes a battery pack heating control method:

当仅电池包有制热需求时,请求发动机开启,发动机开启后,水温大于T1℃时水阀打开,水温大于T2℃时水泵工作;当电池包进水温度大于T3℃时,关闭水阀,可以防止在电池包进水瞬间,水温过低,导致电池包内部水温不升反降。When only the battery pack has a heating demand, request the engine to start. After the engine is started, the water valve will open when the water temperature is higher than T1°C, and the water pump will work when the water temperature is higher than T2°C; when the temperature of the water entering the battery pack is higher than T3°C, close the water valve It can prevent the water temperature from being too low when the battery pack is flooded with water, causing the water temperature inside the battery pack to drop instead of rising.

作为优选,同时包括乘员舱制热控制方法和电池包制热控制方法:As a preference, it also includes the passenger compartment heating control method and the battery pack heating control method:

当电池包与乘员舱同时有制热需求时,通过进行出风模式判断,进行水阀开启的控制,如果出风模式为除霜模式,则电池包水路需要延后开启。优先保证乘员舱除霜效果,防止行车时发生起雾引发安全事故。When the battery pack and the passenger compartment have heating needs at the same time, the air outlet mode is judged to control the opening of the water valve. If the air outlet mode is the defrosting mode, the water channel of the battery pack needs to be opened after a delay. Prioritize the defrosting effect of the passenger compartment to prevent safety accidents caused by fogging while driving.

如出风模式非除霜模式,则请求发动机开启,发动机开启后,水温大于T1℃时水阀打开,水温大于T2℃时水泵工作;当电池包进水温度大于T3℃时,关闭水阀。If the air outlet mode is not defrosting mode, the engine is requested to be turned on. After the engine is turned on, the water valve opens when the water temperature is higher than T1°C, and the water pump works when the water temperature is higher than T2°C; when the temperature of the water entering the battery pack is higher than T3°C, the water valve is closed.

本发明由于采用了以上技术方案,具有显著的技术效果:The present invention has remarkable technical effect owing to adopted above technical scheme:

本发明提供一种基于机械压缩机制冷和发动机余热制热的混动汽车热管理系统及控制方法,实现低成本的新能源商用车热管理系统安全运行,满足热管理需求。The present invention provides a hybrid vehicle thermal management system and control method based on mechanical compressor refrigeration and engine waste heat heating, so as to realize the safe operation of the low-cost new energy commercial vehicle thermal management system and meet the thermal management requirements.

附图说明Description of drawings

图1是本发明混动汽车热管理系统的结构框图。Fig. 1 is a structural block diagram of a thermal management system for a hybrid vehicle of the present invention.

图2是本发明混动汽车热管理系统的降温流程图。Fig. 2 is a cooling flow chart of the thermal management system of the hybrid vehicle of the present invention.

图3是本发明混动汽车热管理系统的加热流程图。Fig. 3 is a heating flow chart of the hybrid vehicle thermal management system of the present invention.

具体实施方式Detailed ways

下面结合附图与实施例对本发明作进一步详细描述。The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

实施例1Example 1

如图1-图3所示,一种混动汽车热管理系统,包括发动机,还包括与发动机连接的机械压缩机,机械压缩机通过管路A1和管路B2分别连接冷凝器和chiller,chiller即板式换热器;As shown in Figures 1-3, a heat management system for a hybrid vehicle includes an engine and a mechanical compressor connected to the engine. The mechanical compressor is connected to the condenser and the chiller through the pipeline A1 and the pipeline B2, respectively. Namely plate heat exchanger;

管路B2上并联连接有两根第一分支管201,其中一根第一分支的出水口端与chiller连接,另一根第一分支管201上依次连接蒸发器和冷媒电磁阀,管路A1和所述另一根第一分支管201出水端连通且通过一电子膨胀阀与所述chiller连接;There are two first branch pipes 201 connected in parallel on the pipeline B2, the water outlet end of one of the first branches is connected to the chiller, and the other first branch pipe 201 is connected to the evaporator and the refrigerant solenoid valve in sequence, and the pipeline A1 communicate with the water outlet of the other first branch pipe 201 and connect with the chiller through an electronic expansion valve;

发动机上还连接有管路D4和管路E5,管路D4上并联连接有两根第二分支管401,两第二分支管401上分别设有暖风芯体和水阀,管路E5的出水终端与管路D4的两第二分支管401出水终端连通且均与所述chiller连接;The engine is also connected with a pipeline D4 and a pipeline E5, and the pipeline D4 is connected in parallel with two second branch pipes 401, and the two second branch pipes 401 are respectively provided with a warm air core and a water valve. The water outlet terminal communicates with the water outlet terminals of the two second branch pipes 401 of the pipeline D4 and is connected to the chiller;

所述Chiller还通过水管与电子水泵连接,电子水泵通过水管与电池包连接。The Chiller is also connected to the electronic water pump through the water pipe, and the electronic water pump is connected to the battery pack through the water pipe.

本实施例中冷凝器处固定有与机械压缩机同步工作的电子风扇,其中电子风扇与冷凝器集成在一起,电子风扇与机械压缩机同步工作,实现机械压缩机工作时,同步控制电子风扇工作。In this embodiment, an electronic fan that works synchronously with the mechanical compressor is fixed at the condenser, wherein the electronic fan is integrated with the condenser, and the electronic fan and the mechanical compressor work synchronously, so that when the mechanical compressor is working, the electronic fan is controlled synchronously. .

本实施例中提供了一种混动汽车热管理系统的控制方法,其包括以下几种控制方法,具体为:This embodiment provides a control method for a thermal management system of a hybrid vehicle, which includes the following control methods, specifically:

一、仅乘员舱制冷控制方法:1. Only the passenger compartment refrigeration control method:

仅乘员舱有制冷需求时,开启电子水泵且请求发动机开启,动机开启后机械压缩机的电磁离合器吸合,然后冷媒电磁阀开启,电子膨胀阀关闭;When there is cooling demand only in the passenger compartment, the electronic water pump is turned on and the engine is requested to be turned on. After the engine is turned on, the electromagnetic clutch of the mechanical compressor is engaged, then the refrigerant solenoid valve is turned on, and the electronic expansion valve is closed;

此时冷媒走向是冷媒通过机械压缩机流向冷凝器,冷媒通过冷凝器后经冷媒电磁阀对蒸发器进行换热后流入机械压缩机。At this time, the direction of the refrigerant is that the refrigerant flows to the condenser through the mechanical compressor. After passing through the condenser, the refrigerant exchanges heat with the evaporator through the refrigerant solenoid valve and then flows into the mechanical compressor.

二、仅电池包制冷控制方法:2. Only battery pack refrigeration control method:

仅电池包有制冷需求时,电子水泵立即工作,如果当前冷却液温度低于请求水温温度,则无需启动机械压缩机,否则需要开启机械压缩机,且开启机械压缩机前需要先启动发动机,发动机启动后吸合机械压缩机的电磁离合器,然后关闭冷媒电磁阀,且电子风扇工作、电子膨胀阀开始PI调节,Only when the battery pack has a cooling demand, the electronic water pump works immediately. If the current coolant temperature is lower than the requested water temperature, there is no need to start the mechanical compressor. Otherwise, the mechanical compressor needs to be turned on, and the engine needs to be started before turning on the mechanical compressor. After starting, engage the electromagnetic clutch of the mechanical compressor, then close the refrigerant solenoid valve, and the electronic fan works, and the electronic expansion valve starts PI adjustment.

此时冷媒走向是冷媒通过机械压缩机流向冷凝器,冷媒通过冷凝器后经电子膨胀阀流向chiller,对chiller进行换热后流入机械压缩机;At this time, the direction of the refrigerant is that the refrigerant flows to the condenser through the mechanical compressor, and the refrigerant flows to the chiller through the electronic expansion valve after passing through the condenser, and then flows into the mechanical compressor after exchanging heat with the chiller;

此时冷却液流向是冷却液通过水泵流向电池包,冷却液通过电池包后流向chiller,chiller对冷却液进行换热后流向电子水泵。At this time, the coolant flows to the battery pack through the water pump, and then flows to the chiller after passing through the battery pack. The chiller exchanges heat with the coolant and then flows to the electronic water pump.

三、乘员舱和电池包同时制冷控制方法:3. Simultaneous cooling control method for the passenger compartment and battery pack:

当电池包与乘员舱同时有降温请求时,电子水泵立即工作,发动机启动后机械压缩机工作,冷媒电磁阀开启,电子膨胀阀进行PI开度调节、电子风扇工作;When the battery pack and the passenger compartment have a cooling request at the same time, the electronic water pump works immediately, the mechanical compressor works after the engine starts, the refrigerant solenoid valve opens, the electronic expansion valve performs PI opening adjustment, and the electronic fan works;

此时冷媒走向是一方面冷媒通过机械压缩机流向冷凝器,冷媒通过冷凝器后经电子膨胀阀流向chiller,对chiller进行换热后流入机械压缩机,同时另一方面冷媒通过机械压缩机流向冷凝器,冷媒通过冷凝器后经冷媒电磁阀对蒸发器进行换热后流入机械压缩机;At this time, the direction of the refrigerant is that on the one hand, the refrigerant flows to the condenser through the mechanical compressor. After passing through the condenser, the refrigerant flows to the chiller through the electronic expansion valve. After exchanging heat with the chiller, it flows into the mechanical compressor. The refrigerant passes through the condenser and then flows into the mechanical compressor through the refrigerant solenoid valve to exchange heat for the evaporator;

此时冷却液流向是冷却液通过水泵流向电池包,冷却液通过电池包后流向chiller,chiller对冷却液进行换热后流向电子水泵。At this time, the coolant flows to the battery pack through the water pump, and then flows to the chiller after passing through the battery pack. The chiller exchanges heat with the coolant and then flows to the electronic water pump.

上述制冷控制方法中,只有当发动机开启后才允许吸合机械压缩机的电磁离合器,防止发动机带载启动,并且当前冷却液温度低于请求水温温度,则无需启动压缩机,节约能耗。In the above refrigeration control method, the electromagnetic clutch of the mechanical compressor is allowed to engage only when the engine is started to prevent the engine from starting with load, and if the current coolant temperature is lower than the requested water temperature, there is no need to start the compressor, saving energy consumption.

四、仅乘员舱制热控制方法:4. Heating control method for passenger compartment only:

当仅乘员舱有制热需求时,水阀保持关闭,只需请求发动机开启,此时冷媒和冷却水均不流动。When only the passenger compartment has a heating demand, the water valve remains closed, and only the engine is required to be turned on. At this time, neither the refrigerant nor the cooling water flows.

五、仅电池包制热控制方法:5. Only battery pack heating control method:

当仅电池包有制热需求时,请求发动机开启,发动机开启后,水温大于T1℃时水阀打开,水温大于T2℃时水泵工作,可以防止在电池包进水瞬间,水温过低,导致电池包内部水温不升反降;When only the battery pack has a heating demand, request the engine to start. After the engine is started, the water valve will open when the water temperature is greater than T1°C, and the water pump will work when the water temperature is greater than T2°C. The water temperature inside the bag does not rise but falls;

当电池包进水温度大于T3℃时,关闭水阀,有效防止电池包内部水温过高,造成电池损坏。其中T1、T2、T3是通过标定获取,如本实施例中设定T1=25℃,T2=30℃,T3=40℃,When the temperature of the water entering the battery pack is higher than T3°C, close the water valve to effectively prevent the internal water temperature of the battery pack from being too high and causing damage to the battery. Among them, T1, T2, and T3 are obtained through calibration, such as setting T1=25°C, T2=30°C, T3=40°C in this embodiment,

T1和T2的设置能够保证在冬季开启电池包加热时,进入电池包的水温度不能比电池包内部的低,否则容易起到相反的效果,T3的设置能够防止电池包加热时温度超调。The settings of T1 and T2 can ensure that when the battery pack is heated in winter, the temperature of the water entering the battery pack cannot be lower than that inside the battery pack, otherwise it will easily have the opposite effect. The setting of T3 can prevent the temperature from overshooting when the battery pack is heated.

六、乘员舱和电池包同时制热控制方法:6. Simultaneous heating control method for the passenger compartment and battery pack:

当电池包与乘员舱同时有制热需求时,通过进行出风模式判断,进行水阀开启的控制,如果出风模式为除霜模式,则电池包水路需要延后开启,以优先保证除霜需求,以保证乘员舱除霜效果,防止行车时发生起雾引发安全事故,每次进入除霜模式单独计时,延时时间可根据常规除霜经验时间设定。When the battery pack and the passenger compartment have heating needs at the same time, the air outlet mode is judged to control the opening of the water valve. If the air outlet mode is the defrosting mode, the water channel of the battery pack needs to be opened later to ensure defrosting first. In order to ensure the defrosting effect of the passenger compartment and prevent safety accidents caused by fogging when driving, each time entering the defrosting mode is timed separately, and the delay time can be set according to the conventional defrosting experience time.

如出风模式非除霜模式,则请求发动机开启,发动机开启后,水温大于T1℃时水阀打开,水温大于T2℃时水泵工作;当电池包进水温度大于T3℃时,关闭水阀。If the air outlet mode is not defrosting mode, the engine is requested to be turned on. After the engine is turned on, the water valve opens when the water temperature is higher than T1°C, and the water pump works when the water temperature is higher than T2°C; when the temperature of the water entering the battery pack is higher than T3°C, the water valve is closed.

本实施例中的混动汽车热管理系统利用发动机的余热实现电池包与乘员舱的加热和采暖,利用机械压缩机实现电池包与乘员舱的降温,避免使用PTC加热器和电动压缩机等高成本部件,继而降低整车制造成本,提高产品竞争力和利润空间。The hybrid vehicle thermal management system in this embodiment uses the waste heat of the engine to heat and heat the battery pack and the passenger compartment, uses a mechanical compressor to cool the battery pack and the passenger compartment, and avoids the use of PTC heaters and electric compressors. Cost components, and then reduce vehicle manufacturing costs, improve product competitiveness and profit margins.

容易理解的是,本领域技术人员在本申请提供的一个或几个实施例基础上,可以对本申请的实施例进行结合、拆分、重组等得到其他实施例,这些实施例均没有超出本申请的保护范围。It is easy to understand that, on the basis of one or several embodiments provided by this application, those skilled in the art can combine, split, reorganize, etc. the embodiments of this application to obtain other embodiments, and these embodiments do not exceed the scope of this application. scope of protection.

总之,以上所述仅为本发明的较佳实施例,凡依本发明申请专利范围所作的均等变化与修饰,皆应属本发明专利的涵盖范围。In a word, the above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the patent of the present invention.

Claims (8)

1. The utility model provides a hybrid vehicle thermal management system, includes the engine, its characterized in that: the system comprises a condenser, a pipe B (2), a first branch pipe (201), an evaporator, a refrigerant electromagnetic valve, an electronic expansion valve, a second branch pipe (201), a condenser and a compressor, wherein the mechanical compressor is connected with the engine, the condenser and the compressor are respectively connected with the mechanical compressor through the pipe A (1) and the pipe B (2), the pipe B (2) is connected with the two first branch pipes in parallel, the water outlet end of one first branch pipe is connected with the compressor, the evaporator and the refrigerant electromagnetic valve are sequentially connected with the other first branch pipe (201), and the pipe A (1) is communicated with the water outlet end of the other first branch pipe (201) and is connected with the compressor through the electronic expansion valve;
when the battery pack and the passenger cabin have a cooling request at the same time, the electronic water pump immediately works, the mechanical compressor works after the engine is started, the refrigerant electromagnetic valve is opened, and the electronic expansion valve adjusts PI opening and the electronic fan works; at the moment, the direction of the refrigerant flows to the condenser through the mechanical compressor, the refrigerant flows to the pipe through the electronic expansion valve after passing through the condenser, the refrigerant flows into the mechanical compressor after exchanging heat with the pipe, meanwhile, the refrigerant flows to the condenser through the mechanical compressor, and the refrigerant flows into the mechanical compressor after passing through the condenser and exchanging heat with the evaporator through the refrigerant electromagnetic valve;
CN202310606103.1A2023-05-262023-05-26Hybrid electric vehicle thermal management system and control method thereofPendingCN116552197A (en)

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* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
CN111231655A (en)*2018-11-292020-06-05比亚迪股份有限公司 Vehicle thermal management system and control method thereof, and vehicle
CN111993884A (en)*2020-08-252020-11-27一汽解放青岛汽车有限公司Hybrid vehicle thermal management system and hybrid vehicle thermal management method
CN215284271U (en)*2021-07-212021-12-24苏州绿控传动科技股份有限公司New energy hybrid vehicle type cab and power battery integrated thermal management system
CN114571949A (en)*2022-01-252022-06-03江苏开沃汽车有限公司Thermal management system for heating series control of passenger compartment of hybrid electric vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
CN111231655A (en)*2018-11-292020-06-05比亚迪股份有限公司 Vehicle thermal management system and control method thereof, and vehicle
CN111993884A (en)*2020-08-252020-11-27一汽解放青岛汽车有限公司Hybrid vehicle thermal management system and hybrid vehicle thermal management method
CN215284271U (en)*2021-07-212021-12-24苏州绿控传动科技股份有限公司New energy hybrid vehicle type cab and power battery integrated thermal management system
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