CN203218402U - Vehicle Power Battery System and Electric Vehicle - Google Patents

Abstract

The utility model provides a vehicle power battery system and an electric vehicle, and aims at solving the problems that the vehicle power battery system in the prior art can not completely adapt to various possible conditions, the battery is damaged due to low temperature charging, and the service life of the battery is shortened. The vehicle power battery system comprises a lithium ion battery pack, a heating device, a battery management system, a heating mode selecting device and a charging device, wherein the heating mode selecting device is arranged between the heating device, the lithium ion battery pack and the charging device, and controlled by the battery management system, is used for switching between electric connection of the heating device and the lithium ion battery pack and electric connection of the heating device and the charging device. The vehicle power battery system provided by the utility model has the beneficial effects that various possible environmental conditions can be effectively dealt with, the phenomena that the battery is damaged due to low temperature charging and the service life of the battery is shortened are prevented, and the battery charging process at appropriate environment temperature is ensured.

Description

Vehicular dynamic battery system and electric automobile

Technical field

The utility model relates to a kind of electrokinetic cell system, especially refers to include the electrokinetic cell system of heater.

Background technology

At present, because the continuous exhaustion of resource such as oil, and environment is caused harmful effect during its burning, made people think deeply the energy supply mode of vehicle again, sought the clean energy resource of gasoline replacing, such as adopting the battery module power supply.Existing various types of electrokinetic cells occur at present, such as lithium-ion-power cell, lead-acid power accumulator, nickel power battery, fuel cell etc., particularly lithium-ion-power cell owing to its specific energy and specific power advantages of higher, has been widely used in the various electric motor cars.

Lithium ion battery still has a part difficult problem to fail thoroughly to solve as the attention that research and development and the commercialization of Vehicular dynamic battery has been subjected to increasing battery producer and auto vendor at present.Plug-in electromobile particularly, it can adopt the external charge power supply to charge, and simultaneously, in the vehicle driving process, also the energy that reclaims of the unnecessary electric weight that generator in the vehicle driving process can be produced or brake be stored to the lithium ion battery group.If the process that the external charge power supply charges, perhaps vehicle in the process of moving, battery is under the low-temperature condition and charges, charge such as being lower than under 0 ℃, because lithium ion battery generally adopts graphite or hard carbon as negative pole, (electric current is greater than 0.2C in (below 0 ℃) charging under the low temperature, C is abbreviation, represent a kind of electric current, equal the nominal capacity of battery on its numerical value, 1C namely represent 1 hour can be with battery emptying, 0.2C represent 5 hours can be with battery emptying) bottleneck to be that lithium ion embeds the speed of negative pole slow excessively, negative pole can be analysed lithium, separating out of lithium metal will cause the battery capacity deterioration, and lithium metal dendrite also might puncture barrier film simultaneously, causes the potential safety hazard of internal short-circuit of battery.Thereby, for the electric automobile that adopts lithium-ion-power cell as power supplying apparatus, because the charge efficiency of battery is low under the low temperature, if charging at low temperatures for a long time, then will cause permanent capacitance loss or damage to battery, reduce the useful life of battery, even bring potential safety hazard to electric automobile.Be subject to the low temperature charging performance of lithium ion battery, promote the low temperature charging ability from electric core angle at present, technical difficulty is bigger.Improve the battery charge efficient under the low temperature, mode is that battery is heated preferably, and being heated to charges after the suitable temperature again will effectively improve the charge efficiency of battery.At present, heating has some kinds of modes for battery, such as sending into hot blast with heating battery by the air-conditioning system of vehicle, perhaps adopts liquid medium that heat is passed to battery.

But the Vehicular dynamic battery system of prior art can not adapt to various possible situations fully at present, therefore still can not effectively solve in the low temperature charging process battery is caused damage, and reduces the battery problem in useful life.

The utility model content

The Vehicular dynamic battery system can not adapt to various possible situations fully in the prior art in order to solve, and causes the low temperature charging that battery is caused damage, and reduces the battery problem in useful life, and the utility model provides a kind of Vehicular dynamic battery system.

The disclosed Vehicular dynamic battery of the utility model embodiment system comprises lithium ion battery group, heater, battery management system, heating mode choice device, reaches charging device;

Charging device, heater and lithium ion battery group all are electrically connected by high-voltage line between any two;

The heating mode choice device is arranged between heater and the lithium ion battery group, between heater and the charging device and between lithium ion battery group and the charging device, controlled by battery management system, be used for the connecting and disconnecting of the circuit between realization heater and the lithium ion battery group, and the connecting and disconnecting of the circuit between heater and the charging device.

Adopt the disclosed Vehicular dynamic battery of the utility model embodiment system, owing to wherein be provided with the heating mode choice device, can before battery charge, heat, its heating can connect between lithium ion battery group and the external charge power supply dual mode in inside with power supply switches, can successfully manage the various environmental aspects that may occur, prevent that the low temperature charging from causing damage, reducing the battery situation generation in useful life to battery, guarantees that battery charging process carries out under suitable ambient temperature.Under the constant condition of existing car load high-voltage electrical apparatus framework, only improve the partial design in the battery system, can effectively solve the battery charge problem under low temperature environment.

Simultaneously, the utility model embodiment also provides a kind of electric automobile.

The electric automobile that the utility model embodiment provides comprises aforesaid Vehicular dynamic battery system, and whole-control system; Whole-control system is used for battery management system and the charging device of the described electrokinetic cell system of control.

Adopt the disclosed electric automobile of the utility model embodiment, its whole-control system can manage electrokinetic cell system, control, same owing in the Vehicular dynamic battery system, be provided with the heating mode choice device, can before battery charge, heat, its heating can connect between lithium ion battery group and the external charge power supply dual mode in inside with power supply switches, can successfully manage the various environmental aspects that may occur, prevent that the low temperature charging from causing damage to battery, reduce the battery situation generation in useful life, guarantee that battery charging process carries out under suitable ambient temperature.

Description of drawings

Fig. 1 is a kind of Vehicular dynamic battery system schematic that provides among the utility model embodiment;

Fig. 2 is the battery management system schematic diagram that provides among the utility model embodiment;

Fig. 3 is the another kind of Vehicular dynamic battery system schematic that provides among the utility model embodiment;

Fig. 4 is the electric automobile schematic diagram that provides among the utility model embodiment;

Fig. 5 is the third Vehicular dynamic battery system schematic that provides among the utility model embodiment;

Fig. 6 is the Vehicular dynamic battery system heating management flow chart that provides among the utility model embodiment;

Fig. 7 is the selection heating mode flow chart that provides among the utility model embodiment;

Fig. 8 is the Vehicular dynamic battery heating management refinement flow chart that provides during the utility model is implemented;

Wherein, 1, heater; 2, battery management system; 3, heating mode choice device; 4, high-voltage line; 5, lithium ion battery group; 6, charging device; 7, whole-control system; 61, charge power supply interface; 21, control module; 22, detection module; 221, temperature detecting module, 222, electric weight detection module, 223, charged state detection module; K1, heater switch; K2, charge switch; L, holding wire; 41, first line segment; 42, second line segment; 43, the 3rd line segment; K3, first heater switch; K4, second heater switch.

Embodiment

Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

For solving the problem of mentioning in the background technology, the utility model embodiment provides novel Vehicular dynamic battery system, the electric automobile with this novel automobile electrokinetic cell system and Vehicular dynamic battery system heating management method.

In the utility model embodiment, by in the Vehicular dynamic battery system heating mode choice device being set, the Vehicular dynamic battery system is being heated in the process of management, can conveniently between various heating modes, select, can successfully manage the various environmental aspects that may occur, prevent that the low temperature charging from causing damage, reducing the battery situation generation in useful life to battery, guarantees that battery charging process carries out under suitable ambient temperature.Below by specific embodiment the utility model is explained.

Embodiment 1

Be illustrated in fig. 1 shown below, this example provides a kind of Vehicular dynamic battery system, comprises lithium ion battery group 5, heater 1, battery management system 2, heating mode choice device 3, and charging device 6.

Charging device 6, heater 1 and lithium ion battery group 5 all are electrically connected by high-voltage line 4 between any two; What is called all is electrically connected by high-voltage line 4 between any two and refers to be electrically connected by high-voltage line between charging device 6 and the heater 1, be electrically connected by high-voltage line 4 between charging device 6 and the heater 1, and be electrically connected by high-voltage line between heater 1 and the lithium ion battery group 5.

The heating mode choice device is arranged between heater and lithium ion battery group, heater and charging device and lithium ion battery group and the charging device, controlled by battery management system, be used for realizing heater and the connecting and disconnecting of the circuit of lithium ion battery group and the connecting and disconnecting of the circuit of heater and charging device.

Lithium ion battery group 5 can adopt the technology of well known to a person skilled in the art, refers generally to then it is installed in the Battery case by single battery (or claiming cell, electric core etc.) is formed battery pack by serial or parallel connection.Battery case is such as the structure that can adopt lower casing, loam cake, and draws high-voltage line 4 from two electrodes of battery pack.High-voltage line 4 is mainly used to connect load or charging device 6 or connects heater 1, can electric energy be provided or by 5 chargings from charging device 6 to the lithium ion battery group of external charge power supply, perhaps provide electric energy by lithium ion battery group 5 to heater 1 to load by battery pack.

Battery management system 2(BATTERY MANAGEMENT SYSTEM, abbreviation BMS) is used for managing lithium ion battery group 5, be provided with some holding wire L, these holding wires L comprises collection cell voltage, electric current, the isoparametric sample line of temperature, and the control line that sends control signal.These control lines can be controlled the action of heater 1, charging device 6, all kinds of control switchs.

As shown in Figure 2, its battery management system 2 comprises detection module 22 and control module 21, and its detection module 22 detects battery information, feeds back to control module 21; Control module 21 control heater switch K1 and charge switch K2.Detection module 22 comprises temperature detecting module 221, electric weight detection module 222, reaches charged state detection module 223.This temperature detecting module 221 can detect the temperature in the lithium ion battery group 5, electric weight detection module 222 can detect electric current, the voltage in the lithium ion battery group 5, and then obtaining the information such as electric weight of battery, whether charged state detection module 223 can detect the external charge power supply.Because above-mentioned detection module 22, can detect the temperature, voltage of battery and the information of external charge power supply whether, can make rational judgement according to this, make in time, reasonably select from control module 21, the action of control charge switch K2 and heater switch K1, and send instruction for charging device 6.

Heater 1 is close to the battery container surface or is carried out heat exchange by other Heat Conduction Material transition are next with battery in this example.Certainly, also can select other modes to heat, as long as can heat battery.

Heating mode choice device 3 can be switch combination, switch can adopt realizations such as relay, contactor, its major loop connects heater 1 and lithium ion battery group 5, reaches charging device 6 by high-voltage line 4, and its control loop is connected to battery management system 2 by holding wire L.Its action is carried out the selection of heating mode according to the switching of switch, when being circumscribed with charge power supply, can select the pattern of external charge power supply to provide electric energy to heater 1 by heating mode choice device 3.When no external charge power supply, if having enough electric weight in the lithium ion battery group 5 when battery is heated to suitable temperature, the pattern that connects lithium ion battery group 5 in then can selecting provides electric energy to heater 1.If when electric weight were not enough to that battery is heated to suitable temperature in the lithium ion battery group 5, then heating mode choice device 3 can select to cut out switch combination, disconnect and being connected of charging device 6 and heater 1.

Charging device 6 can be built in the Battery case, also can place on the car load.Also charging device 6 can be arranged at outside the car load, when needs charge, this charging device 6 be connected with lithium ion battery group 5; Its charging device 6 is provided with the external charge interface, and this charging inlet can be connected to special-purpose charging pile, realizes heating and quick charge to battery, perhaps also can adopt or adopt simultaneously the charging connector of family expenses separately, realizes the heating of battery and charging at a slow speed.

Adopt the disclosed Vehicular dynamic battery of present embodiment system, owing to wherein be provided with heating mode choice device 3, can before battery charge, heat, its heating can connect between lithium ion battery group 5 and the external charge power supply dual mode in inside with power supply switches, can successfully manage the various environmental aspects that may occur, prevent that the low temperature charging from causing damage, reducing the battery situation generation in useful life to battery, guarantees that battery charging process carries out under suitable ambient temperature.Under the constant condition of existing car load high-voltage electrical apparatus framework, only improve the partial design in the battery system, can effectively solve the battery charge problem under low temperature environment.

Embodiment 2

The utility model embodiment also discloses a kind of heating mode choice device 3, as shown in Figure 3, comprises heater switch K1 and charge switch K2; Heater switch K1 is arranged on the high-voltage line 4 between heater 1 and charging device 6, heater 1 and the lithium ion battery group 5, is used for the connecting and disconnecting of the circuit between control heater 1 and charging device 6, heater 1 and the lithium ion battery group 5.Charge switch K2 is arranged on the high-voltage line 4 between lithium ion battery group 5 and charging device 6, lithium ion battery group 5 and the heater 1, is used between control lithium ion battery group 5 and the heater 1, the connecting and disconnecting of the circuit between lithium ion battery group 5 and the charging device 6.

Adopt two high-voltage lines of positive and negative terminal when usually high direct voltage connects, heater switch K1 in the present embodiment and charge switch K2 can be arranged on wherein on the high-voltage line.Concrete, charging device 6, heater 1 and lithium ion battery group 5 all are electrically connected by high-voltage line 4 between any two and comprise: charging device 6, heater 1 and lithium ion battery group 5 are electrically connected by two high-voltage lines 4 between any two respectively, and a high-voltage line connects anode, another high-voltage line connection negative terminal in two high-voltage lines 4.

A high-voltage line connects anode in so-called two high-voltage lines, another high-voltage line connects negative terminal and refers to: charging device 6 and heater 1 all just are being electrically connected to lithium ion battery group 5 respectively by two high-voltage lines 4, negative two ends, wherein the anode of charging device 6 and heater 1 all is electrically connected to the anode of lithium ion battery group 5 by high-voltage line 4, the negative terminal of charging device 6 and heater 1 all is electrically connected to the negative terminal of lithium ion battery group 5 by high-voltage line 4, and the anode of charging device 6 is connected to the anode of heater 1 by high-voltage line 4, and the negative terminal of charging device 6 is electrically connected to the negative terminal of heater by high-voltage line.

Heater switch K1 is arranged on the high-voltage line in two high-voltage lines 4 between charging device 6 and the heater 1; Charge switch K2 is arranged on the high-voltage line in two high-voltage lines between charging device 6 and the lithium ion battery group 5; Heater switch K1 and charge switch K2 series connection is arranged on the high-voltage line in two high-voltage lines between heater 1 and the lithium ion battery group 5.

As shown in Figure 3 and Figure 4, the radical of high-voltage line is 2, and every high-voltage line all can be divided into 3 sections, and 3 sections are connected on a bit, and heater 1, charging device 6, lithium ion battery group 5 are electrically connected.For simplicity, on every high-voltage line, for the purpose of convenient the description, to be called first line segment 41 with heater 1 direct-connected high pressure line segment, to be called second line segment 42 with lithium ion battery group 5 direct-connected high pressure line segments, will be called the 3rd line segment 43 with charging device 6 direct-connected high pressure line segments.With wherein second line segment, the 3rd line segment, first line segment of a high-voltage line are connected to the positive pole of described lithium ion battery group 5, the positive pole of charging device 6 and the positive pole of heater 1 respectively.Second line segment, the 3rd line segment, first line segment of another root high-voltage line is connected to the negative pole of lithium ion battery group 5, the negative pole of charging device 6 and the negative pole of heater 1 respectively.

On first line segment 41 of a high-voltage line 4 heater switch K1 is set therein, at second line segment charge switch K2 is set.

This example combines the advantage that lithium ion battery group 5 or charging device 6 provide two schemes of power supply.After the high-voltage line 4 of charging device 6 enters Battery case, be divided into two-way, the one tunnel to 5 chargings of lithium ion battery group, and its loop design has charge switch K2; One the tunnel gives heater 1 power supply, and its loop design has heater switch K1; Two switches are subjected to battery management system 2 controls.This programme is reasonable in design, implement simple, only this heater switch K1 and these two control switchs of charge switch K2 need be set, can be according to the combination of its control logic, has following function: provide suitable heating power supply to heater, if no suitable heating power supply, then battery management system can provide prompting.Whether control charging circuit to lithium ion cell charging by the break-make of charge switch.

Embodiment 3

On the basis of embodiment 1, this example has provided another kind of preferred heating mode choice device 3, and as shown in Figure 5, heating mode choice device 3 comprises the first heater switch K3, the second heater switch K4; The first heater switch K3 is arranged on the high-voltage line between heater 1 and the charging device 6, is used for the connecting and disconnecting of the circuit between control heater 1 and the charging device 6; The second heater switch K4 is arranged on the high-voltage line 4 between heater 1 and the lithium ion battery group 5, is used for the connecting and disconnecting of the circuit between control heater 1 and the lithium ion battery group 5.In addition, be provided with a charge switch K2 in this example, be used for charging to lithium ion battery group 5 by charging device 6, this charge switch K2 is arranged on the high-voltage line between lithium ion battery group 5 and the charging device 6, be used for the connecting and disconnecting of the circuit between control lithium ion battery group and the charging device, to determine whether to connect charging circuit.The first heater switch K3, the second heater switch K4, charge switch K3 all are subjected to the control of battery management system.

The electrokinetic cell system that adopts present embodiment to provide, whether the break-make that can directly control the first heater switch K3 is controlled and is adopted charging device to heat, whether the break-make that also can directly control the second heater switch K4 is controlled and is adopted the lithium ion battery group to heat, its scheme logic is clear, easy to implement.

Embodiment 4

Present embodiment is used for the disclosed electric automobile of explanation the utility model, as shown in Figure 4, it comprises previous embodiment disclosed Vehicular dynamic battery system and whole-control system 7, and whole-control system 7 is used for battery management system 2 and the charging device 6 of the described electrokinetic cell system of control.

Its whole-control system 7 is used for controlling the action of car load, comprise control battery management system 2, by battery management system 2 control charging device 6 and heating mode choice devices 3, the feedback information that battery management system 2 can be read is to whole-control system 7, simultaneously, the control command of whole-control system 7 can be sent to battery management system 2 carries out.This whole-control system 7 also can directly be controlled charging device 6, reads the state of charging device 6, sends instruction etc. for charging device 6.

The disclosed electric automobile of present embodiment, its whole-control system 7 can manage electrokinetic cell system, control, same owing in the Vehicular dynamic battery system, be provided with heating mode choice device 3, therefore can before battery charge, heat battery, its heating can connect between lithium ion battery group 5 and the external charge power supply dual mode in inside with power supply to be selected, can successfully manage the various environmental aspects that may occur, prevent that the low temperature charging from causing damage to battery, reduce the battery situation generation in useful life, guarantee that battery charging process carries out under suitable ambient temperature.

Embodiment 5

This example discloses a kind of Vehicular dynamic battery system heating management method, and as shown in Figure 6, described electrokinetic cell system heating management method comprises the steps:

Step S1, startup battery management system 2; Be specially with car key beat to " ON " shelves, start battery management system 2 after, detect the battery context temperature, detect electric weight, detect whether information such as external charge power supply of charging device 6 according to checkout gear.Select heating mode by control device then.

Step S2, detection battery temperature T are if described battery temperature T less than preset temperature T0, then enters step S3; Namely detect battery temperature in the lithium ion battery group 5 by temperature detecting module 221, for preset temperature T0, can set up on their own, the range of choice that its heating-up temperature T0 preferably is set is 0 ~ 15 ℃.Charging can significantly reduce the charge efficiency of lithium ion battery in this temperature below scope, and lithium ion battery is caused damage.Therefore preferred this temperature range is as the line of demarcation.The said temperature scope is as basis for estimation, and is more reasonable relatively.

Step S3, selection heating mode:

When charging device 6 external charge power supplys, preference pattern A;

When charging device 6 does not connect charge power supply, and when electric weight are enough to that battery temperature is increased to T0 in the lithium ion battery group 5, preference pattern B;

When charging device 6 does not connect charge power supply, and when electric weight are not enough to that battery temperature is increased to T0 in the lithium ion battery group 5, preference pattern C;

Define above-mentioned Mode A for adopting the heating of external charge power supply; Mode B is for adopting 5 heating of lithium ion battery group; Pattern C is the no suitable heating power supply of prompting.The selection of above-mentioned pattern realizes by heating mode choice device 3.

The selection course of above-mentioned heating mode can be parallel condition selection course, also can be and carry out deterministic process successively, the parallel condition selection course of indication namely refers to whether external charge device 6 and whether electric weight is enough as basis for estimation in this example, under the situation of considering each condition, direct preference pattern A or Mode B or pattern C.What is called is carried out deterministic process successively and is referred to judge earlier a certain condition, in the process of judging another condition.Judge to be Mode A such as being docile and obedient order, if then be judged to be Mode A, if not, judge further then whether it is Mode B, if then determine that it is Mode B, if not, then judge its pattern C.Be example with parallel condition selection course in this example, can obtaining under the prerequisite of some conditional informations, judge directly which kind of heating mode it selects.

The Vehicular dynamic battery heating management method that adopts present embodiment to provide, owing to be provided with different heating pattern under the varying environment, making all has response under the various environment, the choose reasonable heating is with power supply or in time provide reasonable suggestions.Such as selecting the heating of external charge power supply; Or select inner lithium ion battery group 5 to heat; Perhaps when ambient temperature low, no external charge power supply, and Vehicular dynamic battery internal system lithium ion battery group 5 electric weight are then made prompting to human pilot when being not enough to that battery is heated to suitable temperature, prevent the situation generation of low-temperature heat infringement battery.

Embodiment 6

This example as shown in Figure 7, has provided preferred embodiment a kind ofly on the basis of embodiment 5 to the step of selecting heating mode, step S3 comprises the steps:

Step S31, judge whether the external charge power supply, if then select described Mode A; If not, then enter step S32;

Step S32, judge whether electric weight are enough to battery temperature is increased to preset temperature T0 in the lithium ion battery group 5, if then select described Mode B; If not, then select described pattern C.

Present embodiment adopts elder generation's judgement to have or not the external charge power supply, judges the mode of lithium ion battery group 5 electric weight then, successively its heating mode is selected.Adopt this kind mode can optimize determining program, simplify flow process.When at low temperatures battery being operated, the power supply that heater 1 connects preferentially uses the external charge power supply.Like this, the efficient of its heating is faster higher, and guarantees that the electric weight of lithium ion battery group 5 does not consume because being used for heating.

Embodiment 7

In the utility model embodiment, step S3 realizes that by heating mode choice device 3 wherein heating mode choice device 3 comprises heater switch K1 and charge switch K2; Heater switch K1 is arranged between heater 1 and the charging device 6, on the high-voltage line 4 between heater 1 and the lithium ion battery group 5, be used between control heater 1 and the charging device 6, the connecting and disconnecting of the circuit between heater and the lithium ion battery group; Charge switch K2 is arranged between lithium ion battery group 5 and the charging device 6, on the high-voltage line 4 between lithium ion battery group and the heater 1, be used between control lithium ion battery group 5 and the heater 1, the connecting and disconnecting of the circuit between lithium ion battery group 5 and the charging device 6.

Be specially above-mentioned heater switch K1 and charge switch K2 combining structure for heating mode choice device 3, its heating management method is specifically referring to Fig. 8, Mode A is: charging device 6 external charge power supplys, connect described heater switch K1, turn off charge switch K2 connects the external charge power supply and gives heater 1 power supply.Be specially: after the external charge power supply is plugged in electric motor car, battery management system 2 wakes up, begin to detect battery temperature T, find that battery temperature T is lower than preset temperature T0, and charging device 6 there is the external charge power supply to be electrically connected with this charge power supply interface 61, then battery management system 2 closed heater switch K1, charge switch K2 keeps disconnection, battery management system 2 sends opens the heating instruction to charging device 6, and heater 1 is started working, and detects T 〉=T0 until battery management system 2.Preferably, can also after finishing, heating charge to this lithium ion battery group 5, concrete steps are closed the heating instruction to charging device 6 for sending, disconnect heater switch K1 then, closed charge switch K2, battery management system 2 sends opens charging instruction to charging device 6, begins charging and finishes battery management system 2 turn off charge switch K2 until charging.Battery management system 2 continues the electric core temperature T of monitoring in real time, as T≤T0, then open the charging heating mode again, thereby before guaranteeing vehicle launch, battery temperature remains on more than the T0.As disconnect the charge power supply access, can start vehicle and begin to exercise.Preferably, when heater 1 is heated, send the locking signal to whole-control system 7, whole-control system 7 guarantees that with the vehicle locking no vehicle moves phenomenon in heating process, guarantees safety.

Mode B is: charging device 6 is the external charge power supply not, connects described heater switch K1, connects described charge switch K2, connects described lithium ion battery group 5 and gives heater 1 power supply.Be specially: the electric motor car key beat to " ON " shelves, battery management system 2 wakes up, begin to detect battery temperature, find that battery temperature T is lower than preset temperature T0, and the charge power supply interface 61 that does not detect charging device 6 has power supply to insert, then battery management system 2 begins to calculate, and judges whether current battery system dump energy can make battery system be heated above target preset temperature T0 as being used for from heating.Its judgment formula is SOC 〉=SOC1+ ∑ mc (T0-T)/E, if this formula is set up, judge that then current Vehicular dynamic battery system dump energy (electric weight) is enough to battery temperature is increased to preset temperature T0, if this formula is false, judge that then current Vehicular dynamic battery system dump energy (electric weight) is not enough to battery temperature is increased to preset temperature T0; When this formula is set up, battery management system 2 closed heater switch K1 and charge switch K2, heater 1 is started working.Preferably, battery management system 2 sends the locking power signal to entire car controller, vehicle is locked, do not allow vehicle launch when making charging, preventing in the heating process that vehicle moves causes the electric generator of vehicle generating, to the appearance of lithium ion battery group 5 charging phenomenons, stop the generation of low temperature charging phenomenon.Lasting heating detects electric core temperature until battery management system 2 and is higher than T0, disconnects heater switch K1 and charge switch K2.Whether need charging by artificial judgement this moment, begin to exercise as not needing then to start vehicle, as needs, then seek charging pile, inserting external power supply charges to battery, disconnect heater switch K1 this moment, closed charge switch K2, and battery management system 2 sends charging instruction to charging device 6, can charge to lithium ion battery group 5, after charging is finished, disconnect charging pile, can start vehicle and begin to exercise.

In the above-mentioned formula, SOC is current battery charge state, the battery charge state that SOC1 ends for discharge, m is the quality of each parts in the Vehicular dynamic battery system, and c is the specific heat capacity of each parts, and T is Current Temperatures, T0 is the target temperature of heating, and E is the gross energy of Vehicular dynamic battery system.Battery charge state when the battery charge state that so-called discharge ends refers to allow with battery discharge to a certain state, for example, it is 20% that revaluate is set, and then battery is placed 20% o'clock, will not allow to discharge again.

Pattern C is: charging device 6 is the external charge power supply not, disconnects heater switch K1, points out no suitable heating power supply to give heater 1 power supply.Be specially: the electric motor car key is beaten the shelves to " ON ", battery management system 2 wakes up, begin to detect battery temperature, find that battery temperature T is lower than preset temperature T0, and the charge power supply interface 61 that does not detect charging device 6 has the external charge power supply to insert, then battery management system 2 begins to calculate, this moment is during as SOC≤SOC1+ ∑ mc (T0-T)/E, be that electric weight in the lithium ion battery group 5 are not enough to battery is heated to T0 when above, then battery management system 2 sends a signal to the prompting that instrument shows no suitable heating power supply, certainly, also can adopt voice prompting mode to realize.Such as the prompting that can show " battery low temperature, the heating of please charging " at vehicular meter, also this literal content of voice broadcast separately, perhaps the while points out the driver to seek charging pile in conjunction with literal or voice prompting mode.When the driver sought the access of charging pile power supply according to prompting, then the mode of the same Mode B of follow-up flow process was carried out.

When battery temperature T 〉=T0, then need not lithium-ion-power cell is heated, can judge that can show that current electric quantity gives the driver, the driver makes accordingly and need not to charge or seeks the selection that charging pile charges this moment to lithium ion battery group 5 electric weight.If need not charging, then can directly start vehicle and travel, if electric weight is low excessively, then can point out the driver to seek charging pile and insert charging, during charging, disconnect heater switch K1, connect charge switch K2, battery management system 2 sends charging instruction to charging device 6, charges to suitable temperature and gets final product.

Above-mentioned steps S3 selects the process of heating mode to judge with loop cycle, such as in a certain short cycle, to battery temperature, electric weight, information such as external power supply is judged one by one, select suitable heating mode to heat or point out and seek charging pile heating or charging, when one-period finishes, then repeat above-mentioned deterministic process.

Since select the process of heating mode be according to lithium ion battery temperature, electric weight, current state such as external power supply is selected in real time.Therefore, guarantee the real-time of its heating management method, guaranteed the effective comprehensively of Vehicular battery system heating management method, can farthest prevent the appearance of low temperature charging phenomenon, thoroughly solved the variety of issue that low-temperature heat brings.

The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.

Claims (4)

Translated fromChinese

1.一种车用动力电池系统，包括锂离子电池组、加热装置、电池管理系统、加热模式选择装置、及充电装置；1. A vehicle power battery system, comprising a lithium-ion battery pack, a heating device, a battery management system, a heating mode selection device, and a charging device;所述充电装置、加热装置及锂离子电池组两两之间均通过高压线电连接；The charging device, the heating device and the lithium-ion battery pack are electrically connected by high-voltage wires;所述加热模式选择装置设置于所述加热装置与锂离子电池组之间、加热装置与充电装置之间、以及锂离子电池组与充电装置之间，受电池管理系统控制，用于实现所述加热装置与锂离子电池组的电路通断，和所述加热装置与充电装置的电路通断。The heating mode selection device is arranged between the heating device and the lithium-ion battery pack, between the heating device and the charging device, and between the lithium-ion battery pack and the charging device, and is controlled by the battery management system to realize the described The heating device is connected to the lithium ion battery pack, and the heating device is connected to the charging device.2.根据权利要求1所述的车用动力电池系统，其特征在于，所述加热模式选择装置包括加热开关和充电开关；2. The vehicle power battery system according to claim 1, wherein the heating mode selection device comprises a heating switch and a charging switch;所述加热开关设置于所述加热装置与充电装置之间、加热装置与锂离子电池组之间的高压线上，用于控制加热装置与充电装置之间、加热装置与锂离子电池组之间的电路通断；The heating switch is arranged on the high-voltage line between the heating device and the charging device, and between the heating device and the lithium-ion battery pack, and is used to control the voltage between the heating device and the charging device, and between the heating device and the lithium-ion battery pack. circuit on and off;所述充电开关设置于所述锂离子电池组与充电装置之间、锂离子电池组与加热装置之间的高压线上，用于控制锂离子电池组与加热装置之间、锂离子电池组与充电装置之间的电路通断。The charging switch is set on the high voltage line between the lithium ion battery pack and the charging device, between the lithium ion battery pack and the heating device, and is used to control the connection between the lithium ion battery pack and the heating device, the lithium ion battery pack and the charging device. Circuit breaker between devices.3.根据权利要求2所述的车用动力电池系统，其特征在于，所述充电装置、加热装置及锂离子电池组两两之间均通过高压线电连接包括：3. The power battery system for vehicles according to claim 2, wherein the charging device, the heating device and the lithium-ion battery pack are electrically connected between each other through a high-voltage line, including:所述充电装置、加热装置及锂离子电池组两两之间均分别通过两条高压线电连接，所述两条高压线中一条高压线连接正端、另一条高压线连接负端；The charging device, the heating device and the lithium-ion battery pack are electrically connected to each other through two high-voltage wires, one of the two high-voltage wires is connected to the positive terminal, and the other is connected to the negative terminal;所述加热开关设置于所述充电装置与加热装置之间的两条高压线中的一条高压线上；所述充电开关设置于所述充电装置与锂离子电池组之间的两条高压线中的一条高压线上；所述加热开关和充电开关串联设置于所述加热装置与锂离子电池组之间的两条高压线中的一条高压线上。The heating switch is set on one of the two high-voltage lines between the charging device and the heating device; the charging switch is set on one of the two high-voltage lines between the charging device and the lithium-ion battery pack Above; the heating switch and the charging switch are arranged in series on one of the two high-voltage lines between the heating device and the lithium-ion battery pack.4.一种电动汽车，其特征在于，所述电动汽车包括所述权利要求1-3中任意一项所述的车用动力电池系统、及整车控制系统；所述整车控制系统用于控制所述动力电池系统中的电池管理系统及充电装置。4. An electric vehicle, characterized in that the electric vehicle comprises the vehicle power battery system described in any one of claims 1-3, and a vehicle control system; the vehicle control system is used for Control the battery management system and charging device in the power battery system.

Images