CN107742762A - A power battery thermal management system - Google Patents
A power battery thermal management system Download PDFInfo
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- CN107742762A CN107742762A CN201711056074.7A CN201711056074A CN107742762A CN 107742762 A CN107742762 A CN 107742762A CN 201711056074 A CN201711056074 A CN 201711056074A CN 107742762 A CN107742762 A CN 107742762A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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Abstract
一种动力电池热管理系统，包括若干电池组、若干导热板、热交换器、储液箱、加热器、压缩机、若干连接管、温度检测器和控制器；若干导热板围设形成用于收容对应电池组的收容筒；每个导热板内设有液流通道；热交换器包括第一通道和第二通道；储液箱内存有冷却液；热交换器的第一通道、加热器、若干导热板的液流通道及储液箱依次通过连接管连接，形成第一循环系统；热交换器的第二通道与压缩机通过若干连接管连接，形成第二循环系统；第二循环系统中循环流动有制冷剂；第一循环系统和第二循环系统通过热交换器的第一通道和第二通道进行热交换；温度检测器设置在其中一个电池组内并与控制器信号连接；控制器用于控制加热器和压缩机的启停。
A power battery thermal management system, including several battery packs, several heat conduction plates, heat exchangers, liquid storage tanks, heaters, compressors, several connecting pipes, temperature detectors and controllers; The storage tube that accommodates the corresponding battery pack; each heat conduction plate is provided with a liquid flow channel; the heat exchanger includes a first channel and a second channel; there is cooling liquid in the liquid storage tank; the first channel of the heat exchanger, the heater, The liquid flow passages of several heat conduction plates and the liquid storage tanks are connected sequentially through connecting pipes to form a first circulation system; the second passage of the heat exchanger is connected to the compressor through several connection pipes to form a second circulation system; in the second circulation system Refrigerant circulates; the first circulation system and the second circulation system perform heat exchange through the first channel and the second channel of the heat exchanger; the temperature detector is set in one of the battery packs and is connected to the controller signal; the controller uses Used to control the start and stop of heaters and compressors.
Description
【技术领域】【Technical field】
本发明涉及动力电池技术领域，尤其涉及一种动力电池热管理系统。The invention relates to the technical field of power batteries, in particular to a power battery thermal management system.
【背景技术】【Background technique】
动力电池作为电动汽车的动力源，具备了较大的容量和输出功率。动力电池在大倍率和极端环境下运行时，将会产生大量的热量。如果热量不能及时散出，电池的温度将会迅速上升，过高的温度将会导致电池的循环寿命下降、电化学性能严重衰退，甚至会出现“热失控”等安全性问题。因此，采用合理的热管理系统对提高动力电池的循环寿命和安全性是必不可少的。As the power source of electric vehicles, the power battery has a large capacity and output power. When the power battery is running at a high rate and in an extreme environment, it will generate a lot of heat. If the heat cannot be dissipated in time, the temperature of the battery will rise rapidly. Excessive temperature will lead to a decrease in the cycle life of the battery, a serious decline in electrochemical performance, and even safety problems such as "thermal runaway". Therefore, it is essential to adopt a reasonable thermal management system to improve the cycle life and safety of power batteries.
目前，针对电动汽车的动力电池热管理方面，最为常见的方法及存在的缺点如下：1、靠电池组本体自然散热，制冷效果不明显，未能解决问题；2、在电动汽车的每个电池组上设置独立的制冷装置，虽然起到一定的效果，但各个电池组之间的温度难以统一，存在热不均的现象；3、设置统一的制冷装置，但多个电池组采用串联的降温方式，使得靠近制冷装置的电池组温度较低，远离制冷装置的电池组温度较高，同样存在热不均的现象。此外，常见的热管理系统一般只起到制冷作用，缺少低温加热功能。At present, the most common methods and their shortcomings for the thermal management of power batteries in electric vehicles are as follows: 1. The cooling effect is not obvious by relying on the natural heat dissipation of the battery pack body, which fails to solve the problem; 2. Each battery in the electric vehicle An independent refrigeration device is installed on the battery pack, although it has a certain effect, but the temperature between each battery pack is difficult to unify, and there is a phenomenon of heat unevenness; 3. A unified refrigeration device is installed, but multiple battery packs are cooled in series In this way, the temperature of the battery pack close to the refrigeration device is low, and the temperature of the battery pack far away from the refrigeration device is high, and there is also a phenomenon of heat unevenness. In addition, common thermal management systems generally only play a cooling role, lacking low-temperature heating functions.
鉴于以上弊端，实有必要提供一种动力电池热管理系统以克服以上缺陷。In view of the above disadvantages, it is necessary to provide a power battery thermal management system to overcome the above disadvantages.
【发明内容】【Content of invention】
本发明的目的在于提供一种动力电池热管理系统，可以安全有效地对电池组起到高温冷却、低温加热的作用，并保持各电池组温度平衡，延长动力电池整体的使用寿命。The purpose of the present invention is to provide a power battery thermal management system, which can safely and effectively cool the battery pack at high temperature and heat it at low temperature, maintain the temperature balance of each battery pack, and prolong the service life of the power battery as a whole.
为了实现上述目的，本发明提供一种动力电池热管理系统，包括若干电池组、若干导热板、热交换器、储液箱、加热器、压缩机、若干连接管、温度检测器和控制器；若干导热板围设形成与每个电池组一一对应并用于收容对应电池组的收容筒；每个导热板内设有液流通道；所述热交换器包括一个第一通道和一个第二通道；所述储液箱内存有冷却液；所述热交换器的第一通道、加热器、若干导热板的液流通道及储液箱依次通过所述连接管连接，形成第一循环系统；所述热交换器的第二通道与所述压缩机通过若干连接管连接，形成第二循环系统；所述第二循环系统中循环流动有制冷剂；所述第一循环系统和所述第二循环系统通过所述热交换器的第一通道和第二通道进行热交换；所述温度检测器设置在其中一个电池组内并与所述控制器信号连接；所述控制器用于控制所述加热器和所述压缩机的启停。In order to achieve the above purpose, the present invention provides a power battery thermal management system, including several battery packs, several heat conduction plates, heat exchangers, liquid storage tanks, heaters, compressors, several connecting pipes, temperature detectors and controllers; A plurality of heat conduction plates are arranged to form a storage cylinder corresponding to each battery pack one by one and used to accommodate the corresponding battery pack; each heat conduction plate is provided with a liquid flow channel; the heat exchanger includes a first channel and a second channel There is coolant in the liquid storage tank; the first channel of the heat exchanger, the heater, the liquid flow channels of several heat conduction plates and the liquid storage tank are sequentially connected through the connecting pipe to form a first circulation system; The second channel of the heat exchanger is connected with the compressor through several connecting pipes to form a second circulation system; refrigerant circulates in the second circulation system; the first circulation system and the second circulation The system performs heat exchange through the first channel and the second channel of the heat exchanger; the temperature detector is arranged in one of the battery packs and connected with the controller signal; the controller is used to control the heater and start and stop of the compressor.
在一个优选实施方式中，所述电池组呈长方体状，每个导热板呈矩形板状且安装在所述电池组的其中一个侧面上；所述导热板内的液流通道的进液口和出液口分别开设在所述导热板的两端。In a preferred embodiment, the battery pack is in the shape of a cuboid, and each heat conducting plate is in the shape of a rectangular plate and is installed on one side of the battery pack; the liquid inlet of the liquid flow channel in the heat conducting plate and The liquid outlets are respectively opened at both ends of the heat conducting plate.
在一个优选实施方式中，所述导热板内的液流通道沿所述进液口至所述出液口方向形成若干间隔平行的微型管道。In a preferred embodiment, the liquid flow channel in the heat conducting plate forms several parallel micro-pipes along the direction from the liquid inlet to the liquid outlet.
在一个优选实施方式中，所述热交换器的第一通道呈直管状，第二通道呈螺旋管状，且所述第二通道环绕所述第一通道。In a preferred embodiment, the first channel of the heat exchanger is in the shape of a straight tube, the second channel is in the shape of a spiral tube, and the second channel surrounds the first channel.
在一个优选实施方式中，在所述控制器内预设一个第一温度阈值和一个第二温度阈值，且所述第一温度阈值小于所述第二温度阈值；当所述温度检测器检测的温度小于所述第一温度阈值时，所述控制器控制所述加热器启动；当所述温度检测器检测的温度大于所述第二温度阈值时，所述控制器控制所述压缩机启动。In a preferred embodiment, a first temperature threshold and a second temperature threshold are preset in the controller, and the first temperature threshold is smaller than the second temperature threshold; when the temperature detector detects When the temperature is lower than the first temperature threshold, the controller controls the heater to start; when the temperature detected by the temperature detector is greater than the second temperature threshold, the controller controls the compressor to start.
在一个优选实施方式中，所述动力电池热管理系统还包括水泵，所述水泵设置在所述第一循环系统上，且所述水泵由所述控制器控制。In a preferred embodiment, the power battery thermal management system further includes a water pump, the water pump is arranged on the first circulation system, and the water pump is controlled by the controller.
在一个优选实施方式中，所述动力电池热管理系统还包括流量阀，所述流量阀设置在所述第一循环系统上，且所述流量阀由所述控制器控制。In a preferred embodiment, the power battery thermal management system further includes a flow valve, the flow valve is arranged on the first circulation system, and the flow valve is controlled by the controller.
在一个优选实施方式中，所述动力电池热管理系统还包括冷凝器，所述冷凝器设置在所述第二循环系统上，并位于所述压缩机和所述热交换器之间。In a preferred embodiment, the power battery thermal management system further includes a condenser, and the condenser is arranged on the second circulation system and located between the compressor and the heat exchanger.
在一个优选实施方式中，所述动力电池热管理系统还包括膨胀阀，所述膨胀阀设置在所述第二循环系统上并位于所述冷凝器和所述热交换器之间，且所述膨胀阀由所述控制器控制。In a preferred embodiment, the thermal management system of the power battery further includes an expansion valve, the expansion valve is arranged on the second circulation system and is located between the condenser and the heat exchanger, and the The expansion valve is controlled by the controller.
与现有技术相比，本发明提供的动力电池热管理系统的有益效果在于：可以实现低温加热、高温冷却的功能；冷却液采用并联的方式经过若干导热板，使若干电池组的温度保持均衡；此外，通过控制器来实现自动控制温度，控温效果好。Compared with the prior art, the beneficial effect of the power battery thermal management system provided by the present invention is that: the functions of low-temperature heating and high-temperature cooling can be realized; the cooling liquid passes through several heat-conducting plates in parallel to keep the temperature of several battery packs balanced ; In addition, the automatic temperature control is realized through the controller, and the temperature control effect is good.
【附图说明】【Description of drawings】
图1为本发明动力电池热管理系统的结构示意图。Fig. 1 is a schematic structural diagram of a power battery thermal management system of the present invention.
图2为图1所示的导热板的内部结构示意图。FIG. 2 is a schematic diagram of the internal structure of the heat conducting plate shown in FIG. 1 .
【具体实施方式】【detailed description】
为了使本发明的目的、技术方案和有益技术效果更加清晰明白，以下结合附图和具体实施方式，对本发明进行进一步详细说明。应当理解的是，本说明书中描述的具体实施方式仅仅是为了解释本发明，并不是为了限定本发明。In order to make the object, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.
如图1所示，本发明提供一种动力电池热管理系统100，包括若干电池组10、若干导热板20、热交换器30、储液箱40、加热器50、压缩机60、若干连接管70、温度检测器(图未示)和控制器80。所述储液箱40内存有冷却液，所述加热器50对流经所述加热器50的冷却液进行加热升温处理。本实施方式中，所述冷却液为水、乙二醇、石墨粉按照质量比45：45：10混合而成，熔点为-35℃，可适应极端低温环境，导热系数为3.53W/mk，远远大于水的导热率，以提高热交换效率。As shown in Figure 1, the present invention provides a power battery thermal management system 100, including several battery packs 10, several heat conduction plates 20, heat exchangers 30, liquid storage tanks 40, heaters 50, compressors 60, and several connecting pipes 70. A temperature detector (not shown) and a controller 80. The liquid storage tank 40 contains cooling liquid, and the heater 50 heats and raises the temperature of the cooling liquid flowing through the heater 50 . In this embodiment, the cooling liquid is a mixture of water, ethylene glycol, and graphite powder at a mass ratio of 45:45:10, with a melting point of -35°C, which can adapt to extremely low temperature environments, and a thermal conductivity of 3.53W/mk. Far greater than the thermal conductivity of water to improve heat exchange efficiency.
具体的，若干导热板20围设形成与每个电池组10一一对应并用于收容对应电池组10的收容筒。如图2所示，每个导热板20内设有液流通道21。本实施方式中，所述电池组10呈长方体状，每个导热板20呈矩形板状且安装在所述电池组10的其中一个侧面上。所述导热板20内的液流通道21的进液口211和出液口212分别开设在所述导热板20的两端。所述导热板20内的液流通道21沿所述进液口211至所述出液口212方向形成若干间隔平行的微型管道213，当冷却液经过所述导热板20内的液流通道21时，由于微型管道213的设计，可以提高冷却液与电池组10的热交换效率，在一定程度上起到节约能源的作用。Specifically, a plurality of heat conduction plates 20 surround and form a storage cylinder corresponding to each battery pack 10 and used to accommodate the corresponding battery pack 10 . As shown in FIG. 2 , each heat conducting plate 20 is provided with a liquid flow channel 21 . In this embodiment, the battery pack 10 is in the shape of a cuboid, and each heat conducting plate 20 is in the shape of a rectangular plate and installed on one side of the battery pack 10 . The liquid inlet 211 and the liquid outlet 212 of the liquid flow channel 21 in the heat conduction plate 20 are opened at both ends of the heat conduction plate 20 respectively. The liquid flow channel 21 in the heat conduction plate 20 forms several parallel micro-pipes 213 along the direction from the liquid inlet 211 to the liquid outlet 212. When the cooling liquid passes through the liquid flow channel 21 in the heat conduction plate 20 At this time, due to the design of the micro-pipe 213, the heat exchange efficiency between the cooling liquid and the battery pack 10 can be improved, which can save energy to a certain extent.
所述热交换器30包括一个第一通道31和一个第二通道32。具体的，所述热交换器的第一通道31呈直管状、第二通道32呈螺旋管状，且所述第二通道32环绕所述第一通道31，以提高所述第一通道31和所述第二通道32之间的接触面积。所述热交换器30的第一通道31、加热器50、若干导热板20的液流通道21及储液箱40依次通过所述连接管70连接，形成第一循环系统。所述热交换器30的第二通道32与所述压缩机60通过若干连接管70连接，形成第二循环系统；所述第二循环系统中循环流动有制冷剂，所述压缩机60用于将制冷剂压缩成高温高压的气体，是所述第二循环系统的动力所在。此外，所述动力电池热管理系统100还包括冷凝器61，所述冷凝器61设置在所述第二循环系统上，并位于所述压缩机60和所述热交换器30之间。所述冷凝器61用于将所述压缩机60压缩的高温高压气体与外界冷源热交换形成低温高压液体。所述第一循环系统和所述第二循环系统通过所述热交换器30的第一通道31和第二通道32进行热交换；可以理解的是，所述第二循环系统中的制冷剂经所述压缩机60和所述冷凝器61后形成的低温高压液体在所述热交换器30内与所述第一循环系统中的冷却液进行热交换，所述制冷剂吸收冷却液的温度后形成气体再回到所述压缩机60内进行循环，所述冷却液降温后随着所述第一循环系统进入到若干导热板20的液流通道21中，与电池组10进行热交换，使电池组10降温。需要说明的是，冷却液采用并联的方式经过若干导热板20，即冷却液同时进入若干导热板20的进液口211，且同时从若干导热板20的出液口212流出，以确保每个电池组10的升温或降温的效果一致。The heat exchanger 30 includes a first channel 31 and a second channel 32 . Specifically, the first channel 31 of the heat exchanger is in the shape of a straight tube, the second channel 32 is in the shape of a spiral tube, and the second channel 32 surrounds the first channel 31, so as to improve the The contact area between the second channels 32. The first channel 31 of the heat exchanger 30 , the heater 50 , the liquid flow channels 21 of the plurality of heat conducting plates 20 and the liquid storage tank 40 are sequentially connected through the connecting pipe 70 to form a first circulation system. The second channel 32 of the heat exchanger 30 is connected to the compressor 60 through several connecting pipes 70 to form a second circulation system; refrigerant circulates in the second circulation system, and the compressor 60 is used for Compressing the refrigerant into high-temperature and high-pressure gas is the driving force of the second cycle system. In addition, the power battery thermal management system 100 further includes a condenser 61 , the condenser 61 is arranged on the second circulation system and located between the compressor 60 and the heat exchanger 30 . The condenser 61 is used to exchange heat between the high-temperature and high-pressure gas compressed by the compressor 60 and an external cold source to form a low-temperature and high-pressure liquid. The first circulation system and the second circulation system perform heat exchange through the first passage 31 and the second passage 32 of the heat exchanger 30; it can be understood that the refrigerant in the second circulation system passes through The low-temperature high-pressure liquid formed after the compressor 60 and the condenser 61 exchanges heat with the cooling liquid in the first circulation system in the heat exchanger 30, and the refrigerant absorbs the temperature of the cooling liquid The formed gas returns to the compressor 60 for circulation. After cooling down, the cooling liquid enters the liquid flow channels 21 of several heat conducting plates 20 along with the first circulation system, and exchanges heat with the battery pack 10, so that The battery pack 10 cools down. It should be noted that the coolant passes through several heat conduction plates 20 in parallel, that is, the coolant enters the liquid inlets 211 of several heat conduction plates 20 at the same time, and flows out from the liquid outlets 212 of several heat conduction plates 20 at the same time, so as to ensure that each The effect of heating up or cooling down the temperature of the battery pack 10 is the same.
所述温度检测器设置在其中一个电池组10内并与所述控制器80信号连接。所述温度检测器用于检测电池组10的温度，并将检测的结果传递给所述控制器80，所述控制器80根据所述温度检测器检测的结果发出相应的控制信号。需要说明的是，由于本发明对若干电池组10采用并联降温和升温的方式，保证每个电池组10温度的一致性，因此，只需要检测其中一个电池组10的温度即可得到整个动力电池组的温度信息，进而节省了元件的使用。所述控制器80用于控制所述加热器50和所述压缩机60的启停。具体的，在所述控制器80内预设一个第一温度阈值和一个第二温度阈值，且所述第一温度阈值小于所述第二温度阈值；可以理解的是，所述第一温度阈值和所述第二温度阈值分别对应所述电池组10最适工作温度的下限值和上限值。当所述温度检测器检测的温度小于所述第一温度阈值时，所述控制器80控制所述加热器50启动，此时，所述压缩机60处于停止状态，所述热交换器30的第一通道31和第二通道32不发生热交换；即启动低温加热的功能；对应的第一循环系统的冷却液经所述加热器50升温后进入到若干导热板20中，对若干电池组10同时进行升温处理，使每个电池组10的温度升到最适工作温度，以适应低温的工作环境。当所述温度检测器检测的温度大于所述第二温度阈值时，所述控制器80控制所述压缩机60启动，此时，所述加热器50处于停止状态；即启动高温制冷功能；所述第二循环系统的制冷剂在所述热交换器30的第二通道32中与所述热交换器30的第一通道31的冷却液进行热交换，使冷却液降温后进入到若干导热板20中，对若干电池组10进行降温处理，使每个电池组10的温度降到最适工作温度，以适应高温的工作环境。需要说明的是，当所述温度检测器检测的温度在所述第一温度阈值和第二温度阈值之间时，所述加热器50和所述压缩机60均处于停止状态，以减少能耗。The temperature detector is arranged in one of the battery packs 10 and is connected with the controller 80 for signals. The temperature detector is used to detect the temperature of the battery pack 10, and transmit the detection result to the controller 80, and the controller 80 sends a corresponding control signal according to the detection result of the temperature detector. It should be noted that since the present invention adopts parallel cooling and heating methods for several battery packs 10 to ensure the consistency of the temperature of each battery pack 10, it is only necessary to detect the temperature of one of the battery packs 10 to obtain the temperature of the entire power battery. Group temperature information, thereby saving the use of components. The controller 80 is used to control the start and stop of the heater 50 and the compressor 60 . Specifically, a first temperature threshold and a second temperature threshold are preset in the controller 80, and the first temperature threshold is smaller than the second temperature threshold; it can be understood that the first temperature threshold and the second temperature threshold respectively correspond to the lower limit and upper limit of the optimum working temperature of the battery pack 10 . When the temperature detected by the temperature detector is lower than the first temperature threshold, the controller 80 controls the heater 50 to start, at this time, the compressor 60 is in a stopped state, and the heat exchanger 30 There is no heat exchange between the first channel 31 and the second channel 32; that is, the function of low-temperature heating is started; the corresponding cooling liquid of the first circulation system enters into several heat conducting plates 20 after being heated up by the heater 50, and it is effective for several battery packs. 10 at the same time carry out temperature-raising treatment, so that the temperature of each battery pack 10 rises to the optimum working temperature, so as to adapt to the low-temperature working environment. When the temperature detected by the temperature detector is greater than the second temperature threshold, the controller 80 controls the compressor 60 to start. At this time, the heater 50 is in a stopped state; that is, the high-temperature refrigeration function is started; The refrigerant in the second cycle system exchanges heat with the coolant in the first channel 31 of the heat exchanger 30 in the second channel 32 of the heat exchanger 30, so that the coolant cools down and enters several heat conducting plates In 20, the cooling process is performed on several battery packs 10, so that the temperature of each battery pack 10 drops to the optimum working temperature, so as to adapt to the high temperature working environment. It should be noted that, when the temperature detected by the temperature detector is between the first temperature threshold and the second temperature threshold, both the heater 50 and the compressor 60 are in a stop state to reduce energy consumption .
进一步的，所述动力电池热管理系统100还包括水泵41，所述水泵41设置在所述第一循环系统上，且所述水泵41由所述控制器80控制。当所述温度检测器检测的温度小于所述第一温度阈值或大于所述第二温度阈值时，所述控制器80控制所述水泵41启动，为所述第一循环系统的冷却液提供循环的动力。此外，所述动力电池热管理系统100还包括流量阀42，所述流量阀42设置在所述第一循环系统上，且所述流量阀42由所述控制器80控制。所述流量阀42用于控制所述第一循环系统中冷却液循环的流量，从而控制所述动力电池热管理系统100升温或降温的速度，具有控温精确的效果。Further, the power battery thermal management system 100 also includes a water pump 41 , the water pump 41 is arranged on the first circulation system, and the water pump 41 is controlled by the controller 80 . When the temperature detected by the temperature detector is less than the first temperature threshold or greater than the second temperature threshold, the controller 80 controls the start of the water pump 41 to provide circulation for the coolant in the first circulation system. motivation. In addition, the power battery thermal management system 100 further includes a flow valve 42 , the flow valve 42 is arranged on the first circulation system, and the flow valve 42 is controlled by the controller 80 . The flow valve 42 is used to control the circulation flow of the coolant in the first circulation system, so as to control the heating or cooling speed of the power battery thermal management system 100 , which has the effect of precise temperature control.
进一步的，所述动力电池热管理系统100还包括膨胀阀62，所述膨胀阀62设置在所述第二循环系统上并位于所述冷凝器61和所述热交换器30之间，且所述膨胀阀62由所述控制器80控制。所述膨胀阀62用于控制所述第二循环系统中制冷剂的流量。当所述动力电池热管理系统100启动低温加热功能时，所述膨胀阀62关闭，使制冷剂无法进入到所述热交换器30中。当所述动力电池热管理系统100启动高温制冷功能时，通过所述膨胀阀62对所述第二循环系统中的制冷剂的流量进行调节，从而控制制冷的温度。Further, the power battery thermal management system 100 also includes an expansion valve 62, the expansion valve 62 is arranged on the second circulation system and is located between the condenser 61 and the heat exchanger 30, and the The expansion valve 62 is controlled by the controller 80 . The expansion valve 62 is used to control the flow of refrigerant in the second circulation system. When the power battery thermal management system 100 activates the low-temperature heating function, the expansion valve 62 is closed so that the refrigerant cannot enter the heat exchanger 30 . When the power battery thermal management system 100 starts the high-temperature cooling function, the expansion valve 62 adjusts the flow rate of the refrigerant in the second circulation system, thereby controlling the cooling temperature.
本发明提供的动力电池热管理系统，可以实现低温加热、高温冷却的功能；冷却液采用并联的方式经过若干导热板，使若干电池组的温度保持均衡；此外，通过控制器来实现自动控制温度，控温效果好。The power battery thermal management system provided by the present invention can realize the functions of low-temperature heating and high-temperature cooling; the coolant passes through several heat-conducting plates in parallel to keep the temperature of several battery packs balanced; in addition, automatic temperature control is realized through the controller , good temperature control effect.
本发明并不仅仅限于说明书和实施方式中所描述，因此对于熟悉领域的人员而言可容易地实现另外的优点和修改，故在不背离权利要求及等同范围所限定的一般概念的精神和范围的情况下，本发明并不限于特定的细节、代表性的设备和这里示出与描述的图示示例。The present invention is not limited to the description in the description and the implementation, so those skilled in the art can easily realize additional advantages and modifications, so without departing from the spirit and scope of the general concept defined by the claims and equivalent scope Without limitation, the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein.
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