Thermal management device, control method thereof, controller, and medium

Abstract

The invention discloses a thermal management device, a control method thereof, a controller and a medium. The heat management device comprises a heat exchange module. The heat exchange module comprises a heat exchange assembly, a first communication module and a second communication module. The first communication module is used for acquiring first working information of the battery pack and second working information of the energy storage system; the second communication module is arranged on the heat exchange assembly, the second communication module is connected with the control module, the second communication module is used for sending the first working information and the second working information to the control module, and the control module further controls the state of the heat exchange module through the second communication module; the control module controls the state of each heat exchange assembly according to the first working information and the second working information. According to the energy storage system, the battery packs can be efficiently and accurately managed according to the working states of the battery packs and the energy storage system.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage systems, and in particular to a thermal management device and a control method, controller, and medium thereof. Background Art

[0002] The energy storage system usually includes a cabinet and several battery packs in the cabinet. In order to make the energy storage system work within a reasonable temperature range, a thermal management device is usually required to cool or heat the energy storage system. Among them, the existing thermal management device cannot cool or heat each battery pack individually, and the energy storage system cannot manage each battery pack efficiently and accurately according to the working status of the battery pack and the energy storage system. Summary of the invention

[0003] The present application provides a thermal management device and a control method thereof, a controller, and a medium, which can efficiently and accurately manage each battery pack according to the working status of the battery pack and the energy storage system.

[0004] To solve the above technical problems, the first technical solution provided by the present application is to provide a thermal management device, which includes a control module and multiple heat exchange modules, and the heat exchange module includes: a heat exchange component, which is used to exchange heat with a battery pack of an energy storage system; a first communication module, which is arranged on the heat exchange component, and the first communication module is used to connect the battery pack, and the first communication module is used to obtain first working information of the battery pack and second working information of the energy storage system; a second communication module, which is arranged on the heat exchange component, and the second communication module is connected to the control module, and the second communication module is used to send the first working information and the second working information to the control module, and the control module also controls the state of the heat exchange module through the second communication module; wherein, the control module controls the state of each heat exchange component according to the first working information and the second working information.

[0005] In a possible implementation, the first working information includes one or more of the current information of the battery pack, the temperature information of the battery pack, and the power information of the battery pack; the second working information includes one or more of the voltage difference information between the battery packs, the temperature difference information between the battery packs, the fire protection information and the power supply information of the energy storage system.

[0006] In a possible implementation manner, the first communication module is a controller area network module; and the second communication module is a 485 communication module.

[0007] In a possible implementation, the heat exchange assembly includes: a heat exchange body, a heat exchange tube is arranged in the heat exchange body, the heat exchange body is used to be arranged on the battery pack, and the heat exchange tube is connected with the liquid inlet and outlet of the battery pack; wherein a liquid pump is arranged on the heat exchange tube; A heat sink, the heat sink is arranged on at least one side of the heat exchange body, and the heat sink is connected to the heat exchange tube; a heat dissipation fan, the heat dissipation fan is arranged on the heat exchange body, and the heat dissipation fan is arranged corresponding to the heat sink.

[0008] In a possible embodiment, the heat exchange component also includes: a first power supply interface, which is arranged on the heat exchange body and is used to connect to the battery pack; a second power supply interface, which is arranged on the heat exchange body and is used to connect to the AC power.

[0009] To solve the above problems, the second technical solution provided in the present application is to provide a control method for a thermal management device, which is used to control the thermal management device described in any of the above items, and the control method includes: the control module receives the first working information of each battery pack and the second working information of the energy storage system; the control module controls the state of each heat exchange module according to the first working information and the second working information.

[0010] In a possible implementation, the step of the control module controlling the state of each of the heat exchange modules according to the first working information and the second working information specifically includes: the control module determines whether the battery pack is in a thermal runaway state according to the temperature information of the battery pack; if the battery pack is in a thermal runaway state, the control module controls the heat exchange module to be in a strong cooling mode; if the battery pack is not in the thermal runaway state, the control module determines the power supply mode of the heat exchange module according to the power supply information of the energy storage system; if the heat exchange module is in a mains power supply state, the control module controls the heat exchange module to be in a normal mode; If the heat exchange module is in a battery pack powered state, the control module determines whether the power of the battery pack is greater than a preset power according to the power information of the battery pack; if the power of the battery pack is greater than the preset power, the control module controls the heat exchange module to be in a low power consumption mode; if the power of the battery pack is not greater than the preset power, the control module controls the heat exchange module to shut down.

[0011] In a possible implementation, the control method further includes: in response to a firefighting trigger of the energy storage system, the control module controls the heat exchange module to be in a strong cooling mode.

[0012] In a possible implementation, after the step of the control module controlling the heat exchange module to be in a strong cooling mode, the step further includes: in response to the temperature of the battery pack being no greater than a first preset temperature, the control module controlling the heat exchange module to shut down.

[0013] In a possible embodiment, the control method also includes: in response to the temperature of the battery pack being lower than the second preset temperature, the control module controls the heat exchange module to be in a heating mode; in response to the temperature of the battery pack being higher than the third preset temperature, the control module controls the heat exchange module to be in a cooling mode; in response to the temperature of the battery pack being higher than the fourth preset temperature and lower than the fifth preset temperature, the control module determines whether the temperature difference between the battery packs is higher than the preset temperature difference, or whether the voltage difference between the battery packs is higher than the preset voltage difference; if the temperature difference between the battery packs is higher than the preset temperature difference, or the voltage difference between the battery packs is higher than the preset voltage difference, the control module controls the heat exchange module to be in a balancing mode; wherein, the third preset temperature is higher than the fifth preset temperature, and the fourth preset temperature is higher than the second preset temperature.

[0014] In a possible implementation, the step in which the control module controls the heat exchange module to be in a balancing mode specifically includes: in response to the temperature difference between the battery packs being greater than a preset temperature difference; the control module determines the battery pack with the highest temperature and the battery pack with the lowest temperature; the control module controls the heat exchange module on the battery pack with the highest temperature to be in a cooling mode, and the control module controls the heat exchange module on the battery pack with the lowest temperature to be in a heating mode.

[0015] In a possible embodiment, the step in which the control module controls the heat exchange module to be in a balancing mode also includes: in response to the voltage difference between the battery packs being greater than a preset voltage difference; the control module determines the battery pack with the highest voltage and the battery pack with the lowest voltage; the control module controls the heat exchange module on the battery pack with the highest voltage to be in a heating mode, and the control module controls the heat exchange module on the battery pack with the lowest voltage to be in a cooling mode.

[0016] In a possible implementation, the control method further includes: if the temperature difference between the battery packs is not greater than a preset temperature difference, and the voltage difference between the battery packs is not greater than a preset voltage difference, the control module controls the heat exchange module to be in a follow-up mode.

[0017] In a possible implementation, the step in which the control module controls the heat exchange module to be in a follow-up mode specifically includes: the control module obtains current information of the battery pack, and the control module controls the power of the heat exchange module in a cooling mode according to the current information; wherein, the greater the current of the battery pack, the greater the power of the cooling mode is controlled.

[0018] To solve the above problems, the third technical solution provided in the present application is to provide a controller, which includes a processor and a memory connected to each other; wherein the memory stores program instructions, and the processor calls the program instructions from the memory to execute any of the control methods described above.

[0019] To solve the above problems, the third technical solution provided in the present application is to provide a computer-readable storage medium, on which program instructions are stored, and when the program instructions are executed by a processor, any of the control methods described above is implemented.

[0020] The beneficial effect is that the present application provides a thermal management device and its control method, controller, and medium. The thermal management device includes a control module and a plurality of heat exchange modules. The heat exchange module includes: a heat exchange component, the heat exchange component is used to exchange heat with the battery pack of the energy storage system; a first communication module, the first communication module is arranged on the heat exchange component, the first communication module is used to connect the battery pack, and the first communication module is used to obtain the first working information of the battery pack and the second working information of the energy storage system; a second communication module, the second communication module is arranged on the heat exchange component, the second communication module is connected to the control module, the second communication module is used to send the first working information and the second working information to the control module, and the control module also controls the state of the heat exchange module through the second communication module; wherein the control module controls the state of each heat exchange component according to the first working information and the second working information. In the above, the first working information of the battery pack and the second working information of the energy storage system are obtained through the first communication module, and the first working information and the second working information are sent to the control module through the second communication module. The control module can control the state of each heat exchange module according to the first working information and the second working information, so that the energy storage system can efficiently and accurately manage each battery pack according to the working state of the battery pack and the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1It is a first-view structural schematic diagram of an embodiment of a heat exchange module in a thermal management device of the present application; Figure 2 yes Figure 1 A schematic diagram of the heat exchange module from the second perspective; Figure 3 yes Figure 1 Explosion diagram of the heat exchange module structure; Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure of the heat exchange module; Figure 5 yes Figure 1 A schematic diagram of the structure in which the heat exchange module is arranged in the battery pack; Figure 6 It is a structural block diagram of an embodiment of the thermal management device of the present application; Figure 7 It is a flow chart of an embodiment of a control method of a thermal management device of the present application; Figure 8 yes Figure 7 A schematic flow chart of an implementation method of S12; Fig. 9 It is a flow chart of an embodiment of the control method of the present application, in which when the temperature difference between battery packs is greater than a preset temperature difference, the control module controls the heat exchange module to be in a balanced mode; Fig.10 It is a flow chart of an embodiment of the control method of the present application, in which when the voltage difference between battery packs is greater than a preset voltage difference, the control module controls the heat exchange module to be in a balancing mode; Fig.11 It is a structural block diagram of an embodiment of a controller of the present application; Fig.12 It is a structural block diagram of an embodiment of a computer-readable storage medium of the present application.

[0022] Description of the drawings: 100, thermal management device; 10, heat exchange module; 111, first communication module; 112, second communication module; 113, heat exchange body; 114, heat exchange tube; 115, liquid pump; 116, heat sink; 117, cooling fan; 118, first power supply interface; 119, display light; 120, control board; 20, battery pack; 21, liquid inlet and outlet; 30, control module; 40, controller; 401, processor; 402, memory; 50, computer-readable storage medium; 500, program instructions. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] It should be noted that the terms "first" and "second" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0025] Existing thermal management devices cannot cool or heat each battery pack individually, and the energy storage system cannot efficiently and accurately manage each battery pack according to the working status of the battery pack and the energy storage system.

[0026] Based on the above problems, the present application proposes a thermal management device and its control method, controller, and medium. By setting a control module and a heat exchange module, a first communication module and a second communication module are set on the heat exchange module, and the first communication module obtains the first working information of the battery pack and the second working information of the energy storage system, and sends them to the control module through the second communication module. It can effectively solve the above technical problems.

[0027] See also Figure 1 , Figure 5 and Figure 6 , Figure 1 It is a first-view structural schematic diagram of an embodiment of a heat exchange module in a thermal management device of the present application; Figure 5 yes Figure 1 Schematic diagram of the structure in which the heat exchange module is arranged in the battery pack. Figure 6 In a specific embodiment, the thermal management device 100 includes a control module 30 and a plurality of heat exchange modules 10 , and the heat exchange module 10 includes a heat exchange component (not shown), a first communication module 111 and a second communication module 112 .

[0028] The heat exchange component is used to exchange heat with the battery pack 20 of the energy storage system (not shown). The first communication module 111 is set on the heat exchange component, the first communication module 111 is used to connect to the battery pack 20, and the first communication module 111 is used to obtain the first working information of the battery pack 20 and the second working information of the energy storage system; the second communication module 112 is set on the heat exchange component, the second communication module 112 is connected to the control module 30, and the second communication module 112 is used to send the first working information and the second working information to the control module 30, and the control module 30 also controls the state of the heat exchange module 10 through the second communication module 112; wherein, the control module 30 controls the state of each heat exchange component according to the first working information and the second working information.

[0029] Specifically, the heat exchange module 10 is a liquid-cooled heat exchange module 10, and multiple heat exchange modules 10 are connected one by one to the battery pack 20 in the energy storage system cabinet. Among them, the battery pack 20 is provided with a heat exchange plate (not shown) for thermal management, and the heat exchange plate is connected to the heat exchange component. There is a flowing coolant or refrigerant in the heat exchange component. The coolant or refrigerant of the heat exchange component flows in the heat exchange plate of the battery pack 20, and can achieve heat exchange with the battery cells in the battery pack 20. Among them, the first communication module 111 is connected to the battery pack 20, and the first communication module 111 is used to read the first working information of the battery pack 20. The first working information may include the temperature information of the battery pack 20, the power information of the battery pack 20, etc. The first communication module 111 is also used to read the second working information of the battery pack 20, and the second working information may include the voltage difference information between each battery pack 20 in the energy storage system cabinet, the temperature difference information between each battery pack 20, etc. The second communication module 112 is used to enable the heat exchange module 10 to communicate with the control module 30. By setting the second communication module 112, the control module 30 can be connected to multiple heat exchange modules 10, and the control module 30 can jointly control multiple heat exchange modules 10. In a specific application scenario, the first working information includes the temperature information of the battery pack 20. When the control module 30 receives the temperature information of the battery pack 20 sent by the second communication module 112 and shows that the temperature of the battery pack 20 is too high, the control module 30 can individually control the heat exchange module 10 connected to the battery pack 20 to be in cooling mode, and change the power consumption of the cooling mode according to the temperature of the battery pack 20. In this way, each battery pack 20 can be efficiently and accurately managed according to the working status of the battery pack 20 and the energy storage system.

[0030] In some embodiments, the first working information includes one or more of the current information of the battery pack 20, the temperature information of the battery pack 20, and the power information of the battery pack 20. Specifically, the current information of the battery pack 20 reflects the magnitude of the charge and discharge current of the battery pack 20. The control module 30 can adjust the power of the heat exchange module 10 in the cooling mode according to the current information of the battery pack 20. For example, the greater the charge and discharge current, the greater the power of the heat exchange module 10 in the cooling mode controlled by the control module 30; the smaller the charge and discharge current, the smaller the power of the heat exchange module 10 in the cooling mode controlled by the control module 30. The temperature information of the battery pack 20 reflects the temperature of the battery pack 20. When the temperature of the battery pack 20 is too high, the control module 30 can control the heat exchange module 10 to be in the cooling mode. When the temperature of the battery pack 20 is too low, the control module 30 can control the heat exchange module 10 to be in the heating mode. The power information of the battery pack 20 can reflect the power level of the battery pack 20. When the thermal management device 100 supplies power to the battery pack 20 and the power information of the battery pack 20 shows that the power level of the battery pack 20 is low, the control module 30 can control the heat exchange module 10 to perform heating or cooling in a low power consumption mode.

[0031] Furthermore, in some embodiments, the first communication module 111 may be connected to a primary slave control (not shown) of the battery pack 20, which is mainly responsible for voltage monitoring, temperature monitoring, current monitoring, etc. of the battery pack 20. The first communication module 111 is connected to the primary slave control to facilitate acquisition of first working information reflecting the working state of the battery pack 20.

[0032] In some embodiments, the second working information includes one or more of the voltage difference information between the battery packs 20, the temperature difference information between the battery packs 20, the fire protection information of the energy storage system, and the power supply information. Specifically, the voltage difference information between the battery packs 20 reflects the voltage difference between the two battery packs 20. When the voltage difference between the battery packs 20 is too large, the difference in the charging and discharging efficiency of each battery pack 20 is large, which will shorten the overall life of the energy storage system. Among them, the control module 30 can control the heat exchange module 10 to heat the battery pack 20 with a larger voltage and cool the battery pack 20 with a smaller voltage. The temperature increase increases the internal resistance of the battery pack 20, and the voltage of the battery pack 20 will decrease. The temperature decreases the internal resistance of the battery pack 20, and the voltage of the battery pack 20 will increase, thereby reducing the voltage difference between the battery packs 20 of the energy storage system and improving the life of the energy storage system. The temperature difference information between the battery packs 20 reflects the size of the temperature difference between the two battery packs 20. When the temperature difference between the battery packs 20 is too large, it is not conducive to the stability of the energy storage system. The control module 30 can control the heat exchange module 10 to cool the battery pack 20 with a higher temperature and heat the battery pack 20 with a lower temperature. Thereby reducing the temperature difference between the battery packs 20 of the energy storage system. When the fire information of the energy storage system reflects that the energy storage system fire is triggered, the control module 30 can control the heat exchange module 10 to be in a strong cooling mode. The power supply information can reflect whether the thermal management device 100 is powered by the mains or by the battery pack 20. When the thermal management device 100 supplies power to the battery pack 20, and according to the power information of the battery pack 20, the power of the battery pack 20 is low, the control module 30 can control the heat exchange module 10 to heat or cool in a low power consumption mode.

[0033] Please refer to Figure 2 , Figure 2 yes Figure 1 Schematic diagram of the heat exchange module structure from the second perspective. Further, in some embodiments, the first communication module 111 is connected to the secondary master control of the energy storage system (not shown). Among them, the secondary master control of the energy storage system is also connected to the primary slave control of the battery pack 20, and the secondary master control aggregates the first working information of the primary slave control to obtain the second working information, and the first communication module 111 obtains the second working information through the secondary master control. In this embodiment, two first communication modules 111 are provided on the heat exchange component, and the two first communication modules 111 are used to connect the primary slave control and the secondary master control respectively.

[0034] In some embodiments, the first communication module 111 is a controller area network module; the second communication module 112 is a 485 communication module.

[0035] Please refer to Figure 3 and Figure 4 , Figure 3 yes Figure 1 Explosion diagram of the heat exchange module structure; Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure of the heat exchange module. In some embodiments, the heat exchange assembly includes a heat exchange body 113, a heat sink 116 and a heat dissipation fan 117. A heat exchange tube 114 is provided in the heat exchange body 113, and the heat exchange body 113 is used to be arranged on the battery pack 20, and the heat exchange tube 114 is connected to the liquid inlet and outlet 21 of the battery pack 20. Among them, a liquid pump 115 is provided on the heat exchange tube 114. The heat sink 116 is arranged on at least one side of the heat exchange body 113, and the heat sink 116 is connected to the heat exchange tube 114. The heat dissipation fan 117 is arranged on the heat exchange body 113, and the heat dissipation fan 117 is arranged corresponding to the heat sink 116. Specifically, the heat exchange tube 114 is used for circulating the refrigerant or coolant. When the heat exchange assembly is connected to the heat exchange plate of the battery pack 20, the two ends of the heat exchange tube 114 are connected to the liquid inlet and outlet 21 of the heat exchange plate. Among them, the heat exchange body 113 is a semiconductor material, heating plates are arranged on both sides of the heat exchange body 113, and the heat sink 116 is arranged on the heating plates. In the present embodiment, the heat sink 116 is a heat sink tooth, so as to improve the heat dissipation efficiency through the heat sink 116, wherein the heat dissipation efficiency of the heat sink 116 can be further improved by setting a heat dissipation fan 117. Among them, in the present embodiment, the heat exchange module 10 is arranged on the battery pack 20, and the two ends of the heat exchange tube 114 of the heat exchange assembly are directly connected to the liquid inlet and outlet 21 of the heat exchange plate. The thermal management device 100 is an integrated thermal management device 100. The thermal management device 100 does not need to be connected to the battery pack 20 through a water pipe, which reduces the risk of leakage. The thermal management device 100 is directly arranged on the battery pack 20 of the energy storage system, and can also reduce the space occupied by the thermal management device 100.

[0036] In some embodiments, the heat exchange assembly further includes a first power supply interface 118 and a second power supply interface (not shown), the first power supply interface 118 is provided on the heat exchange body 113, and the first power supply interface 118 is used to connect to the battery pack 20; the second power supply interface is provided on the heat exchange body 113, and the second power supply interface is used to connect to the mains. Specifically, by providing the first power supply interface 118 and the second power supply interface, the thermal management device 100 can be powered by both the mains and the battery pack 20, so that the thermal management device 100 can also work normally during a power outage.

[0037] In some embodiments, a display light 119 is also provided on the heat exchange assembly to display the working status and power level of the heat exchange module 10 through the display light 119. In some preferred embodiments, a control panel 120 is provided on the heat exchange assembly, and the first communication module 111, the second communication module 112 and the display light 119 are provided on the control panel 120.

[0038] Different from the prior art, the thermal management device 100 of the present application obtains the first working information of the battery pack 20 and the second working information of the energy storage system through the first communication module 111, and sends the first working information and the second working information to the control module 30 through the second communication module 112. The control module 30 can control the state of each heat exchange module 10 according to the first working information and the second working information, so that the energy storage system can efficiently and accurately manage each battery pack 20 according to the working state of the battery pack 20 and the energy storage system. On the other hand, the thermal management device 100 is an integrated thermal management device 100. The thermal management device 100 does not need to be connected to the battery pack 20 through a water pipe, which reduces the risk of leakage. The thermal management device 100 is directly set on the battery pack 20 of the energy storage system, which can also reduce the space occupied by the thermal management device 100. And by setting the first power supply interface 118 and the second power supply interface, the thermal management device 100 can be powered by AC power.

[0039] Correspondingly, the present application also provides a control method for a thermal management device, the control method is used to control the thermal management device described in any of the above embodiments, see Figure 7 , Figure 7 1 is a flow chart of an embodiment of a control method of a thermal management device of the present application. In a specific implementation, the control method includes: S11: The control module receives first operating information of each battery pack and second operating information of the energy storage system.

[0040] Specifically, the first communication module can be connected to the first-level slave control of the battery pack, and the first-level slave control of the battery pack is mainly responsible for voltage monitoring, temperature monitoring, current monitoring, etc. of the battery pack. The first communication module is connected to the first-level slave control to facilitate the acquisition of first working information reflecting the working status of the battery pack. The first communication module is also connected to the second-level master control of the energy storage system. Among them, the second-level master control of the energy storage system is also connected to the first-level slave control of the battery pack, and the second-level master control summarizes the first working information of the first-level slave control to obtain the second working information, and the first communication module obtains the second working information through the second-level master control. In this embodiment, the first working information includes one or more of the current information of the battery pack, the temperature information of the battery pack, and the power information of the battery pack; the second working information includes one or more of the voltage difference information between the battery packs, the temperature difference information between the battery packs, the fire protection information of the energy storage system, and the power supply information. S12: The control module controls the state of each heat exchange module according to the first working information and the second working information.

[0041] Specifically, the current information of the battery pack reflects the size of the charge and discharge current of the battery pack. The control module can adjust the power of the heat exchange module in the cooling mode according to the current information of the battery pack. For example, the larger the charge and discharge current, the larger the power of the heat exchange module in the cooling mode controlled by the control module; the smaller the charge and discharge current, the smaller the power of the heat exchange module in the cooling mode controlled by the control module. The temperature information of the battery pack reflects the temperature of the battery pack. When the temperature of the battery pack is too high, the control module can control the heat exchange module to be in the cooling mode. When the temperature of the battery pack is too low, the control module can control the heat exchange module to be in the heating mode. The power information of the battery pack can reflect the amount of power in the battery pack. When the thermal management device supplies power to the battery pack and the power information of the battery pack shows that the power of the battery pack is low, the control module can control the heat exchange module to heat or cool in a low power consumption mode. The voltage difference information between the battery packs reflects the voltage difference between the two battery packs. When the voltage difference between the battery packs is too large, it is not conducive to the stability of the energy storage system. The control module can control the heat exchange module to heat the battery pack with a larger voltage and cool the battery pack with a smaller voltage. The temperature increase increases the internal resistance of the battery pack, and the voltage of the battery pack increases. The temperature decreases the internal resistance of the battery pack and the voltage of the battery pack decreases, thereby reducing the voltage difference between the battery packs of the energy storage system, which is conducive to improving the stability of the energy storage system. The temperature difference information between the battery packs reflects the temperature difference between the two battery packs. When the temperature difference between the battery packs is too large, it is not conducive to the stability of the energy storage system. The control module can control the heat exchange module to cool the battery pack with a higher temperature and heat the battery pack with a lower temperature. Thereby reducing the temperature difference between the battery packs of the energy storage system. When the fire information of the energy storage system reflects that the fire protection of the energy storage system is triggered, the control module can control the heat exchange module to be in the strong cooling mode. The power supply information can reflect whether the thermal management device is powered by AC power or by a battery pack. When the thermal management device is powered by a battery pack and the battery pack power information shows that the battery pack power is low, the control module can control the heat exchange module to heat or cool in a low power consumption mode.

[0042] See also Figure 8 , Figure 8 yes Figure 7 In some embodiments, S12 may include: S121: The control module determines whether the battery pack is in a thermal runaway state based on the temperature information of the battery pack.

[0043] If the battery pack is in a thermal runaway state, execute S1211; if the battery pack is not in a thermal runaway state, execute S1212.

[0044] Specifically, judging whether the battery pack is in a thermal runaway state is a first-level judgment condition. When controlling the thermal management device, the judgment of whether the battery pack is in a thermal runaway state is first performed. In this embodiment, if the temperature of the battery pack is greater than 100 degrees Celsius, the battery pack is in a thermal runaway state. If the temperature of the battery pack is not greater than 100 degrees Celsius, the battery pack is not in a thermal runaway state. In some other embodiments, it is also possible to judge whether the battery pack is in a thermal runaway state based on whether the temperature of the battery pack is greater than 95 degrees, 105 degrees, 110 degrees or other reasonable temperatures. Among them, the energy storage system includes a plurality of battery packs, and each battery pack is connected to a heat exchange module. In this embodiment, the control module executes S1211 on the heat exchange module connected to the battery pack in a thermal runaway state. The control module executes S1212 on the heat exchange module connected to the battery pack that is not in a thermal runaway state.

[0045] S1211: The control module controls the heat exchange module to be in strong cooling mode.

[0046] In this embodiment, the strong cooling mode of the heat exchange module means that the heat exchange module is in cooling mode with 100% power.

[0047] Furthermore, in some embodiments, the first-level judgment condition also includes judging whether the energy storage system is triggered by fire according to the fire information of the energy storage system. If the energy storage system is triggered by fire, the control module also controls the heat exchange module to be in the strong cooling mode.

[0048] Furthermore, in some embodiments, after S1211, the control method further includes: in response to the temperature of the battery pack being no greater than the first preset temperature, the control module controls the heat exchange module to shut down. Specifically, if the temperature of the battery pack is no greater than the first preset temperature, it means that the battery pack is no longer in a thermal runaway state and the fire protection trigger of the energy storage system has been released, and the heat exchange module can be controlled to stop cooling. In this embodiment, the first preset temperature is 45 degrees Celsius. In some other embodiments, the first preset temperature can also be 42 degrees Celsius, 44 degrees Celsius, 47 degrees Celsius or other reasonable temperatures.

[0049] S1212: The control module determines whether the heat exchange module is in a battery pack power supply state according to the power supply information of the energy storage system.

[0050] If the heat exchange module is not powered by the battery pack, execute S1213; if the heat exchange module is powered by the battery pack, execute S1214.

[0051] Specifically, the power supply mode of the heat exchange module is judged to be a secondary judgment condition, and the control module first executes the judgment of the primary judgment condition and then executes the judgment of the secondary judgment condition. In the present application, the thermal management device has a first power supply interface and a second power supply interface. The heat exchange module can be powered by the battery pack of the energy storage system through the first power supply interface, and the heat exchange module can also be powered by the mains through the second power supply interface.

[0052] S1213: The control module controls the heat exchange module to be in normal mode.

[0053] This step is performed when the heat exchange module is in a mains power supply state. The heat exchange module is in a normal mode, which means that the heat exchange module performs heating or cooling at normal power.

[0054] S1214: The control module determines whether the power of the battery pack is greater than a preset power according to the power information of the battery pack.

[0055] If the power of the battery pack is greater than the preset power, execute S1215; if the power of the battery pack is not greater than the preset power, execute S1216.

[0056] In this embodiment, the preset power level is 20% of the power level. In some other embodiments, the preset power level may be 18%, 19%, 21%, 22%, or other reasonable power levels.

[0057] S1215: The control module controls the heat exchange module to be in a low power consumption mode.

[0058] When the power of the battery pack is greater than the preset power, it means that the battery pack has sufficient power to supply the electrical devices connected to the energy storage system and the heat exchange module for normal operation. The control module controls the heat exchange module to continue heating or cooling. At the same time, the control module controls the heat exchange module to be in low power consumption mode for heating or cooling, so as to reduce the consumption of battery pack power when the heat exchange module is powered by the battery pack.

[0059] S1216: The control module controls the heat exchange module to shut down.

[0060] When the power of the battery pack is not greater than the preset power, it means that the power of the battery pack is insufficient for the power consumption device and the heat exchange module to work at the same time. Since the first-level judgment condition has been executed, the battery pack is not in a thermal runaway state and the energy storage system is not triggered by a fire, the control module controls the heat exchange module to shut down to reduce the power consumption of the battery pack. Among them, after the control module controls the heat exchange module to shut down, the first-level judgment condition is still executed. If the battery pack enters a thermal runaway state or the energy storage system is triggered by a fire, the control module controls the heat exchange module to be in a strong cooling mode.

[0061] In some embodiments, after S1216, the control method further includes executing a third-level judgment condition, where the third-level judgment condition is to judge the temperature of the battery pack.

[0062] Among them, in response to the temperature of the battery pack being less than the second preset temperature, the control module controls the heat exchange module to be in heating mode; in response to the temperature of the battery pack being greater than the third preset temperature, the control module controls the heat exchange module to be in cooling mode. Specifically, the third-level judgment condition is executed after the second-level judgment condition is executed. In this embodiment, the second preset temperature is 10 degrees Celsius, and the third preset temperature is 45 degrees Celsius. When the battery pack temperature is less than the second preset temperature, the battery pack is heated, and when the battery pack temperature is greater than the third preset temperature, the battery pack is cooled to reduce the safety risks caused by overheating or overcooling of the battery pack.

[0063] In response to the temperature of the battery pack being greater than the fourth preset temperature and less than the fifth preset temperature, the control module determines whether the temperature difference between the battery packs is greater than the preset temperature difference, or whether the voltage difference between the battery packs is greater than the preset voltage difference; if the temperature difference between the battery packs is greater than the preset temperature difference, or the voltage difference between the battery packs is greater than the preset voltage difference, the control module controls the heat exchange module to be in a balanced mode; wherein the third preset temperature is greater than the fifth preset temperature, and the fourth preset temperature is greater than the second preset temperature. Specifically, in this embodiment, the fourth preset temperature is 15 degrees Celsius, and the fifth preset temperature is 35 degrees Celsius.

[0064] When the temperature of the battery pack is greater than the fourth preset temperature and less than the fifth preset temperature, it means that the battery pack has no risk of overheating or overcooling, and the third-level judgment condition for judging the temperature of the battery pack is completed, and then the fourth-level judgment condition and the fifth-level judgment condition are executed. Among them, the fourth-level judgment condition is the temperature difference judgment between the battery packs, and the fifth-level judgment condition is the voltage difference judgment between the battery packs. When the temperature difference between the battery packs is large, it is easy for the aging speed of each battery pack in the energy storage system to be inconsistent, affecting the service life of the entire energy storage system. When the fourth-level judgment condition is executed and it is determined that the temperature difference between the battery packs is greater than the preset temperature difference, the control module controls the heat exchange module to be in the balance mode. In this embodiment, the preset temperature difference is 4 degrees Celsius. Please refer to Fig. 9 , Fig. 9 The present invention is a flow chart of an embodiment of the control method of the present invention, in which the control module controls the heat exchange module to be in the balancing mode when the temperature difference between the battery packs is greater than the preset temperature difference. In a specific embodiment, when the temperature difference between the battery packs is greater than the preset temperature difference, the control module controls the heat exchange module to be in the balancing mode, specifically including: S131: The control module determines the battery pack with the highest temperature and the battery pack with the lowest temperature.

[0065] S132: The control module controls the heat exchange module on the battery pack with the highest temperature to be in cooling mode, and the control module controls the heat exchange module on the battery pack with the lowest temperature to be in heating mode.

[0066] In this embodiment, in the balancing mode, the cooling mode performs cooling at 60% power, and the heating mode performs heating at 60% power. When the temperature difference between the battery packs is no more than 4 degrees Celsius, the control module controls the heat exchange module to exit the balancing mode.

[0067] When the fifth level judgment condition is executed and it is judged that the voltage difference between the battery packs is greater than the preset voltage difference, the control module controls the heat exchange module to be in the balance mode. In this embodiment, the preset voltage difference is 200 millivolts. Fig.10 , Fig.10 The present invention is a flow chart of an embodiment of the control method of the present invention, in which the control module controls the heat exchange module to be in the balancing mode when the voltage difference between the battery packs is greater than the preset voltage difference. In a specific embodiment, when the voltage difference between the battery packs is greater than the preset voltage difference, the control module controls the heat exchange module to be in the balancing mode, specifically including: S141: The control module determines the battery pack with the highest voltage and the battery pack with the lowest voltage.

[0068] S142: The control module controls the heat exchange module on the battery pack with the highest voltage to be in a heating mode, and the control module controls the heat exchange module on the battery pack with the lowest voltage to be in a cooling mode.

[0069] Specifically, in this embodiment, in the balancing mode, the cooling mode performs cooling at 10% power, and the heating mode performs heating at 10% power. The battery pack with lower voltage is cooled, and the battery pack with higher voltage is heated. The temperature rises to increase the internal resistance of the battery pack, and the voltage of the battery pack will become smaller. The temperature drop reduces the internal resistance of the battery pack, and the voltage of the battery pack will become larger, thereby reducing the voltage difference between the battery packs of the energy storage system, which is beneficial to improving the stability of the operation of the energy storage system. In this embodiment, when the voltage difference between the battery packs is not greater than 200 millivolts, the control module controls the heat exchange module to exit the balancing mode.

[0070] Further, in some embodiments, after executing the fourth-level judgment condition and the fifth-level judgment condition, if the temperature difference between the battery packs of the energy storage system is not greater than the preset temperature difference, and the voltage difference between the battery packs is not greater than the preset voltage difference, the control module controls the heat exchange module to be in the follow-up mode. In a specific embodiment, the step of the control module controlling the heat exchange module to be in the follow-up mode specifically includes: the control module obtains the current information of the battery pack, and the control module controls the power of the heat exchange module in the cooling mode according to the current information; wherein, the greater the current of the battery pack, the greater the power of the cooling mode. By controlling the heat exchange module to enter the follow-up mode, the power of the heat exchange module can be adjusted according to the size of the battery pack current, which can reduce energy consumption.

[0071] Furthermore, in some embodiments, after controlling the heat exchange module to enter the follow-up mode, if in the follow-up mode, the voltage difference between the battery packs is greater than the preset voltage difference, or the temperature difference between the battery packs is greater than the preset temperature difference, the control module further controls the heat exchange module to enter the balancing mode, so that the heat exchange module is in the balancing mode and the follow-up mode at the same time. In a specific embodiment, if the voltage difference between the battery packs is greater than the preset voltage difference, the low-voltage battery pack is cooled. If the battery pack is currently discharging at 50% of the rated current, the cooling power in the follow-up mode is 50%. At this moment, the battery pack is cooled at 10% power in the balancing mode, and the cooling power in the balancing mode is added to the cooling power in the follow-up mode, and the battery pack is cooled at 60% power.

[0072] Correspondingly, the present application also proposes a controller, see Fig.11 , Fig.11 4 is a block diagram of a controller of the present application. The controller 40 includes a processor 401 and a memory 402 connected to each other; wherein the memory 402 stores program instructions, and the processor 401 retrieves the program instructions from the memory 402 to execute the steps of the control method of the above embodiment.

[0073] Specifically, the processor 401 is used to control itself and the memory 402 to implement the steps of any of the above control method embodiments. The processor 401 can also be called a CPU (Central Processing Unit). The processor 401 may be an integrated circuit chip with signal processing capabilities. The processor 401 can also be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field-programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. In addition, the processor 401 can be implemented by an integrated circuit chip.

[0074] For specific contents of the control method implemented by the processor 401 of the present application, please refer to the contents in the control method embodiment of the above-mentioned thermal management device, which will not be repeated here.

[0075] Correspondingly, the present application also proposes a computer-readable storage medium, see Fig.12 , Fig.12The computer-readable storage medium 50 stores program instructions 500, which implement the steps of the control method in any of the above embodiments when executed by a processor.

[0076] The computer-readable storage medium 50 may specifically be a medium that can store the program instructions 500, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or may be a server that stores the program instructions 500. The server may send the stored program instructions 500 to other devices for execution, or may execute the stored program instructions 500 by itself.

[0077] The above description is only an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A thermal management device, characterized in that: The thermal management device includes a control module and a plurality of heat exchange modules, wherein the heat exchange modules include: A heat exchange component, the heat exchange component is used to exchange heat with a battery pack of an energy storage system; A first communication module, the first communication module is arranged on the heat exchange component, the first communication module is used to connect to the battery pack, and the first communication module is used to obtain first working information of the battery pack and second working information of the energy storage system; a second communication module, the second communication module being disposed on the heat exchange component, the second communication module being connected to the control module, the second communication module being used to send the first working information and the second working information to the control module, and the control module also controlling the state of the heat exchange module through the second communication module; Wherein, the control module controls the state of each of the heat exchange components according to the first working information and the second working information.

2. The thermal management device according to claim 1, characterized in that: The first working information includes one or more of the current information of the battery pack, the temperature information of the battery pack and the power information of the battery pack; the second working information includes one or more of the voltage difference information between the battery packs, the temperature difference information between the battery packs, the fire protection information and the power supply information of the energy storage system.

3. The thermal management device according to claim 1, characterized in that: The first communication module is a controller area network module; the second communication module is a 485 communication module.

4. The thermal management device according to claim 1, characterized in that: The heat exchange component comprises: A heat exchange body, wherein a heat exchange tube is disposed in the heat exchange body, the heat exchange body is used to be disposed on the battery pack, and the heat exchange tube is communicated with the liquid inlet and outlet of the battery pack; wherein a liquid pump is disposed on the heat exchange tube; A heat sink, the heat sink being arranged on at least one side of the heat exchange body and connected to the heat exchange tube; A heat dissipation fan is arranged on the heat exchange main body, and the heat dissipation fan is arranged corresponding to the heat dissipation element.

5. The thermal management device according to claim 4, characterized in that: The heat exchange component also includes: A first power supply interface, which is arranged on the heat exchange body and is used to connect to a battery pack; A second power supply interface, wherein the second power supply interface is arranged on the heat exchange main body, and the second power supply interface is used to connect to the mains.

6. A control method for a thermal management device, the control method being used to control the thermal management device according to any one of claims 1 to 5, characterized in that: The control method comprises: The control module receives first operating information of each battery pack and second operating information of the energy storage system; The control module controls the state of each of the heat exchange modules according to the first working information and the second working information.

7. The control method according to claim 6, characterized in that: The step of controlling the state of each of the heat exchange modules according to the first working information and the second working information by the control module specifically includes: The control module determines whether the battery pack is in a thermal runaway state according to the temperature information of the battery pack; If the battery pack is in a thermal runaway state, the control module controls the heat exchange module to be in a strong cooling mode; If the battery pack is not in the thermal runaway state, the control module determines the power supply mode of the heat exchange module according to the power supply information of the energy storage system; If the heat exchange module is in a mains power supply state, the control module controls the heat exchange module to be in a normal mode; If the heat exchange module is in a battery pack power supply state, the control module determines whether the power of the battery pack is greater than a preset power according to the power information of the battery pack; If the power of the battery pack is greater than the preset power, the control module controls the heat exchange module to be in a low power consumption mode; if the power of the battery pack is not greater than the preset power, the control module controls the heat exchange module to shut down.

8. The control method according to claim 7, characterized in that: The control method further comprises: In response to the energy storage system fire protection trigger, the control module controls the heat exchange module to be in a strong cooling mode.

9. The control method according to claim 7 or 8, characterized in that: After the step of controlling the heat exchange module to be in the strong cooling mode, the method further includes: In response to the temperature of the battery pack being not greater than a first preset temperature, the control module controls the heat exchange module to shut down.

10. The control method according to claim 7, characterized in that: The control method further comprises: In response to the temperature of the battery pack being lower than a second preset temperature, the control module controls the heat exchange module to be in a heating mode; In response to the temperature of the battery pack being greater than a third preset temperature, the control module controls the heat exchange module to be in a cooling mode; In response to the temperature of the battery pack being greater than a fourth preset temperature and less than a fifth preset temperature, the control module determines whether the temperature difference between the battery packs is greater than a preset temperature difference, or whether the voltage difference between the battery packs is greater than a preset voltage difference; if the temperature difference between the battery packs is greater than the preset temperature difference, or the voltage difference between the battery packs is greater than the preset voltage difference, the control module controls the heat exchange module to be in a balancing mode; Wherein, the third preset temperature is greater than the fifth preset temperature, and the fourth preset temperature is greater than the second preset temperature.

11. The control method according to claim 10, characterized in that: The step of controlling the heat exchange module to be in a balanced mode by the control module specifically includes: In response to the temperature difference between the battery packs being greater than a preset temperature difference; the control module determines the battery pack with the highest temperature and the battery pack with the lowest temperature; The control module controls the heat exchange module on the battery pack with the highest temperature to be in a cooling mode, and the control module controls the heat exchange module on the battery pack with the lowest temperature to be in a heating mode.

12. The control method according to claim 11, characterized in that: The step of controlling the heat exchange module to be in a balanced mode by the control module further includes: In response to the voltage difference between the battery packs being greater than a preset voltage difference; the control module determines the battery pack with the highest voltage and the battery pack with the lowest voltage; The control module controls the heat exchange module on the battery pack with the highest voltage to be in a heating mode, and the control module controls the heat exchange module on the battery pack with the lowest voltage to be in a cooling mode.

13. The control method according to claim 12, characterized in that: The control method further comprises: If the temperature difference between the battery packs is not greater than a preset temperature difference, and the voltage difference between the battery packs is not greater than a preset voltage difference, the control module controls the heat exchange module to be in a follow-up mode.

14. The control method according to claim 13, characterized in that: The step of controlling the heat exchange module to be in a follow-up mode by the control module specifically includes: The control module obtains the current information of the battery pack, and controls the power of the heat exchange module in the cooling mode according to the current information; wherein, the greater the current of the battery pack, the greater the power of the cooling mode is controlled.

15. A controller, characterized in that: It comprises a processor and a memory connected to each other; wherein the memory stores program instructions, and the processor retrieves the program instructions from the memory to execute the control method as described in any one of claims 6-14.

16. A computer-readable storage medium, characterized in that: Program instructions are stored thereon, and when the program instructions are executed by a processor, a control method as described in any one of claims 6 to 14 is implemented.

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