Battery management method, control device, terminal device, medium and program product

Abstract

This application provides a battery management method, control device, terminal equipment, medium, and program product. It acquires ambient temperature parameters and cooling medium temperature parameters. The ambient temperature parameters are obtained based on the ambient temperature of the target energy storage system, and the cooling medium temperature parameters are obtained based on the cooling medium temperature of the thermal management circuit of the target energy storage system. Then, it performs thermal management on the target energy storage system based on the ambient temperature parameters and cooling medium temperature parameters, thereby addressing the differences in heat generation power of different energy storage systems during charging and discharging, meeting the heat dissipation requirements of different energy storage systems, and improving heat dissipation efficiency.

Description

Technical Field

[0001] This application relates to the field of energy storage, and more particularly to a battery management method, control device, terminal equipment, medium, and program product. Background Technology

[0002] Large-scale grid connection has gradually increased the requirements for the flexibility of energy storage systems. The use of mixed energy storage batteries can not only make full use of the advantages of different types of cells, but also avoid their respective disadvantages through reasonable energy storage management strategies, thereby effectively reducing system costs and improving response speed and service life.

[0003] However, different energy storage batteries have significantly different heat generation power during charging and discharging, so how to meet the heat exchange requirements of different energy storage batteries is a crucial issue. Summary of the Invention

[0004] This application provides battery management methods, control devices, terminal equipment, media, and program products to improve the heat exchange efficiency of energy storage batteries.

[0005] In a first aspect, embodiments of this application provide a battery management method, the method comprising:

[0006] The ambient temperature parameters and cooling medium temperature parameters are obtained. The ambient temperature parameters are obtained based on the ambient temperature of the target energy storage system, and the cooling medium temperature parameters are obtained based on the cooling medium temperature of the thermal management loop of the target energy storage system.

[0007] Thermal management of the target energy storage system is performed based on the ambient temperature parameters and the cooling medium temperature parameters.

[0008] In one possible implementation, the thermal management of the target energy storage system based on the ambient temperature parameters and the cooling medium temperature parameters includes:

[0009] The thermal management mode is determined based on the ambient temperature parameters and the cooling medium temperature parameters.

[0010] Thermal management is performed on the target energy storage system according to the thermal management mode.

[0011] In one possible implementation, determining the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters includes:

[0012] The ambient temperature parameter corresponds to a first temperature range, and the cooling medium temperature parameter corresponds to a second temperature range, thus determining the thermal management mode as a heating mode.

[0013] In one possible implementation, the first temperature range is a temperature range less than 0°C, and the second temperature range is a temperature range less than 15°C.

[0014] Alternatively, the first temperature range is a temperature range greater than or equal to 0°C and less than 10°C, and the second temperature range is a temperature range less than 15°C;

[0015] Alternatively, the first temperature range is a temperature range less than 0°C, and the second temperature range is a temperature range greater than or equal to 15°C and less than or equal to 19°C.

[0016] In one possible implementation, the thermal management of the target energy storage system according to the thermal management mode includes:

[0017] The first device is controlled to be in heating mode to heat the target energy storage system.

[0018] In one possible implementation, determining the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters includes:

[0019] The ambient temperature parameter corresponds to the third temperature range, and the cooling medium temperature parameter corresponds to the fourth temperature range, thus determining the thermal management mode as the first cooling mode.

[0020] In one possible implementation, the third temperature range is a temperature range greater than or equal to 10°C and less than 19°C, and the fourth temperature range is a temperature range less than 15°C.

[0021] Alternatively, the third temperature range is a temperature range greater than or equal to 0°C and less than 10°C, and the fourth temperature range is a temperature range greater than or equal to 15°C and less than 19°C.

[0022] Alternatively, the third temperature range is a temperature range less than 0°C, and the fourth temperature range is a temperature range greater than or equal to 15°C and less than or equal to 19°C.

[0023] In one possible implementation, the thermal management of the target energy storage system according to the thermal management mode includes:

[0024] The second device is controlled to be in heat dissipation mode to cool down the target energy storage system.

[0025] In one possible implementation, determining the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters includes:

[0026] The ambient temperature parameter corresponds to the fifth temperature range, and the cooling medium temperature parameter corresponds to the sixth temperature range, thus determining the thermal management mode as the second cooling mode.

[0027] In one possible implementation, the fifth temperature range is a temperature range greater than or equal to 10°C and less than or equal to 19°C, and the sixth temperature range is a temperature range greater than 19°C.

[0028] Alternatively, the fifth temperature range is a temperature range greater than or equal to 10°C and less than or equal to 19°C, and the sixth temperature range is a temperature range greater than or equal to 15°C and less than or equal to 19°C.

[0029] Alternatively, the fifth temperature range is a temperature range greater than or equal to 0°C and less than 10°C, and the sixth temperature range is a temperature range greater than 19°C.

[0030] In one possible implementation, thermal management of the target energy storage system according to the thermal management mode includes:

[0031] The first and second devices are controlled to be in heat dissipation mode to cool down the target energy storage system. The heat exchange efficiency of the first device is greater than that of the second device.

[0032] In one possible implementation, determining the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters includes:

[0033] The ambient temperature parameter corresponds to the seventh temperature range, and the cooling medium temperature parameter corresponds to the eighth temperature range, thus determining the thermal management mode as the third cooling mode.

[0034] In one possible implementation, the seventh temperature range and the eighth temperature range are temperature ranges greater than 19°C.

[0035] Alternatively, the seventh temperature range is a temperature range greater than or equal to 10°C and less than or equal to 19°C, and the eighth temperature range is a temperature range greater than 19°C.

[0036] In one possible implementation, the thermal management of the target energy storage system according to the thermal management mode includes:

[0037] The first device is controlled to be in heat dissipation mode to cool down the target energy storage system.

[0038] In one possible implementation, determining the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters includes:

[0039] The ambient temperature parameter corresponds to the ninth temperature range, and the cooling medium temperature parameter corresponds to the tenth temperature range, thus determining the thermal management mode as the uniform temperature mode.

[0040] In one possible implementation, the ninth temperature range is a temperature range greater than or equal to 10°C and less than 19°C, and the tenth temperature range is a temperature range greater than or equal to 15°C and less than 19°C.

[0041] Alternatively, the ninth temperature range is a temperature range greater than or equal to 0°C and less than 10°C, and the tenth temperature range is a temperature range greater than 19°C;

[0042] Alternatively, the ninth temperature range is a temperature range greater than or equal to 0°C and less than 10°C, and the tenth temperature range is a temperature range less than 0°C; or the ninth temperature range is a temperature range less than 0°C, and the tenth temperature range is a temperature range greater than or equal to 15°C and less than or equal to 19°C.

[0043] In one possible implementation, the thermal management of the target energy storage system according to the thermal management mode includes:

[0044] Control the first and second devices to stop operating;

[0045] The cooling medium of the non-target energy storage system is controlled to cool the target energy storage system, or the cooling medium of the target energy storage system is controlled to mix in order to cool the target energy storage system.

[0046] In one possible implementation, the target energy storage system includes at least one of a sodium battery, a lithium battery, and a manganese-based lithium battery. In a second aspect, this application provides a control device, including: a memory and a processor;

[0047] The memory stores computer-executed instructions;

[0048] The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in the first aspect.

[0049] Thirdly, this application provides a terminal device including the control device described in the second aspect.

[0050] In one possible implementation, it further includes: a heat exchange device connected to the energy storage system and the control device;

[0051] The control device is used to determine the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters, and to determine the functional mode of the heat exchange device based on the thermal management mode.

[0052] The heat exchange device is used to perform thermal management on the target energy storage system according to the functional mode.

[0053] In one possible implementation, the heat exchange device includes a first device and a second device, wherein the heat exchange efficiency of the first device is greater than that of the second device.

[0054] In one possible implementation, the first device includes an air conditioning heat exchanger, and the second device includes an air-cooled heat exchanger.

[0055] In one possible implementation, the air-cooled heat exchanger includes a first fan and a first heat exchanger, the first fan being connected to the control device, a first end of the first heat exchanger being connected to a first end of each of the energy storage systems, and a second end of the first heat exchanger being connected to a second end of each of the energy storage systems.

[0056] The control device is used to control the operation of the first fan and to control the first heat exchanger to connect to the thermal management circuit of the target energy storage system, so as to control the air-cooled heat exchanger to be in heat dissipation mode, or to control the first fan to stop operating and to control the first heat exchanger to be bypassed, so as to control the air-cooled heat exchanger to stop operating.

[0057] In one possible implementation, the air conditioning heat exchanger includes: a second fan, a condenser, a compressor, a second heat exchanger, and a throttling valve;

[0058] The first end of the condenser is connected to the first end of the compressor, the second end of the compressor is connected to the first end of the second heat exchanger, the second end of the second heat exchanger is connected to the first end of the throttle valve, and the second end of the throttle valve is connected to the second end of the condenser.

[0059] The third end of the second heat exchanger is connected to the air conditioning heat exchanger, and the fourth end of the second heat exchanger is connected to the second end of each of the energy storage systems;

[0060] The control device is used to control the operation of the second fan, the condenser and the compressor, and to control the throttle valve to open, and to control the second heat exchanger to connect to the thermal management circuit of the target energy storage system so as to control the air conditioning heat exchanger to be in heat dissipation mode, or to control the second fan, the condenser and the compressor to stop operating, and to control the second heat exchanger to be bypassed so as to control the air conditioning heat exchanger to stop operating.

[0061] In one possible implementation, the second heat exchanger includes a heating unit;

[0062] The control device is also used to control the second fan, the condenser and the compressor to stop operating, and to control the heating unit to heat up, so as to control the air conditioner heat exchanger to be in heating mode.

[0063] In one possible implementation, the heat exchange device includes: a first three-way switch;

[0064] The first end of the first three-way switch is connected to the first end of each of the energy storage systems, the second end of the first three-way switch is connected to the first end of the first heat exchanger, the third end of the first three-way switch is connected to the second end of the first heat exchanger, and the fourth end of the first three-way switch is connected to the control device.

[0065] The control device is used to control the operating mode of the first three-way switch, so as to control whether the first heat exchanger is bypassed.

[0066] In one possible implementation, the heat exchange device includes: a first temperature sensor;

[0067] The first temperature sensor is disposed in the thermal management circuit of the target energy storage system between the first three-way switch and the first terminal of each energy storage system, and the first temperature sensor is connected to the control device.

[0068] The first temperature sensor is used to detect the temperature of the cooling medium in the thermal management loop of the target energy storage system and send it to the control device;

[0069] The control device is used to control the operating mode of the first three-way switch according to the ambient temperature parameter and the cooling medium temperature sent by the first temperature sensor.

[0070] In one possible implementation, the heat exchange device includes: a second three-way switch;

[0071] The first end of the second three-way switch is connected to the second end of the second device, the second end of the second three-way switch is connected to the third end of the second heat exchanger, the third end of the second three-way switch is connected to the fourth end of the second heat exchanger, and the fourth end of the second three-way switch is connected to the control device.

[0072] The control device is used to control the operating mode of the second three-way switch, so as to control whether the second heat exchanger is bypassed.

[0073] In one possible implementation, the heat exchange device includes: a second temperature sensor;

[0074] The second temperature sensor is disposed between the second device and the second three-way switch in the thermal management circuit of the target energy storage system, and the second temperature sensor is connected to the control device;

[0075] The second temperature sensor is used to detect the temperature of the cooling medium in the thermal management loop of the target energy storage system and send it to the control device;

[0076] The control device is used to control the operating mode of the second three-way switch based on the temperature of the cooling medium sent by the second temperature sensor.

[0077] In one possible implementation, it also includes:

[0078] The third temperature sensor and the third three-way switch;

[0079] The third temperature sensor is disposed between the second device and the second end of each of the energy storage systems, and the third temperature sensor is connected to the control device;

[0080] The third temperature sensor is used to detect the temperature of the cooling medium in the thermal management loop of the target energy storage system and send it to the control device.

[0081] The control device is used to control the operating mode of the third three-way switch according to the cooling medium temperature sent by the third temperature sensor, so as to control whether the cooling medium flows back to the corresponding energy storage system.

[0082] In one possible implementation, the heat exchange device includes:

[0083] At least one shut-off valve, the first end of each shut-off valve is connected to the first end of the corresponding energy storage system, the second end of each shut-off valve is connected to the heat exchange device, and the third end of each shut-off valve is connected to the control device;

[0084] The control device is used to control the on / off state of the shut-off valve, so as to control whether the cooling medium of the energy storage system flows to the heat exchange device.

[0085] In one possible implementation, the heat exchange device includes:

[0086] At least one power pump, the first end of each power pump is connected to the second end of the corresponding energy storage system, and the second end of each power pump is connected to the first device;

[0087] The control device is used to control the power pump to be in working mode so as to drive the circulation of the cooling medium in the thermal management circuit.

[0088] In one possible implementation, the number of the target energy storage systems is multiple;

[0089] The control device is used to control the power pump corresponding to each of the target energy storage systems to operate in a first mode, so as to mix the cooling medium in the thermal management circuit of each target energy storage system;

[0090] The control device is also used to control the power pump corresponding to each of the target energy storage systems to operate in the second mode, obtain the cooling medium mixing temperature of multiple target energy storage systems, and perform thermal management on the target energy storage systems according to the ambient temperature and the cooling medium mixing temperature.

[0091] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect.

[0092] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0093] The battery management method, control device, terminal equipment, medium, and program product provided in this application acquire ambient temperature parameters and cooling medium temperature parameters. The ambient temperature parameters are obtained based on the ambient temperature of the target energy storage system, and the cooling medium temperature parameters are obtained based on the cooling medium temperature of the thermal management loop of the target energy storage system. Then, thermal management is performed on the target energy storage system based on the ambient temperature parameters and cooling medium temperature parameters, thereby improving the accuracy of thermal management and the heat exchange efficiency of the energy storage system. Attached Figure Description

[0094] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0095] Figure 1 Flowchart of the battery thermal management method provided in this application Figure 1 ;

[0096] Figure 2 A schematic diagram of the control device provided in this application;

[0097] Figure 3 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application;

[0098] Figure 4 This is a schematic diagram of the structure of a terminal device provided in another embodiment of this application;

[0099] Figures 5-9 This is a schematic diagram illustrating the operation of a single energy storage system as provided in an embodiment of this application.

[0100] Figures 10-14 This is a schematic diagram illustrating the operation of the dual energy storage system provided in this application embodiment.

[0101] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0102] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0103] As described in the background technology, large-scale grid connection has gradually increased the requirements for the flexibility of energy storage systems. The mixed use of energy storage batteries can not only make full use of the advantages of different types of cells, but also avoid their respective disadvantages through reasonable energy storage management strategies, effectively reducing system costs and improving configuration flexibility, response speed and service life.

[0104] For example, sodium batteries have advantages such as low cost, high safety, good low-temperature performance, and long cycle life, but their energy density is low, making them unsuitable for high-power charging and discharging. Manganese-based lithium batteries have advantages such as high operating voltage and no voltage plateau period, but their cycle life is limited, failing to meet the lifespan requirements of energy storage products.

[0105] Therefore, sodium batteries and manganese-based lithium batteries can be used together to form an energy storage system by leveraging their strengths and mitigating their weaknesses through a reasonable energy management system.

[0106] However, sodium batteries and manganese-based lithium batteries have significant differences in heat generation power during charging and discharging. Currently, the main solution to this problem is to set up independent heat dissipation systems for sodium batteries and manganese-based lithium batteries. However, setting up independent heat dissipation systems results in higher power consumption for these systems.

[0107] Therefore, this application provides a battery management method that obtains ambient temperature parameters and cooling medium temperature parameters, and performs thermal management on the target energy storage system based on the ambient temperature parameters and cooling medium temperature parameters. This method can address the differences in heat generation power of different energy storage systems during charging and discharging, meet the heat dissipation requirements of different energy storage systems, and improve heat dissipation efficiency.

[0108] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0109] Figure 1 A flowchart illustrating the battery thermal management method provided in this application is shown below. Figure 1 As shown, the method includes:

[0110] S101. Obtain ambient temperature parameters and cooling medium temperature parameters. The ambient temperature parameters are obtained based on the ambient temperature of the target energy storage system, and the cooling medium temperature parameters are obtained based on the cooling medium temperature of the thermal management loop of the target energy storage system.

[0111] For example, the target energy storage system can be an operational energy storage system, and the number of target energy storage systems can be one or more. The energy storage system can include battery cabinets; multiple energy storage systems can have multiple battery cabinets of the same type or different types. For example, the battery cabinet can be a sodium battery energy storage container, a manganese-based lithium battery energy storage container, a lithium battery energy storage container, etc.

[0112] For example, the ambient temperature parameter can be the temperature range corresponding to the ambient temperature of the target energy storage system, and the cooling medium temperature parameter can be the temperature range corresponding to the cooling medium temperature of the thermal management loop of the target energy storage system. Accordingly, the ambient temperature parameter can be obtained based on the ambient temperature of the target energy storage system, and the cooling medium temperature parameter can be determined based on the cooling medium temperature of the thermal management loop of the target energy storage system. The cooling medium can be, for example, cooling water or other coolants.

[0113] S102. Perform thermal management on the target energy storage system based on ambient temperature parameters and cooling medium temperature parameters.

[0114] In some embodiments, considering that different energy storage systems may have different heat generation power during charging and discharging, the cooling medium temperature parameters may also differ. Therefore, a thermal management mode is determined based on the ambient temperature parameters and the cooling medium temperature parameters, and then thermal management is performed on the target energy storage system according to the thermal management mode. This can take into account the flexible operation of different energy storage systems and meet the heat exchange requirements of different energy storage systems.

[0115] In some examples, when the ambient temperature parameter corresponds to a first temperature range and the cooling medium temperature parameter corresponds to a second temperature range, the thermal management mode is determined to be a heating mode, thereby enabling the target energy storage system to be heated.

[0116] For example, the first temperature range can be a temperature range less than 0°C, and the second temperature range can be a temperature range less than 15°C; or, the first temperature range can be a temperature range greater than or equal to 0°C and less than 10°C, and the second temperature range can be a temperature range less than 15°C; or, the first temperature range can be a temperature range less than 0°C, and the second temperature range can be a temperature range greater than or equal to 15°C and less than or equal to 19°C.

[0117] Accordingly, the first type of heat exchange device can be controlled to be in heating mode to heat the target energy storage system and meet the heating requirements of the target energy storage system.

[0118] In some examples, when the ambient temperature parameter corresponds to the third temperature range and the cooling medium temperature parameter corresponds to the fourth temperature range, the thermal management mode is determined to be the first cooling mode, thereby enabling the target energy storage system to be cooled.

[0119] For example, the third temperature range can be a temperature range greater than or equal to 10°C and less than 19°C, and the fourth temperature range can be a temperature range less than 15°C; or, the third temperature range can be a temperature range greater than or equal to 0°C and less than 10°C, and the fourth temperature range can be a temperature range greater than or equal to 15°C and less than 19°C; or, the third temperature range can be a temperature range less than 0°C, and the fourth temperature range can be a temperature range greater than or equal to 15°C and less than or equal to 19°C.

[0120] Correspondingly, the second type of heat exchange device can be controlled to be in heat dissipation mode to cool down the target energy storage system.

[0121] In one specific implementation, the heat exchange efficiency of the first type of heat exchange device is greater than that of the second type of heat exchange device, and the energy consumption of the first type of heat exchange device is greater than that of the second type of heat exchange device. This allows for the selection of different heat exchange devices based on heat exchange requirements, thereby improving flexibility.

[0122] For example, the second type of heat exchange device is an air-cooled heat exchanger, and the first type of heat exchange device is an air conditioning heat exchanger. Considering that the energy consumption of the air-cooled heat exchanger is lower and the heat exchange efficiency of the air conditioning heat exchanger is higher, the power consumption of the air conditioning heat exchanger can be reduced while making full use of the ambient heat dissipation. Furthermore, when air cooling cannot reduce the cooling medium to the set temperature, heat dissipation can be achieved through the air conditioning heat exchanger, thereby further improving the heat dissipation efficiency.

[0123] In some examples, the ambient temperature parameter corresponds to the fifth temperature range, and the cooling medium temperature parameter corresponds to the sixth temperature range, thus determining the thermal management mode as the second cooling mode, which can cool the target energy storage system and meet the heat dissipation requirements.

[0124] For example, the fifth temperature range can be a temperature range greater than or equal to 10°C and less than or equal to 19°C, and the sixth temperature range can be a temperature range greater than 19°C; or, the fifth temperature range can be a temperature range greater than or equal to 10°C and less than or equal to 19°C, and the sixth temperature range can be a temperature range greater than or equal to 15°C and less than or equal to 19°C; or, the fifth temperature range can be a temperature range greater than or equal to 0°C and less than 10°C, and the sixth temperature range can be a temperature range greater than 19°C.

[0125] Accordingly, both the first and second type of heat exchangers can be controlled to operate in heat dissipation mode to cool the target energy storage system. The heat exchange efficiency of the first type of heat exchanger is greater than that of the second type, and its energy consumption is also greater. When the target energy storage system has a high heat level, the first and second type of heat exchangers are used to dissipate heat and meet the heat exchange requirements of the target energy storage system.

[0126] In some examples, the ambient temperature parameter corresponds to the seventh temperature range, the cooling medium temperature parameter corresponds to the eighth temperature range, and the thermal management mode is determined to be the third cooling mode to dissipate heat from the target energy storage system.

[0127] For example, the seventh temperature range and the eighth temperature range can be temperature ranges greater than 19°C; or, the seventh temperature range can be a temperature range greater than or equal to 10°C and less than or equal to 19°C, and the eighth temperature range can be a temperature range greater than 19°C.

[0128] Accordingly, the first type of heat exchange device can be controlled to be in heat dissipation mode to cool down the target energy storage system.

[0129] In some examples, the ambient temperature parameter corresponds to the ninth temperature range, and the cooling medium temperature parameter corresponds to the tenth temperature range. The thermal management mode is determined to be the uniform temperature mode, so that the target energy storage system can be cooled down by convection heat transfer, thereby reducing energy consumption.

[0130] For example, the ninth temperature range can be a temperature range greater than or equal to 10°C and less than 19°C, and the tenth temperature range can be a temperature range greater than or equal to 15°C and less than 19°C; or, the ninth temperature range can be a temperature range greater than or equal to 0°C and less than 10°C, and the tenth temperature range can be a temperature range greater than 19°C; or, the ninth temperature range can be a temperature range greater than or equal to 0°C and less than 10°C, and the tenth temperature range can be a temperature range less than 0°C; or, the ninth temperature range can be a temperature range less than 0°C, and the tenth temperature range can be a temperature range greater than or equal to 15°C and less than or equal to 19°C.

[0131] Accordingly, the first and second types of heat exchangers can be shut down, and the cooling medium of the non-target energy storage system can be controlled to cool the target energy storage system. Alternatively, the cooling medium of the target energy storage system can be mixed to cool the target energy storage system. Based on this, convective heat transfer can be used to cool the target energy storage system and reduce energy consumption.

[0132] For example, when there is only one target energy storage system, the cooling medium of a non-target energy storage system adjacent to the target energy storage system can be used to cool the target energy storage system. The non-target energy storage system can be understood as an energy storage system that is not in operation. Alternatively, when there is more than one target energy storage system, the cooling media of the target energy storage systems can be mixed to cool the target energy storage system.

[0133] In some embodiments, the ambient temperature state is determined based on the ambient temperature of the target energy storage system, and the cooling medium temperature state is determined based on the temperature of the cooling medium in the thermal management loop of the target energy storage system. Then, the thermal management mode is determined based on the ambient temperature state and the cooling medium temperature state. By determining the thermal management mode using the ambient temperature and cooling medium temperature of the target energy storage system, it is possible to adapt to different environmental conditions and the operating temperature of the energy storage system, meet different thermal management requirements, and thus improve the thermal management effect, efficiency, and safety of the energy storage system.

[0134] In some examples, the thermal management mode can be determined based on the ambient temperature state, the cooling medium temperature state, and a pre-established mapping relationship between the state and the thermal management mode. Based on the target energy storage system's ambient temperature state, cooling medium temperature state, and the pre-established mapping relationship between the state and the thermal management mode, the thermal management mode can be quickly determined, improving thermal management efficiency.

[0135] In some examples, the corresponding ambient temperature range is determined based on the ambient temperature of the target energy storage system, and the ambient temperature state is determined based on the ambient temperature range. The fluctuation and uncertainty of the ambient temperature are taken into account to avoid frequent adjustments to the thermal management mode due to instantaneous temperature fluctuations, thereby improving the stability and robustness of the system.

[0136] For example, if the ambient temperature range corresponding to the target energy storage system is determined to be below 0°C, then the ambient temperature state is determined to be a cold state.

[0137] If the ambient temperature range corresponding to the target energy storage system is greater than or equal to 0℃ and less than 10℃, then the ambient temperature state is determined to be a low temperature state.

[0138] If the ambient temperature range of the target energy storage system is determined to be greater than or equal to 10℃ and less than or equal to 19℃, then the ambient temperature state is determined to be normal temperature state.

[0139] If the ambient temperature range corresponding to the target energy storage system is greater than 19°C, then the ambient temperature state is determined to be a high-temperature state.

[0140] In some examples, the corresponding cooling medium temperature range is determined based on the temperature of the cooling medium in the thermal management loop of the target energy storage system. The cooling medium temperature state is then determined based on the cooling medium temperature range. The fluctuation and uncertainty of the cooling medium temperature are taken into account to avoid frequent adjustments to the thermal management mode due to instantaneous temperature fluctuations, thereby improving the stability and robustness of the system.

[0141] For example, if the temperature range of the cooling medium in the thermal management loop of the target energy storage system is determined to be below 15°C, then the cooling medium temperature state is determined to be subcooled.

[0142] Based on the temperature of the cooling medium in the thermal management loop of the target energy storage system, the appropriate range of cooling medium temperature is determined to be greater than 15℃ and less than or equal to 19℃.

[0143] If the temperature of the cooling medium in the thermal management loop of the target energy storage system is greater than 19°C, then the cooling medium temperature state is determined to be overheated.

[0144] Accordingly, the thermal management mode can be determined based on the ambient temperature and the temperature of the cooling medium.

[0145] In some examples, thermal management modes may include heating mode, first cooling mode, second cooling mode, third cooling mode, and equalization mode.

[0146] Table 1

[0147]

[0148] Table 1 shows the thermal management modes determined based on ambient temperature and cooling medium temperature under single-cabinet operation. As shown in Table 1, when the ambient temperature is cold and the cooling medium temperature is subcooled, the thermal management mode is determined to be heating mode; when the ambient temperature is low and the cooling medium temperature is subcooled, the thermal management mode is determined to be heating mode; when the ambient temperature is normal and the cooling medium temperature is subcooled, the thermal management mode is determined to be first cooling mode. When the ambient temperature is cold and the cooling medium temperature is suitable, the thermal management mode is determined to be heating mode; when the ambient temperature is low and the cooling medium temperature is suitable, the thermal management mode is determined to be first cooling mode; when the ambient temperature is normal and the cooling medium temperature is suitable, the thermal management mode is determined to be temperature equalization mode. When the ambient temperature is cold and the cooling medium temperature is overheated, the thermal management mode is determined to be the first cooling mode; when the ambient temperature is low and the cooling medium temperature is overheated, the thermal management mode is determined to be the uniform temperature mode; when the ambient temperature is normal and the cooling medium temperature is overheated, the thermal management mode is determined to be the second cooling mode; and when the ambient temperature is high and the cooling medium temperature is overheated, the thermal management mode is determined to be the third cooling mode.

[0149] Table 2

[0150]

[0151] Table 2 shows the thermal management modes determined based on ambient temperature and cooling medium temperature under dual-cabinet operation. As shown in Table 2, when the ambient temperature is cold and the cooling medium temperature is subcooled, the thermal management mode is heating mode; when the ambient temperature is low and the cooling medium temperature is subcooled, the thermal management mode is uniform temperature mode; when the ambient temperature is normal and the cooling medium temperature is subcooled, the thermal management mode is first cooling mode. When the ambient temperature is cold and the cooling medium temperature is suitable, the thermal management mode is uniform temperature mode; when the ambient temperature is low and the cooling medium temperature is suitable, the thermal management mode is first cooling mode; when the ambient temperature is normal and the cooling medium temperature is suitable, the thermal management mode is second cooling mode. When the ambient temperature is cold and the cooling medium temperature is overheated, the thermal management mode is determined to be the first cooling mode; when the ambient temperature is low and the cooling medium temperature is overheated, the thermal management mode is determined to be the second cooling mode; when the ambient temperature is normal and the cooling medium temperature is overheated, the thermal management mode is determined to be the third cooling mode; when the ambient temperature is high and the cooling medium temperature is overheated, the thermal management mode is determined to be the third cooling mode.

[0152] Based on Tables 1 and 2, the heat dissipation requirements of single-cabinet operation and dual-cabinet parallel operation can be met, which has high flexibility.

[0153] The battery management method provided in this application performs thermal management on the target energy storage system based on ambient temperature parameters and cooling medium temperature parameters. This method can address the differences in heat generation power of different energy storage systems during charging and discharging, meet the heat dissipation requirements of different energy storage systems, and improve heat dissipation efficiency.

[0154] Figure 2 A schematic diagram of the control device provided in this application. Figure 2 As shown, the control device 50 provided in this embodiment includes at least one processor 501 and a memory 502. Optionally, the device 50 further includes a communication component 503. The processor 501, memory 502, and communication component 503 are connected via a bus 504.

[0155] In a specific implementation, at least one processor 501 executes computer execution instructions stored in memory 502, causing at least one processor 501 to perform the above-described method.

[0156] The specific implementation process of processor 501 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0157] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0158] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0159] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0160] This application also provides a terminal device, including the control device described above.

[0161] Figure 3 A schematic diagram of the structure of the terminal device provided in this application, such as... Figure 3 As shown, the terminal equipment includes a control device 100 and a heat exchange device 200, with the heat exchange device 100 connected to the energy storage system (e.g., energy storage system 1 and energy storage system 2) and the control device 200.

[0162] The control device 200 is used to determine the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters, and to determine the functional mode of the heat exchange device 100 based on the thermal management mode. The heat exchange device 100 performs thermal management on the target energy storage system according to the functional mode.

[0163] In this embodiment, by sharing a heat exchange device 100 among multiple energy storage systems, compared to setting up an independent heat exchange device for each energy storage system, the power consumption of the conversion device can be significantly reduced, and the energy efficiency of the energy storage system can be improved. Furthermore, the heat exchange device provides a thermal management loop for each energy storage system, thereby enabling heat dissipation for each system. In addition, considering the potential differences in heat generation power during charging and discharging of different energy storage systems, the control device determines the functional mode of the heat exchange device based on the ambient temperature parameters and cooling medium temperature parameters of the target energy storage system. This allows the heat exchange device to perform thermal management of the target energy storage system according to the functional mode, meeting the heat exchange needs of different energy storage systems and accommodating flexible operation of different energy storage systems.

[0164] In some embodiments, the heat exchange device can be of one or more types, and there is a mapping relationship between the thermal management mode and the functional mode of the heat exchange device. The control device is used to determine the functional mode of the heat exchange device based on the thermal management mode and control the heat exchange device to operate in the corresponding functional mode. The heat exchange device is used to perform thermal management on the target energy storage system based on the corresponding functional mode. Different types of heat exchange devices can meet the heat dissipation requirements of different energy storage systems while reducing the energy consumption of terminal equipment.

[0165] For example, the thermal management mode may include a heating mode, a first cooling mode, a second cooling mode, a third cooling mode, or a temperature equalization mode. Correspondingly, the functional mode of the heat exchanger may include a heating mode, a heat dissipation mode, or a stop mode, where the heat exchanger is in a stopped state and not operating.

[0166] For example, when the thermal management mode includes a heating mode, the functional mode of the heat exchange device corresponding to the heating mode includes the first heat exchange device being in heating mode; when the thermal management mode includes a first cooling mode, the functional mode of the heat exchange device corresponding to the first cooling mode includes the second device being in heat dissipation mode; when the thermal management mode includes a second cooling mode, the functional mode of the heat exchange device corresponding to the second cooling mode includes both the second and first devices being in heat dissipation mode; when the thermal management mode includes a third cooling mode, the functional mode of the heat exchange device corresponding to the third cooling mode includes the first device being in heat dissipation mode; when the thermal management mode includes a temperature equalization mode, the functional mode of the heat exchange device corresponding to the temperature equalization mode includes the second and first devices being in stop mode.

[0167] In some examples, the thermal management system includes a second device and a first device, wherein the heat exchange efficiency of the second device is less than that of the second type of heat exchange, so that the heat dissipation requirements of different energy storage systems can be met according to the second device and / or the first device.

[0168] In some examples, the second device includes an air-cooled heat exchanger and the first device includes an air conditioning heat exchanger. Considering that the air-cooled heat exchanger has lower energy consumption and the air conditioning heat exchanger has higher heat exchange efficiency, the power consumption of the air conditioning heat exchanger can be reduced while making full use of the ambient heat dissipation.

[0169] As an implementation method, combined Figure 3 and Figure 4 As shown, the air-cooled heat exchanger 102 includes a first fan 7 and a first heat exchanger 8. The first fan 7 is connected to the control device 200, the first end of the first heat exchanger 8 is connected to the first end of each energy storage system, and the second end of the first heat exchanger 8 is connected to the second end of each energy storage system. Therefore, when it is necessary to use the air-cooled heat exchanger 102 to dissipate heat from the target energy storage system, the control device 200 can be used to control the operation of the first fan 7 and to control the first heat exchanger 8 to connect to the thermal management loop of the target energy storage system, so as to control the air-cooled heat exchanger 102 to be in heat dissipation mode.

[0170] Specifically, the first heat exchanger 8 can remove the heat of the cooling medium in the thermal management circuit of the target energy storage system, and the first fan 7 can reduce the temperature of the heat exchanger by forcing airflow, thereby achieving heat dissipation for the target energy storage system.

[0171] When it is not necessary to use the air-cooled heat exchanger 102 to dissipate heat from the target energy storage system, the control device 200 can also control the first fan 7 to stop running and control the first heat exchanger 8 to be bypassed, so as to keep the air-cooled heat exchanger 102 in a stopped state.

[0172] As an implementation method, combined Figure 3 and Figure 4 As shown, the air conditioning heat exchanger 101 includes a second fan 13, a condenser 14, a compressor 15, a second heat exchanger 16, and a throttle valve 12. The first end of the condenser 14 is connected to the first end of the compressor 15, the second end of the compressor 15 is connected to the first end of the second heat exchanger 16, the second end of the second heat exchanger 16 is connected to the first end of the throttle valve 12, and the second end of the throttle valve 12 is connected to the second end of the condenser 14. The compressor 15 is responsible for compressing the low-pressure gaseous refrigerant into a high-pressure, high-temperature gas. The condenser 14 is used to cool and condense the high-temperature, high-pressure gas from the compressor 15 into a liquid, releasing heat to the surrounding environment during the cooling and condensation process. The second fan 13 assists the condenser 14 in transferring heat to the surrounding environment. The second heat exchanger 16 absorbs heat from the cooling medium in the thermal management circuit of the target energy storage system and can remove heat from the heat exchanger through the liquid condensed in the condenser 14. The throttle valve 12 controls the refrigerant flow rate. For example, the compressor 15 may be a variable frequency refrigeration compressor.

[0173] Therefore, when the target energy storage system needs to be cooled by the air conditioning heat exchanger 101, the control device 200 can be used to control the operation of the second fan 13, condenser 14, and compressor 15, as well as to control the opening of the throttle valve 12, and simultaneously control the second heat exchanger 16 to connect to the thermal management circuit of the target energy storage system, so as to control the air conditioning heat exchanger 101 to be in cooling mode. When the air conditioning heat exchanger 101 is in cooling mode, it can cool the cooling medium in the thermal management circuit, thereby meeting the cooling requirements of the target energy storage system.

[0174] When it is not necessary to dissipate heat from the target energy storage system through the air conditioning heat exchanger 101, the control device 200 can also control the second fan 13, condenser 14 and compressor 15 to stop operating, and control the second heat exchanger 16 to be bypassed, so as to control the air conditioning heat exchanger 101 to be in a stop mode. At this time, the target energy storage system can be cooled by convective heat exchange between the target energy storage systems, or the target energy storage system can be cooled by the cooling medium of the non-target energy storage system that is not in operation adjacent to the target energy storage system.

[0175] In one implementation, the second heat exchanger 16 includes a heating unit. When the target energy storage system needs to be heated by the air conditioning heat exchanger 101, the control device 200 can control the second fan 13, condenser 14 and compressor 16 to stop operating, and control the heating unit to heat, so as to control the air conditioning heat exchanger 101 to be in heating mode to meet the heating requirements of the target energy storage system.

[0176] For example, the heating unit may include a PTC (Positive Temperature Coefficient) heating element.

[0177] As an implementation method, combined Figure 3 and Figure 4 As shown, the heat exchange device 100 includes a first three-way switch 6. The first end of the first three-way switch 6 is connected to the first end of each energy storage system, the second end of the first three-way switch 6 is connected to the first end of the first heat exchanger 8, the third end of the first three-way switch 6 is connected to the second end of the first heat exchanger 8, and the fourth end of the first three-way switch 6 is connected to a control device 200. The control device 200 can be used to control the operating mode of the first three-way switch 6 to control whether the first heat exchanger 8 is bypassed. For example, when the control device 200 controls the first three-way switch 6 to be in switching mode, the first and second ends of the first three-way switch 6 are connected, and the first heat exchanger 8 is connected to the thermal management loop of the target energy storage system. When the control device 200 controls the first three-way switch 6 to be in bypass mode, the first and third ends of the first three-way switch 6 are connected to control the first heat exchanger 8 to be bypassed.

[0178] In one implementation, the heat exchange device 100 includes a first temperature sensor 5, which is disposed between the first three-way switch 6 and the first terminal of each energy storage system in the thermal management loop of the target energy storage system. The first temperature sensor 5 is also connected to a control device 200. The first temperature sensor 5 is used to detect the temperature of the cooling medium in the thermal management loop of the target energy storage system and send it to the control device 200. The control device 200 is used to control the operating mode of the first three-way switch 6 based on the ambient temperature and the cooling medium temperature sent by the first temperature sensor 5. For example, the first temperature sensor 5 can be used to detect the temperature of the cooling medium output from the first terminal of the target energy storage system.

[0179] In one implementation, the heat exchange device 100 includes a second three-way switch 10. The first end of the second three-way switch 10 is connected to the second end of the first heat exchanger 8, the second end of the second three-way switch 10 is connected to the third end of the second heat exchanger 16, the third end of the second three-way switch 10 is connected to the fourth end of the second heat exchanger 16, and the fourth end of the second three-way switch 10 is connected to a control device 200. The control device 200 can be used to control the operating mode of the second three-way switch 10 to control whether the second heat exchanger 16 is bypassed. For example, when the control device 200 controls the second three-way switch 10 to be in switching mode, the first and third ends of the second three-way switch 10 are connected, and the second heat exchanger 16 is connected to the thermal management loop of the target energy storage system. When the control device 200 controls the second three-way switch 10 to be in bypass mode, the first and second ends of the second three-way switch 10 are connected to control the second heat exchanger 16 to be bypassed.

[0180] In one implementation, the heat exchange device 100 includes a second temperature sensor 9, which is disposed between the first heat exchanger 8 and the second three-way switch 10 in the thermal management loop of the target energy storage system. The second temperature sensor 9 is connected to a control device 200. The second temperature sensor 9 is used to detect the temperature of the cooling medium in the thermal management loop of the target energy storage system and sends it to the control device 200. The control device 200 is used to control the operating mode of the second three-way switch 10 based on the ambient temperature and the cooling medium temperature sent by the second temperature sensor 9. For example, the second temperature sensor 9 can be used to detect the temperature of the cooling medium after heat exchange through the second device.

[0181] In one implementation, the heat exchange device 100 further includes a third temperature sensor 11 and a third three-way switch 18. The third temperature sensor 11 is disposed between the first device and the second end of each energy storage unit, and is connected to the control device 200. The third temperature sensor 11 is used to detect the temperature of the cooling medium in the thermal management loop of the target energy storage system and send it to the control device 200. The control device 200 is used to control the operating mode of the third three-way switch 18 according to the cooling medium temperature sent by the third temperature sensor 11, so as to control the cooling medium to flow back to the corresponding energy storage system.

[0182] For example, the operating modes of the third three-way switch 18 may include a diversion mode and a switching mode. The diversion mode is used to control the flow of cooling medium back to each energy storage unit, and the switching mode is used to control the flow of cooling medium back to the corresponding target energy storage system.

[0183] In one implementation, the heat exchange device 100 further includes at least one shut-off valve. The first end of each shut-off valve is connected to the first end of the corresponding energy storage system, the second end of each shut-off valve is connected to the heat exchange device, and the third end of each shut-off valve is connected to the control device 200. The control device 200 controls the opening and closing states of the shut-off valves to control whether the cooling medium of the energy storage system flows to the heat exchange device 100. For example, when the control device 200 controls the shut-off valve to be in the open state, the cooling medium of the energy storage system can flow to the heat exchange device; when the control device 200 controls the shut-off valve to be in the closed state, the cooling medium of the energy storage system cannot flow to the heat exchange device 100.

[0184] In one implementation, the heat exchange device 100 includes at least one power pump, with a first end of each power pump connected to a second end of a corresponding energy storage system, and the second end of each power pump connected to a first device. A control device is used to control the operating mode of the power pump to drive the circulation of the cooling medium in the thermal management loop.

[0185] For example, a power pump may include a water pump.

[0186] In one implementation, there are multiple target energy storage systems. The control device 200 is used to control the power pump corresponding to each target energy storage system to operate in the first mode to mix the cooling medium in the thermal management loop of the target energy storage system. The control device 200 can also be used to control the power pump corresponding to each target energy storage system to operate in the second mode to obtain the cooling medium mixing temperature of the target energy storage system and perform thermal management on the target energy storage system according to the ambient temperature and the cooling medium mixing temperature.

[0187] To facilitate understanding of the solution in this application, the working process under the thermal management mode is described in detail below with reference to the accompanying drawings. Considering that the thermal management modes corresponding to single energy storage systems and multi-energy storage systems are different, the working process of the thermal management mode of a single energy storage system and the working process of the thermal management mode of a dual energy storage system are described separately.

[0188] First, the working process of the thermal management mode of a single energy storage system will be explained:

[0189] Heating mode:

[0190] When both the ambient temperature and the cooling medium temperature are low, the thermal management mode is set to heating mode. In this mode, the heat generated by the energy storage system is insufficient to maintain the cell temperature, requiring the heating unit of the air conditioning heat exchanger to provide heat to the energy storage system to ensure cell safety and efficient operation of the energy storage system. At this time, the heat exchange device can operate in single-loop mode, with the cooling cycles of the air-cooled heat exchanger and the air conditioning heat exchanger shut down. For example... Figure 5 As shown, the cooling medium in the energy storage system 1 flows out from the shut-off valve 3, passes through the first temperature sensor 5, and then flows through the bypass branch of the air-cooled heat exchanger to the second temperature sensor 9. It then flows through the second heat exchanger 16 in the air conditioning heat exchanger. Since the second heat exchanger 16 has a built-in heating unit, the cooling medium can be heated by the heating unit to increase the temperature of the cooling medium. Then, after passing through the third three-way switch 18, it is pressurized by the water pump 17 and enters the energy storage system 1 to heat the battery cells.

[0191] First cooling mode:

[0192] When the ambient temperature is low and the energy storage system generates a large amount of heat, the thermal management mode is set to the first cooling mode. In this case, the cooling medium can be cooled by an air-cooled heat exchanger, reducing the energy consumption of the heat exchange device. Figure 6 As shown, the cooling medium in the energy storage system 1 flows out from the shut-off valve 3, passes through the first temperature sensor 5, and then enters the first heat exchanger 8 in the air-cooled heat exchanger through the first three-way switch 6. The outlet temperature of the first heat exchanger 8, that is, the temperature of the cooling medium flowing out from the outlet of the first heat exchanger 8, can be adjusted by controlling the speed of the first fan 7 in the air-cooled heat exchanger. Then, the cooling medium passes through the third three-way switch 18, is pressurized by the water pump 17, and enters the energy storage system 1 to cool the battery cells.

[0193] Second cooling mode:

[0194] When the ambient temperature is low and the energy storage system generates a large amount of heat, and air cooling cannot lower the cooling medium to the set temperature, the cooling medium temperature can be reduced by operating both an air-cooled heat exchanger and an air conditioning heat exchanger. When the cooling medium temperature is high, air cooling is fully utilized to reduce the power consumption of the air conditioning heat exchanger, and the air conditioning heat exchanger is used to further improve heat dissipation efficiency. Figure 7 As shown, the cooling medium in the energy storage system 1 flows out from the shut-off valve 3, passes through the first temperature sensor 5, and then enters the first heat exchanger 8 in the air-cooled heat exchanger through the first three-way switch 6. It then enters the air conditioning heat exchanger for cooling through the second three-way switch 10. After that, the cooling medium passes through the third three-way switch 18, is pressurized by the water pump 17, and enters the energy storage system 1 to cool the battery cells.

[0195] Third cooling mode:

[0196] When the ambient temperature is high and the energy storage system has a high power demand, only an air conditioning heat exchanger can be used to dissipate heat from the energy storage system. For example... Figure 8 As shown, the cooling medium in the energy storage system 1 flows out from the shut-off valve 3, passes through the first temperature sensor 5, and then flows through the bypass branch of the air-cooled heat exchanger to the second temperature sensor 9. It then flows through the second heat exchanger 16 in the air conditioning heat exchanger for cooling. Subsequently, the cooling medium passes through the third three-way switch 18, is pressurized by the water pump 17, and enters the energy storage system 1 to cool the battery cells.

[0197] Equal Temperature Mode:

[0198] In the case of a single energy storage system operating, the cooling medium of adjacent energy storage systems and the heat storage capacity of the energy storage system can be used to cool the operating energy storage system. For example... Figure 9 As shown, the cooling media in energy storage system 1 and energy storage system 2 flow into the first three-way switch 6 from shut-off valves 3 and 4, respectively. At this point, the temperature detected by the first temperature sensor 5 determines whether additional air cooling is needed, thus determining whether the cooling media passes through the first heat exchanger 8 or the bypass branch of the air-cooled heat exchanger. It then flows through the second three-way switch 10 and the third three-way switch 18. Part of the cooling media is pressurized by water pump 17 and enters energy storage system 1 to dissipate heat from the battery cells, while the other part is pressurized by water pump 19 and passes through energy storage system 2 to transfer heat to the battery cells. Energy storage system 1 is the operating energy storage system, and energy storage system 2 is the stopped energy storage system.

[0199] The working process of the thermal management mode of the dual energy storage system will be explained next:

[0200] Heating mode:

[0201] When both the ambient temperature and the cooling medium temperature are low, the thermal management mode is set to heating mode. In this mode, the heat generated by the energy storage system is insufficient to maintain the cell temperature, requiring the heating unit of the air conditioning heat exchanger to provide heat to the energy storage system to ensure cell safety and efficient operation of the energy storage system. When two energy storage systems operate simultaneously, such as... Figure 10As shown, the cooling media in energy storage system 1 and energy storage system 2 first flow out from water pump 17 and water pump 19 respectively, and then flow into the liquid cooling pipeline. The heat from the battery cells is carried away by convection heat exchange, and then flows back to energy storage system 1 and energy storage system 2 through shut-off valves 3 and 4 respectively. Then, the operating modes of water pumps 17 and 19 are changed, causing the cooling media in energy storage system 1 and energy storage system 2 to flow out from shut-off valves 3 and 4 respectively again. After mixing, they pass through the first temperature sensor 5, which reads the mixing temperature of the cooling media in energy storage system 1 and energy storage system 2. Based on the mixing temperature and the ambient temperature, the system enters the heating mode. Then, the first three-way switch 6 allows the cooling media to enter the air conditioning heat exchanger through the bypass branch of the air-cooled heat exchanger. At this time, the cooling media temperature detected by the second temperature sensor 9 is the same as the cooling media temperature detected by the first temperature sensor 5. In the cooling circuit of the air conditioner heat exchanger, the refrigeration cycle is not turned on (the refrigeration compressor is not working), the heating unit in the second heat exchanger 16 is turned on, and the heating power of the heating unit can reach the required target temperature by increasing the current. When the third temperature sensor 11 detects that the cooling medium temperature has reached the target temperature, it passes through the third three-way switch 18, is pressurized by the water pump 17 and the water pump 19 respectively, and enters the energy storage system 1 and the energy storage system 2 to heat the battery cell.

[0202] First cooling mode:

[0203] When the ambient temperature is low and the energy storage system generates a large amount of heat, the thermal management mode is set to the first cooling mode. In this mode, the cooling medium can be cooled using an air-cooled heat exchanger, reducing the energy consumption of the heat exchange device. When two energy storage systems are running simultaneously, such as... Figure 11As shown, the cooling media in energy storage system 1 and energy storage system 2 first flow out from water pump 17 and water pump 19 respectively, and then flow into the liquid cooling pipeline. The heat from the battery cells is carried away by convection heat exchange. The media then flow back to energy storage system 1 and energy storage system 2 through shut-off valves 3 and 4 respectively. Then, the operating modes of water pumps 17 and 19 are changed, causing the cooling media in energy storage system 1 and energy storage system 2 to flow out from shut-off valves 3 and 4 respectively. After mixing, they pass through the first temperature sensor 5, which reads the mixing temperature of the cooling media in energy storage system 1 and energy storage system 2. Based on the mixing temperature and the ambient temperature, the system enters the first cooling mode. Then, the first three-way switch 6 allows the cooling media to pass through the first heat exchanger 8 of the air-cooled heat exchanger, and the first fan 7 is turned on. The heat in the cooling media is carried away by the convection heat exchange of the first fan 7, lowering the temperature of the cooling media. At this time, the cooling media temperature detected by the second temperature sensor 9 is lower than the cooling media temperature detected by the first temperature sensor 6. The second heat exchanger 16 of the air conditioning heat exchanger is bypassed by the second three-way switch 10, which closes the cooling circuit of the air conditioning heat exchanger. When the third temperature sensor 11 detects that the cooling medium temperature has reached the target temperature, it passes through the third three-way switch 18, is pressurized by water pumps 17 and 19 respectively, and enters the energy storage system 1 and energy storage system 2 to cool the battery cells. It should be noted that during this process, since the air conditioning heat exchanger is closed, the cooling medium temperature detected by the third temperature sensor 11 is the same as the cooling medium temperature detected by the second temperature sensor 9.

[0204] Second cooling mode:

[0205] When the ambient temperature is low and the energy storage system generates a large amount of heat, and air cooling cannot lower the cooling medium to the set temperature, the cooling medium temperature can be reduced by operating both an air-cooled heat exchanger and an air conditioning heat exchanger. When the cooling medium temperature is high, air cooling is fully utilized to reduce the power consumption of the air conditioning heat exchanger, and the air conditioning heat exchanger is also used to further improve heat dissipation efficiency. When both energy storage systems are running simultaneously, such as... Figure 12As shown, the cooling media in energy storage system 1 and energy storage system 2 first flow out from water pump 17 and water pump 19 respectively, and then flow into the liquid cooling pipeline. The heat from the battery cells is removed through convection heat transfer. The media then flows back to energy storage system 1 and energy storage system 2 through shut-off valves 3 and 4 respectively. Then, the operating modes of water pumps 17 and 19 are changed, causing the cooling media in energy storage system 1 and energy storage system 2 to flow out from shut-off valves 3 and 4 respectively again. After mixing, they pass through the first temperature sensor 5, which reads the mixing temperature of the cooling media in energy storage system 1 and energy storage system 2. Based on the mixing temperature and the ambient temperature, the system enters the second cooling mode. Then, the first three-way switch 6 allows the cooling media to pass through the first heat exchanger 8 of the air-cooled heat exchanger, and the first fan 7 is turned on. The heat in the cooling media is removed through convection heat transfer by the first fan 7, reducing the temperature of the cooling media. At this point, the temperature of the cooling medium detected by the second temperature sensor 9 is lower than the temperature of the cooling medium detected by the first temperature sensor 6. However, the temperature of the cooling medium has not yet reached the target temperature. Therefore, the second three-way switch 10 controls the cooling medium to flow to the second heat exchanger 16 of the air conditioner heat exchanger, which means controlling the opening of the cooling circuit of the air conditioner heat exchanger. After passing through the cooling circuit of the air conditioner heat exchanger, the temperature of the cooling medium is further reduced. When the third temperature sensor 11 detects that the temperature of the cooling medium has reached the target temperature, it passes through the third three-way switch 18 and is pressurized by the water pumps 17 and 19 respectively before entering the energy storage system 1 and the energy storage system 2 to cool the battery cells.

[0206] Third cooling mode:

[0207] When the ambient temperature is high and the energy storage system has a high power demand, only an air conditioning heat exchanger can be used to cool the energy storage system. When two energy storage systems are running simultaneously, such as... Figure 13As shown, the cooling medium in energy storage system 1 and the cooling medium in energy storage system 2 first flow out from water pump 17 and water pump 19 respectively, and then flow into the liquid cooling pipeline respectively. The heat of the battery cell is removed by convection heat exchange, and then flows back to energy storage system 1 and energy storage system 2 through shut-off valve 3 and shut-off valve 4 in sequence. Then, the operating modes of water pumps 17 and 19 are changed, so that the cooling medium in energy storage system 1 and energy storage system 2 flow out from shut-off valves 3 and 4 respectively. After mixing, they pass through the first temperature sensor 5. The first temperature sensor 5 can read the mixing temperature of the cooling medium in energy storage system 1 and energy storage system 2. After determining the entry into the third cooling mode based on the mixing temperature of the cooling medium and the ambient temperature, the first heat exchanger 8 of the air-cooled heat exchanger is bypassed through the first three-way switch 6. At this time, the cooling medium temperature detected by the second temperature sensor 9 is equal to the cooling medium temperature detected by the first temperature sensor 5. The cooling medium is controlled to flow to the second heat exchanger 16 of the air conditioning heat exchanger through the second three-way switch 10, that is, the cooling circuit of the air conditioning heat exchanger is opened. After passing through the cooling circuit of the air conditioning heat exchanger, the temperature of the cooling medium is further reduced. When the third temperature sensor 11 detects that the cooling medium temperature has reached the target temperature, it passes through the third three-way switch 8 and is pressurized by water pumps 17 and 19 respectively before entering energy storage system 1 and energy storage system 2 to cool the battery cells.

[0208] Equal Temperature Mode:

[0209] When two energy storage systems work simultaneously, such as Figure 14 As shown, the cooling medium in energy storage system 1 and the cooling medium in energy storage system 2 first flow out from water pump 17 and water pump 19 respectively, and then flow into the liquid cooling pipeline respectively. The heat of the battery cell is removed by convection heat exchange, and then flows back to energy storage system 1 and energy storage system 2 through shut-off valve 3 and shut-off valve 4 in sequence. Then, the operating modes of water pumps 17 and 19 are changed, so that the cooling medium in energy storage system 1 and the cooling medium in energy storage system 2 flow out from shut-off valves 3 and 4 respectively. After mixing, they pass through the first temperature sensor 5. The first temperature sensor 5 can read the mixing temperature of the cooling medium in energy storage system 1 and energy storage system 2. After entering the uniform temperature mode based on the mixing temperature of the cooling medium and the ambient temperature, it can determine whether additional air cooling is needed based on the temperature detected by the first temperature sensor 5. Thus, it determines whether the cooling medium passes through the first heat exchanger 8 of the air-cooled heat exchanger or the bypass path of the air-cooled heat exchanger. Then it flows through the second three-way switch 10 and the third three-way switch 18. Part of the cooling medium is pressurized by water pump 17 and enters energy storage system 1 to dissipate heat from the battery cells. The other part of the cooling medium is pressurized by water pump 19 and enters energy storage system 2 to dissipate heat from the battery cells.

[0210] Based on this, the heat dissipation requirements of single energy storage system operation and dual energy storage system parallel operation can be effectively met, and it has high flexibility.

[0211] The terminal equipment provided in this application reduces the power consumption of the heat exchange device and improves the energy efficiency of the energy storage system by allowing multiple energy storage systems to share a heat exchange device. Furthermore, the heat exchange device provides a thermal management loop for each energy storage system, enabling heat dissipation for each system. In addition, the control device performs thermal management on the target energy storage system based on the ambient temperature parameters and cooling medium temperature parameters, meeting the heat exchange needs of different energy storage systems and accommodating flexible operation of various systems.

[0212] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0213] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0214] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0215] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0216] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0217] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0218] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0219] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0220] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0221] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A battery management method, characterized in that, The method includes: The ambient temperature parameters and cooling medium temperature parameters are obtained. The ambient temperature parameters are obtained based on the ambient temperature of the target energy storage system, and the cooling medium temperature parameters are obtained based on the cooling medium temperature of the thermal management loop of the target energy storage system. Thermal management of the target energy storage system is performed based on the ambient temperature parameters and the cooling medium temperature parameters.

2. The method according to claim 1, characterized in that, The thermal management of the target energy storage system based on the ambient temperature parameters and the cooling medium temperature parameters includes: The thermal management mode is determined based on the ambient temperature parameters and the cooling medium temperature parameters. Thermal management is performed on the target energy storage system according to the thermal management mode.

3. The method according to claim 2, characterized in that, The step of determining the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters includes: The ambient temperature parameter corresponds to a first temperature range, and the cooling medium temperature parameter corresponds to a second temperature range, thus determining the thermal management mode as a heating mode.

4. The method according to claim 3, characterized in that, The first temperature range is a temperature range below 0°C, and the second temperature range is a temperature range below 15°C. Alternatively, the first temperature range is a temperature range greater than or equal to 0°C and less than 10°C, and the second temperature range is a temperature range less than 15°C; Alternatively, the first temperature range is a temperature range less than 0°C, and the second temperature range is a temperature range greater than or equal to 15°C and less than or equal to 19°C.

5. The method according to claim 3 or 4, characterized in that, The thermal management of the target energy storage system according to the thermal management mode includes: The first device is controlled to be in heating mode to heat the target energy storage system.

6. The method according to claim 2, characterized in that, The step of determining the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters includes: The ambient temperature parameter corresponds to the third temperature range, and the cooling medium temperature parameter corresponds to the fourth temperature range, thus determining the thermal management mode as the first cooling mode.

7. The method according to claim 6, characterized in that, The third temperature range is a temperature range greater than or equal to 10°C and less than 19°C, and the fourth temperature range is a temperature range less than 15°C. Alternatively, the third temperature range is a temperature range greater than or equal to 0°C and less than 10°C, and the fourth temperature range is a temperature range greater than or equal to 15°C and less than 19°C. Alternatively, the third temperature range is a temperature range less than 0°C, and the fourth temperature range is a temperature range greater than or equal to 15°C and less than or equal to 19°C.

8. The method according to claim 6 or 7, characterized in that, The thermal management of the target energy storage system according to the thermal management mode includes: The second device is controlled to be in heat dissipation mode to cool down the target energy storage system.

9. The method according to claim 2, characterized in that, The step of determining the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters includes: The ambient temperature parameter corresponds to the fifth temperature range, and the cooling medium temperature parameter corresponds to the sixth temperature range, thus determining the thermal management mode as the second cooling mode.

10. The method according to claim 9, characterized in that, The fifth temperature range is a temperature range greater than or equal to 10°C and less than or equal to 19°C, and the sixth temperature range is a temperature range greater than 19°C. Alternatively, the fifth temperature range is a temperature range greater than or equal to 10°C and less than or equal to 19°C, and the sixth temperature range is a temperature range greater than or equal to 15°C and less than or equal to 19°C. Alternatively, the fifth temperature range is a temperature range greater than or equal to 0°C and less than 10°C, and the sixth temperature range is a temperature range greater than 19°C.

11. The method according to claim 9 or 10, characterized in that, Thermal management of the target energy storage system according to the thermal management mode includes: The first and second devices are controlled to be in heat dissipation mode to cool down the target energy storage system. The heat exchange efficiency of the first device is greater than that of the second device.

12. The method according to claim 2, characterized in that, The step of determining the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters includes: The ambient temperature parameter corresponds to the seventh temperature range, and the cooling medium temperature parameter corresponds to the eighth temperature range, thus determining the thermal management mode as the third cooling mode.

13. The method according to claim 12, characterized in that, The seventh and eighth temperature ranges are temperature ranges greater than 19°C. Alternatively, the seventh temperature range is a temperature range greater than or equal to 10°C and less than or equal to 19°C, and the eighth temperature range is a temperature range greater than 19°C.

14. The method according to claim 12 or 13, characterized in that, The thermal management of the target energy storage system according to the thermal management mode includes: The first device is controlled to be in heat dissipation mode to cool down the target energy storage system.

15. The method according to claim 2, characterized in that, The step of determining the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters includes: The ambient temperature parameter corresponds to the ninth temperature range, and the cooling medium temperature parameter corresponds to the tenth temperature range, thus determining the thermal management mode as the uniform temperature mode.

16. The method according to claim 15, characterized in that, The ninth temperature range is a temperature range greater than or equal to 10°C and less than 19°C, and the tenth temperature range is a temperature range greater than or equal to 15°C and less than 19°C. Alternatively, the ninth temperature range is a temperature range greater than or equal to 0°C and less than 10°C, and the tenth temperature range is a temperature range greater than 19°C; Alternatively, the ninth temperature range is a temperature range greater than or equal to 0°C and less than 10°C, and the tenth temperature range is a temperature range less than 0°C; or the ninth temperature range is a temperature range less than 0°C, and the tenth temperature range is a temperature range greater than or equal to 15°C and less than or equal to 19°C.

17. The method according to claim 15 or 16, characterized in that, The thermal management of the target energy storage system according to the thermal management mode includes: Control the first and second devices to stop operating; The cooling medium of the non-target energy storage system is controlled to cool the target energy storage system, or the cooling medium of the target energy storage system is controlled to mix in order to cool the target energy storage system.

18. The method according to claim 1, characterized in that, The target energy storage system includes at least one of sodium batteries, lithium batteries, and manganese-based lithium batteries.

19. A control device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-18.

20. A terminal device, characterized in that, Includes the control device as described in claim 19.

21. The terminal device according to claim 20, characterized in that, It also includes: a heat exchange device, which is connected to the energy storage system and the control device; The control device is used to determine the thermal management mode based on the ambient temperature parameters and the cooling medium temperature parameters, and to determine the functional mode of the heat exchange device based on the thermal management mode. The heat exchange device is used to perform thermal management on the target energy storage system according to the functional mode.

22. The terminal device according to claim 21, characterized in that, The heat exchange device includes a first device and a second device, wherein the heat exchange efficiency of the first device is greater than that of the second device.

23. The terminal device according to claim 22, characterized in that, The first device includes an air conditioning heat exchanger, and the second device includes an air-cooled heat exchanger.

24. The terminal device according to claim 23, characterized in that, The air-cooled heat exchanger includes a first fan and a first heat exchanger. The first fan is connected to the control device, the first end of the first heat exchanger is connected to the first end of each energy storage system, and the second end of the first heat exchanger is connected to the second end of each energy storage system. The control device is used to control the operation of the first fan and to control the first heat exchanger to connect to the thermal management circuit of the target energy storage system, so as to control the air-cooled heat exchanger to be in heat dissipation mode, or to control the first fan to stop operating and to control the first heat exchanger to be bypassed, so as to control the air-cooled heat exchanger to stop operating.

25. The terminal device according to claim 23, characterized in that, The air conditioning heat exchanger includes: a second fan, a condenser, a compressor, a second heat exchanger, and a throttle valve; The first end of the condenser is connected to the first end of the compressor, the second end of the compressor is connected to the first end of the second heat exchanger, the second end of the second heat exchanger is connected to the first end of the throttle valve, and the second end of the throttle valve is connected to the second end of the condenser. The third end of the second heat exchanger is connected to the air conditioning heat exchanger, and the fourth end of the second heat exchanger is connected to the second end of each of the energy storage systems; The control device is used to control the operation of the second fan, the condenser and the compressor, and to control the throttle valve to open, and to control the second heat exchanger to connect to the thermal management circuit of the target energy storage system so as to control the air conditioning heat exchanger to be in heat dissipation mode, or to control the second fan, the condenser and the compressor to stop operating, and to control the second heat exchanger to be bypassed so as to control the air conditioning heat exchanger to stop operating.

26. The terminal device according to claim 25, characterized in that, The second heat exchanger includes a heating unit; The control device is also used to control the second fan, the condenser and the compressor to stop operating, and to control the heating unit to heat up, so as to control the air conditioner heat exchanger to be in heating mode.

27. The terminal device according to claim 24, characterized in that, The heat exchange device includes: a first three-way switch; The first end of the first three-way switch is connected to the first end of each of the energy storage systems, the second end of the first three-way switch is connected to the first end of the first heat exchanger, the third end of the first three-way switch is connected to the second end of the first heat exchanger, and the fourth end of the first three-way switch is connected to the control device. The control device is used to control the operating mode of the first three-way switch, so as to control whether the first heat exchanger is bypassed.

28. The terminal device according to claim 27, characterized in that, The heat exchange device includes: a first temperature sensor; The first temperature sensor is disposed in the thermal management circuit of the target energy storage system between the first three-way switch and the first terminal of each energy storage system, and the first temperature sensor is connected to the control device. The first temperature sensor is used to detect the temperature of the cooling medium in the thermal management loop of the target energy storage system and send it to the control device; The control device is used to control the operating mode of the first three-way switch according to the ambient temperature parameter and the cooling medium temperature sent by the first temperature sensor.

29. The terminal device according to claim 25, characterized in that, The heat exchange device includes: a second three-way switch; The first end of the second three-way switch is connected to the second end of the second device, the second end of the second three-way switch is connected to the third end of the second heat exchanger, the third end of the second three-way switch is connected to the fourth end of the second heat exchanger, and the fourth end of the second three-way switch is connected to the control device. The control device is used to control the operating mode of the second three-way switch, so as to control whether the second heat exchanger is bypassed.

30. The terminal device according to claim 29, characterized in that, The heat exchange device includes: a second temperature sensor; The second temperature sensor is disposed between the second device and the second three-way switch in the thermal management circuit of the target energy storage system, and the second temperature sensor is connected to the control device; The second temperature sensor is used to detect the temperature of the cooling medium in the thermal management loop of the target energy storage system and send it to the control device; The control device is used to control the operating mode of the second three-way switch based on the temperature of the cooling medium sent by the second temperature sensor.

31. The terminal device according to any one of claims 22-30, characterized in that, Also includes: The third temperature sensor and the third three-way switch; The third temperature sensor is disposed between the second device and the second end of each of the energy storage systems, and the third temperature sensor is connected to the control device; The third temperature sensor is used to detect the temperature of the cooling medium in the thermal management loop of the target energy storage system and send it to the control device. The control device is used to control the operating mode of the third three-way switch according to the cooling medium temperature sent by the third temperature sensor, so as to control whether the cooling medium flows back to the corresponding energy storage system.

32. The terminal device according to any one of claims 21-30, characterized in that, The heat exchange device includes: At least one shut-off valve, the first end of each shut-off valve is connected to the first end of the corresponding energy storage system, the second end of each shut-off valve is connected to the heat exchange device, and the third end of each shut-off valve is connected to the control device; The control device is used to control the on / off state of the shut-off valve, so as to control whether the cooling medium of the energy storage system flows to the heat exchange device.

33. The terminal device according to any one of claims 22-30, characterized in that, The heat exchange device includes: At least one power pump, the first end of each power pump is connected to the second end of the corresponding energy storage system, and the second end of each power pump is connected to the first device; The control device is used to control the power pump to be in working mode so as to drive the circulation of the cooling medium in the thermal management circuit.

34. The terminal device according to claim 33, characterized in that, The number of the target energy storage systems is multiple; The control device is used to control the power pump corresponding to each of the target energy storage systems to operate in a first mode, so as to mix the cooling medium in the thermal management circuit of each target energy storage system; The control device is also used to control the power pump corresponding to each of the target energy storage systems to operate in the second mode, obtain the cooling medium mixing temperature of multiple target energy storage systems, and perform thermal management on the target energy storage systems according to the ambient temperature parameters and the cooling medium mixing temperature.

35. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-18.

36. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method described in any one of claims 1-18.

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