Energy storage device and control method and device therefor, storage medium, and thermal management system

Abstract

An energy storage device and a control method and device therefor, a storage medium, and a thermal management system. The energy storage device comprises a cooling liquid heat exchange system and a refrigerant heat exchange system; the cooling liquid heat exchange system is provided with a pump body; the pump body is used for driving a first heat exchange medium to exchange heat with an energy storage system; the refrigerant heat exchange system is provided with a compressor and a fan; and a second heat exchange medium in the refrigerant heat exchange system can exchange heat with the first heat exchange medium. The method comprises: acquiring a real-time battery cell temperature Td and a real-time cooling liquid temperature Two; and on the basis of a comparison result of the real-time battery cell temperature Td and a preset battery cell temperature Tds, and a comparison result of the real-time cooling liquid temperature Two and a preset cooling liquid temperature Tws, adjusting the operation states of a compressor, a fan, and a pump body.

Description

Energy storage device and control method and device thereof, storage medium, and thermal management system

[0001] Cross-references to related publications

[0002] This disclosure claims priority to Chinese patent publication number "202310982006.2" filed by Guangdong Midea HVAC Equipment Co., Ltd. on August 4, 2023, entitled "Energy storage equipment and its control method and device, storage medium, thermal management system". Technical Field

[0003] The present disclosure relates to the technical field of energy storage devices, and in particular to an energy storage device and a control method and apparatus thereof, a storage medium, and a thermal management system. Background Art

[0004] In related technologies, energy storage temperature control devices that use a fixed-frequency method to generate cooling medium are subject to frequent shutdowns, resulting in large fluctuations in battery cell temperature, which in turn affects the energy storage performance and reliability of the energy storage device. Energy storage temperature control devices that use a variable-frequency method to generate cooling medium typically control the medium temperature. However, due to objective factors (such as wind field uniformity), the medium temperature may meet the control requirements, but the battery cell temperature may deviate. This may result in the battery cell cooling effect not achieving the expected effect and causing greater energy consumption.

[0005] Summary of the Invention

[0006] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, the present disclosure proposes a thermal management method for an energy storage device.

[0008] In a first aspect, a thermal management method for an energy storage device is disclosed. The energy storage device includes a coolant heat exchange system and a refrigerant heat exchange system. The coolant heat exchange system is provided with a pump body, which is used to drive a first heat exchange medium to exchange heat with the energy storage system. The refrigerant heat exchange system is provided with a compressor and a fan. A second heat exchange medium in the refrigerant heat exchange system can exchange heat with the first heat exchange medium. The thermal management method includes: obtaining a real-time temperature Td of a battery cell and a real-time temperature Two of the coolant;

[0009] According to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws, at least one of the output ratio of the compressor, the output ratio of the fan, and the output ratio of the pump body is adjusted.

[0010] In some embodiments, the method further includes: obtaining the operating status of the compressor; if the compressor is running, adjusting the output ratio of the compressor, the output ratio of the pump body and the output ratio of the fan according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws; if the compressor is not running, adjusting the output ratio of the pump body and the output ratio of the fan according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws.

[0011] In some embodiments, adjusting the output ratio of the compressor, the output ratio of the pump body and the output ratio of the fan according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws includes: the obtained real-time temperature Td of the battery cell and the real-time temperature Two of the coolant are both valid; if Td≥Tds+X1, Two≥Tws+X2, then increasing the output ratio of the compressor; if Td≥Tds+X1, Two≤Tws-X2, then increasing the output ratio of the compressor and the output ratio of the pump body; if Td≤Tds-X1, and Two≥Tws+X2, then reducing the output ratio of the compressor and the output ratio of the pump body; if Td≤Tds-X1, and Two≤Tws-X2, then reducing the output ratio of the compressor; wherein X1 and X2 are deviation values.

[0012] In some embodiments, adjusting the output ratio of the compressor, the output ratio of the pump body, and the output ratio of the fan according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws includes: the obtained real-time temperature Td of the battery cell is valid and the real-time temperature Two of the coolant is invalid; if Td≥Tds+X1, then increasing the output ratio of the compressor; if Td≤Tds-X1, then reducing the output ratio of the compressor; wherein X1 is the deviation value.

[0013] In some embodiments, adjusting the output ratio of the compressor, the output ratio of the pump body, and the output ratio of the fan according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws includes: the obtained real-time temperature Two of the coolant is valid and the real-time temperature Td of the battery cell is invalid; if Two≥Tws+X2, then increasing the output ratio of the compressor; if Two≤Tws-X2, then reducing the output ratio of the compressor; wherein X2 is the deviation value.

[0014] In some embodiments, adjusting the output ratio of the pump body and the output ratio of the fan according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws includes: the obtained real-time temperature Td of the battery cell and the real-time temperature Two of the coolant are both valid; if Td≥Tds+X1, Two≥Tws+X2, then increasing the output ratio of the fan; if Td≥Tds+X1, Two≤Tws-X2, then increasing the output ratio of the fan and the output ratio of the pump body; if Td≤Tds-X1, and Two≥Tws+X2, then reducing the output ratio of the fan and the output ratio of the pump body; if Td≤Tds-X1, and Two≤Tws-X2, then reducing the output ratio of the fan; wherein X1 and X2 are deviation values.

[0015] In some embodiments, adjusting the output ratio of the pump body and the output ratio of the fan according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws includes: the obtained real-time temperature Td of the battery cell is valid and the real-time temperature Two of the coolant is invalid; if Td≥Tds+X1, then increasing the output ratio of the fan; if Td≤Tds-X1, then reducing the output ratio of the fan; wherein X1 is the deviation value.

[0016] In some embodiments, adjusting the output ratio of the pump body and the output ratio of the fan according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws includes: the obtained real-time temperature Two of the coolant is valid and the real-time temperature Td of the battery cell is invalid; if Two≥Tws+X2, then increasing the output ratio of the fan; if Two≤Tws-X2, then reducing the output ratio of the fan; wherein X2 is the deviation value.

[0017] In some embodiments, after adjusting the output ratio of the compressor, the output ratio of the fan, and the output ratio of the pump body, the real-time temperature of the battery cell Td and the real-time temperature of the coolant Two are re-obtained, and based on the comparison results of the real-time temperature of the battery cell Td and the preset battery cell temperature Tds, and the real-time temperature of the coolant Two and the preset coolant temperature Tws, at least one of the output ratio of the compressor, the output ratio of the fan, and the output ratio of the pump body is adjusted.

[0018] In a second aspect, a thermal management system for an energy storage device is disclosed, comprising a memory and a processor, wherein the memory stores a computer program, wherein the processor implements the steps of the above method when executing the computer program.

[0019] In a third aspect, a computer-readable storage medium is disclosed, which stores a thermal management control program for an energy storage device. When the thermal management control program for the energy storage device is executed by a processor, the thermal management method for the energy storage device is implemented.

[0020] In a fourth aspect, a control device for an energy storage device is disclosed, wherein the energy storage device includes a coolant heat exchange system and a refrigerant heat exchange system, the coolant heat exchange system is provided with a pump body, the pump body is used to drive a first heat exchange medium to exchange heat with the energy storage system, the refrigerant heat exchange system is provided with a compressor and a fan, and the second heat exchange medium in the refrigerant heat exchange system can exchange heat with the first heat exchange medium, the control device includes: an acquisition module for obtaining the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant; a control module for adjusting at least one of the output ratio of the compressor, the output ratio of the fan and the output ratio of the pump body according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws.

[0021] In a fifth aspect, an energy storage device is disclosed, comprising the control device according to the above.

[0022] Additional aspects and advantages of the present disclosure will be given in part in the description that follows and, in part, will be obvious from the description that follows, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a flowchart of a thermal management method according to some embodiments of the present disclosure;

[0024] FIG2 is a second flowchart of a thermal management method according to some embodiments of the present disclosure;

[0025] FIG3 is a third flowchart of a thermal management method according to some embodiments of the present disclosure;

[0026] FIG4 is a fourth flowchart of a thermal management method according to some embodiments of the present disclosure;

[0027] FIG5 is a schematic diagram of a thermal management system according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0029] The following describes a thermal management method for an energy storage device according to an embodiment of the present disclosure with reference to the accompanying drawings. The energy storage device includes a coolant heat exchange system and a refrigerant heat exchange system. The coolant heat exchange system is provided with a pump body, which is used to drive a first heat exchange medium to exchange heat with the energy storage system. The refrigerant heat exchange system is provided with a compressor and a fan, and a second heat exchange medium in the refrigerant heat exchange system can exchange heat with the first heat exchange medium.

[0030] 5 , the energy storage device 100 further includes an energy storage system. The energy storage system includes a battery unit. The battery unit includes a plurality of battery cells to achieve energy storage through the battery cells.

[0031] The energy storage device disclosed herein is equipped with a coolant heat exchange system and a refrigerant heat exchange system. A first heat exchange medium (i.e., a coolant, such as water) in the coolant heat exchange system can flow into the energy storage system and exchange heat with the battery to achieve temperature regulation of the energy storage system. Simultaneously, the first heat exchange medium and a second heat exchange medium (i.e., a refrigerant, such as fluoride) can exchange heat, thereby regulating the temperature of the first heat exchange medium through the refrigerant heat exchange system, thereby lowering the temperature of the first heat exchange medium and meeting the cooling requirements of the energy storage system.

[0032] Referring to Figure 5, a heater is provided in the coolant heat exchange system. The heater can heat the coolant to increase the temperature of the coolant. The heated coolant enters the energy storage system and exchanges heat with the battery to increase the temperature of the battery, preventing the battery temperature from being too low, thereby meeting the working requirements of the energy storage system in a low-temperature environment.

[0033] When the energy storage system needs to be cooled by coolant, the refrigerant heat exchange system can reduce the temperature of the first heat exchange medium through air cooling or refrigerant heat exchange. The first heat exchange medium with reduced temperature enters the energy storage system and exchanges heat with the battery to reduce the temperature of the battery, prevent the battery temperature from being too high, and control the temperature of the energy storage system within a temperature threshold range suitable for charging and discharging.

[0034] Referring to Figure 5, in the thermal management system (including the above-mentioned coolant heat exchange system and refrigerant heat exchange system), the heat exchanger (as the evaporator in the refrigerant heat exchange system) can perform heat exchange by natural cooling, that is, air is supplied by a fan to form an airflow in the installation area of ​​the thermal management system (such as: inside the frame) to reduce the temperature of the first heat exchange medium; at the heat exchanger, the temperature of the first heat exchange medium can also be reduced by exchanging heat with the second heat exchange medium. The compressor in the refrigerant heat exchange system is used to compress the refrigerant, and the temperature of the second heat exchange medium delivered to the heat exchanger can be adjusted by adjusting the compression frequency of the compressor.

[0035] Referring to Figure 5 , the coolant heat exchange system 11 includes: a first temperature sensor 1131, a second temperature sensor 1132, a first pressure sensor 1141, a second pressure sensor 1142, an expansion tank 112, a heat exchanger 13, and a pump body 111. The first temperature sensor 1131 and the first pressure sensor 1141 are respectively disposed at the inlet of the coolant heat exchange system 11. The first temperature sensor 1131 is used to detect the inlet temperature of the coolant heat exchange system 11, and the first pressure sensor 1141 is used to detect the inlet pressure of the coolant in the pipeline. The second temperature sensor 1132 and the second pressure sensor 1142 are respectively disposed at the outlet of the coolant heat exchange system 11. The second temperature sensor 1132 is used to detect the outlet temperature of the coolant heat exchange system 11, and the second pressure sensor 1142 is used to detect the outlet pressure of the coolant in the pipeline. The expansion tank 112 is used to balance the pressure in the pipeline, and the pump body 111 is used to provide driving force for the coolant to flow in the pipeline. The heater 13 is used to heat the coolant to increase the temperature of the coolant flowing into the energy storage system 2 .

[0036] 5 , the refrigerant heat exchange system 12 includes a third temperature sensor 1221, a fourth temperature sensor 1222, a third pressure sensor 1231, a fourth pressure sensor 1232, a compressor 121, a condenser 124, a free cooling heat exchanger 125, an electronic expansion valve 126, and a fan 127. Third temperature sensor 1221 and third pressure sensor 1231 are respectively located between heat exchanger 13 and compressor 121, and are used to detect the refrigerant temperature (i.e., suction temperature) and pressure (i.e., evaporation pressure) on the inlet side of compressor 121. Fourth temperature sensor 1222 and fourth pressure sensor 1232 are respectively located between compressor 121 and condenser 124, and are used to detect the refrigerant temperature (exhaust temperature) and pressure (condensing pressure) on the exhaust side of compressor 121. The refrigerant condenses in condenser 124, and fan 127 is located opposite condenser 124 to increase the air flow rate in condenser 124, thereby improving the condensation effect. The natural heat exchanger 13 is provided corresponding to the fan 127 and can exchange heat with the first heat exchange medium to reduce the temperature of the first heat exchange medium. The electronic expansion valve 126 is used to adjust the liquid supply to the evaporator (ie, the heat exchanger 13 side) according to a preset program.

[0037] The energy storage system 2 in the present disclosure includes a box 3 for arranging battery cells 21 . The battery unit includes a fifth temperature sensor 22 for detecting the temperature of the battery cells 21 .

[0038] The fan is also set corresponding to the condenser in the refrigerant heat exchange system, which can increase the air flow rate at the condenser, thereby improving the condensation effect at the condenser.

[0039] The thermal management method according to an embodiment of the present disclosure includes: obtaining a real-time battery cell temperature Td and a real-time coolant temperature Two; and adjusting at least one of the output ratios of a compressor, a fan, and a pump based on a comparison between the real-time battery cell temperature Td and a preset battery cell temperature Tds, and the real-time coolant temperature Two and a preset coolant temperature Tws. Thus, the devices in the thermal management system are controlled and adjusted based on the real-time battery cell temperature and the real-time coolant temperature parameters to prevent the battery cell temperature from deviating from a temperature threshold range suitable for operation.

[0040] Adjusting the compressor output ratio involves adjusting the compressor's compression frequency; adjusting the fan output ratio involves adjusting the fan's speed; and adjusting the pump output ratio involves adjusting the pump's compression frequency. The following describes these adjustment methods as examples.

[0041] Among them, the real-time temperature of the coolant is the real-time temperature of the first heat exchange medium, and the real-time temperature of the first heat exchange medium is detected by a temperature sensor. Referring to Figure 5, two temperature sensors are provided in the coolant heat exchange system, one of the two temperature sensors is provided at the liquid inlet end of the coolant heat exchange system (i.e., the end connected to the liquid outlet of the cold plate in the energy storage system), and is used to detect the temperature of the first heat exchange medium flowing into the coolant heat exchange system; the other of the two temperature sensors is provided at the liquid outlet end of the coolant heat exchange system (i.e., the end connected to the liquid inlet of the cold plate in the energy storage system), and is used to detect the temperature of the first heat exchange medium about to flow into the energy storage system. The real-time temperature Two of the coolant in the present disclosure can be obtained by the above-mentioned two temperature sensors.

[0042] 5 , in the energy storage system, a cell temperature sensor is provided, which is used to detect the temperature of the cell to obtain the real-time temperature Td of the cell.

[0043] Based on the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws, it can be determined whether the heat exchange process of the coolant on the battery cell meets the preset requirements. If the preset temperature requirements are not met, the compressor, fan and pump body can be adjusted to adjust the temperature regulation efficiency of the thermal management system on the battery cell, and then the operating mode of the equipment in the thermal management system can be adjusted accordingly according to the real-time temperature of the battery cell to prevent large fluctuations in the battery cell temperature and ensure the energy storage performance and reliability of the energy storage system.

[0044] In related technologies, energy storage temperature control devices that use a fixed-frequency method to generate cooling medium are subject to frequent shutdowns, resulting in large fluctuations in battery cell temperature, which in turn affects the energy storage performance and reliability of the energy storage device. Energy storage temperature control devices that use a variable-frequency method to generate cooling medium typically control the medium temperature. However, due to objective factors (such as wind field uniformity), the medium temperature may meet the control requirements, but the battery cell temperature may deviate. This may result in the battery cell cooling effect not achieving the expected effect and causing greater energy consumption.

[0045] In the thermal management method disclosed in the present invention, the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant are first obtained, and based on the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature of the coolant and the preset coolant temperature Tws, at least one of the compressor, fan and pump body is adjusted. Thus, the adjustment method of the equipment (i.e., the compressor, fan and pump body) is a judgment made in combination with the temperature of the battery cell and the coolant, not just based on the medium temperature. At the same time, more factors are considered in the adjustment process, and the adjustment methods are richer, which can reduce the influence of external factors, such as: wind field uniformity, differences in cold plate heat exchange performance, pipeline flow fluctuations, etc.

[0046] The present disclosure adjusts the compression frequency of the compressor, the compression frequency of the pump body and the speed of the fan through coordinated control, so that the thermal management system can cool the battery cells in time and achieve the best energy efficiency.

[0047] In some embodiments of the present disclosure, the control method further includes obtaining the operating status of the compressor to further determine the operating mode of the thermal management system based on the operating status of the compressor, so as to control and adjust the equipment accordingly in multiple modes.

[0048] The thermal management system uses two cooling modes for the energy storage system: compressor cooling mode and natural cooling mode. Compressor cooling mode reduces the coolant temperature by exchanging heat with the refrigerant in the refrigerant heat exchange system. Natural cooling mode reduces the coolant temperature by running the fan to generate airflow and cool the coolant. The compressor operates differently in each cooling mode.

[0049] Referring to Figure 2, if the compressor is running, the compression frequency of the compressor, the compression frequency of the pump body and the speed of the fan are adjusted according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws; if the compressor is not running, the compression frequency of the pump body and the speed of the fan are adjusted according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws.

[0050] When the compressor is running, the thermal management system uses compressor cooling mode to lower the coolant temperature. The refrigerant in the refrigerant heat exchange system exchanges heat with the coolant at the heat exchanger, so the cooling effect on the coolant can be adjusted by adjusting the compression frequency of the compressor. When the compressor is not running, the thermal management system uses natural cooling mode to lower the coolant temperature.

[0051] Adjusting the compression frequency of the compressor includes: increasing the compression frequency of the compressor, decreasing the compression frequency of the compressor, thereby adjusting the compression efficiency of the compressor on the refrigerant; adjusting the compression frequency of the pump body includes: increasing the compression frequency of the pump body, decreasing the compression frequency of the pump body, thereby adjusting the flow of coolant flowing through the coolant heat exchange system to the energy storage system; adjusting the speed of the fan includes: increasing the speed of the fan and decreasing the speed of the fan, thereby adjusting the air flow rate in the thermal management system.

[0052] Increasing the compressor's compression frequency helps lower the refrigerant temperature; decreasing the compressor's compression frequency can adaptively reduce the refrigerant heat exchange system's energy consumption. Increasing the pump's compression frequency increases the coolant flow rate in the pipeline, improving the heat exchange between the coolant and the battery cells and helping to cool the cells. Decreasing the pump's compression frequency reduces the coolant flow rate in the pipeline. Increasing the fan's speed increases the air flow rate in the thermal management system, improving the coolant's cooling effect. Decreasing the fan's speed correspondingly reduces the air flow rate in the thermal management system.

[0053] In this disclosure, the compressor, pump, and fan are selectively controlled based on the operating state of the compressor (which is also the cooling mode of the thermal management system). This allows for targeted adjustments to the devices in the thermal management system, improving the thermal management system's temperature regulation effect on the energy storage system.

[0054] As shown in FIG4 , in some embodiments of the present disclosure, adjusting the output ratio of the compressor, the output ratio of the pump, and the output ratio of the fan based on the comparison results of the real-time battery cell temperature Td and the preset battery cell temperature Tds, and the real-time coolant temperature Two and the preset coolant temperature Tws includes: if the obtained real-time battery cell temperature Td and the real-time coolant temperature Two are both valid; if Td ≥ Tds + X1 and Two ≥ Tws + X2, then increasing the output ratio of the compressor; if Td ≥ Tds + X1 and Two ≤ Tws - X2, then increasing the output ratio of the compressor and the output ratio of the pump; if Td ≤ Tds - X1 and Two ≥ Tws + X2, then decreasing the output ratio of the compressor and the output ratio of the pump; if Td ≤ Tds - X1 and Two ≤ Tws - X2, then decreasing the output ratio of the compressor. Where X1 and X2 are deviation values.

[0055] This control strategy includes adjusting the compressor output ratio, a control strategy used in the thermal management system's compressor cooling mode. First, the acquired real-time cell temperature Td and coolant temperature Two must be valid. The real-time cell temperature Td is then compared with the preset cell temperature Tds, coolant temperature Two, and coolant temperature Tws. Based on the comparison results, the compressor and pump compression frequencies are adjusted.

[0056] X1 and X2 are preset deviation values. Taking X1 as an example, Td can be compared with the highest value (i.e., Tds+X1) and the lowest value (i.e., Tds-X1) of a range, and the compressor and pump body can be further controlled based on the corresponding comparison results (such as: Td≥Tds+X1 or Td≤Tds-X1). In other words, the real-time temperature Td of the battery cell is compared with a range. If the real-time temperature Td of the battery cell is within the range (i.e., Tds-X1<Td<Tds+X1), it means that the temperature of the battery cell is controlled within a reasonable range, and there is no need to further adjust the equipment in the thermal management system, and the current operating state of the equipment can be maintained. Taking X2 as an example, Two can be compared with the highest value (i.e., Tws+X2) and the lowest value (i.e., Tws-X2) of a range, and the compressor and pump body can be further controlled based on the corresponding comparison results (such as: Two≤Tws-X2, Two≥Tws+X2). That is to say, the real-time coolant temperature Two is compared with a range. If the real-time coolant temperature Two is within the range (i.e., Tws-X2<Two<Tws+X2), it means that the coolant temperature is controlled within a reasonable range, and there is no need to further adjust the equipment in the thermal management system, and the current operating status of the equipment can be maintained.

[0057] Among them, when the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant are both valid, and the real-time temperature Td of the battery cell is within the preset range and the temperature of the coolant is controlled within the preset range, the current operating state of the device can be maintained.

[0058] "Real-time cell temperature Td" and "Real-time coolant temperature Two" are valid, meaning the thermal management system (e.g., acquisition module, control module) can effectively obtain the real-time cell temperature parameters Td and coolant temperature Two. If the temperature sensors used to detect the cell and coolant fail and are unable to feed the detected temperature information to the control module, the real-time cell temperature Td and coolant temperature Two cannot be effectively obtained, and the device cannot be controlled using the aforementioned control strategy.

[0059] In the present disclosure, by comparing the real-time cell temperature Td with the preset cell temperature Tds, and the real-time coolant temperature Two with the preset coolant temperature Tw, the heat exchange status of the cell can be determined, and the comparison results can be used to further adjust the compressor and pump. The "heat exchange status of the cell" can include: whether the cell temperature is controlled within the temperature threshold suitable for operation, whether the coolant temperature meets the heat exchange requirements of the cell, etc.

[0060] When Td≥Tds+X1, it means that the current battery cell temperature is too high and needs to be further cooled; when Td≤Tds-X1, it means that the battery cell temperature has been adjusted to a lower level, which can adaptively reduce the heat exchange efficiency of the thermal management system, meet the temperature adjustment requirements of the battery cell, and prevent the battery cell temperature from being too low.

[0061] When Two≥Tws+X2, it means that the current temperature of the coolant is too high, and it is necessary to further improve the heat exchange efficiency of the refrigerant heat exchange system and further reduce the heat exchange temperature of the refrigerant to further reduce the temperature of the coolant and improve the cooling effect of the coolant on the battery cell; when Two≤Tws-X2, it means that the temperature of the coolant is low. At this time, the temperature of the coolant can meet the demand for cooling the battery cell, can adaptively reduce the heat exchange efficiency of the thermal management system, can also meet the temperature regulation requirements of the battery cell, and can prevent the temperature of the battery cell from being too low.

[0062] Methods for reducing the heat exchange efficiency of the thermal management system include reducing the compression frequency of the compressor and the pump. Methods for improving the heat exchange efficiency of the thermal management system include increasing the compression frequency of the compressor and the pump. This allows the operating status of the thermal management system's equipment to be adjusted in real time based on the real-time cell temperature Td and the real-time coolant temperature Two, effectively regulating the cell temperature.

[0063] In some embodiments of the present disclosure, according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws, adjusting the output ratio of the compressor, the output ratio of the pump body and the output ratio of the fan include: the obtained real-time temperature Td of the battery cell is valid and the real-time temperature Two of the coolant is invalid; if Td≥Tds+X1, then increasing the output ratio of the compressor; if Td≤Tds-X1, then reducing the output ratio of the compressor; wherein X1 is the deviation value.

[0064] Invalid coolant real-time temperature Two means that the control module does not obtain the coolant real-time temperature Two, indicating that the temperature sensor used to detect the coolant temperature may be faulty.

[0065] This control strategy includes adjusting the compressor output ratio, a control strategy used by the thermal management system in compressor cooling mode. Since the acquired real-time cell temperature Td is valid and the real-time coolant temperature Two is invalid, the thermal management system's devices cannot be adjusted based on the real-time coolant temperature Two. Therefore, the thermal management system's devices (compressor) are adjusted only based on the comparison between the real-time cell temperature Td and the preset cell temperature Tds.

[0066] When Td≥Tds+X1, it means that the current battery cell temperature is too high and needs to be further cooled. The refrigerant temperature can be reduced by increasing the compressor output ratio, thereby improving the cooling effect of the refrigerant on the coolant. When Td≤Tds-X1, it means that the battery cell temperature has been adjusted to a lower level, which can adaptively reduce the heat exchange efficiency of the thermal management system, meet the temperature adjustment requirements of the battery cell, and prevent the battery cell temperature from being too low.

[0067] In some embodiments of the present disclosure, according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws, adjusting the output ratio of the compressor, the output ratio of the pump body and the output ratio of the fan include: the obtained real-time temperature Two of the coolant is valid and the real-time temperature Td of the battery cell is invalid; if Two≥Tws+X2, then increasing the output ratio of the compressor; if Two≤Tws-X2, then reducing the output ratio of the compressor; wherein X2 is the deviation value.

[0068] Invalid cell real-time temperature Td means that the control module does not obtain the cell real-time temperature Td, indicating that the temperature sensor used to detect the cell temperature may be faulty.

[0069] This control strategy applies to the thermal management system operating in compressor cooling mode. Since the real-time coolant temperature Two is valid and the real-time battery cell temperature Td is invalid, the thermal management system devices cannot be adjusted based on the real-time battery cell temperature Td. Therefore, the thermal management system devices (fans) are adjusted only based on the comparison between the real-time coolant temperature Two and the preset coolant temperature Tws.

[0070] When Two≥Tws+X2, it means that the current coolant temperature is too high and needs to be further cooled. The air flow rate in the thermal management system can be increased by increasing the fan output ratio to reduce the coolant temperature. When Two≤Tws-X2, it means that the coolant temperature has been adjusted to meet the heat exchange requirements of the battery cell. The heat exchange efficiency of the thermal management system can be adaptively reduced (such as reducing the fan speed), which can also meet the temperature regulation requirements of the battery cell and prevent the battery cell temperature from being too low.

[0071] In some embodiments of the present disclosure, adjusting the output ratio of the pump body and the output ratio of the fan according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws includes: the obtained real-time temperature Td of the battery cell and the real-time temperature Two of the coolant are both valid; if Td≥Tds+X1, Two≥Tws+X2, then increasing the output ratio of the fan; if Td≥Tds+X1, Two≤Tws-X2, then increasing the output ratio of the fan and the output ratio of the pump body; if Td≤Tds-X1, and Two≥Tws+X2, then reducing the output ratio of the fan and the output ratio of the pump body; if Td≤Tds-X1, and Two≤Tws-X2, then reducing the output ratio of the fan; wherein X1 and X2 are deviation values.

[0072] This control strategy applies to the thermal management system in natural cooling mode. When both the real-time cell temperature Td and the real-time coolant temperature Two are valid, the real-time cell temperature Td is compared with the preset cell temperature Tds, the real-time coolant temperature Two, and the preset coolant temperature Tws. Based on the comparison results, the fan and pump output ratios are adjusted.

[0073] When Td≥Tds+X1 and Two≥Tws+X2, increase the fan output ratio to enhance the cooling effect of the thermal management system on the coolant. Since the coolant temperature is high, increasing or decreasing the pump output ratio may have a negative impact (such as causing the battery cell temperature to rise further), so there is no need to adjust the pump output ratio.

[0074] When Td ≥ Tds + X1 and Two ≤ Tws - X2, the fan output ratio is increased to enhance the thermal management system's cooling effect on the coolant. The pump output ratio is also increased to increase the amount of coolant delivered to the energy storage system, further improving the heat exchange efficiency between the coolant and the battery cells. The coolant temperature is relatively low, meeting the heat exchange requirements to lower the battery cell temperature. However, the battery cell temperature is too high at this time, so increasing the pump output ratio can improve the thermal management system's heat exchange efficiency.

[0075] When Td≤Tds-X1, and Two≥Tws+X2, the output ratio of the fan and the output ratio of the pump are reduced. At this time, the temperature of the battery cell is low, and the output ratio of the fan can be adaptively reduced to prevent the temperature of the battery cell from being too low. The current temperature of the coolant is higher than the preset value, and the output ratio of the pump can be adaptively reduced to prevent the coolant temperature from being too high and causing side effects (such as: increasing the temperature of the battery cell, etc.).

[0076] When Td≤Tds-X1 and Two≤Tws-X2, the output ratio of the fan is reduced. At this time, the temperature of the battery cell is low, and the fan can be adaptively lowered to reduce the cooling effect of the thermal management system, reduce energy consumption, and achieve energy saving.

[0077] In some embodiments of the present disclosure, according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws, adjusting the output ratio of the pump body and the output ratio of the fan include: the obtained real-time temperature Td of the battery cell is valid and the real-time temperature Two of the coolant is invalid; if Td≥Tds+X1, then increasing the output ratio of the fan; if Td≤Tds-X1, then reducing the output ratio of the fan; wherein X1 is the deviation value.

[0078] Invalid coolant real-time temperature Two means that the control module does not obtain the coolant real-time temperature Two, indicating that the temperature sensor used to detect the coolant temperature may be faulty.

[0079] This control strategy applies to the thermal management system operating in natural cooling mode. The acquired real-time cell temperature Td is valid, but the real-time coolant temperature Two is invalid. Therefore, the thermal management system's devices cannot be adjusted based on the real-time coolant temperature Two. Therefore, the thermal management system's devices (fans) are adjusted only based on the comparison between the real-time cell temperature Td and the preset cell temperature Tds.

[0080] When Td≥Tds+X1, the output ratio of the fan is increased. At this time, the temperature of the battery cell is too high. The cooling effect of the coolant can be improved by increasing the output ratio of the fan, thereby improving the cooling effect of the coolant on the battery cell.

[0081] When Td≤Tds-X1, the output ratio of the fan is reduced. At this time, the temperature of the battery cell is low, and the output ratio of the fan can be adaptively reduced to reduce the energy consumption of the thermal management system.

[0082] In some embodiments of the present disclosure, according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws, adjusting the output ratio of the pump body and the output ratio of the fan include: the obtained real-time temperature Two of the coolant is valid and the real-time temperature Td of the battery cell is invalid; if Two≥Tws+X2, then increasing the output ratio of the fan; if Two≤Tws-X2, then reducing the output ratio of the fan; wherein X2 is the deviation value.

[0083] Invalid cell real-time temperature Td means that the control module does not obtain the cell real-time temperature Td, indicating that the temperature sensor used to detect the cell temperature may be faulty.

[0084] This control strategy applies to the thermal management system operating in natural cooling mode. The acquired real-time coolant temperature Two is valid, but the real-time battery cell temperature Td is invalid. Therefore, the thermal management system's devices (fans) cannot be adjusted based on the real-time battery cell temperature Td. Therefore, adjustments to the thermal management system's devices (fans) are made based solely on the comparison between the real-time coolant temperature Two and the preset coolant temperature Tws.

[0085] When Two≥Tws+X2, the fan output ratio is increased. At this time, the current temperature of the coolant is high and the coolant temperature needs to be further reduced. Therefore, the air flow rate in the thermal management system can be increased by increasing the fan output ratio to reduce the coolant temperature.

[0086] When Two≤Tws-X2, the output ratio of the fan is reduced. At this time, the temperature of the coolant is low and can meet the cooling requirements of the battery cell. Therefore, the output ratio of the fan can be adaptively reduced to reduce energy consumption in the thermal management system.

[0087] Regarding the above-mentioned multiple control steps, before comparing the real-time battery cell temperature Td with the preset battery cell temperature Tds and the real-time coolant temperature Two with the preset coolant temperature, it is necessary to obtain the valid real-time battery cell temperature Td and the real-time coolant temperature Two.

[0088] Referring to Figure 3, the priority of both the battery cell real-time temperature Td and the coolant real-time temperature Two being valid is higher than the priority of only one of the battery cell real-time temperature Td and the coolant real-time temperature Two being valid. The priority of only the battery cell real-time temperature Td being valid among the battery cell real-time temperature Td and the coolant real-time temperature Two being valid is higher than the priority of only the coolant real-time temperature Two being valid among the battery cell real-time temperature Td and the coolant real-time temperature Two. Therefore, the equipment in the thermal management system can be fully adjusted based on the detection results, and the compressor output ratio, fan output ratio, and water pump output ratio can be adjusted through coordinated control to achieve timely cooling of the battery cell temperature, so that the energy efficiency of the battery cell can be optimized.

[0089] Furthermore, when both the battery cell real-time temperature Td and the coolant real-time temperature Two are valid, the comparison priority of the battery cell real-time temperature Td and the preset battery cell temperature Tds, and the coolant real-time temperature Two and the preset coolant temperature Tws can be adjusted accordingly according to the control requirements, such as: first compare the battery cell real-time temperature Td with the preset battery cell temperature Tds, and based on the comparison result of the battery cell real-time temperature Td and the preset battery cell temperature Tds, further compare the coolant real-time temperature Two with the preset coolant temperature Tws.

[0090] In some embodiments of the present disclosure, after adjusting the output ratio of the compressor, the output ratio of the fan, and the output ratio of the pump body, the real-time temperature of the battery cell Td and the real-time temperature of the coolant Two are re-obtained, and based on the comparison results of the real-time temperature of the battery cell Td and the preset battery cell temperature Tds, and the real-time temperature of the coolant Two and the preset coolant temperature Tws, at least one of the output ratio of the compressor, the output ratio of the fan, and the output ratio of the pump body is adjusted.

[0091] Thus, the equipment in the thermal management system can be adjusted periodically, and the detection period can be 1 minute, 2 minutes, etc., which is not limited here.

[0092] The present disclosure utilizes variable frequency technology to regulate the coolant temperature. After detecting the temperatures of the battery cells and the coolant, the operating status of the equipment (compressor, fan, pump) is further controlled based on the comparison results, thereby achieving timely cooling of the battery cells and optimizing the energy efficiency of the thermal management system. Because the battery cell and coolant temperatures in the energy storage device are constantly changing, the adaptability of the equipment in the thermal management system can be adjusted through periodic detection and adjustment. Timely cooling of the battery cells is achieved through real-time detection and adjustment based on the comparison results.

[0093] In some embodiments of the present disclosure, if both the coolant real-time temperature Two and the battery cell real-time temperature Td are invalid, the current operating status of the compressor, pump, and fan is maintained. In this case, the temperature sensor cannot obtain the coolant real-time temperature Two and the battery cell real-time temperature Td. To ensure the reliability and stability of the energy storage system, the current operating status of the equipment in the thermal management system (compressor, pump, and fan) can be maintained.

[0094] In some embodiments of the present disclosure, the output ratio adjustment method of the compressor includes: increasing the compression frequency of the compressor, and decreasing the compression frequency of the compressor. Taking the current compressor frequency as q1 as an example, the adjusted compressor compression frequency is Q1. When the compressor compression frequency is increased, Q1 = q1 + 1 Hz, and when the compressor compression frequency is decreased, Q1 = q1 - 1 Hz. The above description uses an adjustment value of 1 Hz as an example and is not limiting.

[0095] In some embodiments of the present disclosure, the pump output ratio adjustment method includes increasing or decreasing the pump compression frequency. For example, when the current pump frequency is q2, the adjusted pump compression frequency is Q2. When the pump compression frequency is increased, Q2 = 101% q2, and when the pump compression frequency is decreased, Q2 = 99% q2. The above adjustment range is 1% of the current pump compression frequency, and the above adjustment range is for illustration only and is not intended to be limiting.

[0096] In some embodiments of the present disclosure, the fan output ratio adjustment method includes increasing the fan speed and decreasing the fan speed. For example, if the fan's current frequency is q3, the adjusted fan speed is Q3. When the fan speed is increased, Q3 = 101% q3, and when the fan speed is decreased, Q3 = 99% q3. The adjustment range is 1% of the current fan speed, which is for illustration only and not limiting.

[0097] As shown in Figure 3, in some embodiments of the present disclosure, when the obtained real-time temperature Td of the battery cell and the real-time temperature Two of the coolant are both valid, if Td≥Tds+X1 and Two≥Tws+X2 are satisfied, the compressor frequency is increased; if Td≥Tds+X1 is satisfied and Two≥Tws+X2 is not satisfied, the compressor frequency and the water pump frequency are increased; if Td≥Tds+X1 is not satisfied and Two≤Tws-X2 is satisfied, the compressor frequency is reduced; if Td≥Tds+X1 is not satisfied and Two≤Tws-X2 is satisfied, the compressor frequency and the water pump frequency are reduced.

[0098] As shown in FIG3 , in some embodiments of the present disclosure, when the obtained real-time temperature Td of the battery cell is valid and the real-time temperature of the coolant is invalid, if Td≥Tds+X1 is satisfied, the compressor frequency is increased; if Td≥Tds+X1 is not satisfied, the compressor frequency is reduced.

[0099] As shown in FIG3 , in some embodiments of the present disclosure, when the acquired real-time temperature Td of the battery cell is invalid and the real-time temperature of the coolant is valid, if Two≥Tws+X2 is satisfied, the compressor frequency is increased; if Two≥Tws+X2 is not satisfied, the compressor frequency is reduced.

[0100] Therefore, the operating status of the compressor and the water pump can be adjusted based on the effective status (valid or invalid) of the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant, and the comparison results of Td and Two with the preset values.

[0101] According to the control device of the energy storage device of the embodiment of the present disclosure, the energy storage device includes a coolant heat exchange system and a refrigerant heat exchange system. The coolant heat exchange system is provided with a pump body, and the pump body is used to drive the first heat exchange medium to exchange heat with the energy storage system. The refrigerant heat exchange system is provided with a compressor and a fan, and the second heat exchange medium in the refrigerant heat exchange system can exchange heat with the first heat exchange medium. The control device includes: an acquisition module, which is used to obtain the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant; a control module, which is used to adjust at least one of the output ratio of the compressor, the output ratio of the fan, and the output ratio of the pump body according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws.

[0102] The functional modules (such as the acquisition module and the control module) in the control device disclosed in the present invention can be used to execute the above-mentioned thermal management method to coordinately control and adjust the compressor output ratio, the fan output ratio and the water pump output ratio to achieve the effect of timely cooling the battery cell temperature and optimizing energy efficiency.

[0103] The energy storage device according to the embodiment of the present disclosure includes the above-mentioned control device.

[0104] The thermal management system for energy storage equipment according to the present disclosure includes a memory and a processor, wherein the memory stores a computer program, wherein the processor implements the steps of the above-mentioned thermal management method when executing the computer program.

[0105] According to the computer-readable storage medium of the present disclosure, a thermal management control program of an energy storage device is stored thereon. When the thermal management control program of the energy storage device is executed by a processor, the thermal management method of the energy storage device is implemented.

[0106] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection having one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0107] It should be understood that various parts of the present disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0108] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0109] In addition, the terms "first" and "second" used in the embodiments of the present disclosure are only used for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated in the embodiments. Therefore, the features defined in the embodiments of the present disclosure with terms such as "first" and "second" can explicitly or implicitly indicate that the embodiment includes at least one such feature. In the description of the present disclosure, the word "plurality" means at least two or two or more, such as two, three, four, etc., unless otherwise clearly and specifically defined in the embodiments.

[0110] In this disclosure, unless otherwise clearly specified or limited in the embodiments, the terms "installed," "connected," "connect," and "fixed" appearing in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection. It can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication between two elements, or the interaction between two elements. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood based on the specific implementation.

[0111] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0112] Although the embodiments of the present disclosure have been shown and described above, the above embodiments are exemplary and should not be understood as limiting the present disclosure. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present disclosure.

Claims

1. A thermal management method for an energy storage device, the energy storage device comprising a coolant heat exchange system and a refrigerant heat exchange system, the coolant heat exchange system being provided with a pump body, the pump body being used to drive a first heat exchange medium to exchange heat with the energy storage system, the refrigerant heat exchange system being provided with a compressor and a fan, and a second heat exchange medium in the refrigerant heat exchange system being capable of exchanging heat with the first heat exchange medium, the thermal management method comprising: Get the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant; According to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws, at least one of the output ratio of the compressor, the output ratio of the fan and the output ratio of the pump body is adjusted.

2. The method according to claim 1, wherein: The method further comprises: Acquiring the operating status of the compressor; If the compressor is running, the output ratio of the compressor, the output ratio of the pump body and the output ratio of the fan are adjusted according to the comparison result of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, the real-time temperature Two of the coolant and the preset coolant temperature Tws; If the compressor is not running, the output ratio of the pump body and the output ratio of the fan are adjusted according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws.

3. The method according to claim 2, wherein: According to the comparison result of the real-time temperature Td of the battery core and the preset temperature Tds of the battery core, and the real-time temperature Two of the coolant and the preset temperature Tws of the coolant, adjusting the output ratio of the compressor, the output ratio of the pump body and the output ratio of the fan comprises: The obtained real-time temperature Td of the battery cell and the real-time temperature Two of the coolant are both valid; If Td≥Tds+X1, Two≥Tws+X2, then the output ratio of the compressor is increased; If Td≥Tds+X1, Two≤Tws-X2, then the output ratio of the compressor and the output ratio of the pump body are increased; If Td≤Tds-X1, and Two≥Tws+X2, then the output ratio of the compressor and the output ratio of the pump body are reduced; If Td≤Tds-X1, and Two≤Tws-X2, then reducing the output ratio of the compressor; Among them, X1 and X2 are deviation values.

4. The method according to claim 2 or 3, wherein: According to the comparison result of the real-time temperature Td of the battery core and the preset temperature Tds of the battery core, and the real-time temperature Two of the coolant and the preset temperature Tws of the coolant, adjusting the output ratio of the compressor, the output ratio of the pump body and the output ratio of the fan comprises: The obtained real-time temperature Td of the battery cell is valid and the real-time temperature Two of the coolant is invalid; If Td≥Tds+X1, the output ratio of the compressor is increased; If Td≤Tds-X1, then reducing the output ratio of the compressor; Among them, X1 is the deviation value.

5. The method according to any one of claims 2 to 4, wherein: According to the comparison result of the real-time temperature Td of the battery core and the preset temperature Tds of the battery core, and the real-time temperature Two of the coolant and the preset temperature Tws of the coolant, adjusting the output ratio of the compressor, the output ratio of the pump body and the output ratio of the fan comprises: The obtained coolant real-time temperature Two is valid and the battery cell real-time temperature Td is invalid; If Two ≥ Tws + X2, then the output ratio of the compressor is increased; If Two≤Tws-X2, then reduce the output ratio of the compressor; Among them, X2 is the deviation value.

6. The method according to any one of claims 2 to 5, wherein: According to the comparison result of the real-time temperature Td of the battery core and the preset temperature Tds of the battery core, and the real-time temperature Two of the coolant and the preset temperature Tws of the coolant, adjusting the output ratio of the pump body and the output ratio of the fan comprises: The obtained real-time temperature Td of the battery cell and the real-time temperature Two of the coolant are both valid; If Td≥Tds+X1, Two≥Tws+X2, then the output ratio of the fan is increased; If Td≥Tds+X1, Two≤Tws-X2, then increase the output ratio of the fan and the output ratio of the pump; If Td≤Tds-X1, and Two≥Tws+X2, then reduce the output ratio of the fan and the output ratio of the pump body; If Td≤Tds-X1, and Two≤Tws-X2, then reduce the output ratio of the fan; Among them, X1 and X2 are deviation values.

7. The method according to any one of claims 2 to 6, wherein: According to the comparison result of the real-time temperature Td of the battery core and the preset temperature Tds of the battery core, and the real-time temperature Two of the coolant and the preset temperature Tws of the coolant, adjusting the output ratio of the pump body and the output ratio of the fan comprises: The obtained real-time temperature Td of the battery cell is valid and the real-time temperature Two of the coolant is invalid; If Td≥Tds+X1, the output ratio of the fan is increased; If Td≤Tds-X1, then reduce the output ratio of the fan; Among them, X1 is the deviation value.

8. The method according to any one of claims 2 to 7, wherein: According to the comparison result of the real-time temperature Td of the battery core and the preset temperature Tds of the battery core, and the real-time temperature Two of the coolant and the preset temperature Tws of the coolant, adjusting the output ratio of the pump body and the output ratio of the fan comprises: The obtained coolant real-time temperature Two is valid and the battery cell real-time temperature Td is invalid; If Two ≥ Tws + X2, then increase the output ratio of the fan; If Two≤Tws-X2, then reduce the output ratio of the fan; Among them, X2 is the deviation value.

9. The method according to any one of claims 1 to 8, wherein: After adjusting the output ratio of the compressor, the output ratio of the fan, and the output ratio of the pump body, the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant are re-acquired, and according to the comparison results of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws, at least one of the output ratio of the compressor, the output ratio of the fan, and the output ratio of the pump body is adjusted.

10. A thermal management system for an energy storage device, comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 9 are implemented.

11. A computer-readable storage medium having a thermal management control program for an energy storage device stored thereon, wherein when the thermal management control program for the energy storage device is executed by a processor, the thermal management method for the energy storage device according to any one of claims 1 to 9 is implemented.

12. A control device for an energy storage device, the energy storage device comprising a coolant heat exchange system and a refrigerant heat exchange system, the coolant heat exchange system being provided with a pump body, the pump body being used to drive a first heat exchange medium to exchange heat with the energy storage system, the refrigerant heat exchange system being provided with a compressor and a fan, and a second heat exchange medium in the refrigerant heat exchange system being capable of exchanging heat with the first heat exchange medium, the control device comprising: The acquisition module is used to obtain the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant; The control module is used to adjust at least one of the output ratio of the compressor, the output ratio of the fan and the output ratio of the pump body according to the comparison result of the real-time temperature Td of the battery cell and the preset battery cell temperature Tds, and the real-time temperature Two of the coolant and the preset coolant temperature Tws.

13. An energy storage device, comprising the control device according to claim 12.

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