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

Abstract

The invention discloses energy storage equipment and a control method and device thereof, a storage medium and a heat management system, the energy storage equipment 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 the energy storage system, and 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 method comprises the steps that the real-time temperature Td of a battery cell and the real-time temperature Two of cooling liquid are obtained; and according to the comparison result of the battery cell real-time temperature Td and the preset battery cell temperature Tds and the comparison result of the cooling liquid real-time temperature Two and the preset cooling liquid temperature Tws, the operation states of the compressor, the fan and the pump body are adjusted. The adjustment mode of the equipment is judged by combining the temperature of the battery cell and the temperature of the cooling liquid, and is not only based on the medium temperature. And meanwhile, the output proportion of the compressor, the output proportion of the fan and the output proportion of the water pump are cooperatively controlled and adjusted, so that the effects of timely cooling of the battery core and optimal energy efficiency are achieved.

Description

Technical Field

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

[0002] In the related art, energy storage temperature control equipment that uses a fixed frequency method to generate cooling medium has frequent shutdowns, resulting in large fluctuations in the temperature of the battery cells, which affects the energy storage performance and reliability of the energy storage equipment. Energy storage temperature control equipment that uses a variable frequency method to generate cooling medium usually controls the medium temperature, but is affected by objective factors (such as wind field uniformity, etc.), and the medium temperature will meet the control requirements, but the battery cell temperature will deviate, resulting in the battery cell cooling effect failing to achieve the expected result, resulting in greater energy consumption. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one object of the present invention is to provide a thermal management method for an energy storage device capable of adjusting the operating frequency of the device in real time.

[0004] The present invention also provides a thermal management system for an energy storage device.

[0005] The present invention also provides a computer-readable storage medium.

[0006] The present invention also provides a control device for an energy storage device.

[0007] The invention also provides an energy storage device.

[0008] According to a thermal management method for an energy storage device in accordance with an embodiment of a first aspect of the present invention, the energy storage device comprises 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 a second heat exchange medium in the refrigerant heat exchange system can exchange heat with the first heat exchange medium, the thermal management method comprises:

[0009] Get the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant;

[0010] 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.

[0011] In the thermal management method of the present application, 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 with the preset battery cell temperature Tds, and the real-time temperature of the coolant with the preset coolant temperature Tws, at least one of the compressor, fan and pump body is adjusted. Therefore, 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 only 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, cold plate heat exchange performance differences, pipeline flow fluctuations, etc. The output ratio of the compressor, the output ratio of the fan and the output ratio of the water pump are adjusted by coordinated control to achieve the effect of timely cooling of the battery cell temperature and optimal energy efficiency.

[0012] In some embodiments of the present invention, the control method also 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 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; 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 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.

[0013] In some embodiments of the present invention, 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 result of the real-time temperature Td of the battery cell with the preset battery cell temperature Tds, the real-time temperature Two of the coolant with 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.

[0014] In some embodiments of the present invention, 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.

[0015] In some embodiments of the present invention, the 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 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 comprises: 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 the output ratio of the fan is increased; if Two≤Tws-X2, then the output ratio of the fan is reduced. Wherein, X2 is the deviation value.

[0016] In some embodiments of the present invention, the adjusting the output ratio of the pump body and the output ratio of the fan 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 comprises: if the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant are both valid, Td≥Tds+X1, Two≥Tws+X2, then the output ratio of the fan is increased; if Td≥Tds+X1, Two≤Tws-X2, then the output ratio of the fan and the output ratio of the pump body are increased; if Td≤Tds-X1, and Two≥Tws+X2, then the output ratio of the fan and the output ratio of the pump body are reduced; if Td≤Tds-X1, and Two≤Tws-X2, then the output ratio of the fan is reduced. Wherein, X1 and X2 are deviation values.

[0017] In some embodiments of the present invention, the adjusting the output ratio of the pump body and the output ratio of the fan 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 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, then the output ratio of the fan is increased; if Td≤Tds-X1, then the output ratio of the fan is reduced. Wherein, X1 is the deviation value.

[0018] In some embodiments of the present invention, the adjusting the output ratio of the pump body and the output ratio of the fan 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 comprises: 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 the output ratio of the fan is increased; if Two≤Tws-X2, then the output ratio of the fan is reduced. Wherein, X2 is the deviation value.

[0019] In some embodiments of the present invention, 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-acquired, 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.

[0020] In some embodiments of the present invention, if the coolant real-time temperature Two and the battery cell real-time temperature Td are both invalid, the current operating states of the compressor, the pump body, and the fan are maintained.

[0021] According to the second aspect of the present invention, a thermal management system for energy storage equipment includes a memory and a processor, wherein the memory stores a computer program, and is characterized in that the processor implements the steps of the above method when executing the computer program.

[0022] According to the computer-readable storage medium of the third aspect of the present invention, it is characterized in that a thermal management control program of an energy storage device is stored thereon, and when the thermal management control program of the energy storage device is executed by a processor, the above-mentioned thermal management method of the energy storage device is implemented.

[0023] According to the control device of the energy storage device of the fourth aspect embodiment of the present invention, it is characterized in that 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 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, and the control device includes: an acquisition module, used to obtain the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant; a control module, 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.

[0024] The energy storage device according to the fifth aspect of the embodiment of the present invention includes the control device according to the above.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The process of the thermal management method according to the embodiment of the present invention is as follows Figure 1 ;

[0027] Figure 2 The process of the thermal management method according to the embodiment of the present invention is as follows Figure 2 ;

[0028] Figure 3 The process of the thermal management method according to the embodiment of the present invention is as follows Figure 3 ;

[0029] Figure 4 is a schematic diagram of a thermal management system according to an embodiment of the present invention.

[0030] Reference numerals

[0031] Energy storage device 100;

[0032] Coolant heat exchange system 11; pump body 111; expansion tank 112; first temperature sensor 1131; second temperature sensor 1132; first pressure sensor 1141; second pressure sensor 1142; heater 115;

[0033] Refrigerant heat exchange system 12; compressor 121; third temperature sensor 1221; fourth temperature sensor 1222; third pressure sensor 1231; fourth pressure sensor 1232; condenser 124; natural cooling heat exchanger 125; electronic expansion valve 126; fan 127; heat exchanger 13;

[0034] Energy storage system 2; battery cell 21; fifth temperature sensor 22; box body 3. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, 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 invention, and should not be construed as limiting the present invention.

[0036] The following describes a thermal management method for an energy storage device according to an embodiment of the present invention 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, and 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.

[0037] Reference Figure 4 The energy storage device 100 also includes an energy storage system, in which a battery unit is provided. The battery unit includes a plurality of battery cells so as to realize energy storage through the battery cells.

[0038] Among them, the energy storage device in this application is provided with a coolant heat exchange system and a refrigerant heat exchange system. The first heat exchange medium (i.e., coolant, such as water, etc.) 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. At the same time, the first heat exchange medium and the second heat exchange medium (i.e., refrigerant, such as fluoride, etc.) can exchange heat to adjust the temperature of the first heat exchange medium through the refrigerant heat exchange system, thereby reducing the temperature of the first heat exchange medium and meeting the cooling requirements of the energy storage system.

[0039] Reference Figure 4 A heater is provided in the coolant heat exchange system, which can heat the coolant to increase the temperature of the coolant. The coolant with increased temperature enters the energy storage system and exchanges heat with the battery to increase the temperature of the battery and prevent the battery temperature from being too low, thereby meeting the working requirements of the energy storage system in a low temperature environment.

[0040] Furthermore, 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 by 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.

[0041] Reference Figure 4 , wherein, 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 exchange heat by natural cooling, that is, by sending air through the fan, an airflow is formed 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 between the second heat exchange medium and the first 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.

[0042] Reference Figure 4In the coolant heat exchange system 11, it 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. Among them, the first temperature sensor 1131 and the first pressure sensor 1141 are respectively arranged at the liquid inlet end of the coolant heat exchange system 11, the first temperature sensor 1131 is used to detect the liquid inlet temperature of the coolant heat exchange system 11, and the first pressure sensor 1141 is used to detect the water inlet pressure of the coolant in the pipeline; the second temperature sensor 1132 and the second pressure sensor 1142 are respectively arranged at the liquid outlet end of the coolant heat exchange system 11, the second temperature sensor 1132 is used to detect the liquid outlet temperature of the coolant heat exchange system 11, and the second pressure sensor 1142 is used to detect the water 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 drive 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 .

[0043] Reference Figure 4 In the refrigerant heat exchange system 12, it 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 natural cooling heat exchanger 125, an electronic expansion valve 126 and a fan 127. Among them, the third temperature sensor 1221 and the third pressure sensor 1231 are respectively arranged between the heat exchanger 13 and the compressor 121, and are used to detect the refrigerant temperature (i.e., suction temperature) and pressure (i.e., evaporation pressure) on the intake side of the compressor 121, and the fourth temperature sensor 1222 and the fourth pressure sensor 1232 are respectively arranged between the compressor 121 and the condenser 124, and are used to detect the refrigerant temperature (exhaust temperature) and pressure (condensation pressure) on the exhaust side of the compressor 121. The refrigerant condenses at the condenser 124, and the fan 127 is arranged opposite to the condenser 124. The fan 127 can be used to increase the air flow rate at the condenser 124 to improve the condensation effect. The natural heat exchanger 13 is arranged 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 of the evaporator (ie, the heat exchanger 13 side) according to a preset program.

[0044] The energy storage system 2 in the present application includes a box 3 , which is used to arrange the battery cells 21 . The battery unit includes a fifth temperature sensor 22 , which is used to detect the temperature of the battery cells 21 .

[0045] Furthermore, the fan is also arranged 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.

[0046] The thermal management method according to the embodiment of the present application includes: obtaining the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant, and 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. Thus, the equipment in the thermal management system is controlled and adjusted according to the real-time temperature of the battery cell and the real-time temperature of the coolant to prevent the battery cell temperature from deviating from the temperature threshold range suitable for operation.

[0047] It should be noted that the method of adjusting the compressor output ratio includes adjusting the compression frequency of the compressor; the method of adjusting the fan output ratio includes adjusting the fan speed; and the method of adjusting the pump output ratio includes adjusting the compression frequency of the pump. The above adjustment methods are described below as examples.

[0048] 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. Figure 4 Two temperature sensors are provided in the coolant heat exchange system, one of which 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 coolant temperature Two in this application can be obtained by the above two temperature sensors.

[0049] Reference Figure 4 In the energy storage system, a battery cell temperature sensor is provided, and the battery cell temperature sensor is used to detect the temperature of the battery cell to obtain the real-time temperature Td of the battery cell.

[0050] It can be understood that 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 to the battery cell meets the preset requirements. If the preset temperature requirements are not met, the compressor, fan and pump body can be adjusted, so as to adjust the temperature regulation efficiency of the thermal management system for the battery cell, and then timely adjust the operation mode of the equipment in the thermal management system 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.

[0051] It should be noted that in the related art, energy storage temperature control equipment that uses a fixed frequency method to generate cooling medium has frequent shutdowns, resulting in large fluctuations in the temperature of the battery cells, thereby affecting the energy storage performance and reliability of the energy storage equipment. Energy storage temperature control equipment that uses a variable frequency method to generate cooling medium usually controls the medium temperature, but is affected by objective factors (such as wind field uniformity, etc.), and the medium temperature will meet the control requirements, but the battery cell temperature will deviate, resulting in the battery cell cooling effect failing to achieve the expected result, resulting in greater energy consumption.

[0052] In the thermal management method of the present application, 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 with the preset battery cell temperature Tds, and the real-time temperature of the coolant with the preset coolant temperature Tws, at least one of the compressor, fan and pump body is adjusted. Therefore, 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 only 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, cold plate heat exchange performance differences, pipeline flow fluctuations, etc.

[0053] It can be understood that the present application 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.

[0054] In some embodiments of the present application, the control method further includes acquiring the operating status of the compressor to further determine the operating mode of the thermal management system according to the operating status of the compressor, so as to control and adjust the equipment accordingly in multiple modes.

[0055] Among them, the thermal management system's cooling methods for the energy storage system include compressor cooling mode and natural cooling mode. The compressor cooling mode refers to: lowering the temperature of the coolant by exchanging heat between the refrigerant and the coolant in the refrigerant heat exchange system; the natural cooling mode refers to: lowering the temperature of the coolant by running the fan to generate airflow and air cooling. In different cooling modes, the operating status of the compressor is different.

[0056] Specifically, refer 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.

[0057] When the compressor is running, the thermal management system can use the compressor cooling mode to reduce the temperature of the coolant. 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 can use the natural cooling mode to reduce the temperature of the coolant.

[0058] Furthermore, 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.

[0059] It is understandable that when the compression frequency of the compressor is increased, it helps to reduce the refrigerant temperature; when the compression frequency of the compressor is reduced, the energy consumption of the refrigerant heat exchange system can be adaptively reduced. When the compression frequency of the pump body is increased, the flow rate of the coolant in the pipeline can be increased, the heat exchange effect between the coolant and the battery cell can be improved, and it helps to cool the battery cell; when the compression frequency of the pump body is reduced, the flow rate of the coolant in the pipeline can be reduced. When the speed of the fan is increased, the air flow rate in the thermal management system can be increased, thereby improving the cooling effect of the coolant; when the speed of the fan is reduced, the air flow rate in the thermal management system can be reduced accordingly.

[0060] In this application, based on the operating state of the compressor (which is also the cooling mode of the thermal management system), the compressor, pump body and fan are selectively controlled. In this way, the equipment in the thermal management system can be adjusted in a targeted manner to improve the temperature regulation effect of the thermal management system on the energy storage system.

[0061] like Figure 3 As shown, in some embodiments of the present application, according to the comparison results 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, adjusting the output ratio of the compressor, the output ratio of the pump body and the output ratio of the fan 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 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 the output ratio of the compressor is reduced. Wherein, X1 and X2 are deviation values.

[0062] Among them, the control strategy includes the action of adjusting the compressor output ratio, which is a control strategy for the thermal management system in the compressor cooling mode. First, it is necessary to satisfy that the obtained real-time temperature Td of the battery cell and the real-time temperature Two of the coolant are both valid, and then further compare the real-time temperature Td of the battery cell with the preset battery cell temperature Tds, the real-time temperature Two of the coolant and the preset coolant temperature Tws, and adjust the compression frequency of the compressor and the compression frequency of the pump body according to the comparison result.

[0063] It should be noted that 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) in 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) in 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 temperature of the coolant is controlled within a reasonable range. 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.

[0064] 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 a preset range and the temperature of the coolant is controlled within a preset range, the current operating state of the device can be maintained.

[0065] Regarding the "battery cell real-time temperature Td" and "coolant real-time temperature Two", it means that the thermal management system (such as: acquisition module, control module) can effectively obtain the battery cell real-time temperature parameter Td and the coolant real-time temperature Two. It is understandable that if the temperature sensor used to detect the battery cell and the coolant fails and cannot feed back the detected temperature information to the control module, the battery cell real-time temperature Td and the coolant real-time temperature Two temperature information cannot be effectively obtained, and the device cannot be controlled by the above control strategy.

[0066] In this application, by comparing the real-time temperature Td of the battery cell with the preset battery cell temperature Tds, and the real-time temperature Two of the coolant with the preset coolant temperature Tw, the heat exchange state of the battery cell can be judged, and the comparison result is expected to further adjust the compressor and pump body. Among them, the "heat exchange state of the battery cell" can include: whether the temperature of the battery cell is controlled within the temperature threshold suitable for operation, whether the temperature of the coolant meets the heat exchange requirements of the battery cell, etc.

[0067] 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.

[0068] 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 on the refrigerant heat exchange system side 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 relatively 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.

[0069] It should be noted that the way to reduce the heat exchange efficiency of the thermal management system includes: reducing the compression frequency of the compressor and reducing the compression frequency of the pump body; the way to improve the heat exchange efficiency of the thermal management system includes: increasing the compression frequency of the compressor and increasing the compression frequency of the pump body. Therefore, the operating state of the equipment in the thermal management system can be adjusted in time according to the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant, which can play the effect of timely adjusting the temperature of the battery cell.

[0070] In some embodiments of the present application, 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.

[0071] It can be understood that the invalid coolant real-time temperature Two means that the control module does not obtain the coolant real-time temperature Two, which means that the temperature sensor used to detect the coolant temperature may be faulty.

[0072] Among them, the control strategy includes the action of adjusting the compressor output ratio, which is a control strategy for the thermal management system in the compressor cooling mode. The obtained real-time temperature Td of the battery cell is valid and the real-time temperature Two of the coolant is invalid. At this time, the equipment in the thermal management system cannot be adjusted based on the real-time temperature Two of the coolant. Therefore, the equipment (compressor) in the thermal management system is adjusted only based on the comparison result between the real-time temperature Td of the battery cell and the preset battery temperature Tds.

[0073] When Td≥Tds+X1, it means that the current battery cell temperature is too high and needs to be further cooled. The temperature of the refrigerant 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 temperature of the battery cell has been adjusted to a lower level, and the heat exchange efficiency of the thermal management system can be adaptively reduced. It can also meet the temperature adjustment requirements of the battery cell and prevent the battery cell temperature from being too low.

[0074] In some embodiments of the present application, 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 fan; if Two≤Tws-X2, then reducing the output ratio of the fan; wherein X2 is the deviation value.

[0075] It can be understood that the invalid real-time temperature Td of the battery cell means that the control module does not obtain the real-time temperature Td of the battery cell, which means that the temperature sensor used to detect the temperature of the battery cell may be faulty.

[0076] Among them, this control strategy is a control strategy for the thermal management system in the compressor cooling mode. The obtained coolant real-time temperature Two is valid and the battery cell real-time temperature Td is invalid. At this time, the equipment in the thermal management system cannot be adjusted based on the battery cell real-time temperature Td. Therefore, the equipment (fan) in the thermal management system is adjusted only based on the comparison result between the coolant real-time temperature Two and the preset coolant temperature Tws.

[0077] 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 to reduce the coolant temperature by increasing the fan output ratio. 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 from being too low in temperature.

[0078] In some embodiments of the present application, 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 acquired 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 the output ratio of the fan and the output ratio of the pump body are increased; if Td≤Tds-X1, and Two≥Tws+X2, then the output ratio of the fan and the output ratio of the pump body are reduced; if Td≤Tds-X1, and Two≤Tws-X2, then the output ratio of the fan is reduced; wherein, X1 and X2 are deviation values.

[0079] Among them, this control strategy is a control strategy for the thermal management system in natural cooling mode. When the obtained real-time temperature Td of the battery cell and the real-time temperature Two of the coolant are both valid, the real-time temperature Td of the battery cell is further compared with the preset battery temperature Tds, the real-time temperature Two of the coolant and the preset coolant temperature Tws, and the output ratio of the fan and the pump is adjusted according to the comparison result.

[0080] Specifically, when Td≥Tds+X1, Two≥Tws+X2, the output ratio of the fan is increased to enhance the cooling effect of the thermal management system on the coolant. Since the temperature of the coolant is relatively high, increasing or decreasing the output ratio of the pump may cause negative effects (such as causing the battery cell temperature to further increase), so there is no need to adjust the output ratio of the pump.

[0081] When Td≥Tds+X1, Two≤Tws-X2, the output ratio of the fan is increased to improve the cooling effect of the thermal management system on the coolant, and the output ratio of the pump body is 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 cell. Among them, the temperature of the coolant is relatively low, which can meet the heat exchange requirements of reducing the temperature of the battery cell, and the temperature of the battery cell is too high at this time, so the heat exchange efficiency of the thermal management system can be improved by increasing the output ratio of the pump body.

[0082] 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.).

[0083] 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.

[0084] In some embodiments of the present application, 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.

[0085] It can be understood that the invalid coolant real-time temperature Two means that the control module does not obtain the coolant real-time temperature Two, which means that the temperature sensor used to detect the coolant temperature may be faulty.

[0086] Among them, this control strategy is a control strategy for the thermal management system in natural cooling mode. The obtained real-time temperature Td of the battery cell is valid and the real-time temperature Two of the coolant is invalid. At this time, the equipment in the thermal management system cannot be adjusted based on the real-time temperature Two of the coolant. Therefore, the equipment (fan) in the thermal management system is adjusted only based on the comparison result between the real-time temperature Td of the battery cell and the preset battery temperature Tds.

[0087] 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.

[0088] 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.

[0089] In some embodiments of the present application, 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.

[0090] It can be understood that the invalid real-time temperature Td of the battery cell means that the control module does not obtain the real-time temperature Td of the battery cell, which means that the temperature sensor used to detect the temperature of the battery cell may be faulty.

[0091] Among them, this control strategy is a control strategy for the thermal management system in natural cooling mode. The obtained real-time coolant temperature Two is valid and the real-time cell temperature Td is invalid. At this time, the equipment in the thermal management system cannot be adjusted based on the real-time cell temperature Td. Therefore, the equipment (fan) in the thermal management system is adjusted only based on the comparison result between the real-time coolant temperature Two and the preset coolant temperature Tws.

[0092] When Two≥Tws+X2, the output ratio of the fan is increased. At this time, the current temperature of the coolant is high and the temperature of the coolant needs to be further reduced. Therefore, the air flow rate in the thermal management system can be increased by increasing the output ratio of the fan to reduce the temperature of the coolant.

[0093] 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 cells. Therefore, the output ratio of the fan can be adaptively reduced to reduce energy consumption in the thermal management system.

[0094] Regarding the above-mentioned multiple control steps, it should be noted that 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 effective real-time battery cell temperature Td and the real-time coolant temperature Two.

[0095] Reference Figure 3 , where the priority when both the battery cell real-time temperature Td and the coolant real-time temperature Two are valid is higher than the priority when only one of the battery cell real-time temperature Td and the coolant real-time temperature Two is valid. The priority when only the battery cell real-time temperature Td is valid among the battery cell real-time temperature Td and the coolant real-time temperature Two is higher than the priority when only the coolant real-time temperature Two is 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 adjusted based on the detection results, and the compressor output ratio, the fan output ratio and the 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 achieve the best effect.

[0096] It should be further explained that, when the real-time battery cell temperature Td and the real-time coolant temperature Two are both valid, the comparison priority 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 can be adjusted accordingly according to the control requirements, such as: first compare the real-time battery cell temperature Td with the preset battery cell temperature Tds, and based on the comparison result of the real-time battery cell temperature Td and the preset battery cell temperature Tds, further compare the real-time coolant temperature Two with the preset coolant temperature Tws.

[0097] In some embodiments of the present application, 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-acquired, 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.

[0098] 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 specifically limited here.

[0099] It is understandable that the present application uses a variable frequency method to adjust the temperature of the coolant. After detecting the temperature of the battery cell and the coolant, the operating state of the equipment (compressor, fan, pump body) is further controlled based on the comparison results, so as to achieve the purpose of timely cooling the battery cell and optimize the energy efficiency of the thermal management system. Since the battery cell temperature and coolant temperature in the energy storage device are constantly changing, the equipment adaptability in the thermal management system can be adjusted by periodic detection and adjustment, and the battery cell can be cooled in time by real-time detection and real-time adjustment corresponding to the comparison results.

[0100] In some embodiments of the present application, if the real-time temperature Two of the coolant and the real-time temperature Td of the battery are both invalid, the current operating state of the compressor, pump body and fan is maintained. At this time, the temperature sensor cannot obtain the real-time temperature Two of the coolant and the real-time temperature Td of the battery. In order to ensure the reliability and stability of the energy storage system, the current operating state of the equipment (compressor, pump body and fan) in the thermal management system can be maintained.

[0101] In some optional embodiments of the present application, the output ratio adjustment method of the compressor includes: increasing the compression frequency of the compressor, decreasing the compression frequency of the compressor, taking the current frequency of the compressor as q1 as an example, the adjusted compression frequency of the compressor is Q1, when the compression frequency of the compressor is increased, Q1=q1+1Hz, when the compression frequency of the compressor is decreased, Q1=q1-1Hz. The above is illustrated by taking the adjustment value of 1Hz as an example, and is not specifically limited.

[0102] In some optional embodiments of the present application, the output ratio adjustment method of the pump body includes: increasing the compression frequency of the pump body, decreasing the compression frequency of the pump body, taking the current frequency of the pump body as q2 as an example, the adjusted compression frequency of the pump body is Q2, when the compression frequency of the pump body is increased, Q2=101%q2, when the compression frequency of the pump body is decreased, Q2=99%q2. Among them, the above adjustment range is 1% of the current compression frequency of the pump body, and the above adjustment range is for illustration only and is not specifically limited.

[0103] In some optional embodiments of the present application, the output ratio adjustment method of the fan includes: increasing the speed of the fan, decreasing the speed of the fan, taking the current frequency of the fan as q3 as an example, the adjusted fan speed is Q3, when the fan speed is increased, Q3 = 101% q3, when the fan speed is decreased, Q3 = 99% q3. Among them, the above adjustment range is 1% of the current fan speed, and the above adjustment range is for example and is not specifically limited.

[0104] According to the control device of the energy storage device of the embodiment of the present application, 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 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, and the control device includes: an acquisition module, used to obtain the real-time temperature Td of the battery cell and the real-time temperature Two of the coolant; a control module, 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.

[0105] It should be noted that the functional modules in the control device in the present application (such as: acquisition module, control module) 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, so as to achieve the effect of timely cooling the battery cell temperature and optimizing energy efficiency.

[0106] The energy storage device according to the embodiment of the present application includes the above-mentioned control device.

[0107] The thermal management system for energy storage equipment according to the present application includes a memory and a processor, the memory stores a computer program, and is characterized in that the processor implements the steps of the above-mentioned thermal management method when executing the computer program.

[0108] The computer-readable storage medium according to the present application is characterized in that a thermal management control program of an energy storage device is stored thereon, and 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.

[0109] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, 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 in other suitable ways if necessary, and then stored in a computer memory.

[0110] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0111] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0112] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0113] In addition, the terms "first", "second", etc. used in the embodiments of the present invention 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 present embodiment. Therefore, the features defined by the terms "first", "second", etc. in the embodiments of the present invention can explicitly or implicitly indicate that the embodiment includes at least one of the features. In the description of the present invention, the word "multiple" means at least two or two or more, such as two, three, four, etc., unless otherwise clearly and specifically defined in the embodiments.

[0114] In the present invention, unless otherwise clearly specified or limited in the embodiments, the terms "installed", "connected", "connected" and "fixed" etc. in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection. It can be understood that 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 connection of two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific implementation situation.

[0115] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature 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. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0116] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A thermal management method for energy storage equipment, characterized in that: 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 thermal management method includes: 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, characterized in that 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, characterized in that 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, characterized in that: 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 claim 2, characterized in that: 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 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.

6. The method according to claim 2, characterized in that 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 claim 2, characterized in that 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 claim 2, characterized in that: 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, characterized in that 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, characterized in that: 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, characterized in that: A thermal management control program of an energy storage device is stored thereon, and 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 according to any one of claims 1 to 10 is implemented.

12. A control device for an energy storage device, characterized in that: 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 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: 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, characterized in that: Comprising a control device according to claim 12.

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