A thermal management method, energy storage system, storage medium and program product

Abstract

The present application provides a thermal management method, energy storage system, storage medium and program product, wherein the thermal management method includes: obtaining the ambient temperature of the energy storage system and the heating power of the battery cells of the battery pack; when the heating power of the battery cells is not greater than the preset power threshold, determining the target side of each shared cooling module based on the ambient temperature; when the heating power of the battery cells is greater than the preset power threshold, determining the target side of each shared cooling module based on the ambient temperature, the heating power of the battery cells and the operating time of the battery pack; connecting the shared cooling module to the target cold circulation loop of the target side so that the shared cooling module dissipates heat to the target side. The above scheme enables the thermal management system to adjust the cooling strategy based on the ambient temperature, the heating power of the battery cells and the operating time of the battery pack, which is conducive to improving the flexibility and adaptability of thermal management.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a thermal management method, an energy storage system, a storage medium, and a program product. Background Art

[0002] The containerized energy storage system (CESS) is a highly integrated energy storage solution that integrates key components such as battery packs, energy storage inverter PCS groups, battery management systems BMS, and energy management systems EMS in a container. Since the working status of the energy storage inverter group and the battery pack group is related to the ambient temperature of the components, a thermal management system for thermal management of the energy storage inverter group and the battery pack group will also be provided in the containerized energy storage system. Through the application of the thermal management system, the energy storage inverter group and the battery pack group can operate within the optimal temperature range.

[0003] At present, most of the thermal management systems in related technologies perform thermal management on the battery pack group and the energy storage inverter group separately. The thermal management system on the battery pack side and the thermal management system on the energy storage inverter group side are both in an independent state, resulting in poor thermal management flexibility of the energy storage system. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a thermal management method, an energy storage system, a storage medium, and a program product to improve the thermal management flexibility of the energy storage system.

[0005] In a first aspect, an embodiment of the present application provides a thermal management method, which is applied to a thermal management system, wherein the thermal management system includes one or more shared cooling modules shared between an energy storage converter group side and a battery pack group side in an energy storage system, and the method includes:

[0006] Obtaining the ambient temperature of the energy storage system and the heating power of the battery cells of the battery pack;

[0007] When the heating power of the battery cell is not greater than the preset power threshold, the target side of each shared cooling module is determined based on the ambient temperature; wherein the target side is the side with a greater temperature control demand between the energy storage inverter group side and the battery pack group side;

[0008] When the heating power of the battery cell is greater than the preset power threshold, determining the target side of each of the shared cooling modules based on the ambient temperature, the heating power of the battery cell and the operating time of the battery pack group;

[0009] The shared cooling module is connected to the target cold circulation loop of the target side so that the shared cooling module dissipates heat for the target side.

[0010] In the process of implementing the above scheme, the target side of the shared cooling module is determined by comprehensively considering the heating power of the battery cells, the ambient temperature and the operating time of the battery pack. On the one hand, it enables the thermal management system to adjust the cooling strategy based on the ambient temperature, the heating power of the battery cells and the operating time of the battery pack, which is beneficial to improving the flexibility and adaptability of thermal management. On the other hand, the thermal management method reduces the overall energy consumption of the thermal management system through the flexible deployment of the shared cooling module, which is beneficial to improving the energy efficiency of the thermal management system and reducing the thermal management energy consumption.

[0011] In an implementation of the first aspect, the target side of each shared cooling module is determined based on the ambient temperature, the heating power of the battery cell and the operating time of the battery pack group, including: determining the target power partition to which the heating power of the battery cell belongs and the continuous operating time of the power of the battery pack group in the target power partition; determining the target side of each shared cooling module based on the ambient temperature, the target power partition and the continuous operating time of the power.

[0012] In the process of implementing the above scheme, the target side of the shared cooling module is jointly determined based on the ambient temperature, the target power partition and the power operation time, so that the shared cooling module can be allocated according to the temperature control requirements. On the one hand, it is beneficial to improve the energy efficiency of the thermal management system; on the other hand, comprehensive consideration of factors such as ambient temperature, target power partition and power operation time enables the shared cooling module to be reasonably allocated, which is beneficial to reducing the energy waste of the above thermal management system.

[0013] In an implementation of the first aspect, the target side of each shared cooling module is determined based on the ambient temperature, the target power partition and the continuous power operation time, including: based on the ambient temperature, the target power partition and the continuous power operation time, using a first mapping relationship to determine the target side of each shared cooling module; wherein the first mapping relationship is used to characterize the correspondence between the ambient temperature, the target power partition and the continuous power operation time and the target side of the shared cooling module.

[0014] In the implementation process of the above solution, the predetermined first mapping relationship can be used to quickly determine the target side of each shared cooling module based on ambient temperature, power partition and power continuous operation time, which is beneficial to improving the thermal management efficiency of the above thermal management method.

[0015] In an implementation of the first aspect, the target side of each shared cooling module is determined based on the ambient temperature, the heating power of the battery cell, and the operating time of the battery pack group, including: determining the target side of each shared cooling module based on the ambient temperature, the heating power of the battery cell, the operating time of the battery pack group and the power consumption of each shared cooling module.

[0016] In the process of implementing the above scheme, the target side of each shared cooling module is comprehensively considered by comprehensively considering the ambient temperature, the heat power of the battery cells, the operating time of the battery pack and the power consumption of each shared cooling module, which is beneficial to improving the energy efficiency of the above thermal management system.

[0017] In an implementation of the first aspect, the thermal management system further includes a first dedicated cooling module disposed on the energy storage converter group side and a second dedicated cooling module disposed on the battery pack group side, and determining a target side of each of the shared cooling modules based on the ambient temperature, the heating power of the battery cell, and the operating time of the battery pack group includes:

[0018] Based on the ambient temperature, the heat generation power of the battery cells, the operating time of the battery pack group, the power consumption of the shared cooling module, the power consumption of the first dedicated cooling module, and the power consumption of the second dedicated cooling module, the target side of each shared cooling module, the triggering state of the first dedicated cooling module, and the triggering state of the second dedicated cooling module are determined.

[0019] During the implementation of the above scheme, the working state of the thermal management system can be comprehensively determined based on the ambient temperature, the heat generation power of the battery cells, the operating time of the battery pack, the power consumption of the shared cooling module, the power consumption of the first dedicated cooling module, and the power consumption of the second dedicated cooling module. On the one hand, it is beneficial to improve the energy efficiency of the above thermal management system; on the other hand, the above scheme can flexibly adjust the working state of the thermal management system, which is beneficial to improving the thermal management flexibility of the above thermal management system.

[0020] In an implementation of the first aspect, determining a target side of each of the shared cooling modules, a trigger state of the first dedicated cooling module, and a trigger state of the second dedicated cooling module based on the ambient temperature, the heating power of the battery cell, the operating time of the battery pack group, the power consumption of the shared cooling module, the power consumption of the first dedicated cooling module, and the power consumption of the second dedicated cooling module includes:

[0021] Based on the ambient temperature, the heating power of the battery cell, the operating time of the battery pack group, the power consumption of the shared cooling module, the power consumption of the first dedicated cooling module, and the power consumption of the second dedicated cooling module, a second mapping relationship is used to determine the target side of each of the shared cooling modules, the triggering state of the first dedicated cooling module, and the triggering state of the second dedicated cooling module;

[0022] Among them, the second mapping relationship is used to characterize the correspondence between the ambient temperature, the heating power of the battery cell, the operating time of the battery pack group, the power consumption of the shared cooling module, the power consumption of the first dedicated cooling module, and the power consumption of the second dedicated cooling module and the target side of each shared cooling module, the trigger state of the first dedicated cooling module, and the trigger state of the second dedicated cooling module under the constraint of the lowest overall operating power consumption of the thermal management system.

[0023] In the implementation process of the above scheme, a predetermined second mapping relationship can be utilized to quickly determine the target side of each shared cooling module, the trigger state of the first dedicated cooling module, and the trigger state of the second dedicated cooling module based on the ambient temperature, the heat generation power of the battery cells, the operating time of the battery pack, the power consumption of the shared cooling module, the power consumption of the first dedicated cooling module, and the power consumption of the second dedicated cooling module, which is beneficial to improving the thermal management efficiency of the management method.

[0024] In an implementation of the first aspect, the thermal management system also includes a dehumidification module, and the method also includes: obtaining the ambient humidity of the energy storage system; when the ambient humidity is greater than a humidity threshold, turning on the dehumidification module to reduce the ambient humidity to a humidity value not greater than the humidity threshold.

[0025] In the process of implementing the above scheme, by monitoring the ambient humidity of the energy storage system, the dehumidification module is turned on when the ambient humidity is greater than the humidity threshold, thereby dehumidifying the energy storage system. The dehumidification function is beneficial to maintaining the internal humidity of the system at an appropriate level, thereby improving the safety of the energy storage system.

[0026] In an implementation of the first aspect, the thermal management system further includes a heating module, and the method further includes:

[0027] When the energy storage system is started, obtaining the ambient temperature of the energy storage system, the cell temperature of the battery pack group, and the starting mode of the battery pack group;

[0028] If the ambient temperature, the battery cell temperature and the startup mode meet the preset heating conditions, the heating module is turned on.

[0029] In the process of implementing the above scheme, the heating module is controlled to heat the battery pack. On the one hand, the battery pack can operate within a better temperature range, which is beneficial to improving the reliability of the energy storage system; on the other hand, the energy storage system can be applied to more application scenarios, which is beneficial to improving the adaptability of the energy storage system.

[0030] In an implementation of the first aspect, the method further includes:

[0031] When the operating time of the battery pack group is not greater than a preset time threshold, determining the target side of each of the shared cooling modules based on the ambient temperature;

[0032] When the heating power of the battery cell is greater than a preset power threshold, determining the target side of each shared cooling module based on the ambient temperature, the heating power of the battery cell and the operating time of the battery pack group includes:

[0033] When the operating time of the battery pack group is greater than the preset time threshold and the heating power of the battery cell is greater than the preset power threshold, the target side of each shared cooling module is determined based on the ambient temperature, the heating power of the battery cell and the operating time of the battery pack group.

[0034] In the implementation process of the above scheme, at the initial start-up of the energy storage system, the target side of the shared cooling module is determined only based on the ambient temperature. On the one hand, the above thermal management method can respond quickly to changes in ambient temperature, which is beneficial to improving the response speed of the above thermal management system. On the other hand, at the initial start-up of the energy storage system, using ambient temperature as the main control parameter can reduce energy waste, which is beneficial to improving the overall energy consumption of the above thermal management system.

[0035] In a second aspect, an embodiment of the present application provides a thermal management system, which is applied to an energy storage system, wherein the energy storage system includes an energy storage converter group and a battery pack group, and the thermal management system includes: one or more shared cooling modules, a first acquisition module, a second acquisition module and a processing module, wherein the shared cooling module, the first acquisition module and the second acquisition module are electrically connected to the processing module respectively, wherein:

[0036] The shared cooling module is shared between the energy storage converter group and the battery pack group;

[0037] The first acquisition module is used to obtain the ambient temperature of the energy storage system;

[0038] The second acquisition module is used to obtain the heating power of the battery cells of the battery pack;

[0039] The processing module is used to obtain the ambient temperature of the energy storage system and the heating power of the battery cells of the battery pack group; when the heating power of the battery cells is not greater than a preset power threshold, the target side of each shared cooling module is determined based on the ambient temperature; wherein the target side is the side with a greater temperature control demand between the energy storage inverter group side and the battery pack group side; when the heating power of the battery cells is greater than the preset power threshold, the target side of each shared cooling module is determined based on the ambient temperature, the heating power of the battery cells and the operating time of the battery pack group; the shared cooling module is connected to the target cold circulation loop of the target side so that the shared cooling module dissipates heat from the target side.

[0040] In an implementation of the second aspect, the thermal management system further includes: a first dedicated cooling module disposed on the energy storage converter group side and a second dedicated cooling module disposed on the battery pack group side; the first dedicated cooling module and the second dedicated cooling module are electrically connected to the processing module respectively;

[0041] The processing module is also used to determine the target side of each shared cooling module, the trigger state of the first dedicated cooling module, and the trigger state of the second dedicated cooling module based on the ambient temperature, the heat generation power of the battery cell, the operating time of the battery pack group, the power consumption of the shared cooling module, the power consumption of the first dedicated cooling module, and the power consumption of the second dedicated cooling module.

[0042] In an implementation of the first aspect, the first dedicated cooling module includes: a liquid cooling unit that utilizes a coolant circulation to dissipate heat from the energy storage converter group.

[0043] In an implementation of the first aspect, the second dedicated cooling module includes: a compressor refrigeration unit that uses compressor refrigeration to dissipate heat from the battery pack group.

[0044] In an implementation of the first aspect, the thermal management system further includes: a dehumidification module;

[0045] The processing module is further used to: obtain the ambient humidity of the energy storage system; and when the ambient humidity is greater than a humidity threshold, turn on the dehumidification module to reduce the ambient humidity to a humidity value not greater than the humidity threshold.

[0046] In an implementation of the first aspect, the thermal management system further includes: a heating module;

[0047] The processing module is also used to: when the energy storage system is started, obtain the ambient temperature of the energy storage system, the battery cell temperature of the battery pack group and the starting method of the battery pack group; if the ambient temperature, the battery cell temperature and the starting method meet the preset heating conditions, turn on the heating module.

[0048] In a third aspect, an embodiment of the present application provides an energy storage system, comprising: an energy storage inverter group, a battery pack group and a thermal management system, wherein the thermal management system is a thermal management system provided by the second aspect or any possible implementation of the second aspect.

[0049] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer program instructions are stored. When the computer program instructions are read and executed by a processor, the method provided by the first aspect or any possible implementation of the first aspect is executed.

[0050] In a fifth aspect, an embodiment of the present application provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the method provided by the first aspect or any possible implementation manner of the first aspect.

[0051] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the embodiments of the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 A schematic diagram of the structure of a thermal management system provided in an embodiment of the present application;

[0054] Figure 2 A schematic diagram of a thermal management method according to an embodiment of the present invention;

[0055] Figure 3 A schematic diagram of the structure of a thermal management system of another architecture provided in an embodiment of the present application;

[0056] Figure 4A schematic diagram of the structure of a thermal management system in a certain application scenario provided in an embodiment of the present application;

[0057] Figure 5 A schematic diagram of the operating logic of a thermal management method in a certain application scenario provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] The following will describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0059] The energy storage inverter group and battery pack group are key components of the energy storage system. They generate heat during operation. If effective thermal management is not performed, it may lead to problems such as component performance degradation and shortened life, and even safety accidents. The thermal management system can adjust the temperature of components such as the energy storage inverter group and battery pack group during the operation of the energy storage system, so that each component can work efficiently at an appropriate temperature.

[0060] Related technologies usually design the battery side and the energy storage inverter side as two independent thermal management systems, each of which has an independent cooling circuit and does not interfere with each other. However, this independent design method will make it impossible to obtain cooling compensation from the other side when the cooling capacity of one side is insufficient, or it will be impossible to compensate for the cooling capacity of the other side when the cooling capacity of one side is sufficient, resulting in poor thermal management flexibility of the energy storage system.

[0061] Based on this, an embodiment of the present application provides a thermal management method, which comprehensively considers the heating power of the battery cells, the ambient temperature and the operating time of the battery pack to determine the target side of the shared cooling module shared between the energy storage inverter side and the battery pack side. On the one hand, it enables the thermal management system to adjust the cooling strategy based on the ambient temperature, the heating power of the battery cells and the operating time of the battery pack, which is conducive to improving the flexibility and adaptability of thermal management; on the other hand, the thermal management method reduces the overall energy consumption of the thermal management system through flexible deployment of shared cooling modules, which is conducive to improving the energy efficiency of the thermal management system.

[0062] It can be understood that, since the above-mentioned thermal management method is related to the architecture of the thermal management system, the following content will describe the thermal management method in conjunction with the architecture of the thermal management system.

[0063] See also Figure 1The embodiment of the present application provides a thermal management system 100, which is applied to an energy storage system 200. The energy storage system 200 includes an energy storage converter group 210 and a battery pack group 220. The thermal management system 100 includes: one or more shared cooling modules 110, a first acquisition module 120, a second acquisition module 130 and a processing module 140. The shared cooling module 110, the first acquisition module 120 and the second acquisition module 130 are electrically connected to the processing module 140, respectively, wherein:

[0064] The shared cooling module 110 is shared between the energy storage converter group 210 and the battery pack group 220 and is used to perform heat dissipation processing on the energy storage converter group 210 and / or the battery pack group 220;

[0065] The first acquisition module 120 is used to obtain the ambient temperature of the energy storage system 200. ;

[0066] The second acquisition module 130 is used to obtain the heating power of the battery cell of the battery pack 220 ;

[0067] The processing module 140 is used to: obtain the ambient temperature of the energy storage system 200 and the heating power of the battery cells of the battery pack group 220; when the heating power of the battery cells is not greater than the preset power threshold, determine the target side of each shared cooling module 110 based on the ambient temperature; wherein the target side is the side with a greater temperature control demand between the energy storage inverter group side and the battery pack group side; when the heating power of the battery cells is greater than the preset power threshold, determine the target side of each shared cooling module 110 based on the ambient temperature, the heating power of the battery cells and the operating time of the battery pack group; connect the shared cooling module 110 to the target cold circulation loop of the target side so that the shared cooling module 110 dissipates heat from the target side.

[0068] Exemplarily, the shared cooling module 110 can be connected to the cold circulation loop on the PCS side (i.e., the energy storage inverter group side) and the cold circulation loop on the PACK side (i.e., the battery pack group side) respectively through pipelines provided with electric valves. The electrical connection relationship between the shared cooling module 110 and the processing module 140 includes the electrical connection between the electric valve in the shared cooling module 110 and the processing module 140. The processing module 140 controls whether the shared cooling module 110 is connected to the corresponding cold circulation loop by controlling the opening and closing of the electric valve.

[0069] Exemplarily, the shared cooling module 110 may be a cooling module such as an air cooling module, a liquid cooling module, a compressor cooling module, etc. In addition, when the thermal management system 100 is provided with a plurality of shared cooling modules 110, a plurality of types of cooling modules may be provided, for example: in a certain scenario, the thermal management system 100 is provided with three shared cooling modules 110, including one air cooling module, one liquid cooling module, and one compressor cooling module.

[0070] It can be understood that the above-mentioned shared cooling module 110 can be connected to the PCS side cold circulation loop (energy storage inverter group side cold circulation loop) and the PACK side cold circulation loop (battery pack group side cold circulation loop) separately, and can also be connected to the PCS side cold circulation loop and the PACK side cold circulation loop at the same time, that is, the target side of the shared cooling module 110 can be one or both sides of the energy storage inverter group side and the battery pack group side. Taking the thermal management system 100 including only one shared cooling module 110 as an example, if the shared cooling module 110 is connected to the PCS side cold circulation loop and the PACK side cold circulation loop at the same time, then the cold circulation path can be a series cold circulation loop, for example: energy storage inverter group 210 → shared cooling module 110 → battery pack group 220 → energy storage inverter group 210; the cold circulation loop can also be a parallel cold circulation loop, for example: energy storage inverter group 210 → shared cooling module 110 → energy storage inverter group 210, battery pack group 220 → shared cooling module 110 → battery pack group 220. The specific cold circulation loop can be set according to the specific application scenario, and the embodiments of the present application will not be repeated.

[0071] In addition, it can be understood that, taking the thermal management system 100 including only one shared cooling module 110 as an example, the shared cooling module 110 is connected to the energy storage inverter group side and the battery pack group side at the same time, including:

[0072] (1) The temperature control requirements of the energy storage inverter group side and the battery pack group side are the same, and the shared cooling module 110 can provide sufficient cooling capacity for the energy storage inverter group side and the battery pack group side;

[0073] (2) The temperature control requirements of the energy storage inverter group side and the battery pack group side are different, but the shared cooling module 110 can provide sufficient cooling capacity for the energy storage inverter group side and the battery pack group side.

[0074] Exemplarily, the first acquisition module 120 may be a temperature sensor disposed in the energy storage system 200 , and may be capable of acquiring the ambient temperature of the energy storage system 200 .

[0075] Exemplarily, the second acquisition module 130 may obtain the heating power of the battery cells of the battery pack 220 in a variety of ways, for example:

[0076] (1) The discharge current and voltage of the battery pack can be measured and the heating power of the battery cell can be calculated using a certain algorithm;

[0077] (2) The battery surface temperature can be monitored by devices such as thermal imaging cameras and temperature sensors to estimate the heating power of the battery cell;

[0078] (3) The battery current data, voltage data, and temperature data can be obtained by connecting to the Battery Management System (BMS), and these data can be processed through a certain algorithm to estimate the heating power of the battery cell.

[0079] It is understandable that the method for obtaining the heating power of the battery cell can adopt the more mature technology in the relevant technology, and it is sufficient to be able to obtain the heating power of the battery cell of the battery pack group 220, and the embodiments of the present application will not be repeated.

[0080] The following is an introduction to the thermal management method applied to the processing module 140 under the architecture of the thermal management system 100:

[0081] See also Figure 2 The embodiment of the present application provides a thermal management method, which is applied to a thermal management system 100. The thermal management system 100 includes one or more shared cooling modules 110 shared between an energy storage converter group 210 and a battery pack group 220 in an energy storage system 200. The thermal management method includes:

[0082] Step S310: Acquire the ambient temperature of the energy storage system 200 and the heating power of the battery cells of the battery pack 220;

[0083] Step S320: When the heating power of the battery cell is not greater than the preset power threshold, the target side of each shared cooling module 110 is determined based on the ambient temperature; wherein the target side is the side with a greater temperature control demand between the energy storage converter group 210 side and the battery pack group 220 side;

[0084] Step S330: when the heating power of the battery cell is greater than a preset power threshold, determining the target side of each shared cooling module 110 based on the ambient temperature, the heating power of the battery cell and the operating time of the battery pack 220;

[0085] Step S340: connecting the shared cooling module 110 to the target cold circulation loop of the target side, so that the shared cooling module 110 dissipates heat for the target side.

[0086] In the above step S310, the first acquisition module 120 in the thermal management system 100 can be used to obtain the ambient temperature of the energy storage system 200, and the second acquisition module 130 in the thermal management system 100 can be used to obtain the heating power of the battery cells of the battery pack 220. The scheme of the first acquisition module 120 collecting the ambient temperature of the energy storage system 200 and the scheme of the second acquisition module 130 obtaining the heating power of the battery cells of the battery pack 220 can be found in the above description of the thermal management system 100, which will not be repeated in the present embodiment.

[0087] It is understandable that, since the heat generated by the battery pack 220 is less when the heating power of the battery cell is not greater than the preset power threshold, the target side of each shared cooling module can be determined in the above step S320 only according to the ambient temperature. The following takes the scenario where the thermal management system 100 includes only one shared cooling module 110 and the scenario where it includes multiple shared cooling modules 110 as examples to introduce the optional implementation of the above step S320:

[0088] Scenario 1: The thermal management system 100 includes only one shared cooling module 110;

[0089] Implementation method one, in scenario one, if it is assumed that the temperature in the energy storage system 200 is evenly distributed, and the natural heat dissipation capacity of the energy storage inverter group 210 and the battery pack group 220 is not considered, the ambient temperature at the energy storage inverter group 210 and the battery pack group 220 is the same, then the temperature control requirement on the energy storage inverter group side is the same as the temperature control requirement on the battery pack group side. At this time, the target side of the shared cooling module 110 can be determined as the energy storage inverter group side and the battery pack group side, and the shared cooling module 110 can provide cooling for both the energy storage inverter group side and the battery pack group side.

[0090] Implementation method 2: In scenario 1, taking into account the temperature distribution in the energy storage system 200 and ignoring the natural heat dissipation capacity of the energy storage inverter group 210 and the battery pack group 220, temperature sensors can be used to collect the ambient temperatures of the energy storage inverter group side and the battery pack group side respectively. Since the temperature control demand on the side with higher ambient temperature is greater, the side with higher ambient temperature can be determined as the target side.

[0091] Implementation method three: In scenario one, taking into account the temperature distribution in the energy storage system 200 and the natural heat dissipation capabilities of the energy storage inverter group 210 and the battery pack group 220, the side with higher ambient temperature and / or poorer natural heat dissipation capability can be determined as the target side.

[0092] Scenario 2: The thermal management system 100 includes a plurality of shared cooling modules 110;

[0093] In this scenario, the triggering state (triggered or not triggered) and the target side of each shared cooling module 110 can be comprehensively determined based on the ambient temperature, the maximum cooling capacity that each shared cooling module 110 can provide, and the power consumption of each shared cooling module 110. The overall constraint rules are as follows:

[0094] (1) The target side is that the total cooling capacity provided by the shared cooling module 110 on the energy storage converter group side can meet the temperature control requirements of the energy storage converter group side;

[0095] (2) The target side is that the total cooling capacity provided by the shared cooling module 110 on the battery pack side can meet the temperature control requirements of the battery pack side;

[0096] It is understandable that, when considering the natural heat dissipation capacity of the components, the temperature control requirements of each side can be comprehensively determined based on the ambient temperature and the natural heat dissipation capacity of the components.

[0097] (3) The total power consumption of the thermal management system 100 is the lowest.

[0098] It can be understood that the cell heating power and the operating time of the battery pack 220 in the above step S330 can be used to reflect the heat generated by the battery pack 220. Since the cell heating power and the operating time of the battery pack 220 can be used in multiple ways to reflect the heat generated by the battery pack 220, there are multiple implementations of step S330 to determine the target side of the shared cooling module 110. Two optional implementations of step S330 are introduced below:

[0099] Implementation method 1: Step S330 may calculate the average value of the heating power of the battery cells within the fixed time interval at every fixed time interval, so as to reflect the heat generated by the battery pack 220 within the fixed time interval, and then determine the temperature control requirements of each side based on the ambient temperature and the heat generated by the battery pack 220, thereby determining the target side of the shared cooling module 110 based on the temperature control requirements;

[0100] Embodiment 2: The heating power of the battery cell is pre-divided into zones, and the heat generated by the battery pack 220 is determined by determining the target zone to which the heating power of the battery cell belongs and the duration of the battery pack 220 in the power zone. In this case, the solution of step S330 can be:

[0101] As an optional implementation of the thermal management method, the step S330 includes: determining the target power partition to which the heating power of the battery cell belongs and the continuous power operation time of the battery pack group 220 in the target power partition; determining the target side of each shared cooling module based on the ambient temperature, the target power partition and the continuous power operation time. This implementation, for example, reflects the heat generated by the battery pack group 220 based on the target power partition and the continuous power operation time of the battery pack group 220 in the target power partition. For example, when the battery pack group 220 continuously operates for a long time in a larger target power partition, the heat generated by the battery pack group 220 is relatively large. If the ambient temperature of the energy storage inverter group side is the same as that of the battery pack group side, the temperature control demand on the battery pack group side is relatively large.

[0102] The above scheme jointly determines the target side of the shared cooling module 110 based on the ambient temperature, target power partition and power operation time, so that the shared cooling module 110 can be allocated according to the temperature control requirements. On the one hand, it is beneficial to improve the energy efficiency of the thermal management system 100; on the other hand, by comprehensively considering factors such as ambient temperature, target power partition and power operation time, the shared cooling module 110 can be reasonably allocated, which is beneficial to reducing the energy waste of the above thermal management system 100.

[0103] As an optional implementation of the above-mentioned thermal management method, the above-mentioned step S330 determines the target side of each shared cooling module 110 based on the ambient temperature, the target power partition and the continuous power operation time, including: based on the ambient temperature, the target power partition and the continuous power operation time, using the first mapping relationship to determine the target side of each shared cooling module 110; wherein the first mapping relationship is used to characterize the correspondence between the ambient temperature, the target power partition and the continuous power operation time and the target side of the shared cooling module 110.

[0104] Exemplarily, the first mapping relationship can determine multiple thresholds of ambient temperature, power partition, and continuous power operation time based on empirical values, and then construct the first mapping relationship based on multiple thresholds. In addition, the first mapping relationship can also be learned based on a machine learning model, with ambient temperature, target power partition, and continuous power operation time as model inputs, and the target side of the shared cooling module as output, to train the machine learning model, so as to obtain the first mapping relationship. Of course, if a machine learning model is used to learn the first mapping relationship, the above step S330 can directly input the ambient temperature, power partition, and continuous power operation time into the trained machine learning model, so as to obtain the target side of each shared cooling module 110 output by the machine learning model.

[0105] The above scheme can use the predetermined first mapping relationship, ambient temperature, power partition and power continuous operation time to quickly determine the target side of each shared cooling module, which is conducive to improving the thermal management efficiency of the above thermal management method.

[0106] As an optional implementation of the above-mentioned thermal management method, the above-mentioned step S330 determines the target side of each shared cooling module 110 based on the ambient temperature, the target power partition and the continuous power operation time, including: determining the target side of each shared cooling module 110 based on the ambient temperature, the heating power of the battery cell, the operating time of the battery pack group and the power consumption of each shared cooling module 110.

[0107] It can be understood that the above scheme can also determine the target side of each shared cooling module 110 based on the mapping relationship, by adding the power consumption of the shared cooling module 110 in the above first mapping relationship, that is: in the above scheme, the first mapping relationship can also be used to characterize the correspondence between the ambient temperature, target power partition, continuous power operation time and the power consumption of the shared cooling module 110 and the target side of the shared cooling module 110.

[0108] In addition, it can be understood that step S330 can determine the target side of each shared cooling module 110 by taking the overall operating power consumption of the thermal management system 100 as a constraint.

[0109] The above scheme comprehensively considers the target side of each shared cooling module 110 by integrating the ambient temperature, the heating power of the battery cells, the operating time of the battery pack group 220 and the power consumption of each shared cooling module 110, which is beneficial to improving the energy efficiency of the above thermal management system 100.

[0110] The above scheme introduces the architecture of the thermal management system 100 including the shared cooling module 110 and the specific implementation of the thermal management method applied in the architecture. The following is a detailed introduction to the thermal management system 100 of another architecture and the thermal management method applied in the architecture:

[0111] See also Figure 3 As an optional implementation of the thermal management system, the thermal management system 100 may further include: a first dedicated cooling module 150 disposed on the energy storage converter group side and a second dedicated cooling module 160 disposed on the battery pack group side; the first dedicated cooling module 150 and the second dedicated cooling module 160 are electrically connected to the processing module 140 respectively;

[0112] The processing module 140 is also used to determine the target side of each shared cooling module 110, the trigger state of the first dedicated cooling module 150, and the trigger state of the second dedicated cooling module 160 based on the ambient temperature, the heat generation power of the battery cells, the operating time of the battery pack 220, the power consumption of the shared cooling module 110, the power consumption of the first dedicated cooling module 150, and the power consumption of the second dedicated cooling module 160.

[0113] It can be understood that the "first" referred to in the first dedicated cooling module 150 and the "second" referred to in the second dedicated cooling module 160 do not refer to the number of dedicated cooling modules, but to the distinction between dedicated cooling modules arranged on different sides. The first dedicated cooling module 150 may include one or more cooling modules, and the second dedicated cooling module 160 may also include one or more cooling modules.

[0114] It is understandable that the processing module 140 may use the lowest overall operating power consumption of the thermal management system as a constraint to determine the target side of each shared cooling module 110 , the triggering state of the first dedicated cooling module 150 , and the triggering state of the second dedicated cooling module 160 .

[0115] Exemplarily, the first dedicated cooling module 150 and the second cooling module 160 may adopt cooling modules such as an air cooling module, a liquid cooling module, and a compressor refrigeration module, and a specific cooling module may be selected based on a specific application scenario.

[0116] It can be understood that the above-mentioned first dedicated cooling module 150 is connected to the cold circulation loop on the PCS side, and the second dedicated cooling module 160 is connected to the cold circulation loop on the PACK side. Electric valves can be respectively set in the first dedicated cooling module 150 and the second dedicated cooling module 160, and the electric valves are electrically connected to the processing module 140, so that the processing module 140 can control the triggering state of the first dedicated cooling module 150 and the second dedicated cooling module by controlling the opening and closing of the electric valves.

[0117] Optionally, the first dedicated cooling module 150 includes: a liquid cooling unit that utilizes cooling liquid circulation to dissipate heat from the energy storage converter group 210 .

[0118] Optionally, the second dedicated cooling module 160 includes: a compressor refrigeration unit that utilizes compressor refrigeration to dissipate heat from the battery pack group 220 .

[0119] The following is an introduction to the thermal management method of the processing module 140 in the architecture of the thermal management system 100:

[0120] As an optional implementation of the above thermal management method, the thermal management system 100 further includes a first dedicated cooling module 150 disposed on the energy storage converter group side and a second dedicated cooling module 160 disposed on the battery pack group side. The above step S330 includes:

[0121] Based on the ambient temperature, the heat generation power of the battery cells, the operating time of the battery pack 220, the power consumption of the shared cooling module 110, the power consumption of the first dedicated cooling module 150 and the power consumption of the second dedicated cooling module 160, the target side of each shared cooling module 110, the triggering state of the first dedicated cooling module 150 and the triggering state of the second dedicated cooling module 160 are determined.

[0122] It is understandable that the above step S330 can use the lowest overall operating power consumption of the thermal management system 100 as a constraint to determine the target side of each shared cooling module 110, the trigger state of the first dedicated cooling module 150 and the trigger state of the second dedicated cooling module 160.

[0123] It can be understood that when determining the target side of the shared cooling module 110, the triggering state of the first dedicated cooling module 150, and the triggering state of the second dedicated cooling module 160, the overall constraint rules are as follows:

[0124] (1) The target side is that the sum of the cooling capacity provided by the shared cooling module 110 on the energy storage converter group side and the cooling capacity provided by the first dedicated cooling module 150 when in the triggered state can meet the temperature control requirement of the energy storage converter group side;

[0125] (2) The target side is that the sum of the cooling capacity provided by the shared cooling module 110 on the battery pack side and the cooling capacity provided by the second dedicated cooling module 160 when in the triggered state can meet the temperature control requirements of the battery pack side;

[0126] (3) The total power consumption of the thermal management system 100 is the lowest.

[0127] It is understandable that empirical values ​​can be used to comprehensively determine the target side of each shared cooling module 110, the trigger state of the first dedicated cooling module 150, and the trigger state of the second dedicated cooling module 160 based on the ambient temperature, the heating power of the battery cell, the operating time of the battery pack group 220, the power consumption of the shared cooling module 110, the power consumption of the first dedicated cooling module 150, and the power consumption of the second dedicated cooling module 160. Of course, a machine learning model, such as a deep neural network model, can also be used to learn the relationship between the ambient temperature, the heating power of the battery cell, the operating time of the battery pack group 220, the power consumption of the shared cooling module 110, the power consumption of the first dedicated cooling module 150, and the power consumption of the second dedicated cooling module 160, and the target side of each shared cooling module 110, the trigger state of the first dedicated cooling module 150, and the trigger state of the second dedicated cooling module 160.

[0128] During the implementation of the above scheme, the working state of the thermal management system 100 can be comprehensively determined based on the ambient temperature, the heating power of the battery cells, the operating time of the battery pack 220, the power consumption of the shared cooling module 110, the power consumption of the first dedicated cooling module 150 and the power consumption of the second dedicated cooling module 160. On the one hand, it is beneficial to improve the energy efficiency of the above thermal management system 100; on the other hand, the above scheme can flexibly adjust the working state of the thermal management system 100, which is beneficial to improve the thermal management flexibility of the above thermal management system 100.

[0129] As an optional implementation of the above-mentioned thermal management method, the above-mentioned step S330 determines the target side of each shared cooling module 110, the trigger state of the first dedicated cooling module 150, and the trigger state of the second dedicated cooling module 160 based on the ambient temperature, the heating power of the battery cell, the operating time of the battery pack group 220, the power consumption of the shared cooling module 110, the power consumption of the first dedicated cooling module 150, and the power consumption of the second dedicated cooling module 160, including:

[0130] Based on the ambient temperature, the heating power of the battery cells, the operating time of the battery pack 220, the power consumption of the shared cooling module 110, the power consumption of the first dedicated cooling module 150, and the power consumption of the second dedicated cooling module 160, the target side of each shared cooling module 110, the trigger state of the first dedicated cooling module 150, and the trigger state of the second dedicated cooling module 160 are determined by using the second mapping relationship;

[0131] Among them, the second mapping relationship is used to characterize the correspondence between the ambient temperature, the heating power of the battery cells, the operating time of the battery pack 220, the power consumption of the shared cooling module 110, the power consumption of the first dedicated cooling module 150, and the power consumption of the second dedicated cooling module 160 and the target side of each shared cooling module 110, the trigger state of the first dedicated cooling module 150, and the trigger state of the second dedicated cooling module 160 under the constraint of the lowest overall operating power consumption of the thermal management system 100.

[0132] Exemplarily, the second mapping relationship can determine multiple thresholds of ambient temperature, cell heating power, battery pack 220 operation time, shared cooling module 110 power consumption, first dedicated cooling module 150 power consumption, and second dedicated cooling module 160 based on empirical values, and then construct the second mapping relationship based on multiple thresholds. In addition, the second mapping relationship can also be learned based on a machine learning model, with ambient temperature, cell heating power, battery pack 220 operation time, shared cooling module 110 power consumption, first dedicated cooling module 150 power consumption, and second dedicated cooling module 160 power consumption as input, and the target side of each shared cooling module 110, the trigger state of the first dedicated cooling module 150, and the trigger state of the second dedicated cooling module 160 as output, to train the machine learning model, so as to obtain the second mapping relationship. Of course, if a machine learning model is used to learn the second mapping relationship, the above step S330 can directly use the trained machine learning model to obtain the target side of each shared cooling module 110, the trigger state of the first dedicated cooling module 150, and the trigger state of the second dedicated cooling module 160.

[0133] The above scheme can utilize a predetermined second mapping relationship to quickly determine the target side of each shared cooling module 110, the trigger state of the first dedicated cooling module 150, and the trigger state of the second dedicated cooling module 160 based on the ambient temperature, the heat generation power of the battery cells, the operating time of the battery pack 220, the power consumption of the shared cooling module 110, the power consumption of the first dedicated cooling module 150, and the power consumption of the second dedicated cooling module 160, which is beneficial to improving the thermal management efficiency of the management method.

[0134] As an optional implementation of the thermal management method, the method further includes: when the operating time of the battery pack group is not greater than a preset time threshold, determining the target side of each shared cooling module 110 based on the ambient temperature.

[0135] The above step S330 includes: when the operating time of the battery pack group 220 is greater than the preset time threshold and the heating power of the battery cell is greater than the preset power threshold, determining the target side of each shared cooling module based on the ambient temperature, the heating power of the battery cell and the operating time of the battery pack group.

[0136] It is understandable that at the initial start-up of the energy storage system 200, the thermal states of the energy storage inverter group 210 and the battery pack group 220 are usually relatively close to the ambient temperature. Therefore, the temperature control requirements at this time are mainly affected by the ambient temperature. Therefore, the above step S330 can be performed when the operating time of the battery pack group 220 is greater than the preset time threshold, for example, greater than 15 minutes, and then the ambient temperature, the heating power of the battery cells and the operating time of the battery pack group are comprehensively considered to determine the target side of each shared cooling module.

[0137] In the implementation process of the above scheme, at the initial start-up of the energy storage system 200, the target side of the shared cooling module 110 is determined only based on the ambient temperature. On the one hand, the above thermal management method can quickly respond to changes in ambient temperature, which is beneficial to improving the response speed of the above thermal management system 100; on the other hand, at the initial start-up of the energy storage system 200, the ambient temperature is used as the main control parameter, which can reduce energy waste and is beneficial to improving the overall energy consumption of the above thermal management system 100.

[0138] The following is an introduction to other functions that can be achieved by the thermal management system 100:

[0139] 1. Dehumidification function:

[0140] As an optional implementation of the thermal management system 100, the thermal management system 100 further includes: a dehumidification module 170;

[0141] The processing module 140 is further used to: obtain the ambient humidity of the energy storage system 200; when the ambient humidity is greater than a humidity threshold, turn on the dehumidification module to reduce the ambient humidity to a humidity value not greater than the humidity threshold.

[0142] Exemplarily, the thermal management system 100 may be provided with a humidity sensor for collecting ambient humidity in the energy storage system 200 , and the processing module 140 may obtain the ambient humidity of the energy storage system 200 through the humidity sensor.

[0143] As an optional implementation of the above-mentioned thermal management method, the thermal management system 100 also includes a dehumidification module 170, and the above-mentioned thermal management method also includes: obtaining the ambient humidity of the energy storage system 200; when the ambient humidity is greater than the humidity threshold, turning on the dehumidification module 170 to reduce the ambient humidity to a humidity value not greater than the humidity threshold.

[0144] The above scheme monitors the ambient humidity of the energy storage system 200 and turns on the dehumidification module 170 when the ambient humidity is greater than the humidity threshold, thereby dehumidifying the energy storage system 200. The dehumidification function is beneficial to maintaining the internal humidity of the system at an appropriate level, thereby improving the safety of the energy storage system 200.

[0145] 2. Heating function:

[0146] As an optional implementation of the thermal management system 100, the thermal management system 100 further includes: a heating module 180;

[0147] The processing module 140 is also used to: when the energy storage system 200 is started, obtain the ambient temperature of the energy storage system 200, the cell temperature of the battery pack 220, and the start-up mode of the battery pack; if the ambient temperature, the cell temperature, and the start-up mode meet the preset heating conditions, turn on the heating module 180. For example, in this embodiment, when the energy storage system 200 is started, obtain the ambient temperature of the energy storage system 200, the cell temperature of the battery pack 220, and the start-up mode of the battery pack 220; if the battery pack 220 is started statically in a low temperature environment and the cell temperature is not greater than 10°C, turn on the heating module 180.

[0148] Exemplarily, the processing module 140 may obtain the start / stop timestamp of the battery pack 220 through the battery management system BMS, and thereby determine whether the battery pack 220 is started from a standstill according to the start / stop timestamp.

[0149] Exemplarily, the heating module 180 may adopt a PTC heating module, a resistance heating module, an infrared heating module, an electromagnetic heating module or other types of heating modules. The heating type may be selected according to the specific application scenario, which will not be described in detail in the embodiments of the present application.

[0150] In the process of implementing the above scheme, the heating module 180 is controlled to heat the battery pack 220. On the one hand, it enables the battery pack 220 to operate within a better temperature range, which is beneficial to improving the reliability of the energy storage system 200; on the other hand, it enables the energy storage system 200 to be applied to more application scenarios, which is beneficial to improving the adaptability of the energy storage system 200.

[0151] The following provides a specific application scenario to introduce the working principle of the above thermal management method and thermal management system 100 in detail:

[0152] See also Figure 3 In this application scenario, the thermal management system 100 includes:

[0153] A shared cooling module 110, the cooling module includes a first natural radiator 111 and a first cooling fan 112, the coolant can flow through the first natural radiator 111 to dissipate heat, and the first cooling fan 112 can be used to assist the first natural radiator 11 in dissipating heat;

[0154] A first dedicated cooling module 150 dedicated to dissipating heat on the energy storage converter group side, the module also includes a second natural radiator 151 and a second cooling fan 152, the coolant can flow through the second natural radiator 151 to dissipate heat, and the second cooling fan 152 can be used to assist the second natural radiator 151 in dissipating heat;

[0155] A second dedicated cooling module 160 for dissipating heat on the battery pack side, comprising: a compressor 161, an air-cooled condenser 162, a cooling fan 163, a plate heat exchanger 164 and an electronic expansion valve 165, wherein the output end of the compressor 161 is connected to the input end of the air-cooled condenser 162, the output end of the air-cooled condenser 162 is connected to the electronic expansion valve 165, the other end of the electronic expansion valve 165 is connected to the plate heat exchanger 164, and the other end of the plate heat exchanger 164 is connected to the input end of the compressor 161;

[0156] A dehumidification module 170 installed on the battery pack side, including a dehumidification radiator 171, a dehumidification fan 172 and a dehumidification electric valve 173;

[0157] A heating module 180 installed on the battery pack side includes a PTC heating module 181.

[0158] It is understandable that the above-mentioned PTC heating module 181 can cooperate with the plate heat exchanger 164 in the second dedicated cooling module 160 to perform heating, and the plate heat exchanger 164 can increase the heat exchange area, thereby transferring heat more effectively;

[0159] In addition to the above modules, the thermal management system 100 also includes:

[0160] A first electronic water pump 191 is installed in the cold circulation loop on the PCS side and is used to realize the flow of coolant in the cold circulation loop on the PCS side;

[0161] The first electric two-way ball valve 192 and the second electric two-way ball valve 193 are used to control whether the shared cooling module 110 is connected to the cold circulation loop on the PCS side. When the first electric two-way ball valve 192 and the second electric two-way ball valve 193 are both connected, the shared cooling module 110 is connected to the cold circulation loop on the PCS side;

[0162] The second electronic water pump 194 is installed in the cold circulation loop on the PACK side and is used to realize the flow of the coolant in the cold circulation loop on the PACK side;

[0163] The electric three-way regulating valve 195 is installed in the cold circulation loop on the PACK side, with its input end connected to the output end of the electronic water pump 194, one output end connected to the shared cooling module 110, and the other output point connected to the PTC heating module 181;

[0164] A first temperature sensor 196 and a first pressure sensor 197 installed at the outlet of the plate heat exchanger 164 and a second temperature sensor 198 and a second pressure sensor 199 installed at the outlet of the compressor are used to monitor the power consumption of the compressor during refrigeration;

[0165] The third electric two-way ball valve 1910 installed at the inlet of the plate heat exchanger is used to control whether the shared cooling module 110 is connected to the PACK side cold circulation loop.

[0166] First, the six working modes of the thermal management system 100 are introduced:

[0167] Working mode 1 (Model 1): Both the energy storage inverter group side and the battery pack group side are cooled by natural heat dissipation. The operating status is as follows:

[0168] (1) On the energy storage converter group side: the first electric two-way ball valve 192 and the second electric two-way ball valve 193 are powered off and closed, and the second natural radiator 151 provides cooling to meet the heat dissipation requirements on the PCS side;

[0169] It is understandable that the internal temperature of the energy storage converter group 210 can be monitored. If the internal temperature of the energy storage converter group 210 is greater than the set value, , the second cooling fan 152 is turned on, and the internal temperature of the energy storage converter group 210 is not greater than the set value When, only the second natural heat sink 151 can be used for heat dissipation;

[0170] At this time, the energy storage converter group side uses the first dedicated cooling module 150 for heat dissipation.

[0171] (2) Battery pack side: The electric three-way regulating valve 195 is activated, and 100% of the coolant flows to the first natural radiator 111. The third electric two-way ball valve 1910 is powered on and opened, and the first natural radiator 111 and the first cooling fan 112 provide cooling capacity.

[0172] At this time, the battery pack group side uses the shared cooling module 110 for heat dissipation, that is, the target side of the shared cooling module 110 is the battery pack group side.

[0173] Working mode 2 (Model 2): ​​The energy storage inverter group side performs natural heat dissipation cooling, and the battery pack group side performs natural heat dissipation cooling and compressor refrigeration cooling. The operating status is as follows:

[0174] (1) On the energy storage converter group side: the first electric two-way ball valve 192 and the second electric two-way ball valve 193 are powered off and closed, and the second natural radiator 151 and the second cooling fan 152 provide cooling;

[0175] At this time, the energy storage converter group side uses the first dedicated cooling module 150 for heat dissipation.

[0176] (2) Battery pack side: The electric three-way regulating valve 195 is activated, part of the coolant flows to the first natural radiator 111, and the other part flows to the plate heat exchanger 164. The third electric two-way ball valve 1910 is energized and opened, and the first natural radiator 111 and the plate heat exchanger 164 provide cooling capacity at the same time;

[0177] In this working mode, the first natural heat sink 111 is prioritized to work at full load, and the insufficient cooling capacity is compensated by the compressor cooling;

[0178] In addition, the power consumption of the compressor during cooling can be monitored by the first temperature sensor 196, the first pressure sensor 197, the second temperature sensor 198, and the second pressure sensor 199;

[0179] At this time, the battery pack side uses the shared cooling module 110 and the second dedicated cooling module 160 to dissipate heat, and the target side of the shared cooling module 110 is the battery pack side.

[0180] Working mode 3 (Model 3): The energy storage inverter group side performs natural heat dissipation cooling, and the battery pack group side performs compressor refrigeration cooling. The operating status is as follows:

[0181] (1) On the energy storage converter group side: the first electric two-way ball valve 192 and the second electric two-way ball valve 193 are powered off and closed, and the second natural radiator 151 and the second cooling fan 152 provide cooling;

[0182] At this time, the energy storage converter group side uses the first dedicated cooling module 150 for heat dissipation.

[0183] (2) Battery pack side: The electric three-way regulating valve 195 is activated, and 100% of the coolant flows to the plate heat exchanger 164. The third electric two-way ball valve 1910 is powered off and closed, and the compressor refrigeration is used to provide cooling capacity;

[0184] In addition, the power consumption of the compressor during cooling can be monitored by the first temperature sensor 196, the first pressure sensor 197, the second temperature sensor 198, and the second pressure sensor 199;

[0185] At this time, the battery pack side uses the second dedicated cooling module 160 to dissipate heat.

[0186] Working mode 4 (Model 4): The energy storage inverter group side performs natural heat dissipation cooling, and the battery pack group side performs compressor refrigeration cooling. The operating status is as follows:

[0187] (1) On the energy storage converter group side: the first electric two-way ball valve 192 and the second electric two-way ball valve 193 are powered on and opened, and the second natural radiator 151, the second cooling fan 152, the first natural radiator 111 and the first cooling fan 112 jointly provide cooling capacity;

[0188] At this time, the energy storage converter group side uses the first dedicated cooling module 150 and the shared cooling module 110 to jointly dissipate heat, and the target side of the shared cooling module 110 is the energy storage converter group side.

[0189] (2) Battery pack side: The electric three-way regulating valve 195 is activated, and 100% of the coolant flows to the plate heat exchanger 164. The third electric two-way ball valve 1910 is powered off and closed, and the compressor refrigeration is used to provide cooling capacity;

[0190] In addition, the power consumption of the compressor during cooling can be monitored by the first temperature sensor 196, the first pressure sensor 197, the second temperature sensor 198, and the second pressure sensor 199;

[0191] At this time, the battery pack side uses the second dedicated cooling module 160 to dissipate heat.

[0192] Working mode 5 (dehumidification mode):

[0193] The humidity of the compartment where the battery pack is located is monitored. When the humidity is greater than the preset humidity threshold, the dehumidification electric valve 173 and the dehumidification fan 172 are opened, and the return air flows through the dehumidification radiator 171 to complete the dehumidification, and the air is supplied to the compartment where the battery pack is located, forming an air flow circulation in the compartment where the battery pack is located to achieve the dehumidification effect.

[0194] This function directly utilizes the low-temperature coolant on the battery pack side for dehumidification, eliminating the traditional compressor dehumidification module, making the above-mentioned thermal management system 100 more economical and efficient.

[0195] Working mode six (heating mode):

[0196] If the battery pack 220 is started statically in a low temperature environment and the cell temperature is not greater than 10° C., the PTC heating module 181 and the second electronic water pump 194 are turned on.

[0197] See also Figure 5 , the operation logic of the thermal management method applied to the thermal management system 100 is introduced below:

[0198] (1) When the energy storage system 200 is turned on and running for When the temperature is low, the corresponding working mode is selected based on the ambient temperature;

[0199] The specific solution for selecting the corresponding working mode based on the ambient temperature is:

[0200] When , the above Model 1 is adopted;

[0201] When , the above Model 2 is adopted;

[0202] When , the above Model 3 is adopted;

[0203] When the above Model 4 is used.

[0204] (2) When the energy storage system 200 is turned on and running for When selecting the working mode, consider the ambient temperature and the heating power of the battery cell:

[0205] When the battery core heats up, the power When the temperature is low, the corresponding working mode is selected based on the ambient temperature;

[0206] When the battery core heats up, the power hour:

[0207] 1. Ambient temperature When the battery pack is Duration of power within range To select the working mode:

[0208] When the temperature is low, the corresponding working mode is selected based on the ambient temperature;

[0209] When , the working mode is directly determined as the above Model 2;

[0210] 2. Ambient temperature When the battery pack is Duration of power within range To select the working mode:

[0211] When , the working mode is directly determined as the above Model 2;

[0212] When the operating mode is directly determined as the above Model 3.

[0213] When the battery core heats up, the power hour:

[0214] 1. Ambient temperature When the battery pack is Duration of power within range To select the working mode:

[0215] When the temperature is low, the corresponding working mode is selected based on the ambient temperature;

[0216] When , the working mode is directly determined as the above Model 2;

[0217] When , the working mode is directly determined as the above Model 3;

[0218] 2. Ambient temperature When the battery pack is Duration of power within range To select the working mode:

[0219] When , the working mode is directly determined as the above Model 3;

[0220] When the operating mode is directly determined as the above Model 4.

[0221] Based on the same inventive concept, an energy storage system 200 is also provided in an embodiment of the present application. The energy storage system 200 includes an energy storage inverter group 210, a battery pack group 220 and a thermal management system 100, wherein the thermal management system 100 is any of the thermal management systems 100 described above.

[0222] It is understandable that the thermal management system 100 may also include a memory and a communication interface, wherein the memory includes one or more (only one is shown in the figure), which may be, but not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc. The processing module 140 and other possible components may access the memory, read and / or write data therein.

[0223] The processing module 140 includes one or more (only one is shown in the figure), which can be an integrated circuit chip with signal processing capabilities. The above-mentioned processing module 140 can be a general-purpose processor, including a central processing unit (CPU), a micro control unit (MCU), a network processor (NP) or other conventional processors; it can also be a special-purpose processor, including a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, and discrete hardware components.

[0224] The communication interface includes one or more (only one is shown in the figure), which can be used to communicate directly or indirectly with other devices to exchange data. For example, the communication interface can be an Ethernet interface; it can be a mobile communication network interface, such as an interface of a 3G, 4G, or 5G network; or it can be other types of interfaces with data transceiving functions.

[0225] One or more computer program instructions may be stored in the memory, and the processing module 140 may read and execute these computer program instructions to implement the thermal management method and other desired functions provided in the embodiments of the present application.

[0226] The embodiment of the present application also provides a computer-readable storage medium, on which computer program instructions are stored. When the computer program instructions are read and executed by a processor of a computer, the thermal management method provided in the embodiment of the present application is executed.

[0227] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0228] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0229] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0230] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0231] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0232] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0233] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0234] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A thermal management method, characterized in that: Applied to a thermal management system, the thermal management system includes one or more shared cooling modules shared between an energy storage converter group side and a battery pack group side in an energy storage system, the method includes: Obtaining the ambient temperature of the energy storage system and the heating power of the battery cells of the battery pack; When the heating power of the battery cell is not greater than the preset power threshold, the target side of each shared cooling module is determined based on the ambient temperature; wherein the target side is the side with a greater temperature control demand between the energy storage inverter group side and the battery pack group side; When the heating power of the battery cell is greater than the preset power threshold, determining the target side of each of the shared cooling modules based on the ambient temperature, the heating power of the battery cell and the operating time of the battery pack group; Connecting the shared cooling module to the target cold circulation loop of the target side so that the shared cooling module dissipates heat for the target side; The determining the target side of each shared cooling module based on the ambient temperature, the heating power of the battery cell and the operating time of the battery pack group includes: Determine the target power partition to which the heating power of the battery cell belongs and the power continuous operation time of the battery pack group in the target power partition; Determining a target side of each of the shared cooling modules based on the ambient temperature, the target power partition, and the power continuous operation time; The determining the target side of each of the shared cooling modules based on the ambient temperature, the target power partition, and the power continuous operation time includes: Based on the ambient temperature, the target power partition and the continuous power operation time, the target side of each shared cooling module is determined using a first mapping relationship; wherein the first mapping relationship is used to characterize the correspondence between the ambient temperature, the target power partition and the continuous power operation time and the target side of the shared cooling module.

2. The thermal management method according to claim 1, characterized in that: The determining the target side of each shared cooling module based on the ambient temperature, the heating power of the battery cell and the operating time of the battery pack group includes: The target side of each shared cooling module is determined based on the ambient temperature, the heating power of the battery cell, the operating time of the battery pack group, and the power consumption of each shared cooling module.

3. The thermal management method according to claim 1, characterized in that: The thermal management system further includes a first dedicated cooling module disposed on the energy storage converter group side and a second dedicated cooling module disposed on the battery pack group side, and the target side of each shared cooling module is determined based on the ambient temperature, the heating power of the battery cell and the operating time of the battery pack group, including: Based on the ambient temperature, the heat generation power of the battery cells, the operating time of the battery pack group, the power consumption of the shared cooling module, the power consumption of the first dedicated cooling module, and the power consumption of the second dedicated cooling module, the target side of each shared cooling module, the triggering state of the first dedicated cooling module, and the triggering state of the second dedicated cooling module are determined.

4. The thermal management method according to claim 3, characterized in that: The determining, based on the ambient temperature, the heating power of the battery cell, the operating time of the battery pack group, the power consumption of the shared cooling module, the power consumption of the first dedicated cooling module, and the power consumption of the second dedicated cooling module, the target side of each shared cooling module, the triggering state of the first dedicated cooling module, and the triggering state of the second dedicated cooling module includes: Based on the ambient temperature, the heating power of the battery cell, the operating time of the battery pack group, the power consumption of the shared cooling module, the power consumption of the first dedicated cooling module, and the power consumption of the second dedicated cooling module, a second mapping relationship is used to determine the target side of each of the shared cooling modules, the triggering state of the first dedicated cooling module, and the triggering state of the second dedicated cooling module; Among them, the second mapping relationship is used to characterize the correspondence between the ambient temperature, the heating power of the battery cell, the operating time of the battery pack group, the power consumption of the shared cooling module, the power consumption of the first dedicated cooling module, and the power consumption of the second dedicated cooling module and the target side of each shared cooling module, the trigger state of the first dedicated cooling module, and the trigger state of the second dedicated cooling module under the constraint of the lowest overall operating power consumption of the thermal management system.

5. The thermal management method according to any one of claims 1 to 4, characterized in that: The thermal management system further includes a dehumidification module, and the method further includes: Obtaining the ambient humidity of the energy storage system; When the ambient humidity is greater than a humidity threshold, the dehumidification module is turned on to reduce the ambient humidity to a humidity value not greater than the humidity threshold.

6. The thermal management method according to any one of claims 1 to 4, characterized in that: The thermal management system further includes a heating module, and the method further includes: When the energy storage system is started, obtaining the ambient temperature of the energy storage system, the cell temperature of the battery pack group, and the starting mode of the battery pack group; If the ambient temperature, the battery cell temperature and the startup mode meet the preset heating conditions, the heating module is turned on.

7. The thermal management method according to any one of claims 1 to 4, characterized in that: The method further comprises: When the operating time of the battery pack group is not greater than a preset time threshold, determining the target side of each of the shared cooling modules based on the ambient temperature; When the heating power of the battery cell is greater than a preset power threshold, determining the target side of each shared cooling module based on the ambient temperature, the heating power of the battery cell and the operating time of the battery pack group includes: When the operating time of the battery pack group is greater than the preset time threshold and the heating power of the battery cell is greater than the preset power threshold, the target side of each shared cooling module is determined based on the ambient temperature, the heating power of the battery cell and the operating time of the battery pack group.

8. An energy storage system, characterized in that: The energy storage system includes: an energy storage inverter group, a battery pack group and a thermal management system, wherein the thermal management system includes a processing module, and the processing module is used to execute the thermal management method according to any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a computer, the computer is caused to perform the method according to any one of claims 1 to 7.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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