Thermal management method, energy storage system, storage medium, and program product

Abstract

The present application provides a thermal management method, an energy storage system, a storage medium, and a program product. The thermal management method comprises: acquiring an ambient temperature of the energy storage system and a cell heating power of a battery pack group; when the cell heating power is not greater than a preset power threshold, determining a target side for each shared cooling module on the basis of the ambient temperature; when the cell heating power is greater than the preset power threshold, determining a target side for each shared cooling module on the basis of the ambient temperature, the cell heating power, and an operation duration of the battery pack group; and connecting each shared cooling module into a target cooling circulation loop of the target side, so that the shared cooling module dissipates heat from the target side. The solution above enables the thermal management system to adjust a cooling strategy on the basis of the ambient temperature, the cell heating power, and the operation duration of the battery pack group, thereby improving the flexibility and adaptability of thermal management.

Description

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

[0001] This application relates to the field of energy storage technology, and more specifically, to a thermal management method, an energy storage system, a storage medium, and a program product. Background Technology

[0002] Containerized Energy Storage System (CESS) is a highly integrated energy storage solution that integrates key components such as battery packs, power converter (PCS) arrays, battery management systems (BMS), and energy management systems (EMS) within a container. Since the operating conditions of the PCS and PCS arrays are dependent on the ambient temperature, containerized energy storage systems also include a thermal management system for thermal management of these components. This thermal management system ensures that the PCS and PCS arrays operate within their optimal temperature range.

[0003] Currently, most thermal management systems in related technologies manage the battery pack and the energy storage converter separately. The thermal management systems on the battery pack side and the energy storage converter side are independent, resulting in poor flexibility in the thermal management of the energy storage system. Summary of the Invention

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

[0005] In a first aspect, embodiments of this application provide a thermal management method applied to a thermal management system, the thermal management system including one or more shared cooling modules shared between the energy storage converter group side and the battery pack group side in an energy storage system, the method including:

[0006] The ambient temperature of the energy storage system and the cell heating power of the battery pack are obtained.

[0007] When the heat generation power of the battery cell is not greater than a preset power threshold, the target side of each of the shared cooling modules is determined based on the ambient temperature; wherein, the target side is the side with greater temperature control requirements between the energy storage converter group side and the battery pack group side.

[0008] When the heat generation power of the battery cell is greater than the preset power threshold, the target side of each of the shared cooling modules is determined based on the ambient temperature, the heat generation power of the battery cell, and the operating time of the battery pack.

[0009] The shared cooling module is connected to the target cold circulation loop on the target side so that the shared cooling module can dissipate heat from the target side.

[0010] In the implementation of the above scheme, the target side of the shared cooling module is determined by comprehensively considering the cell heating power, ambient temperature and battery pack operating time. On the one hand, this enables the thermal management system to adjust the cooling strategy based on the ambient temperature, cell heating power and battery pack operating time, 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 by flexibly allocating the shared cooling module, which is beneficial to improving the energy efficiency of the thermal management system and reducing thermal management energy consumption.

[0011] In one implementation of the first aspect, determining the target side of each of the shared cooling modules based on the ambient temperature, the cell heating power, and the battery pack operating time includes: determining the target power zone to which the cell heating power belongs and the continuous power operating time of the battery pack within the target power zone; and determining the target side of each of the shared cooling modules based on the ambient temperature, the target power zone, and the continuous power operating time.

[0012] In the implementation of the above scheme, the target side of the shared cooling module is determined based on the ambient temperature, target power zoning, and power operating time. This allows the shared cooling module to be allocated according to temperature control requirements. On the one hand, this is beneficial to improving the energy efficiency of the thermal management system. On the other hand, by comprehensively considering factors such as ambient temperature, target power zoning, and power operating time, the shared cooling module can be rationally allocated, which helps to reduce energy waste in the above thermal management system.

[0013] In one implementation of the first aspect, determining the target side of each of the shared cooling modules based on the ambient temperature, the target power partition, and the power continuous operating time includes: determining the target side of each of the shared cooling modules using a first mapping relationship based on the ambient temperature, the target power partition, and the power continuous operating time; wherein the first mapping relationship is used to characterize the correspondence between the ambient temperature, the target power partition, and the power continuous operating time and the target side of the shared cooling module.

[0014] In the implementation of the above scheme, the target side of each shared cooling module can be quickly determined by using a pre-determined first mapping relationship based on ambient temperature, power partitioning and power continuous operating time, which is beneficial to improving the thermal management efficiency of the above thermal management method.

[0015] In one implementation of the first aspect, determining the target side of each of the shared cooling modules based on the ambient temperature, the cell heating power, and the operating time of the battery pack includes: determining the target side of each of the shared cooling modules based on the ambient temperature, the cell heating power, the operating time of the battery pack, and the power consumption of each of the shared cooling modules.

[0016] In the implementation of the above scheme, taking into account the target side of each shared cooling module by comprehensively considering the ambient temperature, the heat generation power of the battery cell, the operating time of the battery pack, and the power consumption of each shared cooling module is beneficial to improving the energy efficiency of the above thermal management system.

[0017] In one 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. Determining the target side of each of the shared cooling modules based on the ambient temperature, the cell heating power, and the operating time of the battery pack group includes:

[0018] Based on the ambient temperature, the cell heating power, the battery pack operating time, 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 trigger state of the first dedicated cooling module, and the trigger state of the second dedicated cooling module are determined.

[0019] In the implementation of the above scheme, the working state of the thermal management system can be comprehensively determined based on ambient temperature, cell heating power, battery pack running time, power consumption of shared cooling module, power consumption of first dedicated cooling module and power consumption of second dedicated cooling module. On the one hand, this is conducive to improving 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 conducive to improving the thermal management flexibility of the above thermal management system.

[0020] In one implementation of the first aspect, determining the target side of each of the shared cooling modules, 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, 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 cell heating power, the battery pack operating time, 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 using a second mapping relationship.

[0022] The second mapping relationship is used to characterize the correspondence between the ambient temperature, the cell heating power, the battery pack operating time, 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 triggering state of the first dedicated cooling module, and the triggering state of the second dedicated cooling module, under the constraint of minimizing the overall operating power consumption of the thermal management system.

[0023] In the implementation of the above scheme, a pre-determined second mapping relationship can be used to quickly determine 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 based on ambient temperature, cell heating power, battery pack running time, power consumption of the shared cooling module, power consumption of the first dedicated cooling module, and power consumption of the second dedicated cooling module. This is beneficial to improving the thermal management efficiency of the management method.

[0024] In one implementation of the first aspect, the thermal management system further includes a dehumidification module, and the method further includes: acquiring the ambient humidity of the energy storage system; and when the ambient humidity is greater than a humidity threshold, activating the dehumidification module to reduce the ambient humidity to a humidity value not greater than the humidity threshold.

[0025] In the implementation of the above scheme, the ambient humidity of the energy storage system is monitored, and the dehumidification module is activated when the ambient humidity exceeds the humidity threshold to dehumidify the energy storage system. The dehumidification function helps to maintain a suitable humidity inside the system, thereby improving the safety of the energy storage system.

[0026] In one 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, the ambient temperature where the energy storage system is located, the cell temperature of the battery pack, and the start-up mode of the battery pack are obtained;

[0028] If the ambient temperature, the cell temperature, and the start-up method meet the preset heating conditions, then the heating module is turned on.

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

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

[0031] When the operating time of the battery pack is no greater than a preset time threshold, the target side of each of the shared cooling modules is determined based on the ambient temperature.

[0032] When the heat generation power of the battery cell exceeds a preset power threshold, the target side of each of the shared cooling modules is determined based on the ambient temperature, the heat generation power of the battery cell, and the operating time of the battery pack, including:

[0033] When the operating time of the battery pack exceeds the preset time threshold and the heat generation power of the battery cell exceeds the preset power threshold, the target side of each of the shared cooling modules is determined based on the ambient temperature, the heat generation power of the battery cell, and the operating time of the battery pack.

[0034] In the implementation of the above scheme, at the initial stage of the energy storage system startup, the target side of the shared cooling module is determined solely based on the ambient temperature. On the one hand, this enables the above thermal management method to 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, using ambient temperature as the main control parameter at the initial stage of the energy storage system startup can reduce energy waste and is beneficial to improving the overall energy consumption of the above thermal management system.

[0035] Secondly, embodiments of this application provide a thermal management system applied to an energy storage system. The energy storage system includes an energy storage converter group and a battery pack group. The thermal management system includes: one or more shared cooling modules, a first acquisition module, a second acquisition module, and a processing module. The shared cooling module, the first acquisition module, and the second acquisition module are electrically connected to the processing module, wherein:

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

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

[0038] The second acquisition module is used to acquire the cell heating power of the battery pack.

[0039] The processing module is configured to acquire the ambient temperature of the energy storage system and the cell heating power of the battery pack; when the cell heating power is not greater than a preset power threshold, determine the target side of each of the shared cooling modules based on the ambient temperature; wherein the target side is the side with greater temperature control requirements between the energy storage converter group side and the battery pack group side; when the cell heating power is greater than the preset power threshold, determine the target side of each of the shared cooling modules based on the ambient temperature, cell heating power, and battery pack operating time; and connect the shared cooling modules to the target cold circulation loop of the target side so that the shared cooling modules can dissipate heat from the target side.

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

[0041] The processing module is further configured to: determine the target side of each of the shared cooling modules, 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 heating power of the battery cell, 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.

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

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

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

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

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

[0047] The processing module is further configured to: when the energy storage system is started, acquire the ambient temperature of the energy storage system, the cell temperature of the battery pack, and the start-up mode of the battery pack; if the ambient temperature, the cell temperature, and the start-up mode meet preset heating conditions, then activate the heating module.

[0048] Thirdly, embodiments of this application provide an energy storage system, the energy storage system comprising: an energy storage converter 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 thereof.

[0049] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer program instructions, which, when read and executed by a processor, perform the method provided in the first aspect or any possible implementation thereof.

[0050] Fifthly, embodiments of this application provide a computer program product, the computer program product including a computer program, which, when executed by a processor, implements the method provided by the first aspect or any possible implementation of the first aspect.

[0051] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0052] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 is a schematic diagram of the thermal management system provided in an embodiment of this application;

[0054] Figure 2 is a schematic flowchart of the thermal management method provided in an embodiment of this application;

[0055] Figure 3 is a schematic diagram of another thermal management system architecture provided in an embodiment of this application;

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

[0057] Figure 5 is a schematic diagram of the operation logic of a thermal management method in an application scenario provided in an embodiment of this application. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0059] Energy storage converters and battery packs are key components of energy storage systems. They generate heat during operation, and without effective thermal management, this can lead to performance degradation, shortened lifespan, and even safety hazards. A thermal management system regulates the temperature of components such as energy storage converters and battery packs during system operation, ensuring efficient operation at suitable temperatures.

[0060] Related technologies typically design the battery side and the energy storage converter side as two independent thermal management systems, each with its own independent cooling circuit, without interference. However, this independent design means that when the cooling capacity on one side is insufficient, it cannot be compensated by the cooling capacity on the other side, or when the cooling capacity on one side is abundant, it cannot compensate for the cooling capacity on the other side, resulting in poor thermal management flexibility of the energy storage system.

[0061] Based on this, embodiments of this application provide a thermal management method. This method comprehensively considers the cell heating power, ambient temperature, and battery pack operating time to determine the target side of the shared cooling module shared between the energy storage converter side and the battery pack side. On the one hand, it enables the thermal management system to adjust the cooling strategy based on ambient temperature, cell heating power, and battery pack operating time, 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 by flexibly allocating the shared cooling module, which is beneficial to improving the energy efficiency of the thermal management system.

[0062] Understandably, since the above-mentioned thermal management methods are related to the architecture of the thermal management system, the following content will describe the thermal management methods in conjunction with the architecture of the thermal management system.

[0063] Please refer to Figure 1. This application embodiment provides a thermal management system 100 applied to an energy storage system 200. The energy storage system 200 includes an energy storage inverter 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, wherein:

[0064] A shared cooling module 110 is shared between the energy storage converter group 210 and the battery pack group 220, and is used to dissipate heat from the energy storage converter group 210 and / or the battery pack group 220.

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

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

[0067] The processing module 140 is used to: acquire the ambient temperature of the energy storage system 200 and the cell heating power of the battery pack 220; when the cell heating power is not greater than a 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 greater temperature control requirements between the energy storage converter group side and the battery pack group side; when the cell heating power is greater than the preset power threshold, determine the target side of each shared cooling module 110 based on the ambient temperature, cell heating power and battery pack running time; and connect the shared cooling module 110 to the target cold circulation loop of the target side so that the shared cooling module 110 can dissipate heat from the target side.

[0068] For example, the shared cooling module 110 can be connected to the cold circulation loop on the PCS side (i.e., the energy storage converter group side) and the PACK side (i.e., the battery pack group side) via pipelines equipped with electric valves. The electrical connection 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] For example, the shared cooling module 110 can be a cooling module such as an air-cooled module, a liquid-cooled module, or a compressor refrigeration module. Furthermore, when the thermal management system 100 has multiple shared cooling modules 110, various types of cooling modules can be configured. For instance, in a certain scenario, the thermal management system 100 has three shared cooling modules 110, including one air-cooled module, one liquid-cooled module, and one compressor refrigeration module.

[0070] It is understood that, in addition to being able to connect to the PCS-side cold circulation loop (energy storage converter group-side cold circulation loop) and the PACK-side cold circulation loop (battery pack group-side cold circulation loop) separately, the shared cooling module 110 can also connect to both the PCS-side cold circulation loop and the PACK-side cold circulation loop simultaneously. That is, the target side of the shared cooling module 110 can be one or both sides of the energy storage converter group side and the battery pack group side. Taking a thermal management system 100 that includes only one shared cooling module 110 as an example, if the shared cooling module 110 is simultaneously connected to both the PCS-side cold circulation loop and the PACK-side cold circulation loop, then the cold circulation path can be a series cold circulation loop, for example: energy storage converter group 210 → shared cooling module 110 → battery pack group 220 → energy storage converter group 210; the cold circulation loop can also be a parallel cold circulation loop, for example: energy storage converter group 210 → shared cooling module 110 → energy storage converter 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, which will not be elaborated in the embodiments of this application.

[0071] Additionally, it is understandable that, taking the thermal management system 100 as an example, which includes only one shared cooling module 110, the cases in which this shared cooling module 110 is simultaneously connected to both the energy storage converter group side and the battery pack group side include:

[0072] (1) The temperature control requirements of the energy storage converter 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 converter group side and the battery pack group side.

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

[0074] For example, the first acquisition module 120 can be a temperature sensor installed in the energy storage system 200, which can acquire the ambient temperature of the energy storage system 200.

[0075] For example, the second acquisition module 130 described above can acquire the cell heating power of the battery pack 220 in various ways, such as:

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

[0077] (2) The surface temperature of the battery can be monitored by devices such as thermal imaging cameras and temperature sensors, thereby estimating the heat generation 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 by a certain algorithm to estimate the heat generation power of the battery cell.

[0079] It is understandable that the method for obtaining the cell heating power can adopt a relatively mature technology in the relevant technology, which can obtain the cell heating power of the battery pack 220. This application embodiment will not be described in detail.

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

[0081] Please refer to Figure 2. This application embodiment provides a thermal management method applied to a thermal management system 100. The thermal management system 100 includes one or more shared cooling modules 110 shared between the energy storage converter group 210 side and the battery pack group 220 side in the energy storage system 200. The thermal management method includes:

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

[0083] Step S320: When the heat generation 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 greater temperature control requirements between the energy storage converter group 210 side and the battery pack group 220 side.

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

[0085] Step S340: Connect the shared cooling module 110 to the target cold circulation loop on the target side so that the shared cooling module 110 can dissipate heat to the target side.

[0086] In step S310 above, 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 cell heating power of the battery pack 220. For the schemes of the first acquisition module 120 acquiring the ambient temperature of the energy storage system 200 and the second acquisition module 130 acquiring the cell heating power of the battery pack 220, please refer to the above description of the thermal management system 100; these schemes will not be repeated in this embodiment.

[0087] It is understandable that, since the heat generated by the battery pack 220 is relatively small when the heat generation power of the battery cell is not greater than a preset power threshold, the above step S320 can determine the target side of each shared cooling module based solely on the ambient temperature. The following describes optional implementations of the above step S320 using scenarios where the thermal management system 100 includes only one shared cooling module 110 and scenarios where it includes multiple shared cooling modules 110 as examples:

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

[0089] Implementation Method 1: In Scenario 1, if it is assumed that the temperature in the energy storage system 200 is uniformly distributed, and the natural heat dissipation capacity of the energy storage converter group 210 and the battery pack group 220 is not considered, the ambient temperature at the energy storage converter group 210 and the battery pack group 220 is the same. Then the temperature control requirements on the energy storage converter group side are the same as those 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 converter group side and the battery pack group side. The shared cooling module 110 can provide cooling capacity to both the energy storage converter group side and the battery pack group side at the same time.

[0090] Implementation Method 2: In Scenario 1, considering the temperature distribution in the energy storage system 200 and without considering the natural heat dissipation capacity of the energy storage converter group 210 and the battery pack group 220, the ambient temperature on the energy storage converter group side and the battery pack group side can be collected by temperature sensors respectively. Since the temperature control requirement is greater on the side with higher ambient temperature, the side with higher ambient temperature can be determined as the target side.

[0091] Implementation Method 3: In Scenario 1, considering the temperature distribution in the energy storage system 200 and the natural heat dissipation capacity of the energy storage converter group 210 and the battery pack group 220, the side with higher ambient temperature and / or poorer natural heat dissipation capacity can be identified as the target side.

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

[0093] In this scenario, the triggering state (triggered or not triggered) of each shared cooling module 110 and the target side 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 total cooling capacity provided by the shared cooling module 110 on the target side of the energy storage converter group can meet the temperature control requirements of the energy storage converter group.

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

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

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

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

[0099] In the first implementation method, step S330 can calculate the average value of the heat generation power of the battery cell within a fixed time interval to reflect the heat generated by the battery pack 220 within this fixed time interval. Then, based on the ambient temperature and the heat generated by the battery pack 220, the temperature control requirements of each side are determined, thereby determining the target side of the shared cooling module 110 based on the temperature control requirements.

[0100] Implementation Method 2: The heat generation power of the battery cells is pre-divided into zones. The heat generation of the battery pack 220 is determined by identifying the target zone to which the heat generation power of the battery cells belongs and the duration of the battery pack 220 within that power zone. In this case, the solution for step S330 can be:

[0101] As an optional implementation of the above-mentioned thermal management method, step S330 includes: determining the target power zone to which the heat generation power of the battery cell belongs and the continuous power operation time of the battery pack 220 within the target power zone; and determining the target side of each shared cooling module based on the ambient temperature, the target power zone, and the continuous power operation time. For example, this implementation uses the target power zone and the continuous power operation time of the battery pack 220 within the target power zone to jointly reflect the heat generated by the battery pack 220. For instance, if the battery pack 220 operates continuously for a longer period within a larger target power zone, it will generate more heat. If the ambient temperature on the energy storage converter side and the battery pack side are the same, then the temperature control requirement on the battery pack side is relatively greater.

[0102] The above scheme determines the target side of the shared cooling module 110 based on ambient temperature, target power zoning, and power operating time, so that the shared cooling module 110 can be allocated according to 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 zoning, and power operating time, the shared cooling module 110 can be rationally allocated, which is beneficial to reducing energy waste in the thermal management system 100.

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

[0104] For example, the aforementioned first mapping relationship can be constructed based on multiple thresholds for ambient temperature, power partitioning, and continuous power operation time determined by empirical values, and then based on these multiple thresholds. Alternatively, the aforementioned first mapping relationship can also be learned using a machine learning model. The model is trained using ambient temperature, target power partitioning, and continuous power operation time as inputs, and the target side of the shared cooling module as the output, thereby obtaining the first mapping relationship. Of course, if a machine learning model is used to learn the first mapping relationship, step S330 can directly input the ambient temperature, power partitioning, and continuous power operation time into the trained machine learning model to obtain the target side of each shared cooling module 110 output by the machine learning model.

[0105] The above scheme can utilize a pre-determined first mapping relationship to quickly determine the target side of each shared cooling module using ambient temperature, power partitioning, and continuous power operation duration, which is beneficial to improving the thermal management efficiency of the above thermal management method.

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

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

[0108] Additionally, it is understood that step S330 can use the minimum overall operating power consumption of the thermal management system 100 as a constraint to determine the target side of each shared cooling module 110.

[0109] The above solution takes into account the target side of each shared cooling module 110 by comprehensively considering the ambient temperature, the heat generation power of the battery cell, the operating time of the battery pack 220, and the power consumption of each shared cooling module 110, which is conducive to improving the energy efficiency of the above thermal management system 100.

[0110] The above scheme describes the architecture of a thermal management system 100 including a shared cooling module 110 and a specific implementation of the thermal management method applied in this architecture. The following section provides a detailed description of another thermal management system 100 architecture and the thermal management method applied in this architecture:

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

[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 ambient temperature, cell heating power, battery pack 220 operating time, shared cooling module 110 power consumption, first dedicated cooling module 150 power consumption and second dedicated cooling module 160 power consumption.

[0113] It is understood that the "first" in the first dedicated cooling module 150 and the "second" in the second dedicated cooling module 160 do not refer to the number of dedicated cooling modules, but rather to the distinction between dedicated cooling modules located 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 understood that the aforementioned processing module 140 can use the minimum overall operating power consumption of the thermal management system 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.

[0115] For example, the first dedicated cooling module 150 and the second cooling module 160 mentioned above can adopt cooling modules such as air-cooled modules, liquid-cooled modules and compressor refrigeration modules, and the specific cooling module can be selected based on the specific application scenario.

[0116] It is understood that the first dedicated cooling module 150 is connected to the PCS-side cold circulation loop, and the second dedicated cooling module 160 is connected to the PACK-side cold circulation loop. Electric valves can be installed in the first dedicated cooling module 150 and the second dedicated cooling module 160 respectively. 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 mentioned above includes a liquid cooling unit that uses coolant circulation to dissipate heat from the energy storage converter group 210.

[0118] Optionally, the second dedicated cooling module 160 mentioned above includes a compressor cooling unit that uses compressor cooling to dissipate heat from the battery pack 220.

[0119] The following describes the thermal management method of the processing module 140 in the architecture of the aforementioned thermal management system 100:

[0120] As an optional implementation of the above-mentioned 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-mentioned step S330 includes:

[0121] Based on ambient temperature, cell heating power, battery pack 220 operating time, shared cooling module 110 power consumption, first dedicated cooling module 150 power consumption, and second dedicated cooling module 160 power consumption, 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.

[0122] It is understandable that step S330 above can use the minimum 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 is understandable 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 total cooling capacity provided by the shared cooling module 110 on the target side of the energy storage converter group and the cooling capacity provided by the first dedicated cooling module 150 when it is in the triggered state can meet the temperature control requirements of the energy storage converter group.

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

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

[0127] Understandably, 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 ambient temperature, cell heating power, battery pack 220 operating time, shared cooling module 110 power consumption, first dedicated cooling module 150 power consumption, and second dedicated cooling module 160 power consumption. Alternatively, machine learning models, such as deep neural network models, can be used to learn the relationship between ambient temperature, cell heating power, battery pack 220 operating time, shared cooling module 110 power consumption, first dedicated cooling module 150 power consumption, and second dedicated cooling module 160 power consumption, 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] In the implementation of the above scheme, the working state of the thermal management system 100 can be comprehensively determined based on ambient temperature, cell heating power, battery pack 220 operating time, shared cooling module 110 power consumption, first dedicated cooling module 150 power consumption, and second dedicated cooling module 160 power consumption. On the one hand, this is beneficial to improving the energy efficiency of the 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 improving the thermal management flexibility of the thermal management system 100.

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

[0130] Based on ambient temperature, cell heating power, battery pack 220 operating time, shared cooling module 110 power consumption, first dedicated cooling module 150 power consumption and second dedicated cooling module 160 power consumption, 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 using the second mapping relationship.

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

[0132] For example, the aforementioned second mapping relationship can be constructed based on empirical values ​​to determine multiple thresholds for ambient temperature, cell heating power, battery pack 220 operating time, shared cooling module 110 power consumption, first dedicated cooling module 150 power consumption, and second dedicated cooling module 160 power consumption, and then based on these multiple thresholds. Alternatively, the aforementioned second mapping relationship can also be learned using a machine learning model. The model takes ambient temperature, cell heating power, battery pack 220 operating time, shared cooling module 110 power consumption, first dedicated cooling module 150 power consumption, and second dedicated cooling module 160 power consumption as inputs, and takes 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 outputs. The machine learning model is then trained to obtain the second mapping relationship. Of course, if a machine learning model is used to learn the second mapping relationship, step S330 can directly utilize 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 ambient temperature, cell heating power, battery pack 220 operating time, shared cooling module 110 power consumption, first dedicated cooling module 150 power consumption, and second dedicated cooling module 160 power consumption, which is beneficial to improving the thermal management efficiency of the management method.

[0134] As an optional implementation of the above-mentioned thermal management method, the method further includes: when the running time of the battery pack 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 running time of the battery pack 220 is greater than a preset time threshold and the cell heating power is greater than a preset power threshold, determining the target side of each shared cooling module based on the ambient temperature, cell heating power and the running time of the battery pack.

[0136] It is understandable that in the initial stage of the start-up of the energy storage system 200, the thermal state of the energy storage converter group 210 and the battery pack group 220 is usually 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 take into account the ambient temperature, the heat generation power of the cells and the operating time of the battery pack group when the running time of the battery pack group 220 exceeds the preset time threshold, such as more than 15 minutes, to determine the target side of each shared cooling module.

[0137] In the implementation of the above scheme, at the initial stage of the energy storage system 200 startup, the target side of the shared cooling module 110 is determined only based on the ambient temperature. On the one hand, this enables the above thermal management method to respond quickly 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 stage of the energy storage system 200 startup, using ambient temperature as the main control parameter can reduce energy waste and is beneficial to improving the overall energy consumption of the above thermal management system 100.

[0138] The following describes other functions that the aforementioned thermal management system 100 can perform:

[0139] I. Dehumidification function:

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

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

[0142] For example, the thermal management system 100 may be equipped with a humidity sensor in the energy storage system 200 for collecting ambient humidity, 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 further includes a dehumidification module 170, and the above-mentioned thermal management method further includes: acquiring 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 so that the ambient humidity is reduced to a humidity value not greater than the humidity threshold.

[0144] The above solution monitors the ambient humidity of the energy storage system 200 and activates the dehumidification module 170 when the ambient humidity exceeds the humidity threshold, thereby dehumidifying the energy storage system 200. The dehumidification function helps maintain a suitable humidity inside the system, thereby improving the safety of the energy storage system 200.

[0145] II. Heating function:

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

[0147] The processing module 140 is further configured to: when the energy storage system 200 is started, acquire 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, cell temperature, and start-up mode meet preset heating conditions, then activate the heating module 180. For example, when the energy storage system 200 is started, acquire 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 statically started in a low-temperature environment and the cell temperature is not greater than 10°C, then activate the heating module 180.

[0148] For example, the processing module 140 can obtain the start-stop timestamp of the battery pack 220 through the battery management system (BMS), and then determine whether the battery pack 220 is in a static start state based on the start-stop timestamp.

[0149] For example, the heating module 180 described above can be a PTC heating module, a resistance heating module, an infrared heating module, an electromagnetic heating module, or other types of heating modules. The choice of heating type can be determined according to the specific application scenario, and will not be elaborated further in this embodiment.

[0150] In the implementation of the above scheme, the heating module 180 is controlled to heat the battery pack 220. On the one hand, this 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 is a specific application scenario to illustrate in detail the above-mentioned thermal management method and the working principle of the thermal management system 100:

[0152] Please refer to Figure 3. In this application scenario, the thermal management system 100 includes:

[0153] A shared cooling module 110 includes a first natural radiator 111 and a first cooling fan 112. 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 111 in dissipating heat.

[0154] A first dedicated cooling module 150 is used to dissipate heat on the energy storage converter group side. The module also includes a second natural radiator 151 and a second cooling fan 152. 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 heat dissipation on the battery pack side includes: a compressor 161, an air-cooled condenser 162, a cooling fan 163, a plate heat exchanger 164, and an electronic expansion valve 165. 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 includes 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 understood that the PTC heating module 181 can work together with the plate heat exchanger 164 in the second dedicated cooling module 160 for heating. The plate heat exchanger 164 can increase the heat exchange area, thereby transferring heat more effectively.

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

[0160] The first electronic water pump 191 is installed in the PCS-side cold circulation loop to enable the coolant to flow in the PCS-side cold circulation loop.

[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 PCS side cold circulation loop. When both the first electric two-way ball valve 192 and the second electric two-way ball valve 193 are connected, the shared cooling module 110 is connected to the PCS side cold circulation loop.

[0162] The second electronic water pump 194 is installed in the PACK-side cold circulation loop to enable the coolant to flow in the PACK-side cold circulation loop.

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

[0164] The first temperature sensor 196 and the first pressure sensor 197 installed at the outlet of the plate heat exchanger 164, and the second temperature sensor 198 and the second pressure sensor 199 installed at the compressor outlet, 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 operating modes of the aforementioned thermal management system 100 will be introduced:

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

[0168] (1) Energy storage converter group side: The first electric two-way ball valve 192 and the second electric two-way ball valve 193 are de-energized and closed, and the second natural radiator 151 provides cooling to meet the heat dissipation requirements of the PCS side.

[0169] Understandably, 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 T, it can be detected. pcs-0 Then 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 T. pcs-0 In such cases, only the second natural radiator 151 can be used for heat dissipation;

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

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

[0172] At this time, the battery pack 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 side.

[0173] Operating Mode 2 (Model 2): ​​The energy storage converter group is cooled by natural heat dissipation, while the battery pack group is cooled by both natural heat dissipation and compressor refrigeration. The operating status is as follows:

[0174] (1) Energy storage converter group side: The first electric two-way ball valve 192 and the second electric two-way ball valve 193 are de-energized and closed, and the second natural radiator 151 and the second cooling fan 152 provide cooling capacity;

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

[0176] (2) Battery pack side: When 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 at the same time.

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

[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 a shared cooling module 110 and a second dedicated cooling module 160 for heat dissipation, with the target side of the shared cooling module 110 being the battery pack side.

[0180] Operating Mode 3 (Model 3): The energy storage converter group is cooled by natural heat dissipation, while the battery pack group is cooled by compressor cooling. The operating status is as follows:

[0181] (1) Energy storage converter group side: The first electric two-way ball valve 192 and the second electric two-way ball valve 193 are de-energized and closed, and the second natural radiator 151 and the second cooling fan 152 provide cooling capacity;

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

[0183] (2) Battery pack side: When the electric three-way regulating valve 195 is activated, the coolant flows 100% to the plate heat exchanger 164, and the third electric two-way ball valve 1910 is de-energized and closed, and the cooling capacity is provided by the compressor.

[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 a second dedicated cooling module 160 for heat dissipation.

[0186] Operating Mode 4 (Model 4): The energy storage converter group is cooled by natural heat dissipation, while the battery pack group is cooled by compressor cooling. The operating status is as follows:

[0187] (1) Energy storage converter group side: The first electric two-way ball valve 192 and the second electric two-way ball valve 193 are energized 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 dissipate heat together, and the target side of the shared cooling module 110 is the energy storage converter group side.

[0189] (2) Battery pack side: When the electric three-way regulating valve 195 is activated, the coolant flows 100% to the plate heat exchanger 164, and the third electric two-way ball valve 1910 is de-energized and closed, and the cooling capacity is provided by the compressor.

[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 a second dedicated cooling module 160 for heat dissipation.

[0192] Operating Mode 5 (Dehumidification Mode):

[0193] Humidity is monitored in the compartment where the battery pack is located. When the humidity exceeds the preset humidity threshold, the dehumidification electric valve 173 and the dehumidification fan 172 are turned on. The return air flows through the dehumidification radiator 171 to complete the dehumidification and is then supplied to the compartment where the battery pack is located, forming an airflow 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 need for a traditional compressor dehumidification module, making the aforementioned thermal management system 100 more economical and efficient.

[0195] Working Mode 6 (Heating Mode):

[0196] If the battery pack 220 starts statically in a low-temperature environment and the cell temperature is no more than 10°C, then turn on the PTC heating module 181 and the second electronic water pump 194.

[0197] Please refer to Figure 5. The operating logic of the thermal management method applied to the above thermal management system 100 is introduced below:

[0198] (1) When the startup running time t0 of the energy storage system 200 is t0 ≤ 15 min, select the corresponding working mode based on the ambient temperature;

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

[0200] When T ≤ 10°C, adopt the above Model 1;

[0201] When 10 < T ≤ 20°C, adopt the above Model 2;

[0202] When 20 < T ≤ 45°C, adopt the above Model 3;

[0203] When T > 45°C, adopt the above Model 4.

[0204] (2) When the startup running time t0 of the energy storage system 200 is t0 > 15 min, select the working mode considering both the ambient temperature and the cell heating power:

[0205] When the cell heating power P ≤ 12 W, select the corresponding working mode based on the ambient temperature;

[0206] When the cell heating power 12 < P ≤ 16 W:

[0207] 1. When the ambient temperature T < 15°C, select the working mode according to the power duration t1 of the battery pack within the range of 12 < P ≤ 16 W:

[0208] When t1 < 30 min, select the corresponding working mode based on the ambient temperature;

[0209] When t1 ≥ 30 min, directly determine the working mode as the above Model 2;

[0210] 2. When the ambient temperature T ≥ 15°C, select the working mode according to the power duration t1 of the battery pack within the range of 12 < P ≤ 16 W:

[0211] When t1 ≤ 20 min, directly determine the working mode as the above Model 2;

[0212] When t1 > 20 min, directly determine the working mode as the above Model 3.

[0213] When the heating power P of the battery cell > 16 W:

[0214] 1. When the ambient temperature T < 30 °C, select the working mode according to the power duration t1 of the battery pack within the range of P > 16 W:

[0215] When t1 ≤ 10 min, select the corresponding working mode based on the ambient temperature;

[0216] When 10 < t1 ≤ 20 min, directly determine the working mode as the above Model 2;

[0217] When t1 > 20 min, directly determine the working mode as the above Model 3;

[0218] 2. When the ambient temperature T ≥ 30 °C, select the working mode according to the power duration t1 of the battery pack within the range of P > 16 W:

[0219] When t1 ≤ 7 min, directly determine the working mode as the above Model 3;

[0220] When t1 > 7 min, directly determine the working mode as the above Model 4.

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

[0222] It can be understood that the above thermal management system 100 may further include a memory and a communication interface. The memory includes one or more (only one is shown in the figure), which may be, but is not limited to, a random access memory (Random Access Memory, abbreviated as RAM), a read only memory (Read Only Memory, abbreviated as ROM), a programmable read only memory (Programmable Read-Only Memory, abbreviated as PROM), an erasable programmable read only memory (Erasable Programmable Read-Only Memory, abbreviated as EPROM), an electrically erasable programmable read only memory (Electric Erasable Programmable Read-Only Memory, abbreviated as EEPROM), etc. The processing module 140 and other possible components can access the memory, read and / or write data therein.

[0223] 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 aforementioned processing module 140 can be a general-purpose processor, including a Central Processing Unit (CPU), a Micro Controller 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 gate or transistor logic devices, or discrete hardware components.

[0224] A communication interface may include 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, a communication interface may be an Ethernet interface; it may be a mobile communication network interface, such as an interface for 3G, 4G, or 5G networks; or it may be other types of interfaces with data transmission and reception capabilities.

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

[0226] This application also provides a computer-readable storage medium storing computer program instructions, which are read and executed by a computer processor to perform the thermal management method provided in this application.

[0227] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0228] Furthermore, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0229] Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can 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 one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0231] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0232] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0233] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0234] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A thermal management method, characterized in that, Applied to a thermal management system, the thermal management system including one or more shared cooling modules shared between the energy storage converter group side and the battery pack group side in an energy storage system, the method includes: The ambient temperature of the energy storage system and the cell heating power of the battery pack are obtained. When the heat generation power of the battery cell is not greater than a preset power threshold, the target side of each of the shared cooling modules is determined based on the ambient temperature; wherein, the target side is the side with greater temperature control requirements between the energy storage converter group side and the battery pack group side. When the heat generation power of the battery cell is greater than the preset power threshold, the target side of each of the shared cooling modules is determined based on the ambient temperature, the heat generation power of the battery cell, and the operating time of the battery pack. Connecting the shared cooling module to the target cooling loop on the target side allows the shared cooling module to dissipate heat from the target side; determining the target side of each shared cooling module based on the ambient temperature, the cell heating power, and the battery pack operating time includes: Determine the target power zone to which the heating power of the battery cell belongs and the continuous power operation time of the battery pack within the target power zone; Based on the ambient temperature, the target power zone, and the continuous power operation duration, the target side of each of the shared cooling modules is determined; the determination of the target side of each of the shared cooling modules based on the ambient temperature, the target power zone, and the continuous power operation duration includes: Based on the ambient temperature, the target power zone, and the continuous power operation duration, a first mapping relationship is used to determine the target side of each of the shared cooling modules; wherein, the first mapping relationship is used to characterize the correspondence between the ambient temperature, the target power zone, and the continuous power operation duration and the target side of the shared cooling module.

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

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. Determining the target side of each of the shared cooling modules based on the ambient temperature, the cell heating power, and the battery pack group's operating time includes: Based on the ambient temperature, the cell heating power, the battery pack operating time, 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 trigger state of the first dedicated cooling module, and the trigger state of the second dedicated cooling module are determined.

4. The thermal management method according to claim 3, characterized in that, The determination of 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, 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: Based on the ambient temperature, the cell heating power, the battery pack operating time, 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 using a second mapping relationship. The second mapping relationship is used to characterize the correspondence between the ambient temperature, the cell heating power, the battery pack operating time, 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 triggering state of the first dedicated cooling module, and the triggering state of the second dedicated cooling module, under the constraint of minimizing the 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: Obtain the ambient humidity of the energy storage system; When the ambient humidity is greater than the humidity threshold, the dehumidification module is activated to reduce the ambient humidity to a value no 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, the ambient temperature where the energy storage system is located, the cell temperature of the battery pack, and the start-up mode of the battery pack are obtained; If the ambient temperature, the cell temperature, and the start-up method meet the preset heating conditions, then 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 includes: When the operating time of the battery pack is no greater than a preset time threshold, the target side of each of the shared cooling modules is determined based on the ambient temperature. When the heat generation power of the battery cell exceeds a preset power threshold, the target side of each of the shared cooling modules is determined based on the ambient temperature, the heat generation power of the battery cell, and the operating time of the battery pack, including: When the operating time of the battery pack exceeds the preset time threshold and the heat generation power of the battery cell exceeds the preset power threshold, the target side of each of the shared cooling modules is determined based on the ambient temperature, the heat generation power of the battery cell, and the operating time of the battery pack.

8. An energy storage system, characterized in that, The energy storage system includes: an energy storage converter group, a battery pack group, and a thermal management system, wherein the thermal management system includes a processing module for executing the thermal management method as described in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a computer, cause the computer to perform the method as described in any one of claims 1 to 7.

10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method as described in any one of claims 1 to 7.

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