Thermal management control method and energy storage system

Abstract

The invention relates to a thermal management control method and an energy storage system. The method comprises the following steps: acquiring a current environment temperature value of the energy storage system; when it is determined that the environment temperature value is larger than a first preset temperature threshold value, at least one target energy storage module needing heat management is recognized from all the energy storage modules; according to a thermal matching relationship between all the target energy storage modules and each liquid cooling module, performing thermal management batch division on all the target energy storage modules to obtain batch energy storage modules under at least one thermal management batch and corresponding batch liquid cooling modules; and in each heat management batch, carrying out charge and discharge control on the batch energy storage module, in the charge and discharge process of the batch energy storage module, controlling the batch liquid cooling module to start, and refrigerating the batch energy storage module by adjusting the state of a control valve between the batch energy storage module and the batch liquid cooling module until heat management of all target energy storage modules is completed. By adopting the system, the heat management control effect of the energy storage system can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, and in particular to a thermal management control method, an energy storage system, a computer device, a computer readable storage medium, and a computer program product. BACKGROUND

[0002] With the continuous development of science and technology, energy storage systems have been widely used in many fields due to their high energy density, strong stability, and long service life. A large number of energy storage cells are installed in the energy storage system, which can realize bidirectional conversion and efficient storage of electric energy. However, the energy storage cells generate heat during charging and discharging. Therefore, in order to ensure that the energy storage cells can maintain within the working temperature range, an external cooling system is needed to control the thermal management of the energy storage system.

[0003] Currently, in the process of thermal management control of the energy storage system, the cooling system usually uses a fixed refrigeration cycle to cool the energy storage system. However, since the refrigeration cycle is easily affected by environmental temperature fluctuations, the actual refrigeration capacity of the cooling system cannot match the set refrigeration capacity, which may cause the refrigeration capacity of the cooling system to decrease or the compressor of the cooling system to overload, etc. Therefore, the current thermal management control effect of the energy storage system is poor. SUMMARY

[0004] Therefore, it is necessary to provide a thermal management control method, an energy storage system, a computer device, a computer readable storage medium, and a computer program product for improving the thermal management control effect of the energy storage system.

[0005] In a first aspect, the present application provides a thermal management control method applied to an energy storage system. The energy storage system includes a control module, a plurality of liquid cooling modules, a plurality of energy storage modules, and a liquid cooling pipeline module. The liquid cooling pipeline module includes a liquid cooling main pipeline and a plurality of liquid cooling branch pipelines. The plurality of liquid cooling modules are connected in parallel through the liquid cooling main pipeline. Each liquid cooling module is connected one-to-one with the plurality of energy storage modules through the plurality of liquid cooling branch pipelines. A control valve is arranged on each liquid cooling branch pipeline. The thermal management control method includes:

[0006] obtaining an environmental temperature value of the energy storage system;

[0007] identifying at least one target energy storage module that needs thermal management in all energy storage modules when the environmental temperature value is greater than a first preset temperature threshold;

[0008] According to a heat matching relationship between all target energy storage modules and each liquid cooling module, the all target energy storage modules are divided into heat management batches to obtain batch energy storage modules under at least one heat management batch and corresponding batch liquid cooling modules, wherein the heat matching relationship represents a matching condition between heat release capability of the target energy storage modules and refrigeration capability of the liquid cooling module.

[0009] In each heat management batch, the batch energy storage modules are controlled to charge and discharge, and in the process of charging and discharging of the batch energy storage modules, the batch liquid cooling modules are controlled to start, and the batch energy storage modules are refrigerated by adjusting a state of a control valve between the batch energy storage modules and the batch liquid cooling modules until the all target energy storage modules complete heat management.

[0010] In a second aspect, the application provides an energy storage system, comprising a control module, a plurality of liquid cooling modules, a plurality of energy storage modules and a liquid cooling pipeline module, wherein the liquid cooling pipeline module comprises a liquid cooling main pipeline and a plurality of liquid cooling branch pipelines, the plurality of liquid cooling modules are connected in parallel through the liquid cooling main pipeline, each liquid cooling module is connected one by one with the plurality of energy storage modules through the plurality of liquid cooling branch pipelines, and a control valve is arranged on each liquid cooling branch pipeline.

[0011] The control module is configured to:

[0012] obtain an ambient temperature value of the energy storage system currently in; in a case where the ambient temperature value is greater than a first preset temperature threshold, identify at least one target energy storage module that needs to be heat managed in all energy storage modules; according to a heat matching relationship between all target energy storage modules and each liquid cooling module, divide the all target energy storage modules into heat management batches to obtain batch energy storage modules under at least one heat management batch and corresponding batch liquid cooling modules, wherein the heat matching relationship represents a matching condition between heat release capability of the target energy storage modules and refrigeration capability of the liquid cooling module; in each heat management batch, the batch energy storage modules are controlled to charge and discharge, and in the process of charging and discharging of the batch energy storage modules, the batch liquid cooling modules are controlled to start, and the batch energy storage modules are refrigerated by adjusting a state of a control valve between the batch energy storage modules and the batch liquid cooling modules until the all target energy storage modules complete heat management.

[0013] In a third aspect, the application further provides a computer device, comprising a memory and a processor, the memory stores a computer program, and the processor realizes the following steps when executing the computer program:

[0014] obtaining an ambient temperature value of the energy storage system; identifying at least one target energy storage module requiring thermal management from all energy storage modules when the ambient temperature value is greater than a first preset temperature threshold; dividing the target energy storage modules into batches for thermal management according to a thermal matching relationship between the target energy storage modules and each liquid cooling module, to obtain batch energy storage modules and corresponding batch liquid cooling modules in at least one thermal management batch, wherein the thermal matching relationship represents a matching condition between heat dissipation capacity of the target energy storage modules and refrigeration capacity of the liquid cooling modules; controlling the batch energy storage modules in each thermal management batch for charging and discharging, and controlling the batch liquid cooling modules to start and perform refrigeration on the batch energy storage modules by adjusting a state of a control valve between the batch energy storage modules and the batch liquid cooling modules during the charging and discharging of the batch energy storage modules, until the thermal management of all target energy storage modules is completed.

[0015] In a fourth aspect, the present application further provides a computer readable storage medium, having a computer program stored thereon, wherein the computer program is executed by a processor to implement the following steps:

[0016] obtaining an ambient temperature value of the energy storage system; identifying at least one target energy storage module requiring thermal management from all energy storage modules when the ambient temperature value is greater than a first preset temperature threshold; dividing the target energy storage modules into batches for thermal management according to a thermal matching relationship between the target energy storage modules and each liquid cooling module, to obtain batch energy storage modules and corresponding batch liquid cooling modules in at least one thermal management batch, wherein the thermal matching relationship represents a matching condition between heat dissipation capacity of the target energy storage modules and refrigeration capacity of the liquid cooling modules; controlling the batch energy storage modules in each thermal management batch for charging and discharging, and controlling the batch liquid cooling modules to start and perform refrigeration on the batch energy storage modules by adjusting a state of a control valve between the batch energy storage modules and the batch liquid cooling modules during the charging and discharging of the batch energy storage modules, until the thermal management of all target energy storage modules is completed.

[0017] In a fifth aspect, the present application further provides a computer program product, comprising a computer program, wherein the computer program is executed by a processor to implement the following steps:

[0018] obtaining an ambient temperature value at which the energy storage system currently locates; identifying at least one target energy storage module requiring thermal management from all energy storage modules in a case that the ambient temperature value is greater than a first preset temperature threshold; dividing the target energy storage modules into thermal management batches according to a thermal matching relationship between the target energy storage modules and each liquid cooling module, to obtain batch energy storage modules and corresponding batch liquid cooling modules in at least one thermal management batch, wherein the thermal matching relationship represents a matching condition between heat release capacity of the target energy storage modules and refrigeration capacity of the liquid cooling modules; controlling charging and discharging of the batch energy storage modules in each thermal management batch, and controlling the batch liquid cooling modules to start and refrigerate the batch energy storage modules by adjusting a state of a control valve between the batch energy storage modules and the batch liquid cooling modules during the charging and discharging of the batch energy storage modules, until the target energy storage modules complete thermal management.

[0019] The heat management control method is deployed with a control module, a plurality of liquid cooling modules, a plurality of energy storage modules and a liquid cooling pipeline module in the energy storage system, wherein the liquid cooling pipeline module comprises a liquid cooling main pipeline and a plurality of liquid cooling branch pipelines, the plurality of liquid cooling modules are connected in parallel through the liquid cooling main pipeline, each liquid cooling module and each energy storage module are connected in series through a liquid cooling branch pipeline, and a control valve is arranged on each liquid cooling branch pipeline; then, the current ambient temperature value of the energy storage system is obtained in real time, and at least one target energy storage module that needs to be heat managed is identified in all energy storage modules when it is determined that the ambient temperature value is greater than a first preset temperature threshold; then, the target energy storage modules are divided into heat management batches according to the heat matching relationship between the target energy storage modules and each liquid cooling module, to obtain batch energy storage modules and corresponding batch liquid cooling modules under at least one heat management batch, wherein the heat matching relationship represents the matching condition between the heat release capacity of the target energy storage module and the refrigeration capacity of the liquid cooling module; finally, the batch energy storage modules are controlled to charge and discharge in each heat management batch, and the batch liquid cooling modules are controlled to start in the charging and discharging process of the batch energy storage modules, and the batch energy storage modules are refrigerated by adjusting the state of the control valve between the batch energy storage modules and the batch liquid cooling modules, until all target energy storage modules complete heat management; since the target energy storage module that needs to be heat managed is actively identified when it is determined that the current ambient temperature value of the energy storage system is too high, and the state of the control valve of the corresponding liquid cooling module and energy storage module is adjusted based on the matching condition between the heat release capacity of the target energy storage module and the refrigeration capacity of the liquid cooling module, the refrigeration capacity for the target energy storage module can be actively enhanced, that is, the refrigeration capacity of the plurality of liquid cooling modules can be matched with the heat release capacity of the target energy storage module in real time, so that the heat balance of the energy storage system in the charging and discharging process can be ensured, instead of only relying on the fixed refrigeration capacity to act on the charging and discharging process of the energy storage system, so that the technical defects such as the actual refrigeration capacity of the cooling system cannot match the set refrigeration capacity due to the influence of environmental temperature fluctuations in the refrigeration cycle, and the refrigeration capacity of the cooling system is reduced or the compressor of the cooling system is overloaded are overcome, and the effect of heat management control of the energy storage system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings needed to be used in the embodiments or related art descriptions. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating any inventive labor.

[0021] Figure 1 It is a flowchart of the heat management control method in an embodiment;

[0022] Figure 2 Connection diagram of multiple battery modules for a thermal management control method in one embodiment;

[0023] Figure 3 Flow diagram of a thermal management control method in another embodiment;

[0024] Figure 4 Flow diagram of thermal management control of an energy storage system for a thermal management control method in another embodiment;

[0025] Figure 5 Partial connection diagram between a liquid cooling module and an energy storage module before starting thermal management control for a thermal management control method in another embodiment;

[0026] Figure 6 Partial connection diagram between a liquid cooling module and an energy storage module after starting thermal management control for a thermal management control method in another embodiment;

[0027] Figure 7 Structure diagram of an energy storage system in one embodiment;

[0028] Figure 8 Internal structure diagram of a computer device in one embodiment. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, a more full disclosure of the application will be made in conjunction with the accompanying drawings. The drawings are provided only for purposes of illustrating the embodiments of the present application and should not be considered as limiting the present application. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present application. In the drawings:

[0030] 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 belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0031] It should be understood that the terms "first", "second", etc. can be used herein to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first temperature difference can be called a second temperature difference without departing from the scope of the present application, and similarly, a second temperature difference can be called a first temperature difference. Both the first temperature difference and the second temperature difference are temperature differences, but they are not the same temperature difference.

[0032] It can be understood that "connection" in the following embodiments, if the circuits, modules, units and the like connected to each other have the transmission of electrical signals or data, should be understood as "connected", "communication connection" and the like.

[0033] It can be understood that "at least one" means one or more, and "multiple" means two or more. "At least part of the element" means part or all of the element.

[0034] As used herein, the singular forms "a", "an" and "the" can include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "comprise / contain" or "provided with" and the like specifies the existence of the stated features, integers, steps, operations, components, parts or combinations thereof, but does not exclude the possibility of the presence or addition of one or more other features, integers, steps, operations, components, parts or combinations thereof. At the same time, the term "and / or" used in the specification includes any and all combinations of the related listed items.

[0035] Firstly, it should be understood that the energy storage system is an integrated energy storage carrier, control protection unit and auxiliary device, which realizes a complete equipment system of electric energy storage, conversion and on-demand release. Specifically, it can include a PCS (Power Conversion System, energy storage converter), a battery module, an EMS (Energy Management System, energy management system), a BMS (Battery Management System, battery management system), and a heat dissipation device, etc. During the operation of the energy storage system, heat will be generated due to energy conversion and internal impedance influence, etc. If the temperature is not controlled or out of control, it may cause the efficiency of the battery cell to decrease, the service life to decrease or thermal runaway, and thus directly affect the safety, service life and operating efficiency of the energy storage system. Therefore, an external cooling system is usually used to control the thermal management of the energy storage system to ensure that the battery cells in the energy storage system can be maintained within the working temperature range. At present, the cooling system usually cools the energy storage system through a fixed refrigeration cycle. Specifically, the low-temperature and low-pressure gaseous refrigerant is first compressed into high-temperature and high-pressure gaseous refrigerant by a compressor. The high-temperature and high-pressure gaseous refrigerant is converted into medium-temperature and high-pressure liquid refrigerant after entering the condenser. The medium-temperature and high-pressure liquid refrigerant is converted into low-temperature and low-pressure liquid refrigerant by the pressure reduction of the expansion valve. The low-temperature and low-pressure liquid refrigerant enters the evaporator to absorb the heat of the energy storage system, and is then converted into low-temperature and low-pressure gas. Then it enters the next cycle again to continuously take away the heat of the energy storage system to realize refrigeration. However, this refrigeration method is easily affected by the ambient temperature. For example, in the case of high ambient temperature, the actual refrigeration capacity of the cooling system is difficult to match the set refrigeration capacity, which may cause problems such as refrigeration capacity reduction and compressor overload, thereby affecting the operating efficiency, service life and operating stability of the energy storage system. Therefore, there is an urgent need for a thermal management control method that can improve the effect of thermal management control of the energy storage system.

[0036] In one embodiment, as Figure 1As shown, a thermal management control method is provided, and the embodiment is exemplified by the method applied to an energy storage system, which comprises a control module, a plurality of liquid cooling modules, a plurality of energy storage modules and a liquid cooling pipeline module. The control module refers to a functional carrier for thermal management control of the energy storage system, which can specifically include a microprocessor, a programmable logic controller and a control board, etc. The liquid cooling module refers to a functional carrier for absorbing and transferring the heat generated by the energy storage module, which can specifically be a liquid cooling unit, which can include a compressor, a refrigeration device, a throttling element and an evaporator, etc. The energy storage module refers to a functional carrier for storing energy in the energy storage system, which can specifically be a battery module, which can include battery cells, cell support structures, connecting components and acquisition components, etc. The liquid cooling pipeline module refers to a functional carrier responsible for the circulation and delivery of the cooling medium in the energy storage system, which can specifically include delivery components, control components and sealing components, etc. The liquid cooling pipeline module includes a liquid cooling main pipeline and a plurality of liquid cooling branch pipelines. The plurality of liquid cooling modules are connected in parallel through the liquid cooling main pipeline. Each liquid cooling module is connected one-to-one with a plurality of energy storage modules through a plurality of liquid cooling branch pipelines. A control valve is arranged on each liquid cooling branch pipeline. The control valve can specifically be a two-way valve, a three-way valve, a four-way valve and a ball valve, etc. The control module is deployed with an acquisition unit, an identification unit, a division unit and a thermal management unit. The acquisition unit is used to acquire the ambient temperature value of the energy storage system. The identification unit is used to identify at least one target energy storage module that needs to be thermally managed in all energy storage modules under the condition that the ambient temperature value is greater than a first preset temperature threshold. The division unit is used to divide the thermal management batches of all target energy storage modules according to the thermal matching relationship between all target energy storage modules and each liquid cooling module, to obtain batch energy storage modules and corresponding batch liquid cooling modules under at least one thermal management batch, wherein the thermal matching relationship represents the matching condition between the heat dissipation capacity of the target energy storage module and the refrigeration capacity of the liquid cooling module. The thermal management module is used to control the batch liquid cooling module to start and perform refrigeration on the batch energy storage module by adjusting the state of the control valve between the batch energy storage module and the batch liquid cooling module during the charging and discharging process of the batch energy storage module, so as to complete the thermal management of all target energy storage modules. Further, through the information interaction between the acquisition unit, the identification unit, the division unit and the thermal management unit, the refrigeration capacity for the target energy storage module can be actively enhanced, that is, the refrigeration capacity of the plurality of liquid cooling modules can be matched with the heat dissipation capacity of the target energy storage module in real time, so as to ensure the thermal balance of the energy storage system during the charging and discharging process. Therefore, the thermal management control of the energy storage system can be effectively realized. In the embodiment, the method comprises the following steps:

[0037] Step 202, acquiring the ambient temperature value of the energy storage system.

[0038] It should be noted that the energy storage module is the basic energy unit of the energy storage system, and the energy storage module can be composed of a plurality of secondary batteries through a certain connection mode, and the connection mode can be series connection and parallel connection. The secondary battery refers to a battery that can be repeatedly charged, such as a lithium ion battery. In an implementable manner, an ambient temperature sensor can be deployed outside the energy storage system, and the ambient temperature sensor can be used to collect the ambient temperature value of the energy storage system. It can be understood that since the energy storage system continuously generates heat during operation, the ambient temperature value of the energy storage system can be used as a basis for determining whether to perform thermal management control on the energy storage system. For example, if the ambient temperature value is higher than the optimal working temperature of the battery 28℃, the natural heat dissipation capacity of the energy storage system is limited, and the heat generated by the energy storage system will accumulate inside. If the energy storage system is not controlled by thermal management, the temperature of the battery may rise above the safety threshold.

[0039] As an example, step 202 includes: periodically collecting a plurality of real-time temperature values of the energy storage system during normal charging and discharging of all energy storage modules of the energy storage system, and performing mean value processing on the plurality of real-time temperature values to obtain an ambient temperature value of the energy storage system.

[0040] Step 204, in the case where the ambient temperature value is greater than the first preset temperature threshold, identifying at least one target energy storage module that needs to be thermally managed in all energy storage modules.

[0041] It should be noted that the first preset temperature threshold can be set according to requirements, which can be denoted as The optimal working temperature of the battery cell can be set as the first preset temperature threshold, and the optimal working temperature of the battery cell can be any temperature value in the temperature range of 25-35℃, such as 25℃, 30℃ or 35℃, etc. After obtaining the ambient temperature value, the ambient temperature value and the first preset temperature threshold are compared to determine the heat balance capacity of the energy storage system. It can be understood that in the case where the ambient temperature value is greater than the first preset temperature threshold, the battery cell temperature will continue to rise and exceed the safety value due to the liquid cooling module derating, and then the target energy storage module that needs to be thermally managed needs to be identified in all energy storage modules, and the number of target energy storage modules can be one or more.

[0042] It should be noted that in the energy storage system, a plurality of energy storage modules can be labeled based on the spatial positions of different energy storage modules. For example, in an implementable manner, the energy storage module is a battery module, and with reference to Figure 2 , Figure 2In order to represent the connection schematic diagram of the plurality of battery modules, wherein the plurality of battery modules comprises battery module 1, battery module 2, …, battery module m-1 and battery module m arranged in sequence from top to bottom, any battery module comprises n battery clusters, any battery cluster comprises n battery packs, and m and n are positive integers. It can be understood that the marking rule for marking each battery pack can be set as required, for example, the marking rule can be a rule of marking from left to right or from right to left. In this way, each battery pack in the plurality of battery modules of the energy storage system has an independent identification, for example, battery pack 1-1 of the first battery module, battery pack 1-2 of the first battery module, battery pack 1-n of the first battery module, battery pack 1-1 of the second battery module and battery pack 1-2 of the second battery module, etc. In this way, all energy storage modules in the energy storage system have an identity, so that the control module can specifically identify the target energy storage module that needs to be heat managed. For example, in an implementable manner, assuming that there are 5 energy storage modules in total, the total number of energy storage modules that need to be heat managed is set to 3, and then 3 energy storage modules with the highest temperature can be selected as the target energy storage modules.

[0043] As an example, step 204 comprises: comparing the ambient temperature value with the first preset temperature threshold value, and in the case of comparing that the ambient temperature value is greater than the first preset temperature threshold value, collecting respective first temperature values of all energy storage modules, comparing all first temperature values with the safe running temperature threshold value, and selecting the energy storage module corresponding to the first temperature value greater than the safe running temperature threshold value as the target energy storage module.

[0044] As another example, step 204 comprises: comparing the ambient temperature value with the first preset temperature threshold value, and in the case of comparing that the ambient temperature value is greater than the first preset temperature threshold value, collecting respective second temperature values of all energy storage modules, performing heat management priority sorting on all energy storage modules according to all second temperature values to obtain a heat management priority sorting result, and selecting at least one energy storage module with a high priority in the heat management priority sorting result as the target energy storage module.

[0045] It can be understood that the first temperature value and the second temperature value can both represent the average temperature value of the energy storage module, which can be calculated based on the actual temperature of each battery cell fed back by the temperature sensor deployed in the energy storage module.

[0046] In an implementable manner, the ambient temperature value is compared with the first preset temperature threshold value, and in the case of comparing that the ambient temperature value is less than or equal to the first preset temperature threshold value, the step of obtaining the ambient temperature value of the energy storage system currently located is executed, and all energy storage modules are controlled to perform normal charging and discharging.

[0047] At step 206, according to the heat matching relationship between all target energy storage modules and each liquid cooling module, the target energy storage modules are divided into heat management batches to obtain batch energy storage modules and corresponding batch liquid cooling modules under at least one heat management batch, wherein the heat matching relationship represents the matching between the heat dissipation capacity of the target energy storage modules and the refrigeration capacity of the liquid cooling module.

[0048] It should be noted that, in order to realize the accurate matching of the internal heat dissipation demand and the heat dissipation supply of the energy storage system, the heat management batch division can be performed on all target energy storage modules after all target energy storage modules are identified. For example, in different application scenarios, the number of target energy storage modules that need to be heat managed is random, while the number of liquid cooling modules is usually fixed, and the refrigeration capacity of each liquid cooling module has an upper limit. Therefore, the heat management balance under each heat management batch needs to be ensured by relying on the heat matching relationship. The batch energy storage modules represent the target energy storage modules under the same heat management batch, which can be one or more. The batch liquid cooling module is a liquid cooling module matched with the batch energy storage module. It can be understood that the number of batch liquid cooling modules needs to meet the total heat dissipation demand of all target energy storage modules under the heat management batch. Different liquid cooling modules under the same heat management batch can be the same or different. For example, the liquid cooling modules under a certain heat management batch can include liquid cooling module A with a refrigeration power of and liquid cooling module B with a refrigeration power of In an implementable manner, the heat matching relationship can be a structured mapping table of the heat dissipation characteristic parameters (such as heat dissipation power) of all target energy storage modules and the refrigeration characteristic parameters (such as refrigeration power) of each liquid cooling module. By integrating all structured mapping tables, the corresponding relationship between the heat dissipation capacity of all target energy storage modules and the refrigeration capacity of all liquid cooling modules can be clearly determined, and the heat management batch division can be adaptively completed. Assuming that there are target energy storage modules, liquid cooling modules, through the heat matching relationship, the target energy storage modules can be divided into two heat management batches. Under the first heat management batch, the liquid cooling modules are used to refrigerate the target energy storage modules, the total refrigeration capacity of the liquid cooling modules is greater than or equal to the total heat dissipation capacity of the target energy storage modules, and under the second heat management batch, the liquid cooling modules are used to refrigerate the target energy storage modules, the total refrigeration capacity of the liquid cooling modules is greater than or equal to the total heat dissipation capacity of the target energy storage modules, and , .

[0049] As an example, step 206 comprises: determining total refrigeration power of all liquid cooling modules according to thermal matching relationship between all target energy storage modules and each liquid cooling module, performing thermal management batch division on all target energy storage modules with total refrigeration power as a constraint to obtain batch energy storage modules under at least one thermal management batch, and matching corresponding batch liquid cooling modules for batch energy storage modules among all liquid cooling modules according to total heat dissipation power of batch energy storage modules.

[0050] Step 208, in each thermal management batch, performing charge and discharge control on batch energy storage modules, and in the process of charge and discharge of batch energy storage modules, controlling batch liquid cooling modules to start and performing refrigeration on batch energy storage modules by adjusting the state of control valves between batch energy storage modules and batch liquid cooling modules until all target energy storage modules complete thermal management.

[0051] It should be noted that after the thermal management batch is divided, the state of the control valve of the liquid cooling branch pipeline in which the liquid cooling module in the current thermal management batch is located can be adjusted by the control module to refrigerate the energy storage module in the current thermal management batch, so that the refrigeration capacity of multiple liquid cooling modules can be more accurately applied to the target energy storage module to realize the matching of the heat dissipation capacity of the target energy storage module and the refrigeration capacity of multiple liquid cooling modules. Specifically, the control valve between batch energy storage modules and batch liquid cooling modules can be adjusted from a closed state to an open state, or the control valve between batch energy storage modules and batch liquid cooling modules can be adjusted from a first preset opening degree to a second preset opening degree, wherein the first preset opening degree is less than the second preset opening degree.

[0052] As an example, step 208 comprises: in each thermal management batch, sequentially performing charge and discharge control on all target energy storage modules in batch energy storage modules, and for any target energy storage module in batch energy storage modules, synchronously controlling the corresponding liquid cooling module of the target energy storage module to start in the process of charge and discharge of the target energy storage module, and performing refrigeration on the target energy storage module by opening the control valve between the target energy storage module and the liquid cooling module until all target energy storage modules of the energy storage system complete thermal management.

[0053] The above heat management control method is deployed with a control module, a plurality of liquid cooling modules, a plurality of energy storage modules and a liquid cooling pipeline module in an energy storage system, wherein the liquid cooling pipeline module comprises a liquid cooling main pipeline and a plurality of liquid cooling branch pipelines, the plurality of liquid cooling modules are connected in parallel through the liquid cooling main pipeline, each liquid cooling module and each energy storage module are connected in series through a liquid cooling branch pipeline, and a control valve is arranged on each liquid cooling branch pipeline; then, the current ambient temperature value of the energy storage system is obtained in real time, and at least one target energy storage module that needs to be heat managed is identified in all energy storage modules when it is determined that the ambient temperature value is greater than a first preset temperature threshold; then, the target energy storage modules are divided into heat management batches according to the heat matching relationship between the target energy storage modules and each liquid cooling module, to obtain batch energy storage modules and corresponding batch liquid cooling modules under at least one heat management batch, wherein the heat matching relationship represents the matching condition between the heat dissipation capacity of the target energy storage module and the refrigeration capacity of the liquid cooling module; finally, the batch energy storage modules are controlled to charge and discharge in each heat management batch, and the batch liquid cooling modules are controlled to start in the charging and discharging process of the batch energy storage modules, and the batch energy storage modules are refrigerated by adjusting the state of the control valve between the batch energy storage modules and the batch liquid cooling modules, until all target energy storage modules complete heat management; since the target energy storage module that needs to be heat managed is actively identified when it is determined that the current ambient temperature value of the energy storage system is too high, and the state of the control valve of the corresponding liquid cooling module and energy storage module is adjusted based on the matching condition between the heat dissipation capacity of the target energy storage module and the refrigeration capacity of the liquid cooling module, the refrigeration capacity for the target energy storage module can be actively enhanced, that is, the refrigeration capacity of the plurality of liquid cooling modules can be matched with the heat dissipation capacity of the target energy storage module in real time, so that the heat balance of the energy storage system in the charging and discharging process can be ensured, instead of relying on the fixed refrigeration capacity to act on the charging and discharging process of the energy storage system, so that the technical defects such as the actual refrigeration capacity of the cooling system cannot match the set refrigeration capacity due to the influence of environmental temperature fluctuations in the refrigeration cycle, and the refrigeration capacity of the cooling system is reduced or the compressor of the cooling system is overloaded are overcome, and the effect of heat management control of the energy storage system is improved.

[0054] In one embodiment, referring to Figure 3 each energy storage module comprises a plurality of battery clusters; identifying at least one target energy storage module that needs to be heat managed in all energy storage modules comprises:

[0055] In step 302, for any energy storage module, when it is detected that the average temperature value of the energy storage module is less than a second preset temperature threshold, the current temperature value of each battery cluster in the energy storage module is obtained.

[0056] It should be noted that in the actual operation process of the energy storage system, for a single energy storage module, there is a problem of lag or failure of thermal management decision by using a single overall index to evaluate the thermal risk of the energy storage module. For example, if there is a local high temperature condition in the energy storage module, even if the overall temperature of the energy storage module is controllable, the energy storage module still has a thermal management risk. Therefore, in order to improve the accuracy of thermal management control of the energy storage system, the current temperature value of the local battery cluster and the temperature difference between adjacent battery clusters can be used as indexes to control the local temperature condition in the energy storage module and the temperature condition between adjacent clusters in the energy storage module.

[0057] It should be noted that the energy storage module is composed of a plurality of battery clusters, and the battery cluster refers to a battery subunit formed by a plurality of batteries in series or parallel connection. By deploying a temperature sensor in each battery cluster, the current temperature value corresponding to each of the plurality of battery clusters in the energy storage module can be obtained. The average temperature value of the energy storage module can be obtained by averaging the current temperature values of the local battery clusters. For example, in an implementable manner, assuming that there are 8 battery clusters in a certain energy storage module, the average temperature value of the energy storage module is calculated by using the current temperature values provided by 3 battery clusters. If the average temperature value is less than the second preset temperature threshold, the current temperature values corresponding to each of the 8 battery clusters are further collected.

[0058] As an example, step 302 includes: for any energy storage module, collecting the current temperature values corresponding to each of the preset number of battery clusters in the energy storage module, performing mean value processing on the current temperature values corresponding to each of the preset number of battery clusters to obtain the average temperature value of the energy storage module, comparing the average temperature value with the second preset temperature threshold, and collecting the current temperature values corresponding to each of all battery clusters in the energy storage module if the average temperature value is less than the second preset temperature threshold.

[0059] Step 304, determining the temperature difference extreme value of each energy storage module and the first temperature difference value between adjacent battery clusters in each energy storage module according to the plurality of current temperature values.

[0060] It should be noted that the temperature difference extreme value represents the difference between the highest working temperature and the lowest working temperature of all battery clusters in the energy storage module. The temperature difference extreme value can reflect the overall temperature difference in a single energy storage module, which can be 7℃, 8℃ or 9℃, etc. The first temperature difference value represents the temperature difference between adjacent battery clusters in the energy storage module. The first temperature difference value can reflect the local temperature difference in a single energy storage module.

[0061] As an example, step 304 comprises: for any energy storage module, selecting a highest current operating temperature and a lowest current operating temperature from the plurality of current temperature values, obtaining a temperature difference extreme value of each energy storage module by subtracting the highest current operating temperature from the lowest current operating temperature, and obtaining a plurality of first temperature difference values by subtracting the respective current temperature values of adjacent battery clusters in the energy storage module.

[0062] Step 306, in the case where the temperature difference extreme value is greater than a first preset temperature difference threshold and there is at least one group of adjacent battery clusters between which the first temperature difference value is greater than a second preset temperature difference threshold, the energy storage module is identified as a target energy storage module that needs to be subjected to thermal management.

[0063] It should be noted that, in combination with the temperature difference extreme value and the first temperature difference value, the temperature difference within a single battery module can be comprehensively judged, and thus the energy storage module with both overall temperature difference and local temperature difference being large is identified as the target energy storage module, so as to be able to match the specific thermal management needs of the energy storage system.

[0064] As an example, step 306 comprises: comparing the temperature difference extreme value with the first preset temperature difference threshold, and comparing the first temperature difference values between all adjacent battery clusters with the second preset temperature difference threshold, and in the case where the temperature difference extreme value is greater than the first preset temperature difference threshold and there is at least one group of adjacent battery clusters between which the first temperature difference value is greater than the second preset temperature difference threshold, the energy storage module is identified as a target energy storage module that needs to be subjected to thermal management.

[0065] In an implementable manner, in the case where the temperature difference extreme value is less than or equal to the first preset temperature difference threshold, or in the case where the temperature difference extreme value is less than or equal to the first preset temperature difference threshold and the first temperature difference values between all adjacent battery clusters are less than or equal to the second preset temperature difference threshold, the energy storage module is not identified as a target energy storage module that needs to be subjected to thermal management.

[0066] In the present embodiment, for the energy storage module with the average temperature value being less than the second preset temperature threshold, the temperature difference extreme value of the energy storage module is further obtained, the overall temperature difference within the energy storage module is reflected through the temperature difference extreme value, the first temperature difference value of the energy storage module is obtained, the local temperature difference within the energy storage module is reflected through the first temperature difference value, and the temperature difference within the energy storage module is comprehensively judged through the temperature difference extreme value and the first temperature difference value, and the energy storage module with large temperature difference is identified as the target energy storage module, so as to be able to avoid the case where the high-risk energy storage module is not subjected to corresponding thermal management control, and thus, while laying a foundation for improving the effect of thermal management control of the energy storage system, a foundation for improving the control accuracy of thermal management control of the energy storage system is simultaneously laid.

[0067] In one embodiment, according to the thermal matching relationship between all target energy storage modules and each liquid cooling module, the target energy storage modules are divided into thermal management batches to obtain batch energy storage modules and corresponding batch liquid cooling modules under at least one thermal management batch, including:

[0068] The first total number of all target energy storage modules is obtained, and the second total number of all liquid cooling modules is obtained; according to the thermal matching relationship, the number matching relationship between the energy storage modules and the liquid cooling modules in a single thermal management batch is determined; according to the number matching relationship, the first total number and the second total number, the required thermal management batch quantity of all target energy storage modules is identified; according to the number matching relationship and the thermal management batch quantity, all target energy storage modules are divided into batch energy storage modules of at least one thermal management batch to obtain a batch division result; and according to the batch division result and the number matching relationship, the corresponding batch liquid cooling modules are matched for all batch energy storage modules.

[0069] It should be noted that in the energy storage system, the liquid cooling module is a high-cost device, and therefore in actual application scenarios, it is inevitable to balance the effect and control cost of thermal management control of the energy storage system. Therefore, in the process of thermal management batch division, the total heat dissipation capacity and the total refrigeration capacity under different thermal management batches can be quantified based on the thermal matching relationship, so as to accurately control the supply and demand relationship between the target energy storage modules and the liquid cooling modules; the first total number of the target energy storage modules and the second total number of the liquid cooling modules can be obtained by mapping the corresponding identity number; the number matching relationship is used to reflect the number relationship in a single thermal management batch, that is, one thermal management module needs one liquid cooling module; for example, in one implementable manner, the total heat dissipation power of all target energy storage modules C can be extracted as , the total refrigeration power of all liquid cooling modules D is , and the number matching relationship between the energy storage modules and the liquid cooling modules is ; the thermal management batch quantity represents the total number of batches that need to be managed, for example, in one implementable manner, assuming that the first total number of target energy storage modules is 10, the total number of all liquid cooling modules is 3, and the number matching relationship is The calculated candidate thermal management batch quantities can be 2 (the first thermal management batch manages 6 target energy storage modules, the second thermal management batch manages 4 target energy storage modules), 3 (the first thermal management batch manages 6 target energy storage modules, the second thermal management batch manages 3 target energy storage modules, and the third thermal management batch manages 1 target energy storage module), or 4 (the first thermal management batch manages 3 target energy storage modules, the second thermal management batch manages 3 target energy storage modules, the third thermal management batch manages 3 target energy storage modules, and the fourth thermal management batch manages 1 target energy storage module), etc., and a candidate thermal management batch quantity (e.g., 4) is randomly selected as the thermal management batch quantity required by the target energy storage module; then, based on the thermal management batch quantity and quantity matching relationship, the batch energy storage modules can be divided, and the corresponding batch liquid cooling modules can be matched for the batch energy storage modules.

[0070] As an example, the identifiers of all target energy storage modules are mapped to a first total quantity, and the identifiers of all liquid-cooled modules are mapped to a second total quantity. The quantity matching relationship between energy storage modules and liquid-cooled modules in a single thermal management batch is obtained through thermal matching relationship conversion. The quantity matching relationship, the first total quantity, and the second total quantity are input into a first preset calculation formula to calculate at least one candidate thermal management batch quantity for all target energy storage modules, and the required thermal management batch quantity for all target energy storage modules is selected from each candidate thermal management batch quantity. Using the quantity matching relationship and the thermal management batch quantity as constraints, all target energy storage modules are divided into batch energy storage modules of at least one thermal management batch, resulting in batch division results. Based on the batch division results and the quantity matching relationship, corresponding batch liquid-cooled modules are matched for all batch energy storage modules.

[0071] In this embodiment, based on the thermal matching relationship between all target energy storage modules and each liquid cooling module, the quantity matching relationship between energy storage modules and liquid cooling modules in a single thermal management batch is determined. This allows for precise quantification of the matching between the supply of liquid cooling resources and the demand for heat release from energy storage in a single thermal management batch. Thus, during the division of thermal management batches, the heat release capacity and cooling capacity in the thermal management control process are always kept in balance, thereby avoiding resource waste caused by overload operation of liquid cooling modules in the energy storage system. Therefore, this lays the foundation for improving the effectiveness of thermal management control of the energy storage system while simultaneously reducing the control cost of thermal management control of the energy storage system.

[0072] In one embodiment, the required heat management batch quantity of all target energy storage modules is identified according to the quantity matching relationship, the first total quantity and the second total quantity, including: determining an upper limit value of the number of energy storage modules that can be refrigerated by all liquid cooling modules under a single heat management batch according to the quantity matching relationship and the second total quantity; in the case that the first total quantity is less than or equal to the upper limit value, determining the preset heat management batch quantity as the required heat management batch quantity of all target energy storage modules; in the case that the first total quantity is greater than the upper limit value, determining the upper limit value as the batch energy storage module quantity under the first heat management batch, and determining a third total quantity of the remaining energy storage modules that are not managed by the first heat management batch among all target energy storage modules according to the first total quantity and the upper limit value; matching corresponding second heat management batches for the remaining energy storage modules according to the third total quantity and the upper limit value; and integrating the first batch quantity of the first heat management batch and the second batch quantity of the second heat management batch into the heat management batch quantity.

[0073] It should be noted that in the process of dividing the heat management batch, considering the efficiency of heat management control, in the case that the total refrigeration capacity provided by the plurality of liquid cooling modules is allowed, the first round of charging and discharging can make as many battery modules as possible complete charging and discharging as the criterion when determining the quantity matching relationship; for example, in an implementable manner, assuming that the target energy storage module quantity that can be managed by a single batch of heat management is 2, 4 or 6 under the quantity ratio represented by the quantity matching relationship between the energy storage modules and the liquid cooling modules, 6 target energy storage modules are directly selected as the batch energy storage modules of the first heat management batch, and the other 4 target energy storage modules are directly selected as the batch energy storage modules of the second heat management batch, and then after completing the first round of charging and discharging, the charging and discharging of the remaining target energy storage modules is completed according to the number of the remaining target energy storage modules that have not been charged and discharged and the heat dissipation quantity thereof, and the size of the refrigeration power; the preset heat management batch quantity can be 1, that is, when the maximum number of energy storage modules that can be refrigerated by all liquid cooling modules under a single heat management batch is greater than or equal to the first total quantity of all target energy storage modules, all target energy storage modules can complete heat management control in the same heat management batch, and when the maximum number of energy storage modules that can be refrigerated by all liquid cooling modules under a single heat management batch is less than the first total quantity of all target energy storage modules, the upper limit value is taken as the batch energy storage module quantity of the first heat management batch, so as to ensure that the first heat management batch can refrigerate as many target energy storage modules as possible.

[0074] As an example, by inputting the quantity matching relationship and the second total quantity into a second pre-designed calculation formula together, the upper limit value of the quantity of the energy storage modules that can be refrigerated by all the liquid cooling modules under a single thermal management batch is calculated; the first total quantity and the upper limit value are compared, and in the case of comparing that the first total quantity is less than or equal to the upper limit value, it is determined that the quantity of the thermal management batches required by all the target energy storage modules is 1; in the case of comparing that the first total quantity is greater than the upper limit value, the upper limit value is determined as the batch energy storage module quantity under the first thermal management batch, and according to the first total quantity and the upper limit value, a third total quantity of the remaining energy storage modules in all the target energy storage modules that are not managed by the first thermal management batch is determined; by comparing the size relationship between the third total quantity and the upper limit value, the corresponding second thermal management batch is matched for the remaining energy storage modules; the first batch quantity of the first thermal management batch and the second batch quantity of the second thermal management batch are summed to obtain the quantity of the thermal management batches required by all the target energy storage modules, wherein the first batch quantity is 1, and the second batch quantity can be 1, 2, and 3.

[0075] In the embodiment, by determining the upper limit value of the quantity of the energy storage modules that can be refrigerated by all the liquid cooling modules under a single thermal management batch, the division times of the thermal management batch can be controlled as a constraint in the thermal management control process, so that the quantity of the target energy storage modules that can be controlled in a single thermal management batch is saturated, and therefore, the control efficiency of the thermal management control of the energy storage system can be improved while laying a foundation for improving the effect of the thermal management control of the energy storage system.

[0076] In one embodiment, according to the batch division result and the quantity matching relationship, the corresponding batch liquid cooling module is matched for all the batch energy storage modules, including:

[0077] The adaptive characteristic information of each liquid cooling module for refrigerating the target energy storage module is obtained; according to the batch division result and the quantity matching relationship, the quantity of the liquid cooling module required by each batch energy storage module is determined; and according to the quantity of the liquid cooling module and the adaptive characteristic information, the corresponding batch liquid cooling module is selected for all the batch energy storage modules in all the liquid cooling modules.

[0078] It should be noted that in the process of determining the batch liquid cooling module corresponding to the different batches of energy storage modules, in addition to ensuring that the quantity of the liquid cooling module meets the refrigeration demand of the multiple target energy storage modules under different thermal management batches, the adaptation characteristic information of each liquid cooling module can also be obtained, and then the precise matching of the liquid cooling module and the energy storage module is completed depending on the adaptation characteristic information; the adaptation characteristic information represents the adaptation between the refrigeration characteristics of the liquid cooling module and the refrigeration demand of the target energy storage module, and the refrigeration characteristics include the position characteristics on the physical connection, the load characteristics in the running state, and the running characteristics on the refrigeration performance, and specifically can include at least one of the relative position information between all target energy storage modules and all liquid cooling modules, the current load information of the liquid cooling module, and the current performance state information of the liquid cooling module; the relative position information is used to reflect the distance between the liquid cooling module and the target energy storage module, and specifically can be the actual physical coordinates of the liquid cooling module, the current load information is used to reflect the running load of the liquid cooling module, and specifically can be the load rate, and the current performance state information is used to reflect the performance of the liquid cooling module, and specifically can be the usage frequency or the failure rate; for example, in an implementable manner, for the target energy storage module with urgent refrigeration demand, the liquid cooling module relatively closer to the target energy storage module can be selected as the batch liquid cooling module in all liquid cooling modules according to the relative position information between the target energy storage module and the liquid cooling module, for the target energy storage module with long refrigeration demand, the liquid cooling module with relatively better refrigeration performance can be selected as the batch liquid cooling module in all liquid cooling modules according to the current performance state information of all liquid cooling modules, and for the target energy storage module with strong refrigeration demand, the liquid cooling module with relatively less refrigeration load can be selected as the batch liquid cooling module in all liquid cooling modules according to the current load information of all liquid cooling modules.

[0079] As an example, the relative position information between each liquid cooling module and all target energy storage modules is obtained; the quantity of the liquid cooling module required by each batch energy storage module is determined with the batch division result and the quantity matching relationship as constraints; and the preset number of liquid cooling modules closest to the batch energy storage module and matching the quantity of the liquid cooling module are selected as the batch liquid cooling module from all liquid cooling modules according to all relative position information.

[0080] As another example, the current load information of all liquid cooling modules is obtained; the quantity of the liquid cooling module required by each batch energy storage module is determined with the batch division result and the quantity matching relationship as constraints; and the preset number of liquid cooling modules with relatively lowest load and matching the quantity of the liquid cooling module are selected as the batch liquid cooling module from all liquid cooling modules according to all current load information.

[0081] As another example, current performance state information of all liquid cooling modules is acquired; a quantity of liquid cooling modules required by each batch energy storage module is determined with the batch division result and the quantity matching relationship as constraints; and a preset number of liquid cooling modules with relatively optimal performance and matching the quantity of liquid cooling modules are selected from all liquid cooling modules as batch liquid cooling modules according to all current performance state information.

[0082] In this embodiment, in the process of matching batch liquid cooling modules to batch energy storage modules, the quantity of liquid cooling modules is set to ensure that the batch energy storage modules can be matched to corresponding batch liquid cooling modules in terms of quantity from all liquid cooling modules, and the adaptive characteristic information is set to ensure that the batch energy storage modules can be matched to adaptive batch liquid cooling modules in terms of quality from all liquid cooling modules, so that any target energy storage module can be cooled by the most suitable liquid cooling module, thereby laying a foundation for improving the effect of thermal management control of the energy storage system while improving the matching accuracy of liquid cooling modules and target energy storage modules in the thermal management control process.

[0083] In an implementable manner, the adaptive characteristic information includes relative position information, current load information and current performance state information; to comprehensively judge the matching degree between the liquid cooling module and the target energy storage module from multiple cooling dimensions, the corresponding evaluation weights can be adaptively set for different adaptive characteristic information, for example, in an implementable manner, the first evaluation weight corresponding to the relative position information can be set to 0.5, the second evaluation weight corresponding to the current load information can be set to 0.3, and the third evaluation weight corresponding to the current performance state information can be set to 0.2; and then the specific steps of selecting the corresponding batch liquid cooling module for all batch energy storage modules from all liquid cooling modules according to the quantity of liquid cooling modules and the adaptive characteristic information can include:

[0084] According to all relative position information, distances of all liquid cooling modules relative to the target energy storage module are sorted to obtain a distance sorting result, and first evaluation scores of all liquid cooling modules are generated according to the distance sorting result; according to all current load information, load conditions of all liquid cooling modules are sorted to obtain a load condition sorting result, and second evaluation scores of all liquid cooling modules are generated according to the load condition sorting result; according to all current performance state information, performance conditions of all liquid cooling modules are sorted to obtain a performance condition sorting result, and third evaluation scores of all liquid cooling modules are generated according to the performance condition sorting result; and through fusion of the first evaluation score, the second evaluation score, the third evaluation score, the first evaluation weight, the second evaluation weight and the third evaluation weight, a cooling adaptation degree of all liquid cooling modules to the target energy storage module is obtained, and a preset number of liquid cooling modules with relatively highest performance and matching the quantity of liquid cooling modules are selected from all liquid cooling modules as batch liquid cooling modules, wherein the formula of fusion is as follows:

[0085]

[0086] in, For cooling compatibility, As the first evaluation weight, As the first assessment score, As the second evaluation weight, This is the second assessment score. As the third evaluation weight, This is the third assessment score.

[0087] Understandably, in scenarios involving thermal management control of energy storage systems, the primary objective is to rapidly cool the target energy storage module. The load and performance of the liquid cooling module primarily affect its lifespan. Therefore, the distance between the liquid cooling module and the target energy storage module is the most crucial evaluation indicator for determining their compatibility. Consequently, a first evaluation weight can be set greater than the second and third evaluation weights. This allows for matching batches of liquid cooling modules to batches of energy storage modules, ensuring that the goal is to minimize the cooling medium's transport distance while also considering the impact of other factors on the compatibility between the liquid cooling module and the energy storage module. This approach further improves the accuracy of matching between the liquid cooling module and the target energy storage module during thermal management control.

[0088] In one embodiment, before dividing all target energy storage modules into thermal management batches based on the thermal matching relationship between all target energy storage modules and each liquid cooling module, and obtaining at least one batch of energy storage modules and corresponding batch of liquid cooling modules under a thermal management batch, the thermal management control method further includes:

[0089] Based on the current cooling power of each liquid cooling module at the ambient temperature, determine the total cooling power of all liquid cooling modules; determine the power ratio between the total heat release of all target energy storage modules and the total cooling power; map the power ratio to the thermal matching relationship between all target energy storage modules and each liquid cooling module.

[0090] It should be noted that in practical applications, since the cooling capacity of different liquid cooling modules may vary, before dividing the thermal management batches, the total cooling power and total heat release can be set, and the interpolation table of ambient temperature and the derating power of the liquid cooling module can be directly entered in advance. This way, when further determining the quantity matching relationship between energy storage modules and liquid cooling modules in a single thermal management batch, the corresponding thermal matching relationship in the interpolation table can be directly used as the quantity matching relationship, thereby reducing the complex calculation workload when determining the quantity matching relationship.

[0091] As an example, the current refrigeration power of each liquid cooling module at the ambient temperature value is summed to obtain the total refrigeration power of all liquid cooling modules; the heat dissipation of all target energy storage modules is summed to obtain the total heat dissipation of all target energy storage modules, and the total heat dissipation and the total refrigeration power are compared to obtain a power ratio; and the power ratio is mapped to the heat matching relationship between all target energy storage modules and each liquid cooling module.

[0092] In the embodiment, by calculating the total refrigeration power of all liquid cooling modules and the total heat dissipation of all target energy storage modules in advance, the heat matching relationship between all target energy storage modules and each liquid cooling module is determined, so that the quantity matching relationship can be directly determined by the heat matching relationship in subsequent heat management batch division, without the need for complex calculation, thereby laying a foundation for improving the division efficiency of heat management batch division.

[0093] In an implementable manner, with reference to Figure 4 , Figure 4 The flowchart for heat management control of the energy storage system, wherein it is first determined whether the ambient temperature value of the energy storage system is greater than a first preset temperature threshold, if greater than the first preset temperature threshold, the power ratio is calculated according to the refrigeration power and the heat dissipation at the ambient temperature value, so as to determine the quantity matching relationship between the energy storage modules and the liquid cooling modules in a single heat management batch, and then the number of target energy storage modules that can be controlled in a single heat management batch is saturated, so that as many target energy storage modules as possible complete the first round of charging and discharging, and the second round of charging and discharging of the remaining target energy storage modules is completed, and if less than or equal to the first preset temperature threshold, all energy storage modules of the energy storage system are controlled to normally charge and discharge.

[0094] In an implementable manner, in each heat management batch, the batch energy storage modules are controlled to charge and discharge, and in the charging and discharging process of the batch energy storage modules, the batch liquid cooling modules are controlled to start, and the state of the control valve between the batch energy storage modules and the batch liquid cooling modules is adjusted to cool the batch energy storage modules until all target energy storage modules complete heat management. The specific steps include:

[0095] In each thermal management batch, current operation state information of each target energy storage module in the batch energy storage module is obtained, wherein the current operation state information at least includes at least one of the current real-time temperature, the current charging and discharging power and the current health status of the target energy storage module; the target energy storage modules in the batch energy storage module are prioritized for thermal management according to the current operation state information, and a thermal management priority sorting result is obtained; and in the order of the thermal management priority of each target energy storage module in the thermal management priority sorting result, the target energy storage modules are sequentially executed: the target energy storage module is controlled for charging and discharging, and the target liquid cooling module corresponding to the target energy storage module is started in the charging and discharging process of the target energy storage module, and the target energy storage module is cooled by adjusting the state of the control valve between the target energy storage module and the target batch liquid cooling module until the thermal management of each target energy storage module in the batch energy storage module is completed; and the above steps are performed on the batch energy storage module of each thermal management batch until the thermal management of all target energy storage modules is completed.

[0096] In this way, before the thermal management control of the batch energy storage module of each thermal management batch, the thermal management priority of all target energy storage modules under the current thermal management batch is first determined based on the current operation state information of each target energy storage module in the batch energy storage module, and the thermal management control of all target energy storage modules is sequentially performed according to the thermal management priority until the thermal management of all target energy storage modules is completed, so that the occupation of the cooling resource by the target energy storage modules with low priority can be avoided, and the fine matching between the heat release demand of the target energy storage module and the cooling capacity of the liquid cooling module can be realized, and therefore the effect of the thermal management control of the energy storage system can be further improved.

[0097] In one embodiment, the control module includes a main control unit and a plurality of sub-control units, and the plurality of sub-control units and the plurality of liquid cooling branch pipelines are in one-to-one correspondence; in each thermal management batch, the batch energy storage module is controlled for charging and discharging, and the batch liquid cooling module is started in the charging and discharging process of the batch energy storage module, and the batch energy storage module is cooled by adjusting the state of the control valve between the batch energy storage module and the batch liquid cooling module, including:

[0098] In each thermal management batch, the main control unit sends a thermal management control instruction to the target sub-control unit corresponding to the liquid cooling branch pipeline to which the batch energy storage module belongs, wherein the thermal management control instruction includes a first control instruction, a second control instruction and a third control instruction; the target sub-control unit controls the batch energy storage module for charging and discharging based on the first control instruction; the target sub-control unit controls the batch liquid cooling module to start in the charging and discharging process of the batch energy storage module based on the first control instruction; and the target sub-control unit adjusts the control valve between the batch energy storage module and the batch liquid cooling module from a closed state to an open state based on the third control instruction to cool the batch energy storage module.

[0099] It should be noted that, in order to further improve the control effect of thermal management control, a main control unit and a sub-control unit can be arranged in the control module to realize centralized decision and distributed execution of thermal management control; the control module includes a main control unit and a plurality of sub-control units, and the plurality of sub-control units and the plurality of liquid cooling branch pipelines are one-to-one corresponding, wherein the main control unit can be referred to as a total control system, and the sub-control unit can be referred to as a sub-control system; the total control system can receive information sent by the sub-control system, detect the current ambient temperature value of the energy storage system, control the start-stop state of the battery module and the liquid cooling module in the energy storage system, and control the state of the control valve on the liquid cooling branch pipeline; it can be understood that different control logics can be executed through different control instructions, specifically, the first control instruction is used to control the batch energy storage module to charge and discharge, the second control instruction is used to control the batch liquid cooling module to start in the charging and discharging process of the batch energy storage module, and the third control instruction is used to control the state adjustment of the control valve between the batch energy storage module and the batch liquid cooling module.

[0100] As an example, in each thermal management batch, the main control unit sends a thermal management control instruction to the target sub-control unit corresponding to the liquid cooling branch pipeline to which the batch energy storage module belongs, wherein the thermal management control instruction includes a first control instruction, a second control instruction and a third control instruction; the target sub-control unit controls the batch energy storage module to charge and discharge under the first control instruction; the target sub-control unit controls the batch liquid cooling module to start in the charging and discharging process of the batch energy storage module under the second control instruction; and the target sub-control unit adjusts the control valve between the batch energy storage module and the batch liquid cooling module from a closed state to an open state under the third control instruction to cool the batch energy storage module.

[0101] In the embodiment, the main control unit and the plurality of sub-control units are arranged in the control module, and then the main control unit makes a decision of thermal management control and sends the first control instruction, the second control instruction and the third control instruction to the target sub-control unit corresponding to the liquid cooling branch pipeline to which the batch energy storage module belongs, so that the thermal management control is distributedly executed through multiple control instructions, thereby improving the control response speed to adapt to the real-time demand of thermal management control, and further improving the effect of thermal management control on the energy storage system.

[0102] In an implementable manner, the control valve includes a plurality of sub-control valves, any liquid cooling branch pipeline includes a plurality of liquid cooling sub-branch pipelines, the energy storage module includes a plurality of battery clusters, and the plurality of battery clusters and the plurality of liquid cooling sub-branch pipelines are one-to-one corresponding, and each liquid cooling sub-branch pipeline is provided with a sub-control valve;

[0103] The specific steps of the target sub-control unit adjusting the control valve between the batch energy storage module and the batch liquid cooling module from the closed state to the open state based on the third control instruction to cool the batch energy storage module include:

[0104] The target sub-control unit analyzes the third control instruction to obtain the target battery cluster in the batch energy storage module that needs to be heat managed, and adjusts the control valve between the batch energy storage module and the batch liquid cooling module from the closed state to the open state and adjusts the control valve of the target battery cluster belonging to the liquid cooling sub-branch pipeline from the closed state to the open state under the third control instruction to cool the batch energy storage module.

[0105] In this way, the target battery cluster in the local area of the batch energy storage module of the energy storage system can be cooled through the complex liquid cooling management design and the execution of the heat management control strategy, thereby avoiding the occurrence of differentiated heat risk conditions in the heat management control process, achieving the purpose of local precise temperature control of the energy storage system, and improving the control reliability of the heat management control of the energy storage system.

[0106] In one embodiment, the heat management control method further includes:

[0107] The real-time temperature value of the batch energy storage module in the charging and discharging process is obtained, the fourth control instruction is generated by the main control unit according to the second temperature difference between the real-time temperature value and the third preset temperature threshold, and the fourth control instruction is sent to the target sub-control unit by the main control unit, and the opening size of the control valve is adjusted by the target sub-control unit based on the fourth control instruction.

[0108] It should be noted that, in the process of heat management control of the energy storage system, in order to improve the control effect, whether the cooling effect of the energy storage system meets the standard can be determined based on the second temperature difference between the real-time temperature value of the batch energy storage module in the charging and discharging process and the first preset temperature threshold, so as to realize dynamic adjustment of the cooling capacity of the batch liquid cooling module by adjusting the opening size of the control valve, wherein the first preset temperature threshold, the second preset temperature threshold and the third preset temperature threshold are different, and the fourth control instruction includes the opening size increasing instruction and the opening size decreasing instruction.

[0109] As an example, the real-time temperature value of the batch energy storage module in the charging and discharging process is collected, the opening size increasing instruction is generated in the case that the second temperature difference is less than or equal to the first preset temperature difference threshold, and the opening size increasing instruction is sent to the sub-control unit by the main control unit, and the opening size of the control valve is adjusted from the third preset opening size to the fourth preset opening size by the target sub-control unit under the opening size increasing instruction, wherein the third preset opening size is less than the fourth preset opening size.

[0110] As another example, the real-time temperature values of the batch energy storage modules during the charging and discharging process are collected; in a case where the second temperature difference value is less than or equal to a first preset temperature difference threshold value, an opening degree reduction instruction is generated, and the opening degree reduction instruction is sent to the sub-control units by the main control unit; and the opening degree of the control valve is adjusted from the fifth preset opening degree to a sixth preset opening degree under the opening degree reduction instruction by the target sub-control unit, where the fifth preset opening degree is greater than the sixth preset opening degree.

[0111] In the present embodiment, in the process of thermal management control of the energy storage system, the fourth control instruction is generated according to the size of the second temperature difference value, and the opening degree of the control valve is dynamically adjusted by the target sub-control unit through the fourth control instruction, so as to dynamically adjust the refrigeration capacity of the batch energy storage module, thereby further improving the effect of thermal management control of the energy storage system.

[0112] In one embodiment, after obtaining the ambient temperature value of the energy storage system, the thermal management control method further comprises:

[0113] In a case where the ambient temperature value is less than or equal to the first preset temperature threshold value, the plurality of sub-control units are used to respectively perform thermal management control on the plurality of energy storage modules.

[0114] It should be noted that when the ambient temperature value is less than the first preset temperature threshold value, the main control unit does not act, and the control valves on all liquid cooling branch pipes are only connected to the corresponding liquid cooling modules and energy storage modules, while the water passages connected to other liquid cooling branch pipes are in a closed state. At this time, for any energy storage module, only the liquid cooling module belonging to the same liquid cooling branch pipe provides refrigeration capacity for the energy storage module, and all operations in the energy storage system are performed by the sub-control units. When the ambient temperature value is equal to the first preset temperature threshold value, the maximum refrigeration capacity of all liquid cooling modules is exactly equal to the average heat dissipation of all battery cells in the next charging and discharging cycle of the defined charging and discharging rate when the average temperature of the single battery cell is 35℃, that is, at this time, the battery cell temperature can be balanced at 35℃. Only when the ambient temperature value is greater than the first preset temperature threshold value, the battery cell temperature will continue to rise and exceed the safety value due to the derating of the liquid cooling unit, and the control module will trigger the above-mentioned thermal management control strategy.

[0115] As an example, in a case where the ambient temperature value is less than or equal to the first preset temperature threshold value, the plurality of sub-control units are used to respectively perform thermal management control on the plurality of energy storage modules. In this way, in a case where the energy storage system is in a low environmental thermal load, the thermal management control of the corresponding energy storage modules can be directly realized by the plurality of sub-control units, thereby improving the local thermal management control efficiency in the energy storage system.

[0116] In one embodiment, the thermal management control method further comprises:

[0117] In the case that the first current control instruction of any sub-control unit and the second current control instruction of the main control unit conflict, the first current control instruction is terminated, and the second current control instruction is taken as the valid current control instruction.

[0118] It should be noted that in the plurality of sub-control units, if the control instruction of any sub-control unit conflicts with the control instruction of the main control unit, the control instruction of the total control unit is executed preferentially.

[0119] As an example, in the case that the first timestamp of the first current control instruction and the second timestamp of the second current control instruction are the same, it is determined that the first current control instruction and the second current control instruction occur instruction conflict, the first current control instruction is terminated, and the second current control instruction is taken as the valid control instruction. In this way, in the case that the main control unit and the plurality of sub-control units occur instruction conflict, the execution order of the conflict instruction can be determined, thereby avoiding the problem of confusion of thermal management control of the energy storage system, so that the control safety of thermal management control of the energy storage system can be improved.

[0120] In an implementable manner, with reference to Figure 5 , Figure 5 Fig. 1 is a schematic diagram showing the local connection between the liquid cooling module and the energy storage module before starting the thermal management control, at this time, the control valve 52 on the liquid cooling branch pipeline 51 is in the closed state, the liquid cooling module 53 cannot cool the energy storage module 54, and the liquid cooling module 55 cannot cool the energy storage module 56; with reference to Figure 6 , Figure 6 Fig. 2 is a schematic diagram showing the local connection between the liquid cooling module and the energy storage module after starting the thermal management control, at this time, the control valve on the liquid cooling branch pipeline 61 is in the open state, the liquid cooling module 62 and the liquid cooling module 63 can simultaneously cool the energy storage module 64; it can be understood that the liquid cooling branch pipeline 51 and the liquid cooling branch pipeline 61 refer to different liquid cooling branch pipelines, the energy storage module 54, the energy storage module 56 and the energy storage module 64 refer to different energy storage modules, and the liquid cooling module 53, the liquid cooling module 55, the liquid cooling module 62 and the liquid cooling module 63 refer to different liquid cooling modules, any liquid cooling module can include a refrigerator, a compressor, a throttling element and a plate heat exchanger (which can be referred to as a plate exchanger), etc., the thermal management module of the energy storage system can also include a water pump (driving cooling liquid circulation) and a heating element (low-temperature auxiliary heating) in addition to the liquid cooling module.

[0121] It should be understood that although the steps in the flowcharts involved in the above embodiments are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other orders. Moreover, at least some of the steps in the flowcharts involved in the above embodiments can include multiple steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but can be alternately executed with at least some of the other steps or steps or stages in other steps.

[0122] In an exemplary embodiment, as shown in Figure 7 A thermal energy storage system is provided, comprising a control module, a plurality of liquid cooling modules, a plurality of thermal energy storage modules, and a liquid cooling pipeline module, wherein the liquid cooling pipeline module comprises a liquid cooling main pipeline and a plurality of liquid cooling branch pipelines, the plurality of liquid cooling modules are connected in parallel through the liquid cooling main pipeline, each liquid cooling module is connected one-to-one with the plurality of thermal energy storage modules through the plurality of liquid cooling branch pipelines, and each liquid cooling branch pipeline is provided with a control valve; wherein the control module comprises an acquisition unit 401, an identification unit 402, a division unit 403, and a thermal management unit 404:

[0123] The acquisition unit 401 is configured to acquire an ambient temperature value of the thermal energy storage system at present;

[0124] The identification unit 402 is configured to identify at least one target thermal energy storage module that needs to be thermally managed among all the thermal energy storage modules in a case where the ambient temperature value is greater than a first preset temperature threshold.

[0125] The division unit 403 is configured to divide the thermal management batches of all the target thermal energy storage modules according to the thermal matching relationship between all the target thermal energy storage modules and each liquid cooling module, to obtain batch thermal energy storage modules and corresponding batch liquid cooling modules under at least one thermal management batch, wherein the thermal matching relationship represents the matching condition between the heat dissipation capacity of the target thermal energy storage module and the refrigeration capacity of the liquid cooling module.

[0126] The thermal management unit 404 is configured to control the batch thermal energy storage modules in each thermal management batch to charge and discharge, and to control the batch liquid cooling modules to start and to refrigerate the batch thermal energy storage modules by adjusting the state of the control valve between the batch thermal energy storage modules and the batch liquid cooling modules during the charging and discharging process of the batch thermal energy storage modules, until the thermal management of all the target thermal energy storage modules is completed.

[0127] Based on the same inventive concept, the embodiment of the present application also provides a computer device for implementing the thermal management control method described above. The computer device can be a terminal, and its internal structure diagram can be as shown in Figure 8 The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner. The wireless manner can be achieved through WIFI, mobile cellular network, near field communication (NFC) or other technologies. The computer program is executed by the processor to implement a thermal management control method. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer overlaid on the display screen, or a key, trackball or touchpad arranged on the shell of the computer device, or an external keyboard, touchpad or mouse, etc.

[0128] Those skilled in the art can understand that Figure 8 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0129] In one embodiment, a computer device is also provided, including a memory and a processor, the memory storing a computer program, and the processor implementing the steps in the above method embodiments when executing the computer program.

[0130] In one embodiment, a computer readable storage medium is provided, which stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0131] In one embodiment, a computer program product is provided, including a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0132] It should be noted that the information (including but not limited to adaptation feature information, current running state information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of related data need to comply with relevant regulations.

[0133] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments of each method. In the embodiments provided in the present application, any reference to memory, database or other medium can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., without being limited thereto.

[0134] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described above, however, any combination of these technical features is deemed to be within the scope of the present application.

[0135] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A thermal management control method, characterized by, The application is applied to an energy storage system, the energy storage system comprising a control module, a plurality of liquid cooling modules, a plurality of energy storage modules and a liquid cooling pipeline module, wherein the liquid cooling pipeline module comprises a liquid cooling main pipeline and a plurality of liquid cooling branch pipelines, the plurality of liquid cooling modules are connected in parallel through the liquid cooling main pipeline, each liquid cooling module is connected to the plurality of energy storage modules one by one through the plurality of liquid cooling branch pipelines, and a control valve is arranged on each liquid cooling branch pipeline; the thermal management control method comprises the following steps: obtaining an ambient temperature value of the energy storage system; in a case where the ambient temperature value is greater than a first preset temperature threshold, identifying at least one target energy storage module requiring thermal management in all energy storage modules; according to a thermal matching relationship between all target energy storage modules and each liquid cooling module, performing thermal management batch division on the all target energy storage modules to obtain batch energy storage modules in at least one thermal management batch and corresponding batch liquid cooling modules, wherein the thermal matching relationship represents a matching condition between heat release capacity of the target energy storage module and refrigeration capacity of the liquid cooling module; in each thermal management batch, performing charge and discharge control on the batch energy storage modules, and in the process of charge and discharge of the batch energy storage modules, controlling the batch liquid cooling modules to start, and performing refrigeration on the batch energy storage modules by adjusting the state of the control valve between the batch energy storage modules and the batch liquid cooling modules until the thermal management of the all target energy storage modules is completed.

2. The thermal management control method of claim 1, wherein, Each of the energy storage modules comprises a plurality of battery clusters; the step of identifying at least one target energy storage module requiring thermal management in all energy storage modules comprises the following steps: for any energy storage module, in a case where the average temperature value of the energy storage module is less than a second preset temperature threshold, obtaining current temperature values corresponding to a plurality of battery clusters in the energy storage module respectively; according to a plurality of current temperature values, determining a temperature difference extreme value of each energy storage module and a first temperature difference value between adjacent battery clusters in each energy storage module; in a case where the temperature difference extreme value is greater than a first preset temperature difference threshold and there is at least one group of adjacent battery clusters with a first temperature difference value greater than a second preset temperature difference threshold, identifying the energy storage module as a target energy storage module requiring thermal management.

3. The thermal management control method of claim 1, wherein, The step of dividing the all target energy storage modules into batch energy storage modules in at least one thermal management batch according to the thermal matching relationship between the all target energy storage modules and each liquid cooling module comprises the following steps: obtaining a first total number of the all target energy storage modules and a second total number of all liquid cooling modules; determining a quantity matching relationship between energy storage modules and liquid cooling modules in a single thermal management batch according to the thermal matching relationship; according to the quantity matching relationship, the first total number and the second total number, identifying a required thermal management batch quantity of the all target energy storage modules; according to the quantity matching relationship and the thermal management batch quantity, dividing the all target energy storage modules into batch energy storage modules in at least one thermal management batch to obtain a batch division result; According to the batch division result and the quantity matching relationship, corresponding batch liquid cooling modules are matched for all batch energy storage modules.

4. The thermal management control method of claim 3, wherein, The identifying the required heat management batch quantity of the all target energy storage modules according to the quantity matching relationship, the first total quantity and the second total quantity comprises: According to the quantity matching relationship and the second total quantity, an upper limit value of the number of energy storage modules that can be refrigerated by the all liquid cooling modules under a single heat management batch is determined; In the case that the first total quantity is less than or equal to the upper limit value, a preset heat management batch quantity is determined as the required heat management batch quantity of the all target energy storage modules; In the case that the first total quantity is greater than the upper limit value, the upper limit value is determined as the batch energy storage module quantity under the first heat management batch, and a third total quantity of the remaining energy storage modules in the all target energy storage modules that are not managed by the first heat management batch is determined according to the first total quantity and the upper limit value; According to the third total quantity and the upper limit value, corresponding second heat management batches are matched for the remaining energy storage modules; The first batch quantity of the first heat management batch and the second batch quantity of the second heat management batch are integrated as the heat management batch quantity.

5. The thermal management control method of claim 3, wherein, The matching corresponding batch liquid cooling modules for all batch energy storage modules according to the batch division result and the quantity matching relationship comprises: Obtaining adaptive characteristic information of each liquid cooling module for refrigerating the target energy storage modules; According to the batch division result and the quantity matching relationship, determining the required liquid cooling module quantity of each batch energy storage module; According to the liquid cooling module quantity and the adaptive characteristic information, corresponding batch liquid cooling modules are selected for the all batch energy storage modules in the all liquid cooling modules.

6. The thermal management control method of claim 5, wherein, The adaptive characteristic information at least includes at least one of relative position information between the all target energy storage modules and the all liquid cooling modules, current load information of the liquid cooling module and current performance state information of the liquid cooling module.

7. The thermal management control method of claim 1, wherein, Before the heat management batch division of the all target energy storage modules according to the heat matching relationship between the all target energy storage modules and each liquid cooling module, the heat management control method further comprises: According to the current refrigeration power of each liquid cooling module at the ambient temperature value, the total refrigeration power of all liquid cooling modules is determined; The power ratio between the total heat dissipation quantity of the all target energy storage modules and the total refrigeration power is determined; The power ratio is mapped as the heat matching relationship between the all target energy storage modules and each liquid cooling module.

8. The thermal management control method of claim 1, wherein, The control module comprises a main control unit and a plurality of sub-control units, the plurality of sub-control units and the plurality of liquid cooling branch pipelines are in one-to-one correspondence; the charge and discharge control of the batch energy storage module is performed in each heat management batch, and the batch liquid cooling module is controlled to start in the charge and discharge process of the batch energy storage module, and the batch energy storage module is refrigerated by adjusting the state of the control valve between the batch energy storage module and the batch liquid cooling module, comprising: In each heat management batch, the main control unit sends a heat management control instruction to a target sub-control unit corresponding to the liquid cooling branch pipeline to which the batch energy storage module belongs, wherein the heat management control instruction comprises a first control instruction, a second control instruction and a third control instruction; The target sub-control unit controls the batch energy storage module to charge and discharge based on the first control instruction; The target sub-control unit controls the batch liquid cooling module to start in the charge and discharge process of the batch energy storage module based on the first control instruction; The target sub-control unit adjusts the control valve between the batch energy storage module and the batch liquid cooling module from a closed state to an open state based on the third control instruction, and refrigerates the batch energy storage module.

9. The thermal management control method of claim 8, wherein, The heat management control method further comprises: Obtaining a real-time temperature value of the batch energy storage module in the charge and discharge process; The main control unit generates a fourth control instruction according to a second temperature difference between the real-time temperature value and a third preset temperature threshold, and sends the fourth control instruction to the target sub-control unit through the main control unit; The target sub-control unit adjusts the opening size of the control valve based on the fourth control instruction.

10. The thermal management control method of claim 8, wherein, After obtaining the current ambient temperature value of the energy storage system, the heat management control method further comprises: In the case where the ambient temperature value is less than or equal to the first preset temperature threshold, the plurality of sub-control units perform heat management control on the plurality of energy storage modules respectively.

11. The thermal management control method of claim 8, wherein, The heat management control method further comprises: In the case where the first current control instruction of any sub-control unit and the second current control instruction of the main control unit conflict, the first current control instruction is terminated, and the second current control instruction is taken as an effective current control instruction.

12. An energy storage system characterized by, The energy storage system comprises a control module, a plurality of liquid cooling modules, a plurality of energy storage modules and a liquid cooling pipeline module, wherein the liquid cooling pipeline module comprises a liquid cooling main pipeline and a plurality of liquid cooling branch pipelines, the plurality of liquid cooling modules are connected in parallel through the liquid cooling main pipeline, each liquid cooling module is connected in one-to-one correspondence with the plurality of energy storage modules through the plurality of liquid cooling branch pipelines, and a control valve is arranged on each liquid cooling branch pipeline; The control module is configured to: Acquire an ambient temperature value at which the energy storage system currently locates; in the case of determining that the ambient temperature value is greater than a first preset temperature threshold, identify at least one target energy storage module requiring thermal management among all energy storage modules; according to a thermal matching relationship between all target energy storage modules and each liquid cooling module, divide the thermal management batches of the all target energy storage modules to obtain batch energy storage modules and corresponding batch liquid cooling modules under at least one thermal management batch, wherein the thermal matching relationship represents a matching condition between heat release capacity of the target energy storage module and refrigeration capacity of the liquid cooling module; in each thermal management batch, control the charge and discharge of the batch energy storage modules, and in the process of charge and discharge of the batch energy storage modules, control the batch liquid cooling modules to start, and through adjusting the state of a control valve between the batch energy storage modules and the batch liquid cooling modules, refrigerate the batch energy storage modules until the thermal management of the all target energy storage modules is completed.

Images