Thermal management control method and energy storage system

Abstract

The application relates to a heat management control method and an energy storage system. The method comprises the following steps: acquiring an ambient temperature value of the energy storage system; identifying at least one target energy storage module requiring heat management from all energy storage modules under the condition that the ambient temperature value is greater than a first preset temperature threshold; dividing the heat management batches of all target energy storage modules according to the heat 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 heat management batch; performing charge and discharge control on the batch energy storage modules in each heat management batch; starting the batch liquid cooling modules in the charge and discharge process of the batch energy storage modules; adjusting the state of a control valve between the batch energy storage modules and the batch liquid cooling modules to perform refrigeration on the batch energy storage modules until the heat management of all target energy storage modules is completed. The system can improve the heat management control effect of the energy storage system.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, 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 Technology

[0002] With the continuous development of 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 energy storage systems, which can realize bidirectional conversion and efficient storage of electrical energy. However, energy storage cells generate heat during charging and discharging. Therefore, in order to ensure that the energy storage cells can be maintained within the operating temperature range, an external cooling system is needed to perform thermal management and control of the energy storage system.

[0003] Currently, in the process of thermal management control of energy storage systems, the cooling system usually cools the energy storage system through a fixed refrigeration cycle. However, because the refrigeration cycle is easily affected by fluctuations in ambient temperature, the actual cooling capacity of the cooling system cannot match its set cooling capacity. This can easily lead to a decrease in the cooling capacity of the cooling system or overload of the cooling system compressor. Therefore, the current thermal management control of energy storage systems is ineffective. Summary of the Invention

[0004] Therefore, it is necessary to provide a thermal management control method, energy storage system, computer equipment, computer-readable storage medium, and computer program product that improves the thermal management control effect of energy storage systems in response to the above-mentioned technical problems.

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

[0006] Obtain the current ambient temperature value of the energy storage system;

[0007] If the ambient temperature value is determined to be greater than the first preset temperature threshold, at least one target energy storage module that requires thermal management is identified among all energy storage modules.

[0008] Based on the thermal matching relationship between all target energy storage modules and each of the liquid cooling modules, the target energy storage modules are divided into thermal management batches to obtain at least one batch of energy storage modules and corresponding batch of liquid cooling modules under thermal management batches. The thermal matching relationship characterizes the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module.

[0009] In each thermal management batch, the batch energy storage module is charged and discharged, and during the charging and discharging process of the batch energy storage module, the batch liquid cooling module is started, 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, until all target energy storage modules complete thermal management.

[0010] Secondly, this application provides an energy storage system, which includes a control module, multiple liquid cooling modules, multiple energy storage modules, and a liquid cooling pipeline module. The liquid cooling pipeline module includes a main liquid cooling pipeline and multiple liquid cooling branch pipelines. The multiple liquid cooling modules are connected in parallel through the main liquid cooling pipeline. Each liquid cooling module is connected to the multiple energy storage modules one-to-one through the multiple liquid cooling branch pipelines. Each liquid cooling branch pipeline is equipped with a control valve.

[0011] The control module is configured as follows:

[0012] The system acquires the current ambient temperature of the energy storage system; if the ambient temperature is greater than a first preset temperature threshold, it identifies at least one target energy storage module requiring thermal management among all energy storage modules; based on the thermal matching relationship between all target energy storage modules and each liquid cooling module, it divides all target energy storage modules into thermal management batches, obtaining at least one batch of energy storage modules and corresponding batch of liquid cooling modules under each thermal management batch, wherein the thermal matching relationship characterizes the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module; in each thermal management batch, it performs charge and discharge control on the batch energy storage module, and during the charge and discharge process of the batch energy storage module, it controls the start-up of the batch liquid cooling module, and cools 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, until all target energy storage modules complete thermal management.

[0013] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0014] The system acquires the current ambient temperature of the energy storage system; if the ambient temperature is greater than a first preset temperature threshold, it identifies at least one target energy storage module requiring thermal management among all energy storage modules; based on the thermal matching relationship between all target energy storage modules and each liquid cooling module, it divides all target energy storage modules into thermal management batches, obtaining at least one batch of energy storage modules and corresponding batch of liquid cooling modules under each thermal management batch, wherein the thermal matching relationship characterizes the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module; in each thermal management batch, it performs charge and discharge control on the batch energy storage module, and during the charge and discharge process of the batch energy storage module, it controls the start-up of the batch liquid cooling module, and cools 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, until all target energy storage modules complete thermal management.

[0015] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0016] The system acquires the current ambient temperature of the energy storage system; if the ambient temperature is greater than a first preset temperature threshold, it identifies at least one target energy storage module requiring thermal management among all energy storage modules; based on the thermal matching relationship between all target energy storage modules and each liquid cooling module, it divides all target energy storage modules into thermal management batches, obtaining at least one batch of energy storage modules and corresponding batch of liquid cooling modules under each thermal management batch, wherein the thermal matching relationship characterizes the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module; in each thermal management batch, it performs charge and discharge control on the batch energy storage module, and during the charge and discharge process of the batch energy storage module, it controls the start-up of the batch liquid cooling module, and cools 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, until all target energy storage modules complete thermal management.

[0017] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, performs the following steps:

[0018] The system acquires the current ambient temperature of the energy storage system; if the ambient temperature is greater than a first preset temperature threshold, it identifies at least one target energy storage module requiring thermal management among all energy storage modules; based on the thermal matching relationship between all target energy storage modules and each liquid cooling module, it divides all target energy storage modules into thermal management batches, obtaining at least one batch of energy storage modules and corresponding batch of liquid cooling modules under each thermal management batch, wherein the thermal matching relationship characterizes the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module; in each thermal management batch, it performs charge and discharge control on the batch energy storage module, and during the charge and discharge process of the batch energy storage module, it controls the start-up of the batch liquid cooling module, and cools 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, until all target energy storage modules complete thermal management.

[0019] The aforementioned thermal management control method deploys a control module, multiple liquid cooling modules, multiple energy storage modules, and a liquid cooling pipeline module in the energy storage system. The liquid cooling pipeline module includes a main liquid cooling pipeline and multiple branch liquid cooling pipelines. Multiple liquid cooling modules are connected in parallel via the main liquid cooling pipeline, and each liquid cooling module and each energy storage module are connected in series via a branch liquid cooling pipeline. Each branch liquid cooling pipeline is equipped with a control valve. The system then acquires the current ambient temperature of the energy storage system in real time. If the ambient temperature exceeds a first preset temperature threshold, at least one target energy storage module requiring thermal management is identified among all energy storage modules. Based on the thermal matching relationship between the target energy storage module and each liquid cooling module, all target energy storage modules are divided into thermal management batches, resulting in at least one batch of energy storage modules and corresponding batch liquid cooling modules. The thermal matching relationship characterizes the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module. Finally, in each thermal management batch, the batch energy storage module is charged and discharged, and during the charging and discharging process of the batch energy storage module, the batch liquid cooling module is activated. The system cools the batch energy storage modules by adjusting the control valves between the batch energy storage modules and the batch liquid cooling modules until all target energy storage modules complete thermal management. When the ambient temperature of the energy storage system is determined to be too high, the system actively identifies the target energy storage module requiring thermal management. Based on the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module, the system actively enhances the cooling capacity for the target energy storage module by adjusting the control valves of the corresponding liquid cooling module and energy storage module. This achieves real-time matching of the cooling capacity of multiple liquid cooling modules with the heat release capacity of the target energy storage module, ensuring thermal balance during the charging and discharging process of the energy storage system, rather than relying solely on a fixed cooling capacity. Therefore, it overcomes the technical defect that the actual cooling capacity of the cooling system cannot match its set cooling capacity due to the susceptibility of the cooling cycle to ambient temperature fluctuations, leading to a decrease in cooling capacity or compressor overload. Thus, it improves the effectiveness of thermal management control of the energy storage system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart illustrating a thermal management control method in one embodiment;

[0022] Figure 2 This is a schematic diagram showing the connection of multiple battery modules in a thermal management control method of one embodiment;

[0023] Figure 3 This is a flowchart illustrating the thermal management control method in another embodiment;

[0024] Figure 4 This is a schematic diagram of the process of thermal management control of an energy storage system in another embodiment;

[0025] Figure 5 This is a partial connection diagram between the liquid cooling module and the energy storage module before the start of thermal management control in another embodiment of the thermal management control method.

[0026] Figure 6 This is a partial connection diagram between the liquid cooling module and the energy storage module after the thermal management control method is activated in another embodiment.

[0027] Figure 7 This is a schematic diagram of the energy storage system in one embodiment;

[0028] Figure 8 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0029] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the invention will be thorough and complete.

[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 invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0031] It is understood that the terms "first," "second," etc., used in this invention may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this invention, a first temperature difference may be referred to as a second temperature difference, and similarly, a second temperature difference may be referred to as 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 is understood that the term "connection" in the following embodiments should be understood as "connection" or "communication connection" if the connected circuits, modules, units, etc. have electrical signal or data transmission between them.

[0033] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0034] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that terms such as “comprising / including” or “equipped with” specify the presence of the stated features, integrals, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integrals, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0035] First, it should be understood that an energy storage system is a complete equipment system integrating energy storage carriers, control and protection units, and auxiliary devices to realize the storage, conversion, and on-demand release of electrical energy. Specifically, it may include a PCS (Power Conversion System), battery modules, an EMS (Energy Management System), a BMS (Battery Management System), and heat dissipation devices. During the operation of an energy storage system, heat is generated due to energy conversion and internal impedance. If the temperature is not controlled or runs away, it may lead to reduced cell efficiency, shortened lifespan, or thermal runaway, directly affecting the safety, lifespan, and operating efficiency of the energy storage system. Therefore, an external cooling system is usually used for thermal management control of the energy storage system to ensure that the battery cells within the system can be maintained within the operating temperature range. Currently, cooling systems typically use a fixed refrigeration cycle to cool the energy storage system. Specifically, a compressor first compresses a low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant, which then enters a cooling system... After passing through the condenser, the refrigerant transforms into a medium-temperature, high-pressure liquid state. It then undergoes pressure reduction via an expansion valve, becoming a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant enters the evaporator to absorb heat from the energy storage system, subsequently transforming into a low-temperature, low-pressure gaseous state, and then re-enters the next cycle. This continuous process of removing heat from the energy storage system achieves cooling. However, this cooling method is susceptible to ambient temperature fluctuations. For example, in high ambient temperatures, the actual cooling capacity of the cooling system may not match its set cooling capacity, leading to reduced cooling capacity and compressor overload. This negatively impacts the energy storage system's operating efficiency, lifespan, and operational stability. Therefore, a thermal management control method that can improve the effectiveness of thermal management control for energy storage systems is urgently needed.

[0036] In one embodiment, such as Figure 1As shown, a thermal management control method is provided. This embodiment uses the application of this method to an energy storage system as an example. The energy storage system includes a control module, multiple liquid cooling modules, multiple energy storage modules, and a liquid cooling pipeline module. The control module is the functional carrier for thermal management control of the energy storage system, and may specifically include a microprocessor, a programmable logic controller, and a control board. The liquid cooling module is the functional carrier for absorbing and transferring the heat generated by the energy storage modules, and may specifically be a liquid cooling unit, which may include a compressor, a cooler, a throttling element, and an evaporator. The energy storage module is the functional carrier for storing energy in the energy storage system, and may specifically be a battery module, which may include... The system includes battery cells, cell support structures, connecting components, and data acquisition components. The liquid-cooled pipeline module is the functional carrier responsible for the circulation and distribution of the cooling medium in the energy storage system, specifically including transport components, control components, and sealing components. The liquid-cooled pipeline module includes a main liquid-cooled pipeline and multiple branch liquid-cooled pipelines. Multiple liquid-cooled modules are connected in parallel through the main liquid-cooled pipeline, and each liquid-cooled module is connected to multiple energy storage modules one-to-one through multiple branch liquid-cooled pipelines. Each branch liquid-cooled pipeline is equipped with a control valve, which can be a two-way valve, three-way valve, four-way valve, or ball valve. The control module deploys an acquisition unit, an identification unit, a segmentation unit, and a thermal management unit. The acquisition unit... The system is used to obtain the current ambient temperature value of the energy storage system. The identification unit is used to identify at least one target energy storage module requiring thermal management among all energy storage modules when the ambient temperature value is greater than a first preset temperature threshold. The segmentation unit is used to segment 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, obtaining at least one batch of energy storage modules and corresponding batches of liquid cooling modules under each thermal management batch. The thermal matching relationship characterizes the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module. The thermal management module is used to perform thermal management on the batch of energy storage modules in each thermal management batch. The method involves controlling the charging and discharging of batch energy storage modules, and during the charging and discharging process of these modules, controlling the start-up of batch liquid cooling modules. By adjusting the state of the control valves between the batch energy storage modules and the batch liquid cooling modules, cooling is achieved for the batch energy storage modules until all target energy storage modules complete thermal management. Furthermore, through information interaction between the acquisition unit, identification unit, division unit, and thermal management unit, the cooling capacity of the target energy storage modules can be proactively enhanced. This achieves real-time matching of the cooling capacity of multiple liquid cooling modules to the heat release capacity of the target energy storage modules, thereby ensuring the thermal balance of the energy storage system during charging and discharging. Therefore, it effectively manages and controls the thermal management of the energy storage system. In this embodiment, the method includes the following steps:

[0037] Step 202: Obtain the current ambient temperature value of the energy storage system.

[0038] It should be noted that energy storage modules, as the basic energy units of energy storage systems, can be integrated into complete energy storage systems through multi-level integration. Specifically, an energy storage module can be composed of multiple secondary batteries connected in a certain way, including series and parallel connections. Secondary batteries refer to rechargeable batteries, such as lithium-ion batteries. In one feasible approach, an ambient temperature sensor can be deployed outside the energy storage system to collect data. It is understood that since the energy storage system continuously generates heat during operation, the current ambient temperature can be used as a basis for determining whether thermal management control of the energy storage system is necessary. For example, if the ambient temperature is higher than the battery's optimal operating temperature of 28°C, the energy storage system's natural heat dissipation capacity is limited, and the heat generated by the energy storage system will accumulate internally. If thermal management control is not implemented, the battery temperature may rise above the safe temperature threshold.

[0039] As an example, step 202 includes: during the normal charging and discharging process of all energy storage modules in the energy storage system, periodically collecting multiple real-time temperature values ​​of the energy storage system, averaging the multiple real-time temperature values, and obtaining the current ambient temperature value of the energy storage system.

[0040] Step 204: If the ambient temperature value is determined to be greater than the first preset temperature threshold, identify at least one target energy storage module that needs thermal management among all energy storage modules.

[0041] It should be noted that the first preset temperature threshold can be set according to requirements, and can be denoted as... The optimal operating temperature of the battery cell can be set as a first preset temperature threshold. Specifically, the optimal operating temperature of the battery cell can be any temperature value within the temperature range of 25~35℃, such as 25℃, 30℃, or 35℃. After obtaining the ambient temperature value, the ambient temperature value can be compared with the first preset temperature threshold to determine the current thermal balance capability of the energy storage system. It is understood that when 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 derating of the liquid cooling module. Therefore, it is necessary to identify the target energy storage module that needs thermal management among all energy storage modules. The number of target energy storage modules can be one or more.

[0042] It should be noted that in an energy storage system, multiple energy storage modules can be marked based on their spatial location. For example, in one feasible approach, assuming the energy storage module is a battery module, refer to... Figure 2 , Figure 2To illustrate the connection of multiple battery modules, the diagram shows battery module 1, battery module 2, ..., battery module m-1, battery module m arranged sequentially from top to bottom. Each battery module includes n battery clusters, and each battery cluster includes n battery packs, where m and n are positive integers. It is understood that the marking rules for each battery pack can be customized as needed; for example, the marking rules can be from left to right or from right to left. In this way, each battery pack in the multiple battery modules of the energy storage system has an independent identifier. For example, the first... Battery module battery pack 1-1, first battery module battery pack 1-2, first battery module battery pack 1-n, second battery module battery pack 1-1, and second battery module battery pack 1-2, etc.; in this way, all energy storage modules in the energy storage system can have an identification, which makes it easier for the control module to identify the target energy storage module that needs thermal management; for example, in one feasible method, assuming there are 5 energy storage modules in total, the total number of energy storage modules that need thermal management can be set to 3, then the 3 energy storage modules with the highest temperature can be selected as target energy storage modules.

[0043] As an example, step 204 includes: comparing the ambient temperature value with a first preset temperature threshold; if the ambient temperature value is found to be greater than the first preset temperature threshold, collecting the corresponding first temperature value of each of all energy storage modules; comparing all the first temperature values ​​with the safe operating temperature threshold; and taking the energy storage module corresponding to the first temperature value that is found to be greater than the safe operating temperature threshold as the target energy storage module.

[0044] As another example, step 204 includes: comparing the ambient temperature value with a first preset temperature threshold; if the ambient temperature value is greater than the first preset temperature threshold, collecting the second temperature value corresponding to each of the energy storage modules; sorting the thermal management priority of all energy storage modules according to all the second temperature values ​​to obtain the thermal management priority sorting result; and selecting at least one energy storage module with the highest priority in the thermal management priority sorting result as the target energy storage module.

[0045] It is understandable that both the first and second temperature values ​​can characterize the average temperature of the energy storage module, which can be specifically calculated based on the actual temperature of each battery cell fed back by the temperature sensors deployed on the energy storage module.

[0046] In one feasible approach, the ambient temperature value is compared with a first preset temperature threshold. If the ambient temperature value is less than or equal to the first preset temperature threshold, the process can return to the execution step: obtaining the current ambient temperature value of the energy storage system and controlling all energy storage modules to perform normal charging and discharging.

[0047] Step 206: Based on the thermal matching relationship between all target energy storage modules and each liquid cooling module, divide all target energy storage modules into thermal management batches to obtain at least one batch of energy storage modules and corresponding batch of liquid cooling modules under thermal management batch. The thermal matching relationship characterizes the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module.

[0048] It should be noted that, to achieve precise matching between the heat dissipation requirements and supply within the energy storage system, after identifying all target energy storage modules, thermal management batches can be established for each module. For example, in different application scenarios, the number of target energy storage modules requiring thermal management may be random, while the number of liquid-cooled modules is usually fixed, and each liquid-cooled module has an upper limit on its cooling capacity. Therefore, thermal matching relationships are needed to ensure thermal management balance within each thermal management batch. A batch of energy storage modules represents the target energy storage modules within the same thermal management batch; specifically, there can be one or more. A batch of liquid-cooled modules is a liquid-cooled module matched with the batch of energy storage modules. It can be understood that the number of liquid-cooled modules in a batch must meet the total heat dissipation requirements of all target energy storage modules within that thermal management batch. Different liquid-cooled modules within the same thermal management batch can be the same or different. For example, liquid-cooled modules in a certain thermal management batch may include modules with a cooling capacity of [missing information]. The liquid cooling module A and the cooling power are Liquid-cooled module B; In one feasible approach, the thermal matching relationship can be a structured mapping table of the heat release characteristic parameters (e.g., heat release power) of all target energy storage modules and the cooling characteristic parameters (e.g., cooling power) of each liquid-cooled module. By integrating all structured mapping tables, the correspondence between the heat release capacity of all target energy storage modules and the cooling capacity of all liquid-cooled modules can be clarified, thereby enabling adaptive thermal management batch division. Assuming there are a total of One target energy storage module, Each liquid cooling module, through thermal matching, can... The target energy storage modules are divided into two thermal management batches. In the first thermal management batch, the following modules are used: Each liquid cooling module Cooling is performed on the target energy storage module. The total cooling capacity of each liquid cooling module is greater than or equal to The total heat dissipation capacity of each target energy storage module, and In the second thermal management batch, using Each liquid cooling module Cooling is performed on the target energy storage module. The total cooling capacity of each liquid cooling module is greater than or equal to The total heat dissipation capacity of each target energy storage module, and , .

[0049] As an example, step 206 includes: determining the total cooling power of all liquid cooling modules based on the thermal matching relationship between all target energy storage modules and each liquid cooling module; dividing all target energy storage modules into thermal management batches based on the total cooling power to obtain at least one batch of energy storage modules under thermal management batches; and matching the corresponding batch of liquid cooling modules to the batch of energy storage modules among all liquid cooling modules based on the total heat release power of the batch of energy storage modules.

[0050] Step 208: In each thermal management batch, charge and discharge control is performed on the batch energy storage module, and during the charge and discharge process of the batch energy storage module, the batch liquid cooling module is started. 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 until all target energy storage modules complete thermal management.

[0051] It should be noted that after the thermal management batches are divided, the control valve of the liquid cooling branch pipe of the liquid cooling module under the current thermal management batch can be adjusted through the control module to cool the energy storage module under the current thermal management batch. This allows the cooling capacity of multiple liquid cooling modules to be applied more precisely to the target energy storage module, thereby achieving a match between the heat release capacity of the target energy storage module and the cooling capacity of multiple liquid cooling modules. Specifically, the control valve between the batch energy storage module and the batch liquid cooling module can be adjusted from the closed state to the open state, or the control valve between the batch energy storage module and the batch liquid cooling module can be adjusted from the first preset opening degree to the second preset opening degree, wherein the first preset opening degree is smaller than the second preset opening degree.

[0052] As an example, step 208 includes: in each thermal management batch, sequentially performing charge and discharge control on all target energy storage modules in the batch energy storage modules, and for any target energy storage module in the batch energy storage modules, during the charge and discharge process of the target energy storage module, synchronously controlling the start of the liquid cooling module corresponding to the target energy storage module, and cooling 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 aforementioned thermal management control method deploys a control module, multiple liquid cooling modules, multiple energy storage modules, and a liquid cooling pipeline module in the energy storage system. The liquid cooling pipeline module includes a main liquid cooling pipeline and multiple branch liquid cooling pipelines. Multiple liquid cooling modules are connected in parallel via the main liquid cooling pipeline, and each liquid cooling module and each energy storage module are connected in series via a branch liquid cooling pipeline. Each branch liquid cooling pipeline is equipped with a control valve. The system then acquires the current ambient temperature of the energy storage system in real time. If the ambient temperature exceeds a first preset temperature threshold, at least one target energy storage module requiring thermal management is identified among all energy storage modules. Based on the thermal matching relationship between the target energy storage module and each liquid cooling module, all target energy storage modules are divided into thermal management batches, resulting in at least one batch of energy storage modules and corresponding batch liquid cooling modules. The thermal matching relationship characterizes the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module. Finally, in each thermal management batch, the batch energy storage module is charged and discharged, and during the charging and discharging process of the batch energy storage module, the batch liquid cooling module is activated. The system cools the batch energy storage modules by adjusting the control valves between the batch energy storage modules and the batch liquid cooling modules until all target energy storage modules complete thermal management. When the ambient temperature of the energy storage system is determined to be too high, the system actively identifies the target energy storage module requiring thermal management. Based on the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module, the system actively enhances the cooling capacity for the target energy storage module by adjusting the control valves of the corresponding liquid cooling module and energy storage module. This achieves real-time matching of the cooling capacity of multiple liquid cooling modules with the heat release capacity of the target energy storage module, ensuring thermal balance during the charging and discharging process of the energy storage system, rather than relying solely on a fixed cooling capacity. Therefore, it overcomes the technical defect that the actual cooling capacity of the cooling system cannot match its set cooling capacity due to the susceptibility of the cooling cycle to ambient temperature fluctuations, leading to a decrease in cooling capacity or compressor overload. Thus, it improves the effectiveness of thermal management control of the energy storage system.

[0054] In one embodiment, refer to Figure 3 Each energy storage module comprises multiple battery clusters; at least one target energy storage module requiring thermal management is identified among all energy storage modules, including:

[0055] Step 302: For any energy storage module, if the average temperature value of the energy storage module is detected to be less than the second preset temperature threshold, obtain the current temperature value corresponding to each of the multiple battery clusters in the energy storage module.

[0056] It should be noted that in the actual operation of an energy storage system, assessing the thermal risk of a single energy storage module using a single overall indicator can lead to delayed or ineffective thermal management decisions. For example, if there is a localized high temperature within the energy storage module, even if the overall temperature of the module is controllable, the module will still face thermal management risks. Therefore, to improve the accuracy of thermal management control of the energy storage system, indicators such as the current temperature of a local battery cluster and the temperature difference between adjacent battery clusters can be set to manage the local temperature within the energy storage module and the temperature between adjacent clusters within the module.

[0057] It should be noted that the energy storage module is composed of multiple battery clusters. A battery cluster refers to a battery sub-unit formed by multiple batteries connected in series or parallel. By deploying a temperature sensor in each battery cluster, the current temperature value of each battery cluster in the energy storage module can be collected. 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 one feasible method, assuming there are 8 battery clusters in a certain energy storage module, the average temperature value of the energy storage module is first calculated by randomly using the current temperature values ​​provided by 3 battery clusters. If the average temperature value is less than a second preset temperature threshold, the current temperature values ​​of each of the 8 battery clusters are then collected.

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

[0059] Step 304: Based on multiple current temperature values, determine the extreme temperature difference of each energy storage module and the first temperature difference between adjacent battery clusters in each energy storage module.

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

[0061] As an example, step 304 includes: for any energy storage module, selecting the highest current operating temperature and the lowest current operating temperature from multiple current temperature values, subtracting the highest current operating temperature from the lowest current operating temperature to obtain the extreme temperature difference value of each energy storage module, and subtracting the current temperature values ​​corresponding to adjacent battery clusters in the energy storage module to obtain multiple first temperature difference values.

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

[0063] It should be noted that by combining the extreme temperature difference and the first temperature difference, the temperature difference within a single battery module can be comprehensively judged. This allows energy storage modules with large overall and local temperature differences to be identified as target energy storage modules, thus enabling the matching of targeted thermal management needs for the energy storage system.

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

[0065] In one feasible approach, if the detected extreme temperature difference is less than or equal to a first preset temperature difference threshold, or if the detected extreme temperature difference is less than or equal to the first preset temperature difference threshold and the first temperature difference between all adjacent battery clusters is less than or equal to a second preset temperature difference threshold, then the energy storage module is not identified as a target energy storage module requiring thermal management.

[0066] In this embodiment, for energy storage modules with an average temperature value less than a second preset temperature threshold, the extreme temperature difference of the energy storage module is further obtained. The extreme temperature difference reflects the overall temperature difference within the energy storage module. A first temperature difference is also obtained, reflecting the local temperature difference within the energy storage module. By combining the extreme temperature difference and the first temperature difference, the temperature difference within the energy storage module is comprehensively determined, and energy storage modules with larger temperature differences are identified as target energy storage modules. This avoids situations where high-risk energy storage modules are not subject to appropriate thermal management control. Therefore, this approach lays the foundation for improving the effectiveness of thermal management control of the energy storage system while simultaneously improving the accuracy of thermal management control.

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

[0068] Obtain the first total number of all target energy storage modules and the second total number of all liquid-cooled modules; determine the quantity matching relationship between energy storage modules and liquid-cooled modules in a single thermal management batch based on the thermal matching relationship; identify the required thermal management batch quantity for all target energy storage modules based on the quantity matching relationship, the first total number, and the second total number; divide all target energy storage modules into batch energy storage modules of at least one thermal management batch based on the quantity matching relationship and the thermal management batch quantity, and obtain the batch division result; match the corresponding batch liquid-cooled modules for all batch energy storage modules based on the batch division result and the quantity matching relationship.

[0069] It should be noted that in energy storage systems, liquid-cooled modules are high-cost devices. Therefore, in practical applications, it is inevitable to balance the effectiveness and cost of thermal management control of the energy storage system. Thus, during the batch division of thermal management, the total heat release capacity and total cooling capacity of different thermal management batches can be quantified based on thermal matching relationships, thereby accurately controlling the supply and demand relationship between the target energy storage modules and liquid-cooled modules. The first total quantity of target energy storage modules and the second total quantity of liquid-cooled modules can be obtained by mapping the corresponding identification numbers. The quantity matching relationship is used to reflect the quantity relationship within a single thermal management batch, i.e., A thermal management module needs A liquid-cooled module; for example, in one implementable manner, the total heat dissipation power of all target energy storage modules C can be extracted through thermal matching relationships. The total cooling capacity of all liquid cooling modules D is The quantity matching relationship between the energy storage module and the liquid cooling module is as follows: The thermal management batch quantity represents the total number of batches requiring thermal management. For example, in one feasible approach, assume the initial total number of target energy storage modules is 10, the total number of all liquid-cooled modules is 3, and the quantity matching relationship is as follows: 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, identifying the required thermal management batch quantity for all target energy storage modules based on quantity matching relationships, a first total quantity, and a second total quantity includes: determining an upper limit value for the number of energy storage modules that all liquid-cooled modules can cool under a single thermal management batch, based on quantity matching relationships and a second total quantity; if the first total quantity is less than or equal to the upper limit value, determining a preset thermal management batch quantity as the required thermal management batch quantity for all target energy storage modules; if the first total quantity is greater than the upper limit value, determining the upper limit value as the batch quantity of energy storage modules under the first thermal management batch; and determining a third total quantity for the remaining energy storage modules not managed by the first thermal management batch among all target energy storage modules based on the first total quantity and the upper limit value; matching corresponding second thermal management batches for the remaining energy storage modules based on the third total quantity and the upper limit value; and integrating the first batch quantity of the first thermal management batch and the second batch quantity of the second thermal management batch into a thermal management batch quantity.

[0073] It should be noted that, in the process of dividing thermal management batches, considering the efficiency of thermal management control, when determining the quantity matching relationship, if the total cooling capacity provided by multiple liquid cooling modules allows, the criterion can be that the first round of charging and discharging can enable as many battery modules as possible to complete the charging and discharging. For example, in one feasible approach, assuming that the target energy storage module quantity for a single batch of thermal management is 2, 4, or 6 under the quantity ratio represented by the quantity matching relationship between energy storage modules and liquid cooling modules, then 6 target energy storage modules are directly selected as the batch energy storage modules for the first thermal management batch, and the other 4 target energy storage modules are selected as the batch energy storage modules for the second thermal management batch. Then, after completing the first round of charging and discharging, the remaining uncharged modules are further divided into batches. The number of target energy storage modules to be discharged, their heat release, and the cooling power are used to complete the charging and discharging of the remaining target energy storage modules. The preset thermal management batch quantity can be 1. That is, when the maximum number of energy storage modules that all liquid-cooled modules can cool in a single thermal management batch is greater than or equal to the first total number of all target energy storage modules, all target energy storage modules can complete thermal management control in the same thermal management batch. When the maximum number of energy storage modules that all liquid-cooled modules can cool in a single thermal management batch is less than the first total number of all target energy storage modules, the upper limit of the quantity is used as the batch quantity of the first thermal management batch, thereby ensuring that the first thermal management batch can cool as many target energy storage modules as possible.

[0074] As an example, by inputting the quantity matching relationship and the second total quantity into the second preset calculation formula, the upper limit of the number of energy storage modules that all liquid-cooled modules can cool under a single thermal management batch is calculated; the first total quantity and the upper limit value are compared, and if the first total quantity is less than or equal to the upper limit value, the thermal management batch quantity required for all target energy storage modules is determined to be 1; if 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 based on the first total quantity and the upper limit value, the third total quantity of the remaining energy storage modules 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 thermal management batch quantity required for all target energy storage modules, where the first batch quantity is 1, and the second batch quantity can be 1, 2, 3, etc.

[0075] In this embodiment, by determining the upper limit of the number of energy storage modules that all liquid cooling modules can cool in a single thermal management batch, the number of thermal management batch divisions can be constrained by the upper limit during the thermal management control process. This ensures that the number of target energy storage modules that can be thermally managed within a single thermal management batch is saturated. Therefore, this lays the foundation for improving the effect of thermal management control of the energy storage system, while simultaneously improving the control efficiency of thermal management control of the energy storage system.

[0076] In one embodiment, based on the batch division results and quantity matching relationships, corresponding batch liquid-cooled modules are matched for all batches of energy storage modules, including:

[0077] Obtain the adaptation feature information of each liquid cooling module for cooling the target energy storage module; determine the number of liquid cooling modules required for each batch of energy storage modules based on the batch division results and quantity matching relationship; select the corresponding batch liquid cooling modules for all batches of energy storage modules from all liquid cooling modules based on the number of liquid cooling modules and the adaptation feature information.

[0078] It should be noted that in determining the batch of liquid-cooled modules corresponding to different batches of energy storage modules, in addition to ensuring that the quantity of liquid-cooled modules meets the cooling requirements of multiple target energy storage modules under different thermal management batches, the adaptation characteristic information of each liquid-cooled module can also be obtained. Based on this adaptation characteristic information, precise matching between the liquid-cooled module and the energy storage module can be achieved. The adaptation characteristic information characterizes the compatibility between the cooling characteristics of the liquid-cooled module and the cooling requirements of the target energy storage module. Cooling characteristics include physical connection location characteristics, load characteristics under operating conditions, and operating characteristics in terms of cooling performance. Specifically, it can include at least one of the following: relative location information between all target energy storage modules and all liquid-cooled modules, current load information of the liquid-cooled module, and current performance status information of the liquid-cooled module. The relative location information reflects the distance between the liquid-cooled module and the target energy storage module, specifically the actual physical distance between the liquid-cooled module and the target energy storage module. Coordinates and current load information reflect the operating load of the liquid cooling module, specifically the load rate. Current performance status information reflects the performance of the liquid cooling module, specifically usage frequency or failure rate. For example, in one feasible approach, for a target energy storage module with urgent cooling needs, the liquid cooling module closer to the target energy storage module can be selected as the batch liquid cooling module based on the relative position information between the target energy storage module and the liquid cooling module. For a target energy storage module with long-term cooling needs, the liquid cooling module with better cooling performance can be selected as the batch liquid cooling module based on the current performance status information of all liquid cooling modules. For a target energy storage module with forced cooling needs, the liquid cooling module with a relatively lower cooling load can be selected as the batch liquid cooling module based on the current load information of all liquid cooling modules.

[0079] As an example, the relative position information between each liquid-cooled module and all target energy storage modules is obtained; the number of liquid-cooled modules required for each batch of energy storage modules is determined based on the batch division results and quantity matching relationship; according to all relative position information, a preset number of liquid-cooled modules that are closest to the batch of energy storage modules and match the quantity of liquid-cooled modules are selected from all liquid-cooled modules as the batch of liquid-cooled modules.

[0080] As another example, obtain the current load information of all liquid cooling modules; determine the number of liquid cooling modules required for each batch of energy storage modules based on the batch division results and quantity matching relationship; and select a preset number of liquid cooling modules with the lowest relative load and matching liquid cooling module quantity from all liquid cooling modules as the batch liquid cooling modules according to all current load information.

[0081] As another example, obtain the current performance status information of all liquid cooling modules; determine the number of liquid cooling modules required for each batch of energy storage modules based on the batch division results and quantity matching relationship; and select a preset number of liquid cooling modules with relatively optimal performance and matching liquid cooling module quantity from all liquid cooling modules as batch liquid cooling modules based on all current performance status information.

[0082] In this embodiment, during 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 module can be matched with the appropriate batch liquid cooling module from all liquid cooling modules. Furthermore, by setting adaptation feature information, the quality of the batch energy storage module can be matched with the appropriate batch liquid cooling module from all liquid cooling modules. This ensures that any target energy storage module can be cooled by the most suitable liquid cooling module. Therefore, while laying the foundation for improving the thermal management control effect of the energy storage system, the matching accuracy between the liquid cooling module and the target energy storage module during the thermal management control process is improved.

[0083] In one feasible approach, the adaptation feature information includes relative position information, current load information, and current performance status information. To comprehensively evaluate the matching degree between the liquid-cooled module and the target energy storage module from multiple cooling dimensions, corresponding evaluation weights can be adaptively set for different adaptation feature information. For example, in one feasible approach, 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 to 0.3, and the third evaluation weight corresponding to the current performance status information to 0.2. Furthermore, based on the quantity of liquid-cooled modules and the adaptation feature information, the specific steps for selecting the corresponding batch of liquid-cooled modules for all batches of energy storage modules from all liquid-cooled modules may include:

[0084] Based on all relative position information, the distances of all liquid cooling modules to the target energy storage module are sorted to obtain a distance sorting result. Based on the distance sorting result, a first evaluation score is generated for all liquid cooling modules. Based on all current load information, the load status of all liquid cooling modules is sorted to obtain a load status sorting result. Based on the load status sorting result, a second evaluation score is generated for all liquid cooling modules. Based on all current performance status information, the performance status of all liquid cooling modules is sorted to obtain a performance status sorting result. Based on the performance status sorting result, a third evaluation score is generated for all liquid cooling modules. By fusing the first evaluation score, second evaluation score, third evaluation score, first evaluation weight, second evaluation weight, and third evaluation weight, the cooling compatibility of all liquid cooling modules with the target energy storage module is obtained. Based on all cooling compatibility scores, a preset number of liquid cooling modules with the highest relative performance and matching quantity are selected as the batch of liquid cooling modules. The fusion formula is shown below:

[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 cooling power of each liquid cooling module at the ambient temperature is summed to obtain the total cooling power of all liquid cooling modules; the heat release of all target energy storage modules is summed to obtain the total heat release of all target energy storage modules; the total heat release is compared with the total cooling power to obtain the power ratio; the power ratio is mapped to the thermal matching relationship between all target energy storage modules and each liquid cooling module.

[0092] In this embodiment, by calculating the total cooling power of all liquid cooling modules and the total heat release of all target energy storage modules in advance, the thermal matching relationship between all target energy storage modules and each liquid cooling module is determined. This allows for the direct determination of quantity matching relationships during subsequent thermal management batch division without the need for complex calculations, thus laying a foundation for improving the efficiency of thermal management batch division.

[0093] In one feasible approach, refer to Figure 4 , Figure 4 This is a flowchart illustrating the thermal management control process for an energy storage system. First, it determines whether the ambient temperature of the energy storage system is greater than a first preset temperature threshold. If it is greater, the power ratio is calculated based on the cooling power and heat release at the ambient temperature. This determines the quantity matching relationship between energy storage modules and liquid cooling modules in a single thermal management batch, ensuring that the number of target energy storage modules capable of thermal management control within that batch is saturated. This allows as many target energy storage modules as possible to complete the first round of charging and discharging, and the remaining target energy storage modules to complete the second round of charging and discharging. If the temperature is less than or equal to the first preset temperature threshold, all energy storage modules in the energy storage system are controlled to charge and discharge normally.

[0094] In one feasible approach, the specific steps for controlling the charge and discharge of the batch energy storage modules in each thermal management batch, controlling the start-up of the batch liquid cooling module during the charge and discharge process of the batch energy storage modules, and cooling the batch energy storage modules by adjusting the state of the control valve between the batch energy storage modules and the batch liquid cooling module until all target energy storage modules complete thermal management include:

[0095] In each thermal management batch, the current operating status information of each target energy storage module in the batch is obtained. The current operating status information includes at least one of the following: the current real-time temperature, the current charge / discharge power, and the current health status of the target energy storage module. Based on the current operating status information, the thermal management priority of each target energy storage module in the batch is sorted to obtain a thermal management priority ranking result. According to the thermal management priority order of each target energy storage module in the thermal management priority ranking result, the following actions are performed on each target energy storage module in sequence: charge / discharge control of the target energy storage module, and during the charge / discharge process of the target energy storage module, control the start of the target liquid cooling module corresponding to the target energy storage module, and cool the target energy storage module by adjusting the state of the control valve between the target energy storage module and the target batch liquid cooling module, until each target energy storage module in the batch completes thermal management. The above steps are performed on the batch energy storage modules of each thermal management batch until all target energy storage modules complete thermal management.

[0096] In this way, before performing thermal management control on the batch energy storage modules of each thermal management batch, the thermal management priority of all target energy storage modules in the current thermal management batch is determined based on the current operating status information of each target energy storage module in the batch. Then, thermal management control is performed on all target energy storage modules in sequence according to the thermal management priority until all target energy storage modules have completed thermal management. This can avoid low-priority target energy storage modules from competing for cooling resources and achieve a fine match between the heat release demand of the target energy storage modules and the cooling capacity of the liquid cooling modules. Therefore, it can further improve the effect of thermal management control of the energy storage system.

[0097] In one embodiment, the control module includes a main control unit and multiple sub-control units, with each sub-control unit corresponding to a specific liquid-cooled branch pipe. In each thermal management batch, the module controls the charging and discharging of the batch energy storage module, and during the charging and discharging process of the batch energy storage module, controls the start-up of the batch liquid-cooled module, and cools the batch energy storage module by adjusting the state of the control valve between the batch energy storage module and the batch liquid-cooled module. This includes:

[0098] In each thermal management batch, the main control unit sends thermal management control commands to the target sub-control unit corresponding to the liquid cooling branch pipe of the batch energy storage module. The thermal management control commands include a first control command, a second control command, and a third control command. Based on the first control command, the target sub-control unit controls the batch energy storage module to charge and discharge. Based on the first control command, the target sub-control unit controls the batch liquid cooling module to start during the charge and discharge process of the batch energy storage module. Based on the third control command, the target sub-control unit adjusts the control valve between the batch energy storage module and the batch liquid cooling module from the closed state to the open state to cool the batch energy storage module.

[0099] It should be noted that, to further improve the control effect of thermal management, a main control unit and sub-control units can be set in the control module to achieve centralized decision-making and distributed execution of thermal management control. The control module includes a main control unit and multiple sub-control units, which correspond one-to-one with multiple liquid cooling branch lines. The main control unit can be called the overall control system, and the sub-control units can be called sub-control systems. The overall control system can receive information sent by the sub-control systems, detect the current ambient temperature of the energy storage system, control the start-up and shutdown status of the battery modules and liquid cooling modules in the energy storage system, and control the status of the control valves on the liquid cooling branch lines. It can be understood that different control logics can be executed through different control commands. Specifically, the first control command controls the batch energy storage modules to charge and discharge, the second control command controls the batch liquid cooling modules to start during the charge and discharge process of the batch energy storage modules, and the third control command controls the control valves between the batch energy storage modules and the batch liquid cooling modules to adjust their status.

[0100] As an example, in each thermal management batch, the main control unit sends thermal management control commands to the target sub-control unit corresponding to the liquid cooling branch pipe to which the batch energy storage module belongs. The thermal management control commands include a first control command, a second control command, and a third control command. The target sub-control unit controls the batch energy storage module to charge and discharge under the first control command. The target sub-control unit controls the batch liquid cooling module to start during the charge and discharge process of the batch energy storage module under the second control command. Under the third control command, the target sub-control unit adjusts the control valve between the batch energy storage module and the batch liquid cooling module from the closed state to the open state to cool the batch energy storage module.

[0101] In this embodiment, a main control unit and multiple sub-control units are set up within the control module. The main control unit then makes decisions on thermal management control and sends a first control command, a second control command, and a third control command to the target sub-control unit corresponding to the liquid-cooled branch pipe of the batch energy storage module. This distributed execution of thermal management control through multiple control commands improves the control response speed to meet the real-time requirements of thermal management control, thus further enhancing the effectiveness of thermal management control of the energy storage system.

[0102] In one feasible approach, the control valve includes multiple sub-control valves, any liquid-cooled branch line includes multiple liquid-cooled sub-branch lines, the energy storage module includes multiple battery clusters, the multiple battery clusters and the multiple liquid-cooled sub-branch lines correspond one-to-one, and each liquid-cooled sub-branch line is equipped with a sub-control valve.

[0103] Based on a third control command, 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. The specific steps for cooling the batch energy storage module include:

[0104] The target sub-control unit parses the third control command to obtain the target battery cluster within the batch energy storage module that requires thermal management. Under the third control command, the target sub-control unit 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 branch valve of the liquid cooling sub-branch to the open state, thereby cooling the batch energy storage module.

[0105] In this way, through the complex liquid cooling management design and the execution of thermal management control strategies, targeted cooling can be performed on target battery clusters in local areas within batch energy storage modules of the energy storage system. This avoids the occurrence of differential thermal risks during thermal management control and achieves the goal of localized and precise temperature control of the energy storage system. Therefore, the control reliability of thermal management control of the energy storage system is improved.

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

[0107] The system acquires the real-time temperature values ​​of the batch energy storage modules during the charging and discharging process; the main control unit generates a fourth control command based on the second temperature difference between the real-time temperature value and the third preset temperature threshold, and sends the fourth control command to the target sub-control unit; the target sub-control unit adjusts the opening degree of the control valve based on the fourth control command.

[0108] It should be noted that, in the process of thermal management control of the energy storage system, in order to improve the control effect, the cooling effect of the energy storage system can be judged based on the second temperature difference between the real-time temperature value of the batch energy storage modules during the charging and discharging process and the first preset temperature threshold. Thus, the cooling capacity of the batch liquid cooling modules can be dynamically adjusted by controlling the opening degree of the control valve. The first preset temperature threshold, the second preset temperature threshold, and the third preset temperature threshold are different. The fourth control command includes an opening increase command and an opening decrease command.

[0109] As an example, the real-time temperature values ​​of the batch energy storage modules during the charging and discharging process are collected; when the second temperature difference is less than or equal to the first preset temperature difference threshold, an opening increase command is generated and sent to the sub-control unit through the main control unit; under the opening increase command, the target sub-control unit adjusts the opening of the control valve from the third preset opening to the fourth preset opening, wherein the third preset opening is less than the fourth preset opening.

[0110] As another example, the real-time temperature values ​​of the batch energy storage modules during the charging and discharging process are collected; when the second temperature difference is less than or equal to the first preset temperature difference threshold, an opening reduction instruction is generated and sent to the sub-control unit through the main control unit; the target sub-control unit adjusts the opening of the control valve from the fifth preset opening to the sixth preset opening under the opening reduction instruction, wherein the fifth preset opening is greater than the sixth preset opening.

[0111] In this embodiment, during the thermal management control of the energy storage system, a fourth control command is generated based on the magnitude of the second temperature difference. The target sub-control unit then dynamically adjusts the opening of the control valve using the fourth control command, thereby achieving the goal of dynamically adjusting the cooling capacity of the batch of energy storage modules. Therefore, the effect of thermal management control of the energy storage system is further improved.

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

[0113] When the ambient temperature is determined to be less than or equal to the first preset temperature threshold, multiple energy storage modules are thermally managed and controlled by multiple sub-control units.

[0114] It should be noted that when the ambient temperature is less than the first preset temperature threshold, the main control unit does not take any action. The control valves on all liquid-cooled branch pipes are only connected to the corresponding liquid-cooled modules and energy storage modules, while the water passages connecting other liquid-cooled branch pipes are closed. At this time, for any energy storage module, only the liquid-cooled modules belonging to the same liquid-cooled branch pipe provide cooling capacity. All operations within the energy storage system are executed by the sub-control unit. When the ambient temperature is equal to the first preset temperature threshold, the maximum cooling capacity of all liquid-cooled modules is exactly equal to the average heat release of all battery cells in the next charge-discharge cycle of the energy storage system at an average cell temperature of 35°C. That is, the cell temperature can achieve thermal equilibrium at 35°C. Only when the ambient temperature is greater than the first preset temperature threshold will the cell temperature continue to rise and exceed the safety value due to the derating of the liquid-cooled unit, triggering the control module to execute the above-mentioned thermal management control strategy.

[0115] As an example, when the ambient temperature is determined to be less than or equal to a first preset temperature threshold, multiple sub-control units can be used to perform thermal management control on multiple energy storage modules separately. This allows for direct thermal management control of the corresponding energy storage modules by multiple sub-control units even when the energy storage system is under low ambient heat load, thereby improving the efficiency of local thermal management control within the energy storage system.

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

[0117] If a conflict occurs between the first current control command of any sub-control unit and the second current control command of the main control unit, the first current control command is terminated, and the second current control command is taken as the valid current control command.

[0118] It should be noted that if any control command of a sub-control unit conflicts with the control command of the main control unit, the control command of the main control unit shall be executed first.

[0119] As an example, if the first timestamp of the first current control command and the second timestamp of the second current control command are the same, it is determined that the first and second current control commands conflict. The first current control command is then terminated, and the second current control command is recognized as the valid control command. This allows for the clear determination of the execution order of conflicting commands when conflicts occur between the main control unit and multiple sub-control units, thereby avoiding confusion in the thermal management control of the energy storage system and improving the control security of thermal management control of the energy storage system.

[0120] In one feasible approach, refer to Figure 5 , Figure 5 To illustrate a partial connection diagram between the liquid cooling module and the energy storage module before the thermal management control is activated, at this time, the control valve 52 on the liquid cooling branch pipe 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; refer to Figure 6 , Figure 6 This diagram illustrates a partial connection between the liquid cooling module and the energy storage module after the thermal management control is activated. At this time, the control valve on the liquid cooling branch pipe 61 is open, and the liquid cooling modules 62 and 63 can simultaneously cool the energy storage module 64. It can be understood that the liquid cooling branch pipes 51 and 61 refer to different liquid cooling branch pipes, the energy storage modules 54, 56, and 64 refer to different energy storage modules, and the liquid cooling modules 53, 55, 62, and 63 refer to different liquid cooling modules. Any liquid cooling module may include a refrigerator, compressor, throttling element, and plate heat exchanger (which can be simply referred to as plate heat exchanger), etc. In addition to the liquid cooling modules, the thermal management module of the energy storage system may also include a water pump (driving coolant circulation) and a heating element (low-temperature auxiliary heating), etc.

[0121] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0122] In one exemplary embodiment, such as Figure 7 As shown, an energy storage system is provided, comprising a control module, multiple liquid-cooled modules, multiple energy storage modules, and a liquid-cooled piping module. The liquid-cooled piping module includes a main liquid-cooled pipeline and multiple branch liquid-cooled pipelines. The multiple liquid-cooled modules are connected in parallel via the main liquid-cooled pipeline, and each liquid-cooled module is connected to multiple energy storage modules one-to-one via multiple branch liquid-cooled pipelines. Each branch liquid-cooled pipeline is equipped with a control valve. The control module includes an acquisition unit 401, an identification unit 402, a division unit 403, and a thermal management unit 404.

[0123] Acquisition unit 401 is used to acquire the current ambient temperature value of the energy storage system;

[0124] The identification unit 402 is used to identify at least one target energy storage module that needs thermal management among all energy storage modules when the ambient temperature value is determined to be greater than a first preset temperature threshold.

[0125] The partitioning unit 403 is used to partition all target energy storage modules into thermal management batches according to the thermal matching relationship between all target energy storage modules and each liquid cooling module, so as to obtain at least one batch of energy storage modules and corresponding batch of liquid cooling modules under thermal management batch. The thermal matching relationship characterizes the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module.

[0126] The thermal management unit 404 is used to control the charging and discharging of the batch energy storage modules in each thermal management batch, and to control the start-up of the batch liquid cooling module during the charging and discharging process of the batch energy storage modules. It also cools the batch energy storage modules by adjusting the state of the control valve between the batch energy storage modules and the batch liquid cooling module until all target energy storage modules have completed thermal management.

[0127] Based on the same inventive concept, this application also provides a computer device for implementing the thermal management control method described above. This computer device can be a terminal, and its internal structure diagram can be as shown below. Figure 8 As shown, the computer device includes a processor, memory, input / output interfaces, a communication interface, a display unit, and an input device. The processor, memory, and input / output interfaces are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interfaces. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The input / output interfaces are used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements a thermal management control method. The display unit is used to form a visually visible image and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0128] Those skilled in the art will understand that Figure 8 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0129] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0130] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

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

[0132] It should be noted that the information (including but not limited to adaptation feature information, current operating status information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this 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 must comply with relevant regulations.

[0133] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application 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 memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic 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. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0134] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0135] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A thermal management control method, characterized in that, This invention is applied to an energy storage system, which includes a control module, multiple liquid-cooled modules, multiple energy storage modules, and a liquid-cooled piping module. The liquid-cooled piping module includes a main liquid-cooled pipeline and multiple branch liquid-cooled pipelines. The multiple liquid-cooled modules are connected in parallel through the main liquid-cooled pipeline. Each liquid-cooled module is connected to one of the multiple energy storage modules through the branch liquid-cooled pipelines. Each branch liquid-cooled pipeline is equipped with a control valve. The thermal management control method includes: Obtain the current ambient temperature value of the energy storage system; If the ambient temperature value is determined to be greater than the first preset temperature threshold, at least one target energy storage module that requires thermal management is identified among all energy storage modules. Based on the thermal matching relationship between all target energy storage modules and each of the liquid cooling modules, the target energy storage modules are divided into thermal management batches to obtain at least one batch of energy storage modules and corresponding batch of liquid cooling modules under thermal management batches. The thermal matching relationship characterizes the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module. In each thermal management batch, the batch energy storage module is charged and discharged, and during the charging and discharging process of the batch energy storage module, the batch liquid cooling module is started, 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 until all target energy storage modules complete thermal management. 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 to obtain at least one batch of batch energy storage modules and corresponding batch liquid cooling modules, the thermal management control method further includes: The total cooling power of all liquid cooling modules is obtained by summing the current cooling power of each liquid cooling module at the ambient temperature. The total heat release of all target energy storage modules is obtained by summing the heat release of all target energy storage modules. The total heat release is then compared with the total cooling power to obtain a power ratio. This power ratio is mapped to a thermal matching relationship between all target energy storage modules and each liquid cooling module. The number of liquid cooling modules in a single thermal management batch satisfies the total heat dissipation requirement of all target energy storage modules in that single thermal management batch. The liquid cooling resource supply and energy storage heat release requirement of a single thermal management batch are quantified through the quantity matching relationship between energy storage modules and liquid cooling modules in that single thermal management batch. This quantity matching relationship is determined based on the thermal matching relationship.

2. The thermal management control method according to claim 1, characterized in that, Each of the energy storage modules includes multiple battery clusters; identifying at least one target energy storage module requiring thermal management among all energy storage modules includes: For any of the energy storage modules, if the average temperature value of the energy storage module is detected to be less than the second preset temperature threshold, the current temperature value corresponding to each of the multiple battery clusters in the energy storage module is obtained. Based on multiple current temperature values, determine the extreme temperature difference of each energy storage module and the first temperature difference between adjacent battery clusters in each energy storage module. If the temperature difference extreme value is detected to be greater than the first preset temperature difference threshold, and there is a first temperature difference between at least one group of adjacent battery clusters that is greater than the second preset temperature difference threshold, the energy storage module is identified as a target energy storage module that needs thermal management.

3. The thermal management control method according to claim 1, characterized in that, The step of 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, to obtain at least one batch of energy storage modules and corresponding batch of liquid cooling modules under each thermal management batch, includes: Obtain the first total number of all target energy storage modules, and obtain the second total number of all liquid cooling modules; Based on the thermal matching relationship, the quantity matching relationship between energy storage modules and liquid cooling modules in a single thermal management batch is determined; Based on the quantity matching relationship, the first total quantity, and the second total quantity, identify the required thermal management batch quantity for all target energy storage modules; Based on the quantity 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, and the batch division result is obtained. Based on the batch division results and the quantity matching relationship, a corresponding batch liquid cooling module is matched for each batch of energy storage modules.

4. The thermal management control method according to claim 3, characterized in that, The step of identifying the required thermal management batch quantity for all target energy storage modules based on the quantity matching relationship, the first total quantity, and the second total quantity includes: Based on the quantity matching relationship and the second total quantity, determine the upper limit of the number of energy storage modules that all liquid cooling modules can cool in a single thermal management batch; If the first total quantity is less than or equal to the upper limit of the quantity, the preset thermal management batch quantity is determined as the thermal management batch quantity required for all target energy storage modules; If 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 the third total quantity of the remaining energy storage modules not managed by the first thermal management batch is determined according to the first total quantity and the upper limit value. Based on the third total quantity and the upper limit of the quantity, a 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 combined into the thermal management batch quantity.

5. The thermal management control method according to claim 3, characterized in that, The step of matching corresponding batch liquid-cooled modules for all batches of energy storage modules based on the batch division results and the quantity matching relationship includes: Obtain the adaptation feature information of each liquid cooling module for cooling the target energy storage module; Based on the batch division results and the quantity matching relationship, determine the amount of liquid-cooled modules required for each batch of energy storage modules; Based on the quantity of liquid-cooled modules and the adaptation feature information, select the corresponding batch of liquid-cooled modules for all batches of energy storage modules from all the liquid-cooled modules.

6. The thermal management control method according to claim 5, characterized in that, The adaptation feature information includes at least one of the following: the relative position information between all target energy storage modules and all liquid cooling modules, the current load information of the liquid cooling modules, and the current performance status information of the liquid cooling modules.

7. The thermal management control method according to claim 1, characterized in that, The control module includes a main control unit and multiple sub-control units, each sub-control unit corresponding to one of the multiple liquid cooling branch lines. In each thermal management batch, the charge and discharge control of the batch energy storage module is performed, and during the charge and discharge process of the batch energy storage module, the start-up of the batch liquid cooling module is controlled, 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. In each thermal management batch, the main control unit sends a thermal management control command to the target sub-control unit corresponding to the liquid cooling branch pipe to which the batch energy storage module belongs. The thermal management control command includes a first control command, a second control command, and a third control command. The target sub-control unit controls the batch energy storage modules to charge and discharge based on the first control command; Based on the first control command, the target sub-control unit controls the batch liquid cooling module to start during the charging and discharging process of the batch energy storage module; Based on the third control command, the target sub-control unit adjusts the control valve between the batch energy storage module and the batch liquid cooling module from the closed state to the open state to cool the batch energy storage module.

8. The thermal management control method according to claim 7, characterized in that, The thermal management control method further includes: Obtain the real-time temperature values ​​of the batch of energy storage modules during the charging and discharging process; The main control unit generates a fourth control command based on the second temperature difference between the real-time temperature value and the third preset temperature threshold, and sends the fourth control command to the target sub-control unit. The target sub-control unit adjusts the opening degree of the control valve based on the fourth control command.

9. The thermal management control method according to claim 7, characterized in that, After obtaining the current ambient temperature value of the energy storage system, the thermal management control method further includes: When the ambient temperature value is determined to be less than or equal to the first preset temperature threshold, the multiple sub-control units perform thermal management control on the multiple energy storage modules respectively.

10. The thermal management control method according to claim 7, characterized in that, The thermal management control method further includes: In the event of a conflict between a first current control command of any of the sub-control units and a second current control command of the main control unit, the first current control command is terminated, and the second current control command is taken as the valid current control command.

11. An energy storage system, characterized in that, The energy storage system includes a control module, multiple liquid cooling modules, multiple energy storage modules, and a liquid cooling pipeline module. The liquid cooling pipeline module includes a main liquid cooling pipeline and multiple liquid cooling branch pipelines. The multiple liquid cooling modules are connected in parallel through the main liquid cooling pipeline. Each liquid cooling module is connected to one of the multiple energy storage modules through the multiple liquid cooling branch pipelines. Each liquid cooling branch pipeline is equipped with a control valve. The control module is configured as follows: The system obtains the current ambient temperature value of the energy storage system; if the ambient temperature value is greater than a first preset temperature threshold, it identifies at least one target energy storage module that requires thermal management among all energy storage modules; based on the thermal matching relationship between all target energy storage modules and each liquid cooling module, it divides all target energy storage modules into thermal management batches, obtaining at least one batch of energy storage modules and corresponding batch of liquid cooling modules under each thermal management batch, wherein the thermal matching relationship characterizes the matching between the heat release capacity of the target energy storage module and the cooling capacity of the liquid cooling module; in each thermal management batch, the system... The batch energy storage modules are charged and discharged under control. During the charging and discharging process of the batch energy storage modules, the batch liquid cooling modules are started, and the batch energy storage modules are cooled 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 thermal management. 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 to obtain at least one batch of batch energy storage modules and corresponding batch liquid cooling modules under thermal management, the control module is further configured to: The total cooling power of all liquid cooling modules is obtained by summing the current cooling power of each liquid cooling module at the ambient temperature. The total heat release of all target energy storage modules is obtained by summing the heat release of all target energy storage modules. The total heat release is then compared with the total cooling power to obtain a power ratio. This power ratio is mapped to a thermal matching relationship between all target energy storage modules and each liquid cooling module. The number of liquid cooling modules in a single thermal management batch satisfies the total heat dissipation requirement of all target energy storage modules in that single thermal management batch. The liquid cooling resource supply and energy storage heat release requirement of a single thermal management batch are quantified through the quantity matching relationship between energy storage modules and liquid cooling modules in that single thermal management batch. This quantity matching relationship is determined based on the thermal matching relationship.

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