Intelligent temperature control device of energy storage system and energy storage system

Abstract

The invention relates to an intelligent temperature control device of an energy storage system and the energy storage system. The method comprises the steps of obtaining current temperature distribution information associated with an energy storage system, a current working state of the energy storage system, a historical temperature control strategy of the energy storage system and current temperature control resource regulation and control information, and identifying a temperature control starting time point of the energy storage system; generating a current temperature control regulation strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation and control information, and performing temperature control processing on the energy storage system based on the current temperature control regulation strategy when a temperature control starting time point is met to obtain new temperature distribution information of the energy storage system; new temperature control resource regulation and control information is collected again, the current temperature distribution information is replaced with the new temperature distribution information, the current temperature control resource regulation and control information is replaced with the new temperature control resource regulation and control information, the step of generating the current temperature control regulation strategy of the energy storage system is executed again, and intelligent temperature management can be executed on the energy storage system in the non-working state.

Description

[0001] This application is a divisional application filed in respect of the application with the application number: 202510113926X (Intelligent Temperature Control Method, Temperature Control Device, and Energy Storage System for Energy Storage Systems, application date: January 24, 2025). Technical Field

[0002] This application relates to the technical field of energy storage, and particularly to an intelligent temperature control device and an energy storage system for an energy storage system. Background Art

[0003] Temperature management of the battery cells in an energy storage system is crucial. The battery cells generate heat during the charge and discharge processes and require an effective cooling system to maintain their operating temperatures. If the temperature is not properly controlled, it will affect the efficiency and lifespan of the battery cells and may even lead to thermal runaway.

[0004] When using the immersion liquid cooling technology, immersion liquid cooling exchanges heat by directly contacting the battery cells and has good temperature control effects. However, when the system finishes charging and discharging and the liquid cooling unit stops working, if the ambient temperature is not suitable, the temperatures of the battery cells and the immersion liquid may deviate from the optimal storage temperature range. Moreover, both too high and too low ambient temperatures will cause fluctuations in the battery cell temperatures, thereby affecting the storage lifespan of the battery cells. Summary of the Invention

[0005] Based on this, in view of the above technical problems, it is necessary to provide an intelligent temperature control method, a temperature control device, and an energy storage system for an energy storage system that perform temperature management in a non-operating state.

[0006] In a first aspect, this application provides an intelligent temperature control method for an energy storage system, including:

[0007] Obtain the current temperature distribution information associated with the energy storage system, the current working state of the energy storage system, the historical temperature control strategy of the energy storage system, and the current temperature control resource regulation information, and identify the temperature control start time point of the energy storage system based on the historical temperature control strategy of the energy storage system and the current working state of the energy storage system;

[0008] Generate the current temperature control adjustment strategy for the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, and when the temperature control start time point is satisfied, perform temperature control processing on the energy storage system based on the current temperature control adjustment strategy to obtain the new temperature distribution information of the energy storage system;

[0009] Re - collect new temperature control resource regulation information, replace the current temperature distribution information with the new temperature distribution information, replace the current temperature control resource regulation information with the new temperature control resource regulation information, and return to execute the step of generating the current temperature control adjustment strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, until a stop temperature control instruction is received, and then stop the temperature control process of the energy storage system.

[0010] In one embodiment, identifying the temperature control start time point of the energy storage system based on the historical temperature control strategy of the energy storage system and the current working state of the energy storage system includes:

[0011] Identify the current execution status of the historical temperature control strategy, and when the current execution status is "executed", take the current time point as the temperature control start time point of the energy storage system;

[0012] Take the historical temperature control strategy as the temperature control adjustment strategy of the energy storage system, and execute the step of performing temperature control processing on the energy storage system based on the temperature control adjustment strategy when the temperature control start time point is met, to obtain the new temperature distribution information of the energy storage system;

[0013] When the current execution status is "not executed", judge whether the current working state of the energy storage system is a charge - discharge state, and when the current working state of the energy storage system is a charge - discharge state, take the change time point of the current working state of the energy storage system as the temperature control start time point of the energy storage system;

[0014] When the current working state of the energy storage system is not a charge - discharge state, take the current time point as the temperature control start time point of the energy storage system.

[0015] In one embodiment, generating the current temperature control adjustment strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information includes:

[0016] Based on the temperature information of the energy storage system, the temperature change trend of the energy storage system, the ambient temperature information associated with the energy storage system, and the ambient temperature change trend associated with the energy storage system, calculate the temperature control duration range corresponding to the energy storage system through the temperature control duration algorithm, and based on the temperature control duration range, screen the initial temperature control adjustment strategy matched by the energy storage system in the temperature control adjustment database;

[0017] Based on the temperature control resource regulation information, screen the current temperature control adjustment strategy of the energy storage system from each of the initial temperature control adjustment strategies matched by the energy storage system.

[0018] In one embodiment, the temperature control duration algorithm is as follows:

[0019]

[0020] where t is the temperature control duration; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion liquid; c co is the specific heat capacity of the immersion liquid; T avgcell is the average temperature of the battery cell; m cell is the mass of the battery cell; c cell is the specific heat capacity of the battery cell; t w (t) is the average temperature of the outer wall surface of the battery pack; t a is the ambient temperature; h is the ambient convective heat transfer coefficient; A is the total outer wall surface area of the battery pack; P is the temperature control power.

[0021] In one embodiment, screening the current temperature control adjustment strategy of the energy storage system from the initial temperature control adjustment strategies matched with the energy storage system based on the temperature control resource regulation information includes:

[0022] Identifying the current interval of the temperature control resource regulation information;

[0023] When the current interval is the target interval, determining the remaining duration of the target interval;

[0024] According to the remaining duration of the target interval, through the resource adaptation strategy, identifying the temperature control adjustment range corresponding to the remaining duration of the target interval, and identifying the initial temperature control rate range corresponding to each initial temperature control adjustment strategy, and the initial temperature control adjustment range corresponding to each initial temperature control adjustment strategy;

[0025] Based on the temperature control adjustment range, each initial temperature control rate range, and each initial temperature control adjustment range, screening the current temperature control adjustment strategy of the energy storage system from the initial temperature control adjustment strategies;

[0026] When the current interval is a non-target interval, performing temperature control processing on the energy storage system based on a preset temperature control adjustment strategy.

[0027] In one embodiment, the step of identifying the temperature control adjustment range corresponding to the remaining duration of the target interval through the resource adaptation strategy according to the remaining duration of the target interval includes:

[0028] Calculate the temperature control adjustment range corresponding to the remaining duration of the target interval according to the deviation value between the temperature information of the energy storage system and the preset temperature, and the deviation value between the ambient temperature information associated with the energy storage system and the preset temperature, and the temperature control rate range corresponding to the remaining duration of the target interval.

[0029] In one embodiment, the process of stopping the temperature control of the energy storage system until a stop temperature control instruction is received includes:

[0030] When the current working state of the energy storage system changes to the charge and discharge state, stop the temperature control process of the energy storage system;

[0031] When the ambient temperature information associated with the energy storage system reaches the preset temperature and a stop temperature control instruction is received, stop the temperature control process of the energy storage system;

[0032] And / or, in response to the upload operation of the stop temperature control instruction, stop the temperature control process of the energy storage system.

[0033] In one embodiment, after performing temperature control on the energy storage system based on the current temperature control adjustment strategy, identify the current interval of the temperature control resource regulation information, and at the change time point when the current interval changes to a non-target interval, change the current temperature control adjustment strategy to a preset temperature control adjustment strategy, and perform temperature control on the energy storage system based on the preset temperature control adjustment strategy.

[0034] In a second aspect, the present application provides an intelligent temperature control device for an energy storage system, the device includes:

[0035] An acquisition module, configured to acquire the current temperature distribution information associated with the energy storage system, the current working state of the energy storage system, the historical temperature control strategy of the energy storage system, and the current temperature control resource regulation information, and identify the temperature control start time point of the energy storage system based on the historical temperature control strategy of the energy storage system and the current working state of the energy storage system;

[0036] A generation module, configured to generate the current temperature control adjustment strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, and when the temperature control start time point is satisfied, perform temperature control on the energy storage system based on the current temperature control adjustment strategy to obtain the new temperature distribution information of the energy storage system;

[0037] The temperature control module is used to re - collect new temperature control resource regulation information, replace the current temperature distribution information with the new temperature distribution information, replace the current temperature control resource regulation information with the new temperature control resource regulation information, and return to execute the step of generating the current temperature control adjustment strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, until a stop temperature control instruction is received, and then stop the temperature control process of the energy storage system.

[0038] In one embodiment, the acquisition module is specifically used for:

[0039] Identify the current execution status of the historical temperature control strategy, and when the current execution status is "executed", use the current time point as the temperature control start time point of the energy storage system;

[0040] Use the historical temperature control strategy as the temperature control adjustment strategy of the energy storage system, and execute the step of performing temperature control processing on the energy storage system based on the temperature control adjustment strategy when the temperature control start time point is met, to obtain the new temperature distribution information of the energy storage system;

[0041] When the current execution status is "not executed", determine whether the current working status of the energy storage system is a charge - discharge state, and when the current working status of the energy storage system is a charge - discharge state, use the change time point of the current working status of the energy storage system as the temperature control start time point of the energy storage system;

[0042] When the current working status of the energy storage system is not a charge - discharge state, use the current time point as the temperature control start time point of the energy storage system.

[0043] In one embodiment, the generation module is specifically used for:

[0044] Based on the temperature information of the energy storage system, the temperature change trend of the energy storage system, the ambient temperature information associated with the energy storage system, and the ambient temperature change trend associated with the energy storage system, calculate the temperature control duration range corresponding to the energy storage system through the temperature control duration algorithm, and based on the temperature control duration range, screen the initial temperature control adjustment strategy matched by the energy storage system in the temperature control adjustment database;

[0045] Based on the temperature control resource regulation information, screen the current temperature control adjustment strategy of the energy storage system from each of the initial temperature control adjustment strategies matched by the energy storage system.

[0046] In one embodiment, the temperature control duration algorithm is:

[0047]

[0048] where t is the temperature control duration; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion liquid; c co is the specific heat capacity of the immersion liquid; T avgcell is the average temperature of the battery cell; m cell is the mass of the battery cell; c cell is the specific heat capacity of the battery cell; t w (t) is the average temperature of the outer wall surface of the battery pack; t a is the ambient temperature; h is the ambient convective heat transfer coefficient; A is the total area of the outer wall surface of the battery pack; P is the temperature control power.

[0049] In one embodiment, the generating module is specifically configured to:

[0050] Identify the current interval of the temperature control resource regulation information;

[0051] When the current interval is the target interval, determine the remaining duration of the target interval;

[0052] According to the remaining duration of the target interval, through the resource adaptation strategy, identify the temperature control adjustment range corresponding to the remaining duration of the target interval, and identify the initial temperature control rate range corresponding to each of the initial temperature control adjustment strategies and the initial temperature control adjustment range corresponding to each of the initial temperature control adjustment strategies;

[0053] Based on the temperature control adjustment range, each of the initial temperature control rate ranges, and each of the initial temperature control adjustment ranges, screen the current temperature control adjustment strategy of the energy storage system among the initial temperature control adjustment strategies;

[0054] When the current interval is a non-target interval, perform temperature control processing on the energy storage system based on a preset temperature control adjustment strategy.

[0055] In one embodiment, the generating module is specifically configured to:

[0056] The identifying the temperature control adjustment range corresponding to the remaining duration of the target interval according to the remaining duration of the target interval through the resource adaptation strategy includes:

[0057] According to the deviation value between the temperature information of the energy storage system and the preset temperature and the deviation value between the ambient temperature information associated with the energy storage system and the preset temperature, calculate the temperature control adjustment range corresponding to the remaining duration of the target interval based on the temperature control rate range corresponding to the remaining duration of the target interval.

[0058] In one embodiment, the temperature control module is specifically configured to:

[0059] When the current working state of the energy storage system changes to the charge-discharge state, stop the temperature control process of the energy storage system;

[0060] When the ambient temperature information associated with the energy storage system reaches a preset temperature and a stop temperature control instruction is received, stop the temperature control process of the energy storage system;

[0061] And / or, in response to the upload operation of the stop temperature control instruction, stop the temperature control process of the energy storage system.

[0062] In one embodiment, the generation module is specifically configured to:

[0063] After performing temperature control on the energy storage system based on the current temperature control adjustment strategy, identify the current interval of the temperature control resource regulation information, and at the change time point when the current interval changes to a non-target interval, change the current temperature control adjustment strategy to a preset temperature control adjustment strategy, and perform temperature control on the energy storage system based on the preset temperature control adjustment strategy.

[0064] In a third aspect, the present application provides an energy storage system, including a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the steps of the method described in the first aspect are implemented.

[0065] The intelligent temperature control method, temperature control device, and energy storage system of the above energy storage system. The method includes: obtaining the current temperature distribution information associated with the energy storage system, the current working state of the energy storage system, the historical temperature control strategy of the energy storage system, and the current temperature control resource regulation information, and identifying the temperature control start time point of the energy storage system based on the historical temperature control strategy of the energy storage system and the current working state of the energy storage system; generating the current temperature control adjustment strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, and when the temperature control start time point is met, performing temperature control processing on the energy storage system based on the current temperature control adjustment strategy to obtain the new temperature distribution information of the energy storage system; re-collecting the new temperature control resource regulation information, replacing the current temperature distribution information with the new temperature distribution information, replacing the current temperature control resource regulation information with the new temperature control resource regulation information, and returning to execute the step of generating the current temperature control adjustment strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, until the temperature control process of the energy storage system is stopped when a stop temperature control instruction is received. In this solution, by obtaining the current temperature distribution information, working state, historical temperature control strategy, and current temperature control resource regulation information of the energy storage system, and identifying the temperature control start time point based on the historical temperature control strategy and the current working state, it is possible to determine when to start the temperature control mechanism to avoid energy efficiency losses caused by starting too early or too late, and at the same time ensure that the energy storage system can be maintained within the optimal working temperature range under various working conditions, and temperature management can also be performed on the energy storage system in the non-working state, thereby extending the battery life of the energy storage system, improving the system efficiency, and reducing the risk of thermal runaway. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0067] Figure 1 It is a schematic flowchart of the intelligent temperature control method for the energy storage system in an embodiment;

[0068] Figure 2 It is a schematic flowchart of identifying the temperature control start time point of the energy storage system in an embodiment;

[0069] Figure 3 It is a schematic flowchart of generating the current temperature control adjustment strategy of the energy storage system in an embodiment;

[0070] Figure 4 It is a schematic flowchart of screening each initial temperature control adjustment strategy in an embodiment;

[0071] Figure 5 It is a structural block diagram of an intelligent temperature control device for an energy storage system in an embodiment;

[0072] Figure 6 It is an internal structure diagram of an energy storage system in an embodiment. Specific Embodiments

[0073] In order to make the objectives, technical solutions, and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0074] In an exemplary embodiment, as Figure 1 shown, an intelligent temperature control method for an energy storage system is provided. In this embodiment, this method is exemplified by being applied to a terminal. Among them, the terminal can be, but is not limited to, an energy storage system, a battery management system (Battery Management System, BMS), various personal computers, laptop computers, smartphones, tablet computers, Internet of Things devices, and portable wearable devices. The Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart in-vehicle devices, projection devices, etc. The portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. The head-mounted device can be a virtual reality (Virtual Reality, VR) device, an augmented reality (Augmented Reality, AR) device, smart glasses, etc. It can be understood that this method can also be applied to a server, and can also be applied to a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. The intelligent temperature control method for the energy storage system includes the following steps S110 to S130. Among them:

[0075] Step S110: Obtain the current temperature distribution information associated with the energy storage system, the current working state of the energy storage system, the historical temperature control strategy of the energy storage system, and the current temperature control resource regulation information, and identify the temperature control start time point of the energy storage system based on the historical temperature control strategy of the energy storage system and the current working state of the energy storage system;

[0076] In this embodiment, the energy storage system includes a plurality of immersion battery packs, temperature control devices (such as a liquid cooling circulation circuit and a liquid cooling unit) and immersion liquid. The battery packs are encapsulated with battery cells. The immersion battery packs are immersed in an insulating medium. The temperature control device includes a series-connected temperature controller. The energy storage system is associated with a number of temperature sensors for detecting the temperature of the energy storage system and the environment where the energy storage system is located. Among them, temperature sensors are evenly distributed on the outer surface and inner surface of the battery packs of the energy storage system, the surface of the battery cells, in the immersion liquid, and in the air environment around the energy storage system.

[0077] The terminal is communicatively connected to the immersion battery pack, the temperature control device, and the immersion liquid of the energy storage system respectively. The terminal is also communicatively connected to several temperature sensors associated with the energy storage system respectively.

[0078] The terminal obtains the current temperature distribution information associated with the energy storage system, the current working state of the energy storage system, the historical temperature control strategy of the energy storage system, and the current temperature control resource regulation information.

[0079] The current temperature distribution information associated with the energy storage system can reflect the real-time temperature conditions of various parts of the energy storage system and the surrounding environment. The current temperature distribution information associated with the energy storage system may include but is not limited to: the temperature information of the energy storage system, the temperature change trend of the energy storage system, the ambient temperature information associated with the energy storage system, and the ambient temperature change trend associated with the energy storage system. In this embodiment, the terminal can collect the real-time temperature data of important components of the energy storage system (such as the outer surface of the battery pack, the inner surface of the battery pack, the battery cells, the real-time temperature data of the immersion liquid) and the real-time temperature data of the environment associated with the energy storage in real time, and generate a temperature distribution map or a temperature matrix with time as the horizontal axis and temperature as the vertical axis to obtain the current temperature distribution information associated with the energy storage system.

[0080] The current working state of the energy storage system may include a charge-discharge state and a non-charge-discharge state.

[0081] The historical temperature control strategy of the energy storage system refers to whether the temperature control strategy has been executed on the current day of the energy storage system. The current temperature control resource regulation information may include but is not limited to: the electricity price policy of the current power grid, the electricity price range of the current power grid, and the remaining duration of the current electricity price range, etc. The electricity price of the current power grid may change due to policies, time, seasons, market demand, etc. The terminal obtains the current temperature control resource regulation information and can formulate a reasonable and economical current temperature control adjustment strategy according to the current temperature control resource regulation information.

[0082] The terminal identifies the temperature control start time point of the energy storage system based on the historical temperature control strategy of the energy storage system and the current working state of the energy storage system, so as to identify the most suitable temperature control start time point of the energy storage system in the current state. For example, when the temperature control strategy has not been executed on the current day of the energy storage system and the current working state of the energy storage system is not in the non-charge-discharge state, the temperature control start time point of the energy storage system can be identified.

[0083] In this embodiment, the terminal can analyze the historical temperature control strategy of the energy storage system and the current working state of the energy storage system using algorithm models (such as machine learning, deep learning, etc.), set the start condition for temperature control adjustment according to the output result of the algorithm model, and use the time point when the start condition for temperature control adjustment is reached as the temperature control start time point. The start condition for temperature control adjustment can be that the temperature of the battery cell reaches a certain threshold, etc., and combined with the current temperature control resource regulation information (such as the low electricity price period) to optimize the economy of temperature control adjustment and smooth the load curve.

[0084] Step S120: Generate the current temperature control adjustment strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, and when the temperature control start time point is met, perform temperature control processing on the energy storage system based on the current temperature control adjustment strategy to obtain the new temperature distribution information of the energy storage system;

[0085] In this embodiment, the terminal formulates the current temperature control adjustment strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information. The current temperature control adjustment strategy is formulated according to the energy storage system and the associated environmental information, combined with the electricity price policy, electricity price range, etc., to make full use of the low electricity price area, smooth the load curve, and improve the economy of intelligent temperature control. When the energy storage system meets the temperature control start time point, the corresponding temperature control resources are started according to the formulated current temperature control adjustment strategy, and the temperature change and temperature control resource status during the temperature control process are monitored in real time to ensure that the temperature control effect meets the expectations.

[0086] The terminal can determine the temperature thresholds associated with the energy storage system respectively according to the design and operation requirements of the energy storage system. The temperature thresholds associated with the energy storage system can include but are not limited to the safety temperature threshold of the battery pack, the safety temperature threshold of the battery cell, and the temperature threshold of the immersion liquid, etc. When the current temperature distribution information associated with the energy storage system reaches the temperature threshold, and combined with the electricity price policy and electricity price period of the current temperature control adjustment strategy, the current temperature control adjustment strategy is started in the low electricity price area. The terminal performs temperature management on the energy storage system according to the current temperature control adjustment strategy and detects the temperature change of the energy storage system in real time to obtain the new temperature distribution information of the energy storage system.

[0087] The terminal can compare the current temperature distribution information associated with the energy storage system that generates the current temperature control adjustment strategy of the energy storage system with the new temperature distribution information of the energy storage system, evaluate the temperature control effect of the current temperature control adjustment strategy, and adjust and optimize the current temperature control adjustment strategy according to the evaluation result. The terminal can also record the key data and information during the temperature control process to provide a reference for subsequent temperature management and system optimization.

[0088] Step S130: Re - collect new temperature control resource regulation information, replace the current temperature distribution information with the new temperature distribution information, replace the current temperature control resource regulation information with the new temperature control resource regulation information, and return to execute the step of generating the current temperature control adjustment strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, until a stop temperature control instruction is received, and then stop the temperature control process of the energy storage system.

[0089] In this embodiment, during the process of the terminal performing temperature management on the energy storage system according to the current temperature control adjustment strategy, the terminal obtains real - time temperature control resource regulation information. If the electricity price of the current power grid changes due to policies, time, seasons, market demand, etc., the terminal obtains the new temperature control resource regulation information after the change and replaces the current temperature control resource regulation information with the new temperature control resource regulation information.

[0090] During the process of the terminal performing temperature management on the energy storage system, the terminal obtains the new temperature distribution information of the energy storage system through the temperature sensors associated with the energy storage system, monitors the changes in the temperature associated with the energy storage system (including the temperature of the battery pack, the temperature of the battery cells, the temperature of the immersion liquid, and the temperature of the associated environment), and replaces the current temperature control resource regulation information with the new temperature control resource regulation information.

[0091] Based on the replaced current temperature control resource regulation information (updated) and the current temperature distribution information (updated), the terminal executes the step of generating the current temperature control adjustment strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, and updates the current temperature control adjustment strategy. According to the updated current temperature control adjustment strategy, the terminal performs temperature control processing on the energy storage system. During the temperature control process, the terminal regularly updates the current temperature control resource regulation information and the current temperature distribution information to adjust the temperature control strategy, so as to ensure that the temperature control process can continuously adapt to the changes in the system state and the external environment, and achieve an efficient and economic temperature control effect.

[0092] The above - mentioned intelligent temperature control method, temperature control device, and energy storage system of the energy storage system, by obtaining the current temperature distribution information, working state, historical temperature control strategy, and current temperature control resource regulation information of the energy storage system, identify the temperature control start time point based on the historical temperature control strategy and the current working state, so as to judge when to start the temperature control mechanism, avoid energy efficiency losses caused by starting too early or too late, and at the same time ensure that the energy storage system can be maintained within the optimal working temperature range under various working conditions, and can also perform temperature management on the energy storage system in the non - working state, thereby extending the service life of the battery cells of the energy storage system, improving the system efficiency, and reducing the risk of thermal runaway.

[0093] In an exemplary embodiment, such as Figure 2As shown, step S110 identifies the temperature control start time point of the energy storage system based on the historical temperature control strategy of the energy storage system and the current working state of the energy storage system, including steps S111 - S114:

[0094] Step S111: Identify the current execution status of the historical temperature control strategy, and when the current execution status is "executed", use the current time point as the temperature control start time point of the energy storage system;

[0095] In this embodiment, the terminal can look up whether there is a record of the execution of the temperature control strategy on the current day of the energy storage system by reading the working log or database of the energy storage system.

[0096] If the terminal finds a record of the execution of the temperature control strategy on the current day of the energy storage system, and the record shows that the temperature control strategy has been executed on the current day, then the current execution status is "executed", and step S112 is entered. At the current time point, the corresponding temperature control device is started, and temperature control is performed according to the historical temperature control strategy.

[0097] If the terminal does not find a record of the execution of the temperature control strategy on the current day of the energy storage system or the record shows that the temperature control strategy has not been executed on the current day, then the current execution status is "not executed", and step S113 is entered.

[0098] Step S112: Use the historical temperature control strategy as the temperature control adjustment strategy of the energy storage system, and perform the step of obtaining the new temperature distribution information of the energy storage system by performing temperature control processing on the energy storage system based on the temperature control adjustment strategy when the temperature control start time point is met;

[0099] In this embodiment, when the terminal has executed the temperature control strategy on the current day, the historical temperature control strategy is directly used as the temperature control adjustment strategy of the energy storage system (for example, the temperature control strategy executed last time by the energy storage system can be obtained), and when the temperature control start time point is met, the terminal performs temperature control on the energy storage system based on the historical temperature control strategy (such as the temperature control strategy executed last time). The terminal monitors the temperature change managed by the energy storage system and obtains the new temperature distribution information.

[0100] In this embodiment, the terminal can directly obtain the temperature control strategy executed last time from the working log or database of the energy storage system as the temperature control adjustment strategy of the energy storage system.

[0101] Step S113: When the current execution status is "not executed", determine whether the current working state of the energy storage system is a charge and discharge state, and when the current working state of the energy storage system is a charge and discharge state, use the change time point of the current working state of the energy storage system as the temperature control start time point;

[0102] In this embodiment, when the terminal does not execute the temperature control strategy on the same day, it determines the temperature control start time point according to the current working state of the energy storage system. The terminal obtains the current working state of the energy storage system and judges whether the energy storage system is in a charge / discharge state. If the energy storage system is in a charge / discharge state, the terminal takes the change time point of the current working state of the energy storage system as the temperature control start time point, that is, the terminal takes the time point when the current working state of the energy storage system changes from the charge / discharge state to a non-charge / discharge state (such as a standby state or a shutdown state) as the temperature control start time point.

[0103] If the current working state of the terminal energy storage system is not in a charge / discharge state (such as a standby state or a shutdown state), the terminal enters step S114.

[0104] Step S114: When the current working state of the energy storage system is not in a charge / discharge state, take the current time point as the temperature control start time point of the energy storage system.

[0105] In this embodiment, when the energy storage system of the terminal has neither executed the historical temperature control strategy nor is in a charge / discharge state, the terminal takes the current time point as the temperature control start time point of the energy storage system and executes the current temperature control adjustment strategy to manage the temperature of the energy storage system.

[0106] For an immersion-type energy storage system, after the energy storage system finishes charge / discharge, the temperature control device also stops working, but the ambient temperature still affects the temperature of the immersion liquid. When the ambient temperature is too high, even if the liquid cooling unit has stopped working, the temperature of the immersion liquid may still be relatively high. This may cause the temperature of the battery cells to continue to rise during the static state, thus exceeding the optimal storage temperature range. The too high temperature will accelerate the rate of the internal chemical reaction of the battery cells, resulting in a decline in the performance and a shortening of the lifespan of the battery cells. On the contrary, when the ambient temperature is too low, the temperature of the immersion liquid and the battery cells may drop to an excessively low level, which may also cause some materials inside the battery cells to deform or be damaged, thus affecting the performance and lifespan of the battery cells.

[0107] Based on the above solution, the terminal determines the temperature control start time point and temperature control strategy according to the current execution status of the historical temperature control strategy and the current working status of the energy storage system, which can ensure the effectiveness and economy of the temperature control strategy and reduce unnecessary temperature control operations at the same time. If the temperature control strategy has been executed on the same day, the energy storage system is subjected to temperature control processing based on the historical temperature control strategy. When the energy storage system has neither executed the historical temperature control strategy nor is in the charge and discharge state, the terminal executes the current temperature control adjustment strategy to manage the temperature of the energy storage system, which can effectively manage the temperature of the energy storage system in different states, so as to ensure that the battery cells operate within the optimal storage temperature range, extend the service life of the battery cells, improve the overall performance and reliability of the energy storage system, and at the same time ensure that the energy storage system can still maintain within the optimal storage temperature range in the non-charge and discharge state, further extending the service life of the battery cells and maintaining the stability of their performance.

[0108] In an exemplary embodiment, as Figure 3 shown, step S120 generates the current temperature control adjustment strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, including steps S121 - S122:

[0109] Step S121: Based on the temperature information of the energy storage system, the temperature change trend of the energy storage system, the ambient temperature information associated with the energy storage system, and the ambient temperature change trend associated with the energy storage system, through the temperature control duration algorithm, calculate the temperature control duration range corresponding to the energy storage system, and based on the temperature control duration range, screen the initial temperature control adjustment strategy matched by the energy storage system in the temperature control adjustment database;

[0110] In this embodiment, the terminal obtains the temperature information of the energy storage system, the temperature change trend of the energy storage system, the ambient temperature information associated with the energy storage system, and the ambient temperature change trend associated with the energy storage system based on the temperature distribution diagram or temperature matrix of the current temperature distribution information associated with the energy storage system.

[0111] The temperature information of the energy storage system at least includes the temperature of the outer surface of the battery pack, the temperature of the inner surface of the battery pack, the temperature of the battery cells, and the temperature of the immersion liquid. The temperature change trend of the energy storage system at least includes the temperature change trend of the outer surface of the battery pack (rising or falling), the temperature change trend of the inner surface of the battery pack, the temperature change trend of the battery cells, and the temperature change trend of the immersion liquid. The temperature of the outer surface of the battery pack can represent the thermal influence of the environment on the battery pack, the temperature of the inner surface of the battery pack reflects the heat generated by the battery cells and the internal heat dissipation situation, the battery cells are the core components of the energy storage system, and the temperature of the battery cells directly affects the charge and discharge efficiency, cycle life and safety of the energy storage system. The temperature of the immersion liquid can understand its heat dissipation effect on the battery cells.

[0112] The ambient temperature information associated with the energy storage system includes at least the temperature of the air environment around the energy storage system, and the ambient temperature change trend associated with the energy storage system includes at least the temperature change trend of the air environment around the energy storage system. The temperature of the environment where the energy storage system is located also affects the overall temperature distribution of the system. For example, both the temperature level and the heat transfer coefficient between the external air and the immersion liquid have a significant impact on the heat dissipation or heat preservation of the battery pack.

[0113] The terminal calculates the temperature control duration range corresponding to the energy storage system through the temperature control duration algorithm. The calculation formula of the temperature control duration algorithm is as follows:

[0114]

[0115] Where t is the temperature control duration; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion liquid; c co is the specific heat capacity of the immersion liquid; T avgcell is the average temperature of the battery cells; m cell is the mass of the battery cells; c cell is the specific heat capacity of the battery cells; t w (t) is the average temperature of the outer wall surface of the battery pack; t a is the ambient temperature; h is the ambient convective heat transfer coefficient; A is the total outer wall surface area of the battery pack; P is the temperature control power.

[0116] In this embodiment, the terminal analyzes and obtains the preset temperature T target based on the current temperature distribution information associated with the energy storage system and the optimal storage temperature range of the battery cells. Among them, the optimal storage temperature range of the battery cells is a temperature interval

T min , T max

[0117] The preset temperature T target can fall within the optimal storage temperature range of the battery cells. However, in actual applications, due to the influence of various factors (such as ambient temperature fluctuations, system thermal inertia, etc.), the terminal can select a temperature value outside the optimal storage temperature range as the preset temperature T target . The terminal analyzes and obtains the preset temperature T target based on the current temperature distribution information associated with the energy storage system and the optimal storage temperature range of the battery cells, which is more flexible and adaptable.

[0118] The temperature control adjustment database stores heating-type temperature control adjustment strategy types and cooling-type temperature control adjustment strategy types, and each type has multiple initial temperature control adjustment strategies. Each temperature control adjustment strategy type includes multiple initial temperature control adjustment strategies, and the multiple initial temperature control adjustment strategies can have different gears (such as gear 1, gear 2... gear n), and the temperature control power and the range of initial temperature control rates are different for each gear.

[0119] The terminal can pre-store the temperature control power of the initial temperature control adjustment strategies for each gear, or the temperature control adjustment database stores the temperature control power of the initial temperature control adjustment strategies for each gear in each temperature control adjustment strategy type. The terminal can directly call the data of the temperature control power of the initial temperature control adjustment strategies for each gear in the temperature control adjustment strategy type according to the temperature control type (cooling / heating), and through the temperature control duration algorithm, calculate the corresponding temperature control durations of the initial temperature control adjustment strategies for each gear to obtain the temperature control duration range.

[0120] After the terminal calculates the corresponding temperature control durations of the initial temperature control adjustment strategies for each gear, in the temperature control adjustment database, it filters out the initial temperature control adjustment strategies corresponding to each temperature control duration within the temperature control duration range.

[0121] Step S122: Based on the temperature control resource regulation information, among the initial temperature control adjustment strategies matched by the energy storage system, filter out the current temperature control adjustment strategy of the energy storage system.

[0122] In this embodiment, the terminal evaluates the energy consumption costs of the initial temperature control adjustment strategies matched by the energy storage system according to the temperature control resource regulation information, and on the premise of meeting the temperature control requirements, selects the strategy with the lowest energy consumption cost and the least impact on the equipment. If multiple strategies are similar in terms of energy consumption and cost, the terminal selects the strategy that can quickly reach the preset temperature to reduce the temperature control duration.

[0123] Based on the above solution, after filtering out the initial temperature control adjustment strategies matched by the energy storage system in the temperature control adjustment database, and then filtering out the current temperature control adjustment strategy of the energy storage system according to the temperature control resource regulation information, and selecting the temperature control adjustment strategy with a high energy efficiency ratio, it realizes the improvement of energy utilization efficiency, ensures that the selected current temperature control adjustment strategy not only meets the temperature control requirements of the energy storage system but also can be effectively implemented under actual conditions, thereby improving the overall performance and operation efficiency of the energy storage system.

[0124] In one of the embodiments, as Figure 4 shown, step S122: Based on the temperature control resource regulation information, among the initial temperature control adjustment strategies matched by the energy storage system, filter out the current temperature control adjustment strategy of the energy storage system, including steps S1221 - S1225:

[0125] Step S1221: Identify the current interval of the temperature control resource regulation information;

[0126] In this embodiment, the terminal identifies whether the current interval of the temperature control resource regulation information is the target interval. In this embodiment, the target interval is the low electricity price interval, where the low electricity price interval refers to the period when the power demand is low and the electricity price is relatively cheap, which is suitable for high-energy-consuming temperature control operations to reduce costs.

[0127] If the terminal identifies that the current interval of the temperature control resource regulation information is the target interval, it enters step S1222, and the terminal continues to screen the temperature control adjustment strategy according to the remaining duration of the target interval and the temperature control demand.

[0128] If the terminal identifies that the current interval of the temperature control resource regulation information is a non-target interval, it enters step S1225.

[0129] Step S1222: When the current interval is the target interval, determine the remaining duration of the target interval;

[0130] In this embodiment, when the current interval is the target interval, the terminal obtains the time point of the current moment and the end time point of the target interval, and calculates the remaining duration of the target interval. The terminal can obtain the time point of the current moment by synchronizing with a time server connected to the network or the clock module inside the terminal. The terminal can obtain the end time period of the target interval by querying the electricity price information provided by the power grid operator in real time.

[0131] After the terminal determines the remaining duration of the target interval, it can select the temperature control adjustment strategy that is most suitable for the current low electricity price interval according to the remaining duration of the target interval. If the remaining duration is very short, the terminal selects a strategy that can quickly reach the preset temperature; if the remaining duration is long, the terminal can select a more energy-saving and more economical strategy.

[0132] Step S1223: According to the remaining duration of the target interval, through the resource adaptation strategy, identify the temperature control adjustment range corresponding to the remaining duration of the target interval, and identify the initial temperature control rate range corresponding to each initial temperature control adjustment strategy, and the initial temperature control adjustment range corresponding to each initial temperature control adjustment strategy;

[0133] In this embodiment, the terminal, according to the remaining duration of the target interval, through the resource adaptation strategy, identifies the temperature control adjustment range corresponding to the remaining duration of the target interval, including: calculating the temperature control adjustment range corresponding to the remaining duration of the target interval according to the deviation value between the temperature information of the energy storage system and the preset temperature, and the deviation value between the ambient temperature information associated with the energy storage system and the preset temperature, and the temperature control rate range corresponding to the remaining duration of the target interval.

[0134] The terminal calculates the deviation value between the current temperature of the energy storage system and the preset temperature, and the deviation value between the ambient temperature associated with the energy storage system and the preset temperature.

[0135] The terminal determines the temperature control rate range corresponding to the remaining duration of the target interval based on the heat capacity of the energy storage system, the performance of the temperature control device, and the ambient temperature. In this embodiment, the temperature control rate range corresponding to the remaining duration of the target interval refers to the maximum and minimum rates at which the system can adjust the temperature according to the remaining time length of the target interval in the temperature control management of the energy storage system or specific equipment.

[0136] In this embodiment, the terminal can calculate the temperature change curve of the immersion liquid at different temperature control rates by analyzing parameters such as the heat capacity and heat conduction efficiency of the immersion liquid in the system, and determine the temperature control rate range that the system can achieve within the remaining duration of the target interval. In another embodiment, the terminal can also obtain the actual temperature change data of the system at different temperature control rates based on historical data. The terminal calculates the temperature control rate range of the system during actual operation according to these data, and verifies and optimizes it.

[0137] The terminal identifies the initial temperature control rate range corresponding to each initial temperature control adjustment strategy and the initial temperature control adjustment range corresponding to each initial temperature control adjustment strategy. The initial temperature control rate range refers to the rate change interval when the temperature control system starts to adjust the temperature. Different initial temperature control adjustment strategies have different temperature control rate ranges. The initial temperature control adjustment range refers to the temperature interval that the temperature control system can adjust when it starts to work. This range also varies depending on the strategy. The working modes or intensity levels of the initial temperature control adjustment strategies at different gears are different, and each gear has its specific temperature control rate and adjustment range.

[0138] Step S1224: Based on the temperature control adjustment range, each initial temperature control rate range, and each initial temperature control adjustment range, screen the current temperature control adjustment strategy of the energy storage system among the initial temperature control adjustment strategies.

[0139] In this embodiment, the terminal determines whether each initial temperature control adjustment strategy can complete the temperature management during the remaining duration of the target interval according to the temperature control adjustment range corresponding to the remaining duration of the target interval, the deviation value between the temperature information of the energy storage system and the preset temperature, and the deviation value between the ambient temperature information associated with the energy storage system and the preset temperature. If it can, the terminal selects the initial temperature control adjustment strategy with the lowest gear, the lowest temperature control power, and the longest temperature control duration among the multiple-gear initial temperature control adjustment strategies as the current temperature control adjustment strategy. After determining the current temperature control adjustment strategy, the terminal executes the current temperature control adjustment strategy with the preset temperature as the target. If not, the terminal re-determines the preset temperature according to the temperature control adjustment range corresponding to the remaining duration, and the terminal screens the temperature control adjustment strategy according to the re-determined preset temperature. In this embodiment, the terminal can automatically identify and apply the initial temperature control adjustment strategy that best suits the needs of the energy storage system and its associated ambient temperature through the built-in intelligent algorithm or preset program logic.

[0140] For example, there are the initial temperature control adjustment strategies for the 2nd gear and the 3rd gear of the refrigeration type matched with the energy storage system. However, the remaining duration of the target interval is only 20 minutes, and neither the initial temperature control adjustment strategy for the 2nd gear nor the 3rd gear can complete the temperature control management within the remaining duration. The terminal obtains the temperature control adjustment range corresponding to the remaining duration of the target interval. The temperature control adjustment range corresponding to 20 minutes is 5°C - 10°C. The terminal continues to identify the initial temperature control rate range corresponding to each initial temperature control adjustment strategy and the initial temperature control adjustment range corresponding to each initial temperature control adjustment strategy. The initial temperature control adjustment ranges of the initial temperature control adjustment strategies for the 2nd gear and the 3rd gear both meet the temperature control adjustment range corresponding to the remaining duration. However, the initial temperature control rate range of the initial temperature control adjustment strategy for the 2nd gear is higher than that of the 3rd gear. It can be understood that the initial temperature control adjustment strategy for the 2nd gear is a strategy of quickly controlling the temperature at a high temperature control rate and then gently controlling the temperature at a low temperature control rate, and the initial temperature control adjustment strategy for the 3rd gear is a strategy of stably controlling the temperature at a fixed temperature control rate. In this case, considering the remaining duration, the terminal selects the initial temperature control adjustment strategy for the 2nd gear instead of the 3rd gear with a higher power.

[0141] Step S1225: When the current interval is a non-target interval, perform temperature control processing on the energy storage system based on a preset temperature control adjustment strategy.

[0142] In this embodiment, after the terminal confirms that the current interval is a non-target interval, the terminal executes a preset temperature control adjustment strategy to perform temperature control processing on the energy storage system. The preset temperature control adjustment strategy can be set by the user or administrator during system initialization, or can be optimized based on system default settings or historical data.

[0143] The terminal performs corresponding temperature control operations on the energy storage system according to the preset temperature control adjustment strategy, which may include adjusting the set temperature of the temperature control management of the energy storage device, starting or stopping temperature control devices (such as liquid cooling units), etc., and adjusting the power output of the temperature control system.

[0144] Based on the above solution, by selecting the most suitable temperature control adjustment strategy according to the remaining duration of the target interval and performing temperature control operations in the target interval, the time periods with low power demand and low electricity prices are fully utilized, significantly reducing the temperature control cost of the energy storage system; when the remaining duration of the target interval is insufficient, the terminal accurately calculates the remaining duration of the target interval and the corresponding temperature control adjustment range, and selects a suitable temperature control strategy, avoiding ineffective temperature control and energy waste, improving the energy efficiency of temperature control operations. The terminal can be flexibly adjusted and optimized according to actual needs to adapt to changes in different energy storage systems, different ambient temperature conditions, and different electricity price policies, and also improves the intelligent level of temperature control management and the stability of the system.

[0145] In this embodiment, step S130 stops the temperature control process of the energy storage system until a stop temperature control instruction is received, including: stopping the temperature control process of the energy storage system when the current working state of the energy storage system changes to the charge and discharge state; stopping the temperature control process of the energy storage system when the ambient temperature information associated with the energy storage system reaches a preset temperature and a stop temperature control instruction is received; and / or stopping the temperature control process of the energy storage system in response to the upload operation of the stop temperature control instruction.

[0146] When the terminal detects that the energy storage system changes from a non-charge and discharge state to a charge and discharge state, in order to avoid potential interference between the temperature control process and the charge and discharge process, the terminal stops the temperature control process. If the energy storage system reaches the preset temperature, it means that the temperature control target has been completed, and the terminal stops the temperature control process. The terminal receives a stop temperature control instruction from the upper-level management system or the user. The stop temperature control instruction can be sent through an upload operation (such as a remote command, manual input, etc.), and the terminal stops the temperature control process.

[0147] Alternatively, after receiving the stop temperature control instruction, the terminal performs a confirmation step to verify the validity of the stop temperature control instruction, which can be achieved by verifying the source, format, permissions, etc. of the instruction. If the instruction is confirmed to be valid, the terminal performs the operation of stopping temperature control, including turning off the temperature control device and stopping temperature control management. In this embodiment, the terminal records the time, reason, and status of stopping temperature control, and may report this information to the upper-level management system or the user, which helps with subsequent system monitoring, fault troubleshooting, and performance optimization.

[0148] Based on the above solution, when the terminal receives the stop temperature control instruction, stopping the temperature control process of the energy storage system can ensure that the temperature control process of the energy storage system stops at the appropriate time, while maintaining the safety and stability of the energy storage system.

[0149] In one embodiment, after performing temperature control on the energy storage system based on the current temperature control adjustment strategy, the current interval of the temperature control resource regulation information is identified, and at the change time point when the current interval changes to a non-target interval, the current temperature control adjustment strategy is changed to a preset temperature control adjustment strategy, and temperature control is performed on the energy storage system based on the preset temperature control adjustment strategy.

[0150] In this embodiment, while the terminal performs temperature control according to the current temperature control adjustment strategy, it continuously monitors whether the current interval of the temperature control resource regulation information has changed. Once the terminal detects that the current interval has changed from the target interval (low electricity price interval) to a non-target interval (high electricity price interval), the terminal changes the current temperature control adjustment strategy to the preset temperature control adjustment strategy at the change time point of the current interval.

[0151] Based on the above solution, when the current interval changes to a non-target interval at the terminal, the preset temperature control adjustment strategy is used to replace the current temperature control adjustment strategy, ensuring the continuity of temperature control processing.

[0152] In one embodiment, based on the current temperature control adjustment strategy, temperature control processing is performed on the energy storage system to obtain new temperature distribution information of the energy storage system, including: starting the temperature control device (such as a liquid cooling unit) and operating the temperature control device according to the current temperature control adjustment strategy.

[0153] In one embodiment, step S121 calculates the temperature control duration range corresponding to the energy storage system through the temperature control duration algorithm, further including: determining the power compensation coefficient according to the current temperature control adjustment strategy, and substituting the power compensation coefficient into the temperature control duration algorithm to calculate the temperature control duration range corresponding to the energy storage system:

[0154]

[0155] where t is the temperature control duration; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion liquid; c co is the specific heat capacity of the immersion liquid; T avgcell is the average temperature of the battery cells; m cell is the mass of the battery cells; c cell is the specific heat capacity of the battery cells; t w (t) is the average temperature of the outer wall surface of the battery pack; t a is the ambient temperature; h is the ambient convective heat transfer coefficient; A is the total outer wall surface area of the battery pack; P is the temperature control power; k is the power compensation coefficient.

[0156] It can be understood that affected by various factors, such as the aging of the temperature control device, the change of the ambient temperature, and the change of the internal state of the energy storage system, there may be a difference between the actual power of the temperature control device and the calibrated power of each initial temperature control adjustment strategy.

[0157] In this embodiment, the terminal can determine the power compensation coefficient k based on the historical temperature control data of the energy storage system, and the power compensation coefficient k reflects the actual power output situation of the historical temperature control of the temperature control device.

[0158] Based on the above solution, the terminal substitutes the power compensation coefficient into the temperature control duration algorithm to calculate the temperature control duration range corresponding to the energy storage system and corrects the temperature control power, which can improve the accuracy of the calculation result, obtain a temperature control duration range closer to the actual situation, and is beneficial to improving the efficiency and accuracy of temperature control processing.

[0159] In one embodiment, step S121 calculates the temperature control duration range corresponding to the energy storage system through the temperature control duration algorithm, and further includes: determining whether the deviation value between the temperature information of the energy storage system and the preset temperature is within the preset range; when the deviation value between the temperature information of the energy storage system and the optimal storage temperature range exceeds the preset range, substituting the exceeded value into the temperature control duration algorithm to calculate the temperature control duration range corresponding to the energy storage system.

[0160] The terminal can set the safety range of the temperature of the battery cell as the preset range. The terminal can set the preset range of the temperature of the battery cell based on the thermal characteristics of the battery cell. If the minimum deviation value between the temperature of the battery cell and the optimal storage temperature range is greater than the preset range, then the system considers the battery cell to be in a dangerous state.

[0161] In one embodiment, when the temperature of the battery cell is higher than the optimal storage temperature range and the deviation value between the temperature of the battery cell and the optimal storage temperature range exceeds the preset range, substituting the exceeded value into the temperature control duration algorithm to calculate the temperature control duration range corresponding to the energy storage system, and the formula is as follows:

[0162]

[0163] where t is the temperature control duration; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion liquid; c co is the specific heat capacity of the immersion liquid; T avgcell is the average temperature of the battery cell; m cell is the mass of the battery cell; c cell is the specific heat capacity of the battery cell; t w (t) is the average temperature of the outer wall surface of the battery pack; t a is the ambient temperature; h is the ambient convective heat transfer coefficient; A is the total outer wall surface area of the battery pack; P is the temperature control power; a is the exceeded value.

[0164] In one embodiment, when the temperature of the battery cell is lower than the optimal storage temperature range and the deviation value between the temperature of the battery cell and the optimal storage temperature range exceeds the preset range, substituting the exceeded value into the temperature control duration algorithm to calculate the temperature control duration range corresponding to the energy storage system, and the formula is as follows:

[0165]

[0166] where t is the temperature control duration; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion liquid; c co is the specific heat capacity of the immersion liquid; T avgcell is the average temperature of the battery cell; m cellis the quality of the battery cell; c cell is the specific heat capacity of the battery cell; t w (t) is the average temperature of the outer wall surface of the battery pack; t a is the ambient temperature; h is the ambient convective heat transfer coefficient; A is the total area of the outer wall surface of the battery pack; P is the temperature control power; b is the excess value.

[0167] Based on the above solution, the terminal substitutes the deviation value obtained by compensating the preset temperature when the battery cell temperature exceeds the preset range into the temperature control duration algorithm, makes full use of the thermal inertia of the battery cell, improves the accuracy and efficiency of the battery cell temperature control, and helps to ensure the safety and performance of the battery cell.

[0168] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed 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 executed alternately or alternately with at least a part of other steps or steps in other steps.

[0169] Based on the same inventive concept, the embodiments of the present application also provide an intelligent temperature control device for an energy storage system for implementing the intelligent temperature control method for the energy storage system involved above. The solution provided by this device for solving problems is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the intelligent temperature control device for the energy storage system provided below can refer to the limitations on the intelligent temperature control method for the energy storage system in the above text, and will not be repeated here.

[0170] In an exemplary embodiment, as Figure 5 shown, an intelligent temperature control device for an energy storage system is provided, including: an acquisition module 310, a generation module 320, and a temperature control module 330, where:

[0171] The acquisition module 310 is configured to acquire the current temperature distribution information associated with the energy storage system, the current working state of the energy storage system, the historical temperature control strategy of the energy storage system, and the current temperature control resource regulation information, and identify the temperature control start time point of the energy storage system based on the historical temperature control strategy of the energy storage system and the current working state of the energy storage system;

[0172] A generation module 320 is configured to generate a current temperature control adjustment strategy for the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, and perform temperature control processing on the energy storage system based on the current temperature control adjustment strategy when the temperature control start time point is met, so as to obtain new temperature distribution information of the energy storage system;

[0173] A temperature control module 330 is configured to re-collect new temperature control resource regulation information, replace the current temperature distribution information with the new temperature distribution information, replace the current temperature control resource regulation information with the new temperature distribution information, and return to execute the step of generating the current temperature control adjustment strategy for the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, until the temperature control process of the energy storage system is stopped when a stop temperature control instruction is received.

[0174] In one embodiment, the acquisition module 310 is specifically configured to:

[0175] Identify the current execution status of the historical temperature control strategy, and when the current execution status is executed, use the current time point as the temperature control start time point of the energy storage system;

[0176] Use the historical temperature control strategy as the temperature control adjustment strategy of the energy storage system, and execute the step of performing temperature control processing on the energy storage system based on the temperature control adjustment strategy when the temperature control start time point is met, so as to obtain new temperature distribution information of the energy storage system;

[0177] When the current execution status is not executed, determine whether the current working status of the energy storage system is a charge and discharge status, and when the current working status of the energy storage system is a charge and discharge status, use the change time point of the current working status of the energy storage system as the temperature control start time point of the energy storage system;

[0178] When the current working status of the energy storage system is not a charge and discharge status, use the current time point as the temperature control start time point of the energy storage system.

[0179] In one embodiment, the generation module 320 is specifically configured to:

[0180] Based on the temperature information of the energy storage system, the temperature change trend of the energy storage system, the ambient temperature information associated with the energy storage system, and the ambient temperature change trend associated with the energy storage system, calculate the temperature control duration range corresponding to the energy storage system through a temperature control duration algorithm, and based on the temperature control duration range, screen the initial temperature control adjustment strategy matched by the energy storage system in a temperature control adjustment database;

[0181] Based on the temperature control resource regulation information, screen the current temperature control adjustment strategy of the energy storage system from the initial temperature control adjustment strategies matched by the energy storage system.

[0182] In one embodiment, the temperature control duration algorithm is as follows:

[0183]

[0184] where t is the temperature control duration; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion liquid; c co is the specific heat capacity of the immersion liquid; T avgcell is the average temperature of the battery cell; m cell is the mass of the battery cell; c cell is the specific heat capacity of the battery cell; t w t(t) is the average temperature of the outer wall surface of the battery pack; t a is the ambient temperature; h is the ambient convective heat transfer coefficient; A is the total outer wall surface area of the battery pack; P is the temperature control power.

[0185] In one embodiment, the generating module 320 is specifically configured to:

[0186] Identify the current interval of the temperature control resource regulation information;

[0187] When the current interval is the target interval, determine the remaining duration of the target interval;

[0188] According to the remaining duration of the target interval, through the resource adaptation strategy, identify the temperature control adjustment range corresponding to the remaining duration of the target interval, and identify the initial temperature control rate range corresponding to each initial temperature control adjustment strategy, as well as the initial temperature control adjustment range corresponding to each initial temperature control adjustment strategy;

[0189] Based on the temperature control adjustment range, each initial temperature control rate range, and each initial temperature control adjustment range, screen the current temperature control adjustment strategy of the energy storage system among the initial temperature control adjustment strategies;

[0190] When the current interval is a non-target interval, perform temperature control processing on the energy storage system based on the preset temperature control adjustment strategy.

[0191] In one embodiment, the generating module 320 is specifically configured to:

[0192] According to the remaining duration of the target interval, through the resource adaptation strategy, identify the temperature control adjustment range corresponding to the remaining duration of the target interval, including:

[0193] According to the deviation value between the temperature information of the energy storage system and the preset temperature, and the deviation value between the ambient temperature information associated with the energy storage system and the preset temperature, calculate the temperature control adjustment range corresponding to the remaining duration of the target interval based on the temperature control rate range corresponding to the remaining duration of the target interval.

[0194] In one embodiment, the temperature control module 330 is specifically configured to:

[0195] When the current working state of the energy storage system changes to the charge and discharge state, stop the temperature control process of the energy storage system;

[0196] When the ambient temperature information associated with the energy storage system reaches a preset temperature and a stop temperature control instruction is received, stop the temperature control process of the energy storage system;

[0197] And / or, in response to the upload operation of the stop temperature control instruction, stop the temperature control process of the energy storage system.

[0198] In one embodiment, the generation module 320 is specifically configured to:

[0199] After performing temperature control on the energy storage system based on the current temperature control adjustment strategy, identify the current interval of the temperature control resource regulation information, and at the change time point when the current interval changes to a non-target interval, change the current temperature control adjustment strategy to a preset temperature control adjustment strategy, and perform temperature control on the energy storage system based on the preset temperature control adjustment strategy.

[0200] Each module in the intelligent temperature control device of the above energy storage system can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor in the energy storage system in hardware form or independent of the processor, or stored in the memory in the energy storage system in software form, so that the processor can call and execute the operations corresponding to the above modules.

[0201] In a third aspect, the present application provides an energy storage system, which can be a terminal. The energy storage system includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps of the intelligent temperature control method of the energy storage system in the above embodiment are implemented.

[0202] The internal structure diagram of the energy storage system can be as Figure 6As shown in the figure. The energy storage system includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the energy storage system is used to provide computing and control capabilities. The memory of the energy storage system includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the energy storage system is used to store temperature control data. The input / output interface of the energy storage system is used to exchange information between the processor and external devices. The communication interface of the energy storage system is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements an intelligent temperature control method for an energy storage system.

[0203] Those skilled in the art can understand that Figure 6 the structure shown in the figure is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the energy storage system to which the solution of the present application is applied. The specific energy storage system may include more or fewer components than those shown in the figure, or combine some components, or have a different component arrangement.

[0204] It should be noted that the information (including but not limited to energy storage system information) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0205] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. 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), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processors, graphics processors, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., without limitation.

[0206] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered as the scope described in this specification.

[0207] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An intelligent temperature control device for an energy storage system, characterized in that, The device includes: An acquisition module, configured to acquire the current temperature distribution information associated with the energy storage system, the current working state of the energy storage system, the historical temperature control strategy of the energy storage system, and the current temperature control resource regulation information, and identify the temperature control start time point of the energy storage system based on the historical temperature control strategy of the energy storage system and the current working state of the energy storage system; A generation module, configured to calculate a temperature control duration range based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, and according to the temperature control duration algorithm based on the current temperature distribution information associated with the energy storage system; generate the current temperature control adjustment strategy of the energy storage system, and when the temperature control start time point is satisfied, perform temperature control processing on the energy storage system based on the current temperature control adjustment strategy to obtain the new temperature distribution information of the energy storage system; A temperature control module, configured to re-acquire the new temperature control resource regulation information, replace the current temperature distribution information with the new temperature distribution information, replace the current temperature control resource regulation information with the new temperature control resource regulation information, and return to execute the step of generating the current temperature control adjustment strategy of the energy storage system based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, until a stop temperature control instruction is received, and stop the temperature control processing process of the energy storage system.

2. The intelligent temperature control device of the energy storage system according to claim 1, wherein The acquisition module is used for: Identifying the current execution state of the historical temperature control strategy, and when the current execution state is executed, taking the current time point as the temperature control start time point of the energy storage system; Taking the historical temperature control strategy as the temperature control adjustment strategy of the energy storage system, and executing the step of performing temperature control processing on the energy storage system based on the temperature control adjustment strategy when the temperature control start time point is satisfied to obtain the new temperature distribution information of the energy storage system; When the current execution state is not executed, judging whether the current working state of the energy storage system is a charge and discharge state, and when the current working state of the energy storage system is a charge and discharge state, taking the change time point of the current working state of the energy storage system as the temperature control start time point of the energy storage system; When the current working state of the energy storage system is not a charge and discharge state, taking the current time point as the temperature control start time point of the energy storage system.

3. The intelligent temperature control device for the energy storage system according to claim 1, wherein The generation module is used for: Calculating the temperature control duration range corresponding to the energy storage system through the temperature control duration algorithm based on the temperature information of the energy storage system, the temperature change trend of the energy storage system, the ambient temperature information associated with the energy storage system, and the ambient temperature change trend associated with the energy storage system, and screening the initial temperature control adjustment strategy matched by the energy storage system in the temperature control adjustment database based on the temperature control duration range; Screening the current temperature control adjustment strategy of the energy storage system from the initial temperature control adjustment strategies matched by the energy storage system based on the current temperature control resource regulation information.

4. The intelligent temperature control device of the energy storage system according to claim 3, wherein The temperature control duration algorithm is: where t is the temperature control duration; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion liquid; c co is the specific heat capacity of the immersion liquid; T avgcell is the average temperature of the battery cell; m cell is the mass of the battery cell; c cell is the specific heat capacity of the battery cell; t w (t) is the average temperature of the outer wall surface of the battery pack; t a is the ambient temperature; h is the ambient convective heat transfer coefficient; A is the total outer wall surface area of the battery pack; P is the temperature control power.

5. The intelligent temperature control device of the energy storage system according to claim 3, characterized in that, The generating module executes to screen the current temperature control adjustment strategy of the energy storage system from each of the initial temperature control adjustment strategies matched with the energy storage system based on the current temperature control resource regulation information, including: Identifying the current interval of the temperature control resource regulation information; When the current interval is the target interval, determining the remaining duration of the target interval; According to the remaining duration of the target interval, through the resource adaptation strategy, identifying the temperature control adjustment range corresponding to the remaining duration of the target interval, and identifying the initial temperature control rate range corresponding to each of the initial temperature control adjustment strategies and the initial temperature control adjustment range corresponding to each of the initial temperature control adjustment strategies; Based on the temperature control adjustment range, each of the initial temperature control rate ranges, and each of the initial temperature control adjustment ranges, screening the current temperature control adjustment strategy of the energy storage system from each of the initial temperature control adjustment strategies; When the current interval is a non-target interval, performing temperature control processing on the energy storage system based on a preset temperature control adjustment strategy.

6. The intelligent temperature control device of the energy storage system according to claim 5, characterized in that The generating module executes to identify the temperature control adjustment range corresponding to the remaining duration of the target interval according to the remaining duration of the target interval through the resource adaptation strategy, including: Calculating the temperature control adjustment range corresponding to the remaining duration of the target interval according to the deviation value between the temperature information of the energy storage system and the preset temperature and the deviation value between the ambient temperature information associated with the energy storage system and the preset temperature and the temperature control rate range corresponding to the remaining duration of the target interval.

7. The intelligent temperature control device for the energy storage system according to claim 5, characterized in that, The temperature control module executes to stop the temperature control processing process of the energy storage system until a stop temperature control instruction is received, including: When the current working state of the energy storage system changes to the charge and discharge state, stopping the temperature control processing process of the energy storage system; When the ambient temperature information associated with the energy storage system reaches the preset temperature and a stop temperature control instruction is received, stopping the temperature control processing process of the energy storage system.

8. The intelligent temperature control device of the energy storage system according to claim 5, characterized in that, The temperature control module executes to stop the temperature control processing process of the energy storage system until a stop temperature control instruction is received, including: Responding to the upload operation of the stop temperature control instruction and stopping the temperature control processing process of the energy storage system.

9. The intelligent temperature control device of the energy storage system according to claim 5, characterized in that, The generating module is further configured to: after performing temperature control processing on the energy storage system based on the current temperature control adjustment strategy, identify the current interval of the temperature control resource regulation information, and at the change time point when the current interval changes to a non-target interval, change the current temperature control adjustment strategy to a preset temperature control adjustment strategy and perform temperature control processing on the energy storage system based on the preset temperature control adjustment strategy.

10. A energy storage system, comprising a memory and a processor, the memory storing a computer program, characterized in that, The processor implements the steps of the method according to any one of claims 1 to 9 when executing the computer program.

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