Intelligent temperature control method, temperature control device and energy storage system

Abstract

The present application relates to an intelligent temperature control method, temperature control device, and energy storage system for an energy storage system. The method includes: obtaining 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 current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, generating the current temperature control regulation strategy of the energy storage system, 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 regulation strategy to obtain new temperature distribution information of the energy storage system; re-collecting 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 regulation strategy of the energy storage system, so as to perform intelligent temperature management on the energy storage system in a non-working state.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an intelligent temperature control method, a temperature control device, and an energy storage system for an energy storage system. Background Art

[0002] Temperature management of battery cells in energy storage systems is crucial. Battery cells generate heat during the charging and discharging process and require an effective cooling system to maintain their operating temperature. If the temperature is not properly controlled, it will affect the efficiency and life of the battery cells and even cause thermal runaway.

[0003] When using immersion liquid cooling technology, immersion liquid cooling exchanges heat through direct contact with the battery cell, which has a good temperature control effect. However, when the system is charged and discharged and the liquid cooling unit stops working, if the ambient temperature is not suitable, the temperature of the battery cell and the immersion liquid may deviate from the optimal storage temperature range. In addition, too high or too low ambient temperature will cause fluctuations in the battery cell temperature, thereby affecting the storage life of the battery cell. Summary of the invention

[0004] Based on this, it is necessary to provide an intelligent temperature control method, temperature control device, and energy storage system for an energy storage system that performs temperature management on the energy storage system when it is not working, in order to address the above technical problems.

[0005] In a first aspect, the present application provides an intelligent temperature control method for an energy storage system, comprising:

[0006] Acquire 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 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;

[0007] Based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, a current temperature control adjustment strategy of the energy storage system is generated, and when the temperature control start time point is met, the energy storage system is temperature controlled based on the current temperature control adjustment strategy to obtain new temperature distribution information of the energy storage system;

[0008] 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, 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 receiving a stop temperature control instruction, stop the temperature control processing process of the energy storage system.

[0009] In one embodiment, the 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:

[0010] Identify the current execution state of the historical temperature control strategy, and when the current execution state is executed, use the current time point as the temperature control start time point of the energy storage system;

[0011] The historical temperature control strategy is used as the temperature control adjustment strategy of the energy storage system, and when the temperature control start time point is met, the energy storage system is temperature controlled based on the temperature control adjustment strategy to obtain new temperature distribution information of the energy storage system;

[0012] When the current execution state is not executed, determine whether the current working state of the energy storage system is a charging and discharging state, and when the current working state of the energy storage system is a charging and discharging state, use 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;

[0013] When the current working state of the energy storage system is not a charging and discharging state, the current time point is used as the temperature control start time point of the energy storage system.

[0014] In one embodiment, the generating of 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:

[0015] 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, a temperature control time range corresponding to the energy storage system is calculated through a temperature control time algorithm, and based on the temperature control time range, an initial temperature control adjustment strategy matching the energy storage system is screened in a temperature control adjustment database;

[0016] Based on the temperature control resource regulation information, the current temperature control regulation strategy of the energy storage system is screened from the initial temperature control regulation strategies matched by the energy storage system.

[0017] In one embodiment, the temperature control duration algorithm is:

[0018]

[0019] Where, t is the temperature control time; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion fluid; cco is the specific heat capacity of the immersion fluid; 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 of the battery pack; t a is the ambient temperature; h is the ambient convection heat transfer coefficient; A is the total area of ​​the outer wall of the battery pack; P is the temperature control power.

[0020] In one embodiment, based on the temperature control resource regulation information, selecting the current temperature control regulation strategy of the energy storage system from the initial temperature control regulation strategies matched by the energy storage system includes:

[0021] Identifying a current interval of the temperature control resource regulation information;

[0022] If the current interval is a target interval, determining a remaining duration of the target interval;

[0023] According to the remaining duration of the target interval, identifying the temperature control adjustment range corresponding to the remaining duration of the target interval through the resource adaptation strategy, 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;

[0024] 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 a current temperature control adjustment strategy of the energy storage system from each of the initial temperature control adjustment strategies;

[0025] When the current interval is a non-target interval, the energy storage system is temperature controlled based on a preset temperature control adjustment strategy.

[0026] In one of the embodiments, identifying the temperature control adjustment range corresponding to the remaining duration of the target interval through a resource adaptation strategy according to the remaining duration of the target interval includes:

[0027] According to the deviation value between the temperature information of the energy storage system and the preset temperature, 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 time of the target interval, the temperature control adjustment range corresponding to the remaining time of the target interval is calculated.

[0028] In one embodiment, the process of stopping the temperature control process of the energy storage system until a temperature control stop instruction is received includes:

[0029] When the current working state of the energy storage system is changed to a charging and discharging state, stopping the temperature control process of the energy storage system;

[0030] When the ambient temperature information associated with the energy storage system reaches a preset temperature and a temperature control stop instruction is received, stopping the temperature control process of the energy storage system;

[0031] And / or, in response to the upload operation of stopping the temperature control instruction, stopping the temperature control processing process of the energy storage system.

[0032] In one of the embodiments, after the energy storage system is temperature controlled based on the current temperature control regulation strategy, the current interval of the temperature control resource regulation information is identified, and at the change time point when the current interval is changed to a non-target interval, the current temperature control regulation strategy is changed to a preset temperature control regulation strategy, and the energy storage system is temperature controlled based on the preset temperature control regulation strategy.

[0033] In a second aspect, the present application provides an intelligent temperature control device for an energy storage system, the device comprising:

[0034] An acquisition module, used to acquire 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 current temperature control resource regulation information, and identify a 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;

[0035] A generation module, 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 to 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;

[0036] 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, 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 receiving a stop temperature control instruction, and stop the temperature control processing process of the energy storage system.

[0037] In one embodiment, the acquisition module is specifically used to:

[0038] Identify the current execution state of the historical temperature control strategy, and when the current execution state is executed, use the current time point as the temperature control start time point of the energy storage system;

[0039] The historical temperature control strategy is used as the temperature control adjustment strategy of the energy storage system, and when the temperature control start time point is met, the energy storage system is temperature controlled based on the temperature control adjustment strategy to obtain new temperature distribution information of the energy storage system;

[0040] When the current execution state is not executed, determine whether the current working state of the energy storage system is a charging and discharging state, and when the current working state of the energy storage system is a charging and discharging state, use 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;

[0041] When the current working state of the energy storage system is not a charging and discharging state, the current time point is used as the temperature control start time point of the energy storage system.

[0042] In one embodiment, the generating module is specifically used for:

[0043] 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, a temperature control time range corresponding to the energy storage system is calculated through a temperature control time algorithm, and based on the temperature control time range, an initial temperature control adjustment strategy matching the energy storage system is screened in a temperature control adjustment database;

[0044] Based on the temperature control resource regulation information, the current temperature control regulation strategy of the energy storage system is screened from the initial temperature control regulation strategies matched by the energy storage system.

[0045] In one embodiment, the temperature control duration algorithm is:

[0046]

[0047] Where, t is the temperature control time; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion fluid; c co is the specific heat capacity of the immersion fluid; 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 of the battery pack; t ais the ambient temperature; h is the ambient convection heat transfer coefficient; A is the total area of ​​the outer wall of the battery pack; P is the temperature control power.

[0048] In one embodiment, the generating module is specifically used for:

[0049] Identifying a current interval of the temperature control resource regulation information;

[0050] If the current interval is a target interval, determining a remaining duration of the target interval;

[0051] According to the remaining duration of the target interval, identifying the temperature control adjustment range corresponding to the remaining duration of the target interval through the resource adaptation strategy, 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;

[0052] 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 a current temperature control adjustment strategy of the energy storage system from each of the initial temperature control adjustment strategies;

[0053] When the current interval is a non-target interval, the energy storage system is temperature controlled based on a preset temperature control adjustment strategy.

[0054] In one embodiment, the generating module is specifically used for:

[0055] The step of identifying the temperature control adjustment range corresponding to the remaining duration of the target interval through a resource adaptation strategy according to the remaining duration of the target interval includes:

[0056] According to the deviation value between the temperature information of the energy storage system and the preset temperature, 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 time of the target interval, the temperature control adjustment range corresponding to the remaining time of the target interval is calculated.

[0057] In one embodiment, the temperature control module is specifically used for:

[0058] When the current working state of the energy storage system is changed to a charging and discharging state, stopping the temperature control process of the energy storage system;

[0059] When the ambient temperature information associated with the energy storage system reaches a preset temperature and a temperature control stop instruction is received, stopping the temperature control process of the energy storage system;

[0060] And / or, in response to the upload operation of stopping the temperature control instruction, stopping the temperature control processing process of the energy storage system.

[0061] In one embodiment, the generating module is specifically used for:

[0062] After the energy storage system is temperature controlled based on the current temperature control regulation strategy, the current interval of the temperature control resource regulation information is identified, and at the change time point when the current interval is changed to a non-target interval, the current temperature control regulation strategy is changed to a preset temperature control regulation strategy, and the energy storage system is temperature controlled based on the preset temperature control regulation strategy.

[0063] In a third aspect, the present application provides an energy storage system, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method described in the first aspect when executing the computer program.

[0064] The above-mentioned intelligent temperature control method, temperature control device, and energy storage system of the energy storage system include: obtaining 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 new temperature distribution information of the energy storage system; re-collecting 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, returning to 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 receiving a stop temperature control instruction, stopping the temperature control processing process of the energy storage system. This solution obtains the current temperature distribution information, working status, historical temperature control strategy and current temperature control resource regulation information of the energy storage system, and identifies the temperature control start time point based on the historical temperature control strategy and current working status to determine when the temperature control mechanism needs to be started to avoid energy efficiency loss caused by starting too early or too late. At the same time, it ensures that the energy storage system can be maintained within the optimal operating temperature range under various working conditions, and temperature management can also be performed on the energy storage system in a non-working state, thereby extending the battery life of the energy storage system, improving system efficiency and reducing the risk of thermal runaway. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0066] Figure 1 A schematic diagram of a flow chart of an intelligent temperature control method for an energy storage system in one embodiment;

[0067] Figure 2 A schematic diagram of a process for identifying a temperature control start time point of an energy storage system in one embodiment;

[0068] Figure 3 A schematic diagram of a process for generating a current temperature control strategy for an energy storage system in one embodiment;

[0069] Figure 4 A schematic diagram of a process for screening various initial temperature control adjustment strategies in one embodiment;

[0070] Figure 5 is a structural block diagram of an intelligent temperature control device of an energy storage system in one embodiment;

[0071] Figure 6 FIG. 4 is a diagram showing the internal structure of an energy storage system in one embodiment. DETAILED DESCRIPTION

[0072] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with 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.

[0073] In an exemplary embodiment, Figure 1As shown, a smart temperature control method for an energy storage system is provided. This embodiment uses the method applied to a terminal as an example, wherein the terminal may be, but is not limited to, an energy storage system, a battery management system (BMS), various personal computers, laptops, smart phones, tablet computers, IoT devices, and portable wearable devices. IoT devices may be smart speakers, smart TVs, smart air conditioners, smart vehicle-mounted devices, projection devices, and the like. Portable wearable devices may be smart watches, smart bracelets, head-mounted devices, and the like. Head-mounted devices may be virtual reality (VR) devices, augmented reality (AR) devices, smart glasses, and the like. It is understandable that the method may also be applied to a server, and may also be applied to a system including a terminal and a server, and may be implemented through the interaction between the terminal and the server. The smart temperature control method for an energy storage system includes the following steps S110 to S130. Among them:

[0074] Step S110: obtaining 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;

[0075] In this embodiment, the energy storage system includes a plurality of immersed battery packs, a temperature control device (for example, a liquid cooling circulation loop, a liquid cooling unit), and an immersion liquid, wherein the battery packs contain battery cells, the immersed battery packs are immersed in an insulating medium, and the temperature control device includes a temperature controller connected in series. The energy storage system is associated with a plurality of temperature sensors, which are used to detect the temperature of the energy storage system and the environment in which the energy storage system is located, wherein temperature sensors are arranged on the outer surface and inner surface of the battery packs of the energy storage system, the surface of the battery cells, the immersion liquid, and the air environment surrounding the energy storage system.

[0076] The terminal is respectively connected to the immersion battery pack, temperature control equipment, and immersion liquid of the energy storage system in communication, and the terminal is also respectively connected to several temperature sensors associated with the energy storage system in communication.

[0077] The terminal obtains the current temperature distribution information associated with the energy storage system, the current working status of the energy storage system, the historical temperature control strategy of the energy storage system, and the current temperature control resource regulation information.

[0078] 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 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 cell, and the real-time temperature data of the immersion liquid) and the real-time temperature data of the environment associated with the energy storage, generate a temperature distribution diagram or a temperature matrix with time as the horizontal axis and temperature as the vertical axis, and obtain the current temperature distribution information associated with the energy storage system.

[0079] The current working state of the energy storage system may include a charging and discharging state and a non-charging and discharging state.

[0080] The historical temperature control strategy of the energy storage system refers to whether the temperature control strategy of the energy storage system has been implemented on the same day. The current temperature control resource regulation information may include but is not limited to: the current power grid electricity price policy, the current power grid electricity price range, and the remaining time of the current electricity price range. The current power grid electricity price may change due to policy, time, season, 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 based on the current temperature control resource regulation information.

[0081] The terminal identifies the temperature control start time 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 of the energy storage system in the current state. For example, the temperature control start time of the energy storage system can be identified when the temperature control strategy has not been executed on the day of the energy storage system and the current working state of the energy storage system is not in a non-charging and discharging state.

[0082] In this embodiment, the terminal can use an algorithm model (such as machine learning, deep learning, etc.) to analyze the historical temperature control strategy of the energy storage system and the current working state of the energy storage system, and set the start condition of the temperature control adjustment according to the output result of the algorithm model, so as to use the time point when the start condition of the temperature control adjustment is reached as the start time point of the temperature control. The start condition of the 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), the economy of the temperature control adjustment is optimized to reduce the valley and fill the peak.

[0083] Step S120: Based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, a current temperature control adjustment strategy of the energy storage system is generated, and when the temperature control start time point is met, the energy storage system is temperature controlled based on the current temperature control adjustment strategy to obtain new temperature distribution information of the energy storage system;

[0084] 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 and in combination with the electricity price policy, electricity price range, etc., so as to make full use of the low electricity price area, reduce the peak and fill the valley, 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 changes and temperature control resource status during the temperature control process are monitored in real time to ensure that the temperature control effect meets expectations.

[0085] The terminal can determine the temperature thresholds associated with the energy storage system according to the design and operation requirements of the energy storage system. The temperature thresholds associated with the energy storage system may 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. When the current temperature distribution information associated with the energy storage system reaches the temperature threshold, the terminal starts the current temperature control adjustment strategy in the low electricity price area in combination with the electricity price policy and electricity price period of the current temperature control adjustment strategy. The terminal performs temperature management on the energy storage system according to the current temperature control adjustment strategy, detects the temperature changes of the energy storage system in real time, and obtains new temperature distribution information of the energy storage system.

[0086] The terminal can compare the current temperature distribution information associated with the energy storage system that generates the current temperature control 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 strategy, and adjust and optimize the current temperature control strategy according to the evaluation results. The terminal can also record key data and information during the temperature control process to provide a reference for subsequent temperature management and system optimization.

[0087] 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, return to 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 receiving the stop temperature control instruction, stop the temperature control processing of the energy storage system.

[0088] In this embodiment, when the terminal performs 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 current power grid electricity price changes due to policies, time, season, 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.

[0089] During the process of the terminal performing temperature management on the energy storage system, the terminal obtains new temperature distribution information of the energy storage system through the temperature sensor 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 cell, 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.

[0090] Based on the replaced current temperature control resource control information (updated) and current temperature distribution information (updated), the terminal executes the steps 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 control information, and updates the current temperature control adjustment strategy, and performs temperature control processing on the energy storage system according to the updated current temperature control adjustment strategy. During the temperature control processing, the terminal regularly updates the current temperature control resource control information and the current temperature distribution information to adjust the temperature control strategy, so as to ensure that the temperature control processing can continuously adapt to changes in the system status and external environment, and achieve efficient and economical temperature control effects.

[0091] The intelligent temperature control method, temperature control device, and energy storage system of the energy storage system obtain the current temperature distribution information, working status, historical temperature control strategy, and current temperature control resource regulation information of the energy storage system, and identify the temperature control start time point based on the historical temperature control strategy and the current working status to determine when the temperature control mechanism needs to be started to avoid energy efficiency loss caused by starting too early or too late. At the same time, it ensures that the energy storage system can be maintained within the optimal operating temperature range under various working conditions, and temperature management can also be performed on the energy storage system in a non-working state, thereby extending the battery life of the energy storage system, improving system efficiency, and reducing the risk of thermal runaway.

[0092] In an exemplary embodiment, Figure 2 As 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 to S114:

[0093] Step S111: 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;

[0094] In this embodiment, the terminal can search whether there is a record of the execution of the temperature control strategy of the energy storage system on that day by reading the work log or database of the energy storage system.

[0095] If the terminal finds a record of the energy storage system executing the temperature control strategy on that day, and the record shows that the temperature control strategy has been executed on that day, the current execution status is "executed", and then enters step S112, starts the corresponding temperature control device at the current time point, and performs temperature control according to the historical temperature control strategy.

[0096] If the terminal does not find the record of the energy storage system executing the temperature control strategy on that day or the record shows that the temperature control strategy was not executed on that day, the current execution status is "not executed", and the process enters step S113.

[0097] Step S112: using the historical temperature control strategy as the temperature control adjustment strategy of the energy storage system, and executing the temperature control processing of 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 step of the energy storage system;

[0098] In this embodiment, if the terminal has executed the temperature control strategy on the same day, it directly uses the historical temperature control strategy as the temperature control adjustment strategy of the energy storage system (for example, the temperature control strategy last executed by the energy storage system can be obtained), and when the temperature control start time point is met, the terminal controls the temperature of the energy storage system based on the historical temperature control strategy (for example, the temperature control strategy last executed). The terminal monitors the temperature changes managed by the energy storage system and obtains new temperature distribution information.

[0099] In this embodiment, the terminal may directly obtain the last executed temperature control strategy from the work log or database of the energy storage system as the temperature control adjustment strategy of the energy storage system.

[0100] Step S113: when the current execution state is not executed, determine whether the current working state of the energy storage system is a charging and discharging state, and when the current working state of the energy storage system is a charging and discharging state, use 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;

[0101] In this embodiment, when the terminal does not execute the temperature control strategy on the day, the temperature control start time point is determined according to the current working state of the energy storage system. The terminal obtains the current working state of the energy storage system and determines whether the energy storage system is in a charging and discharging state. If the energy storage system is charging and discharging, the terminal uses the time point when the current working state of the energy storage system changes as the temperature control start time point, that is, the terminal uses the time point when the current working state of the energy storage system changes from the charging and discharging state to the non-charging and discharging state (such as the standby state or the shutdown state) as the temperature control start time point.

[0102] If the current working state of the terminal energy storage system is not a charging or discharging state (such as a standby state or a shutdown state), the terminal enters step S114.

[0103] Step S114: when the current working state of the energy storage system is not the charging and discharging state, the current time point is used as the temperature control start time point of the energy storage system.

[0104] In this embodiment, when the energy storage system has neither executed a historical temperature control strategy nor is in a charging or discharging state, the terminal uses 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 perform temperature management on the energy storage system.

[0105] For immersion energy storage systems, after the energy storage system is charged and discharged, the temperature control equipment 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 high. This will cause the temperature of the battery cell to continue to rise during the static process, thereby exceeding the optimal storage temperature range. Excessive temperature will accelerate the rate of chemical reactions inside the battery cell, resulting in a decrease in battery cell performance and a shortened life. On the contrary, when the ambient temperature is too low, the temperature of the immersion fluid and the battery cell may drop to a level that is too low, and may also cause certain materials inside the battery cell to deform or be damaged, thereby affecting the performance and life of the battery cell.

[0106] Based on the above scheme, 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; if the temperature control strategy has been executed on the same day, the energy storage system is temperature controlled based on the historical temperature control strategy. When the energy storage system has neither executed the historical temperature control strategy nor is in the charging and discharging 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 energy storage systems in different states, thereby ensuring that the battery cells operate within the optimal storage temperature range, which can extend the service life of the battery cells, improve the overall performance and reliability of the energy storage system, and ensure that the non-charging and discharging state of the energy storage system can still be maintained within the optimal storage temperature range, further extending the service life of the battery cells and maintaining their stable performance.

[0107] In an exemplary embodiment, Figure 3 As shown, step S120 generates 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, including steps S121-S122:

[0108] 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, a temperature control time range corresponding to the energy storage system is calculated through a temperature control time algorithm, and based on the temperature control time range, an initial temperature control adjustment strategy matching the energy storage system is screened in the temperature control adjustment database;

[0109] 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.

[0110] The temperature information of the energy storage system includes at least 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 cell, and the temperature of the immersion liquid. The temperature change trend of the energy storage system includes at least the temperature change trend (increasing or decreasing) of the outer surface of the battery pack, the temperature change trend of the inner surface of the battery pack, the temperature change trend of the battery cell, and the temperature change trend of the immersion liquid. The temperature of the outer surface of the battery pack can reflect the thermal impact of the environment on the battery pack, and the temperature of the inner surface of the battery pack reflects the heat generated by the battery cell and the internal heat dissipation. The battery cell is the core component of the energy storage system, and the temperature of the battery cell directly affects the charge and discharge efficiency, cycle life and safety of the energy storage system. The temperature of the immersion liquid can be used to understand its effect on the heat dissipation of the battery cell.

[0111] The ambient temperature information associated with the energy storage system includes at least the temperature of the air environment surrounding 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 surrounding the energy storage system. The temperature of the environment in which the energy storage system is located will also affect the overall temperature distribution of the system. For example, the temperature and the heat exchange coefficient between the external air and the immersion liquid have a significant impact on the heat dissipation or heat preservation of the battery pack.

[0112] The terminal calculates the temperature control time range corresponding to the energy storage system through the temperature control time algorithm. The calculation formula of the temperature control time algorithm is as follows:

[0113]

[0114] Where, t is the temperature control time; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion fluid; c co is the specific heat capacity of the immersion fluid; 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 of the battery pack; t a is the ambient temperature; h is the ambient convection heat transfer coefficient; A is the total area of ​​the outer wall of the battery pack; P is the temperature control power.

[0115] In this embodiment, the terminal obtains the preset temperature T based on the current temperature distribution information associated with the energy storage system and the optimal storage temperature range of the battery cell. targetAmong them, the optimal storage temperature range of the battery cell is a temperature range that includes multiple temperature values ​​[T min , T max 】. Within the optimal storage temperature, the performance and life of the battery cell can be best guaranteed.

[0116] Preset temperature T target It can fall within the optimal storage temperature range of the battery cell. However, in actual applications, due to the influence of various factors (such as ambient temperature fluctuations, system thermal inertia, etc.), the terminal may select a temperature value outside the optimal storage temperature range as the preset temperature T target The terminal obtains the preset temperature T based on the current temperature distribution information associated with the energy storage system and the optimal storage temperature range of the battery cell. target , more flexible and adaptable.

[0117] The temperature control database stores heating temperature control strategy types and cooling temperature control strategy types, each of which has multiple initial temperature control strategies. Each temperature control strategy type includes multiple initial temperature control strategies, which can have different gears (such as 1st gear, 2nd gear...n gears), and each gear has different temperature control power and initial temperature control rate range.

[0118] The terminal can pre-store the temperature control power of the initial temperature control adjustment strategy for each gear, or the temperature control adjustment database stores the temperature control power of the initial temperature control adjustment strategy for each gear in each temperature control adjustment strategy type. The terminal can directly call the temperature control power data of the initial temperature control adjustment strategy for each gear in the temperature control adjustment strategy type according to the temperature control type (cooling / heating), and calculate the corresponding temperature control duration of the initial temperature control adjustment strategy for each gear through the temperature control duration algorithm to obtain the temperature control duration range.

[0119] After calculating the temperature control duration corresponding to the initial temperature control adjustment strategy of each gear, the terminal selects the initial temperature control adjustment strategy corresponding to each temperature control duration in the temperature control duration range from the temperature control adjustment database.

[0120] Step S122: Based on the temperature control resource regulation information, the current temperature control regulation strategy of the energy storage system is selected from the initial temperature control regulation strategies matched by the energy storage system.

[0121] In this embodiment, the terminal evaluates the energy consumption cost of each initial temperature control adjustment strategy matched by the energy storage system based on the temperature control resource control information, and selects the strategy with the lowest energy consumption cost and the least impact on the equipment under the premise of meeting the temperature control requirements. If multiple strategies are similar in energy consumption and cost, the terminal selects the strategy that can quickly reach the preset temperature to reduce the temperature control time.

[0122] Based on the above scheme, after screening the initial temperature control adjustment strategy matching the energy storage system in the temperature control adjustment database, the current temperature control adjustment strategy of the energy storage system is screened out according to the temperature control resource regulation information, and the temperature control adjustment strategy with high energy efficiency ratio is selected, thereby improving the energy utilization efficiency and ensuring that the selected current temperature control adjustment strategy not only meets the temperature control requirements of the energy storage system, but can also be effectively implemented under actual conditions, thereby improving the overall performance and operation efficiency of the energy storage system.

[0123] In one embodiment, if Figure 4 As shown, step S122: based on the temperature control resource regulation information, the current temperature control regulation strategy of the energy storage system is screened from the initial temperature control regulation strategies matched by the energy storage system, including steps S1221 to S1225:

[0124] Step S1221: identifying the current interval of temperature control resource regulation information;

[0125] 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, wherein the low electricity price interval refers to a period of time when electricity demand is low and electricity prices are relatively cheap, which is suitable for high-energy consumption temperature control operations to reduce costs.

[0126] If the terminal recognizes that the current interval of the temperature control resource regulation information is the target interval, the process proceeds to step S1222, and the terminal continues to select the temperature control adjustment strategy according to the remaining duration of the target interval and the temperature control demand.

[0127] If the terminal recognizes that the current interval of the temperature control resource regulation information is a non-target interval, the process proceeds to step S1225.

[0128] Step S1222: when the current interval is the target interval, determining the remaining duration of the target interval;

[0129] 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 time 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 a 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.

[0130] After the terminal determines the remaining time of the target interval, it can select the temperature control adjustment strategy that best suits the current low electricity price interval based on the remaining time of the target interval. If the remaining time is short, the terminal selects a strategy that can quickly reach the preset temperature; if the remaining time is long, the terminal can select a more energy-saving and economical strategy.

[0131] Step S1223: according to the remaining duration of the target interval, the temperature control adjustment range corresponding to the remaining duration of the target interval is identified through the resource adaptation strategy, and 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 are identified;

[0132] In this embodiment, the terminal identifies the temperature control adjustment range corresponding to the remaining duration of the target interval according to the remaining duration of the target interval through a 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.

[0133] The terminal calculates the deviation between the current temperature of the energy storage system and the preset temperature, and the deviation between the ambient temperature associated with the energy storage system and the preset temperature.

[0134] The terminal determines the temperature control rate range corresponding to the remaining time of the target interval according to the thermal 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 time 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 a specific device.

[0135] In this embodiment, the terminal can calculate the temperature change curve of the immersion liquid at different temperature control rates by analyzing the heat capacity, heat conduction efficiency and other parameters of the immersion liquid of the system, and determine the temperature control rate range that the system can achieve within the remaining time 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, and the terminal calculates the temperature control rate range of the system in actual operation based on these data, and verifies and optimizes it.

[0136] The terminal identifies 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. 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 range that can be adjusted when the temperature control system starts working. This range will also vary depending on the strategy. The working mode or intensity level of the initial temperature control adjustment strategy of different gears is different, and each gear has its own specific temperature control rate and adjustment range.

[0137] Step S1224: based on the temperature control adjustment range, each initial temperature control rate range, and each initial temperature control adjustment range, the current temperature control adjustment strategy of the energy storage system is screened from each initial temperature control adjustment strategy;

[0138] In this embodiment, the terminal determines whether each initial temperature control adjustment strategy can complete temperature management in the remaining time of the target interval according to the temperature control adjustment range corresponding to the remaining time 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 time among the initial temperature control adjustment strategies of multiple gears as the current temperature control adjustment strategy. After determining the current temperature control adjustment strategy, the current temperature control adjustment strategy is executed with the preset temperature as the target. If not, the terminal redetermines the preset temperature according to the temperature control adjustment range corresponding to the remaining time, and the terminal screens the temperature control adjustment strategy according to the redetermined preset temperature. In this embodiment, the terminal can automatically identify and apply the initial temperature control adjustment strategy that best suits the requirements of the energy storage system and its associated ambient temperature through a built-in intelligent algorithm or preset program logic.

[0139] For example, the energy storage system matches the refrigeration type 2-speed initial temperature control adjustment strategy and the 3-speed initial temperature control adjustment strategy, but the remaining time of the target interval is only 20 minutes, and the 2-speed and 3-speed initial temperature control adjustment strategies cannot complete the temperature control management within the remaining time. The terminal obtains the temperature control adjustment range corresponding to the remaining time of the target interval, and the temperature control adjustment range corresponding to 20 minutes is 5℃-10℃. 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 2-speed and 3-speed initial temperature control adjustment strategies both meet the temperature control adjustment range corresponding to the remaining time. However, the initial temperature control rate range of the 2-speed initial temperature control adjustment strategy is higher than that of the 3-speed initial temperature control adjustment strategy. It can be understood that the 2-speed initial temperature control adjustment strategy is a strategy of rapid temperature control at a high temperature control rate and then gentle temperature control at a low temperature control rate. The 3-speed initial temperature control adjustment strategy is a strategy of stable temperature control at a fixed temperature control rate. In this case, combined with the remaining time, the terminal selects the 2-speed initial temperature control adjustment strategy instead of the higher-power 3-speed initial temperature control adjustment strategy.

[0140] Step S1225: When the current interval is a non-target interval, the energy storage system is temperature controlled based on a preset temperature control adjustment strategy.

[0141] 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 on the energy storage system. The preset temperature control adjustment strategy can be set by the user or administrator when the system is initialized, or can be optimized based on the system default settings or historical data.

[0142] 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 the temperature control device (such as a liquid cooling unit), adjusting the power output of the temperature control system, etc.

[0143] Based on the above scheme, by selecting the most appropriate temperature control adjustment strategy according to the remaining time of the target interval, temperature control operations are performed in the target interval, making full use of the time periods with low electricity demand and cheap electricity prices, and significantly reducing the temperature control cost of the energy storage system; when the remaining time of the target interval is insufficient, the terminal accurately calculates the remaining time of the target interval and the corresponding temperature control adjustment range, and selects the appropriate temperature control strategy, thereby avoiding ineffective temperature control and energy waste, and improving the energy efficiency of temperature control operations. The terminal can be flexibly adjusted and optimized according to actual needs to adapt to different energy storage systems, different ambient temperature conditions, and changes in different electricity price policies, and also improves the intelligence level of temperature control management and the stability of the system.

[0144] In this embodiment, step S130 is based on stopping 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 is changed to a 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 an upload operation of a stop temperature control instruction.

[0145] When the terminal detects that the energy storage system changes from a non-charging and discharging state to a charging and discharging state, in order to avoid potential interference between the temperature control process and the charging and discharging 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 achieved, and the terminal stops the temperature control process. The terminal receives a stop temperature control instruction from the superior 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.

[0146] Alternatively, after receiving the instruction to stop temperature control, the terminal performs a confirmation step to verify the validity of the instruction to stop temperature control, which can be achieved by verifying the source, format, authority, etc. of the instruction. The instruction is confirmed to be valid, and the terminal performs the operation of stopping temperature control, including shutting down 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 superior management system or user, which is helpful for subsequent system monitoring, troubleshooting and performance optimization.

[0147] Based on the above scheme, when the terminal receives the instruction to stop temperature control, it stops the temperature control process of the energy storage system, which can ensure that the temperature control process of the energy storage system is stopped at an appropriate time while maintaining the safety and stability of the energy storage system.

[0148] In one of the embodiments, after the energy storage system is temperature controlled based on the current temperature control regulation strategy, the current interval of the temperature control resource regulation information is identified, and at the change time point when the current interval is changed to a non-target interval, the current temperature control regulation strategy is changed to a preset temperature control regulation strategy, and the energy storage system is temperature controlled based on the preset temperature control regulation strategy.

[0149] In this embodiment, while the terminal performs temperature control processing 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 the non-target interval (peak 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.

[0150] Based on the above scheme, when the terminal changes the current interval to a non-target interval, the preset temperature control adjustment strategy is used to replace the current temperature control adjustment strategy, thereby ensuring the continuity of the temperature control processing.

[0151] In one of the embodiments, based on the current temperature control adjustment strategy, the energy storage system is temperature controlled to obtain new temperature distribution information of the energy storage system, including: starting a temperature control device (such as a liquid cooling unit) and operating the temperature control device according to the current temperature control adjustment strategy.

[0152] In one embodiment, step S121 calculates the temperature control duration range corresponding to the energy storage system through a temperature control duration algorithm, and further includes: determining a power compensation coefficient according to a 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:

[0153]

[0154] Where, t is the temperature control time; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion fluid; c co is the specific heat capacity of the immersion fluid; 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 of the battery pack; t ais the ambient temperature; h is the ambient convection heat transfer coefficient; A is the total area of ​​the outer wall of the battery pack; P is the temperature control power; k is the power compensation coefficient.

[0155] It is understandable that various factors, such as aging of the temperature control device, changes in ambient temperature, and changes in the internal state of the energy storage system, may cause a difference between the actual power of the temperature control device and the calibrated power of each initial temperature control adjustment strategy.

[0156] In this embodiment, the terminal may 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 of the historical temperature control of the temperature control device.

[0157] Based on the above scheme, 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. This can improve the accuracy of the calculation results and obtain a temperature control duration range that is closer to the actual situation, which is conducive to improving the efficiency and accuracy of temperature control processing.

[0158] In one of the embodiments, step S121 calculates the temperature control time range corresponding to the energy storage system through a temperature control time algorithm, and also includes: determining whether the deviation value between the temperature information of the energy storage system and the preset temperature is within a 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 excess value into the temperature control time algorithm to calculate the temperature control time range corresponding to the energy storage system.

[0159] The terminal can set a safe range of the battery cell's temperature as a preset range. The terminal can set the preset range of the battery cell's temperature based on the thermal characteristics of the battery cell. If the minimum deviation value between the battery cell's temperature and the optimal storage temperature range is greater than the preset range, the system considers that the battery cell is in a dangerous state.

[0160] In one embodiment, when the temperature of the battery cell is higher than the optimal storage temperature range and the deviation between the temperature of the battery cell and the optimal storage temperature range exceeds a preset range, the excess value is substituted into the temperature control duration algorithm to calculate the temperature control duration range corresponding to the energy storage system. The formula is as follows:

[0161]

[0162] Where, t is the temperature control time; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion fluid; c co is the specific heat capacity of the immersion fluid; 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 of the battery pack; t a is the ambient temperature; h is the ambient convection heat transfer coefficient; A is the total area of ​​the outer wall of the battery pack; P is the temperature control power; a is the excess value.

[0163] In one embodiment, when the temperature of the battery cell is lower than the optimal storage temperature range and the deviation between the temperature of the battery cell and the optimal storage temperature range exceeds a preset range, the excess value is substituted into the temperature control duration algorithm to calculate the temperature control duration range corresponding to the energy storage system. The formula is as follows:

[0164]

[0165] Where, t is the temperature control time; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion fluid; c co is the specific heat capacity of the immersion fluid; 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 of the battery pack; t a is the ambient temperature; h is the ambient convection heat transfer coefficient; A is the total area of ​​the outer wall of the battery pack; P is the temperature control power; b is the excess value.

[0166] Based on the above solution, the terminal compensates the preset temperature by the deviation value of the battery cell temperature exceeding the preset range and substitutes it into the temperature control duration algorithm, making full use of the thermal inertia of the battery cell, improving the accuracy and efficiency of the battery cell temperature control, and helping to ensure the safety and performance of the battery cell.

[0167] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0168] Based on the same inventive concept, the embodiment of the present application also provides an intelligent temperature control device for an energy storage system for implementing the intelligent temperature control method for an energy storage system involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of the intelligent temperature control device for one or more energy storage systems provided below can refer to the limitations of the intelligent temperature control method for an energy storage system above, and will not be repeated here.

[0169] In an exemplary embodiment, Figure 5 As 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, wherein:

[0170] The acquisition module 310 is used 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;

[0171] A generation module 320 is used 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 when the temperature control start time point is met, the energy storage system is temperature controlled based on the current temperature control adjustment strategy to obtain new temperature distribution information of the energy storage system;

[0172] The temperature control module 330 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, return to execute the steps 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 receiving the stop temperature control instruction, and stop the temperature control processing process of the energy storage system.

[0173] In one embodiment, the acquisition module 310 is specifically configured to:

[0174] Identify the current execution status of the historical temperature control strategy, and if the current execution status is executed, use the current time point as the temperature control start time point of the energy storage system;

[0175] The historical temperature control strategy is used as the temperature control adjustment strategy of the energy storage system, and when the temperature control start time point is met, the energy storage system is temperature controlled based on the temperature control adjustment strategy to obtain new temperature distribution information of the energy storage system;

[0176] When the current execution state is not executed, determine whether the current working state of the energy storage system is a charging and discharging state, and when the current working state of the energy storage system is a charging and discharging state, use 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;

[0177] When the current working state of the energy storage system is not the charging and discharging state, the current time point is used as the temperature control start time point of the energy storage system.

[0178] In one embodiment, the generating module 320 is specifically configured to:

[0179] 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, the temperature control time range corresponding to the energy storage system is calculated through the temperature control time algorithm, and based on the temperature control time range, the initial temperature control adjustment strategy matching the energy storage system is screened in the temperature control adjustment database;

[0180] Based on the temperature control resource regulation information, the current temperature control regulation strategy of the energy storage system is screened from the initial temperature control regulation strategies matched by the energy storage system.

[0181] In one embodiment, the temperature control duration algorithm is:

[0182]

[0183] Where, t is the temperature control time; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion fluid; c co is the specific heat capacity of the immersion fluid; 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 of the battery pack; t a is the ambient temperature; h is the ambient convection heat transfer coefficient; A is the total area of ​​the outer wall of the battery pack; P is the temperature control power.

[0184] In one embodiment, the generating module 320 is specifically configured to:

[0185] Identify the current interval of temperature control resource regulation information;

[0186] When the current interval is the target interval, determining the remaining duration of the target interval;

[0187] According to the remaining duration of the target interval, the temperature control adjustment range corresponding to the remaining duration of the target interval is identified through the resource adaptation strategy, and 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 are identified;

[0188] Based on the temperature control adjustment range, each initial temperature control rate range, and each initial temperature control adjustment range, selecting a current temperature control adjustment strategy of the energy storage system from each initial temperature control adjustment strategy;

[0189] When the current interval is not the target interval, the energy storage system is temperature controlled based on the preset temperature control adjustment strategy.

[0190] In one embodiment, the generating module 320 is specifically configured to:

[0191] According to the remaining duration of the target interval, the temperature control adjustment range corresponding to the remaining duration of the target interval is identified through the resource adaptation strategy, including:

[0192] According to the deviation value between the temperature information of the energy storage system and the preset temperature, 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 time of the target interval, the temperature control adjustment range corresponding to the remaining time of the target interval is calculated.

[0193] In one embodiment, the temperature control module 330 is specifically used for:

[0194] When the current working state of the energy storage system is changed to the charging and discharging state, the temperature control process of the energy storage system is stopped;

[0195] When the ambient temperature information associated with the energy storage system reaches a preset temperature and a temperature control stop instruction is received, the temperature control process of the energy storage system is stopped;

[0196] And / or, in response to the upload operation of stopping the temperature control instruction, the temperature control processing of the energy storage system is stopped.

[0197] In one embodiment, the generating module 320 is specifically configured to:

[0198] After the energy storage system is temperature controlled based on the current temperature control regulation 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 regulation strategy is changed to a preset temperature control regulation strategy, and the energy storage system is temperature controlled based on the preset temperature control regulation strategy.

[0199] Each module in the intelligent temperature control device of the energy storage system can be implemented in whole or in part by software, hardware and their combination. Each module can be embedded in or independent of the processor in the energy storage system in the form of hardware, or can be stored in the memory of the energy storage system in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0200] In a third aspect, the present application provides an energy storage system, which may be a terminal. The energy storage system includes a memory and a processor. The memory stores a computer program. 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.

[0201] The internal structure diagram of the energy storage system can be shown as follows Figure 6 As shown. The energy storage system includes a processor, a memory, an input / output interface (Input / Output, referred to 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 an external device. 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, an intelligent temperature control method for an energy storage system is implemented.

[0202] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the scheme of the present application, and does not constitute a limitation on the energy storage system to which the scheme 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 certain components, or have a different arrangement of components.

[0203] It should be noted that the information (including but not limited to energy storage system information) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0204] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and 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-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0205] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0206] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An intelligent temperature control method for an energy storage system, characterized in that: include: Acquire 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 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; Based on the current temperature distribution information associated with the energy storage system and the current temperature control resource regulation information, a current temperature control adjustment strategy of the energy storage system is generated, and when the temperature control start time point is met, the energy storage system is temperature controlled based on the current temperature control adjustment strategy to obtain new temperature distribution information of the energy storage system; Re-collect new temperature control resource regulation information, and replace the current temperature distribution information with the new temperature distribution information, and replace the current temperature control resource regulation information with the new temperature control resource regulation information, and return to 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 the temperature control processing process of the energy storage system is stopped; The generating a 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: 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, a temperature control time range corresponding to the energy storage system is calculated through a temperature control time algorithm, and based on the temperature control time range, an initial temperature control adjustment strategy matching the energy storage system is screened in a temperature control adjustment database; Based on the current temperature control resource regulation information, the current temperature control regulation strategy of the energy storage system is screened from the initial temperature control regulation strategies matched by the energy storage system.

2. The intelligent temperature control method for energy storage system according to claim 1, characterized in that: The 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: Identify the current execution state of the historical temperature control strategy, and when the current execution state is executed, use the current time point as the temperature control start time point of the energy storage system; The historical temperature control strategy is used as the temperature control adjustment strategy of the energy storage system, and when the temperature control start time point is met, the energy storage system is temperature controlled based on the temperature control adjustment strategy to obtain new temperature distribution information of the energy storage system; When the current execution state is not executed, determine whether the current working state of the energy storage system is a charging and discharging state, and when the current working state of the energy storage system is a charging and discharging state, use 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 charging and discharging state, the current time point is used as the temperature control start time point of the energy storage system.

3. The intelligent temperature control method for energy storage system according to claim 1, characterized in that: The temperature control duration algorithm is: Where, t is the temperature control time; T target is the preset temperature; T avgco is the average temperature of the immersion liquid; m co is the mass of the immersion fluid; c co is the specific heat capacity of the immersion fluid; 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 of the battery pack; t a is the ambient temperature; h is the ambient convection heat transfer coefficient; A is the total area of ​​the outer wall of the battery pack; P is the temperature control power.

4. The intelligent temperature control method for energy storage system according to claim 1, characterized in that: The step of screening the current temperature control regulation strategy of the energy storage system from among the initial temperature control regulation strategies matched by the energy storage system based on the current temperature control resource regulation information includes: Identifying a current interval of the temperature control resource regulation information; If the current interval is a target interval, determining a remaining duration of the target interval; According to the remaining duration of the target interval, identifying the temperature control adjustment range corresponding to the remaining duration of the target interval through the resource adaptation strategy, 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 a 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, the energy storage system is temperature controlled based on a preset temperature control adjustment strategy.

5. The intelligent temperature control method for energy storage system according to claim 4, characterized in that: The step of identifying the temperature control adjustment range corresponding to the remaining duration of the target interval through a resource adaptation strategy according to the remaining duration of the target interval includes: According to the deviation value between the temperature information of the energy storage system and the preset temperature, 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 time of the target interval, the temperature control adjustment range corresponding to the remaining time of the target interval is calculated.

6. The intelligent temperature control method for energy storage system according to claim 4, characterized in that: The process of stopping the temperature control processing of the energy storage system until a temperature control stop instruction is received includes: When the current working state of the energy storage system is changed to a charging and discharging 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 temperature control stop instruction is received, stopping the temperature control process of the energy storage system; And / or, in response to the upload operation of stopping the temperature control instruction, stopping the temperature control processing process of the energy storage system.

7. The intelligent temperature control method for energy storage system according to claim 4, characterized in that: After the energy storage system is temperature controlled based on the current temperature control regulation strategy, the current interval of the temperature control resource regulation information is identified, and at the change time point when the current interval is changed to a non-target interval, the current temperature control regulation strategy is changed to a preset temperature control regulation strategy, and the energy storage system is temperature controlled based on the preset temperature control regulation strategy.

8. An intelligent temperature control device for an energy storage system, characterized in that: The device comprises: An acquisition module, used to acquire 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 current temperature control resource regulation information, and identify a 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 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 to 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; A 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, 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, and stop the temperature control processing process of the energy storage system when a stop temperature control instruction is received; Wherein, the generating module is used for: 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, a temperature control time range corresponding to the energy storage system is calculated through a temperature control time algorithm, and based on the temperature control time range, an initial temperature control adjustment strategy matching the energy storage system is screened in a temperature control adjustment database; Based on the current temperature control resource regulation information, the current temperature control regulation strategy of the energy storage system is screened from the initial temperature control regulation strategies matched by the energy storage system.

9. An energy storage system, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

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