Thermal regulation method of energy storage system, electronic equipment and computer medium
By detecting the operating mode and status of the energy storage system and setting a temperature regulation strategy, the problem of inappropriate temperature in the energy storage system was solved, precise temperature control was achieved, and the safety and efficiency of the system were improved.
Patent Information
- Application Number
- CN202411094373.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2026-02-10
AI Technical Summary
Excessive or insufficient temperature in energy storage systems can affect cell performance and safety. Existing technologies make it difficult to precisely regulate temperature, leading to potential damage and safety incidents.
By detecting the operating mode, working status, and cell temperature of the energy storage system, different temperature regulation strategies are set, including heating, cooling, or maintaining the cell temperature, to ensure that the temperature is within a suitable range.
It enables precise temperature regulation of the energy storage system, avoiding damage and safety accidents caused by improper temperature, and improving the safety and efficiency of the system.
Smart Images
Figure CN121507221A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of thermal management technology for energy storage systems, and in particular to a thermal regulation method, electronic device, and computer medium for energy storage systems. Background Technology
[0002] With the continuous development of new energy technology, energy storage systems are being widely used in more and more fields. During peak electricity price periods, the energy storage system discharges; during off-peak periods, it charges. Arbitrage is achieved by exploiting the peak-valley electricity price difference, thereby saving users on electricity bills.
[0003] The normal operating temperature of energy storage systems is typically between -20℃ and 45℃. Excessively high or low temperatures can negatively impact the performance and lifespan of the battery cells within the system. Excessively high temperatures can alter the cell structure, leading to a decrease in cell lifespan and potentially triggering thermal runaway, causing safety incidents. Conversely, excessively low temperatures reduce the usable capacity of the cells, degrade performance, and increase the risk of lithium plating during charging, potentially causing internal short circuits and thermal runaway failures. Therefore, preventing excessively high or low temperatures from affecting the safety of energy storage systems has become a hot research topic. Summary of the Invention
[0004] This invention proposes a thermal regulation method, electronic device, and computer medium for energy storage systems to address the problem of excessively high or low temperatures affecting the safety of energy storage systems.
[0005] The technical solution of this invention: a thermal regulation method for an energy storage system, used to regulate the temperature of a battery cell within the energy storage system, the method comprising: acquiring the battery cell temperature; obtaining the current operating mode of the energy storage system, wherein the operating mode includes a charge / discharge mode and a static mode; detecting whether the operating mode is the charge / discharge mode or the static mode; if the operating mode is detected to be the charge / discharge mode, detecting whether the current operating state of the energy storage system is in an abnormal operating state; determining a first temperature regulation strategy for the battery cell based on the detection result of the operating state and the battery cell temperature; if the operating mode is detected to be the static mode, detecting whether the current operating state of the energy storage system is in the abnormal operating state; detecting whether the battery cell has a charge / discharge requirement based on the detection result of the operating state; if the battery cell has a charge / discharge requirement, determining a second temperature regulation strategy for the battery cell based on the charge / discharge requirement and the battery cell temperature.
[0006] Compared with related technologies, the embodiments of this application have at least the following advantages:
[0007] This application avoids the problem of inaccurate detection results and failure to adjust the energy storage system temperature in time, which can lead to damage, by simultaneously detecting the cell temperature, the operating mode and working status of the energy storage system, and whether the cell has charging and discharging requirements.
[0008] In some embodiments, the charge / discharge mode includes a charging mode, the abnormal operating state includes an operational fault and a thermal runaway fault, and the first temperature regulation strategy includes increasing the cell temperature; the cell temperature acquisition includes: acquiring the cell temperature at preset intervals; if the operating mode is detected to be the charge / discharge mode, detecting whether the current operating state of the energy storage system is in an abnormal operating state includes: if the operating mode is detected to be the charging mode, detecting whether the current operating state of the energy storage system is in the operational fault and / or the thermal runaway fault; the determination of the first temperature regulation strategy for the cell based on the detection result of the operating state and the cell temperature includes: if the operating state does not have the operational fault and the thermal runaway fault, detecting whether the lowest temperature among all the cell temperatures acquired within the preset interval is less than a first low temperature threshold; if the lowest temperature is detected to be less than the first low temperature threshold, the first temperature regulation strategy is to increase the cell temperature.
[0009] In some embodiments, the charge / discharge mode includes a discharge mode, the abnormal operating state includes an operational fault and a thermal runaway fault, and the first temperature regulation strategy includes increasing the cell temperature; the cell temperature acquisition includes: acquiring the cell temperature at preset intervals; if the operating mode is detected to be the charge / discharge mode, detecting whether the current operating state of the energy storage system is in an abnormal operating state includes: if the operating mode is detected to be the discharge mode, detecting whether the current operating state of the energy storage system is in the operational fault and / or the thermal runaway fault; if the operating state does not have the operational fault and the thermal runaway fault, detecting whether the lowest temperature among all the cell temperatures acquired within the preset interval is less than a second low temperature threshold; the determination of the first temperature regulation strategy for the cell based on the detection result of the operating state and the cell temperature includes: if the lowest temperature is detected to be less than the second low temperature threshold, the first temperature regulation strategy is to increase the cell temperature.
[0010] In some embodiments, the abnormal operating state includes operational failure and thermal runaway failure, and the first temperature regulation strategy includes reducing the cell temperature; the cell temperature acquisition includes: acquiring the cell temperature at preset intervals; if the operating mode is detected to be the charge / discharge mode, detecting whether the current operating state of the energy storage system is in an abnormal operating state includes: if the operating mode is detected to be the charge / discharge mode, detecting whether the current operating state of the energy storage system is in the operational failure and / or the thermal runaway failure; the determination of the first temperature regulation strategy for the cell based on the detection result of the operating state and the cell temperature includes: if the thermal runaway failure is detected in the operating state, detecting whether the highest temperature among all the cell temperatures acquired within the preset interval is greater than a first high temperature threshold; if the highest temperature is detected to be greater than the first high temperature threshold, the first temperature regulation strategy is to reduce the cell temperature.
[0011] In some embodiments, the energy storage system includes a battery system, the battery system including the battery cells; the first temperature regulation strategy includes maintaining the cell temperature, and the abnormal operating state includes operational failure and thermal runaway failure; the step of collecting the cell temperature includes: collecting the cell temperature at preset intervals; collecting the inlet temperature at the water inlet of the battery system; the step of detecting whether the current operating state of the energy storage system is in an abnormal operating state if the operating mode is detected to be the charge / discharge mode includes: if the operating mode is detected to be the charge / discharge mode, detecting whether the current operating state of the energy storage system is in the operational failure and / or thermal runaway failure state. The step of determining a first temperature regulation strategy for the battery cell based on the detection results of the operating state and the cell temperature includes: if the operating state does not have the operating fault and the thermal runaway fault, calculating a temperature difference; wherein the temperature difference is the difference between the lowest and highest temperatures among all the cell temperatures collected within the preset period; detecting whether the temperature difference is greater than a first temperature difference threshold; if the temperature difference is greater than the first temperature difference threshold, detecting whether the inlet temperature is within a preset inlet temperature range; if the inlet temperature is within the preset inlet temperature range, the first temperature regulation strategy is to maintain the cell temperature.
[0012] In some embodiments, the abnormal operating state includes operational failure and thermal runaway failure, the second temperature regulation strategy includes increasing the cell temperature, and the charge / discharge demand includes charging demand and discharging demand; the collection of the cell temperature includes: collecting the cell temperature of the cell at preset intervals; if the operating mode is detected to be the idle mode, detecting whether the current operating state of the energy storage system is in the abnormal operating state includes: if the operating mode is detected to be the idle mode, detecting whether the current operating state of the energy storage system is in the operational failure and / or the thermal runaway failure; based on the detection result of the operating state, detecting whether the cell has charge / discharge demand includes: if the current operating state of the energy storage system does not have the operational failure and the thermal runaway failure, detecting whether the cell has charge / discharge demand; based on the charge / discharge demand and the cell temperature, determining the second temperature regulation strategy of the cell includes... The method includes: acquiring the charge / discharge start-up duration, which is the time interval between the current time point and the time point when the charge / discharge demand of the battery cell is activated; detecting whether the charge / discharge start-up duration is less than a preset start-up interval and whether the charge / discharge demand is the charging demand or the discharging demand; if the charge / discharge start-up duration is less than the preset start-up interval and the charge / discharge demand is the charging demand, detecting whether the lowest temperature among all the battery cell temperatures collected within the preset period is less than a first low temperature threshold; if the lowest temperature among all the battery cell temperatures collected within the preset period is less than the first low temperature threshold, the second temperature adjustment strategy is to increase the battery cell temperature; if the charge / discharge start-up duration is less than the preset start-up interval and the charge / discharge demand is the discharging demand, detecting whether the lowest temperature is less than a second low temperature threshold; if the lowest temperature is less than the second low temperature threshold, the second temperature adjustment strategy is to increase the battery cell temperature.
[0013] In some embodiments, the second temperature regulation strategy further includes reducing the cell temperature; the step of detecting whether the cell has a charging and discharging requirement based on the detection result of the working state further includes: if the thermal runaway fault is detected in the working state, detecting whether the highest temperature among all the cell temperatures collected within the preset period is greater than a first high temperature threshold; if the highest temperature is detected to be greater than the first high temperature threshold, the second temperature regulation strategy is to reduce the cell temperature.
[0014] In some embodiments, the energy storage system includes a battery system, the battery system including the battery cell; the second temperature regulation strategy includes maintaining the cell temperature, the abnormal operating state includes operational failure and thermal runaway failure; the step of collecting the cell temperature includes: collecting the cell temperature at preset intervals; collecting the inlet temperature at the water inlet of the battery system; the step of detecting whether the current operating state of the energy storage system is in an abnormal operating state if the operating mode is detected to be the static mode includes: if the operating mode is detected to be the static mode, detecting whether the current operating state of the energy storage system is in the operational failure and / or the thermal runaway failure; the step of detecting whether the cell has Given the charging and discharging requirements, and based on the charging and discharging requirements and the cell temperature, a second temperature regulation strategy for the cell is determined, including: if it is detected that the current operating state of the energy storage system does not have the operational fault or the thermal runaway fault, calculating a temperature difference; wherein, the temperature difference is the difference between the lowest and highest temperatures among all cell temperatures collected within the preset period; detecting whether the temperature difference is greater than a first temperature difference threshold; if it is detected that the temperature difference is greater than the first temperature difference threshold, detecting whether the inlet temperature is within a preset inlet temperature range; if it is detected that the inlet temperature is within the preset inlet temperature range, the second temperature regulation strategy is to maintain the cell temperature.
[0015] One embodiment of this application also provides an electronic device, including a processor and a memory, wherein the memory is used to store instructions, and the processor is used to call the instructions in the memory to cause the electronic device to perform the energy storage system thermal regulation method as described above.
[0016] One embodiment of this application also provides a computer-readable storage medium that stores computer instructions that, when executed on an electronic device, cause the electronic device to perform the above-described energy storage system thermal regulation method.
[0017] Understandably, the electronic device of the second aspect and the computer storage medium of the third aspect provided above correspond to the method of the first aspect. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods provided above, and will not be repeated here. Attached Figure Description
[0018] Figure 1 This is a flowchart of the steps of a thermal regulation method for an energy storage system according to an embodiment of this application.
[0019] Figure 2 This is a flowchart illustrating the steps for turning on or off cell heating in a charging / discharging mode, as provided in an embodiment of this application.
[0020] Figure 3 This is a flowchart illustrating the steps of turning on or off cell cooling according to one embodiment of this application.
[0021] Figure 4 This is a flowchart illustrating the steps of turning on or off cell heating in a static mode according to one embodiment of this application.
[0022] Figure 5 This is a flowchart illustrating the steps for maintaining the cell temperature according to one embodiment of this application.
[0023] Figure 6 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application.
[0024] Explanation of main component symbols
[0025] 1000 electronic devices
[0026] Processor 1001
[0027] Memory 1002
[0028] Computer Program 1003 Detailed Implementation
[0029] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0030] The following description sets forth many specific details to provide a full understanding of this application. The described embodiments are only some, not all, of the embodiments of this application.
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.
[0032] It should be further noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0033] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and drawings of this application are used to distinguish similar objects, not to describe a specific order or sequence.
[0034] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.
[0035] The thermal regulation method for energy storage systems disclosed in this application is used to regulate the temperature of battery cells within the energy storage system. The energy storage system includes a battery system, which comprises battery cells.
[0036] like Figure 1 The diagram shown is a flowchart illustrating the steps of an embodiment of the thermal regulation method for an energy storage system according to this application. The order of the steps in the flowchart can be changed, and some steps can be omitted, depending on different requirements.
[0037] See Figure 1 As shown, the thermal regulation method for an energy storage system may include the following steps.
[0038] Step S101: Collect the cell temperature of the battery cell.
[0039] In some embodiments, the cell temperature is collected at preset intervals. The temperature may differ at different collection points within the preset interval. Therefore, multiple cell temperature values are collected within the preset interval. The lowest temperature among all cell temperatures collected within the preset interval is recorded as the lowest cell temperature. The highest temperature among all cell temperatures collected within the preset interval is recorded as the highest cell temperature. The preset interval can be 1 minute, 2 minutes, or 5 minutes, etc., and can be set according to actual needs.
[0040] In some embodiments, it is also necessary to collect the inlet temperature at the battery system's water inlet. The inlet temperature refers to the temperature at the battery system's water inlet. In this embodiment, multiple inlet temperatures can be collected within a preset period, and the minimum temperature value among the multiple inlet temperatures can be used as the final inlet temperature. Alternatively, the maximum temperature value among the multiple inlet temperatures can be used as the final inlet temperature. Or, the average temperature value among the multiple inlet temperatures can be used as the final inlet temperature. In other embodiments, the inlet temperature at a specific point in time can also be obtained. This application does not limit this.
[0041] Step S102: Obtain the current operating mode of the energy storage system.
[0042] In some embodiments, the operating modes include a charge / discharge mode and a standby mode.
[0043] In some embodiments, the charging and discharging modes include a charging mode and a discharging mode. When the user needs to use electrical energy, the energy storage system discharges; in this case, the energy storage system operates in discharging mode. When the user does not need to use electrical energy and the energy storage system has insufficient charge, the energy storage system charges; in this case, the energy storage system operates in charging mode. Alternatively, when the user does not need to use electrical energy and the energy storage system has sufficient charge, the energy storage system is in a quiescent mode.
[0044] Step S103: Detect whether the operating mode is charging / discharging mode or static mode.
[0045] Specifically, it checks whether the operating mode is charging mode, discharging mode, or idle mode.
[0046] Step S104: If the operating mode is detected to be charging and discharging mode, check whether the current working state of the energy storage system is in an abnormal working state.
[0047] In some embodiments, when the energy storage system operates in charge / discharge mode, it indicates that the battery cells within the system are charging or discharging. Since charging or discharging causes the battery cell temperature to rise, to prevent the battery cell temperature from continuously rising and affecting the safety of the energy storage system, the system first checks if it is in charge or discharge mode before detecting any abnormal operating conditions. In this embodiment, the energy storage system also includes a temperature control system. The temperature control system is used to regulate the temperature of the battery cells. For example, it can heat the battery cells or cool the battery.
[0048] In this embodiment, abnormal operating states include operational faults and thermal runaway faults. Further detection is needed to determine whether the energy storage system is currently experiencing an operational fault or a thermal runaway fault. Detecting whether the energy storage system is experiencing an operational fault includes detecting whether the energy storage system is experiencing an operational fault or other high-voltage faults besides thermal runaway.
[0049] Step S105: Based on the detection results of the working status and the cell temperature, determine the first temperature regulation strategy for the cell.
[0050] In some embodiments, the detection results of the operating state include the energy storage system currently being in an operational fault state, the energy storage system currently being in a thermal runaway fault state, and the energy storage system currently not being in an operational fault or a thermal runaway fault state. The first temperature regulation strategy includes increasing the cell temperature, decreasing the cell temperature, and maintaining the cell temperature. Wherein, when the first temperature regulation strategy is to increase the cell temperature, it indicates that the energy storage system needs to control the temperature control system to heat the cell. When the first temperature regulation strategy is to decrease the cell temperature, it indicates that the energy storage system needs to control the temperature control system to cool the cell. When the first temperature regulation strategy is to maintain the cell temperature, it indicates that the energy storage system needs to control the temperature control system to manage the cell, so that the cell temperature is maintained at the current temperature.
[0051] Due to differences in detection results and operating modes, the temperature regulation strategies for the battery cells also differ. Based on the first temperature regulation strategy, the temperature control system adjusts the temperature of the battery cells. The specific temperature regulation strategies for the battery cells will be described in detail later and will not be repeated here.
[0052] Step S106: If the operating mode is detected to be static mode, check whether the current working state of the energy storage system is in an abnormal working state.
[0053] Step S107: Based on the detection results of the working status, detect whether the battery cell has charging and discharging requirements.
[0054] In some embodiments, when the energy storage system operates in a static mode, a user may use the system after a certain period of time, causing the battery cells to charge or discharge. Therefore, it is necessary to detect whether the battery cells have charging or discharging needs. These charging and discharging needs include both charging and discharging requirements.
[0055] When the charge / discharge demand is "charging demand," it indicates that the battery cell needs to be charged. When the charge / discharge demand is "discharging demand," it indicates that the battery cell needs to be discharged.
[0056] Step S108: If the cell is detected to have charging and discharging requirements, determine the second temperature regulation strategy for the cell based on the detection results of the charging and discharging requirements and the cell temperature.
[0057] In some embodiments, the battery cell will be charged or discharged, and during this process, the cell will generate significant heat. If the cell temperature is high before charging or discharging begins, it will increase further afterward. This could lead to overheating, causing damage to the cell or even a fire.
[0058] Therefore, when a charging / discharging demand is detected in the battery cell, a second temperature regulation strategy needs to be determined based on the detection results of the charging / discharging demand and the cell temperature. The second temperature regulation strategy includes increasing the cell temperature, decreasing the cell temperature, and maintaining the cell temperature. Based on the second temperature regulation strategy, the temperature control system adjusts the cell temperature.
[0059] Compared to existing technologies, the embodiments of this application set different detection conditions based on the different operating modes of the energy storage system. On the one hand, this avoids the situation where the detection conditions are the same when the energy storage system is in charge / discharge mode and when it is in idle mode, resulting in inaccurate or erroneous detection results. This could lead to failure to adjust the cell temperature in time, causing damage to the energy storage system or even thermal runaway, thus triggering a safety accident. On the other hand, setting different detection conditions for different operating modes of the energy storage system enables timely adjustment of the cell temperature, improving the efficiency of adjustment and ensuring the safety of the energy storage system.
[0060] like Figure 2 The diagram shown is a flowchart illustrating the process of turning on or off cell heating during charging and discharging in an embodiment of this application. The specific steps are as follows:
[0061] Step S201: If the operating mode is detected to be charging mode, check whether there is an operating fault and / or thermal runaway fault in the working state.
[0062] Step S202: If no operational fault or thermal runaway fault is detected in the working state, check whether the lowest temperature of the battery cell is less than the first low temperature threshold.
[0063] In some embodiments, the first low temperature threshold can be 0°C. In other embodiments, the first low temperature threshold can also be 1°C, -1°C, or 2°C, depending on the actual detection requirements.
[0064] Step S203: If the lowest temperature of the battery cell is detected to be lower than the first low temperature threshold, the first temperature adjustment strategy is to increase the temperature of the battery cell.
[0065] In some embodiments, when the first temperature regulation strategy is to increase the cell temperature, the energy storage system controls the temperature control system to heat the cell.
[0066] Furthermore, when an operational malfunction or thermal runaway fault is detected, the energy storage system controls the temperature control system to shut down the heating of the battery cell. Alternatively, when the lowest temperature of the battery cell is detected to be greater than a third low-temperature threshold, the energy storage system also controls the temperature control system to shut down the heating of the battery cell. In this embodiment, the third low-temperature threshold is 10°C, which is greater than the first low-temperature threshold. In other embodiments, the third low-temperature threshold can also be 11°C, 9°C, or 12°C, depending on the actual detection requirements.
[0067] Step S204: If the operating mode is detected to be discharge mode, check whether there is an operating fault and / or thermal runaway fault in the working state.
[0068] Step S205: If no operational fault or thermal runaway fault is detected in the working state, check whether the lowest temperature of the battery cell is less than the second low temperature threshold.
[0069] In some embodiments, the second low-temperature threshold is less than the first low-temperature threshold. In this embodiment, the second low-temperature threshold is -20°C. In other embodiments, the second low-temperature threshold may also be -21°C, -19°C, or -22°C, depending on the actual detection requirements.
[0070] Step S206: If the lowest temperature of the battery cell is detected to be lower than the second low temperature threshold, the first temperature adjustment strategy is to increase the temperature of the battery cell.
[0071] In some embodiments, when an operational fault or thermal runaway fault is detected, the energy storage system controls the temperature control system to shut down the heating of the battery cell. Alternatively, when the minimum temperature of the battery cell is detected to be greater than a fourth low-temperature threshold, the energy storage system also controls the temperature control system to shut down the heating of the battery cell. The fourth low-temperature threshold is greater than the second low-temperature threshold.
[0072] Compared with existing technologies, the embodiments of this application set different detection conditions when the energy storage system is in charge / discharge or discharge mode. On the one hand, the charge / discharge detection results can be accurately obtained, allowing the energy storage system to adjust the cell temperature in a timely manner and ensure the safety of the energy storage system. On the other hand, when the operating state is a thermal runaway fault, the heating of the cell is shut off in time to prevent the cell temperature from further increasing and damaging the energy storage system.
[0073] like Figure 3 The diagram shown is a flowchart illustrating the process of turning the cell cooling on or off in charging / discharging mode and idle mode according to an embodiment of this application. The specific steps are as follows:
[0074] Step S301: Detect whether there are operational faults and / or thermal runaway faults in the working status.
[0075] Step S302: If a thermal runaway fault is detected in the working state, check whether the highest temperature of the battery cell is greater than the first high temperature threshold.
[0076] In this embodiment, the first high temperature threshold can be 50°C. In other embodiments, the first high temperature threshold can also be 45°C, 55°C, or 52°C, depending on the actual detection requirements.
[0077] Step S303: If the highest temperature of the battery cell is detected to be greater than the first high temperature threshold, the first temperature regulation strategy or the second temperature regulation strategy is to reduce the temperature of the battery cell.
[0078] In some embodiments, when the first temperature regulation strategy is to reduce the cell temperature, the energy storage system controls the temperature control system to cool the cell.
[0079] In other embodiments, if no operational fault is detected in the working state and the highest cell temperature is greater than the third high-temperature threshold, the first temperature regulation strategy is also to reduce the cell temperature. The energy storage system controls the temperature control system to cool the cell. The third high-temperature threshold can be 32°C. In other embodiments, the third high-temperature threshold can also be 30°C, 35°C, or 45°C, depending on the actual detection requirements. The third high-temperature threshold is lower than the first high-temperature threshold.
[0080] It should be noted that the setting of the third high-temperature threshold can vary depending on the operating mode of the energy storage system. For example, when the energy storage system is in charge / discharge mode, the third high-temperature threshold is set to 32°C. When the energy storage system is in idle mode, the third high-temperature threshold is set to 45°C.
[0081] In some embodiments, when the energy storage system is operating in charge / discharge mode, if an operational fault is detected or the highest cell temperature is detected to be lower than a second high-temperature threshold, the energy storage system controls the temperature control system to shut down and cool the cell. The second high-temperature threshold can be 28°C. In other embodiments, the second high-temperature threshold can also be 25°C, 30°C, or 27°C, depending on the actual detection requirements. The second high-temperature threshold is lower than the first high-temperature threshold.
[0082] In some embodiments, when the energy storage system is in idle mode, if an operational fault is detected or the highest cell temperature is detected to be lower than a fourth high-temperature threshold, the energy storage system controls the temperature control system to shut down and cool the cell. The fourth high-temperature threshold can be 35°C. The fourth high-temperature threshold is lower than the first high-temperature threshold. In other embodiments, the fourth high-temperature threshold can also be 32°C or 30°C, depending on the actual detection requirements.
[0083] Compared with existing technologies, the embodiments of this application simultaneously detect the operating mode, working status, and maximum cell temperature of the energy storage system. On the one hand, this allows for the precise determination of a first or second temperature regulation strategy, enabling the energy storage system to adjust the cell temperature in a timely manner and ensure the safety of the energy storage system. On the other hand, when the energy storage system is in a state of thermal runaway and the maximum cell temperature exceeds a first high-temperature threshold, the temperature control system is promptly activated to enable cell cooling, preventing thermal runaway from causing heat propagation.
[0084] like Figure 4 The diagram shown is a flowchart illustrating the steps for turning the battery cell heating on or off in a static mode according to an embodiment of this application. The specific steps are as follows:
[0085] Step S401: If no operational fault or thermal runaway fault is detected in the working state, obtain the charging and discharging start-up duration.
[0086] In some embodiments, the charge / discharge start-up duration is the time interval between the current time point and the time point when the charge / discharge demand of the battery cell is activated.
[0087] Step S402: Detect whether the charging / discharging start-up time is less than the preset start-up interval and whether the charging / discharging demand is a charging demand or a discharging demand.
[0088] In this embodiment, the preset opening interval can be 0.5h. In other embodiments, the preset opening interval can also be 1h or 2h. This application does not limit the specific value of the preset opening interval, and it can be set according to the actual detection requirements.
[0089] Step S403: If the charging / discharging start-up time is less than the preset start-up interval and the charging / discharging demand is a charging demand, check whether the lowest temperature of the battery cell is less than the first low temperature threshold.
[0090] Step S404: If the lowest temperature of the battery cell is detected to be lower than the first low temperature threshold, the second temperature adjustment strategy is to increase the temperature of the battery cell.
[0091] In this embodiment, if the lowest temperature of the battery cell is detected to be lower than the first low temperature threshold, it indicates that the battery cell temperature is too low and the battery cell needs to be heated to ensure that the charging efficiency and the safety of the energy storage system during charging can be guaranteed after the preset opening interval.
[0092] Step S405: If the charging / discharging start-up time is less than the preset start-up interval and the charging / discharging demand is the discharging demand, check whether the lowest temperature of the battery cell is less than the second low temperature threshold.
[0093] Step S406: If the lowest temperature of the battery cell is detected to be lower than the second low temperature threshold, the second temperature regulation strategy is to increase the temperature of the battery cell.
[0094] In this embodiment, if the lowest temperature of the battery cell is detected to be lower than the second low temperature threshold, it indicates that the battery cell temperature is too low and the battery cell needs to be heated to ensure that the charging efficiency and the safety of the energy storage system during charging can be guaranteed when the energy storage system discharges after the preset opening interval.
[0095] In some embodiments, if an operational fault or thermal runaway fault is detected in the operating state, the energy storage system controls the temperature control system to shut off the heating of the battery cell. Alternatively, if the next stage of the charge / discharge process is detected as requiring charging, and the minimum temperature of the battery cell is greater than a third low-temperature threshold, the energy storage system controls the temperature control system to shut off the heating of the battery cell. Alternatively, if the next stage of the charge / discharge process is detected as requiring discharging, and the minimum temperature of the battery cell is greater than a fourth low-temperature threshold, the energy storage system controls the temperature control system to shut off the heating of the battery cell.
[0096] Compared with the prior art, the embodiments of this application can accurately obtain a second temperature regulation strategy when the energy storage system is in the static mode by simultaneously detecting the working status of the energy storage system, the charging and discharging status of the next stage, and the minimum temperature of the battery cell. This allows the energy storage system to turn on or off the heating of the battery cell in a timely manner, ensuring the safety of the energy storage system.
[0097] like Figure 5 The diagram shown is a flowchart of maintaining the cell temperature according to an embodiment of this application.
[0098] The specific steps are as follows:
[0099] Step S501: Detect whether there are operational faults and / or thermal runaway faults in the working status.
[0100] Step S502: If no operational fault or thermal runaway fault is detected in the working state, calculate the temperature difference.
[0101] In some embodiments, the temperature difference is the difference between the lowest temperature of the cell and the highest temperature of the cell.
[0102] Step S503: Detect whether the temperature difference is greater than the first temperature difference threshold.
[0103] In this embodiment, the first temperature difference threshold can be 5°C. In other embodiments, the first temperature difference threshold can be 6°C, 8°C, or 10°C. This application does not limit the specific value of the first temperature difference threshold.
[0104] Step S504: If the detected temperature difference is greater than the first temperature difference threshold, check whether the inlet temperature is within the preset inlet temperature range.
[0105] In this embodiment, the preset inlet temperature range can be [18℃, 35℃]. In other embodiments, the preset inlet temperature range can also be [15℃, 30℃] or [20℃, 40℃]. The preset inlet temperature range can be set according to the actual testing requirements. This application does not limit the preset inlet temperature range.
[0106] Step S505: If the inlet temperature is detected to be within the preset inlet temperature range, the first temperature regulation strategy or the second temperature regulation strategy is to maintain the cell temperature.
[0107] In some embodiments, if the first temperature regulation strategy or the second temperature regulation strategy is to maintain the cell temperature, it indicates that there is no need to heat or cool the cell at this time, and the energy storage system activates the thermal equilibrium mode. The thermal equilibrium mode indicates that the energy storage system controls the cell to maintain its current temperature.
[0108] In some embodiments, if an operational fault is detected, the temperature difference is less than the second temperature difference threshold, the battery inlet temperature is less than the first inlet temperature threshold, or the battery inlet temperature is greater than the second inlet temperature threshold, the energy storage system shuts down the thermal equilibrium mode.
[0109] In this embodiment, the second temperature difference threshold is 3°C, which is less than the first temperature difference threshold. The first inlet temperature threshold is 15°C, and the second inlet temperature threshold is 38°C, which is less than the first inlet temperature threshold. In other embodiments, the second temperature difference threshold may also be 1°C or 2°C, the first inlet temperature threshold may also be 10°C or 12°C, and the second inlet temperature threshold may be 35°C or 40°C. This application does not limit the specific values of the second temperature difference threshold, the first inlet temperature threshold, and the second inlet temperature threshold.
[0110] Compared with the prior art, the embodiments of this application simultaneously detect the operating mode of the energy storage system, the working status of the energy storage system, the inlet temperature and the temperature difference, which can avoid the problem of damage to the energy storage system caused by inaccurate detection, such as heating or cooling of the battery cells.
[0111] Please refer to Figure 6 This is a schematic diagram of the hardware structure of the electronic device 1000 provided in an embodiment of this application. Figure 6 As shown, the electronic device 1000 may include a processor 1001 and a memory 1002. The memory 1002 is used to store one or more computer programs 1003. The one or more computer programs 1003 are configured to be executed by the processor 1001. The one or more computer programs 1003 include instructions that can be used to implement the methods described above in the electronic device 1000.
[0112] It is understood that the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device 1000. In other embodiments, the electronic device 1000 may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements.
[0113] Processor 1001 may include one or more processing units, such as application processors (APs), modems, graphics processing units (GPUs), image signal processors (ISPs), controllers, video codecs, digital signal processors (DSPs), baseband processors, and / or neural network processing units (NPUs). These different processing units may be independent devices or integrated into one or more processors.
[0114] The processor 1001 may also include a memory for storing instructions and data. In some embodiments, the memory in the processor 1001 is a cache memory. This memory can store instructions or data that the processor 1001 has just used or that are used repeatedly. If the processor 1001 needs to use the instruction or data again, it can retrieve it directly from this memory. This avoids repeated accesses, reduces the waiting time of the processor 1001, and thus improves the efficiency of the system.
[0115] In some embodiments, the processor 1001 may include one or more interfaces. Interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a SIM interface, and / or a USB interface, etc.
[0116] In some embodiments, memory 1002 may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.
[0117] This embodiment also provides a computer-readable storage medium storing computer instructions. When the instructions are executed on an electronic device, the electronic device performs the aforementioned method steps to implement the methods described in the above embodiments.
[0118] In this embodiment, the electronic device and computer storage medium are used to execute the corresponding methods provided above. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects of the corresponding methods provided above, and will not be repeated here.
[0119] In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.
[0120] In the several embodiments provided in this application, the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are illustrative. For instance, the division of modules or units is a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.
[0121] The unit described as a separate component may or may not be physically separate. The component shown as a unit can be one physical unit or multiple physical units, that is, it can be located in one place or distributed in multiple different places. Some or all of the units can be selected to achieve the purpose of the solution in this embodiment according to actual needs.
[0122] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.
[0123] If the integrated unit is implemented as a software functional unit and sold or used as an independent printed object, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of this application, essentially, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software printed object. This software printed object is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0124] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application.
Claims
1. A thermal regulation method for an energy storage system, used to regulate the temperature of battery cells within the energy storage system, characterized in that, The method includes: Collect the cell temperature of the battery cell; Obtain the current operating mode of the energy storage system, wherein the operating mode includes a charging / discharging mode and a static mode; Detect whether the operating mode is the charging / discharging mode or the stationary mode; If the operating mode is detected to be the charging and discharging mode, detect whether the current working state of the energy storage system is in an abnormal working state; Based on the detection results of the working state and the cell temperature, a first temperature regulation strategy for the cell is determined; If the operating mode is detected to be the static mode, check whether the current working state of the energy storage system is in the abnormal working state. Based on the detection results of the working status, it is determined whether the battery cell has a charging and discharging requirement; If the battery cell is detected to have the charging and discharging requirement, a second temperature regulation strategy for the battery cell is determined based on the charging and discharging requirement and the battery cell temperature.
2. The thermal regulation method for an energy storage system as described in claim 1, characterized in that, The charging and discharging mode includes a charging mode, the abnormal operating state includes operational failure and thermal runaway failure, and the first temperature regulation strategy includes increasing the cell temperature. The process of collecting the cell temperature includes: The temperature of the battery cell is collected at preset intervals; If the operating mode is detected to be the charging / discharging mode, the step of detecting whether the current operating state of the energy storage system is in an abnormal operating state includes: If the operating mode is detected to be the charging mode, detect whether the current operating state of the energy storage system is under the operating fault and / or the thermal runaway fault; The step of determining a first temperature regulation strategy for the battery cell based on the detection results of the operating state and the cell temperature includes: If it is detected that there is no operational fault or thermal runaway fault in the operating state, check whether the lowest temperature among all the cell temperatures collected within the preset period is less than a first low temperature threshold. If the lowest temperature is detected to be lower than the first low temperature threshold, the first temperature adjustment strategy is to increase the cell temperature.
3. The thermal regulation method for an energy storage system as described in claim 1, characterized in that, The charging and discharging mode includes a discharging mode, the abnormal operating state includes operational failure and thermal runaway failure, and the first temperature regulation strategy includes increasing the cell temperature. The process of collecting the cell temperature includes: The temperature of the battery cell is collected at preset intervals; If the operating mode is detected to be the charging / discharging mode, the step of detecting whether the current operating state of the energy storage system is in an abnormal operating state includes: If the operating mode is detected to be the discharge mode, detect whether the current operating state of the energy storage system is under the operating fault and / or the thermal runaway fault; If it is detected that there is no operational fault or thermal runaway fault in the operating state, check whether the lowest temperature among all the cell temperatures collected within the preset period is less than the second low temperature threshold. The step of determining a first temperature regulation strategy for the battery cell based on the detection results of the operating state and the cell temperature includes: If the lowest temperature is detected to be lower than the second low temperature threshold, the first temperature adjustment strategy is to increase the cell temperature.
4. The thermal regulation method for an energy storage system as described in claim 1, characterized in that, The abnormal operating states include operational failures and thermal runaway failures, and the first temperature regulation strategy includes reducing the cell temperature. The process of collecting the cell temperature includes: The temperature of the battery cell is collected at preset intervals; If the operating mode is detected to be the charging / discharging mode, the step of detecting whether the current operating state of the energy storage system is in an abnormal operating state includes: If the operating mode is detected to be the charging and discharging mode, detect whether the current operating state of the energy storage system is under the operating fault and / or the thermal runaway fault; The step of determining a first temperature regulation strategy for the battery cell based on the detection results of the operating state and the cell temperature includes: If thermal runaway fault is detected in the operating state, check whether the highest temperature among all the cell temperatures collected within the preset period is greater than a first high temperature threshold. If the highest temperature detected is greater than the first high temperature threshold, the first temperature adjustment strategy is to reduce the cell temperature.
5. The thermal regulation method for an energy storage system as described in claim 1, characterized in that, The energy storage system includes a battery system, and the battery system includes the battery cell; the first temperature regulation strategy includes maintaining the temperature of the battery cell, and the abnormal operating state includes operational failure and thermal runaway failure. The process of collecting the cell temperature includes: The temperature of the battery cell is collected at preset intervals; Collect the water inlet temperature at the water inlet of the battery system; If the operating mode is detected to be the charging / discharging mode, the step of detecting whether the current operating state of the energy storage system is in an abnormal operating state includes: If the operating mode is detected to be the charging and discharging mode, detect whether the current operating state of the energy storage system is under the operating fault and / or the thermal runaway fault; The step of determining a first temperature regulation strategy for the battery cell based on the detection results of the operating state and the cell temperature includes: If the operating state is found to be free of the operational fault and the thermal runaway fault, calculate the temperature difference. Wherein, the temperature difference is the difference between the lowest and highest temperatures among all the cell temperatures collected within the preset period; Detect whether the temperature difference value is greater than the first temperature difference threshold; If the temperature difference is detected to be greater than the first temperature difference threshold, it is detected whether the inlet temperature is within the preset inlet temperature range. If the inlet temperature is detected to be within the preset inlet temperature range, the first temperature regulation strategy is to maintain the cell temperature.
6. The thermal regulation method for an energy storage system as described in claim 1, characterized in that, The abnormal operating states include operational failures and thermal runaway failures; the second temperature regulation strategy includes increasing the cell temperature; and the charging and discharging requirements include charging requirements and discharging requirements. The process of collecting the cell temperature includes: The temperature of the battery cell is collected at preset intervals; If the operating mode is detected to be the idle mode, the step of detecting whether the current operating state of the energy storage system is in the abnormal operating state includes: If the operating mode is detected to be the static mode, check whether the current operating state of the energy storage system is under the operating fault and / or the thermal runaway fault; The step of detecting whether the battery cell has a charging / discharging requirement based on the detection result of the working state includes: If it is detected that the current operating state of the energy storage system does not have the operational fault or the thermal runaway fault, then it is detected whether the battery cell has the charging and discharging requirement; The step of determining the second temperature regulation strategy for the battery cell based on the charging and discharging requirements and the cell temperature includes: The charging and discharging start-up duration is obtained, which is the time interval between the current time point and the time point when the charging and discharging demand of the battery cell is activated. Detect whether the charging / discharging start-up duration is less than a preset start-up interval and whether the charging / discharging demand is the charging demand or the discharging demand; If it is detected that the charging / discharging start-up time is less than the preset start-up interval, and the charging / discharging demand is the charging demand, then it is detected whether the lowest temperature among all the cell temperatures collected within the preset period is less than a first low temperature threshold. If the lowest temperature among all the cell temperatures collected within the preset period is detected to be less than the first low temperature threshold, the second temperature adjustment strategy is to increase the cell temperature. If it is detected that the charging / discharging start-up time is less than the preset start-up interval, and the charging / discharging demand is the discharging demand, then it is detected whether the minimum temperature is less than the second low temperature threshold. If the lowest temperature is detected to be lower than the second low temperature threshold, the second temperature regulation strategy is to increase the cell temperature.
7. The thermal regulation method for an energy storage system as described in claim 6, characterized in that, The second temperature regulation strategy further includes reducing the cell temperature; the step of detecting whether the cell has charging and discharging requirements based on the detection results of the operating state further includes: If a thermal runaway fault is detected in the operating state, it is detected whether the highest temperature among all the cell temperatures collected within the preset period is greater than a first high temperature threshold. If the highest temperature is detected to be greater than the first high temperature threshold, the second temperature adjustment strategy is to reduce the cell temperature.
8. The thermal regulation method for an energy storage system as described in claim 1, characterized in that, The energy storage system includes a battery system, and the battery system includes the battery cell; the second temperature regulation strategy includes maintaining the temperature of the battery cell, and the abnormal operating state includes operational failure and thermal runaway failure. The process of collecting the cell temperature includes: The temperature of the battery cell is collected at preset intervals; Collect the water inlet temperature at the water inlet of the battery system; If the operating mode is detected to be the idle mode, the step of detecting whether the current operating state of the energy storage system is in an abnormal operating state includes: If the operating mode is detected to be the static mode, check whether the current operating state of the energy storage system is under the operating fault and / or the thermal runaway fault; If the cell is detected to have the charging / discharging requirement, a second temperature regulation strategy for the cell is determined based on the charging / discharging requirement and the cell temperature, including: If it is detected that the current operating state of the energy storage system does not contain the operational fault or the thermal runaway fault, calculate the temperature difference value; Wherein, the temperature difference is the difference between the lowest and highest temperatures among all the cell temperatures collected within the preset period; Detect whether the temperature difference value is greater than the first temperature difference threshold; If the temperature difference is detected to be greater than the first temperature difference threshold, it is detected whether the inlet temperature is within the preset inlet temperature range. If the inlet temperature is detected to be within the preset inlet temperature range, the second temperature regulation strategy is to maintain the cell temperature.
9. An electronic device, characterized in that, The electronic device includes a processor and a memory, the memory being used to store instructions, and the processor being used to invoke the instructions in the memory, causing the electronic device to execute the thermal regulation method of the energy storage system according to any one of claims 1 to 8.
10. A computer storage medium, characterized in that, The computer storage medium stores computer instructions that, when executed on an electronic device, cause the electronic device to perform the thermal regulation method for an energy storage system as described in any one of claims 1 to 8.