Energy storage system safety monitoring method, device, equipment and storage medium

Abstract

The application discloses a kind of energy storage system safety monitoring method, device, equipment and computer readable storage medium, the method comprises: obtaining the temperature information measured by each temperature measuring point respectively, and obtaining the monitoring parameter information obtained by monitoring each to-be-monitored battery, wherein the overall space region where each to-be-monitored battery is located is divided into hierarchical structure including at least one level, multiple space regions divided in each layer in hierarchical structure are divided into multiple sub-space regions in next layer respectively, and one temperature measuring point is respectively arranged in each space region divided in each layer;According to the monitoring parameter analysis result corresponding to to-be-monitored battery and the region temperature analysis result corresponding to the space region of at least one level where to-be-monitored battery is located, the safety monitoring result of to-be-monitored battery is determined.The application reduces the false detection when the safety monitoring of battery in energy storage system is carried out, and improves the accuracy of the safety monitoring of energy storage system.

Description

Technical Field

[0001] This invention relates to the field of energy storage system technology, and in particular to a method, apparatus, equipment and computer-readable storage medium for energy storage system safety monitoring. Background Technology

[0002] With the rapid advancement of energy storage systems, their safety has become a core concern. During operation, battery cells may experience fires due to internal short circuits or other issues. Therefore, it is crucial to monitor the safety status of the cells during system operation to detect problems early and implement preventative measures. Currently, safety monitoring of energy storage systems involves individually sampling the temperature of each cell and issuing an alarm when a single cell's temperature exceeds a certain level. This method fails to consider the interrelationships between individual cells, potentially leading to misjudgments. Summary of the Invention

[0003] The main objective of this invention is to provide a method, apparatus, device, and computer-readable storage medium for safety monitoring of energy storage systems. The aim is to propose a safety monitoring scheme for energy storage systems that considers the interrelationships between individual cells in the energy storage system, thereby improving the accuracy of safety monitoring.

[0004] To achieve the above objectives, the present invention provides a method for safety monitoring of an energy storage system, the method comprising the following steps:

[0005] The system acquires temperature information measured at various temperature measurement points during the operation of the energy storage system, and acquires monitoring parameter information obtained by monitoring each battery cell under test during the operation of the energy storage system. The overall space area where each battery cell under test is located is divided into a hierarchical structure including at least one level. The multiple space areas divided in each level of the hierarchical structure are further divided into multiple sub-space areas in the next level. A temperature measurement point is set in each space area divided in each level.

[0006] Based on the analysis results of the monitoring parameters corresponding to the battery cell to be monitored and the analysis results of the regional temperature corresponding to at least one level of the spatial region where the battery cell to be monitored is located, the safety monitoring result of the battery cell to be monitored is determined. The analysis results of the monitoring parameters are obtained by analyzing the monitoring parameter information of the battery cell to be monitored, and the analysis results of the regional temperature are obtained by analyzing the temperature information of the temperature measuring points set in the spatial region.

[0007] Optionally, the step of determining the safety monitoring result of the battery cell under monitoring based on the analysis results of the monitoring parameters corresponding to the battery cell under monitoring and the regional temperature analysis results corresponding to at least one level of spatial region where the battery cell under monitoring is located includes:

[0008] The top layer of the hierarchical structure is taken as the target layer, and each spatial region divided in the top layer is taken as the target spatial region. The temperature information corresponding to the temperature measuring points set in each target spatial region is compared to obtain the temperature information comparison result.

[0009] When it is determined that there is an abnormal space region in each of the target space regions based on the temperature information comparison results, if the target level is the lowest level in the hierarchical structure, then each battery cell to be monitored in the abnormal space region is taken as the target battery cell, and the safety monitoring result of the target battery cell is obtained by analyzing the monitoring parameter information of the target battery cell.

[0010] If the target level is not the lowest level in the hierarchical structure, then the target level is updated to the next level below the target level, the target space region is updated to the sub-space regions divided by the abnormal space region in the next level, and the process returns to the step of comparing the temperature information corresponding to the temperature measurement points set in each target space region to obtain the temperature information comparison result.

[0011] Optionally, the temperature information includes at least one temperature parameter value, and the step of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial areas to obtain a temperature information comparison result includes:

[0012] Calculate the center value of the temperature parameter values ​​of the same item corresponding to each target temperature measurement point, and determine the normal parameter range corresponding to each temperature parameter value based on the center value, wherein the target temperature measurement point is a temperature measurement point set within the target space area;

[0013] For any one of the target temperature measurement points to be compared, compare any one of the temperature parameter values ​​corresponding to the target temperature measurement point with the corresponding normal parameter range to obtain the range comparison result corresponding to the target temperature parameter value. The range comparison result includes a result indicating whether the target temperature parameter value exceeds the corresponding normal parameter range, and / or a result indicating the degree to which the target temperature parameter value exceeds the corresponding normal parameter range.

[0014] Based on the comparison results of the ranges corresponding to the various temperature parameter values ​​of the temperature measurement points to be compared, the temperature information comparison results corresponding to the temperature measurement points to be compared are determined.

[0015] Optionally, after the step of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial regions to obtain the temperature information comparison result, the method further includes:

[0016] The spatial regions whose anomaly level, as represented by the temperature information comparison results, is greater than a preset level are defined as abnormal spatial regions.

[0017] Optionally, after the step of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial regions to obtain the temperature information comparison result, the method further includes:

[0018] When it is determined, based on the temperature information comparison results, that there are normal spatial regions in each of the target spatial regions that do not belong to the abnormal spatial regions, a safety monitoring result is obtained, which indicates that each monitored cell in each of the normal spatial regions is in a normal state.

[0019] Optionally, the temperature information includes the temperature value measured at the corresponding temperature measurement point at the time of the safety analysis, and the rate of temperature change measured at the corresponding temperature measurement point during at least one historical period prior to the time of the safety analysis.

[0020] The step of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial regions to obtain the temperature information comparison result includes:

[0021] The temperature values ​​at the time corresponding to the temperature measurement points set in each of the target space areas are compared to obtain the temperature comparison results at the time.

[0022] If it is determined that there is a temperature anomaly region in each of the target spatial regions based on the temperature comparison results at the time, then the temperature change rate corresponding to the temperature measurement point set in each of the target spatial regions is compared to obtain the change rate comparison result, and the temperature information comparison result is determined based on the temperature comparison results at the time and the change rate comparison result.

[0023] If it is determined from the time-temperature comparison results that there are no time-temperature anomaly areas in each of the target spatial regions, then the temperature information comparison result is determined from the time-temperature comparison results.

[0024] Optionally, the monitoring parameter information includes the cell temperature change rate of the cell under monitoring over multiple historical periods prior to the safety analysis time, and the step of analyzing the monitoring parameter information of the target cell to obtain the safety monitoring result of the target cell includes:

[0025] The temperature change rate of each of the monitored cells within the abnormal space region is compared within the same historical period, and the number of abnormalities in the temperature change rate of the target cell within each historical period is accumulated.

[0026] The safety monitoring results of the target battery cell are determined based on the number of anomalies.

[0027] Optionally, the monitoring parameter information includes the cell temperature change rate and fan speed change rate of the cell under monitoring over multiple historical periods prior to the safety analysis time. The step of analyzing the monitoring parameter information of the target cell to obtain the safety monitoring result of the target cell includes:

[0028] The duration during which the cumulative rate of change of the target battery cell temperature and the rate of change of the fan speed are positively correlated;

[0029] The safety monitoring result of the target battery cell is determined based on the duration of the monitoring.

[0030] Optionally, after determining the safety monitoring result of the battery cell under monitoring based on the analysis results of the monitoring parameters corresponding to the battery cell under monitoring and the regional temperature analysis results corresponding to at least one level of the spatial region where the battery cell under monitoring is located, the method further includes:

[0031] When the safety monitoring result of the battery cell under monitoring indicates that the battery cell under monitoring needs to be abnormally handled, the abnormal handling measures corresponding to the safety monitoring result of the battery cell under monitoring shall be executed, wherein the abnormal handling measures include outputting early warning prompts and / or disconnecting connections.

[0032] To achieve the above objectives, the present invention also provides an energy storage system safety monitoring device, the energy storage system safety monitoring device comprising:

[0033] The acquisition module is used to acquire temperature information measured at various temperature measurement points during the operation of the energy storage system, and to acquire monitoring parameter information obtained by monitoring each cell to be monitored during the operation of the energy storage system. The overall space area where each cell to be monitored is located is divided into a hierarchical structure including at least one level. The multiple space areas divided in each level of the hierarchical structure are further divided into multiple sub-space areas in the next level. A temperature measurement point is set in each space area divided in each level.

[0034] The determination module is used to determine the safety monitoring result of the battery cell to be monitored based on the analysis results of the monitoring parameters corresponding to the battery cell to be monitored and the regional temperature analysis results corresponding to the spatial region at least one level where the battery cell to be monitored is located. The monitoring parameter analysis results are obtained by analyzing the monitoring parameter information of the battery cell to be monitored, and the regional temperature analysis results are obtained by analyzing the temperature information of the temperature measuring points set in the spatial region.

[0035] To achieve the above objectives, the present invention also provides an energy storage system safety monitoring device, the energy storage system safety monitoring device comprising: a memory, a processor, and an energy storage system safety monitoring program stored in the memory and executable on the processor, wherein when the energy storage system safety monitoring program is executed by the processor, it implements the steps of the energy storage system safety monitoring method as described above.

[0036] Furthermore, to achieve the above objectives, the present invention also proposes a computer-readable storage medium storing an energy storage system safety monitoring program, wherein the energy storage system safety monitoring program, when executed by a processor, implements the steps of the energy storage system safety monitoring method as described above.

[0037] In this invention, temperature information measured at various temperature measurement points during the operation of the energy storage system, and monitoring parameter information obtained by monitoring each battery cell under test during the operation of the energy storage system are acquired. The overall spatial area where each battery cell under test is located is divided into a hierarchical structure comprising at least one level. Multiple spatial areas divided in each level of the hierarchical structure are further divided into multiple sub-spatial areas in the next level. A temperature measurement point is set in each spatial area divided in each level. Based on the analysis results of the monitoring parameters corresponding to the battery cell under test and the regional temperature analysis results corresponding to the at least one level of spatial area where the battery cell under test is located, the safety monitoring results of the battery cell under test are determined. The monitoring parameter analysis results are obtained by analyzing the monitoring parameter information of the battery cell under test, and the regional temperature analysis results are obtained by analyzing the temperature information of the temperature measurement points set in the spatial area.

[0038] Compared to comparing individual temperature values ​​and thresholds for each cell, this invention considers the interrelationships between cells. It divides the overall space of each cell into at least one hierarchical structure and sets temperature measurement points in each layer. By combining the analysis results of temperature information measured by the temperature measurement points in the cell's space with the analysis results of the cell's own monitoring parameters, the safety monitoring results of the cell are analyzed. This enriches the analytical dimensions for cell safety monitoring, thereby reducing false detections and improving the accuracy of safety monitoring of energy storage systems. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the hardware operating environment involved in the embodiments of the present invention;

[0040] Figure 2 This is a flowchart illustrating the first embodiment of the energy storage system safety monitoring method of the present invention;

[0041] Figure 3This is a schematic diagram of the structure of an energy storage container according to an embodiment of the present invention;

[0042] Figure 4 , Figure 5 and Figure 6 The schematic diagrams of two safety monitoring system architectures involved in the embodiments of the present invention are shown, and the path inclination statistical count distribution diagram of a relatively regular cable tray scheme involved in the embodiments of the present invention is shown.

[0043] Figure 7 This is a schematic diagram of the functional modules of a preferred embodiment of the energy storage system safety monitoring device of the present invention.

[0044] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0046] like Figure 1 As shown, Figure 1 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of the present invention.

[0047] It should be noted that the energy storage system safety monitoring device in this embodiment of the invention can be a smartphone, personal computer, server, or other device, and no specific limitation is made here.

[0048] like Figure 1 As shown, the energy storage system safety monitoring device may include: a processor 1001, such as a CPU; a network interface 1004; a user interface 1003; a memory 1005; and a communication bus 1002. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed RAM or a stable, non-volatile memory, such as a disk drive. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0049] Those skilled in the art in this field can understand. Figure 1 The equipment structure shown does not constitute a limitation on the safety monitoring equipment for energy storage systems. It may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0050] like Figure 1 As shown, the memory 1005, as a computer storage medium, may include an operating system, a network communication module, a user interface module, and an energy storage system safety monitoring program. The operating system is a program that manages and controls the hardware and software resources of the device, supporting the operation of the energy storage system safety monitoring program and other software or programs. Figure 1 In the device shown, the user interface 1003 is mainly used for data communication with the client; the network interface 1004 is mainly used for establishing a communication connection with the server; and the processor 1001 can be used to call the energy storage system safety monitoring program stored in the memory 1005 and perform the following operations:

[0051] The system acquires temperature information measured at various temperature measurement points during the operation of the energy storage system, and acquires monitoring parameter information obtained by monitoring each battery cell under test during the operation of the energy storage system. The overall space area where each battery cell under test is located is divided into a hierarchical structure including at least one level. The multiple space areas divided in each level of the hierarchical structure are further divided into multiple sub-space areas in the next level. A temperature measurement point is set in each space area divided in each level.

[0052] Based on the analysis results of the monitoring parameters corresponding to the battery cell to be monitored and the analysis results of the regional temperature corresponding to at least one level of the spatial region where the battery cell to be monitored is located, the safety monitoring result of the battery cell to be monitored is determined. The analysis results of the monitoring parameters are obtained by analyzing the monitoring parameter information of the battery cell to be monitored, and the analysis results of the regional temperature are obtained by analyzing the temperature information of the temperature measuring points set in the spatial region.

[0053] Further, the operation of determining the safety monitoring result of the battery cell under monitoring based on the analysis results of the monitoring parameters corresponding to the battery cell under monitoring and the regional temperature analysis results corresponding to at least one level of spatial region where the battery cell under monitoring is located includes:

[0054] The top layer of the hierarchical structure is taken as the target layer, and each spatial region divided in the top layer is taken as the target spatial region. The temperature information corresponding to the temperature measuring points set in each target spatial region is compared to obtain the temperature information comparison result.

[0055] When it is determined that there is an abnormal space region in each of the target space regions based on the temperature information comparison results, if the target level is the lowest level in the hierarchical structure, then each battery cell to be monitored in the abnormal space region is taken as the target battery cell, and the safety monitoring result of the target battery cell is obtained by analyzing the monitoring parameter information of the target battery cell.

[0056] If the target level is not the lowest level in the hierarchical structure, then the target level is updated to the next level below the target level, the target space region is updated to the sub-space regions divided into the abnormal space region in the next level, and the operation of comparing the temperature information corresponding to the temperature measurement points set in each target space region to obtain the temperature information comparison result is returned.

[0057] Furthermore, the temperature information includes at least one temperature parameter value, and the operation of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial regions to obtain the temperature information comparison result includes:

[0058] Calculate the center value of the temperature parameter values ​​of the same item corresponding to each target temperature measurement point, and determine the normal parameter range corresponding to each temperature parameter value based on the center value, wherein the target temperature measurement point is a temperature measurement point set within the target space area;

[0059] For any one of the target temperature measurement points to be compared, compare any one of the temperature parameter values ​​corresponding to the target temperature measurement point with the corresponding normal parameter range to obtain the range comparison result corresponding to the target temperature parameter value. The range comparison result includes a result indicating whether the target temperature parameter value exceeds the corresponding normal parameter range, and / or a result indicating the degree to which the target temperature parameter value exceeds the corresponding normal parameter range.

[0060] Based on the comparison results of the ranges corresponding to the various temperature parameter values ​​of the temperature measurement points to be compared, the temperature information comparison results corresponding to the temperature measurement points to be compared are determined.

[0061] Furthermore, after comparing the temperature information corresponding to the temperature measurement points set in each of the target spatial regions to obtain the temperature information comparison result, the processor 1001 can also be used to call the energy storage system safety monitoring program stored in the memory 1005 to perform the following operations:

[0062] The spatial regions whose anomaly level, as represented by the temperature information comparison results, is greater than a preset level are defined as abnormal spatial regions.

[0063] Furthermore, after comparing the temperature information corresponding to the temperature measurement points set in each of the target spatial regions to obtain the temperature information comparison result, the processor 1001 can also be used to call the energy storage system safety monitoring program stored in the memory 1005 to perform the following operations:

[0064] When it is determined, based on the temperature information comparison results, that there are normal spatial regions in each of the target spatial regions that do not belong to the abnormal spatial regions, a safety monitoring result is obtained, which indicates that each monitored cell in each of the normal spatial regions is in a normal state.

[0065] Furthermore, the temperature information includes the temperature value measured at the corresponding temperature measurement point at the time of the safety analysis, and the rate of temperature change measured at the corresponding temperature measurement point during at least one historical period prior to the time of the safety analysis.

[0066] The operation of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial regions to obtain the temperature information comparison result includes:

[0067] The temperature values ​​at the time corresponding to the temperature measurement points set in each of the target space areas are compared to obtain the temperature comparison results at the time.

[0068] If it is determined that there is a temperature anomaly region in each of the target spatial regions based on the temperature comparison results at the time, then the temperature change rate corresponding to the temperature measurement point set in each of the target spatial regions is compared to obtain the change rate comparison result, and the temperature information comparison result is determined based on the temperature comparison results at the time and the change rate comparison result.

[0069] If it is determined from the time-temperature comparison results that there are no time-temperature anomaly areas in each of the target spatial regions, then the temperature information comparison result is determined from the time-temperature comparison results.

[0070] Furthermore, the monitoring parameter information includes the cell temperature change rate of the cell under monitoring over multiple historical periods prior to the safety analysis time. The operation of analyzing the monitoring parameter information of the target cell to obtain the safety monitoring result of the target cell includes:

[0071] The temperature change rate of each of the monitored cells within the abnormal space region is compared within the same historical period, and the number of abnormalities in the temperature change rate of the target cell within each historical period is accumulated.

[0072] The safety monitoring results of the target battery cell are determined based on the number of anomalies.

[0073] Furthermore, the monitoring parameter information includes the cell temperature change rate and fan speed change rate of the cell under monitoring over multiple historical periods prior to the safety analysis time. The operation of analyzing the monitoring parameter information of the target cell to obtain the safety monitoring result of the target cell includes:

[0074] The duration during which the cumulative rate of change of the target battery cell temperature and the rate of change of the fan speed are positively correlated;

[0075] The safety monitoring result of the target battery cell is determined based on the duration of the monitoring.

[0076] Furthermore, after determining the safety monitoring result of the battery cell under monitoring based on the analysis results of the monitoring parameters corresponding to the battery cell under monitoring and the regional temperature analysis results corresponding to at least one level of the spatial region where the battery cell under monitoring is located, the processor 1001 can also be used to call the energy storage system safety monitoring program stored in the memory 1005 to perform the following operations:

[0077] When the safety monitoring result of the battery cell under monitoring indicates that the battery cell under monitoring needs to be abnormally handled, the abnormal handling measures corresponding to the safety monitoring result of the battery cell under monitoring shall be executed, wherein the abnormal handling measures include outputting early warning prompts and / or disconnecting connections.

[0078] Based on the above structure, various embodiments of the energy storage system safety monitoring method are proposed.

[0079] Reference Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the energy storage system safety monitoring method of the present invention.

[0080] This invention provides an embodiment of a safety monitoring method for energy storage systems. It should be noted that although the flowchart shows a logical order, in some cases, the steps shown or described may be executed in a different order. In this embodiment, the executing entity of the energy storage system safety monitoring method can be a personal computer, smartphone, or other device; this is not limited in this embodiment. For ease of description, the execution entity is omitted from the following description of each embodiment. In this embodiment, the energy storage system safety monitoring method includes:

[0081] Step S10: Obtain temperature information measured at each temperature measurement point during the operation of the energy storage system, and obtain monitoring parameter information obtained by monitoring each cell to be monitored during the operation of the energy storage system. The overall space area where each cell to be monitored is located is divided into a hierarchical structure including at least one level. The multiple space areas divided in each level of the hierarchical structure are divided into multiple sub-space areas in the next level. A temperature measurement point is set in each space area divided in each level.

[0082] The temperatures of individual cells in an energy storage system may be correlated. For example, the temperatures of cells that are close together may affect each other. Therefore, when judging the safety status of a cell based solely on comparing the individual temperature of each cell with a certain threshold, misjudgments are likely to occur.

[0083] In this embodiment, to address the aforementioned issues, it is proposed that when conducting safety monitoring of an energy storage system, the safety monitoring results of the battery cell be determined by combining the monitoring parameter information of the battery cell itself and the ambient temperature of the environment in which the battery cell is located, thereby improving the accuracy of safety monitoring of the energy storage system.

[0084] The battery cells in the energy storage system that need to be monitored are designated as the cells to be monitored. For each cell to be monitored, a monitoring device can be set up to monitor at least one parameter of the cell (hereinafter referred to as the monitoring parameter for distinction). The monitoring parameter can include directly measured parameters, such as cell temperature, cell voltage, and cell current, or parameters calculated from directly measured parameters, such as cell power, the rate of change of cell voltage over a time period, and the rate of change of cell temperature over a time period. This embodiment does not impose any limitations. In a specific implementation, by monitoring electrical parameters and combining the monitored electrical parameter information with the monitored cell temperature information, the safety status of the cell is determined. This method is more accurate than determining the safety status of the cell solely based on cell temperature information. Different monitoring devices can be used to monitor different parameters. The specific implementation method of the monitoring device and its setting method in the energy storage system are not limited in this embodiment.

[0085] During the operation of the energy storage system, monitoring parameter information is acquired by monitoring each battery cell individually. This monitoring parameter information refers to the specific values ​​of the monitoring parameters for each battery cell. In other words, the monitoring parameter information can include at least one monitoring parameter value. For example, when temperature is included as a monitoring parameter, the monitoring parameter information can include the temperature value of the battery cell at a specific moment.

[0086] The overall space area containing each monitored cell is divided into a hierarchical structure comprising at least one level. Each level's multiple spatial regions are further divided into sub-regions in the next level. A temperature measurement point is set within each of these sub-regions. The number of levels and the number of sub-regions within each level can be determined based on the specific structure of the energy storage system and are not limited in this embodiment. For example, as shown in... Figure 3Taking the containerized energy storage system shown as an example, this system includes multiple battery clusters (two clusters are schematically shown in the figure), each battery cluster includes multiple racks, each rack includes multiple packs, and each pack includes multiple cells. The overall space area where the container is located can be divided into N sub-space areas, that is, the first level includes N space areas (called the first-level space area). For each first-level space area, the area occupied by each pack in the first-level space area is considered as a sub-space area. Then, the number of packs in the first-level space area indicates how many second-level space areas the first-level space area is divided into. The second-level space areas are not further divided. That is, the hierarchical structure includes a total of two levels. A temperature measuring point is set in each first-level space area, and a temperature measuring point is set in each second-level space area. In this embodiment, there is no specific restriction on the location of the temperature measuring point in the space area. For example, it can be set in the central area of ​​the space area.

[0087] During the operation of the energy storage system, temperature information measured at various temperature measurement points is also acquired. This temperature information may include at least one temperature parameter value, which can be the temperature value measured at a certain moment or the rate of temperature change measured over a period of time. In other words, the temperature value at a certain moment and the rate of temperature change over a period of time are different temperature parameter values.

[0088] In a specific implementation, a safety analysis can be performed at regular intervals (hereinafter, the moment when the safety analysis begins is referred to as the safety analysis moment). That is, monitoring parameter information and temperature information of the temperature measurement point are acquired at regular intervals, and a safety analysis is performed based on the acquired monitoring parameter information and temperature information. The time interval between two adjacent safety analyses can be set according to the real-time requirements of safety monitoring in the specific application scenario. When the real-time requirements are high, the time interval can be set to be shorter, such as analyzing once every 10 minutes.

[0089] It should be noted that the time interval for conducting safety analyses can differ from the time interval for monitoring the various parameters of the battery cell under monitoring and the time interval for collecting the temperature data at the temperature measurement points. For example, if the monitoring parameter values ​​of the battery cell under monitoring and the temperature values ​​of the temperature measurement points are collected every minute, and a safety analysis is performed every 10 minutes, then the monitoring parameter information obtained during the safety analysis can include the monitoring parameter values ​​monitored at the time of the safety analysis, or it can also include the monitoring parameter values ​​monitored before the time of the safety analysis. The same applies to temperature information.

[0090] Step S20: Determine the safety monitoring result of the battery cell to be monitored based on the monitoring parameter analysis results corresponding to the battery cell to be monitored and the regional temperature analysis results corresponding to the spatial region at least one level where the battery cell to be monitored is located. The monitoring parameter analysis results are obtained by analyzing the monitoring parameter information of the battery cell to be monitored, and the regional temperature analysis results are obtained by analyzing the temperature information of the temperature measuring points set in the spatial region.

[0091] The analysis can be performed on the monitoring parameters of the battery cell to be monitored (the results obtained are hereinafter referred to as monitoring parameter analysis results for distinction), and on the temperature information of the temperature measurement point (the results obtained are hereinafter referred to as area temperature analysis results for distinction). In specific implementations, there are many ways to analyze the monitoring parameter information and temperature information, and this embodiment does not impose any restrictions. For example, the values ​​of each parameter can be compared with the corresponding thresholds, and the comparison results can be used as the analysis results.

[0092] The safety monitoring result of the battery cell under monitoring can be determined based on the analysis results of the monitoring parameters corresponding to the battery cell under monitoring and the regional temperature analysis results of the spatial region corresponding to at least one level where the battery cell under monitoring is located. In specific embodiments, there are many ways to determine the safety monitoring result of the battery cell under monitoring based on the analysis results of monitoring parameters and the regional temperature analysis results, and this embodiment does not impose any limitations. For example, the anomaly level of the battery cell under monitoring represented by the analysis results of monitoring parameters and the anomaly level of the battery cell under monitoring represented by the regional temperature analysis results can be superimposed to obtain the comprehensive anomaly level of the battery cell under monitoring, and this comprehensive anomaly level can be used as the safety monitoring result.

[0093] It's understandable that the temperature of a monitored battery cell will be transferred to other nearby monitored cells. Therefore, a high temperature in one cell doesn't necessarily indicate that the cell itself is abnormal; it could be due to the influence of abnormal cells nearby. When the cell's own monitoring parameters are abnormal, it suggests a higher probability of an abnormal situation. Furthermore, when the temperature of the cell's surrounding environment is also abnormal, it further confirms that the cell is experiencing an abnormality or a more serious one. Therefore, combining the analysis results of the cell's own monitoring parameters with the analysis results of the ambient temperature can improve the accuracy of safety monitoring results obtained from battery cell safety analysis.

[0094] The safety monitoring results can specifically indicate whether the monitored battery cell is an abnormal cell, or they can indicate the degree of abnormality of the monitored battery cell. In specific implementations, the settings can be configured according to the needs of specific application scenarios, and this implementation does not impose any limitations.

[0095] Furthermore, in a specific implementation, after obtaining the safety monitoring results of the cells to be monitored, the safety monitoring results of each cell can be output, for example, in the form of a report. Alternatively, corresponding anomaly handling measures can be implemented for abnormal cells, or corresponding levels of anomaly handling measures can be implemented for cells with different anomaly levels. No specific limitations are imposed in this embodiment.

[0096] Compared to comparing individual temperature values ​​and thresholds for each cell, this embodiment considers the interrelationships between cells. It divides the overall space area where each cell is located into at least one hierarchical structure, and sets temperature measurement points in each layer. The analysis results of the cell safety monitoring results are combined with the analysis results of the temperature information measured by the temperature measurement points in the cell's space area and the monitoring parameters of the cell itself. This enriches the analytical dimensions for cell safety monitoring, thereby reducing false detections and improving the accuracy of energy storage system safety monitoring.

[0097] Furthermore, in one embodiment, the analysis of temperature information at temperature measurement points can specifically involve comparing the temperature information of each temperature measurement point set up in various spatial areas of the same level. The comparison result will be referred to as the temperature information comparison result for distinction, and can be used as the temperature analysis result for the area corresponding to the temperature measurement point. It is understood that if a certain temperature parameter of each temperature measurement point set up in various spatial areas of the same level is consistent when the battery cell is in a normal state, then if the temperature parameter of a certain temperature measurement point differs significantly from other temperature measurement points, it can be considered that the battery cell in the spatial area corresponding to that temperature measurement point may be abnormal or in an abnormal state. Conversely, if the temperature parameter of a certain temperature measurement point is consistent at different times (or time periods) when the battery cell is in a normal state, then if the temperature parameter at a certain time differs significantly from other times, it can be considered that the battery cell in the spatial area corresponding to that temperature measurement point may be abnormal. The purpose of comparing the temperature parameter information of each temperature measurement point is to determine the differences between the temperature parameter information of each temperature measurement point, and thus determine whether there are abnormal temperature measurement points based on the magnitude of the differences. It should be noted that comparing the temperature parameter information of various temperature measuring points can specifically include comparing the same temperature parameter values ​​of the same temperature measuring point at different times or time periods (hereinafter referred to as longitudinal comparison), or comparing the same temperature parameter values ​​of different temperature measuring points at the same time or time period (hereinafter referred to as lateral comparison). In specific embodiments, there are many comparison methods that can achieve the above comparison purpose, and this embodiment does not impose any limitations. For example, in one embodiment, for any one of the temperature measuring points to be compared, for a specific temperature parameter value, it is determined whether at least one of the other temperature measuring points to be compared has a difference in the same temperature parameter value greater than a certain threshold. If so, it can be determined that the temperature information comparison result of that temperature measuring point is in an abnormal state. The form of the temperature information comparison result can also be set as needed, and this embodiment does not impose any limitations. For example, it can be set to compare temperature information to determine whether each temperature measuring point is an abnormal temperature measuring point. Compared to the method of comparing the temperature parameter value of a single temperature measuring point with a threshold to obtain the regional temperature analysis result, by comparing the temperature information of temperature measuring points set in various spatial areas at the same level, it is possible to determine the safety status of the battery cells within the temperature measuring point based on the differences in the temperature parameter status reflected by the temperature information. This can reduce false detections and improve the accuracy of safety monitoring of energy storage systems.

[0098] Furthermore, in one embodiment, analyzing the monitoring parameter information of the cell to be monitored can specifically involve using cells within the spatial region of the lowest layer in the hierarchical structure as the cells to be compared. The monitoring parameter information of each cell to be compared can be compared, and the result obtained is hereinafter referred to as the monitoring parameter comparison result for distinction. The monitoring parameter comparison result can be used as the monitoring parameter analysis result for each cell to be compared. The specific comparison method and purpose can refer to the temperature information comparison method of the temperature measurement points described above, and will not be elaborated here.

[0099] Furthermore, in one embodiment, after step S20, the method further includes:

[0100] Step S30: When the safety monitoring result of the cell to be monitored indicates that the cell to be monitored needs to be abnormally handled, the abnormal handling measures corresponding to the safety monitoring result of the cell to be monitored are executed, wherein the abnormal handling measures include outputting early warning prompts and / or disconnecting connections.

[0101] The safety monitoring results of the monitored battery cell may indicate that the monitored battery cell is normal or abnormal. For each safety monitoring result indicating an abnormality, corresponding abnormality handling measures can be set. For example, abnormality handling measures may include outputting early warning information and / or disconnecting the connection. Different safety monitoring results can correspond to different abnormality handling measures. For example, when the safety monitoring result indicates that the abnormality of the battery cell is minor, the abnormality handling measure may be to output an early warning to enable the staff to investigate the abnormal battery cell. Or, when the safety monitoring result indicates that the abnormality of the battery cell is severe, the abnormality handling measure may be to disconnect the connection to prevent the battery cell from continuing to work and causing a fire.

[0102] Furthermore, in a specific implementation, each cell to be monitored can be assigned a number, which can reflect its spatial location. The number of the cell to be monitored is associated with its corresponding monitoring parameter information and stored, thereby facilitating the differentiation and processing of the monitoring parameter information of each cell to be monitored.

[0103] Furthermore, based on the first embodiment described above, a second embodiment of the energy storage system safety testing method of the present invention is proposed. In this embodiment, step S20 includes:

[0104] Step S201: Take the top layer of the hierarchical structure as the target layer, take each spatial region divided in the top layer as the target spatial region, and compare the temperature information corresponding to the temperature measuring points set in each target spatial region to obtain the temperature information comparison result.

[0105] In this embodiment, temperature information can be analyzed by comparing the temperature information of the temperature measurement points, and the efficiency of safety monitoring can be improved by performing a cyclical analysis according to a hierarchical structure.

[0106] Specifically, the top layer of the hierarchical structure can be taken as the target layer, and the various spatial regions divided within the top layer can be taken as target spatial regions. For the temperature measurement points set within each target spatial region, the temperature information corresponding to each measurement point is compared to obtain the temperature information comparison result. The comparison method can refer to the relevant detailed implementation method in the first embodiment above, and will not be repeated here.

[0107] Step S202: When it is determined that there is an abnormal space region in each of the target space regions based on the temperature information comparison results, if the target level is the lowest level in the hierarchical structure, then each battery cell to be monitored in the abnormal space region is taken as the target battery cell, and the safety monitoring result of the target battery cell is obtained by analyzing the monitoring parameter information of the target battery cell.

[0108] After obtaining the temperature information comparison results from the temperature measurement points set in each target spatial region, it is possible to determine whether there are any abnormal spatial regions within each target spatial region. The method for determining abnormal spatial regions varies depending on the specific form of the temperature information comparison results, and can be set as needed; no restrictions are placed here. For example, when the temperature information comparison results indicate whether a temperature measurement point is in an abnormal state, the target spatial region corresponding to the temperature measurement point in an abnormal state can be considered an abnormal spatial region. Similarly, when the temperature information comparison results indicate the anomaly level of a temperature measurement point, areas with an anomaly level exceeding a certain level can be considered abnormal spatial regions.

[0109] If the target space region is an abnormal space region, it indicates that the battery cells within that region may be abnormal. Further analysis of the sub-space regions or individual battery cells within this target space region can then be performed to determine whether the battery cells within the target space region are truly abnormal or to further ascertain the degree of their abnormality. When the target space region is not an abnormal space region, it indicates that the temperature of the battery cells within that region is not abnormal. In this case, it can be determined that the battery cells within the target space region are in a normal state, or at least that the absence of abnormal warnings or other protective measures for the battery cells within the target space region will not cause serious consequences. Therefore, in this situation, further analysis of the sub-space regions and battery cells within the target space region is unnecessary, avoiding wasted computational resources.

[0110] When it is determined that there are abnormal spatial regions in each target spatial region, if the target level is the lowest level in the hierarchical structure, it means that there are no more sub-space regions below each target spatial region. At this time, the monitoring parameter information of each cell to be monitored in the abnormal spatial region can be analyzed, and the safety detection results of each cell to be monitored can be obtained based on the analysis results (monitoring parameter analysis results).

[0111] In a specific implementation, the detection parameter information of each cell to be monitored in the abnormal space area can be compared to obtain the monitoring parameter comparison result. Based on the monitoring parameter comparison result, the safety monitoring result of each cell to be monitored can be determined, so as to reduce false detections and improve the accuracy of safety monitoring of the energy storage system.

[0112] Step S203: If the target level is not the lowest level in the hierarchical structure, then update the target level to the next level below the target level, update the target space region to the sub-space regions divided by the abnormal space region in the next level, and return to the step of comparing the temperature information corresponding to each temperature measuring point set in each target space region in step S201.

[0113] If the target level is not the lowest level in the hierarchical structure, it means that there are sub-space regions below the target space region. In this case, the target level is updated to the next level below the target level, and the target space region is updated to the sub-space regions divided into the next level of the abnormal space region, so as to analyze the temperature information of the temperature measurement points in each sub-space region.

[0114] Furthermore, in one embodiment, after the step S201 of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial regions to obtain the temperature information comparison result, the method further includes:

[0115] Step S204: When it is determined from the temperature information comparison results that there are normal space regions in each of the target space regions that do not belong to the abnormal space regions, a safety monitoring result is obtained that indicates that each monitored cell in each of the normal space regions is in a normal state.

[0116] When a normal spatial region, which is not an abnormal spatial region, is determined to exist within the target spatial region based on temperature information comparison results, it can be determined that each monitored battery cell within the normal spatial region is in a normal state. In this case, it is unnecessary to analyze the temperature information of each temperature measurement point within the normal spatial region and the monitoring parameter information of each monitored battery cell. A safety monitoring result that characterizes each monitored battery cell as being in a normal state can be directly obtained, thereby saving computational resources and improving the efficiency of safety monitoring. Here, the normal spatial region is the spatial region within the target spatial region that is not an abnormal spatial region.

[0117] Further, in one embodiment, the step S201 of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial regions to obtain a temperature information comparison result includes:

[0118] Step S2011: Compare the time temperature values ​​corresponding to the temperature measurement points set in each of the target space areas to obtain the time temperature comparison result;

[0119] The temperature information corresponding to the temperature measurement point can include the temperature value measured at the temperature measurement point at the time of safety analysis (hereinafter referred to as the time-based temperature value for distinction), and can also include the rate of temperature change measured at the temperature measurement point during at least one historical period prior to the time of safety analysis. The time-based temperature value indicates the temperature status of the temperature measurement point at the time of safety analysis, that is, it can reflect whether the temperature measurement point is normal or abnormal at the time of safety analysis. The rate of temperature change indicates the temperature change process of the temperature measurement point before the time of safety analysis, that is, it may reflect the process of the temperature measurement point changing from a normal state to an abnormal state before the time of safety analysis. In this embodiment, combining the time-based temperature value and the rate of temperature change to determine the state of the temperature measurement point can not only detect obvious abnormalities that have occurred at the time of safety analysis based on the time-based temperature value, but also detect abnormalities that have not been obviously manifested at the time of safety analysis early based on the rate of temperature change. This facilitates early implementation of safety protection measures and avoids irreparable situations due to delayed detection of abnormalities.

[0120] First, the temperature values ​​at the corresponding time points set in each target space area can be compared to obtain the temperature information comparison results (hereinafter referred to as the time-temperature comparison results for distinction).

[0121] Step S2012: If it is determined that there is a temperature anomaly region in each of the target spatial regions based on the temperature comparison results at the time, then the temperature change rate corresponding to the temperature measurement point set in each of the target spatial regions is compared to obtain the change rate comparison result, and the temperature information comparison result is determined based on the temperature comparison results at the time and the change rate comparison result.

[0122] Based on the time-temperature comparison results, it can be determined whether there are any time-temperature anomaly regions in each target spatial region. The specific determination method is not limited in this embodiment. For example, when the time-temperature comparison result can characterize an anomaly level, if the time-temperature comparison result of the temperature measurement point indicates that the anomaly level of that temperature measurement point is greater than a preset level, then it can be determined that the target spatial region corresponding to that temperature measurement point is a time-temperature anomaly region. The preset level can be set as needed. When the temperature comparison result of a temperature measurement point indicates that the abnormality level of that temperature measurement point is greater than the preset level, it means that the temperature of that temperature measurement point shows an abnormality among all temperature measurement points at the same level during the safety analysis. In this case, the temperature change rate corresponding to that temperature measurement point can be further analyzed to determine whether the temperature measurement point is truly abnormal or to further determine the degree of its abnormality. When the temperature comparison result of a temperature measurement point indicates that the abnormality level of that temperature measurement point is less than or equal to the preset level, it means that the temperature measurement point does not show an abnormality among all temperature measurement points at the same level during the safety analysis. In this case, it can be determined that the temperature measurement point is in a normal state, or at least that not implementing abnormality warnings or other protective measures in the target space area corresponding to that temperature measurement point will not cause serious consequences. In this case, it is not necessary to combine the analysis results of the temperature change rate of that temperature measurement point to determine the first cell for subsequent grouping and comparative analysis, thus avoiding wasting computational resources.

[0123] The target space region may or may not contain areas of abnormal temperature at any given time. If areas of abnormal temperature exist, the temperature change rates of the temperature measurement points set in each target space region can be compared. The result is called the rate of change comparison result for differentiation. Specifically, in a detailed implementation, the method for comparing the temperature change rates of the temperature measurement points set in each target space region can include a horizontal comparison method and / or a vertical comparison method. The specific implementation methods for the horizontal and vertical comparison methods are described in the first embodiment above and will not be repeated here. When only a vertical comparison is performed, only the temperature change rates of the temperature measurement points set in the areas of abnormal temperature at any given time can be compared vertically. Target space regions that do not belong to areas of abnormal temperature at any given time can be excluded from the vertical comparison to save computational resources.

[0124] The temperature information comparison result corresponding to the target spatial region is jointly determined by comparing the time-temperature comparison result and the rate of change comparison result of the target spatial region. For example, when the time-temperature comparison result and the rate of change comparison result can characterize the anomaly level of the target spatial region, the anomaly levels characterized by the two comparison results can be superimposed to obtain a comprehensive anomaly level, and this comprehensive anomaly level can be used as the temperature information comparison result corresponding to the target spatial region.

[0125] Step S2013: If it is determined from the time temperature comparison results that there are no time temperature anomaly areas in each of the target spatial regions, then the temperature information comparison result is determined from the time temperature comparison results.

[0126] If the time-temperature comparison results indicate that there are no temperature anomalies in any of the target spatial regions, the temperature information comparison result can be directly determined based on the time-temperature comparison results of the target spatial regions. For example, when the time-temperature comparison results can characterize the anomaly level of the target spatial region, the anomaly level can be directly used as the temperature information comparison result corresponding to the target spatial region, or the anomaly level can be multiplied by a certain ratio and used as the temperature information comparison result.

[0127] Furthermore, based on the second embodiment described above, a third embodiment of the energy storage system safety monitoring method of the present invention is proposed. In this embodiment, the step S201 of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial areas to obtain the temperature information comparison result includes:

[0128] Step S2014: Calculate the center value of the temperature parameter values ​​of the same item corresponding to each target temperature measurement point, and determine the normal parameter range corresponding to each temperature parameter value based on the center value, wherein the target temperature measurement point is a temperature measurement point set in the target space area;

[0129] In this embodiment, the temperature information includes at least one temperature parameter value. It should be explained that the temperature value at a certain moment and the rate of temperature change over a period of time are different temperature parameter values. When comparing the rate of temperature change at the same temperature measurement point over different time periods (vertical comparison), the rate of temperature change in each time period belongs to the same temperature parameter value. When comparing the rate of temperature change at different temperature measurement points (horizontal comparison), the rate of temperature change in different time periods belongs to different temperature parameter values. That is, horizontal comparison compares the rate of temperature change at different temperature measurement points within the same time period.

[0130] Temperature measurement points set within the target spatial area are referred to as target temperature measurement points for distinction. The median value of the temperature parameter corresponding to the same item for each target temperature measurement point is calculated. This can include both horizontal and vertical comparisons; that is, the median value of the rate of temperature change of the same temperature measurement point over different historical periods can be calculated, as can the median value of the rate of temperature change of different temperature measurement points over the same historical period can also be calculated.

[0131] The center value of multiple temperature parameter values ​​represents a central level among these values. In specific implementations, there are many ways to calculate the center value of multiple temperature parameter values, and this embodiment does not impose any limitations. For example, the K-means clustering algorithm can be used for clustering, with the number of clusters set to 1, to obtain a cluster center value.

[0132] Based on the center value of a calculated temperature parameter, a range corresponding to that temperature parameter value can be determined. This range represents the normal level of that temperature parameter value at the temperature measurement points set within each target space region. This range will be referred to as the normal parameter range below for distinction. Specifically, determining the normal parameter range based on the center value can be achieved by floating the center value up or down by a certain amount. This floating value can be set empirically.

[0133] In other implementations, parameter comparisons may not be performed for a period of time during the initial startup of the energy storage system. During this period, the range of the maximum and minimum values ​​of a certain temperature parameter from the temperature measurement points set in various spatial areas of the same level may be used as the normal parameter range corresponding to that temperature parameter value for subsequent safety analysis.

[0134] Step S2015: For any one of the target temperature measurement points to be compared, compare any one of the temperature parameter values ​​corresponding to the target temperature measurement point with the corresponding normal parameter range to obtain the range comparison result corresponding to the target temperature parameter value. The range comparison result includes a result indicating whether the target temperature parameter value exceeds the corresponding normal parameter range, and / or a result indicating the degree to which the target temperature parameter value exceeds the corresponding normal parameter range.

[0135] Any one of the target temperature measurement points is designated as the comparison point for distinction. Any temperature parameter value (hereinafter referred to as the target temperature parameter value) corresponding to the comparison point is compared with its corresponding normal temperature range to obtain a comparison result (hereinafter referred to as the range comparison result). For example, comparing the temperature value of the comparison point with the normal temperature range yields a range comparison result; comparing the rate of temperature change of the comparison point over a historical period with the normal rate of temperature change range over that historical period yields another range comparison result.

[0136] In specific implementations, depending on specific needs, the range comparison results can be set to include results indicating whether the target temperature parameter value exceeds the corresponding normal parameter range, or results indicating the degree to which the target temperature parameter value exceeds the corresponding normal parameter range, or results indicating both whether the target temperature parameter value exceeds the corresponding normal parameter range and the degree to which the target temperature parameter value exceeds the corresponding normal parameter range. In this embodiment, no limitation is imposed.

[0137] Step S2016: Based on the range comparison results corresponding to the temperature parameter values ​​of the temperature measurement points to be compared, determine the temperature information comparison results corresponding to the temperature measurement points to be compared.

[0138] After obtaining the range comparison results of the various temperature parameter values ​​of the temperature measurement points to be compared, the temperature information comparison results of the temperature measurement points to be compared can be determined based on the range comparison results. In one embodiment, the temperature information comparison result can be a result indicating whether the temperature measurement point is abnormal. In this case, if the range comparison results determine that at least one temperature parameter value of the temperature measurement point exceeds the corresponding normal parameter range, it can be determined that the temperature measurement point is abnormal; otherwise, it can be determined that the temperature measurement point is not abnormal.

[0139] In another embodiment, the temperature information comparison result can be the anomaly level of the temperature measurement point. That is, the anomaly level of the temperature measurement point can be determined based on the comparison results of the ranges corresponding to the various temperature parameter values ​​of the temperature measurement point. In specific embodiments, the method of determining the anomaly level of the temperature measurement point based on the range comparison results can be set as needed, and this embodiment is not limited. It can be understood that when the temperature parameter value of the temperature measurement point does not exceed the corresponding normal parameter range, its anomaly level is generally the lowest level; when the number of temperature parameter values ​​of the temperature measurement point that exceed the corresponding normal parameter range is more, its anomaly level is generally higher; when the degree to which the temperature parameter value of the temperature measurement point exceeds the corresponding normal parameter range is greater, its anomaly level is generally higher.

[0140] Furthermore, in one embodiment, after the step S201 of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial regions to obtain the temperature information comparison result, the method further includes:

[0141] Step S205: The spatial regions in each of the target spatial regions whose anomaly level, as represented by the temperature information comparison results, is greater than a preset level, are designated as abnormal spatial regions.

[0142] When the temperature information comparison result is a comparison result representing the anomaly level of the temperature measurement point, if the anomaly level represented by the temperature information comparison result of the temperature measurement point in a certain target space area is greater than the preset level, then the target space area can be regarded as an abnormal space area.

[0143] Furthermore, based on the second and / or third embodiments described above, a third embodiment of the energy storage system safety detection method of the present invention is proposed. In this embodiment, the step S202, which involves analyzing the monitoring parameter information of the target battery cell to obtain the safety monitoring result of the target battery cell, includes:

[0144] Step S2021: Compare the cell temperature change rate of each cell to be monitored in the abnormal space area within the same historical period, and accumulate the number of abnormal cell temperature change rates of the target cell in each historical period.

[0145] In this embodiment, a specific implementation method is proposed to obtain the safety monitoring results of the target battery cell based on the analysis of the monitoring parameter information of the target battery cell.

[0146] Specifically, the monitoring parameter information of the battery cell to be monitored may include the cell temperature change rate over multiple historical periods prior to the safety analysis time. The cell temperature change rates of each battery cell to be monitored within the abnormal space region can be compared over the same historical period to obtain the comparison results for each historical period. These comparison results reflect whether the cell temperature change rate of the target battery cell is abnormal within the corresponding historical period. Based on each comparison result, the number of times the target battery cell has exhibited anomalies (hereinafter referred to as the number of anomalies) can be accumulated. The method of comparing the cell temperature change rates of each battery cell to obtain the comparison results is not limited in this embodiment; for example, the comparison method of measuring temperature parameter values ​​can be referred to in the above embodiment.

[0147] Step S2022: Determine the safety monitoring result of the target battery cell based on the number of anomalies.

[0148] The safety monitoring result of a target battery cell can be determined based on the number of anomalies. In specific implementations, the safety monitoring result of the target battery cell can be determined solely based on the number of anomalies, or it can be determined in conjunction with other analysis results. This embodiment does not limit the method of determining the safety monitoring result of the target battery cell based on the number of anomalies. It is understood that a higher number of anomalies in the target battery cell indicates a greater likelihood of an anomaly or a higher degree of anomaly.

[0149] Further, in one embodiment, the step S202 of analyzing the monitoring parameter information of the target battery cell to obtain the safety monitoring result of the target battery cell includes:

[0150] Step S2023: The duration during which the cell temperature change rate and the fan speed change rate of the target cell are positively correlated;

[0151] This embodiment proposes a specific implementation method for obtaining the safety monitoring results of the target battery cell based on the analysis of the monitoring parameter information of the target battery cell.

[0152] Specifically, the monitoring parameters of the battery cell under test can include the rate of change of cell temperature and the rate of change of fan speed over multiple historical periods prior to the time of safety analysis. The rate of change of cell temperature and the rate of change of fan speed can be compared within the same time period to determine whether they are positively correlated. If both the rate of change of cell temperature and the rate of change of fan speed are positive within a given time period, then a positive correlation is established. This indicates that the cell temperature increased despite the increase in fan speed, suggesting an internal anomaly causing an unusually high temperature.

[0153] It can accumulate the duration for which the cell temperature change rate and fan speed change rate of the target battery cell are positively correlated.

[0154] Step S2024: Determine the safety monitoring result of the target battery cell based on the duration.

[0155] The safety monitoring result of the target battery cell can be determined based on the duration of its operation. In specific embodiments, the safety monitoring result of the target battery cell can be determined solely based on its duration, or it can be determined in conjunction with other analysis results, such as combining the number of anomalies of the target battery cell in the above embodiments. This embodiment does not limit the method of determining the safety monitoring result of the target battery cell based on its duration. It is understood that a longer duration of the target battery cell indicates a greater probability of an anomaly or a higher degree of anomaly.

[0156] In one embodiment, the number of times the target cell's temperature value exceeds a threshold at various historical moments can be accumulated, and the safety monitoring result of the target cell can be determined based on the number of times the threshold is exceeded. It is understood that a higher number of threshold exceedances indicates a greater likelihood of an anomaly or a higher degree of anomaly.

[0157] Furthermore, in one embodiment, an early warning can be issued for the target battery cell when the number of abnormal occurrences exceeds a certain number. An early warning is also issued when the duration of a positive correlation between the target battery cell's temperature change rate and fan speed change rate reaches a preset duration. Furthermore, an early warning is issued when the target battery cell exceeds a certain threshold number of times. If the target battery cell exhibits any of the above three conditions, it can be disconnected for protection and maintenance. If the target battery cell exhibits any two of the above conditions, it can be disconnected and its operation suspended for a period of time before resuming operation.

[0158] Furthermore, in one embodiment, the acquisition, analysis, and processing of monitoring parameter information can be achieved through a centralized control board within the energy storage system (or container). The centralized control board system architecture integrates information acquisition, information analysis and calculation, and system control into a single centralized control board. In another embodiment, such as... Figure 4 As shown, processing can also be based on multiple distributed independent control boards, and the processing results of each independent control board can be summarized and analyzed before system control is performed. In another embodiment, such as... Figure 5 and Figure 6 As shown, information collected within the energy storage system can also be sent to a remote cloud server for analysis and calculation (cloud servers have powerful computing capabilities), and the results can be sent to each energy storage system for control after analysis and processing.

[0159] Furthermore, this invention also proposes a safety monitoring device for an energy storage system, referring to... Figure 7 The energy storage system safety monitoring device includes:

[0160] The acquisition module 10 is used to acquire temperature information measured at various temperature measurement points during the operation of the energy storage system, and to acquire monitoring parameter information obtained by monitoring each cell to be monitored during the operation of the energy storage system. The overall space area where each cell to be monitored is located is divided into a hierarchical structure including at least one level. The multiple space areas divided in each level of the hierarchical structure are further divided into multiple sub-space areas in the next level. A temperature measurement point is set in each space area divided in each level.

[0161] The determining module 20 is used to determine the safety monitoring result of the battery cell to be monitored based on the analysis results of the monitoring parameters corresponding to the battery cell to be monitored and the regional temperature analysis results corresponding to the spatial region at least one level where the battery cell to be monitored is located. The monitoring parameter analysis results are obtained by analyzing the monitoring parameter information of the battery cell to be monitored, and the regional temperature analysis results are obtained by analyzing the temperature information of the temperature measuring points set in the spatial region.

[0162] Furthermore, the determining module 20 is also used for:

[0163] The top layer of the hierarchical structure is taken as the target layer, and each spatial region divided in the top layer is taken as the target spatial region. The temperature information corresponding to the temperature measuring points set in each target spatial region is compared to obtain the temperature information comparison result.

[0164] When it is determined that there is an abnormal space region in each of the target space regions based on the temperature information comparison results, if the target level is the lowest level in the hierarchical structure, then each battery cell to be monitored in the abnormal space region is taken as the target battery cell, and the safety monitoring result of the target battery cell is obtained by analyzing the monitoring parameter information of the target battery cell.

[0165] If the target level is not the lowest level in the hierarchical structure, then the target level is updated to the next level below the target level, the target space region is updated to the sub-space regions divided into the abnormal space region in the next level, and the operation of comparing the temperature information corresponding to the temperature measurement points set in each target space region to obtain the temperature information comparison result is returned.

[0166] Furthermore, the temperature information includes at least one temperature parameter value, and the determining module 20 is also used for:

[0167] Calculate the center value of the temperature parameter values ​​of the same item corresponding to each target temperature measurement point, and determine the normal parameter range corresponding to each temperature parameter value based on the center value, wherein the target temperature measurement point is a temperature measurement point set within the target space area;

[0168] For any one of the target temperature measurement points to be compared, compare any one of the temperature parameter values ​​corresponding to the target temperature measurement point with the corresponding normal parameter range to obtain the range comparison result corresponding to the target temperature parameter value. The range comparison result includes a result indicating whether the target temperature parameter value exceeds the corresponding normal parameter range, and / or a result indicating the degree to which the target temperature parameter value exceeds the corresponding normal parameter range.

[0169] Based on the range comparison results corresponding to the various temperature parameter values ​​of the temperature measurement points to be compared, the temperature information comparison results corresponding to the temperature measurement points to be compared are determined.

[0170] Furthermore, the determining module 20 is also used for:

[0171] The spatial regions whose anomaly level, as represented by the temperature information comparison results, is greater than a preset level are defined as abnormal spatial regions.

[0172] Furthermore, the determining module 20 is also used for:

[0173] When it is determined, based on the temperature information comparison results, that there are normal spatial regions in each of the target spatial regions that do not belong to the abnormal spatial regions, a safety monitoring result is obtained, which indicates that each monitored cell in each of the normal spatial regions is in a normal state.

[0174] Furthermore, the temperature information includes the temperature value measured at the corresponding temperature measurement point at the time of the safety analysis, and the rate of temperature change measured at the corresponding temperature measurement point during at least one historical period prior to the time of the safety analysis.

[0175] The determining module 20 is also used for

[0176] The temperature values ​​at the time corresponding to the temperature measurement points set in each of the target space areas are compared to obtain the temperature comparison results at the time.

[0177] If it is determined that there is a temperature anomaly region in each of the target spatial regions based on the temperature comparison results at the time, then the temperature change rate corresponding to the temperature measurement point set in each of the target spatial regions is compared to obtain the change rate comparison result, and the temperature information comparison result is determined based on the temperature comparison results at the time and the change rate comparison result.

[0178] If it is determined from the time-temperature comparison results that there are no time-temperature anomaly areas in each of the target spatial regions, then the temperature information comparison result is determined from the time-temperature comparison results.

[0179] Furthermore, the monitoring parameter information includes the cell temperature change rate of the cell under monitoring over multiple historical periods prior to the safety analysis time, and the determining module 20 is further used for:

[0180] The temperature change rate of each of the monitored cells within the abnormal space region is compared within the same historical period, and the number of abnormalities in the temperature change rate of the target cell within each historical period is accumulated.

[0181] The safety monitoring results of the target battery cell are determined based on the number of anomalies.

[0182] Furthermore, the monitoring parameter information includes the cell temperature change rate and fan speed change rate of the monitored cell over multiple historical periods prior to the safety analysis time. The determining module 20 is also used for:

[0183] The duration during which the cumulative rate of change of the target battery cell temperature and the rate of change of the fan speed are positively correlated;

[0184] The safety monitoring result of the target battery cell is determined based on the duration of the monitoring.

[0185] Furthermore, the device also includes:

[0186] An execution module is configured to execute anomaly handling measures corresponding to the safety monitoring results of the battery cell under monitoring when the safety monitoring results indicate that the battery cell under monitoring needs to be anomaly handled. The anomaly handling measures include outputting early warning prompts and / or disconnecting connections.

[0187] The extended content of the specific implementation of the energy storage system safety monitoring device of the present invention is basically the same as the various embodiments of the above-mentioned energy storage system safety monitoring method, and will not be repeated here.

[0188] Furthermore, this embodiment of the invention also proposes a computer-readable storage medium storing an energy storage system safety monitoring program, wherein when the energy storage system safety monitoring program is executed by a processor, it implements the steps of the energy storage system safety monitoring method described below.

[0189] The various embodiments of the energy storage system safety monitoring device and computer-readable storage medium of the present invention can all refer to the various embodiments of the energy storage system safety monitoring method of the present invention, and will not be repeated here.

[0190] It should be 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. Unless otherwise specified, 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.

[0191] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0192] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0193] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A method for safety monitoring of an energy storage system, characterized in that, The energy storage system safety monitoring method includes the following steps: The system acquires temperature information measured at various temperature measurement points during the operation of the energy storage system, and acquires monitoring parameter information obtained by monitoring each battery cell under test during the operation of the energy storage system. The overall space area where each battery cell under test is located is divided into a hierarchical structure including at least one level. The multiple space areas divided in each level of the hierarchical structure are further divided into multiple sub-space areas in the next level. A temperature measurement point is set in each space area divided in each level. Based on the analysis results of the monitoring parameters corresponding to the battery cell to be monitored and the analysis results of the regional temperature corresponding to at least one level of the spatial region where the battery cell to be monitored is located, the safety monitoring results of the battery cell to be monitored are determined. The analysis results of the monitoring parameters are obtained by analyzing the monitoring parameter information of the battery cell to be monitored, and the analysis results of the regional temperature are obtained by analyzing the temperature information of the temperature measuring points set in the spatial region. The step of determining the safety monitoring result of the battery cell under monitoring based on the analysis results of the monitoring parameters corresponding to the battery cell under monitoring and the regional temperature analysis results corresponding to at least one level of spatial region where the battery cell under monitoring is located includes: The top layer of the hierarchical structure is taken as the target layer, and each spatial region divided in the top layer is taken as the target spatial region. The temperature information corresponding to the temperature measuring points set in each target spatial region is compared to obtain the temperature information comparison result. When it is determined that there is an abnormal space region in each of the target space regions based on the temperature information comparison results, if the target level is the lowest level in the hierarchical structure, then each battery cell to be monitored in the abnormal space region is taken as the target battery cell, and the safety monitoring result of the target battery cell is obtained by analyzing the monitoring parameter information of the target battery cell. If the target level is not the lowest level in the hierarchical structure, then the target level is updated to the next level below the target level, the target space region is updated to the sub-space regions divided by the abnormal space region in the next level, and the process returns to the step of comparing the temperature information corresponding to the temperature measurement points set in each target space region to obtain the temperature information comparison result.

2. The energy storage system safety monitoring method as described in claim 1, characterized in that, The temperature information includes at least one temperature parameter value, and the step of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial areas to obtain a temperature information comparison result includes: Calculate the center value of the temperature parameter values ​​of the same item corresponding to each target temperature measurement point, and determine the normal parameter range corresponding to each temperature parameter value based on the center value, wherein the target temperature measurement point is a temperature measurement point set within the target space area; For any one of the target temperature measurement points to be compared, compare any one of the temperature parameter values ​​corresponding to the target temperature measurement point with the corresponding normal parameter range to obtain the range comparison result corresponding to the target temperature parameter value. The range comparison result includes a result indicating whether the target temperature parameter value exceeds the corresponding normal parameter range, and / or a result indicating the degree to which the target temperature parameter value exceeds the corresponding normal parameter range. Based on the range comparison results corresponding to the various temperature parameter values ​​of the temperature measurement points to be compared, the temperature information comparison results corresponding to the temperature measurement points to be compared are determined.

3. The energy storage system safety monitoring method as described in claim 2, characterized in that, After the step of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial regions to obtain the temperature information comparison result, the method further includes: The spatial regions whose anomaly level, as represented by the temperature information comparison results, is greater than a preset level are defined as abnormal spatial regions.

4. The energy storage system safety monitoring method as described in claim 1, characterized in that, After the step of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial regions to obtain the temperature information comparison result, the method further includes: When it is determined, based on the temperature information comparison results, that there are normal spatial regions in each of the target spatial regions that do not belong to the abnormal spatial regions, a safety monitoring result is obtained, which indicates that each monitored cell in each of the normal spatial regions is in a normal state.

5. The energy storage system safety monitoring method as described in claim 1, characterized in that, The temperature information includes the temperature value measured at the corresponding temperature measuring point at the time of the safety analysis, and the rate of temperature change measured at the corresponding temperature measuring point during at least one historical period before the time of the safety analysis. The step of comparing the temperature information corresponding to the temperature measuring points set in each of the target spatial regions to obtain the temperature information comparison result includes: The temperature values ​​at the time corresponding to the temperature measurement points set in each of the target space areas are compared to obtain the temperature comparison results at the time. If it is determined that there is a temperature anomaly region in each of the target spatial regions based on the temperature comparison results at the time, then the temperature change rate corresponding to the temperature measurement point set in each of the target spatial regions is compared to obtain the change rate comparison result, and the temperature information comparison result is determined based on the temperature comparison results at the time and the change rate comparison result. If it is determined from the time-temperature comparison results that there are no time-temperature anomaly areas in each of the target spatial regions, then the temperature information comparison result is determined from the time-temperature comparison results.

6. The energy storage system safety monitoring method as described in claim 1, characterized in that, The monitoring parameter information includes the cell temperature change rate of the cell under monitoring during multiple historical periods before the safety analysis time. The step of analyzing the monitoring parameter information of the target cell to obtain the safety monitoring result of the target cell includes: The temperature change rate of each of the monitored cells within the abnormal space region is compared within the same historical period, and the number of abnormalities in the temperature change rate of the target cell within each historical period is accumulated. The safety monitoring results of the target battery cell are determined based on the number of anomalies.

7. The energy storage system safety monitoring method as described in claim 1, characterized in that, The monitoring parameter information includes the cell temperature change rate and fan speed change rate of the cell under monitoring during multiple historical periods before the safety analysis time. The step of analyzing the monitoring parameter information of the target cell to obtain the safety monitoring result of the target cell includes: The duration during which the cumulative rate of change of the target battery cell temperature and the rate of change of the fan speed are positively correlated; The safety monitoring result of the target battery cell is determined based on the duration of the monitoring.

8. The energy storage system safety monitoring method according to any one of claims 1 to 7, characterized in that, After determining the safety monitoring result of the battery cell under monitoring based on the analysis results of the monitoring parameters corresponding to the battery cell under monitoring and the regional temperature analysis results corresponding to at least one level of the spatial region where the battery cell under monitoring is located, the method further includes: When the safety monitoring result of the battery cell under monitoring indicates that the battery cell under monitoring needs to be abnormally handled, the abnormal handling measures corresponding to the safety monitoring result of the battery cell under monitoring shall be executed, wherein the abnormal handling measures include outputting early warning prompts and / or disconnecting connections.

9. A safety monitoring device for an energy storage system, characterized in that, The energy storage system safety monitoring device includes: The acquisition module is used to acquire temperature information measured at various temperature measurement points during the operation of the energy storage system, and to acquire monitoring parameter information obtained by monitoring each cell to be monitored during the operation of the energy storage system. The overall space area where each cell to be monitored is located is divided into a hierarchical structure including at least one level. The multiple space areas divided in each level of the hierarchical structure are further divided into multiple sub-space areas in the next level. A temperature measurement point is set in each space area divided in each level. The determination module is used to determine the safety monitoring result of the battery cell to be monitored based on the analysis results of the monitoring parameters corresponding to the battery cell to be monitored and the analysis results of the regional temperature corresponding to at least one level of the spatial region where the battery cell to be monitored is located. The monitoring parameter analysis results are obtained by analyzing the monitoring parameter information of the battery cell to be monitored, and the regional temperature analysis results are obtained by analyzing the temperature information of the temperature measuring points set in the spatial region. The determining module is also used for: The top layer of the hierarchical structure is taken as the target layer, and each spatial region divided in the top layer is taken as the target spatial region. The temperature information corresponding to the temperature measuring points set in each target spatial region is compared to obtain the temperature information comparison result. When it is determined that there is an abnormal space region in each of the target space regions based on the temperature information comparison results, if the target level is the lowest level in the hierarchical structure, then each battery cell to be monitored in the abnormal space region is taken as the target battery cell, and the safety monitoring result of the target battery cell is obtained by analyzing the monitoring parameter information of the target battery cell. If the target level is not the lowest level in the hierarchical structure, then the target level is updated to the next level below the target level, the target space region is updated to the sub-space regions divided by the abnormal space region in the next level, and the process returns to the step of comparing the temperature information corresponding to the temperature measurement points set in each target space region to obtain the temperature information comparison result.

10. A safety monitoring device for an energy storage system, characterized in that, The energy storage system safety monitoring device includes: a memory, a processor, and an energy storage system safety monitoring program stored in the memory and executable on the processor. When the energy storage system safety monitoring program is executed by the processor, it implements the steps of the energy storage system safety monitoring method as described in any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores an energy storage system safety monitoring program, which, when executed by a processor, implements the steps of the energy storage system safety monitoring method as described in any one of claims 1 to 8.

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