A method, system, computer equipment and storage medium for judging the number and position of pressure relief valves opened in energy storage batteries

Abstract

The present application relates to a method, system, computer equipment and storage medium for determining the number and position of the pressure relief valves opened in an energy storage battery, which includes constructing a plane coordinate system of the energy storage battery module in the energy storage battery system, and performing grid division processing on the plane coordinate system according to the distribution of the energy storage battery module to obtain a plurality of grid areas; constructing a plane sound pressure distribution diagram of the pressure relief valve in the energy storage battery system based on the plane coordinate system; screening out the peak point position of the sound pressure distribution diagram in the grid area; and controlling the position and number of the pressure relief valves opened based on the peak point position. The present application has the effect of improving the accuracy and application environment of measuring pressure relief of energy storage batteries, so as to improve the safety of energy storage battery modules.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage batteries, and in particular to a method, system, computer equipment and storage medium for determining the number and position of open pressure relief valves of energy storage batteries. Background Art

[0002] With the development of battery technology, energy storage battery systems have been widely used in the field of energy storage. In energy storage battery systems, pressure relief valves play a vital role as key safety devices.

[0003] When the internal pressure of the battery rises abnormally, the pressure is released through the pressure relief valve to avoid dangerous situations such as battery overheating or explosion, thereby improving the safety of the entire system.

[0004] However, the traditional method of measuring the opening position and number of pressure relief valves has certain limitations. Mechanical measurement methods are easily disturbed by external factors such as friction and vibration, which leads to reduced measurement accuracy; visual detection methods have high requirements for light conditions. Insufficient light, strong light or changes in light conditions will affect the monitoring effect, and cannot be applied to the environment with limited light inside the battery. These limitations may affect the integrity and safety of the energy storage battery system; therefore, improvements are needed. Summary of the invention

[0005] In order to improve the accuracy and application environment of energy storage battery pressure relief measurement and to improve the safety of energy storage battery modules; the present application provides a method for determining the number and position of open pressure relief valves of energy storage batteries.

[0006] The above-mentioned invention objective of the present application is achieved through the following technical solutions:

[0007] A method for determining the number and position of pressure relief valves opened in an energy storage battery comprises the following steps:

[0008] Constructing a plane coordinate system of an energy storage battery module in an energy storage battery system, and performing grid division processing on the plane coordinate system according to the distribution of the energy storage battery module to obtain a plurality of grid areas;

[0009] Based on the plane coordinate system, construct a plane sound pressure distribution diagram of the pressure relief valve in the energy storage battery system;

[0010] Screening out the peak point position of the sound pressure distribution diagram in the grid area;

[0011] The position and amount of the pressure relief valve opening are controlled based on the peak point position.

[0012] Optionally, the planar coordinate system of the energy storage battery module in the energy storage battery system is constructed, and the planar coordinate system is gridded according to the distribution of the energy storage battery module to obtain a plurality of grid areas; including:

[0013] A coordinate system with the center of the upper surface of the energy storage battery module as the origin, the long side of the energy storage battery module as the x-axis, and the short side of the energy storage battery module as the y-axis, divides the energy storage battery module into LM type equally spaced grids.

[0014] Optionally, constructing a plane sound pressure distribution diagram of the pressure relief valve in the energy storage battery system based on a plane coordinate system includes:

[0015] Controlling an acoustic sensor array preset in the energy storage battery system to collect sound pressure data;

[0016] Preprocessing the sound pressure data, including filtering and denoising;

[0017] Converting the collected sound pressure data into sound pressure values ​​at different locations in the energy storage battery system;

[0018] A plane diagram is constructed, and different sound pressure values ​​are marked on the plane diagram to form areas of sound pressure intensity. Different sound pressure values ​​are associated with different color identifiers, and the color identifiers are mapped to the plane diagram to obtain a plane sound pressure distribution diagram.

[0019] Optionally, the step of screening out the peak point position of the sound pressure distribution diagram in the grid area includes:

[0020] Calculate the sound pressure data collected by the sensor array, calculate the average sound pressure value, and multiply the average sound pressure value by a preset coefficient to obtain a sound pressure threshold value, wherein the preset coefficient is greater than 1;

[0021] A peak point area is set up in the area where each battery pack in the energy storage battery module is located, and each of the peak point areas includes a peak point, and the number of the peak point areas is determined by the number M of the pressure relief valves;

[0022] Find the number of peak points and the corresponding coordinates of the peak points in the plane coordinate system.

[0023] Optionally, the finding the number of peak points and the coordinates corresponding to the peak points in a plane coordinate system includes:

[0024] In the energy storage battery module of the first preset aspect ratio, a square grid of the second preset aspect ratio is selected as a detection area, each detection area contains preset N data points, the energy storage battery module is divided into i detection areas, and each detection area is numbered;

[0025] Constructing a detection window with a third preset aspect ratio, wherein the detection window detects the sound pressure values ​​of N data points in the detection area one by one;

[0026] If the sound pressure value of the data point at the center of the detection window is greater than the sound pressure values ​​of the other data points within the current range of the detection window, then mark the data point currently located at the center of the detection window as a local maximum point; otherwise, move the detection window until the sound pressure value of the data point at the center of the detection window is greater than the sound pressure values ​​of the other data points within the current range of the detection window;

[0027] Record the moving route of the detection window and retain the coordinates of the data points;

[0028] The detection window detects the 1st to the i-th detection areas in sequence, and when the detection window moves to the detection area in the recorded moving route, the coordinates of the local maximum point in the moving route are output.

[0029] Optionally, the step of finding the number of peak points and the coordinates corresponding to the peak points in a plane coordinate system further includes:

[0030] Determine whether the sound pressure values ​​of all the local maximum points exceed the sound pressure threshold, if so, retain the local maximum point, if not, discard the local maximum point;

[0031] Then, the sound pressure values ​​of the local maximum points are compared in each peak point area. If two or more local maximum points appear, the largest local maximum point is retained as the peak point.

[0032] Optionally, the detection window detects the 1st to the i-th detection areas in sequence, and when the detection window moves to the detection area in the recorded moving route, the coordinates of the local maximum point in the moving route are output, including:

[0033] storing the moving route of the detection window in a predefined data structure, wherein the moving route of the detection window includes the moving route of the center point of the detection window;

[0034] Each time the detection window moves, the coordinates of all the data points that the center point of the detection window passes through are stored in a defined data structure, and the coordinates of the final position of the detection window movement are used as output.

[0035] The second object of the invention is achieved by the following technical solutions:

[0036] A system for determining the number and position of pressure relief valves opened in an energy storage battery is used to execute a method for determining the number and position of pressure relief valves opened in an energy storage battery.

[0037] The third objective of the present application is achieved through the following technical solutions:

[0038] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method for determining the number and position of opened pressure relief valves of an energy storage battery are implemented.

[0039] The fourth objective of the present application is achieved through the following technical solutions:

[0040] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned method for determining the number and position of opened pressure relief valves of an energy storage battery.

[0041] In summary, the present application includes at least one of the following beneficial technical effects:

[0042] 1. Acquire sound pressure data through an acoustic sensor array and convert it into a plane sound pressure distribution map using acoustic imaging technology, which can accurately provide the sound pressure data basis of the pressure relief valve. The data is accurate and has a wide range of applications. It is not affected by ambient light and is mapped through color changes, making it easy to distinguish the sound pressure value of the pressure relief valve. When a failure occurs in the energy storage battery module, the positioning of the pressure relief valve in the plane coordinate system can quickly and accurately determine the number and position of the pressure relief valves opened, which has the advantages of safety, efficiency, precise positioning, and high spatial resolution.

[0043] 2. By recording the coordinates of the data points on the moving line of the detection window, the efficiency of peak point detection and screening is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a flowchart of an implementation of a method for determining the number and position of open pressure relief valves of an energy storage battery according to the present application;

[0045] Figure 2 It is a plane sound pressure distribution diagram in an embodiment of a method for determining the number and position of opening pressure relief valves of an energy storage battery in the present application;

[0046] Figure 3 It is a layout diagram of an acoustic sensor array in an embodiment of a method for determining the number and position of opened pressure relief valves of an energy storage battery of the present application;

[0047] Figure 4 This is a principle block diagram of a computer device of the present application. DETAILED DESCRIPTION

[0048] The following is combined with Figure 1-4 This application is described in further detail.

[0049] In one embodiment, if Figure 1As shown, the present application discloses a method for determining the number and position of the open pressure relief valves of an energy storage battery, which specifically includes the following steps:

[0050] S10: constructing a plane coordinate system of the energy storage battery module in the energy storage battery system, and performing grid division processing on the plane coordinate system according to the distribution of the energy storage battery module to obtain a plurality of grid areas;

[0051] In this embodiment, the center of the upper surface of the energy storage battery module is used as the origin of the coordinate system, the long side is the x-axis, and the short side is the y-axis. The energy storage battery module is divided into LM equally spaced grids. The LM grid is a grid type used in numerical calculations. Taking a 0.8m energy storage battery box as an example, the energy storage battery module is divided into 0.01m equally spaced grids, and 6561 data points can be obtained.

[0052] S20: constructing a plane sound pressure distribution diagram of the pressure relief valve in the energy storage battery system based on a plane coordinate system;

[0053] In this embodiment, refer to Figure 2 ,include:

[0054] Arrangement of acoustic sensors and collection of sound pressure data: Arrange an acoustic sensor array in the energy storage battery system, select the sensor array formation and arrange the sensor array according to the structure of the energy storage battery system and the distribution of the sound field, and collect sound pressure data at different positions in the energy storage battery system through the sensor array;

[0055] When the pressure relief valve discharges excess gas, it causes rapid flow of gas and generates high-frequency noise. When selecting the sensor array formation, priority is given to the positioning effect under high-frequency noise. According to the structure of the battery energy storage system and the distribution of the sound field, the positioning effects of the linear array, cross array, circular array, wheel array, Archimedean spiral array, spiral array and other array formations under high-frequency noise are analyzed and compared. It can be seen that for high-frequency sound sources, the circular array, wheel array, Archimedean spiral array and spiral array can effectively identify the location of the sound source, and the positioning effect of the spiral array is better than that of the Archimedean spiral array, wheel array and circular array respectively. However, considering the limited internal space of the energy storage battery, the spiral array and Archimedean spiral array require a large number of array elements and a large array size, which are not suitable for application in the energy storage battery system. The acoustic imaging effect of the wheel array is better than that of the circular array, and there is a significant difference between the main lobe and the side lobe, with good spatial resolution. Therefore, the wheel array formation is selected as the installation formation of the acoustic sensor array.

[0056] 0.8m Taking the 0.8m energy storage battery box as an example, the parameter sensitivity analysis of the wheel array can obtain the array installation position and array element distribution position with the best positioning effect. Figure 3As shown, the number of wheel-shaped array elements is 25, the array diameter is 0.8m, the array inner diameter is 0.1m, and the number of array arms is 5.

[0057] Data preprocessing: Filter the collected sound pressure data to remove low-frequency noise and interference signals, and use digital signal processing technology to achieve filtering and denoising;

[0058] Sound field reconstruction technology: The sound field reconstruction technology is used to convert the processed sound pressure data into a sound field model, and the beamforming algorithm is used to integrate the data of multiple sensors to accurately reconstruct the spatial distribution of the sound field;

[0059] Plane sound pressure distribution map generation: project the sound field model onto the plane map, and mark different sound pressure values ​​on the plane map to form areas of sound pressure intensity, associate different sound pressure values ​​with different color identifiers, and map the color identifiers to the plane map to obtain a plane sound pressure distribution map.

[0060] S30: Filtering out the peak point position of the sound pressure distribution diagram in the grid area;

[0061] In this embodiment, it includes:

[0062] Setting the sound pressure threshold: Calculate the average sound pressure of the sensor array, and multiply the average sound pressure by a preset coefficient greater than 1 to obtain the sound pressure threshold; in this embodiment, 3 times the average sound pressure is set as the sound pressure threshold;

[0063] Setting peak point areas: A peak point area is set up in the area where each battery pack in the energy storage battery module is located. Each peak point area includes a peak point. In this embodiment, only one peak point is allowed to appear in each peak point area. The number of peak point areas is determined by the number M of pressure relief valves of the energy storage battery;

[0064] Find the number and coordinates of peak points.

[0065] Among them, finding the number and coordinates of peak points includes:

[0066] Divide the detection area and number the detection area: In the energy storage battery module of Bm, select 2Lm A 2Lm square grid is used as a detection area. Each detection area contains 9 data points, which divides the energy storage battery module into i small areas, i=(A B) / (4L²), number each small area;

[0067] In this embodiment, the size of the energy storage battery module is 0.8m 0.8m, divided into 0.01m equally spaced grids, select 0.02m A square grid of 0.02 m is used as a detection area, resulting in a total of 1600 detection areas, each containing 9 data points;

[0068] Find local maximum points: the default detection window size is 2Lm 2Lm, the detection window starts from the first detection area, and checks the sound pressure values ​​of the 9 data points within the window range. If the sound pressure value of the data point at the center of the window is greater than the values ​​of the other data points within the detection window range, then mark the data point as a local maximum point; otherwise, move the center of the detection window to the data point with the largest sound pressure value, and repeat the above judgment until the sound pressure value of the latest data point at the center of the detection window is greater than the values ​​of the other data points within the window range. At this time, mark the data point as a local maximum point, record the movement route of the detection window this time, and retain the coordinate position of the data point;

[0069] Find all local maximum points: The window starts from the 1st to the i-th small area in turn, and repeats the steps of finding local maximum points; if the detection window moves to the detection area in the recorded route, the coordinate position of the local maximum point in the moving route is directly output;

[0070] Identify the number and coordinates of peak points: determine whether the sound pressure values ​​of all local maximum points exceed the sound pressure threshold. If so, retain the maximum point, otherwise discard the maximum point; then compare the sound pressure values ​​of the maximum points in each peak point area. If two or more maximum points appear, retain the largest maximum point as the peak point; finally output the number of peak points and their position coordinates.

[0071] Furthermore, the moving route of the detection window is the moving route of the center point of the detection window. A data structure is defined to store the moving route of the detection window. Each time the detection window moves, the coordinate positions of all data points passed by the center point of the detection window are stored in the defined data structure, and the final position coordinates of the detection window movement are used as output.

[0072] Determine whether the detection window has moved to the recorded route. After each detection window movement, compare the center point coordinates of the new detection window with the data points stored in the data structure. If the point coordinates are consistent with the data point coordinates stored in the data structure, output the final position coordinates on the path.

[0073] S40: Controlling the opening position and amount of the pressure relief valve based on the peak point position.

[0074] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0075] In one embodiment, a system for determining the number and position of opened pressure relief valves of an energy storage battery is provided. The system for determining the number and position of opened pressure relief valves of an energy storage battery comprises:

[0076] The specific definition of the system for judging the number and position of the pressure relief valves of the energy storage battery can be found in the above definition of a method for judging the number and position of the pressure relief valves of the energy storage battery, which will not be repeated here. Each module in the above-mentioned system for judging the number and position of the pressure relief valves of the energy storage battery can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0077] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 4 As shown. The computer device includes a processor, a memory, a network interface and a database connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for determining the number and position of the open pressure relief valves of the energy storage battery is implemented.

[0078] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, a method for determining the number and position of open pressure relief valves of an energy storage battery is implemented.

[0079] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, a method for determining the number and position of opened pressure relief valves of an energy storage battery is implemented.

[0080] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0081] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0082] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for determining the number and position of open pressure relief valves of an energy storage battery, characterized in that: The method comprises the steps of: constructing a plane coordinate system of an energy storage battery module in an energy storage battery system, and performing grid division processing on the plane coordinate system according to the distribution of the energy storage battery module to obtain a plurality of grid areas; Based on the plane coordinate system, construct a plane sound pressure distribution diagram of the pressure relief valve in the energy storage battery system; Screening out the peak point positions of the sound pressure distribution diagram in the plurality of grid areas; Control the position and amount of the pressure relief valve opening based on the peak point position; In the energy storage battery module of the first preset aspect ratio, a square grid of the second preset aspect ratio is selected as a detection area, each detection area contains preset N data points, the energy storage battery module is divided into i detection areas, and each detection area is numbered; Constructing a detection window with a third preset aspect ratio, wherein the detection window detects the sound pressure values ​​of N data points in the detection area one by one; If the sound pressure value of the data point at the center of the detection window is greater than the sound pressure values ​​of the other data points within the current range of the detection window, then mark the data point currently located at the center of the detection window as a local maximum point; otherwise, move the detection window until the sound pressure value of the data point at the center of the detection window is greater than the sound pressure values ​​of the other data points within the current range of the detection window; Record the moving route of the detection window and retain the coordinates of the data points; The detection window detects the 1st to the i-th detection areas in sequence, and when the detection window moves to the detection area in the recorded moving route, the coordinates of the local maximum point in the moving route are output; The detection window detects the 1st to the i-th detection areas in sequence. When the detection window moves to the detection area in the recorded moving route, the coordinates of the local maximum point in the moving route are output, including: storing the moving route of the detection window in a predefined data structure, wherein the moving route of the detection window includes the moving route of the center point of the detection window; Each time the detection window moves, the coordinates of all the data points that the center point of the detection window passes through are stored in a defined data structure, and the coordinates of the final position of the detection window movement are used as output; The moving route of the detection window is the moving route of the center point of the detection window. A data structure is defined to store the moving route of the detection window. Each time the detection window moves, the coordinates of all data points passed by the center point of the detection window are stored in the defined data structure, and the final position coordinates of the detection window movement are used as output. Determine whether the detection window has moved to the recorded route. After each detection window movement, compare the coordinates of the center point of the new detection window with the data points stored in the data structure. If the coordinates of the point are consistent with the coordinates of the data points stored in the data structure, output the final position coordinates on the path. The step of screening out the peak point positions of the sound pressure distribution diagram in the plurality of grid areas comprises: Calculate the sound pressure data collected by the sensor array, calculate the average sound pressure value, and multiply the average sound pressure value by a preset coefficient to obtain a sound pressure threshold value, wherein the preset coefficient is greater than 1; A peak point area is set up in the area where each battery pack in the energy storage battery module is located, and each of the peak point areas includes a peak point, and the number of the peak point areas is determined by the number M of the pressure relief valves; Find the number of peak points and the corresponding coordinates of the peak points in the plane coordinate system.

2. A method for determining the number and position of open pressure relief valves of an energy storage battery according to claim 1, characterized in that: The planar coordinate system of the energy storage battery module in the energy storage battery system is constructed, and the planar coordinate system is grid-divided according to the distribution of the energy storage battery module to obtain a plurality of grid areas; including: A coordinate system with the center of the upper surface of the energy storage battery module as the origin, the long side of the energy storage battery module as the x-axis, and the short side of the energy storage battery module as the y-axis, divides the energy storage battery module into LM type equally spaced grids.

3. A method for determining the number and position of open pressure relief valves of an energy storage battery according to claim 1, characterized in that: The method of constructing a plane sound pressure distribution diagram of the pressure relief valve in the energy storage battery system based on a plane coordinate system comprises: Controlling an acoustic sensor array preset in the energy storage battery system to collect sound pressure data; Preprocessing the sound pressure data, including filtering and denoising; Converting the collected sound pressure data into sound pressure values ​​at different locations in the energy storage battery system; A plane diagram is constructed, and different sound pressure values ​​are marked on the plane diagram to form areas of sound pressure intensity. Different sound pressure values ​​are associated with different color identifiers, and the color identifiers are mapped to the plane diagram to obtain a plane sound pressure distribution diagram.

4. A method for determining the number and position of open pressure relief valves of an energy storage battery according to claim 1, characterized in that: Determine whether the sound pressure values ​​of all the local maximum points exceed the sound pressure threshold, if so, retain the local maximum point, if not, discard the local maximum point; Then, the sound pressure values ​​of the local maximum points are compared in each peak point area. If two or more local maximum points appear, the largest local maximum point is retained as the peak point.

5. A system for determining the number and position of open pressure relief valves of energy storage batteries, characterized in that: Used to execute a method for determining the number and position of opened pressure relief valves of an energy storage battery as described in any one of claims 1 to 4.

6. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for determining the number and position of the opened pressure relief valves of an energy storage battery as described in any one of claims 1 to 4 are implemented.

7. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of a method for determining the number and position of open pressure relief valves of an energy storage battery as described in any one of claims 1 to 4 are implemented.

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