Method for checking relief area of explosion relief valve, computer device and storage medium

Abstract

The application provides a method for checking a relief area of an explosion-proof valve, a computer device and a storage medium. The method specifically comprises: obtaining a gas generation relief area and a gas expansion relief area required before explosion of an explosion-proof valve of a battery pack to be tested in an explosion-proof valve test process; and checking the relief area of the explosion-proof valve according to the gas generation relief area and the gas expansion relief area.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a method for verifying the pressure relief area of ​​an explosion-proof valve, a computer device, and a storage medium. Background Technology

[0002] A battery pack explosion-proof valve is a safety device used to prevent battery packs from exploding under abnormal conditions. Its main function is to prevent the battery pack from exploding by rapidly releasing pressure when the internal pressure reaches a certain value, thereby ensuring the safety of the battery pack and its surrounding environment. If the explosion-proof valve is poorly designed, it can create certain safety hazards.

[0003] In related technologies, the verification method for the pressure relief area of ​​explosion-proof valves is unreasonable and has low accuracy. Summary of the Invention

[0004] This application provides a method for verifying the pressure relief area of ​​an explosion-proof valve, a computer device, and a storage medium, aiming to improve the accuracy of the verification of the pressure relief area of ​​an explosion-proof valve by providing a reasonable method for verifying the pressure relief area of ​​an explosion-proof valve.

[0005] In a first aspect, embodiments of this application provide a method for verifying the pressure relief area of ​​an explosion-proof valve, the method comprising:

[0006] During the explosion-proof valve test, the required gas generation and pressure relief area and gas expansion and pressure relief area of ​​the explosion-proof valve of the battery pack under test are obtained before the explosion-proof valve bursts.

[0007] The pressure relief area of ​​the explosion-proof valve is verified based on the gas production pressure relief area and the gas expansion pressure relief area.

[0008] Secondly, embodiments of this application provide a device for verifying the pressure relief area of ​​an explosion-proof valve, the device comprising:

[0009] The first acquisition unit is used to acquire the gas generation and pressure relief area and the gas expansion and pressure relief area required before the explosion-proof valve of the battery pack under test is ruptured during the explosion-proof valve test.

[0010] The first verification unit is used to verify the pressure relief area of ​​the explosion-proof valve based on the gas generation pressure relief area and the gas expansion pressure relief area.

[0011] Thirdly, embodiments of this application provide a computer device, the computer device comprising:

[0012] One or more processors;

[0013] Memory; and

[0014] One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the explosion-proof valve pressure relief area verification method as described in the first aspect.

[0015] Fourthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, the computer program being loaded by a processor to perform the steps in the explosion-proof valve pressure relief area verification method as described in the first aspect.

[0016] Fifthly, embodiments of this application provide a computer program product, including a computer program or instructions, which, when executed by a processor, follow the steps in the explosion-proof valve pressure relief area verification method described in the first aspect.

[0017] In this embodiment, the required gas generation and pressure relief area and gas expansion and pressure relief area of ​​the explosion-proof valve of the battery pack under test are obtained and analyzed during the explosion-proof valve test. The analysis considers not only the required gas generation and pressure relief area before the explosion-proof valve explodes, but also the pressure relief area required due to the gas expansion in the original gas cavity of the battery pack. This makes the data for the verification lock more accurate, improves the accuracy of the explosion-proof valve verification, and thus improves the safety of the explosion-proof valve. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram illustrating an application scenario of the explosion-proof valve pressure relief area verification method provided in this application embodiment;

[0020] Figure 2 This is a schematic flowchart of an embodiment of the explosion-proof valve pressure relief area verification method provided in this application.

[0021] Figure 3 This is a schematic diagram of an embodiment of the explosion-proof valve pressure relief area verification device provided in this application.

[0022] Figure 4 This is a schematic diagram of an embodiment of the computer device provided in this application. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0024] Because the verification method for the pressure relief area of ​​explosion-proof valves in related technologies is unreasonable, for example, considering only one aspect results in low accuracy.

[0025] In view of this, embodiments of this application provide a method, computer equipment, and storage medium for verifying the pressure relief area of ​​an explosion-proof valve. This method can obtain and analyze the required gas generation and pressure relief area of ​​the battery pack under test before the explosion-proof valve bursts during the test. It considers not only the required gas generation and pressure relief area before the explosion-proof valve bursts but also the pressure relief area required due to the gas expansion within the battery pack cavity. This makes the verification reference data more accurate, improves the accuracy of the explosion-proof valve verification, and thus enhances the safety of the explosion-proof valve.

[0026] Please see Figure 1 The embodiments of this application can be applied to, for example, Figure 1 The application scenario shown includes a terminal device 102 and a server 104. The terminal device 102 can be a device that includes both receiving and transmitting hardware, that is, a device with receiving and transmitting hardware capable of performing bidirectional communication on a bidirectional communication link. The terminal device 102 and the server 104 can communicate bidirectionally via a network.

[0027] For example, terminal device 102 acquires the required gas generation and pressure relief area and the gas expansion and pressure relief area of ​​the explosion-proof valve of the battery pack under test before it bursts; and verifies the pressure relief area of ​​the explosion-proof valve based on the gas generation and pressure relief area and the gas expansion and pressure relief area. Alternatively, the above steps can also be performed by server 104. Terminal device 102, for example, is a test terminal. Terminal device 102 receives the required gas generation and pressure relief area and the gas expansion and pressure relief area of ​​the explosion-proof valve of the battery pack under test sent by server 104, and verifies the pressure relief area of ​​the explosion-proof valve based on the gas generation and pressure relief area and the gas expansion and pressure relief area. Alternatively, the above method can be performed collaboratively by terminal device 102 and server 104. For example, terminal device 102 can call the verification data from server 104, or terminal device 102 can download the verification data from server 104 and store it in local storage space, etc.

[0028] The terminal devices include, but are not limited to, one or more of the following: mobile phones, computers, IoT devices, testing equipment, and portable wearable devices. IoT devices may include testing equipment, etc. Portable wearable devices may include one or more of the following: smartwatches, smart bracelets, smart glasses, and head-mounted devices, etc.

[0029] The server includes, but is not limited to, one or more of the following: mobile phones, computers, IoT devices, testing equipment, and portable wearable devices.

[0030] The following is a detailed description in conjunction with the accompanying drawings. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments. Although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown in the drawings.

[0031] Please see Figure 2 This paper provides a method for verifying the pressure relief area of ​​an explosion-proof valve, applicable to computer equipment. The following description uses the application of this method to computer equipment as an example, and the method includes steps 201-202:

[0032] 201. During the explosion-proof valve test, obtain the gas generation and pressure relief area and the gas expansion and pressure relief area required before the explosion-proof valve of the battery pack under test is ruptured.

[0033] Explosion-proof valve testing may include performing adiabatic accelerated rate calorimetry (ARC) testing on the battery. Specifically, this is a test method used to evaluate the thermal runaway behavior of materials or batteries under adiabatic conditions. Based on adiabatic principles, this test can use large sample volumes and has high sensitivity, accurately measuring the initial temperature, temperature, and pressure changes over time during the thermal decomposition process.

[0034] It should be noted that the aforementioned battery can be a battery pack or a cell within a battery pack.

[0035] Specifically, the required gas generation and pressure relief area and gas expansion and pressure relief area of ​​the explosion-proof valve of the battery pack under test before its explosion can be obtained through experimental testing. Alternatively, these parameters can be obtained in advance and stored in the corresponding target storage device. When step 202 is required, the required gas generation and pressure relief area and gas expansion and pressure relief area of ​​the explosion-proof valve of the battery pack under test can be obtained by calling or reading the target storage device.

[0036] For details on how to obtain the required gas generation and pressure relief area and gas expansion and pressure relief area of ​​the explosion-proof valve of the battery pack under test before explosion through experimental testing, please refer to the following specific embodiments.

[0037] In some embodiments, obtaining the required gas generation and pressure relief area of ​​the explosion-proof valve of the battery pack under test before it bursts during the explosion-proof valve test includes: obtaining the gas generation rate of the battery pack under test during the explosion-proof valve test; obtaining the through area value and permeability of the explosion-proof valve of the battery pack under test; and determining the required gas generation and pressure relief area of ​​the explosion-proof valve of the battery pack under test before it bursts during the explosion-proof valve test based on the gas generation rate, through area value, and permeability.

[0038] Among them, the gas generation rate refers to the amount of gas generated per unit time during battery operation or thermal runaway, while the through area value of the explosion-proof valve refers to the maximum cross-sectional area through which gas is allowed to pass inside the explosion-proof valve, and the permeability refers to the amount of gas passing through the explosion-proof valve per unit time.

[0039] Alternatively, the gas production rate of the battery pack can be determined by conducting ARC testing experiments on the battery.

[0040] Optionally, the explosion-proof valve design may include a stacked, straight-through-hole baffle structure. These structures have protective steel plates on the sides and internal perforations and arc-shaped air passages. To measure the area of ​​the straight passage, the following steps can be used:

[0041] Physical measurement method: Directly measure the dimensions of the through hole and the blocking plate inside the explosion-proof valve, and then calculate the total cross-sectional area.

[0042] Image measurement method: High-precision image measurement equipment is used to scan the internal structure of the explosion-proof valve to obtain detailed two-dimensional or three-dimensional images, and then the through area is calculated by image processing software.

[0043] Optionally, air permeability measurements need to be performed under a specific pressure differential to ensure the accuracy of the results. The specific measurement steps are as follows:

[0044] Establish a test environment: Install the explosion-proof valve in a sealed test environment to ensure that it will not be affected by external interference during the test.

[0045] Apply a pressure difference: Apply a known pressure difference across the two ends of the explosion-proof valve, for example, by using compressed air or other gas sources.

[0046] Record gas flow rate: Use a flow meter or other gas flow measurement equipment to record the amount of gas passing through the explosion-proof valve within a certain period of time.

[0047] Calculate air permeability: Based on the recorded gas flow rate and the applied pressure difference, calculate the air permeability. The formula is: Air permeability = Flow rate (volume / time) / Pressure difference (pressure).

[0048] It should be noted that, to avoid the influence of environmental factors on the test results, it is necessary to ensure that the temperature, humidity, and other conditions of the test environment meet the standard requirements. To improve the reliability of the measurement results, multiple repeated tests can be performed, and the average value can be taken as the final result.

[0049] In other alternatives, the through area value and breathability can also be provided directly by the manufacturer.

[0050] Optionally, after obtaining the gas generation rate of the battery pack under test during the explosion-proof valve test, as well as the through area and permeability of the explosion-proof valve of the battery pack under test, the required gas generation and pressure relief area S of the explosion-proof valve of the battery pack under test before explosion can be calculated using the following formula (1):

[0051] S=(V Q *S1) / V T (1)

[0052] Where S is the gas production and pressure relief area, V Q V represents the gas production rate after a single battery cell fails, S1 is the straight-through area of ​​the explosion-proof valve, and V T This refers to the air permeability of the explosion-proof valve.

[0053] In some embodiments, obtaining the gas expansion and pressure relief area required for the explosion-proof valve of the battery pack under test before its explosion during the explosion-proof valve test may specifically include: obtaining the through area value and permeability of the explosion-proof valve of the battery pack under test; obtaining the gas expansion rate of the battery pack under test after temperature change during the explosion-proof valve test; and determining the gas expansion and pressure relief area required for the explosion-proof valve of the battery pack under test before its explosion during the explosion-proof valve test based on the gas expansion rate, through area value, and permeability.

[0054] Optionally, obtaining the gas expansion rate of the battery pack under test after temperature change during the explosion-proof valve test includes: obtaining the volume value of the battery pack under test; obtaining the temperature difference value of the battery pack under test within a preset time period; and determining the gas expansion rate of the battery pack under test after temperature change during the explosion-proof valve test based on the volume value, the temperature difference value, and the duration value corresponding to the preset time period.

[0055] The volume value refers to the net volume of the battery pack, which can be obtained by subtracting the volume of the battery modules within the battery pack. The preset time period can be the temperature change period of thermal runaway (i.e., the preset time period is equivalent to the temperature change period of thermal runaway). This time period can be obtained through actual experimental measurement or it can be preset; there are no specific limitations. The temperature difference value refers to the difference between the highest temperature and the initial temperature during the temperature change process. Both the initial temperature and the highest temperature can be collected using appropriate temperature detection equipment.

[0056] Optionally, after obtaining the volume value, temperature difference value, and duration value corresponding to the preset time period, the gas expansion rate V3 of the battery pack under test after temperature change during the explosion-proof valve test can be calculated using the following formula (2):

[0057] V3=(V*ΔT) / 273t (2)

[0058] Where V3 is the gas expansion rate after temperature change, V is the net volume inside the battery pack, and ΔT is the temperature difference after temperature change.

[0059] Optionally, after obtaining the gas expansion rate, the through area value, and the permeability, the required gas expansion and depressurization area S2 of the explosion-proof valve of the battery pack under test before bursting during the explosion-proof valve test can be calculated using the following formula (3):

[0060] S2=(V3*S1) / V T (3)

[0061] Where S2 is the pressure relief area required for gas expansion, V3 is the gas expansion rate after temperature change, S1 is the straight-through area value of the explosion-proof valve, and V T This refers to the air permeability of the explosion-proof valve.

[0062] 202. Verify the pressure relief area of ​​the explosion-proof valve based on the gas generation pressure relief area and the gas expansion pressure relief area.

[0063] In some embodiments, the step of verifying the pressure relief area of ​​the explosion-proof valve based on the gas generation pressure relief area and the gas expansion pressure relief area may specifically include: determining the sum of the areas of the gas generation pressure relief area and the gas expansion pressure relief area; and verifying the pressure relief area of ​​the explosion-proof valve based on the sum of the areas.

[0064] Optionally, the sum of the areas of the gas-generating pressure relief area and the gas expansion pressure relief area can be determined using the following formula (4):

[0065] S3 = S + S2 (4)

[0066] Where S3 is the sum of the areas of the gas production and pressure relief area and the gas expansion and pressure relief area, S is the gas production and pressure relief area, and S2 is the gas expansion and pressure relief area.

[0067] Optionally, the step of verifying the pressure relief area of ​​the explosion-proof valve based on the area and value includes: optimizing the area and value according to a preset safety factor to obtain an optimized target area value; and verifying the pressure relief area of ​​the explosion-proof valve based on the target area value.

[0068] In reality, due to errors in parameters such as the net volume of the battery pack and abrupt changes in temperature, the calculated area and value may contain certain errors.

[0069] In view of this, the embodiments of this application introduce a safety factor to optimize the previously calculated area and value, thereby further improving the rationality and accuracy of the verification.

[0070] The safety factor can be preset or obtained through empirical methods; the specific method of obtaining it is not limited.

[0071] Alternatively, the area and value can be optimized using the following formula (5):

[0072] S4=a*S3 (5)

[0073] Where S4 is the optimized target area value, a is the safety factor, and S3 is the sum of the areas.

[0074] Optionally, the step of verifying the pressure relief area of ​​the explosion-proof valve based on the target area value includes: obtaining the through area value of the explosion-proof valve; and verifying the pressure relief area of ​​the explosion-proof valve based on the comparison result between the target area value and the through area value.

[0075] Optionally, the step of verifying the pressure relief area of ​​the explosion-proof valve based on the comparison result of the target area value and the through area value includes: if the comparison result is that the target area value is greater than the through area value, then it is determined that the pressure relief area verification of the explosion-proof valve fails; if the comparison result is that the target area value is less than or equal to the through area value, then it is determined that the pressure relief area verification of the explosion-proof valve passes.

[0076] In this embodiment, the required gas generation and pressure relief area and gas expansion and pressure relief area of ​​the explosion-proof valve of the battery pack under test before the explosion-proof valve bursts are obtained and analyzed during the explosion-proof valve test. This analysis not only considers the required gas generation and pressure relief area before the explosion-proof valve bursts, but also the pressure relief area required due to the gas expansion of the original gas in the battery pack cavity. As a result, the data referenced for the verification lock is more accurate, the accuracy of the explosion-proof valve verification is improved, and thus the safety of the explosion-proof valve is enhanced.

[0077] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0078] Based on the same inventive concept, this application also provides an explosion-proof valve pressure relief area verification device for implementing the explosion-proof valve pressure relief area verification method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more embodiments of the explosion-proof valve pressure relief area verification device provided below can be found in the limitations of the explosion-proof valve pressure relief area verification method described above, and will not be repeated here.

[0079] Please see Figure 3 A device for verifying the pressure relief area of ​​an explosion-proof valve is provided. This device 300 can be integrated into a computer device and includes a first acquisition unit 301 and a first verification unit 302, wherein:

[0080] The first acquisition unit 301 is used to acquire the gas generation and pressure relief area and the gas expansion and pressure relief area required before the explosion-proof valve of the battery pack under test is ruptured during the explosion-proof valve test.

[0081] The first verification unit 302 is used to verify the pressure relief area of ​​the explosion-proof valve based on the gas generation pressure relief area and the gas expansion pressure relief area.

[0082] In some embodiments, the explosion-proof valve pressure relief area verification device is specifically used for:

[0083] Determine the area and value of the gas production pressure relief area and the gas expansion pressure relief area;

[0084] The pressure relief area of ​​the explosion-proof valve is checked based on the area and value.

[0085] In some embodiments, the explosion-proof valve pressure relief area verification device is specifically used for:

[0086] The area and value are optimized based on a preset safety factor to obtain the optimized target area value;

[0087] The pressure relief area of ​​the explosion-proof valve is checked based on the target area value.

[0088] In some embodiments, the explosion-proof valve pressure relief area verification device is specifically used for:

[0089] Obtain the through area value of the explosion-proof valve;

[0090] The pressure relief area of ​​the explosion-proof valve is verified based on the comparison result between the target area value and the through area value.

[0091] In some embodiments, the explosion-proof valve pressure relief area verification device is specifically used for:

[0092] If the comparison result shows that the target area value is greater than the straight-through area value, then the pressure relief area verification of the explosion-proof valve is determined to be unsuccessful.

[0093] If the comparison result shows that the target area value is less than or equal to the through area value, then the pressure relief area verification of the explosion-proof valve is determined to be passed.

[0094] In some embodiments, the explosion-proof valve pressure relief area verification device is specifically used for:

[0095] Obtain the gas generation rate of the battery pack under test during the explosion-proof valve test;

[0096] Obtain the through area and air permeability of the explosion-proof valve of the battery pack under test;

[0097] Based on the gas generation rate, the straight-through area value, and the air permeability, determine the gas generation and pressure relief area required for the explosion-proof valve of the battery pack under test before it explodes during the explosion-proof valve test.

[0098] In some embodiments, the explosion-proof valve pressure relief area verification device is specifically used for:

[0099] Obtain the through area and air permeability of the explosion-proof valve of the battery pack under test;

[0100] Obtain the gas expansion rate of the battery pack under test after temperature change during the explosion-proof valve test;

[0101] Based on the gas expansion rate, the straight-through area value, and the air permeability, determine the gas expansion and pressure relief area required for the explosion-proof valve of the battery pack under test before it bursts during the explosion-proof valve test.

[0102] In some embodiments, the explosion-proof valve pressure relief area verification device is specifically used for:

[0103] Obtain the volume value of the battery pack under test;

[0104] Obtain the temperature difference value of the battery pack under test within a preset time period;

[0105] Based on the volume value, temperature difference value, and duration value corresponding to the preset time period, the gas expansion rate of the battery pack under test after temperature change during the explosion-proof valve test is determined.

[0106] In this embodiment, the required gas generation and pressure relief area and gas expansion and pressure relief area of ​​the explosion-proof valve of the battery pack under test are obtained and analyzed during the explosion-proof valve test. The analysis considers not only the required gas generation and pressure relief area before the explosion-proof valve explodes, but also the pressure relief area required due to the gas expansion in the original gas cavity of the battery pack. This makes the data for the verification lock more accurate, improves the accuracy of the explosion-proof valve verification, and thus improves the safety of the explosion-proof valve.

[0107] Each module in the aforementioned devices can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the control device in hardware form or independently of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0108] Accordingly, embodiments of this application also provide a computer device, which may be a terminal device or a server.

[0109] like Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. The computer device 1200 includes a processor 1201 with one or more processing cores, a memory 1202 with one or more computer-readable storage media, and a computer program stored on the memory 1202 and executable on the processor. The processor 1201 and the memory 1202 are electrically connected. Those skilled in the art will understand that the computer device structure shown in the figure does not constitute a limitation on the computer device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0110] The processor 1201 is the control center of the computer device 1200. It connects various parts of the computer device 1200 via various interfaces and lines. By running or loading software programs and / or units stored in the memory 1202, and by calling data stored in the memory 1202, it executes various functions of the computer device 1200 and processes data, thereby providing overall monitoring of the computer device 1200. The processor 1201 can be a central processing unit (CPU), a graphics processing unit (GPU), a network processor (NP), etc., and can implement or execute the methods, steps, and logic diagrams disclosed in the embodiments of this application.

[0111] In this embodiment, the processor 1201 in the computer device 1200 loads the instructions corresponding to the processes of one or more application programs into the memory 1202 according to the following steps, and the processor 1201 runs the application programs stored in the memory 1202 to realize various functions. For example, during the explosion-proof valve test, the processor obtains the gas generation and pressure relief area and the gas expansion and pressure relief area required before the explosion-proof valve of the battery pack under test is ruptured; and verifies the pressure relief area of ​​the explosion-proof valve based on the gas generation and pressure relief area and the gas expansion and pressure relief area. Specific implementations of the above operations can be found in the preceding embodiments and will not be repeated here.

[0112] Optionally, such as Figure 4 As shown, the computer device 1200 also includes: a touch screen display 1203, a radio frequency circuit 1204, an audio circuit 1205, an input unit 1206, and a power supply 1207. The processor 1201 is electrically connected to the touch screen display 1203, the radio frequency circuit 1204, the audio circuit 1205, the input unit 1206, and the power supply 1207. Those skilled in the art will understand that... Figure 4 The computer device structure shown does not constitute a limitation on the computer device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0113] The touch display screen 1203 can be used to display a graphical user interface (GUI) and receive operation commands generated by the user interacting with the GUI. The touch display screen 1203 may include a display panel and a touch panel. The display panel can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of the computer device. These graphical user interfaces can be composed of graphics, text, icons, video, and any combination thereof. Optionally, the display panel can be configured using a liquid crystal display (LCD), organic light-emitting diode (OLED), or similar technology. The touch panel can be used to collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near the touch panel), generate corresponding operation commands, and execute the corresponding program according to the operation commands. Optionally, the touch panel may include two parts: a touch detection device and a touch controller. The touch detection device detects the user's touch location and the signal generated by the touch operation, transmitting the signal to the touch controller. The touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends it to the processor 1201. It can also receive and execute commands from the processor 1201. The touch panel can cover the display panel. When the touch panel detects a touch operation on or near it, it transmits the information to the processor 1201 to determine the type of touch event. Subsequently, the processor 1201 provides corresponding visual output on the display panel based on the type of touch event. In this embodiment, the touch panel and the display panel can be integrated into the touch display screen 1203 to achieve input and output functions. However, in some embodiments, the touch panel and the touch display screen 1203 can be implemented as two independent components to achieve input and output functions. That is, the touch display screen 1203 can also be used as part of the input unit 1206 to achieve input functions.

[0114] The radio frequency circuit 1204 can be used to transmit and receive radio frequency signals to establish wireless communication with network devices or other computer devices, and to transmit and receive signals with network devices or other computer devices.

[0115] Audio circuit 1205 can be used to provide an audio interface between a user and a computer device via a speaker and a microphone. Audio circuit 1205 can convert received audio data into electrical signals and transmit them to the speaker, where the speaker converts them into sound signals for output. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by audio circuit 1205, converted back into audio data, and then processed by processor 1201 before being transmitted via radio frequency circuit 1204 to, for example, another computer device, or output to memory 1202 for further processing. Audio circuit 1205 may also include an earphone jack to provide communication between peripheral headphones and the computer device.

[0116] The input unit 1206 can be used to receive input numbers, characters, or user characteristic information (such as fingerprints, iris, facial information, etc.), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control.

[0117] Power supply 1207 is used to supply power to various components of computer device 1200. Optionally, power supply 1207 can be logically connected to processor 1201 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. Power supply 1207 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0118] although Figure 4 As not shown in the diagram, computer equipment 1200 may also include a camera, sensor, wireless fidelity module, Bluetooth module, etc., which will not be described in detail here.

[0119] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0120] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0121] Therefore, embodiments of this application provide a computer-readable storage medium storing multiple computer programs that can be loaded by a processor to execute any of the explosion-proof valve pressure relief area verification methods provided in this application. The computer program can execute the following steps of the explosion-proof valve pressure relief area verification method: during the explosion-proof valve test, obtaining the required gas generation pressure relief area and gas expansion pressure relief area of ​​the explosion-proof valve of the battery pack under test before explosion; verifying the pressure relief area of ​​the explosion-proof valve based on the gas generation pressure relief area and the gas expansion pressure relief area. Specific implementations of the above operations can be found in the preceding embodiments and will not be repeated here.

[0122] The computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0123] Since the computer program stored in the computer-readable storage medium can execute any of the explosion-proof valve pressure relief area verification methods provided in the embodiments of this application, the beneficial effects that any of the explosion-proof valve pressure relief area verification methods provided in the embodiments of this application can achieve can be realized, as detailed in the preceding embodiments, and will not be repeated here.

[0124] According to one aspect of this application, a computer program product or computer program is also provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the methods provided in the various optional implementations of the above embodiments.

[0125] In the above embodiments of the explosion-proof valve pressure relief area verification device, computer-readable storage medium, computer equipment, and computer program product, the descriptions of each embodiment have different focuses. For parts not described in detail in a particular embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process and beneficial effects of the explosion-proof valve pressure relief area verification device, computer-readable storage medium, computer program product, computer equipment, and their corresponding units described above can be referred to the description of the explosion-proof valve pressure relief area verification method in the above embodiments, and will not be repeated here.

[0126] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0127] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for verifying the pressure relief area of ​​an explosion-proof valve, characterized in that, The method includes: During the explosion-proof valve test, the required gas generation and pressure relief area and gas expansion and pressure relief area of ​​the explosion-proof valve of the battery pack under test are obtained before the explosion-proof valve bursts. The pressure relief area of ​​the explosion-proof valve is verified based on the gas generation pressure relief area and the gas expansion pressure relief area. Among them, the gas generation rate of the battery pack under test during the explosion-proof valve test is obtained; Obtain the through area and air permeability of the explosion-proof valve of the battery pack under test; The required gas release area S of the explosion-proof valve of the battery pack under test before explosion is calculated using the following formula: S=(V Q ×S1) / V T ; Where S is the gas production and pressure relief area, V Q S1 represents the gas production rate after a single battery cell fails, S1 represents the straight-through area of ​​the explosion-proof valve, and V represents the gas production rate after a single battery cell fails. T The air permeability of the explosion-proof valve; Obtain the gas expansion rate of the battery pack under test after temperature change during the explosion-proof valve test; The required gas expansion and depressurization area S2 of the explosion-proof valve of the battery pack under test before explosion is calculated using the following formula: S2=(V3×S1) / V T ; Wherein, S2 is the gas expansion and pressure relief area, V3 is the gas expansion rate after temperature change, S1 is the straight-through area value of the explosion-proof valve, and V T The air permeability of the explosion-proof valve; The sum of the areas of the gas generation pressure relief area and the gas expansion pressure relief area is determined using the following formula: S3 = S + S2; Wherein, S3 is the sum of the areas of the gas-generating pressure relief area and the gas expansion pressure relief area, S is the gas-generating pressure relief area, and S2 is the gas expansion pressure relief area; The pressure relief area of ​​the explosion-proof valve is checked based on the area and value.

2. The method for verifying the pressure relief area of ​​an explosion-proof valve according to claim 1, characterized in that, The step of verifying the pressure relief area of ​​the explosion-proof valve based on the area and value includes: The area and value are optimized based on a preset safety factor to obtain the optimized target area value; The pressure relief area of ​​the explosion-proof valve is checked based on the target area value.

3. The method for verifying the pressure relief area of ​​an explosion-proof valve according to claim 2, characterized in that, The step of verifying the pressure relief area of ​​the explosion-proof valve based on the target area value includes: Obtain the through area value of the explosion-proof valve; The pressure relief area of ​​the explosion-proof valve is verified based on the comparison result between the target area value and the through area value.

4. The method for verifying the pressure relief area of ​​an explosion-proof valve according to claim 3, characterized in that, The step of verifying the pressure relief area of ​​the explosion-proof valve based on the comparison result between the target area value and the through area value includes: If the comparison result shows that the target area value is greater than the straight-through area value, then the pressure relief area verification of the explosion-proof valve is determined to be unsuccessful. If the comparison result shows that the target area value is less than or equal to the through area value, then the pressure relief area verification of the explosion-proof valve is determined to be passed.

5. The method for verifying the pressure relief area of ​​an explosion-proof valve according to claim 1, characterized in that, The process of obtaining the gas expansion rate of the battery pack under test after temperature change during the explosion-proof valve test includes: Obtain the volume value of the battery pack under test; Obtain the temperature difference value of the battery pack under test within a preset time period; Based on the volume value, temperature difference value, and duration value corresponding to the preset time period, the gas expansion rate of the battery pack under test after temperature change during the explosion-proof valve test is determined.

6. A computer device, characterized in that, The computer device includes: One or more processors; Memory; and One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the explosion-proof valve pressure relief area verification method according to any one of claims 1 to 5.

7. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps in the explosion-proof valve pressure relief area verification method according to any one of claims 1 to 5.

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