Battery arc testing device and battery arc testing method

Abstract

The invention relates to a battery arc testing device and a battery arc testing method. The device comprises a closed container, a positive electrode plate, a negative electrode plate, an environment module, a testing circuit and a processor, the positive electrode plate, the negative electrode plate and the environment module are arranged in the closed container, the first side of the positive electrode plate and the first side of the negative electrode plate are arranged in the environment module, the second side of the positive electrode plate and the second side of the negative electrode plate penetrate through the closed container through wires and are connected with the test circuit, and the test circuit is further connected with the processor. The processor is used for controlling the test circuit to generate different test signals under the condition that the closed container is filled with the environmental gas, and acquiring arc signals generated by the positive electrode plate and the negative electrode plate under the different test signals. The electrolyte or the battery active material powder is filled in the environment module to simulate the electrolyte environment in the battery, and the environment gas is filled in the closed container to simulate the external environment after the electric arc is generated, so that the test accuracy can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery testing, and in particular to a battery arc testing device and a battery arc testing method. Background Art

[0002] As the battery market continues to expand, batteries are widely used in various electronic devices, such as smartphones, laptops, electric vehicles, etc. However, battery safety issues are the focus of consumers' attention, as the proportion of fires caused by fault arcs in battery systems is as high as 60%. Therefore, the study of arcs is of vital importance. In order to deeply study the formation mechanism, characteristics and effects of arcs on materials and systems, researchers have developed a variety of arc generation devices.

[0003] However, the arc generating devices described in the related records have the problem of inaccurate testing when performing arc testing. Summary of the invention

[0004] Based on this, it is necessary to provide a battery arc testing device and a battery arc testing method that can improve the test accuracy in order to solve the above technical problems.

[0005] In a first aspect, the present application provides an arc testing device for a battery, the arc testing device comprising: a sealed container, a positive electrode sheet, a negative electrode sheet, an environmental module, a testing circuit, and a processor;

[0006] The positive electrode sheet, the negative electrode sheet and the environment module are placed in a sealed container, and the first side of the positive electrode sheet and the first side of the negative electrode sheet are arranged in the environment module, and the second side of the positive electrode sheet and the second side of the negative electrode sheet pass through the sealed container through a wire and are connected to a test circuit, and the test circuit is also connected to a processor;

[0007] The processor is used to control the test circuit to generate different test signals when the closed container is filled with ambient gas, and obtain arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals.

[0008] In one embodiment, the arc test device further includes: a signal acquisition device; the signal acquisition device is connected to the processor and the test circuit respectively; the signal acquisition device is arranged outside the closed container;

[0009] The signal acquisition device is used to acquire arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals;

[0010] Correspondingly, the processor is used to control the test circuit to generate different test signals and obtain the arc signal from the signal acquisition device when the closed container is filled with ambient gas.

[0011] In one embodiment, the signal acquisition device includes: an image acquisition device and an electrical signal acquisition device; the image acquisition device is connected to the processor, and the electrical signal acquisition device is respectively connected to the processor and the test circuit;

[0012] The image acquisition device is used to acquire arc images of arc signals generated by the positive electrode sheet and the negative electrode sheet;

[0013] The signal acquisition device is used to collect arc signals generated by the positive electrode sheet and the negative electrode sheet.

[0014] In one embodiment, the electrical signal acquisition device includes: a voltage acquisition device and a current acquisition device; the voltage acquisition device is connected in parallel with the test circuit, the current acquisition device is connected in series with the test circuit, and the voltage acquisition device and the current acquisition device are also connected to a processor.

[0015] In one embodiment, the image acquisition device comprises a high-speed image acquisition device, and the voltage acquisition device and the current acquisition device comprise high-speed data acquisition devices.

[0016] In one embodiment, the test circuit includes: a voltage regulator and an electronic load;

[0017] The processor is used for regulating the voltage regulator and the electronic load to generate different test signals.

[0018] In one embodiment, the processor is used to adjust the voltage value of the voltage-stabilizing source to a preset voltage value; the preset voltage value is not lower than the critical voltage value of the arc signal generated by the positive electrode sheet and the negative electrode sheet.

[0019] In one embodiment, a first side of the positive electrode sheet and a first side of the negative electrode sheet are spaced apart by a predetermined distance.

[0020] In one of the embodiments, the environmental module is filled with electrolyte and / or battery active material powder; the electrolyte includes electrolyte when the battery is in a normal state and electrolyte when the battery is in a faulty state; the battery active material powder includes battery active material powder when the battery is in a normal state and battery active material powder when the battery is in a faulty state.

[0021] In a second aspect, the present application further provides a battery arc testing method, the method is applied to any processor in the first aspect, the method comprising:

[0022] When the sealed container is filled with ambient gas, the test circuit is controlled to generate different test signals;

[0023] Obtain arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals;

[0024] The arc signal is processed and analyzed to obtain the processing result.

[0025] In a third aspect, the present application further provides a battery arc testing device, the device comprising:

[0026] A control module controls the test circuit to generate different test signals when the sealed container is filled with ambient gas;

[0027] An acquisition module is used to acquire arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals;

[0028] The processing module processes and analyzes the arc signal to obtain a processing result.

[0029] In a fourth aspect, the present application further provides a computer device, the computer device comprising a memory and a processor, the memory storing a computer program, and the processor implementing the following steps when executing the computer program:

[0030] When the sealed container is filled with ambient gas, the test circuit is controlled to generate different test signals;

[0031] Obtain arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals;

[0032] The arc signal is processed and analyzed to obtain the processing result.

[0033] In a fifth aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0034] When the sealed container is filled with ambient gas, the test circuit is controlled to generate different test signals;

[0035] Obtain arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals;

[0036] The arc signal is processed and analyzed to obtain the processing result.

[0037] In a sixth aspect, the present application further provides a computer program product, the computer program product comprising a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0038] When the sealed container is filled with ambient gas, the test circuit is controlled to generate different test signals;

[0039] Obtain arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals;

[0040] The arc signal is processed and analyzed to obtain the processing result.

[0041] The arc test device and arc test method of the battery are described above. The arc test device comprises: a closed container, a positive electrode sheet, a negative electrode sheet, an environmental module, a test circuit and a processor; wherein the positive electrode sheet, the negative electrode sheet and the environmental module are placed in a closed container, and the first side of the positive electrode sheet and the first side of the negative electrode sheet are arranged in the environmental module, the second side of the positive electrode sheet and the second side of the negative electrode sheet pass through the closed container through a wire and are connected to the test circuit, and the test circuit is also connected to the processor; the processor is used to control the test circuit to generate different test signals when the closed container is filled with environmental gas, and obtain the arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals. By filling the environmental module with electrolyte or battery active material powder, the electrolyte environment inside the battery can be simulated, and by filling the closed container with environmental gas, the external environment after the arc occurs can be simulated. By simulating the electrolyte environment inside the battery and the external environment after the arc occurs, the real environment where the arc is located can be accurately simulated, so the arc signal measured by the arc test device is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural block diagram of an arc testing device for a battery in one embodiment;

[0043] Figure 2 is a schematic diagram of the physical structure of an environment module in one embodiment;

[0044] Figure 3 A top view of the structure of an environment module in one embodiment;

[0045] Figure 4 It is a structural block diagram of an arc testing device for a battery in another embodiment;

[0046] Figure 5 It is a structural block diagram of an arc testing device for a battery in another embodiment;

[0047] Figure 6 It is a structural block diagram of an arc testing device for a battery in another embodiment;

[0048] Figure 7 It is a structural block diagram of an arc testing device for a battery in another embodiment;

[0049] Figure 8 It is a structural block diagram of an arc testing device for a battery in another embodiment;

[0050] Fig. 9 FIG. 1 is a schematic diagram of an arc diagram of an arc signal in an embodiment;

[0051] Fig.10 A schematic diagram of an arc signal in another embodiment;

[0052] Fig.11 is a schematic flow chart of an arc testing method for a battery in another embodiment;

[0053] Fig.12 is a structural block diagram of an arc testing device for a battery in one embodiment;

[0054] Fig.13 is an internal structure diagram of a computer device in one embodiment;

[0055] Description of reference numerals:

[0056] Sealed container 10; positive electrode sheet 101; negative electrode sheet 102; environmental module 103; test circuit 20; processor 30; signal acquisition device 40; voltage acquisition device 4021; current acquisition device 4022; voltage stabilizing source 201; electronic load 202. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0058] As the battery market continues to expand, batteries are widely used in various electronic devices, such as smartphones, laptops, electric vehicles, etc. However, battery safety issues are the focus of consumer attention, as the proportion of fires caused by fault arcs in battery systems is as high as 60%. Therefore, the study of arcs is of vital importance. In order to deeply study the formation mechanism, characteristics of arcs and their impact on materials and systems, researchers have developed a variety of arc generating devices. However, the arc generating devices recorded in the relevant records have the problem of inaccurate testing when conducting arc tests.

[0059] In one embodiment, Figure 1 As shown, a battery arc test device is provided, the battery arc test device comprising: a sealed container 10, a positive electrode sheet 101, a negative electrode sheet 102, an environmental module 103, a test circuit 20 and a processor 30;

[0060] Among them, the positive electrode sheet, the negative electrode sheet and the environmental module are placed in a sealed container, and the first side of the positive electrode sheet and the first side of the negative electrode sheet are arranged in the environmental module, the second side of the positive electrode sheet and the second side of the negative electrode sheet pass through the sealed container through a wire and are connected to the test circuit, and the test circuit is also connected to the processor; the spacing distance between the first side of the positive electrode sheet and the first side of the negative electrode sheet is a preset distance L, for example, the preset distance is 4 cm.

[0061] The processor is used to control the test circuit to generate different test signals and obtain arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals when the sealed container is filled with ambient gas. The arc signal includes arc images and electrical signals. The arc image is the image and sound when the positive electrode sheet and the negative electrode sheet have arc phenomena, and the electrical signal is the voltage signal and current signal when the positive electrode sheet and the negative electrode sheet have arc phenomena.

[0062] The above-mentioned positive electrode sheet is the anode where the arc occurs. The shape of the positive electrode sheet can be rectangular, circular, strip, mesh, regular pattern, irregular pattern, plane pattern, three-dimensional pattern or bending pattern, etc. It can also be other shapes. The specific shape of the positive electrode sheet can be determined according to the actual test requirements, and this embodiment does not limit it. The material of the positive electrode sheet can be a conductive material such as metal material, graphite material, conductive polymer, nanomaterial or ceramic. The material of the positive electrode sheet can be determined according to the actual test requirements, and this embodiment does not limit it. The length, width and thickness of the positive electrode sheet can be determined according to the test requirements. This embodiment does not limit it. For example, the length of the positive electrode sheet can be 8cm, the width can be 4cm and the thickness can be 1mm. The above-mentioned negative electrode sheet is the cathode where the arc occurs. The shape of the negative electrode sheet can be rectangular, circular, strip, mesh, regular pattern, irregular pattern, plane pattern, three-dimensional pattern or bending pattern, etc. It can also be other shapes. The specific shape of the negative electrode sheet can be determined according to the actual test requirements, and this embodiment does not limit it. The material of the negative electrode sheet can be a conductive material such as metal material, graphite material, conductive polymer, nanomaterial or ceramic. The material of the negative electrode sheet can be determined according to the actual test requirements, and this embodiment does not limit it. The length, width and thickness of the negative electrode sheet can be determined according to the test requirements and this embodiment does not limit it. For example, the length of the negative electrode sheet can be 8 cm, the width can be 4 cm and the thickness can be 1 mm. The above-mentioned positive electrode sheet and negative electrode sheet are both conductive materials, and the material of the positive electrode sheet and the material of the negative electrode sheet can be the same or different. The shape of the positive electrode sheet and the shape of the negative electrode sheet can be the same or different. The first side of the positive electrode sheet and the first side of the negative electrode sheet are the side close to the environmental module, and the second side of the positive electrode sheet and the second side of the negative electrode sheet are the side away from the environmental module.

[0063] The above-mentioned environmental module is filled with electrolyte or battery active material powder, the electrolyte includes electrolyte when the battery is in a normal state and electrolyte when the battery is in a faulty state; the battery active material powder includes battery active material powder when the battery is in a normal state and battery active material powder when the battery is in a faulty state. The material of the environmental module is insulating material, specifically mica material. The shape of the environmental module can be a container that can discharge electrolyte or battery active material powder, such as a groove shape, a bowl shape, a disk shape or a barrel shape. For example, Figure 2As shown, the environment module can be a base of a special shape composed of two opposing inclined surfaces, and its top view is as shown in Figure 3 As shown, a groove is designed between the two inclined surfaces as an environmental module, into which electrolyte can be dripped or battery active material powder can be added. Insulating glue is used to seal the grooves on both sides to prevent the electrolyte / battery active material from flowing out during the experiment and affecting the experimental effect. The above-mentioned electrolyte includes a solute and a solvent, the solute is lithium hexafluorophosphate, and the solvent is a mixture of ethylene hexacarbonate and ethyl methyl carbonate. The ratio of ethylene hexacarbonate to ethyl methyl carbonate can be three to seven. The battery active material powder includes at least one of graphite, silicon-carbon powder, lithium iron phosphate powder, and ternary lithium active material mixture powder in different charge states. The above-mentioned environmental gas includes any one of air, nitrogen, carbon dioxide and inert gas, and the environmental gas includes the environmental gas when the battery is in a normal state and the environmental gas when the battery is in an abnormal state.

[0064] The material of the sealed container is transparent acrylic material or transparent glass material. The shape of the sealed container can be a cube, a cylinder, a sphere, etc., and can also be a glove box. The sealed container is provided with an opening, and the wire can pass through the sealed container. In order to ensure that the sealed container can still maintain the airtightness of the box under the condition of opening the hole and passing the wire, the opening can be threaded, the wire can be fixed with bolts and nuts, and the gap through the wire can be sealed with insulating glue.

[0065] In the embodiment of the present application, an arc test device can be pre-built, and the specific construction process is: first, the positive electrode sheet is used as the anode for arc generation, and the negative electrode sheet is used as the cathode for arc generation, and then the first side of the positive electrode sheet and the first side of the negative electrode sheet are fixed inside the environmental module, and then the spacing distance between the first side of the positive electrode sheet and the first side of the negative electrode sheet is adjusted. After adjusting the spacing distance between the first side of the positive electrode sheet and the first side of the negative electrode sheet to the preset distance, the adjusted positive electrode sheet, the negative electrode sheet and the environmental module are placed in a sealed container, and the second side of the positive electrode sheet and the second side of the negative electrode sheet are connected to the wire, and connected to the test circuit through the sealed joint of the sealed container. After the arc test device is built, the test environment can be simulated. Specifically, an electrolyte can be added to the environmental module to simulate the electrolyte environment inside the battery, and / or a battery active material powder can be added to the environmental module to simulate the active material environment inside the battery. After the electrolyte and / or the battery active material powder are filled in the environmental module, the environmental gas can be filled in the sealed container to simulate the external environment after the arc occurs. After setting up the arc test device and the simulated test environment, the arc test process of the battery can be started. Specifically, the processor can control the test circuit to generate different test signals and obtain the arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals.

[0066] The arc testing device for a battery provided in an embodiment of the present application can simulate the electrolyte environment inside the battery by filling an electrolyte or battery active material powder in an environmental module, and can simulate the external environment after an arc occurs by filling an ambient gas in a sealed container. By simulating the electrolyte environment inside the battery and the external environment after an arc occurs, the real environment in which the arc is located can be accurately simulated, so the arc signal measured by using the arc testing device is more accurate.

[0067] In one embodiment, Figure 4 As shown, the arc testing device further includes: a signal acquisition device 40 .

[0068] The signal acquisition device is connected to the processor and the test circuit respectively; the signal acquisition device is arranged outside the sealed container;

[0069] The above-mentioned signal acquisition device is used to collect arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals; correspondingly, the processor is used to control the test circuit to generate different test signals when the closed container is filled with ambient gas, and obtain the arc signal from the signal acquisition device.

[0070] The signal acquisition device includes an image acquisition device 401 and an electrical signal acquisition device 402; the image acquisition device is connected to the processor, and the electrical signal acquisition device is connected to the processor and the test circuit respectively.

[0071] The image acquisition device is used to acquire arc images of arc signals generated by the positive electrode sheet and the negative electrode sheet; the signal acquisition device is used to acquire arc signals generated by the positive electrode sheet and the negative electrode sheet.

[0072] The image acquisition device may be a camera. The electrical signal acquisition device 402 includes a voltage acquisition device 4021 and a current acquisition device 4022, wherein the voltage acquisition device is connected in parallel with the test circuit, and the current acquisition device is connected in series with the test circuit. The voltage acquisition device is used to acquire the voltage signal generated by the positive electrode sheet and the negative electrode sheet, and the current acquisition device is used to acquire the current signal generated by the positive electrode sheet and the negative electrode sheet. The image acquisition device includes a high-speed image acquisition device, and the voltage acquisition device and the current acquisition device include a high-speed data acquisition device.

[0073] In an embodiment of the present application, an image acquisition device can be installed on the outside of the sealed container, a voltage acquisition device can be connected in parallel with the test circuit, and a current acquisition device can be connected in series with the test circuit. After setting up the arc test device, simulating the test environment, and connecting the test circuit, the processor can control the test circuit to generate different test signals, and the image acquisition device can collect arc images of arc signals generated by the positive electrode sheet and the negative electrode sheet, as well as collect electrical signals corresponding to the arc signals generated by the positive electrode sheet and the negative electrode sheet, and then send the arc images and electrical signals to the processor, and the processor can obtain the arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals. Optionally, after the image acquisition device collects the arc images and electrical signals, the arc images and electrical signals can be saved in the local memory, and then the processor can actively obtain the arc images and electrical signals from the local memory of the image acquisition device, and the processor can obtain the arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals.

[0074] In one embodiment, Figure 4 As shown, the test circuit includes: a voltage regulator 201 and an electronic load 202 .

[0075] The processor is used to adjust the voltage regulator and the electronic load to generate different test signals. The value of the electronic load can be determined by the internal resistance and capacitance of the battery.

[0076] The above-mentioned processor is used to adjust the voltage value of the voltage stabilizing source to a preset voltage value. Among them, the preset voltage value is not lower than the critical voltage value of the arc signal generated by the positive electrode sheet and the negative electrode sheet, that is, the preset voltage value can be greater than the critical voltage value of the arc signal generated by the positive electrode sheet and the negative electrode sheet, and the preset voltage value can also be equal to the critical voltage value of the arc signal generated by the positive electrode sheet and the negative electrode sheet. Specifically, within the preset time after the arc signal is generated by the positive electrode sheet and the negative electrode sheet, if there is still an arc signal or the arc signal is stable, it means that the arc signal has reached a steady state, then the critical voltage value of the arc signal can be used as the preset voltage value.

[0077] In an embodiment of the present application, after setting up the arc test device, simulating the test environment, and connecting the test circuit, the processor can fix the value of the voltage stabilizer and dynamically adjust the value of the electronic load to generate different test signals. Optionally, the processor can fix the value of the voltage stabilizer and dynamically adjust the value of the electronic load to generate different test signals. Optionally, the processor can fix the value of the electronic load and dynamically adjust the value of the voltage stabilizer to generate different test signals. Optionally, the processor can comprehensively dynamically adjust the value of the voltage stabilizer and adjust the value of the electronic load to generate different test signals.

[0078] In one embodiment, Figure 4As shown, a battery arc test device is also provided, the battery arc test device comprises: a sealed container, a positive electrode sheet, a negative electrode sheet, an environmental module, a voltage stabilizing source, an electronic load, an image acquisition device, a voltage acquisition device (such as a high-speed digital acquisition voltmeter), a current acquisition device (such as a high-speed digital acquisition ammeter) and a processor;

[0079] Among them, the positive electrode sheet, the negative electrode sheet and the environmental module are placed in a sealed container, and the first side of the positive electrode sheet and the first side of the negative electrode sheet are arranged in the environmental module, the second side of the positive electrode sheet and the second side of the negative electrode sheet pass through the sealed container through a wire, and are connected to a test circuit composed of a voltage stabilizing source and an electronic load, the voltage acquisition device is connected in parallel with the test circuit composed of the voltage stabilizing source and the electronic load, the current acquisition device is connected in series with the test circuit composed of the voltage stabilizing source and the electronic load, the image acquisition device is arranged outside the sealed container, and the processor is respectively connected to the voltage stabilizing source, the electronic load, the image acquisition device, the voltage acquisition device and the current acquisition device.

[0080] The environment module is filled with electrolyte or battery active material powder. The electrolyte includes a solute and a solvent, the solute is lithium hexafluorophosphate, and the solvent is a mixture of ethylene hexacarbonate and ethyl methyl carbonate. The battery active material powder includes at least one of graphite, silicon carbon powder, lithium iron phosphate powder, and ternary lithium active material powder. The environmental gas includes any one of air, nitrogen, carbon dioxide and inert gas. The material of the sealed container is a transparent acrylic material or a transparent glass material.

[0081] The processor is used to adjust the voltage regulator and the electronic load to generate different test signals when the sealed container is filled with ambient gas, and to obtain arc images from the image acquisition device, voltage signals from the voltage acquisition device, and current signals from the current acquisition device. The image acquisition device is used to acquire arc images of arc signals generated by the positive electrode sheet and the negative electrode sheet, the voltage acquisition device is used to acquire voltage signals generated by the positive electrode sheet and the negative electrode sheet, and the current acquisition device is used to acquire current signals generated by the positive electrode sheet and the negative electrode sheet.

[0082] The above-mentioned image acquisition device is used to acquire arc images of arc signals generated by the positive electrode sheet and the negative electrode sheet, the voltage acquisition device is used to acquire voltage signals generated by the positive electrode sheet and the negative electrode sheet, and the current acquisition device is used to acquire current signals generated by the positive electrode sheet and the negative electrode sheet.

[0083] In the embodiment of the present application, the arc test process of the battery using the arc test device of the battery is as follows:

[0084] 1. Arc test device construction

[0085] Using mica and other insulating materials, a special shaped base consisting of two opposing inclined surfaces is designed. The actual picture and the top view are shown in the figure below. Figure 2 and Figure 3 As shown. A groove is designed between the two inclined surfaces for dripping electrolyte or adding battery active material powder. Insulating glue is used to seal the groove on both sides to prevent the electrolyte / battery active material from flowing out during the experiment and affecting the experimental results.

[0086] When installing this arc test device, first seal both sides of the groove with insulating glue. After the insulating glue solidifies, select metal sheets of target size (for example: length 8cm, width 4cm, thickness 1mm) as electrodes, and place the two metal sheet electrodes along the slope. Therefore, the mica base with different groove gaps can meet the requirements of conducting experiments with different electrode gaps. Use a clamp to fix the two electrodes on the slope to ensure that the gap between the electrodes remains unchanged during the experiment. The actual picture and the top view are shown in the figure. Figure 5 and Figure 6 As shown. Connect the positive and negative electrodes of the power supply to the two electrodes through wires with alligator clips. The top view is as shown Figure 7 shown.

[0087] Place the arc test device in a transparent container, such as a sealed acrylic glove box / glass glove box. Open a hole in the transparent container so that the wire can pass through the transparent container to connect the arc test device and the power supply. At the same time, it is necessary to ensure that the box can still be sealed when the hole is opened and the wire passes through. For example, tap the hole, use bolts and nuts to fix the wire, and use insulating glue to seal the gap where the wire passes through. Figure 8 At the same time, a camera, a voltage measuring device, a current measuring device, etc. are installed outside the transparent container to collect arc sound, image, current, and voltage signals.

[0088] 2. Arc Occurrence Environment Simulation

[0089] (1) Simulate the arc-generating medium in the battery: Figure 8 An electrolyte (such as a common electrolyte, lithium hexafluorophosphate as the lithium salt solute, and a solvent selected as a mixture of ethylene carbonate and EMC (ethyl methyl carbonate) in a ratio of three to seven) is dripped into the groove, and the electrolyte can immerse the front ends of the two electrode sheets; or battery material powder (such as a mixture of graphite, silicon carbon, lithium iron phosphate, and ternary lithium active materials in different charge states) is added to the groove.

[0090] (2) Simulate the external environment after the arc occurs: Figure 8The sealed container shown is filled with ambient gases such as air, nitrogen, carbon dioxide or inert gas to simulate the external environment after the arc occurs. For example, when it is necessary to simulate a nitrogen environment, the nitrogen bottle is smoothly introduced into the glove box through the original air inlet valve of the glove box, and the original gas in the glove box is discharged through the exhaust valve. When the original gas in the glove box is drained and filled with nitrogen, the simulation of the nitrogen environment is achieved.

[0091] 3. Record arc phenomena under different environments

[0092] Preset the electronic load resistance and the voltage value of the regulated power supply, turn on the high-speed data acquisition and the camera to record. Connect the circuit to generate an arc phenomenon. After the arc phenomenon ends, disconnect the power supply, turn off the high-speed data acquisition and the camera, and the experiment ends. The typical arc pictures recorded are as follows: Fig. 9 As shown and the current voltage as Fig.10 shown.

[0093] The arc testing device for a battery provided in an embodiment of the present application can simulate the electrolyte environment inside the battery by filling an electrolyte or battery active material powder in an environmental module, and can simulate the external environment after an arc occurs by filling an ambient gas in a sealed container. By simulating the electrolyte environment inside the battery and the external environment after an arc occurs, the real environment in which the arc is located can be accurately simulated, so the arc signal measured by using the arc testing device is more accurate.

[0094] In one embodiment, a battery arc testing method is also provided. Fig.11 As shown, the method includes:

[0095] S501, when the sealed container is filled with ambient gas, controlling the test circuit to generate different test signals.

[0096] S502, obtaining arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals.

[0097] S503, processing and analyzing the arc signal to obtain a processing result.

[0098] The methods described in the above steps are all described in the above embodiments. Please refer to the above description for details and will not be repeated here.

[0099] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0100] Based on the same inventive concept, the embodiment of the present application also provides a battery arc test device for implementing the battery arc test method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of one or more battery arc test devices provided below can refer to the limitations of the battery arc test method above, and will not be repeated here.

[0101] In one embodiment, Fig.12 As shown, a battery arc testing device is provided, comprising:

[0102] The control module 11 controls the test circuit to generate different test signals when the sealed container is filled with ambient gas.

[0103] The acquisition module 12 acquires arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals.

[0104] The processing module 13 processes and analyzes the arc signal to obtain a processing result.

[0105] Each module in the above-mentioned battery arc test device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0106] In one embodiment, a computer device is provided. The computer device may be a terminal or a server. The internal structure diagram thereof may be as follows: Fig.13As shown, the computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. 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 and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a battery arc test method is implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0107] Those skilled in the art will understand that Fig.13 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0108] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0109] When the sealed container is filled with ambient gas, the test circuit is controlled to generate different test signals;

[0110] Obtain arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals;

[0111] The arc signal is processed and analyzed to obtain the processing result.

[0112] The above embodiment provides a computer device, whose implementation principle and technical effect are similar to those of the above method embodiment, and will not be repeated here.

[0113] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0114] When the sealed container is filled with ambient gas, the test circuit is controlled to generate different test signals;

[0115] Obtain arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals;

[0116] The arc signal is processed and analyzed to obtain the processing result.

[0117] The above embodiment provides a computer-readable storage medium, whose implementation principle and technical effect are similar to those of the above method embodiment, and will not be repeated here.

[0118] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0119] When the sealed container is filled with ambient gas, the test circuit is controlled to generate different test signals;

[0120] Obtain arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals;

[0121] The arc signal is processed and analyzed to obtain the processing result.

[0122] The above embodiment provides a computer program product, whose implementation principle and technical effect are similar to those of the above method embodiment, and will not be repeated here.

[0123] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0124] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0125] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A battery arc testing device, characterized in that: The arc testing device comprises: a sealed container, a positive electrode sheet, a negative electrode sheet, an environmental module, a testing circuit and a processor; The positive electrode sheet, the negative electrode sheet and the environmental module are placed in the sealed container, and the first side of the positive electrode sheet and the first side of the negative electrode sheet are arranged in the environmental module, and the second side of the positive electrode sheet and the second side of the negative electrode sheet pass through the sealed container through a wire and are connected to the test circuit, and the test circuit is also connected to the processor; The processor is used to control the test circuit to generate different test signals when the sealed container is filled with ambient gas, and to obtain arc signals generated by the positive electrode sheet and the negative electrode sheet under the different test signals.

2. The device according to claim 1, characterized in that The arc testing device further comprises: a signal acquisition device; the signal acquisition device is respectively connected to the processor and the test circuit; the signal acquisition device is arranged outside the sealed container; The signal acquisition device is used to acquire arc signals generated by the positive electrode sheet and the negative electrode sheet under the different test signals; Correspondingly, the processor is used to control the test circuit to generate different test signals and obtain the arc signal from the signal acquisition device when the closed container is filled with ambient gas.

3. The device according to claim 2, characterized in that The signal acquisition device comprises: an image acquisition device and an electrical signal acquisition device; the image acquisition device is connected to the processor, and the electrical signal acquisition device is respectively connected to the processor and the test circuit; The image acquisition device is used to acquire arc images of the arc signals generated by the positive electrode sheet and the negative electrode sheet; The signal acquisition device is used to acquire arc signals generated by the positive electrode sheet and the negative electrode sheet.

4. The device according to claim 3, characterized in that The electrical signal acquisition device includes: a voltage acquisition device and a current acquisition device; the voltage acquisition device is connected in parallel with the test circuit, the current acquisition device is connected in series with the test circuit, and the voltage acquisition device and the current acquisition device are also connected to the processor.

5. The device according to claim 4, characterized in that The image acquisition device comprises a high-speed image acquisition device, and the voltage acquisition device and the current acquisition device comprise high-speed data acquisition devices.

6. The device according to claim 1, characterized in that The test circuit comprises: a voltage stabilizing source and an electronic load; The processor is used to adjust the voltage stabilizing source and the electronic load to generate different test signals.

7. The device according to claim 6, characterized in that The processor is used to adjust the voltage value of the voltage-stabilizing source to a preset voltage value; the preset voltage value is not lower than the critical voltage value of the arc signal generated by the positive electrode sheet and the negative electrode sheet.

8. The device according to any one of claims 1 to 7, characterized in that The first side of the positive electrode sheet and the first side of the negative electrode sheet are spaced apart by a preset distance.

9. The device according to any one of claims 1 to 7, characterized in that: The environmental module is filled with electrolyte and / or battery active material powder; the electrolyte includes the electrolyte when the battery is in a normal state and the electrolyte when the battery is in a faulty state; the battery active material powder includes the battery active material powder when the battery is in a normal state and the battery active material powder when the battery is in a faulty state.

10. A battery arc testing method, characterized in that: The method is applied to the processor according to any one of claims 1 to 9, and the method comprises: When the sealed container is filled with ambient gas, the test circuit is controlled to generate different test signals; Obtain arc signals generated by the positive electrode sheet and the negative electrode sheet under different test signals; The arc signal is processed and analyzed to obtain a processing result.

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