Test method, test device, electronic device, and storage medium for battery device

Abstract

The embodiment of the application provides a kind of battery device test method, device, electronic equipment and storage medium, belong to battery safety technical field.The method comprises: control scanning component scans battery device in test device, obtains the radiographic image of battery device;According to the position distribution of battery monomer in radiographic image, the test point position is positioned;Control test component in test device moves to test point position, to carry out needle test to battery device.The above technical scheme, by controlling scanning component to scan battery device, obtains the radiographic image of battery device, so as to position the test point position needed to be tested according to the position distribution of battery monomer, and then control test component moves to test point position, realize test automation, reduce the error problem caused by manual measurement, make the positioning of test point position more reliable, improve the accuracy of battery device test.

Description

Technical Field

[0001] This application relates to the field of battery safety technology, and more specifically, to a testing method, testing apparatus, electronic device, and storage medium for a battery device. Background Technology

[0002] In recent years, the new energy vehicle industry has developed rapidly. As a core component of new energy, power batteries are subjected to complex working conditions in market applications. Therefore, the demand for nail penetration testing, which can simulate extreme conditions in the market and rigorously test the safety performance of battery packs, is increasing.

[0003] Since the distribution of individual battery cells cannot be seen after the battery pack is assembled, the relevant technology requires testers to assess the distance between the target position and the edge of the battery pack based on the dimensions of the battery pack design model during the nail penetration test. The battery pack is then flipped or raised, and the opening and nail penetration points are determined by manual measurement. This method may result in a large error in the nail penetration position, causing a large test deviation. Summary of the Invention

[0004] This application provides a testing method, testing apparatus, electronic device, and storage medium for battery devices to improve the accuracy of battery device testing.

[0005] In a first aspect, embodiments of this application provide a method for testing a battery device, including:

[0006] The scanning component is controlled to scan the battery device in the test apparatus to obtain a radiographic image of the battery device;

[0007] The test points are located based on the positional distribution of the individual battery cells within the battery device in the radiographic image.

[0008] The test components in the test device are controlled to move to the test point to perform a nail penetration test on the battery device.

[0009] In the above technical solution, the battery device is scanned by the scanning component to obtain a radiographic image of the battery device. The radiographic image can be used to determine the positional distribution of the individual battery cells inside the battery device. Based on the positional distribution of the individual battery cells, the test points that need to be tested can be located. Then, the test component is controlled to move to the test point, realizing the automation of the test. This reduces the large errors caused by manual measurement, makes the location of the test points more reliable, and improves the accuracy of the battery device test.

[0010] In some embodiments, before locating test points based on the positional distribution of individual battery cells within the battery device in the radiographic image, the method includes:

[0011] The magnification ratio of the radiographic image relative to the battery device is calculated based on the relative distance between the scanning component and the battery device.

[0012] The radiographic image is adjusted to the same size as the battery device according to the magnification ratio.

[0013] In the above technical solution, by calculating the magnification ratio of the radiographic image relative to the battery device and adjusting the image size to match the actual size of the battery device, the position of the battery cell in the radiographic image can be mapped to the actual size, which facilitates the determination of test points for the actual distribution of battery cells in the battery device and improves the accuracy of test point determination.

[0014] In some embodiments, locating test points based on the positional distribution of individual battery cells within the battery device in the radiographic image includes:

[0015] In response to a selection operation triggered by a user on the radiographic image, the target battery cell corresponding to the selection operation is obtained;

[0016] The preset position on the target battery cell is determined as the test point.

[0017] In the above technical solution, since the radiographic image includes the location distribution of battery cells within the battery device, the user can intuitively select the target battery cell to be tested from the radiographic image according to the test requirements, and then determine the preset position on the target battery cell as the test point. This not only reduces the error of human measurement, but also improves the efficiency and accuracy of the test.

[0018] In some embodiments, controlling the test component in the test apparatus to move to the test point to perform a nail penetration test on the battery device includes:

[0019] Determine the projection position of the test component on the radiographic image;

[0020] The movement trajectory of the test component is planned based on the projection position and the test point;

[0021] Control the test component to move to the test point according to the movement trajectory.

[0022] In the above technical solution, by determining the projection position of the test component on the radiographic image, and planning the movement trajectory of the test component based on the projection position and the test point, the movement of the test component matches the actual position of the test point. This automated test component movement control technology reduces the uncertainty of human operation and improves the accuracy of the test.

[0023] In some embodiments, the test component includes an opening component and a needle penetration component; controlling the test component in the test device to move to the test point to perform a needle penetration test on the battery device includes:

[0024] The hole-opening assembly is controlled to move to the test point, and the hole-opening assembly is controlled to open a hole at the location of the test point in the battery device according to the preset hole-opening depth.

[0025] Once the hole is drilled, the needle-piercing assembly is moved to the test point, and the needle-piercing assembly is controlled to pierce the location of the test point in the battery device according to the preset needle-piercing depth.

[0026] In the above technical solution, by controlling the opening component to move to the test point first to open the battery device, the impact of the battery device's casing on the individual battery cells during the needle penetration test is reduced, thus improving the accuracy of the test.

[0027] In some embodiments, the method further includes:

[0028] During the needle penetration test of the battery device, the temperature of the preset area on the top cover of the battery device corresponding to the test point is monitored by a thermal imager, and / or the voltage of the target battery cell corresponding to the test point is monitored.

[0029] The temperature of the target battery cell is calculated based on the temperature of the preset region.

[0030] The test is stopped when the temperature of the target battery cell meets a first preset condition, and / or when the voltage of the target battery cell meets a second preset condition.

[0031] In the above technical solution, since the gas released after the thermal runaway valve of a single battery cell surges upward, the temperature change of the target battery cell can be assessed by real-time monitoring of the temperature of the preset area corresponding to the test point on the battery pack during the nail penetration test. This allows for timely detection of internal thermal runaway phenomena without the need for pre-installed temperature sensing wires inside the battery pack, reducing the risk of inaccurate temperature readings due to wire detachment or damage to the airtightness of the battery pack housing caused by wires escaping from the sealing interface. Monitoring the voltage of the target battery cell helps to understand the electrochemical reaction state of the battery. The test automatically stops when the temperature and voltage meet certain conditions, reducing test deviations caused by manual stopping during observation.

[0032] In some embodiments, the preset area is determined based on the target battery cell and the battery cells adjacent to the target battery cell; the battery cells adjacent to the target battery cell include the two battery cells with the largest contact surface with the target battery cell.

[0033] In the above technical solution, since the heat generated by the target battery cell will be conducted to the surroundings, especially the two battery cells with the largest contact surface with the target battery cell, the temperature of the target battery cell can be accurately estimated by monitoring the temperature of the target battery cell and the adjacent battery cells in the preset area of ​​the battery device cover.

[0034] Secondly, embodiments of this application provide a testing apparatus, including: a scanning component, a battery device mounting platform, a moving component, a testing component disposed on the moving component, and a controller;

[0035] The controller is used to execute the test method for the battery device as described in the first aspect above.

[0036] In the above technical solution, the battery device is scanned by the scanning component to obtain a radiographic image of the battery device. The radiographic image can be used to determine the positional distribution of the individual battery cells inside the battery device. Based on the positional distribution of the individual battery cells, the test points that need to be tested can be located. Then, the test component is controlled to move to the test point, realizing the automation of the test. This reduces the large errors caused by manual measurement, makes the location of the test points more reliable, and improves the accuracy of the battery device test.

[0037] In some embodiments, the device further includes a housing;

[0038] The movable component is movably disposed at the bottom of the housing;

[0039] The battery mounting platform is located between the top of the mobile component and the housing.

[0040] In some embodiments, the test component includes an opening component and a needle-punching component; the opening component and the needle-punching component are disposed at an interval on the movable component.

[0041] In some embodiments, the scanning assembly includes a radiation source and a detector;

[0042] The radiation source is disposed on the top of the housing or on the side wall of the housing;

[0043] The detector is located between the bottom of the housing and the battery mounting platform.

[0044] In some embodiments, the device further includes a thermal imager;

[0045] The thermal imager is mounted on the top of the housing or on the side wall of the housing;

[0046] When the battery device is mounted on the battery device mounting platform, the thermal imager is positioned above the top of the battery device.

[0047] Thirdly, this application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement a testing method for a battery device as described in the first aspect above.

[0048] Fourthly, this application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the testing method for the battery device as described in the first aspect above.

[0049] Fifthly, this application provides a chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the testing method for the battery device as described in the first aspect above.

[0050] In a sixth aspect, this application provides a computer program product, including a computer program that, when executed by a processor, implements the testing method for the battery device as described in the first aspect above. Attached Figure Description

[0051] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a schematic diagram of the vehicle structure provided in the embodiments of this application;

[0053] Figure 2 This is an exploded view of the battery device provided in the embodiments of this application;

[0054] Figure 3 This is a front view of the testing apparatus provided in the embodiments of this application;

[0055] Figure 4 This is a perspective view of the testing apparatus provided in the embodiments of this application;

[0056] Figure 5 This is a schematic flowchart of the testing method for the battery device provided in the embodiments of this application;

[0057] Figure 6 This is a schematic diagram of the scanning process of the scanning component provided in the embodiments of this application;

[0058] Figure 7 This is a schematic diagram of the test point location process provided in the embodiments of this application;

[0059] Figure 8 This is a scenario example provided in the embodiments of this application;

[0060] Figure 9 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application.

[0061] Figure label:

[0062] Vehicle 1000; Battery unit 100; Controller 200; Motor 300; Housing 10; First housing body 11; Second housing body 12; Battery cell 20; Testing device 400; Battery unit mounting platform 401; Moving component 402; X-ray source 403; Detector 404; Opening component 405; Needle piercing component 406; Thermal imager 407. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all 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.

[0064] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0065] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0066] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0068] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0069] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0070] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0071] Battery cells can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to any of these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to any of these types either.

[0072] A battery cell includes a casing, electrode components, and electrolyte. The casing houses the electrode components and electrolyte. The electrode components consist of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer. The positive current collector includes a current collector body and a positive electrode tab. The positive active material layer is coated on the surface of the current collector body, while the positive electrode tab is not coated with the positive active material layer and protrudes from the current collector body. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative current collector includes a current collector body and a negative electrode tab. The negative active material layer is coated on the surface of the current collector body, while the negative electrode tab is not coated with the negative active material layer and protrudes from the current collector body. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0073] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0074] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, including aircraft, rockets, space shuttles, and spacecraft. Individual battery cells are used to store or provide electrical energy.

[0075] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, the power battery, as the power source, plays an irreplaceable and crucial role. A battery pack consists of a casing and multiple individual battery cells housed within it. As a core component of new energy vehicles, the battery pack has high requirements in terms of both safety and cycle life.

[0076] The nail penetration test is a crucial experiment for evaluating the safety of power batteries. It simulates the extreme condition of a battery being punctured by a sharp object. In the test, a fully charged battery is placed on a flat surface, and a steel needle is used to puncture the battery radially to trigger an internal short circuit, thus assessing the battery's response under extreme conditions. This test effectively simulates the occurrence of a battery short circuit. When the needle penetrates, the battery's electrical energy is converted into heat and stored internally, potentially causing smoke, leakage, or even fire and explosion. Through improvements in materials and structural design, high-energy lithium-ion batteries can pass the nail penetration test, demonstrating good safety performance.

[0077] The inventors discovered that, since the distribution of individual battery cells cannot be seen after the battery pack is assembled, in the process of conducting nail penetration tests, testers will assess the distance between the target position and the edge of the battery pack based on the dimensions of the battery pack design model, flip or lift the battery pack, and manually measure to determine the opening and nail penetration points. This method may lead to a large error in the nail penetration position, resulting in a large test deviation.

[0078] Based on the above considerations, and to address the significant errors in needle penetration location caused by manual measurement of opening and needle penetration points, resulting in substantial testing deviations, the inventors, after in-depth research, designed a battery device testing method. This method includes: controlling a scanning component to scan the battery device within a testing apparatus to obtain a radiographic image of the battery device; locating test points based on the positional distribution of individual battery cells within the battery device in the radiographic image; and controlling a testing component within the testing apparatus to move to the test point to perform a needle penetration test on the battery device. In this battery device testing method, by controlling the scanning component to scan the battery device and obtain a radiographic image, the positional distribution of individual battery cells within the battery device can be determined. This allows for the location of the test points based on the individual battery cell positions, and the control of the testing component to move to the test point automates the testing process, reduces the large errors caused by manual measurement, makes the location of test points more reliable, and improves the accuracy of battery device testing.

[0079] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0080] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0081] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0082] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0083] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0084] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0085] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0086] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0087] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0088] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. The battery device is used to store or provide electrical energy.

[0089] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0090] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is installed inside the vehicle, and the battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0091] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0092] Please refer to Figure 2 , Figure 2 This is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a plurality of battery cells 20, which are housed within the housing 10. The housing 10 provides assembly space for the battery cells 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing body 11 and a second housing body 12, which overlap each other, and together define an assembly space for accommodating the battery cells 20. The second housing body 12 may be a hollow structure open at one end, and the first housing body 11 may be a plate-like structure, with the first housing body 11 covering the open side of the second housing body 12, so that the first housing body 11 and the second housing body 12 together define the assembly space; alternatively, the first housing body 11 and the second housing body 12 may both be hollow structures open on one side, with the open side of the first housing body 11 covering the open side of the second housing body 12. Of course, the box 10 formed by the first box body 11 and the second box body 12 can be of various shapes, such as cylinder, cuboid, etc.

[0093] In the battery device 100, multiple battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0094] Please refer to Figure 2 The battery device 100 includes multiple rows of battery cells 20, which are arranged along a first direction. Each row of battery cells 20 includes multiple battery cells 20 arranged along a second direction. The first direction and the second direction are the length direction and the width direction of the housing 10, respectively, and the first direction and the second direction are perpendicular to each other.

[0095] The following description, in conjunction with the accompanying drawings, details the testing methods, testing devices, electronic devices, and storage media for the battery devices provided in this application, through specific embodiments and application scenarios.

[0096] First, the testing apparatus provided in the embodiments of this application is introduced, referring to... Figure 3 and Figure 4 , Figure 3 This is a front view of a test apparatus 400 provided in some embodiments of this application. Figure 4 This is a perspective view of the testing apparatus 400. The testing apparatus 400 may include a scanning component, a battery mounting platform 401, a moving component 402, and a testing component mounted on the moving component 402. The testing apparatus 400 can simulate a battery being punctured by a sharp object to test the battery's safety.

[0097] In some embodiments, the scanning assembly may include a radiation source 403 and a detector 404. The radiation source 403 is a device capable of generating predetermined levels of X-rays, gamma rays, electron beams, or neutron rays containing a radioactive source. The detector 404 is used to convert invisible radiation into a visible image, thereby facilitating intuitive observation and analysis of the internal structure of the battery device 100. The detector 404 operates based on the photoelectric effect, the effect produced by the interaction of light radiation with matter, converting light signals into electrical signals. The detector 404 senses the intensity of radiation passing through the object and, based on the intensity differences of radiation at different locations, presents a detailed image of the object's interior in the form of black and white values ​​(grayscale levels).

[0098] The battery device mounting platform 401 provides a stable platform for placing and securing the battery device 100. In some embodiments, the battery device mounting platform 401 may include a base and a clamping assembly, which can be used to secure the battery device 100, thereby keeping the battery device 100 stable during the nail penetration test and reducing the possibility of inaccurate test results due to battery movement.

[0099] The moving component 402 is a device in the needle penetration testing apparatus 400 used to control the movement of the test component. In some embodiments, the moving component 402 may include mechanical structures such as a motor, a lead screw, and a slider, which work together to achieve precise movement of the test component.

[0100] The test assembly is the part that directly contacts the battery device 100 and performs a nail penetration test. In some embodiments, the test assembly may include an opening assembly 405 and a nail penetration assembly 406. The opening assembly 405 may be used to make an opening in the housing 10 of the battery device 100 for nail penetration testing, and the nail penetration assembly 406 is used to perform the actual nail penetration operation.

[0101] In some embodiments, after the battery device 100 to be tested is mounted on the battery device mounting platform 401, the scanning component can be controlled to scan the battery device 100 to obtain a radiographic image of the battery device 100. This radiographic image includes the internal structure of the battery device 100, such as the positional distribution of multiple battery cells 20. Based on the positional distribution of the multiple battery cells 20, the battery cell 20 to be tested can be selected, and the center of the selected battery cell 20 is determined as the test point. The testing component is then controlled to move to the test point to perform a needle penetration test on the battery device.

[0102] In some embodiments, the testing device 400 may include a housing, which may be a square housing or a housing of other shapes. The housing includes a top surface, a bottom surface and side walls. The scanning component, the battery device mounting platform 401 and the moving component 402 may be disposed inside the housing.

[0103] In some embodiments, the moving component is movably disposed at the bottom of the housing. The moving component 402 may include mechanical structures such as a motor, a lead screw, and a slider, which work together to achieve precise movement of the test component.

[0104] The battery mounting platform 401 is located between the moving component and the top of the housing. The battery mounting platform 401 can be connected to the side wall of the housing to fix the battery mounting platform 401. With this arrangement, after the battery device 100 is mounted on the battery mounting platform 401, the moving component can move the test component to the corresponding position of the battery device 100, so that the test component can perform a needle penetration test from the bottom of the battery device 100.

[0105] In some embodiments, the test assembly includes an opening assembly 405 and a needle-punching assembly 406; the opening assembly 405 and the needle-punching assembly 406 are spaced apart on the moving assembly. The opening assembly 405 and the needle-punching assembly 406 can share a set of moving assemblies, which can reduce costs and save space inside the housing.

[0106] In some embodiments, the scanning assembly may include a radiation source 403 and a detector 404. The radiation source 403 may be disposed on the top of the housing or on the side wall of the housing as needed, and the detector 404 may be located between the bottom of the housing and the battery device mounting platform to better sense the intensity of radiation passing through the battery device 100. It should be noted that when the radiation source 403 is positioned on the side wall of the housing, and the battery device 100 is mounted on the battery device mounting platform 401, the height of the radiation source 403 is higher than the top of the battery device 100 to facilitate better scanning of the battery device 100.

[0107] In the above technical solution, the battery device is scanned by the scanning component to obtain a radiographic image of the battery device. The radiographic image can be used to determine the positional distribution of the individual battery cells inside the battery device. Based on the positional distribution of the individual battery cells, the test points that need to be tested can be located. Then, the test component is controlled to move to the test point, realizing the automation of the test. This reduces the large errors caused by manual measurement, makes the location of the test points more reliable, and improves the accuracy of the battery device test.

[0108] In related technologies, temperature sensing wires are placed inside the battery pack to detect thermal runaway during nail penetration testing. However, this method requires the temperature sensing wires to be placed in advance, and during the test, the wires are prone to detachment or leakage from the battery pack's sealing interface, causing damage to the battery pack's airtightness and resulting in inaccurate test results.

[0109] To address the aforementioned issues, in some embodiments, the testing apparatus 400 may further include a thermal imager 407. The thermal imager 407 may be mounted on the top of the housing or on the side wall of the housing. When the battery device 100 is mounted on the battery device mounting platform 401, the thermal imager 407 is positioned higher than the top of the battery device 100 to facilitate better measurement of the battery device 100.

[0110] Among them, the thermal imager 407 is a device that uses infrared thermal imaging technology to detect the infrared radiation of an object and perform signal processing, photoelectric conversion and other means to convert the temperature distribution image of the object into a visual image.

[0111] Considering that the gas released from the battery cell 20 after thermal runaway valve opening during the nail penetration test surges upward, and that the top cover of the battery cell 20 is close to the top cover of the battery device 100, temperature will be conducted through the top cover of the battery device 100. The temperature collected by the thermal imager 407 is the surface temperature of the top cover of the battery device 100. Since there is temperature loss due to conduction, the temperature of the battery cell 20 can be calculated using the following formula:

[0112]

[0113] Among them, T a T represents the temperature of a single battery cell 20. m The temperature measured by the thermal imager 407 is represented by , and k represents the temperature loss coefficient. The temperature loss coefficient can be obtained through experimental verification and thermodynamic analysis.

[0114] In some embodiments, since the distance of temperature conduction is limited, the temperature of the punctured battery cell 20 corresponding to a preset area on the top cover of the battery device 100 can be obtained, and the temperature of the battery cell 20 can be calculated based on the temperature.

[0115] In some embodiments, considering that the heat conduction of the punctured battery cell 20 is mainly towards the top cover of the battery device 100, with a portion also conducted to adjacent battery cells 20, and then transferred upwards to the top cover of the battery device 100 via the adjacent battery cells 20, the preset area can be the area of ​​the top cover of the battery device 100 corresponding to the punctured battery cell 20 and the adjacent battery cells 20. The adjacent battery cells 20 can be the two battery cells with the largest contact surface with the punctured battery cell 20.

[0116] In the above technical solution, since the heat generated by the target battery cell will be conducted to the surroundings, especially the two battery cells with the largest contact surface with the target battery cell, the temperature of the target battery cell and the adjacent battery cells corresponding to the preset area of ​​the battery device cover can be accurately estimated by monitoring the temperature of the target battery cell.

[0117] In some embodiments, the temperature and / or voltage of the battery cell 20 can be combined to determine whether a predefined thermal runaway condition is met. If the condition is met, the test can be automatically stopped, thereby reducing test deviations caused by manual stopping due to human observation.

[0118] Specifically, a first preset condition can be defined in advance. For example, the first preset condition may include the target battery cell reaching a preset temperature, such as 85℃, 95℃, or 100℃, or the target battery cell reaching a preset temperature rate, such as 1℃ per second or 1.5℃ per second. The test automatically stops when the first preset condition is met.

[0119] A second preset condition is defined in advance. For example, the second preset condition may include a voltage drop to a preset voltage value, or a voltage drop magnitude greater than a preset magnitude. The test automatically stops when the second preset condition is met.

[0120] The following describes a testing method for a battery device provided in an embodiment of this application. This testing method can be applied to a terminal, and can be executed by hardware or software within the terminal.

[0121] The terminal includes, but is not limited to, portable communication devices such as mobile phones or tablets with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads). It should also be understood that, in some embodiments, the terminal may not be a portable communication device, but rather a desktop computer with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads).

[0122] The following embodiments describe a terminal including a display and a touch-sensitive surface. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, mouse, and joystick.

[0123] The battery device testing method provided in this application embodiment can be executed by an electronic device or a functional module or entity in an electronic device that can implement the battery device testing method. The electronic device has the function of a gateway device. The electronic devices mentioned in this application embodiment include, but are not limited to, mobile phones, tablets, computers, cameras and wearable devices. The following uses an electronic device as the execution subject to illustrate the battery device testing method provided in this application embodiment.

[0124] like Figure 5 As shown, the test method for the battery device includes steps 510, 520 and 530.

[0125] Step 510: Control the scanning component to scan the battery device in the test device to obtain a radiographic image of the battery device.

[0126] In this embodiment of the application, the scanning component can scan the battery device and generate a radiographic image of the battery device. Through the radiographic image, the distribution of the battery cells inside the battery device can be intuitively understood.

[0127] The scanning assembly may include a radiation source and a detector. The radiation source is a device capable of generating predetermined levels of X-rays, gamma rays, electron beams, or neutron rays, which contain radioactive sources. The detector is used to convert invisible radiation into visible images, thereby facilitating intuitive observation and analysis of the internal structure of the battery device. The detector operates based on the photoelectric effect, the effect produced by the interaction of light radiation with matter, converting light signals into electrical signals. Detector 404 senses the intensity of radiation passing through the object and, based on the intensity differences of radiation at different locations, presents a detailed image of the object's interior in the form of black and white values ​​(grayscale levels).

[0128] After the battery device to be tested is installed on the battery device mounting platform of the test device, the scanning component can be controlled to scan the battery device and obtain a radiographic image of the battery device.

[0129] Step 520: Locate the test points based on the positional distribution of individual battery cells within the battery device in the radiographic image.

[0130] In some embodiments, the test location can be preset according to test requirements. For example, the center of the battery cell can be used as the test location, or other locations of the battery cell can be used as test locations. After acquiring the radiographic image, the target battery cell to be tested can be determined based on the positional distribution of battery cells within the battery device in the radiographic image. Based on the preset test location, the test point can be determined based on the location of the target battery cell.

[0131] In some embodiments, the target battery cell to be tested can be preset. For example, the target battery cell can be set as a battery cell arranged in m rows and n columns in the battery device. The position of the target battery cell in m rows and n columns can be determined according to the position distribution of the battery cells in the radiographic image, thereby locating the test point.

[0132] In some embodiments, locating test points based on the positional distribution of individual battery cells within the battery device in a radiographic image includes:

[0133] In response to a selection operation triggered by the user on the radiographic image, the target battery cell corresponding to the selection operation is obtained;

[0134] The preset position on the target battery cell is determined as the test point.

[0135] In this embodiment, after acquiring the radiation image, it can be displayed so that the user can select the target battery cell to be tested on the radiation image. For example, the user can make selections in the displayed radiation image using a mouse, touch, or other means, and the corresponding target battery cell is determined based on the user's selection, thereby locating the test point.

[0136] In the above technical solution, since the radiographic image includes the location distribution of battery cells within the battery device, the user can intuitively select the target battery cell to be tested from the radiographic image according to the test requirements, and then determine the preset position on the target battery cell as the test point. This not only reduces the error of human measurement, but also improves the efficiency and accuracy of the test.

[0137] Step 530: Control the test components in the test device to move to the test point to perform a nail penetration test on the battery device.

[0138] In this embodiment, the test component is the part that directly contacts the battery device and performs the nail penetration test. In some embodiments, the test component can be a needle-punching component, and the nail-punching operation can be performed after the needle-punching component moves to the location of the test point.

[0139] Of course, to reduce the problem of battery cells being squeezed by the battery housing due to the direct needle penetration operation of the needle penetration assembly, a hole can be made in the battery housing before the needle penetration operation. Specifically, the test assembly can also include a hole-making assembly, which can be used to make holes in the battery housing for needle penetration testing.

[0140] In the above technical solution, the battery device is scanned by the scanning component to obtain a radiographic image of the battery device. The radiographic image can be used to determine the positional distribution of the individual battery cells inside the battery device. Based on the positional distribution of the individual battery cells, the test points that need to be tested can be located. Then, the test component is controlled to move to the test point, realizing the automation of the test. This reduces the large errors caused by manual measurement, makes the location of the test points more reliable, and improves the accuracy of the battery device test.

[0141] In some embodiments, before locating test points based on the positional distribution of individual battery cells within the battery device in the radiographic image, the process includes:

[0142] The magnification ratio of the radiographic image relative to the battery device is calculated based on the relative distance between the scanning components and the battery device.

[0143] The radiographic image is adjusted to the same size as the battery device based on the magnification ratio.

[0144] In this embodiment, since the radiographic image generated by the scanning component is a magnified version of the battery device, in order to determine the actual positional distribution of the battery cells within the battery device, the radiographic image can be adjusted to a scale that is the same size as the battery device.

[0145] Specifically, the magnification ratio of the radiographic image relative to the battery device can be calculated based on the relative distance between the scanning component and the battery device, and the radiographic image can be adjusted to an image of the same size as the battery device based on the magnification ratio.

[0146] In one example, the relative positions of the scanning component and the battery device are as follows: Figure 6 As shown, assuming the magnification ratio is X, the distance d from the X-ray source of the scanning component to the battery device, and the distance D from the X-ray source to the detector of the scanning component, then the magnification ratio X is:

[0147]

[0148] The area of ​​the radiographic image is M. Keeping the center of the radiographic image unchanged, the area is scaled proportionally to obtain an image area m of the same size as the battery device:

[0149]

[0150] Establish a coordinate system for the adjusted radiographic image, such as Figure 7 As shown, the center of the radiographic image can be taken as the origin of the two-dimensional coordinate axis, i.e., point A(0,0). Assuming the needle puncture position is the center of the target battery cell to be tested, after determining the target battery cell, the test point B(x1,y1) can be located, or the center B1(x1,y1) of the adjacent cell of the target battery cell can be located. 11 ,y 11 ) and B2(x 12 ,y 12 ).

[0151] In the above technical solution, by calculating the magnification ratio of the radiographic image relative to the battery device and adjusting the image size to match the actual size of the battery device, the position of the battery cell in the radiographic image can be mapped to the actual size, which facilitates the determination of test points for the actual distribution of battery cells in the battery device and improves the accuracy of test point determination.

[0152] In some embodiments, controlling a test component in a test apparatus to move to a test point to perform a nail penetration test on the battery device includes:

[0153] Determine the projection position of the test component on the radiographic image;

[0154] Plan the movement trajectory of the test components based on the projection position and test points;

[0155] The control test component moves to the test point according to the movement trajectory.

[0156] In some embodiments, before performing a nail penetration test on the battery device, the test component can be located in an initial position. Since the test component is fixed in the initial position, the projection position of the test component on the radiographic image is also fixed. Therefore, the projection position of the test component on the radiographic image can be predetermined, such as... Figure 7 As shown, the projection position of the opening component on the radiographic image is C(x2,y2), and the projection position of the needle punch component on the radiographic image is D(x3,y3).

[0157] Of course, in some embodiments, the test component may not be in its initial position before the battery device is subjected to a needle penetration test. A position sensor may be provided on the test component, and the position of the test component may be calculated in real time based on the measurement data of the position sensor, thereby obtaining the projected position of the test component on the radiographic image.

[0158] After determining the projected position of the test component on the radiographic image, the movement trajectory of the test component is planned based on the projected position and the test points. Specifically, in cases such as... Figure 7 In the coordinate system shown, the position coordinates of the test point and the position coordinates of the projected position can be used to calculate the distance the test component moves along the x-axis and the distance it moves along the y-axis.

[0159] x d1 =x1-x2

[0160] y d1 =y1-y2

[0161] x d2 =x1-x3

[0162] y d2 =y1-y3

[0163] Where, x d1 The y-axis represents the distance the opening assembly moves along the x-axis. d1 The x represents the distance the opening assembly moves along the y-axis. d2 The distance the needle assembly moves along the x-axis is represented by the y-axis. d2 This represents the distance the needle component moves along the y-axis. The distance is a square movement towards the coordinate axis when it is positive.

[0164] In this embodiment, the test component can be controlled to move first along the x-axis and then along the y-axis, or the test component can be controlled to move first along the y-axis and then along the x-axis. This embodiment of the application does not limit this.

[0165] In the above technical solution, by determining the projection position of the test component on the radiographic image, and planning the movement trajectory of the test component based on the projection position and the test point, the movement of the test component matches the actual position of the test point. This automated test component movement control technology reduces the uncertainty of human operation and improves the accuracy of the test.

[0166] In some embodiments, controlling a test component in a test apparatus to move to a test point to perform a nail penetration test on the battery device includes:

[0167] The opening assembly is controlled to move to the test point, and the opening assembly is controlled to make an opening at the location of the test point in the battery device according to the preset opening depth.

[0168] Once the hole is drilled, the needle-piercing assembly is moved to the test point, and the needle-piercing assembly is controlled to pierce the location of the test point in the battery device according to the preset needle-piercing depth.

[0169] In this embodiment, to reduce the problem of battery cell compression caused by the direct piercing operation of the piercing component on the battery device, the drilling component can be controlled to move to the test point before the piercing operation. The drilling component is then controlled to drill a hole at the test point location in the battery device according to a preset drilling depth. Specifically, a preset drilling depth can be obtained, the drilling depth can be calculated based on the drilling depth, and the drilling component is controlled to drill a hole at the test point location in the battery device according to the drilling depth. The calculation process for the drilling depth is as follows:

[0170] z d1 =H1+h1

[0171] Among them, z d1 H1 represents the depth of the hole, H1 represents the distance between the hole assembly and the battery device, and h1 represents the preset drilling depth.

[0172] After drilling is completed, the drilling assembly can be controlled to return to its initial position, and the needle-piercing assembly can be controlled to move to the test point. Based on the preset piercing depth, the needle-piercing assembly is controlled to pierce the test point in the battery device. Specifically, the preset drilling depth can be obtained, the piercing depth can be calculated based on the drilling depth, and the needle-piercing assembly is controlled to pierce the test point in the battery device based on the piercing depth. The calculation process for the piercing depth is as follows:

[0173] z d2 =H2+h2

[0174] Among them, z d2 H2 represents the drilling depth, H2 represents the distance between the needle-piercing component and the battery device, and h2 represents the preset drilling depth.

[0175] In the above technical solution, by controlling the opening component to move to the test point first to open the battery device, the impact of the battery device's casing on the individual battery cells during the needle penetration test is reduced, thus improving the accuracy of the test.

[0176] In related technologies, temperature sensing wires are placed inside the battery pack to detect thermal runaway during nail penetration testing. However, this method requires the temperature sensing wires to be placed in advance, and during the test, the wires are prone to detachment or leakage from the battery pack's sealing interface, causing damage to the battery pack's airtightness and resulting in inaccurate test results.

[0177] To address the aforementioned issues, the testing apparatus may also include a thermal imager.

[0178] In some embodiments, the method further includes:

[0179] During the nail penetration test of the battery device, the temperature of the preset area corresponding to the test point on the top cover of the battery device is monitored by a thermal imager, and / or the voltage of the target battery cell corresponding to the test point is monitored.

[0180] Calculate the temperature of the target battery cell based on the temperature of the preset area;

[0181] The test is stopped when the temperature of the target battery cell meets the first preset condition, and / or when the voltage of the target battery cell meets the second preset condition.

[0182] In this embodiment, considering that the gas released from the battery cell after thermal runaway valve opening during the needle penetration test surges upward, and that the battery cell cover is close to the battery assembly cover, temperature will be conducted through the battery assembly cover. The temperature collected by the thermal imager is the surface temperature of the battery assembly cover. Since temperature loss occurs during conduction, the temperature of the battery cell can be calculated using the following formula:

[0183]

[0184] Among them, T a T represents the temperature of a single battery cell. m The value represents the measurement temperature of the thermal imager, and k represents the temperature loss coefficient. The temperature loss coefficient can be obtained through experimental verification and thermodynamic analysis.

[0185] In this embodiment, a first preset condition can be predefined. For example, the first preset condition may include the target battery cell reaching a preset temperature, such as 85°C, 95°C, or 100°C, or the target battery cell reaching a preset temperature rate, such as 1°C per second or 1.5°C per second. The test automatically stops when the first preset condition is met.

[0186] In some embodiments, the voltage of the target battery cell can also be monitored, and a second preset condition can be predefined. For example, the second preset condition may include a voltage drop to a preset voltage value, or a voltage drop magnitude greater than a preset magnitude. The test automatically stops when the second preset condition is met.

[0187] In the above technical solution, since the gas released after the thermal runaway valve of a single battery cell surges upward, the temperature change of the target battery cell can be assessed by real-time monitoring of the temperature of the preset area corresponding to the test point on the battery pack during the nail penetration test. This allows for timely detection of internal thermal runaway phenomena without the need for pre-installed temperature sensing wires inside the battery pack, reducing the risk of inaccurate temperature readings due to wire detachment or damage to the airtightness of the battery pack housing caused by wires escaping from the sealing interface. Monitoring the voltage of the target battery cell helps to understand the electrochemical reaction state of the battery. The test automatically stops when the temperature and voltage meet certain conditions, reducing test deviations caused by manual stopping during observation.

[0188] In some embodiments, the preset area is determined based on the target battery cell and the battery cells adjacent to the target battery cell; the battery cells adjacent to the target battery cell include the two battery cells with the largest contact surface with the target battery cell.

[0189] In this embodiment, considering the limited distance of heat conduction, the heat conduction of the punctured battery cell is mainly towards the top cover of the battery device, with a portion also conducted to adjacent battery cells, and then transferred upwards to the top cover of the battery device through the adjacent battery cells. Therefore, the preset area can be the area on the top cover of the battery device corresponding to the punctured battery cell and the adjacent battery cells. The adjacent battery cells can be the two battery cells with the largest contact surface with the punctured battery cell.

[0190] Specifically, such as Figure 7 As shown, B1(x) 11 ,y 11 ) and B2(x 12 ,y 12 The target battery cell B(x1,y1) is the center position of the two battery cells with the largest contact surface with the punctured battery cell. The values ​​are determined based on the target battery cell B(x1,y1) and the adjacent battery cell B1(x1,y1). 11 ,y 11) and B2(x 12 ,y 12 The location of the battery device can be used to determine the preset area corresponding to the top cover of the battery device. Based on the temperature of the preset area, the temperature of the target battery cell can be estimated.

[0191] In the above technical solution, since the heat generated by the target battery cell will be conducted to the surroundings, especially the two battery cells with the largest contact surface with the target battery cell, the temperature of the target battery cell and the adjacent battery cells corresponding to the preset area of ​​the battery device cover can be accurately estimated by monitoring the temperature of the target battery cell.

[0192] In one scenario example, the automated process for testing battery devices is as follows: Figure 8 As shown. In this scenario example, the scanning component uses an X-ray source to scan the battery device in the test device, obtaining a radiographic image of the battery device. This radiographic image is a grayscale image. The grayscale image is processed, such as image enhancement and proportional scaling. Then, the test points are located, and the movement trajectory of the test component is calculated and planned based on the test points. The movement of the test component is controlled according to the movement trajectory.

[0193] In this scenario example, during the needle penetration test, infrared imaging can be performed using a thermal imager to monitor the temperature of a preset area on the battery cover corresponding to the test point. The temperature of the target cell can be estimated based on the temperature of the preset area, and a logical judgment can be made based on the temperature of the target cell. The test will stop when the temperature of the target cell meets the first preset condition.

[0194] In some embodiments, this application also provides a testing apparatus, including: a scanning component, a battery device mounting platform, a moving component, a testing component disposed on the moving component, and a controller;

[0195] A controller for performing the test methods for the battery device described above.

[0196] In the above technical solution, the battery device is scanned by the scanning component to obtain a radiographic image of the battery device. The radiographic image can be used to determine the positional distribution of the individual battery cells inside the battery device. Based on the positional distribution of the individual battery cells, the test points that need to be tested can be located. Then, the test component is controlled to move to the test point, realizing the automation of the test. This reduces the large errors caused by manual measurement, makes the location of the test points more reliable, and improves the accuracy of the battery device test.

[0197] In some embodiments, the device further includes a housing;

[0198] The movable component is movably disposed at the bottom of the housing;

[0199] The battery mounting platform is located between the mobile component and the top of the housing.

[0200] In some embodiments, the test component includes an opening component and a needle-punching component; the opening component and the needle-punching component are spaced apart on the moving component.

[0201] In some embodiments, the scanning components include a radiation source and a detector;

[0202] The radiation source is located on the top of the housing or on the side wall of the housing;

[0203] The detector is located between the bottom of the housing and the battery mounting platform.

[0204] In some embodiments, the device further includes a thermal imager;

[0205] The thermal imager is mounted on the top of the housing or on the side wall of the housing;

[0206] When the battery device is mounted on the battery device mounting platform, the thermal imager is positioned above the top of the battery device.

[0207] The controller in this application embodiment can be an electronic device or a component within an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television set (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the scope of the controller.

[0208] In some embodiments, such as Figure 9As shown, this application embodiment also provides an electronic device 900, including a processor 901, a memory 902, and a computer program stored in the memory 902 and executable on the processor 901. When the program is executed by the processor 901, it implements the various processes of the above-described battery device testing method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0209] It should be noted that the electronic devices in the embodiments of this application include the aforementioned mobile electronic devices and non-mobile electronic devices.

[0210] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described battery device testing method embodiments and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0211] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0212] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described battery device testing method.

[0213] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0214] This application also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described battery-based device testing method embodiments and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0215] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0216] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0217] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods of the various embodiments of this application.

[0218] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0219] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0220] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A test method for a battery device, characterized in that, include: The scanning component is controlled to scan the battery device in the test apparatus to obtain a radiographic image of the battery device; The test points are located based on the positional distribution of individual battery cells within the battery device in the radiographic image. The test components in the test device are controlled to move to the test point to perform a nail penetration test on the battery device.

2. The method according to claim 1, characterized in that, Before locating test points based on the positional distribution of individual battery cells within the battery device in the radiographic image, the process includes: The magnification ratio of the radiographic image relative to the battery device is calculated based on the relative distance between the scanning component and the battery device. The radiographic image is adjusted to the same size as the battery device according to the magnification ratio.

3. The method according to claim 1, characterized in that, The step of locating test points based on the positional distribution of individual battery cells within the battery device in the radiographic image includes: In response to a selection operation triggered by a user on the radiographic image, the target battery cell corresponding to the selection operation is obtained; The preset position on the target battery cell is determined as the test point.

4. The method according to claim 1, characterized in that, The step of controlling the test component in the test device to move to the test point to perform a nail penetration test on the battery device includes: Determine the projection position of the test component on the radiographic image; The movement trajectory of the test component is planned based on the projection position and the test point; Control the test component to move to the test point according to the movement trajectory.

5. The method according to claim 1, characterized in that, The test assembly includes an opening assembly and a needle penetration assembly; controlling the test assembly in the test device to move to the test point to perform a needle penetration test on the battery device includes: The hole-opening assembly is controlled to move to the test point, and the hole-opening assembly is controlled to open a hole at the location of the test point in the battery device according to the preset hole-opening depth. Once the hole is drilled, the needle-piercing assembly is moved to the test point, and the needle-piercing assembly is controlled to pierce the location of the test point in the battery device according to the preset needle-piercing depth.

6. The method according to claim 1, characterized in that, The method further includes: During the needle penetration test of the battery device, the temperature of the preset area on the top cover of the battery device corresponding to the test point is monitored by a thermal imager, and / or the voltage of the target battery cell corresponding to the test point is monitored. The temperature of the target battery cell is calculated based on the temperature of the preset region. The test is stopped when the temperature of the target battery cell meets a first preset condition, and / or when the voltage of the target battery cell meets a second preset condition.

7. The method according to claim 6, characterized in that, The preset area is determined based on the target battery cell and the battery cells adjacent to the target battery cell; the battery cells adjacent to the target battery cell include the two battery cells with the largest contact surface with the target battery cell.

8. A testing device, characterized in that, include: Scanning component, battery device mounting platform, moving component, test component and controller mounted on the moving component; The controller is configured to perform the method as described in any one of claims 1-7.

9. The apparatus according to claim 8, characterized in that, The device also includes a housing; The movable component is movably disposed at the bottom of the housing; The battery mounting platform is located between the top of the mobile component and the housing.

10. The apparatus according to claim 9, characterized in that, The test component includes an opening component and a needle-punching component; the opening component and the needle-punching component are spaced apart on the moving component.

11. The apparatus according to claim 9, characterized in that, The scanning assembly includes a radiation source and a detector; The radiation source is disposed on the top of the housing or on the side wall of the housing; The detector is located between the bottom of the housing and the battery mounting platform.

12. The apparatus according to claim 9, characterized in that, The device also includes a thermal imager; The thermal imager is mounted on the top of the housing or on the side wall of the housing; When the battery device is mounted on the battery device mounting platform, the thermal imager is positioned above the top of the battery device.

13. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the method as described in any one of claims 1-7.

14. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1-7.

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