Battery deformation detection method and battery deformation detection device

Abstract

The invention relates to the technical field of battery deformation detection, in particular to a battery deformation detection method and a battery deformation detection device. According to the battery deformation detection method provided by the invention, the initial position data of multiple points on the surface of the to-be-detected battery is collected as a reference, and the real-time position data of each point is synchronously collected in the charging and discharging process, so that the comprehensive monitoring of the three-dimensional deformation of the to-be-detected battery is realized. By moving the detection unit to the preset detection point, compared with the prior art, the number and the positions of the detection points can be flexibly customized according to requirements, and deformation information of any position of the surface of the to-be-detected battery can be obtained. According to the battery deformation detection method, deformation detection and charging and discharging testing are synchronously carried out, the coupling relation between deformation and electrochemical performance can be captured in real time, and data support is provided for battery mechanism research and structure optimization.

Description

Technical Field

[0001] This invention relates to the field of battery deformation detection technology, and in particular to a battery deformation detection method and a battery deformation detection device. Background Technology

[0002] Solid-state batteries are considered an important development direction for next-generation power batteries due to their advantages such as high energy density and good safety. However, during the charging and discharging process, the volume change of the active material in solid-state batteries causes three-dimensional deformation of the cell in the length, width, and thickness directions, affecting its safety and cycle life. Currently, solid-state battery testing usually requires the application of external pressure to improve interface contact, but the battery fixture can obstruct the detection line of sight, making it difficult to achieve real-time measurement of the overall three-dimensional deformation of the cell. Summary of the Invention

[0003] (i) The problem to be solved by the present invention is that: currently, solid-state battery testing usually requires the application of external pressure to improve interface contact, but the battery fixture will block the detection line of sight, making it difficult to achieve real-time measurement of the three-dimensional deformation of the entire cell.

[0004] (II) Technical Solution To address the aforementioned technical problems, this invention provides a battery deformation detection method, comprising the following steps: Place the battery under test on the support platform; The detection unit collects the initial position data of preset detection points on the surface of the battery under test as reference position data. Perform charge and discharge tests on the battery under test; When the battery under test is charged and discharged, the detection unit is moved to the preset detection point to collect the real-time position data of the battery under test in the X, Y and Z directions. The collected real-time location data is compared with the reference location data to calculate the three-dimensional deformation of the battery under test in the X, Y and Z directions during the charging and discharging process.

[0005] Optionally, the step of collecting the initial position data of the preset detection points on the surface of the battery under test as reference position data through the detection unit includes: The mobile detection unit moves sequentially to each preset detection point and collects the spatial coordinates or distance values ​​of each detection point in its initial state.

[0006] Optionally, the step of moving the detection unit to a preset detection point and collecting real-time position data of the battery under test in the X, Y, and Z directions during the charge-discharge test includes: During the charging and discharging process, the mobile detection unit repeatedly moves to each preset detection point according to a preset time interval or preset patrol path, and collects the real-time spatial coordinate value or distance value of each point during the test.

[0007] Optionally, the step of comparing the collected real-time location data with the reference location data to calculate the three-dimensional deformation of the battery under test in the X, Y, and Z directions during the charging and discharging process includes: Calculate the differences between the real-time position data and the reference position data at the same preset detection point in the X, Y, and Z directions, and use these differences as the X, Y, and Z deformations of the battery under test at that preset detection point.

[0008] Optionally, before performing the charge-discharge test on the battery under test as described in step [1], the following steps are also included: Connect the positive and negative tabs of the battery under test to the testing device.

[0009] Optionally, the step of placing the battery under test on the support platform includes: The battery under test is placed horizontally in the center of the support platform and fixed to the support platform by clamps.

[0010] In another aspect, the present invention provides a battery deformation detection device based on the above-described battery deformation detection method; the battery deformation detection device includes: a support platform, a detection unit, and a data processing unit; The support platform is used to support the battery under test; The detection unit is movably mounted on the support platform and is used to collect position data of preset detection points on the surface of the battery to be tested. The data processing unit is communicatively connected to the detection unit, and is used to receive and process the data collected by the detection unit.

[0011] Optionally, the detection units are configured in multiple ways, and at least one of the detection units is capable of moving along the X direction on the support platform, at least one of the detection units is capable of moving along the Y direction on the support platform, and at least one of the detection units is capable of moving along the Z direction on the support platform.

[0012] Optionally, it may also include a driving mechanism corresponding to the detection unit; The driving mechanism is connected to the corresponding detection unit and drives the corresponding detection unit to move on the support platform.

[0013] Optionally, a fixing clamp may also be included; The fixing clamp is set on the support platform and is used to fix the battery to be tested.

[0014] The beneficial effects of this invention are: The present invention provides a battery deformation detection method, comprising the following steps: Place the battery under test on the support platform; The detection unit collects the initial position data of preset detection points on the surface of the battery under test as reference position data. Perform charge and discharge tests on the battery under test; When the battery under test is charged and discharged, the detection unit is moved to the preset detection point to collect the real-time position data of the battery under test in the X, Y and Z directions. The collected real-time location data is compared with the reference location data to calculate the three-dimensional deformation of the battery under test in the X, Y and Z directions during the charging and discharging process.

[0015] By collecting initial position data from multiple points on the surface of the battery under test as a baseline, and simultaneously collecting real-time position data from each point during charging and discharging, comprehensive monitoring of the three-dimensional deformation of the battery under test is achieved. By moving the detection unit to preset detection points, compared to existing technologies, the number and position of detection points can be flexibly customized according to needs, obtaining deformation information at any location on the surface of the battery under test. Furthermore, the battery deformation detection method in this invention performs deformation detection and charge-discharge testing simultaneously, enabling real-time capture of the coupling relationship between deformation and electrochemical performance, providing data support for battery mechanism research and structural optimization. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A flowchart of a battery deformation detection method provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the battery deformation detection device provided in an embodiment of the present invention.

[0018] Icons: 110 - Support platform; 120 - Detection unit; 130 - Drive mechanism. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] One embodiment of the present invention discloses a battery deformation detection method for detecting the length, width, and height deformation of the battery cell during charging and discharging. The battery under test specifically includes various types of all-solid-state batteries such as halide solid-state batteries, oxide solid-state batteries, polymer solid-state batteries, and sulfide solid-state batteries.

[0027] like Figure 1 As shown, the battery deformation detection method includes the following steps: Place the battery under test on the support platform 110; The detection unit 120 collects the position data of the preset detection points on the surface of the battery under test in the initial state as the reference position data. Perform charge and discharge tests on the battery under test; When the battery under test is charged and discharged, the detection unit 120 is moved to the preset detection point to collect the real-time position data of the battery under test in the X, Y and Z directions. The collected real-time location data is compared with the reference location data to calculate the three-dimensional deformation of the battery under test in the X, Y and Z directions during the charging and discharging process.

[0028] In this embodiment, the battery under test is first placed on the support platform 110. Then, the detection unit 120 collects the initial position data of preset detection points on the surface of the battery under test as reference position data. The detection unit 120 can employ various non-contact ranging devices such as laser displacement sensors, white light interferometers, machine vision cameras, or ultrasonic ranging sensors. The preset detection points can be gridded array points, feature marker points, edge inflection points, or any custom-defined points on the surface of the battery under test. When collecting the initial position data of the preset detection points on the surface of the battery under test, the detection unit 120 can move sequentially to each preset detection point, recording the X, Y, and Z coordinate values ​​of each point in space or its distance relative to the detection unit 120, forming a reference dataset. After completing the reference data collection, a charge-discharge test is performed on the battery under test. During the charge-discharge test, the detection unit 120 is moved to the preset detection points to collect real-time position data of the battery under test in the X, Y, and Z directions. The frequency of real-time location data acquisition can be set as needed, for example, once per second, once per minute, or synchronized with changes in voltage and current during charging and discharging. Finally, the acquired real-time location data is compared with reference location data to calculate the three-dimensional deformation of the battery under test in the X, Y, and Z directions during charging and discharging. Finally, by summarizing and analyzing the deformation at all detection points, a three-dimensional deformation distribution map of the battery under test, a deformation-time curve, and the relationship between deformation and charging / discharging state can be obtained.

[0029] By collecting initial position data from multiple points on the surface of the battery under test as a baseline, and simultaneously collecting real-time position data from each point during charging and discharging, comprehensive monitoring of the three-dimensional deformation of the battery under test is achieved. By moving the detection unit 120 to preset detection points, compared to existing technologies, the number and position of detection points can be flexibly customized according to requirements, obtaining deformation information at any location on the surface of the battery under test. Furthermore, the battery deformation detection method in this invention performs deformation detection and charging / discharging testing simultaneously, enabling real-time capture of the coupling relationship between deformation and electrochemical performance, providing data support for battery mechanism research and structural optimization.

[0030] In an optional embodiment of the present invention, the step of collecting position data of the preset detection points on the surface of the battery under test in their initial state as reference position data through the detection unit 120 includes: The mobile detection unit 120 moves sequentially to each preset detection point and collects the spatial coordinates or distance values ​​of each detection point in its initial state.

[0031] In this embodiment, there are several ways to set the preset detection points. For example, the surface of the battery under test can be divided into equally spaced grids, and the intersections of the grids are the detection points. Alternatively, denser detection points can be set in specific areas of the battery under test, such as near the tabs, at edge corners, or in the central area. Detection points can also be set according to the appearance characteristics of the battery under test, such as at marked points or surface textures. During the movement of the detection unit 120, the detection unit 120 stops and collects the position data of each preset detection point it reaches. When collecting spatial coordinate values, a three-dimensional coordinate system can be established based on the support platform 110. The absolute coordinates of the detection point are calculated by combining the position feedback of the detection unit 120 in the X, Y, and Z directions with the distance measurement value of the detection unit 120 itself. When collecting distance values, the detection unit 120 can directly output the distance between itself and the measured point on the surface of the battery under test. This distance value, combined with the current spatial position of the detection unit 120, can be converted into coordinate values. The initial state refers to the state where the battery under test has not yet started charging or discharging and is in electrochemical equilibrium. Data is usually collected after the battery has been left to stand for a period of time to ensure data stability. The data collection process can be repeated multiple times to take an average value, in order to eliminate random errors.

[0032] In an optional embodiment of the present invention, the step of moving the detection unit 120 to a preset detection point and collecting real-time position data of the battery under test in the X, Y, and Z directions during the charge-discharge test of the battery under test includes: During the charging and discharging process, the mobile detection unit 120 repeatedly moves to each preset detection point according to a preset time interval or preset patrol path, and collects the real-time spatial coordinate value or distance value of each point during the test process.

[0033] In this embodiment, the preset time interval can be equal, such as collecting data every 1 second, 10 seconds, or 1 minute; or it can be non-equal, such as using a high frequency of data collection in the early stages of charging and discharging of the battery under test, and reducing the frequency in the later stages, or triggering data collection synchronously with key points such as voltage plateaus and capacity changes during charging and discharging. The preset polling path can be the same path sequence as when collecting baseline data, or it can be a path optimized according to real-time monitoring needs, such as prioritizing areas with drastic deformation changes. Repeatedly moving to each preset detection point means that during the entire charging and discharging process, the detection unit 120 will traverse all detection points multiple times, obtaining a set of real-time position data at the current moment after each traversal. For example, if there are 100 preset detection points, and the detection unit 120 moves to collect data at one point per second, then a full-point scan is completed every 100 seconds, obtaining a set of real-time data. As charging and discharging proceeds, multiple sets of real-time position data arranged in time sequence can be obtained. The method of collecting real-time spatial coordinate values ​​or distance values ​​is the same as when collecting baseline data, ensuring data comparability. During the data acquisition process, the moving speed and dwell time of the detection unit 120 can be adjusted according to the sensor's response speed and accuracy requirements. High-speed sensors can achieve rapid scanning, while high-precision sensors require a longer dwell time. The real-time acquired data corresponds one-to-one with timestamps, facilitating subsequent correlation analysis with electrochemical data such as voltage, current, and capacity during the charging and discharging process. In an optional embodiment of this invention, the step of comparing the acquired real-time position data with reference position data to calculate the three-dimensional deformation of the battery under test in the X, Y, and Z directions during the charging and discharging process includes: Calculate the differences between the real-time position data and the reference position data at the same preset detection point in the X, Y, and Z directions, and use these differences as the X, Y, and Z deformations of the battery under test at that preset detection point.

[0034] In this embodiment, the real-time acquired location data is first classified and stored according to the detection point number and timestamp. Then, for each detection point, its real-time location data at different times is compared point by point with the corresponding reference location data. Taking a certain detection point as an example, let its reference location coordinates be (X0, Y0, Z0), and the real-time location coordinates acquired at time t be (Xt, Yt, Zt). Then, the deformation of this point at time t is ΔX = Xt - X0, the deformation of the Y direction is ΔY = Yt - Y0, and the deformation of the Z direction is ΔZ = Zt - Z0. If the collected data is a distance value, it is necessary to convert the distance value into a coordinate value based on the spatial location of the detection unit 120 at the time of acquisition before calculation. The calculated deformation can be positive to indicate expansion and negative to indicate contraction. The above calculation is repeated for all detection points to obtain the deformation of each point at each time. The data processing unit can further visualize these deformations, such as generating a three-dimensional deformation cloud map, a deformation contour map, or a curve of deformation changing over time. Furthermore, statistical analysis can be performed, such as calculating the average deformation, maximum deformation, and deformation non-uniformity of the entire battery surface. If the number of detection points is large, an interpolation algorithm can be used to generate a continuous deformation field distribution. The calculation process can be performed in real time, i.e., calculating the deformation at the current moment immediately after each acquisition, or batch processing can be performed after all tests are completed. The calculation results can be displayed synchronously with data such as voltage, current, and capacity during the charging and discharging process, intuitively reflecting the correlation between deformation and electrochemical performance.

[0035] In an optional embodiment of the present invention, before performing a charge-discharge test on the battery under test, the step further includes: Connect the positive and negative tabs of the battery under test to the testing device.

[0036] In this embodiment, the testing device can be a battery charge-discharge tester, an electrochemical workstation, or a battery cycle testing system. Connection methods include using clamps to hold the tabs, welding wires, crimping terminals, or plugging connectors. After connection, contact checks and insulation tests are required to ensure reliable connection and no short-circuit risk. The testing device and data processing unit can be connected via communication cables or wirelessly to achieve synchronous control of the testing process. During testing, the testing device collects real-time data on the voltage, current, temperature, and capacity of the battery under test, and synchronizes this data with deformation detection data to ensure the accuracy of subsequent correlation analysis.

[0037] The collaborative work of the testing device and the data processing unit enables the deformation data and electrochemical data to be time-aligned, providing a foundation for subsequent analysis of the relationship between deformation and parameters such as voltage, capacitance, and internal resistance.

[0038] In an optional embodiment of the present invention, the step of placing the battery under test on the support platform 110 includes: The battery to be tested is placed horizontally in the center of the support platform 110, and the battery to be tested is fixed on the support platform 110 by a clamp.

[0039] In this embodiment, horizontal placement means ensuring that the bottom surface of the battery under test is in full contact with the bearing surface on the support platform 110, preventing the battery from tilting or being suspended. Placing it at the center of the support platform 110 helps ensure that the detection unit 120 has sufficient space to move during its movement, and also facilitates the establishment of a symmetrical coordinate system. The clamp can be a manual clamp, pneumatic clamp, hydraulic clamp, or spring clamping mechanism. The function of the clamp is to prevent the battery under test from shifting due to vibration, external force, or its own expansion during the testing process, ensuring that the reference position and real-time position of all detection points have the same reference system. For solid-state batteries that require external pressure testing, the clamp can also cooperate with a pressurizing mechanism to apply a set pressure value while fixing the battery. The support platform 110 itself can be equipped with a scale or positioning marks, thereby facilitating the rapid centering and placement of the battery under test.

[0040] Horizontal placement and center positioning ensure that the detection unit 120 can symmetrically cover the surface of the battery under test during movement, simplifying the establishment of the coordinate system and path planning. Fixture fixation solves the problem of possible displacement of the battery under test during testing, ensuring that the reference position and the real-time position have the same reference datum, and eliminating measurement errors introduced by the movement of the battery under test.

[0041] Another embodiment of the present invention provides a battery deformation detection device, which is based on the battery deformation detection method in any of the above embodiments. For example... Figure 2 As shown, the battery deformation detection device includes: a support platform 110, a detection unit 120, and a data processing unit; the support platform 110 is used to support the battery to be tested; the detection unit 120 is movably mounted on the support platform 110 and is used to collect position data of preset detection points on the surface of the battery to be tested; the data processing unit is communicatively connected to the detection unit 120 and is used to receive the data collected by the detection unit 120 and process the data.

[0042] In this embodiment, the support platform 110 is the basic structure of the entire device. The size of the support platform 110 can be designed according to the specifications of the battery under test. The detection unit 120 can be mounted on a motion mechanism, which can be a gantry structure, a cantilever structure, or a robotic arm, and moves in the X, Y, and Z directions through guide rails, lead screws, motors, and other structures. The data processing unit can be an industrial computer, an embedded system, or a cloud server. The data processing unit runs a data processing system internally, used to receive, store, calculate, analyze, and visualize the data collected by the detection unit 120. The data processing unit can also communicate with the charge-discharge tester to achieve synchronous control of the testing process.

[0043] The support platform 110 provides a stable foundation for the battery, the movable detection unit 120 enables flexible detection of multiple points on the battery surface, and the data processing unit completes data acquisition, storage, and calculation. The device has a compact structure and complete functions.

[0044] In optional embodiments of the present invention, such as Figure 2 As shown, the detection units 120 are configured in multiple ways, and at least one detection unit 120 is movable along the X direction on the support platform 110, at least one detection unit 120 is movable along the Y direction on the support platform 110, and at least one detection unit 120 is movable along the Z direction on the support platform 110.

[0045] By configuring multiple detection units 120, each moving and detecting in different directions, efficient parallel detection of three-dimensional deformation is achieved. At least one detection unit 120 moves along the X-axis, at least one detection unit 120 moves along the Y-axis, and at least one detection unit 120 moves along the Z-axis, ensuring that data in the three directions can be acquired simultaneously or rapidly, thus improving detection efficiency. Furthermore, the independent movement of multiple detection units 120 allows for independent optimization of movement speed and accuracy in each direction as needed.

[0046] In optional embodiments of the present invention, such as Figure 2 As shown, it also includes a drive mechanism 130 corresponding to the detection unit 120; the drive mechanism 130 is connected to the corresponding detection unit 120 in a transmission manner, and drives the corresponding detection unit 120 to move on the support platform 110.

[0047] The drive mechanism 130 can be driven by a servo motor and a ball screw, or by a linear motor. The mover is directly connected to the detection unit 120, and the stator is mounted on the guide rail. It has the characteristics of fast response and large acceleration. Alternatively, a stepper motor and a synchronous belt can be used. The stepper motor drives the synchronous belt pulley to rotate, and the synchronous belt drives the detection unit 120 to move. This method has a simple structure and low cost.

[0048] By setting a drive mechanism 130 corresponding to the detection unit 120, the automatic movement control of the detection unit 120 on the support platform 110 is realized, so that the movement of the detection unit 120 can be precisely controlled, ensuring the consistency and reliability of the detection process.

[0049] In optional embodiments of the present invention, such as Figure 2 As shown, it also includes a fixing fixture; the fixing fixture is set on the support platform 110 and is used to fix the battery to be tested.

[0050] By setting a fixing fixture, the battery under test is reliably fixed on the support platform 110, which effectively prevents the battery under test from shifting due to vibration, external force or its own expansion during the testing process. This ensures that the reference position and real-time position of all test points have the same reference benchmark, eliminating measurement errors caused by battery movement.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for detecting battery deformation, characterized in that, Including the following steps: Place the battery under test on the support platform; The detection unit collects the initial position data of preset detection points on the surface of the battery under test as reference position data. Perform charge and discharge tests on the battery under test; When the battery under test is charged and discharged, the detection unit is moved to the preset detection point to collect the real-time position data of the battery under test in the X, Y and Z directions. The collected real-time location data is compared with the reference location data to calculate the three-dimensional deformation of the battery under test in the X, Y and Z directions during the charging and discharging process.

2. The battery deformation detection method according to claim 1, characterized in that, The step of collecting the initial position data of the preset detection points on the surface of the battery under test as reference position data through the detection unit includes: The mobile detection unit moves sequentially to each preset detection point and collects the spatial coordinates or distance values ​​of each detection point in its initial state.

3. The battery deformation detection method according to claim 1, characterized in that, The step described above, during the charge-discharge test of the battery under test, involves moving the detection unit to a preset detection point and collecting real-time position data of the battery under test in the X, Y, and Z directions, including: During the charging and discharging process, the mobile detection unit repeatedly moves to each preset detection point according to a preset time interval or preset patrol path, and collects the real-time spatial coordinate value or distance value of each point during the test.

4. The battery deformation detection method according to claim 1, characterized in that, The step of comparing the collected real-time location data with the reference location data to calculate the three-dimensional deformation of the battery under test in the X, Y, and Z directions during the charging and discharging process includes: Calculate the differences between the real-time position data and the reference position data at the same preset detection point in the X, Y, and Z directions, and use these differences as the X, Y, and Z deformations of the battery under test at that preset detection point.

5. The battery deformation detection method according to claim 1, characterized in that, Before performing the charge-discharge test on the battery under test as described in the steps, the following steps are also included: Connect the positive and negative tabs of the battery under test to the testing device.

6. The battery deformation detection method according to claim 1, characterized in that, The step of placing the battery under test on the support platform includes: The battery under test is placed horizontally in the center of the support platform and fixed to the support platform by clamps.

7. A battery deformation detection device, characterized in that, The detection device is based on the battery deformation detection method according to any one of claims 1 to 6, and the battery deformation detection device includes: a support platform (110), a detection unit (120), and a data processing unit; The support platform (110) is used to support the battery under test; The detection unit (120) is movably mounted on the support platform (110) and is used to collect position data of preset detection points on the surface of the battery to be tested; The data processing unit is communicatively connected to the detection unit (120), and the data processing unit is used to receive and process the data collected by the detection unit (120).

8. The battery deformation detection device according to claim 7, characterized in that, The detection units (120) are configured in multiple ways, and at least one of the detection units (120) is movable along the X direction on the support platform (110), at least one of the detection units (120) is movable along the Y direction on the support platform (110), and at least one of the detection units (120) is movable along the Z direction on the support platform (110).

9. The battery deformation detection device according to claim 8, characterized in that, It also includes a drive mechanism (130) corresponding to the detection unit (120); The drive mechanism (130) is connected to the corresponding detection unit (120) and drives the corresponding detection unit (120) to move on the support platform (110).

10. The battery deformation detection device according to claim 7, characterized in that, It also includes fixing clamps; The fixing clamp is set on the support platform (110) and is used to fix the battery to be tested.

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