CN-122015686-A - Battery deformation detection method and battery deformation detection device

CN122015686ACN 122015686 ACN122015686 ACN 122015686ACN-122015686-A

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, the initial position data of the multiple points on the surface of the battery to be detected is collected to serve as a reference, and the real-time position data of the points are synchronously collected in the charging and discharging process, so that the three-dimensional deformation of the battery to be detected is comprehensively monitored. Compared with the prior art, the number and the positions of the detection points can be flexibly customized according to the requirements by moving the detection unit to the preset detection point positions, and deformation information of any position on the surface of the battery to be detected is obtained. The battery deformation detection method synchronously carries out deformation detection and charge and discharge test, can capture the coupling relation between deformation and electrochemical performance in real time, and provides data support for battery mechanism research and structure optimization.

Inventors

DUAN YUANKAI
KONG SHAOFENG
LI HAIYANG

Assignees

奇瑞汽车股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260325

Claims (10)

1. A battery deformation detection method, characterized by comprising the steps of: Placing a battery to be tested on a supporting platform; collecting position data of a battery surface to be detected in an initial state of a preset detection point through a detection unit as reference position data; Performing charge and discharge test on the battery to be tested; When the battery to be tested is subjected to charge and discharge testing, the detection unit is moved to a preset detection point, and real-time position data of the battery to be tested in the X direction, the Y direction and the Z direction are collected; comparing the acquired real-time position data with the reference position data, and calculating three-dimensional deformation amounts of the X direction, the Y direction and the Z direction of the battery to be tested in the charging and discharging process.
2. The method according to claim 1, wherein the step of collecting, by the detecting unit, position data in an initial state of a preset detecting point of the surface of the battery to be detected as the reference position data includes: the mobile detection unit sequentially reaches each preset detection point and collects the space coordinate value or the distance value of each detection point in the initial state.
3. The method for detecting battery deformation according to claim 1, wherein the step of moving the detecting unit to a predetermined detecting point when the battery to be detected is subjected to the charge and discharge test, and the step of collecting real-time position data of the battery to be detected in the X-direction, the Y-direction, and the Z-direction includes: the mobile detection unit repeatedly moves to each preset detection point according to a preset time interval or a preset round inspection path in the charging and discharging process, and acquires real-time space coordinate values or distance values of each point in the testing process.
4. The method for detecting battery deformation according to claim 1, wherein comparing the collected real-time position data with the reference position data to calculate the three-dimensional deformation amounts of the battery to be detected in the X-direction, the Y-direction and the Z-direction during the charge and discharge process comprises: And respectively calculating the difference values of the same preset detection point in the X direction, the Y direction and the Z direction between the real-time position data and the reference position data, and taking the difference values as the deformation amounts of the battery to be detected in the X direction, the Y direction and the Z direction of the preset detection point.
5. The method for detecting deformation of a battery according to claim 1, wherein before the step of performing the charge-discharge test on the battery to be detected, further comprises: And connecting the positive electrode lug and the negative electrode lug of the battery to be tested with the testing device.
6. The method of claim 1, wherein the placing the battery to be tested on the support platform comprises: And horizontally placing the battery to be tested in the center of the supporting platform, and fixing the battery to be tested on the supporting platform through the clamp.
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, comprising a support platform (110), a detection unit (120) and a data processing unit; The supporting platform (110) is used for bearing a battery to be tested; the detection unit (120) is movably arranged on the supporting platform (110) and is used for collecting position data of a preset detection point on the surface of the battery to be detected; The data processing unit is in communication connection with the detection unit (120), and is used for receiving and processing data acquired by the detection unit (120).
8. The battery deformation detection device according to claim 7, wherein the detection units (120) are configured in plurality, and at least one of the detection units (120) is movable in an X-direction on the support platform (110), at least one of the detection units (120) is movable in a Y-direction on the support platform (110), and at least one of the detection units (120) is movable in a Z-direction on the support platform (110).
9. The battery deformation detection device according to claim 8, further comprising a driving mechanism (130) corresponding to the detection unit (120); The driving mechanism (130) is in transmission connection with the corresponding detection unit (120) and drives the corresponding detection unit (120) to move on the supporting platform (110).
10. The battery deformation detection device according to claim 7, further comprising a fixing jig; The fixing clamp is arranged on the supporting platform (110) and is used for fixing the battery to be tested.

Description

Battery deformation detection method and battery deformation detection device Technical Field 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. Background Solid-state batteries are regarded as an important development direction for next-generation power batteries because of advantages such as high energy density, good safety, and the like. However, in the charge and discharge process of the solid-state battery, the volume change of the active material can cause three-dimensional deformation of the battery cell in the length, width and thickness directions, so that the use safety and the cycle life of the solid-state battery are affected. At present, external pressure is usually required to be applied to improve interface contact in solid-state battery testing, but a battery clamp can block detection vision, so that real-time measurement of three-dimensional deformation of the whole battery cell is difficult to realize. Disclosure of Invention The invention solves the problem that external pressure is usually applied to improve interface contact in the current solid-state battery test, but a battery clamp can block a detection sight, so that real-time measurement of the three-dimensional deformation of the whole battery cell is difficult to realize. (II) technical scheme In order to solve the technical problems, an aspect of the present invention provides a method for detecting deformation of a battery, including the steps of: Placing a battery to be tested on a supporting platform; collecting position data of a battery surface to be detected in an initial state of a preset detection point through a detection unit as reference position data; Performing charge and discharge test on the battery to be tested; When the battery to be tested is subjected to charge and discharge testing, the detection unit is moved to a preset detection point, and real-time position data of the battery to be tested in the X direction, the Y direction and the Z direction are collected; comparing the acquired real-time position data with the reference position data, and calculating three-dimensional deformation amounts of the X direction, the Y direction and the Z direction of the battery to be tested in the charging and discharging process. Optionally, the step of collecting, by the detection unit, the position data of the battery surface to be detected in the initial state of the preset detection point as the reference position data includes: the mobile detection unit sequentially reaches each preset detection point and collects the space coordinate value or the distance value of each detection point in the initial state. Optionally, when the battery to be tested performs the charge and discharge test, moving the detection unit to a preset detection point, and collecting real-time position data of the battery to be tested in the X direction, the Y direction and the Z direction includes: the mobile detection unit repeatedly moves to each preset detection point according to a preset time interval or a preset round inspection path in the charging and discharging process, and acquires real-time space coordinate values or distance values of each point in the testing process. Optionally, comparing the collected real-time position data with the reference position data, and calculating the three-dimensional deformation amounts of the battery to be measured in the X direction, the Y direction and the Z direction in the charging and discharging process includes: And respectively calculating the difference values of the same preset detection point in the X direction, the Y direction and the Z direction between the real-time position data and the reference position data, and taking the difference values as the deformation amounts of the battery to be detected in the X direction, the Y direction and the Z direction of the preset detection point. Optionally, before the step of performing the charge-discharge test on the battery to be tested, the method further includes: And connecting the positive electrode lug and the negative electrode lug of the battery to be tested with the testing device. Optionally, the placing the battery to be tested on the supporting platform includes: And horizontally placing the battery to be tested in the center of the supporting platform, and fixing the battery to be tested on the supporting platform through the clamp. The invention also provides a battery deformation detection device based on the battery deformation detection method, which comprises a supporting platform, a detection unit and a data processing unit, wherein the supporting platform is used for supporting the battery deformation detection device; The supporting platform is used for bearing a battery to be tested; the detection unit is movably arranged on the supporting platform and is used for collecting position data of a