Cell alignment degree detection method, system, device and apparatus

Abstract

The invention relates to a cell alignment degree detection method, system, device and apparatus. The method comprises the following steps: acquiring a first image acquired when negative plates are stacked, wherein the first image carries first image data of the negative plates, a diaphragm and a reference object; extracting the negative plate, the diaphragm and the side boundary of the reference object from the first image data to obtain the distance between the negative plate and the side boundary of the reference object and the alignment degree of the negative plate and the diaphragm; obtaining a second image collected when the positive plates are stacked, the second image carrying image data of the positive plates and the reference object, extracting side lines of the positive plates and the reference object from the second image data to acquire a distance between the positive plates and the side lines of the reference object; and obtaining the alignment degree of the negative plateand the positive plate according to the distance between the negative plate and the side line of the reference object and the distance between the positive plate and the side line of the reference object so as to obtain a cell alignment degree detection result. Real-time detection of the cell alignment degree in the lamination process is realized, and the detection accuracy is improved.

Description

technical field [0001] The present application relates to the technical field of detection, in particular to a method, system, device and equipment for detecting alignment of cells. Background technique [0002] The zigzag lamination process is a process in which the lamination and the diaphragm cover the pole piece through the left and right movement of the lamination table. For safety reasons, the separator in the lithium battery needs to completely cover the negative electrode sheet, and the negative electrode sheet needs to completely cover the positive electrode sheet. Lithium battery manufacturers set a process requirement parameter range for the alignment between the separator and the negative electrode sheet, and between the negative electrode sheet and the positive electrode sheet. [0003] Zigzag-based lamination manufacturing equipment often relies on visual inspection technology to detect cell alignment data, and judge cell quality based on the detection data. ...

AI Technical Summary

Problems solved by technology

However, this method can only detect the alignment of the positive and negative electrodes, and cannot detect the distance between the diaphragm and the negative electrode.

In addition, the X-ray detection technology must be installed on the equipment that provides X-rays to measure the alignment of the entire cell, so it is impossible to realize real-time detection of the alignment of the cell during the stacking process

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