Laser thickness gauge calibration device and calibration method

Abstract

The invention relates to the technical field of battery production, and particularly discloses a laser thickness gauge calibration device and calibration method. According to the laser thickness gaugecalibration device provided by the invention, a plurality of tungsten steel sheets with different thicknesses can be placed on the laser thickness gauge calibration device for thickness data acquisition, the detection efficiency is improved, the tungsten steel sheets are used as standard parts to replace pole pieces, the detection precision is high, the tungsten steel sheets can be repeatedly used, and the detection cost is reduced. According to the laser thickness gauge calibration method, the tungsten steel sheet is used as a standard part to replace a pole piece, the thickness of the tungsten steel sheet is known, manual measurement of the thickness of the tungsten steel sheet is not needed, and measurement precision is improved. The tungsten steel sheet replaces a pole piece, cuttingis not needed in the calibration process, dust is reduced, and the environment is not polluted. Besides, the tungsten steel sheet is a standard part, can be repeatedly used, and replaces a non-reusable pole piece, so that the detection cost is reduced.

Description

technical field [0001] The invention relates to the technical field of battery production, in particular to a calibration device and a calibration method for a laser thickness gauge. Background technique [0002] In the lithium battery industry, the pole piece rolling process needs to be equipped with a laser online detector to monitor the thickness of the pole piece during the rolling process to ensure that the thickness of the produced pole piece is within the acceptable range. The impact of jitter and dust in the workshop environment will affect the test accuracy of the laser thickness gauge over time, so the thickness gauge needs to be calibrated and checked regularly. [0003] At present, the traditional method in the industry is to change the pressure of the rolling machine to press 5 to 7 groups of pole pieces with different thicknesses, and then the laser thickness gauge scans the thickness of the pole pieces online, and each group takes about 10 thickness data to ca...

AI Technical Summary

Problems solved by technology

[0004] The calibration method of the laser thickness gauge in the prior art has the following deficiencies: 1) When calibrating the negative electrode sheet, due to the nature of the negative electrode sheet itself, the rebound speed is very fast after being rolled, and the manual test results with a micrometer are very different from the equipment test results. Calibration is difficult, in the actual operation process may be due to R 2 ≤0.995, the calibration is unqualified and needs to be re-calibrated, which takes a long time and affects the production progress, and the accuracy of the calibration results is not accurate; 2) During the calibration process, a ceramic knife is required to cut the pole pieces from the equipment, which may easily cause dust to fall and pollute the environment ; 3) Calibration needs to consume more pole pieces, and the cost of calibration pole pieces will increase due to scrapping

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