Aluminum-plastic film corner aluminum layer thickness testing method and cutting device thereof

Abstract

The invention provides an aluminum-plastic film corner aluminum layer thickness testing method and a cutting device thereof, and the aluminum-plastic film corner aluminum layer thickness testing method comprises the following steps: (1) marking a corner detection point of a to-be-tested aluminum-plastic film and a center line passing through the corner detection point, and shearing the corner of the to-be-tested aluminum-plastic film as a test sample; (2) fixing and cutting the test sample to obtain a cut sample; (3) testing the aluminum layer thickness of an angular position detection point of the cutting sample, comparing the aluminum layer thickness with the theoretical angular position aluminum layer thickness, and if the aluminum layer thickness of the angular position detection point is greater than the theoretical angular position aluminum layer thickness, returning the cutting sample as a test sample to the step (2) until the aluminum layer thickness of the angular position detection point is less than or equal to the theoretical angular position aluminum layer thickness; and (4) testing the thickness of the corner aluminum layer at a point near the corner detection point of the cutting sample in the step (3), and determining the thinnest point of the corner of the aluminum plastic film and the thickness of the corner aluminum layer of the aluminum plastic film. According to the test method provided by the invention, the accuracy of aluminum layer thickness measurement at the corner of the aluminum plastic film is further improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion power battery production, and in particular relates to a method for testing the thickness of an aluminum layer at the corner of an aluminum-plastic film and a cutting device thereof. Background technique [0002] As the new energy automobile industry has higher and higher energy density requirements for lithium-ion batteries, the structural design of pouch batteries is constantly pursuing the design requirements of large-size and thick batteries. In order to ensure the high-temperature and high-humidity storage and safety performance of batteries, hedging The thickness of the aluminum layer at the corner of the aluminum-plastic film after the pit puts forward higher requirements, so it is particularly important to accurately measure the thickness of the aluminum layer at the corner of the aluminum-plastic film after the pit. [0003] At present, the commonly used test method for the thickness ...

AI Technical Summary

Problems solved by technology

[0007] The sampling and testing methods of the aluminum-plastic film in the above-mentioned literature cannot maintain the original appearance of the corner of the aluminum-plastic film, cannot accurately determine the thinnest point of the thickness of the aluminum layer at the corner of the aluminum-plastic film after punching, and cannot accurately observe the thickness of the aluminum layer near the center line. The thickness of the aluminum layer changes at the point, which is easy to mislead the design and adjustment of the top angle of the punching die

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