Tab flattening method of all-tab cylindrical lithium batteries

Abstract

The invention discloses a tab flattening method of all-tab cylindrical lithium batteries. The tab flattening method of the all-tab cylindrical lithium batteries mainly comprises the following steps: sleeving each all tab with a flattening sleeve; and therefore, making a flattening head get close to the flattening sleeve while rotating so that the flattening head can directly grind and act on the flattening sleeve after being in contact with the flattening sleeve, and driving the flattening sleeve to elastically deform so that grinding force can be conducted and act on the all tabs to complete flattening. According to the flattening method, the flattening head is not in direct contact with the all tabs, that is to say, the flattening head is not in direct contact friction with the all tabs, and thus the soft all tabs can be effectively prevented from being partially crushed, so that effects on the product quality are eliminated, and the qualification rate and the safety performance of products are better improved; and meanwhile, the flattening sleeve is made of a wear-resistant elastic deformation material so that the elasticity can be recovered after flattening of the all tabs is completed, and thus the working purpose of circular flattening can be achieved.

Description

technical field [0001] The invention relates to a method for flattening tabs, in particular to a method for flattening tabs of a cylindrical lithium battery with all tabs. Background technique [0002] At present, the production process of the all-tab cylindrical lithium battery involves the flattening of the full-tab of the wound cell. The traditional flattening method is to directly contact the flattened head of the kneading machine on the full-tab, and then As the flattening head rotates close to the full pole ear, it will be rolled to drive the full pole ear to rub flat on the end of the wound battery. In such a flattening method, since the flattening head directly contacts and rubs with the full pole ear, The soft full-tab part is often crushed, and the crushed particles will enter between the positive and negative terminals of the cylindrical lithium battery and cause a short circuit. It will also reduce the pass rate and safety performance of the product. Contents ...

AI Technical Summary

Problems solved by technology

[0002]At present, the manufacturing process of the all-tab cylindrical lithium battery will involve the full-tab flattening of the wound cell. The traditional flattening method is through The kneading head of the kneading machine is directly in contact with the all-pole ear, and then as the kneading head rotates close to the all-pole ear, it will be rolled and driven to knead the all-pole ear at the end of the winding battery core. In the flat method, due to the direct contact and friction of the flat head with the full tab, the soft full tab part is often crushed, and the crushed powder particles will enter between the positive or negative terminals of the cylindrical lithium battery and become A short circuit occurs, so the traditional kneading method has a great impact on the quality of the entire product, and will also reduce the pass rate and safety performance of the product

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