Production process for avoiding reverse lamination of battery cell laminations

Abstract

The invention discloses a production process for avoiding reverse lamination of battery cell laminations. The production process comprises the following steps: step 1, respectively cutting a positive plate and a negative plate once to obtain a positive plate with a positive welding blank area and a negative plate with a negative welding blank area, the sizes of the positive electrode welding blank area and the negative electrode welding blank area being different; and step 2, respectively laminating the positive plate and the negative plate which are cut for the first time, determining whether the lamination is abnormal or not, if not, cutting the positive welding blank area and the negative welding blank area for the second time again, enabling the sizes of the positive welding blank area and the negative welding blank area to be the same, and then welding a pole lug. According to the invention, the battery cells can be visually picked out after lamination, so that defective products are prevented from flowing out, the phenomenon of battery cell combustion is avoided, and the safety coefficient of products is improved.

Description

technical field [0001] The invention belongs to the technical field of electric cores, and in particular relates to a production process for avoiding reverse stacking of electric core stacks. Background technique [0002] Nowadays, with the progress and development of society and technology, countries are vigorously developing green and high-efficiency secondary batteries. As a new type of secondary battery, lithium-ion batteries have the advantages of high energy density, large output power, high average output voltage, environmental friendliness, long cycle life, and good safety performance. People also use lithium-ion secondary batteries more and more widely. [0003] Lithium-ion rechargeable batteries consist of cells and protective circuit boards. When the battery core is stacked, the pole piece will be die-cut according to the size of the battery core before stacking. The pole piece after die-cutting is mainly the foil material in the welding area of ​​the main pole ...

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the related technology, the purpose of this application is to provide a production process that avoids stacking of stacked cells, which solves the problem of pole pieces that are prone to appear due to manual feeding and stacking / equipment failure in the prior art. Lamination reverse / duplicate phenomenon, due to the same blank width / height of positive and negative pole pieces, too many layers of battery stacks, employees cannot visually identify defects, and defective products are easy to flow out, resulting in combustion of batteries after formation and charging Phenomenon, the technical problem that caused a major safety accident, realized the beneficial effect of intuitively picking out the laminated and reversed cells, avoiding the outflow of defective products, avoiding the phenomenon of cell burning, and improving the safety factor of the product

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