Double-roller compaction equipment of battery pole piece and compaction method for battery pole piece

Abstract

The invention relates to double-roller compaction equipment for a battery pole piece and a compaction method for the battery pole piece, and belongs to the technical field of lithium ion batteries. The invention mainly solves the problem that after the current battery pole piece is compacted, wrinkles are generated between a coating part and a non-coating part, so that the subsequent production of a battery is very unfavorable. The equipment is mainly characterized by comprising paired compression rollers and a filling belt auxiliary device, and the filling belt auxiliary device comprises filling belts and a filling belt winding and unwinding mechanism which are distributed between the paired compression rollers at intervals. According to the invention, when the battery pole piece with a plurality of coating parts and non-coating parts in the width direction is rolled, wrinkles at the boundaries of the coating parts and the non-coating parts can be inhibited. The double-roller compaction equipment has the characteristics that when the battery pole piece passes through the paired compression rollers, the coated part and the uncoated part are simultaneously pressed and extend, so that the uncoated part does not generate wrinkles, and the compaction device is mainly used for compacting the battery pole piece of the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a roller compaction device for compacting battery pole pieces and a compacting method for battery pole pieces. Background technique [0002] In recent years, with the expansion of the application of lithium-ion batteries, the demand for lithium-ion batteries has also increased. In order to improve the production efficiency of lithium-ion batteries, a plurality of active material coating parts (hereinafter referred to as coating parts 5) are formed at intervals in the width direction of the battery pole piece, such as figure 2 As shown, the manufacturing method of forming multiple pole pieces after being compacted (compressed by a pair of rollers) longitudinally has become the mainstream. [0003] However, when compacting a pole piece in which a plurality of coating portions 5 are formed at intervals in the width direction, the thickness of the coating portion 5 of ...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of roller compaction equipment for battery pole pieces and a compaction method for battery pole pieces, so as to solve the problems caused by the wrinkles between the coated part and the uncoated part in the above-mentioned background technology. Subsequent production very unfavorable problems

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