Hot press molding method and hot press molding device for pole piece

Abstract

The invention provides a hot press forming method and device for a pole piece, and the method comprises the steps: S1, conveying the pole piece, and carrying out the rolling of the pole piece, so as to compact the pole piece; S2, respectively conveying a first diaphragm and a second diaphragm to the upper surface and the lower surface of the compacted pole piece; and S3, performing hot pressing on the first diaphragm, the second diaphragm and the pole piece into a whole. Therefore, the pole piece, the first diaphragm and the second diaphragm are hot-pressed into a whole, and the matching mode of the pole piece, the first diaphragm and the second diaphragm is simple and high in reliability. The pole piece, the first diaphragm and the second diaphragm which are pressed together are subjected to die cutting forming in the subsequent die cutting process, and when the pole piece is the negative pole piece, the negative pole piece, the first diaphragm, the second diaphragm and the positive pole piece which are formed and pressed together are assembled together in the assembling process, the assembling difficulty of the pole group can be reduced, and the assembling efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of battery production, in particular to a thermocompression molding method and thermocompression molding device for pole pieces. Background technique [0002] At present, two processes of stacking and winding are mainly used in the production of pole groups. [0003] In related technologies, the positive electrode, negative electrode, and diaphragm need to be assembled during the production process of the electrode group, and the distance between the positive electrode and the diaphragm and the distance between the negative electrode and the diaphragm need to be confirmed during the assembly process, resulting in low production efficiency. Low, in the process of stacking or winding, there is a certain gap between the positive electrode sheet and the diaphragm, the negative electrode sheet and the diaphragm, and foreign matter is easy to enter, resulting in a poor electrode group, and the diaphragm is easy to...

AI Technical Summary

Problems solved by technology

[0004] At the same time, when the pole group is formed, problems such as poor alignment and short circuit are detected, and the entire pole group will not be able to be used again, resulting in a large amount of loss

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