Multi-pole laminated diaphragm cutting process and multi-pole laminated diaphragm cutting device

Abstract

The invention discloses a multi-pole laminated diaphragm cutting process. The process comprises the following process steps: laminating a bottom layer diaphragm; pressing a diaphragm; cutting off a diaphragm and stacking pole pieces; stacking a middle diaphragm; pressing a diaphragm; cutting off a diaphragm and stacking pole pieces; circularly laminating and cutting the diaphragm; laminating a top layer diaphragm; cutting off and pressing the diaphragm; integrally transferring; integrally cutting off the diaphragm layer; and performing CCD reinspection. The multi-pole laminated diaphragm cutting device comprises a lamination cutting-off mechanism and a pressing piece cutting-off mechanism which are arranged at a lamination station and a cutting-off station respectively, a platform and film pressing mechanisms are further arranged at the lamination station, and the film pressing mechanisms are correspondingly arranged on the two sides of the lamination platform. The lamination cutting-off mechanism is arranged above the lamination platform; and the pressing piece cutting-off mechanism is arranged above the platform. According to the invention, the multi-pole piece lamination is synchronized by pressing the diaphragm, the diaphragm is cut in a linkage manner, the lamination precision is ensured by pressing the diaphragm, the lamination efficiency is effectively improved by linking the lamination and the diaphragm cutting, the lamination and cutting linkage function is realized, and the cutting efficiency is improved while the cutting precision is ensured.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to a cutting process and device for a multi-pole laminated diaphragm in the field of lithium-ion power batteries. Background technique [0002] As the country vigorously promotes the development of new energy, the demand for lithium-ion power batteries in all walks of life is increasing day by day. In the composition structure of lithium-ion power batteries, the battery core is its core component. become. The structure of the battery cell includes multiple positive and negative plates stacked up and down staggered, and the positive and negative plates are isolated and insulated by a diaphragm. [0003] At present, the manufacturing process of the battery cell includes two methods of strip lamination and single-piece lamination according to the different diaphragm insertion process, that is, continuous diaphragm and single-piece diaphragm lamination are used for lamination. For...

AI Technical Summary

Problems solved by technology

However, in the unit body manufacturing process of this manufacturing process, the unit body is made using a blind stacking method, that is, the positive and negative electrodes are synchronously transported in a straight line and laminated, and the positive and negative electrodes arranged up and down lack alignment, which cannot To ensure the accuracy of the positive and negative electrodes in the unit, at the same time, the current situation is that if the alignment process is added to the positive and negative electrodes arranged above and below each piece, it will take the same time as the existing single-chip stacking process, and it will also consume a lot of time. Lamination efficiency cannot be guaranteed

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