Discharging pre-pressing device and battery cell winding machine

Abstract

The invention discloses a discharging pre-pressing device and a battery cell winding machine, and relates to the technical field of battery cell production. The discharging pre-pressing device comprises a first supporting mechanism, a second supporting mechanism and two clamping mechanisms. The clamping mechanism comprises an inner clamping needle, the inner clamping needle penetrates through a battery cell, and the first supporting mechanism and the second supporting mechanism are oppositely arranged at the two ends of the inner clamping needle. A first supporting base and a second supporting base are oppositely connected to the two sides of a bidirectional displacement assembly, the first supporting base is used for abutting against one inner clamping needle, and the second supporting base is used for abutting against the other inner clamping needle. The bidirectional displacement assembly is used for driving the first supporting base and the second supporting base to get away from each other so as to push the two inner clamping needles to get away from each other. According to the discharging pre-pressing device, the inner clamping needle can be prevented from inclining and deforming, a pole piece and a diaphragm of an inner ring of the battery cell are prevented from wrinkling, a corner gap of the battery cell is reduced, the uniformity of the corner gap is improved, and the quality of the battery cell is guaranteed.

Description

technical field [0001] The invention relates to the technical field of electric core production, in particular to a blanking and preloading device and an electric core winding machine. Background technique [0002] At present, in the production process of power lithium batteries, the pre-pressing and forming of battery cells is an important part of the battery winding process. However, most of the current battery winding machines use cantilever-type inner clamping needles to clamp and unload the battery cells and pull them outward to facilitate the pre-pressing process. But in this way, the length of the cantilever-type inner clip pin is longer, and it is prone to tilt and deformation due to insufficient rigidity when applying tension to the battery cell, which will cause the pole piece and diaphragm of the inner ring of the battery core to wrinkle, and will cause the battery core to be damaged. The corner gap is too large, the corner gap is uneven and other problems, which...

AI Technical Summary

Problems solved by technology

But in this way, the length of the cantilever-type inner clip needle is longer, and it is prone to tilt and deformation due to insufficient rigidity when applying a pulling force to the battery cell, which will cause the pole piece and diaphragm of the inner ring of the battery core to wrinkle, and will cause the battery core to be damaged. The corner gap is too large, the corner gap is uneven, etc., which affect the production quality of the battery cell and reduce the yield

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