Battery cell blanking clamping mechanism

Abstract

The embodiment of the invention provides a battery cell blanking clamping mechanism, and relates to the field of lithium battery manufacturing equipment. The battery cell blanking clamping mechanism comprises an inner side clamping plate, an outer side clamping plate and a clamping driving mechanism, wherein the inner side clamping plate and the outer side clamping plate are oppositely arranged; the clamping driving mechanism is simultaneously in transmission connection with the inner side clamping plate and the outer side clamping plate and is used for driving the inner side clamping plate and the outer side clamping plate to be mutually close to each other or mutually separated; and the cross sections of the inner side clamping plate and the outer side clamping plate are rectangular. Through the adoption of the inner side clamping plate and the outer side clamping plate of rectangular and plate-shaped structures, the occupied space of the clamping plates is smaller; the probability of battery cell inner side collapse is reduced; meanwhile, the clamping plates are more stable when being stressed in the horizontal direction; deformation cannot easily occur, so that the deformationand wrinkling of the battery cell can be avoided; the contact area between the clamping plates and the battery cell is smaller; the clamping force is greater; the clamping effect is good; and the corepulling risk due to driving of an inner layer diaphragm during the needle coiling and needle pulling can be reduced.

Description

technical field [0001] The invention relates to the field of lithium battery manufacturing equipment, in particular, to a blanking and clamping mechanism for battery cells. Background technique [0002] At present, in the production process of power lithium battery, the positive and negative electrode sheets and the separator are mainly formed by the winding machine to form the battery core. After the battery core is wound on the winding needle, the clamping mechanism is usually used to unload; The tightening mechanism usually clamps the cell through the inner and outer pinch rollers, and the winding needle is pulled back to realize the blanking. And the current cell blanking clamping mechanism has the following problems: 1. The clamping roller is cylindrical, which occupies a large space in the circumferential direction of the winding needle, and the inner diaphragm pole piece is easy to collapse during the cell winding and blanking process; 2. The clamping roller It is ea...

AI Technical Summary

Problems solved by technology

Moreover, the current clamping mechanism for cell blanking has the following problems: 1. The clamping roller is cylindrical, which occupies a large space in the circumferential direction of the needle, and the inner diaphragm pole piece is easy to collapse during the process of cell winding and blanking; 2. The clamping roller Deformation and breakage are prone to occur in the direction of force, causing one end to not be clamped tightly, and the inner side of the cell is easy to wrinkle during pre-pressing; 3. The contact area between the clamping roller and the arc surface of the cell is large, and the clamping force per unit area is small. When the needle is pulled back, it is easy to drive the inner diaphragm, causing the battery core to be scrapped

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