Lamination process for novel battery pole pieces

Abstract

The invention discloses a lamination process for novel battery pole pieces. A plurality of pole piece clamps clamp pole pieces and a separation film and cyclically transfer the same to a lamination station to form a laminated battery core on the lamination station. Since the pole pieces are simultaneously attached to both sides of the separation film, and then are laminated at the lamination station, the lamination efficiency is improved and the production efficiency of the battery cell is greatly improved. During the lamination process, the separation film is laminated simultaneously with the positive and negative pole pieces, and is moved to the lamination station under the effect of the pole piece clamps so that no tension is generated between the separation film and the positive and negative pole pieces. The jaws of the pole piece clamps and a pole piece pressure plate on a lamination table are only in contact with the same pole piece (positive or negative pole piece), the positive and negative pole pieces are not infected, the laminated piece has good stability, high repeatability, and the product quality is improved.

Description

technical field [0001] The invention relates to a battery production process, and more specifically refers to a new type of battery pole sheet lamination process. Background technique [0002] At present, in the lithium battery manufacturing industry, there is a battery manufacturing method that is realized by lamination manufacturing process. Its working principle is to put the positive and negative electrode pieces 4 into the material box 1, and the electrode piece picking mechanism 2 reciprocates left and right to pick up the electrode pieces in the positive and negative material boxes. After secondary positioning, the positive and negative electrode pieces are placed alternately. On the stacking table 3; the stacking table 3 (moving mechanism 6) drives the isolation film 5 to reciprocate left and right to form a zigzag stack. When the number of stacked sheets reaches the set value, the cell transfer mechanism transfers the pole piece group to the winding separator stati...

AI Technical Summary

Problems solved by technology

[0003] This kind of equipment in the prior art can only stack one cell pole piece at a time, and the lamination speed can only be between 1.0-1.5S / pcs according to the size of the pole piece, plus the auxiliary time of the isolation film (about 5 to 10 seconds) is long, it is difficult to achieve a higher lamination efficiency breakthrough, and the efficiency is too low; and the lamination table moves back and forth between the positive and negative electrodes, driving the isolation film to move back and forth, making the isolation film easy to generate tension

In addition, the pole piece pressing plate on the stacking platform alternately presses the positive and negative pole pieces, which is easy to cause mutual infection between the positive and negative pole pieces.

With the rapid development of production demand, the production efficiency of the existing technology stacking machine is really difficult to meet the market demand

Images