Battery pole piece laminating equipment and battery cell laminating method

Abstract

The invention relates to the technical field of power battery manufacturing, and discloses battery pole piece laminating equipment and a battery cell laminating method, a battery pole piece comprises a positive pole piece, a negative pole piece and a diaphragm strip material, and the positive pole piece and the negative pole piece are correspondingly arranged on two sides of the diaphragm strip material. The battery pole piece laminating equipment comprises a heat sealing unit, a buffering unit, a laminating unit and a driving unit. And the heat sealing unit is arranged at the downstream of the feeding unit and is used for heating and pressing the battery pole piece. The buffering unit is arranged at the downstream of the heat sealing unit and comprises a buffering roller and a lifting driving piece, and the lifting driving piece can drive the buffering roller to ascend or descend so as to reduce or increase the buffer length of the battery pole piece. The lamination unit is arranged at the downstream of the buffering unit and is used for folding the battery pole piece, the lamination unit comprises a turret mechanism and a lamination platform, the turret mechanism comprises a turntable and a clamping jaw, the clamping jaw can clamp the battery pole piece, and the turntable can drive the clamping jaw to rotate to the lamination platform. The battery pole piece laminating equipment can adapt to the changed lamination speed, and the quality and the qualification rate of battery cell products are improved.

Description

technical field [0001] The invention relates to the technical field of power battery manufacturing, in particular to a battery pole sheet stacking device and a cell stacking method. Background technique [0002] In the environment of the automobile industry that uses traditional energy as power supply, the problem of environmental pollution is becoming more and more serious. Actively developing new energy vehicles can reduce the harm to the environment. Lithium-ion device technology is a key technology for the development of electric vehicles. Batteries with square laminates are widely used, and the speed of lamination directly determines the production capacity of the whole line and the manufacturing cost of batteries. At present, most of them use z-type lamination technology. The world’s fastest lamination speed that has been mass-produced is 0.6s / piece. Using this lamination method is relatively slow, resulting in a large demand for equipment, a large footprint, and a hi...

AI Technical Summary

Problems solved by technology

However, the battery pole piece enters the heat-sealing mechanism to form an integrated battery pole piece after passing through the feeding unit. The movement speed at the heat-sealing mechanism is uniform, while the lamination speed of the lamination unit downstream of the heat-sealing mechanism is variable. The different speeds cause the lamination unit The claws are easy to pull the separator tape of the battery pole piece, so that the insulation between the pole pieces cannot be guaranteed, and the qualified rate of the battery product is reduced.

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