A cell stacking method

Abstract

The invention relates to the technical field of power battery manufacturing, and discloses a battery cell stacking method, which uses a battery pole piece stacking device to stack battery pole pieces. The battery pole piece stacking equipment includes a heat sealing unit, a buffer unit, a stacking unit and a driving unit. The heat sealing unit is placed downstream of the feeding unit and is used to heat and press the battery pole pieces. The buffer unit is placed downstream of the heat sealing unit, and includes a buffer roller and a lift drive member, and the lift drive member can drive the buffer roller to rise or fall to reduce or increase the buffer length of the battery pole pieces. The lamination unit is placed downstream of the buffer unit and is used to fold the battery pole pieces. The lamination unit includes a turret mechanism and a lamination platform. The turret mechanism includes a turntable and clamping jaws. The clamping jaws can clamp the battery pole pieces, and the turntable can drive the clamps. The jaws rotate onto the lamination platform. The invention can adapt to the changing lamination speed and improve the quality and qualification rate of the electric core products.

Description

technical field [0001] The invention relates to the technical field of power battery manufacturing, in particular to a method for stacking battery cells. Background technique [0002] In the automotive industry environment 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. Square-stacked batteries are widely used, and the speed of stacking directly determines the production capacity of the entire line and the cost of cell manufacturing. At present, most of them use the z-type lamination technology. The fastest lamination speed in the world that has been mass-produced is 0.6s / piece. The lamination speed of this lamination method is relatively slow, resulting in a large demand for equipment, a large floor space, and a large acquisition cos...

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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