Diaphragm gluing and drying device for lithium battery pole piece lamination

Abstract

The invention discloses a diaphragm gluing and drying device for lithium battery pole piece lamination. The diaphragm gluing and drying device is used for attachment and fixing to a pole piece output by a pole piece unwinding mechanism. The diaphragm gluing and drying device is characterized in that the diaphragm gluing and drying device comprises a diaphragm unwinding mechanism for unwinding a diaphragm, a coating mechanism for coating the diaphragm and a drying mechanism for drying the coated diaphragm; and the diaphragm output by the diaphragm unwinding mechanism enters the drying mechanism through the coating end of the coating mechanism, and the diaphragm output by the drying mechanism is attached to the pole piece output by the pole piece unwinding mechanism. By controlling unwinding of the pole piece unwinding mechanism and the diaphragm unwinding mechanism, pole piece structures of different combination forms are obtained, the pole piece thermal compounding yield and consistency are improved, process scrapping caused by poor pole piece compounding is reduced, and then the safety risk of a battery cell and the manufacturing cost of a product are reduced.

Description

technical field [0001] The invention relates to the technical field of lithium battery preparation, in particular to a diaphragm coating and drying device for lithium battery pole piece stacks. Background technique [0002] Lithium-ion batteries are widely used in the field of new energy vehicles because of their high energy density and environmental friendliness. Product consistency and first-time product yield in the lithium battery manufacturing process affect product performance and product manufacturing costs. The lamination process is an important process in the production process of soft-pack lithium batteries. The preparation yield and stacking yield of the unit sheet directly affect the material consumption of the process; at the same time, the thermal compound consistency of the unit sheet will also affect the stacked core after lamination Product consistency affects the wetting effect of the battery cell and the morphology of the charge-discharge interface of the...

AI Technical Summary

Problems solved by technology

Product consistency and first-time product yield in the lithium battery manufacturing process affect product performance and product manufacturing costs

The lamination process is an important process in the production process of soft-pack lithium batteries. The preparation yield and stacking yield of the unit sheet directly affect the material consumption of the process; at the same time, the thermal compound consistency of the unit sheet will also affect the stacked core after lamination Product consistency affects the wetting effect of the battery cell and the morphology of the charge-discharge interface of the pole piece, which in turn affects the long-term cycle performance of the battery

[0003] However, the glue-coated diaphragm coating used in the thermal lamination process has a significant negative impact on the liquid injection and saturation of the battery cell. How to reduce the amount of diaphragm coating while ensuring the effect of thermal lamination and stacking cores has become an important issue for lithium battery developers and researchers. Issues that manufacturers focus on

Images