PET film double-sided rapid coating and coating equipment

Abstract

The invention discloses a PET film double-sided rapid coating and coating equipment. The equipment comprises an unwinding mechanism for conveying a PET film in a first direction, a first coating mechanism, a first drying and calendering mechanism, a reversing mechanism which is used for overturning the front and back surfaces of the PET film, a second film coating mechanism which is the same as the first film coating mechanism in structure and is arranged right above the first drying and calendering mechanism, a second drying and calendering mechanism which is the same as the first drying andcalendering mechanism in structure, and a winding mechanism which is used for recycling the PET film in a second direction. According to the invention, a plurality of vacuum cavities are arranged, themechanisms are respectively arranged in respective cavities to enable the PET film of a battery pole piece to pass through all the mechanisms in sequence, the processing and forming of the aluminum film and the copper film and the functions of coating the positive electrode material and the negative electrode material are completed at one time, and the processing of the cathode metal electrode, the cathode material, the anode metal electrode and the anode material of the battery can be completed in one unwinding and winding process, so that the production process of the lithium ion battery issimplified, the production efficiency is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of vacuum magnetron sputtering film coating, and more specifically relates to a PET film double-sided fast film coating and coating equipment. Background technique [0002] Copper foil and aluminum foil are selected as the main materials for lithium battery electrode current collectors because of their good electrical conductivity, soft texture, and relatively low price. At present, the preparation method of copper foil and aluminum foil often adopts calendering method. Although the copper foil and aluminum foil obtained by the calendering method have good ductility, they have disadvantages such as complex production process, large limit thickness, and width limited by the length of the roll. [0003] The production process of the existing lithium-ion battery is to coat the negative electrode material and the positive electrode material on the copper foil and the aluminum foil respectively, and complete thr...

AI Technical Summary

Problems solved by technology

Although the copper foil and aluminum foil obtained by the calendering method have good ductility, they have disadvantages such as complex production process, large limit thickness, and width limited by the length of the roll.

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