Lithium ion battery negative pole copper foil production equipment and method

Abstract

The invention discloses lithium ion battery negative pole copper foil production equipment and method. PET films containing nanometer copper layers are unwound from an unwinding mechanism to enter anelectroplating tank B for electroplating to enter an electroplating tank C, are continuously electroplated by all stages of electroplating tanks D-I, are fed in a water washing tank for water washing,are dried in first drying equipment after water extrusion, are passivated in a passivating tank, are dried, and are finally wound by a winding mechanism. Ultrathin copper foils produced by the production equipment and method effectively reduce the weight of lithium ion batteries, provide light negative pole materials for realization of 300 Wh / kg power battery specific energy, meanwhile, solve thedefects of existing domestic technologies and equipment, and fill up the blank in domestic production field of ultrathin copper foils. In addition, the ultrathin electrolytic copper foil production method and equipment replace expensive and huge negative pole roller equipment in the electrolytic copper foil production, reduce the enterprise production cost, and are easier to operate and convenient for large-scale enterprise production.

Description

technical field [0001] The invention relates to the technical field of electrolytic copper foil production, in particular to a production equipment and method for negative electrode copper foil of a lithium ion battery. Background technique [0002] The existing production process of an all-in-one machine for producing copper foil for lithium-ion batteries is as follows: sequentially go through cathode roll-pickling-washing-peeling-drying-passivation treatment-drying-winding. This method generally has the following problems: [0003] (1) Due to the limitations of the cathode roller and the control system, the thinnest copper foil produced is 6 μm, and it is difficult to produce copper foil of 6 μm or less, with a unit weight of 54-88g / m 2 . [0004] (2) The problem of edge tearing often occurs, and the electric shock problem of the cathode roller caused by edge tearing. [0005] (3) Quality problems such as folds, spiral patterns, and black spots often occur, and the yield...

AI Technical Summary

Problems solved by technology

[0003] (1) Due to the limitations of the cathode roller and the control system, the thinnest copper foil produced is 6 μm, and it is difficult to produce copper foil of 6 μm or less, with a unit weight of 54-88g / m 2

[0004] (2) The problem of edge tearing often occurs, and the electric shock problem of the cathode roller caused by edge tearing

[0005] (3) There are often quality problems such as folds, spiral patterns, and black spots, and the yield is low

[0006] (4) The size of the cathode roller is fixed, if the size is not well matched during cutting, the yield will be reduced

[0007] (5) The tensile strength and ductility of lithium battery copper foil are poor, and it is difficult to meet the needs of fast charging high-end lithium-ion batteries

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