Lithium battery plastic coating device

Abstract

The invention discloses a lithium battery plastic coating device which comprises a base, wherein a film supply mechanism, a film cutting mechanism, a film coating working table, a feeding mechanism and a discharging mechanism are arranged on the base; the film supply mechanism is provided with two rotary tables for placing winding film; a tensioning wheel and a squeezing part for pre-expanding the flat winding film are sequentially arranged on a film releasing path corresponding to each rotary table; the film cutting mechanism is arranged on the film releasing path and is provided with a film pulling component for pulling the winding film and a cutter for cutting the film off; a film absorbing component pulled out by the winding film and a pushing cylinder for pushing a lithium battery subjected to film coating out are arranged on the film coating working table; the feeding mechanism is provided with a feeding channel for conveying lithium batteries in a single row, and an air cylinder capable of pushing the lithium battery into the pull-out winding film is arranged at the end part of the feeding channel; the discharging mechanism is provided with a discharging channel for receiving the lithium batteries pushed out by the pushing cylinder; leveling clamp plates for adjusting positions of the lithium batteries in the film are arranged on the two sides of the discharging channel; an elastic pressing plate for acting on the lithium batteries is arranged at the end part of the discharging channel. The lithium battery plastic coating device is high in film coating speed and quality.

Description

technical field [0001] The invention relates to the field of lithium battery production and manufacturing, in particular to a lithium battery plastic packaging equipment. Background technique [0002] Lithium batteries usually come in two shapes: cylindrical and square. The inside of the battery adopts a spiral wound structure, and a very fine and highly permeable polyethylene film separator material is used to space the positive and negative electrodes. The positive electrode includes a current collector composed of lithium cobalt oxide (or lithium nickel cobalt manganate, lithium manganate, lithium iron phosphate, etc.) and aluminum foil. The negative electrode consists of a current collector composed of graphitized carbon material and copper foil. The battery is filled with an organic electrolyte solution. In addition, a safety valve and a PTC element (partial cylindrical use) are installed to protect the battery from damage when the battery is in an abnormal state and...

AI Technical Summary

Problems solved by technology

[0005] There are many problems in the use of the existing coating equipment, such as: the film unwinding speed of the diaphragm unwinding mechanism is slow; the film tape is flat after cutting, and it is difficult to push the battery into the film tape; The location of the battery is uneven, resulting in inconsistent lengths of the coating at both ends of the battery cell; the coated lithium battery is discharged from the discharge channel, and is next to the conveyor belt that rolls down to the drying tunnel, and the film shrinkage film is bonded together, causing the film shrinkage to fail. Affect the coating quality of lithium batteries

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