Lithium ion laminated battery manufacturing device and manufacturing method

Abstract

The invention discloses a lithium ion laminated battery manufacturing device and manufacturing method. The device comprises a pole piece cutting and piling mechanism, a hot-press rolling wheel, a unit feeding mechanism and a unit piling mechanism which are sequentially arranged, wherein the unit piling mechanism piles four-layer units to preset layers; after a raw material strap is formed into a laminated material strap by the pole piece cutting and piling mechanism, the laminated material strap is conveyed to the hot-press rolling wheel and subjected to thermal compounding by the hot-press rolling wheel to form a unit material strap, then the unit material strap is conveyed to the unit feeding mechanism, and the unit feeding mechanism cuts the unit material strap into the four-layer units and conveys the four-layer units to the unit piling mechanism. According to the device, the cutting, laminating, hot pressing and diaphragm cutting processes of the four-layer units can be conveniently achieved, the piling mode of the four-layer units is simple and efficient, pressing and piling can be conducted simultaneously, and the piling and positioning precision is high; by means of cyclic utilization of multiple piling work stations, piling waiting time cannot be generated, and the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a manufacturing device and method for lithium-ion laminated batteries. Background technique [0002] At present, lithium-ion battery cells mainly adopt two processes of winding and stacking. Since the cross-section of the winding type cell is circular or oval, the expansion and contraction of the electrode will cause the gap between the electrodes during the charging and discharging of the battery. The gap between them is not uniform, and the electrode active material is easy to fall off at the bend, which will lead to uneven internal reaction, which will directly cause the performance of the battery to decline. At the same time, there are also disadvantages such as long pole pieces, large internal resistance of the battery, which are not conducive to high-rate charge and discharge, low specific power, and low space utilization. [0003] Compared with the tradition...

AI Technical Summary

Problems solved by technology

Both the stacking method and the four-layer unit stacking method require multiple manipulators to work together, but because the diaphragm or pole piece is a flexible body, it is not easy to grasp, and the positioning accuracy during placement is difficult to guarantee

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