Wide-breadth pole piece two-sided position-sleeving coating machine for power battery and supercapacitor

Abstract

The invention discloses a wide-breadth pole piece two-sided position-sleeving coating machine for a power battery and a supercapacitor. The coating machine comprises a control unit, an unwinding unit,a high-voltage discharge processing device, a front coating device, a lower drying tunnel, a back coating device, an upper drying tunnel and a winding unit, wherein the unwinding unit, the high-voltage discharge processing device, the front coating device, the lower drying tunnel, the back coating device, the upper drying tunnel and the winding unit are arranged in sequence along a movement direction of a metal foil; the high-voltage discharge processing device includes a high-voltage box body, a negative pressure ventilation device, a high-voltage source and a plurality of long-stripped discharge electrodes; the metal foil is wound on a high-voltage discharge roll; the discharge electrodes are arranged at a front end of an opening of the high-voltage box body, and are arranged at the periphery of the high-voltage discharge roll in parallel along an axial direction of the high-voltage discharge roll; a negative pressure air outlet is formed at a rear end of the high-voltage box body;and the air outlet communicates with the negative pressure ventilation device outside. According to the coating machine, based on core technologies such as high-voltage discharge surface processing, multi-stage tension control, segmental cascaded baking and material particle trowelling, the front and back coating for an aluminum foil and a copper foil whose breadth is 1.5m, working speed is 150m / min and position-sleeving precision is plus or minus 0.3mm are implemented.

Description

technical field [0001] The invention belongs to the technical field of power batteries and supercapacitors, and in particular relates to a pole piece double-sided positioning coating machine. Background technique [0002] Power batteries and supercapacitors are widely used in the field of new energy technology. In power batteries and supercapacitors, the pole piece of the electrode is a key component. Coating machines are usually required to evenly coat functional materials on metal foil (copper foil or aluminum foil) On the surface. The principle of a common coating machine is similar to a gravure printing machine. The rolled substrate is conveyed to the coating printing area through the transmission mechanism, and the functional material is coated on the designated position on the surface of the substrate, and then dried, wound, etc., used in the production of subsequent products. Among them, the thickness, uniformity, adhesion, width, position accuracy and coating speed...

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent "Lithium Battery Pole Coating Machine (201320299315.1)" discloses a lithium battery pole piece coating machine, which consists of a pole piece unwinding device, a tension adjusting device, a slurry coating device, a drying device and a collecting device. The existing problem is that the conventional coating machine scheme cannot achieve fast wide-width and double-sided coating, and the adhesion of functional materials to the metal foil is not strong, which affects the electrical parameters of the pole piece.

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