Auxiliary tooling for punching laminated lithium-ion battery pole pieces and punching method

Abstract

The invention discloses an auxiliary tooling for punching laminated lithium-ion battery pole pieces and a punching method. The auxiliary tooling at least comprises a support base, a rolling shaft, a compression roller, a fixed bracket and an adjusting plate arranged on the fixed bracket, wherein the upper surface of the support base is a plane; the rolling shaft, the compression roller and the fixed bracket are arranged on the upper surface of the support base; center shafts of the rolling shaft and the compression roller are parallel to each other; the compression roller is located between the rolling shaft and the fixed bracket; the adjusting plate is parallel to the upper surface of the support base; the adjusting plate is provided with a photosensitive infrared sensor; at least two support legs are fixed on the lower surface of the adjusting plate; the length of each support leg is smaller than the distance between the lower surface of the adjusting plate and the upper surface of the support base; and an idler wheel is arranged at the lower end of each support leg. By adopting the technical scheme, the consistency of the punched pole pieces is improved; insecurity factors caused by materials on the pole pieces or foil exposure in subsequent procedures are avoided; the phenomenon of excessive materials on tabs or foil exposure of the punched pole pieces is basically completely eradicated; and the punching yield is greatly improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to an auxiliary tooling and a punching method for punching pole pieces of laminated lithium ion batteries. Background technique [0002] Laminated lithium-ion batteries must use special cutters to punch and cut electrodes that meet the battery size from the entire roll of electrodes. The electrode coating forms are divided into two forms: continuous coating and segmented coating. Now the invention is directed at how to improve the cutting precision of segmented coating form electrode and the product qualified rate. [0003] Existing punching and shearing equipment generally adopts a fixed-length form for punching the electrodes coated in sections, but due to errors in the coating process, errors in the driving motor, etc., it will cause the pole pieces and ear straps after punching to be cut. If the material or pole pieces are exposed to foil, the die-cutting pass rat...

AI Technical Summary

Problems solved by technology

Due to the difference in elongation between the material and the substrate, the electrodes produced by segmental coating will have poor surface flatness after the rolling process. The numerical deviation of such electrodes fed back to the photosensitive infrared sensor when passing through the sampling point If it is too large, it will cause the tab material to be too high or the exposed foil of the pole piece to be too large during punching and shearing.

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