Die cutting die of battery pole piece and die cutting method thereof

Abstract

The invention relates to the processing field of battery pole pieces, in particular to a die cutting die of a battery pole piece and a die cutting method thereof. The die cutting die of the battery pole piece comprises an upper die fixing plate, a lower die fixing plate, an upper die plate, a lower die plate and four guide pillars, wherein the upper die fixing plate and the lower die fixing plate can move back and forth along the directions, facing the lower die plate, of the guide pillars and the directions, away from the lower die plate, of the guide pillars; a front edge part cutter and a rear edge part cutter for cutting the edge part of the pole piece are arranged at the bottoms of two ends of the upper die plate respectively, and a lug cutter for cutting lugs of the pole piece is arranged at the bottom of the center of the upper die plate; the lug cutter comprises edge parts positioned at two ends, a hollowed-out part positioned between the two edge parts, a connecting part positioned on the top of the hollowed-out part and connected to the tops of the two edge parts, and extending parts extending in the directions from the bottoms of the edge parts to the direction away from the hollowed-out part, the edge parts, the hollowed-out part, the connecting part and the extending parts form a shape like a Chinese character ''Ji'', and the shape of the hollowed-out part is matched with the shapes of the lugs. The die is high in die cutting efficiency and high in resource utilization rate.

Description

technical field [0001] The invention relates to the field of battery pole piece processing, in particular to a battery pole piece die-cutting die and a die-cutting method thereof. Background technique [0002] Lithium-ion battery is a new generation of green high-energy battery with excellent performance, and has become one of the focuses of high-tech development. Lithium-ion batteries have the following characteristics: high voltage, high capacity, low consumption, no memory effect, no pollution, small size, small internal resistance, less self-discharge, and more cycles. Because of the above-mentioned characteristics, lithium-ion batteries have been applied to many civilian and military fields such as mobile phones, notebook computers, video cameras, and digital cameras. [0003] As an important part of the lithium battery, the pole piece plays a vital role in the performance of the battery. The pole piece is made by coating the pole powder material on both sides of the ...

AI Technical Summary

Problems solved by technology

[0004] In the pole piece die-cutting of the prior art, since the coating area is in the center of the base material, one piece of pole piece is obtained by one die-cutting during die-cutting, and the die-cutting efficiency is low, and the blank areas on both sides of the coating area are not used as pole pieces. The parts outside the ear become waste, more waste is generated, and the utilization rate of the base material is low

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