Die cutting mechanism with pole piece corner cutting, system comprising die cutting mechanism and method

Abstract

The invention relates to the technical field of pole piece die cutting, in particular to a die cutting mechanism with pole piece corner cutting, a system comprising the die cutting mechanism and a method. The die cutting mechanism comprises a tab cutting mould, a regulating mechanism and a corner cutting mould, wherein the tab cutting mould is used for cutting out a tab for a pole piece; the regulating mechanism is used for regulating the tab cutting mould to adapt different sizes of pole pieces to cut out the tabs; and the corner cutting mould is arranged on one side of the tab cutting mouldand is used for cutting the corner of the pole piece with the tab. The regulating mechanism comprises at least one groups of X regulating modules and Y regulating modules regulated and transmitted tothe X regulating modules. The tab cutting mould is connected with a driving component and a support used for fixedly installing the driving component, and the support is arranged at the Y regulating modules. The moulds of the die cutting mechanism have certain universality, the die cutting mechanism can die-cut out different sizes of pole pieces by only needing to store the same two kinds of moulds, and the storage amount and the cost of the moulds are reduced. The mould becomes smaller after being separated, the difficulty in mould processing is reduced, and the service life of the mould is long.

Description

technical field [0001] The invention relates to the technical field of pole piece die-cutting, in particular to a die-cutting mechanism with pole piece corner cutting and a system and method including the same. Background technique [0002] Lithium-ion battery is an ideal chemical energy source, which has the advantages of small size, high voltage, high specific energy, long charge and discharge life, no memory effect, little environmental pollution, fast charging, and low self-discharge rate. Batteries have been applied to many civilian and military fields such as mobile phones, notebook computers, video cameras, and digital cameras. However, battery safety and consistency issues have always been key factors in the promotion of the lithium battery market. The formation of these two problems is often related to the quality of the pole piece. [0003] As an important part of the lithium battery, the pole piece plays a vital role in the performance of the battery. The produ...

AI Technical Summary

Problems solved by technology

However, battery safety and consistency issues have always been key factors in the promotion of lithium batteries

When the cutting precision of the pole piece is not high, the consistency of the battery will be poor. When there are many burrs and ash in the pole piece, the battery is prone to self-discharge or even short circuit, causing the battery to heat up or even explode.

[0004] Therefore, it is necessary to trim the acute angle position of the pole piece after the die-cutting of the pole piece is completed. In the prior art, a set of molds are used to trim the angle of the pole piece. The diaphragm is pierced, and the scrap rate is high, so it is necessary to improve the quality of the lamination for the acute angle trimming of the pole piece, which is the primary problem to be solved in the prior art

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