Method for Determining the Opening Width of Extrusion Coated Gaskets and Its Application

Abstract

The invention aims to disclose a method for determining opening width of an extrusion-coated gasket and application of the method. The method for determining opening width of the extrusion-coated gasket comprises the following steps: measuring first elastic modulus of to-be-coated slurry, and determining the opening width of the extrusion-coated gasket according to a quadratic fit curve, wherein the quadratic fit curve is determined according to the following steps: providing various kinds of standard coating slurry; measuring second elastic modulus of various kinds of standard coating slurry;under the same condition, utilizing the extrusion-coated gasket to perform extrusion coating treatment on various kinds of standard coating slurry, thereby obtaining a plurality of battery pole pieces; measuring width y1 of the multiple battery pole pieces; determining a plurality of width difference values according to a formula y=y1-y2, wherein y is a width difference value, and y2 is opening width of the extrusion-coated gasket; fitting based on the multiple width values and the multiple second elastic modulus, thereby obtaining the quadratic fit curve. The method can be used for quickly and accurately obtaining the opening width of the extrusion-coated gasket.

Description

technical field [0001] The present invention relates to the field of battery technology, specifically, to a method for determining the opening width of an extrusion-coated gasket and its application, more specifically, to a method for determining the opening width of an extrusion-coated gasket, and to a method for preparing battery pole pieces A method, an extrusion coating device for preparing a battery pole piece and a battery pole piece. Background technique [0002] Extrusion coating is widely used in the lithium battery industry due to its remarkable advantages such as stable size and surface density, and is used to prepare battery pole pieces for lithium batteries. During extrusion coating, the width of the battery pole piece is determined by the opening width of the coating gasket. Theoretically, the width of the battery pole piece is equal to the opening width of the coating gasket. Among them, the power battery is mostly coated by leaving foil on the edge. The widt...

AI Technical Summary

Problems solved by technology

When the width of the coated pole piece is unqualified, the edge thickness of the pole piece will be uneven, and the subsequent coating will be poor, resulting in poor capacity and short life of the finished battery. In severe cases, it may cause dangerous behaviors such as battery explosion.

Therefore, when the pole pieces obtained by coating are unqualified, the gaskets of the original coating equipment can only be scrapped and the gaskets redesigned, resulting in large economic losses and time losses.

[0003] Therefore, the research on gaskets for coating equipment needs to be further studied

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