A method and device for improving the coating degree of lithium-ion battery winding core

Abstract

The invention belongs to the field of lithium ion batteries. Disclosed is a method for improving the coating degree of lithium-ion battery winding cores, including: first step, setting the standard range of the distance from the positive electrode sheet, the negative electrode sheet, the upper diaphragm, the lower diaphragm to the substrate; the second step, during the winding process, real-time Detect the distance from the positive electrode, negative electrode, upper diaphragm, lower diaphragm to the substrate; the third step, compare the measured values ​​with the corresponding standard range; the fourth step, automatically adjust the positive electrode, negative electrode, upper diaphragm, lower diaphragm according to the comparison results Diaphragm-to-substrate distance; repeat steps 2 to 4. Through the above method, the present invention realizes the purpose of automatically adjusting the distance from the positive electrode sheet, the negative electrode sheet, the upper diaphragm, and the lower diaphragm to the substrate, so that the positive electrode sheet, the negative electrode sheet, the upper diaphragm, the lower diaphragm and the substrate are always kept in a parallel state, and the positive electrode sheet, the negative electrode The centerlines in the width direction of the sheet, the upper separator and the lower separator are always kept in a state of overlapping, which improves the coating degree of the lithium-ion battery core in the width direction.

Description

Technical field [0001] The present invention relates to the field of lithium ion batteries, in particular to the winding core coating of lithium ion batteries. Background technique [0002] The lithium-ion battery winding core combines the positive electrode, the negative electrode and the separator in a winding manner, and is also called a battery core. For lithium ion batteries, the sufficient degree of coating of the negative electrode by the separator and the sufficient degree of coating of the positive electrode by the negative electrode are very important. Insufficient coating will bring fatal defects such as safety and short circuit. [0003] figure 1 It is a schematic diagram of the structure of the existing battery positive and negative sheet winding mechanism. The guide plate 11 is fixed on two guide shafts 12, and the two guide shafts 12 are fixed perpendicularly to the base plate 13 of the winding device. The spring 14 is provided with a knob 15 at the other end. The ...

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method and device for improving the coating degree of lithium-ion battery winding cores in view of the above-mentioned defects of the prior art, so as to solve the problem that the coating accuracy cannot be achieved only through manual intervention, and even lead to various products. defect problem

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