Method and apparatus for manufacturing electrode assembly of secondary battery

Abstract

The present invention relates to a method and apparatus for manufacturing an electrode assembly of a secondary battery. The embodiment of the invention provides a method for manufacturing an electrodeassembly of a secondary battery. The method comprises the following steps that: a positive plate and a first diaphragm are compositely connected to manufacture a positive composite plate body; a negative plate and a second diaphragm are compositely connected to manufacture a negative composite plate body; the positive electrode composite plate body and the negative electrode composite plate bodyare wound together to form an electrode assembly, the positive plate and the negative plate are isolated through the first diaphragm and the second diaphragm. According to the method for manufacturingthe electrode assembly of the secondary battery, the yield of the electrode assembly can be improved, the structure of winding equipment is simplified, and the winding working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method and equipment for manufacturing an electrode assembly of a secondary battery. Background technique [0002] With the development of society, human beings pay more and more attention to the importance of protecting the environment. Therefore, new energy vehicles are widely used as a means of transportation with good environmental friendliness. The power source of new energy vehicles is mainly power batteries. In the power battery processing equipment, the electrode assembly of the power battery is formed by winding through the winding machine, making the winding machine an important equipment for the production of power batteries. However, the currently equipped winding machines basically use the process of winding the positive electrode sheet, separator, negative electrode sheet, and separator on the winding needle at the same time, and then cutting. This type of wi...

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Problems solved by technology

This type of winding machine is prone to problems such as pole piece discount and winding dust during the production process, which will affect the yield rate and production efficiency of the electrode assembly

In addition, the current winding method needs to set up a winding auxiliary mechanism near the upstream of the winding needle, such as a set of film rollers or a rolling feeding part, to assist the positive electrode sheet, the separator and the negative electrode sheet to enter the winding needle independently and smoothly, so that As a result, the structure of the winding machine equipment is complicated, and the efficiency of feeding and winding is low

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