Method for manufacturing super-thick high-energy-density polymer lithium ion battery cell

Abstract

The invention relates to a method for manufacturing a super-thick high-energy-density polymer lithium ion battery cell. The method comprises the following steps: preparing a positive plate, an isolating membrane and a negative plate; winding the isolating membrane for a half layer, inserting the negative plate, winding the isolating membrane and the negative plate for a layer, inserting the positive plate, and winding the isolating membrane, the negative plate and the positive plate together, wherein the total number of winding layers of the battery cell is 12-76; when the number of the winding layers is 12-36, inserting a plastic hose between the isolating membrane and the positive plate or between the isolating membrane and the negative plate; when the total number of the winding layers is larger than 36, entering a step D; when the total number of the winding layers is less than or equal to 36, entering a step E; when the number of the winding layers of the battery cell is increased to 12-36 in the step D, inserting the plastic hose between the isolating membrane and the positive plate or between the isolating membrane and the negative plate; continuously winding in the step E until the number of the winding layers reaches a preset number; and detaching the plastic hose from the battery cell to obtain the finished product. According to the battery cell produced by the method, the problem that the battery cell is deformed can be solved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a method for manufacturing an ultra-thick high-energy-density polymer lithium-ion battery cell. Background technique [0002] Because polymer lithium-ion batteries have the characteristics of high energy density, lightness and portability, and customizable appearance, the demand for such batteries has increased sharply with the diversification of digital products. In addition, such as mobile power supplies, special equipment, etc. have increased requirements for the capacity of lithium-ion batteries, and the demand for some large-size, high-capacity battery models is increasing. Close to 12.0mm. [0003] There are currently two types of internal pole piece structures in lithium-ion batteries: one is the more common wound-type pole piece structure, which uses a positive electrode, one or two separators and a negative electrode through manual, semi-automatic or Fully au...

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the above-mentioned defects, the present invention provides a method for manufacturing an ultra-thick high-energy-density polymer lithium-ion battery cell. The battery core wound by this method can reserve an expansion space inside the battery core to alleviate the deformation of the battery core. phenomenon, maintain the electrochemical performance of the cell, and easily control the size of the cell. This method has the advantages of simple operation, high production efficiency, low production cost, and high product qualification rate, and is easy to promote and use.

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