Manufacture method of arc soft-package lithium ion battery

Abstract

The invention discloses a manufacture method of an arc soft-package lithium ion battery. In a preparation step of a cell, a positive plate with a positive tag and a negative plate with a negative tag are separated by virtue of a diaphragm, the diaphragm is wound surrounding a winding needle, during the winding process, the rotation axial direction of the winding needle is consistent with the axial direction of bending radian of the cell to be prepared, and after the winding is completed, the winding needle is withdrawn; a cell packaging step specifically comprises the following steps: I, preparing an aluminum-plastic shell, wherein the aluminum-plastic shell comprises a left shell and a right shell connected to the left shell, the right shell is provided with a first arc section, and the left shell is provided with a second arc section; II, placing the cell into the first arc section of the right shell, folding the aluminum-plastic shell, and enabling the second arc section to cover the cell; and then hot sealing the folded aluminum-plastic shell. The manufacture process is simple to operate, low in cost, easy to realize, capable of greatly improving the production efficiency and rate of finished products and suitable for preparing various arc soft-package lithium ion batteries in complex shapes.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a method for manufacturing an arc-shaped flexible package lithium ion battery. Background technique [0002] With the development of society, lithium-ion batteries are widely used in various electronic products, such as mobile phones, computers, cameras and other digital products, due to their high energy density, environmental protection and other advantages. Due to the diversification of electrical appliances, consumers have more and more requirements for batteries and battery appearance design. Traditional cylindrical, square and other soft-packaged lithium-ion batteries have been difficult to meet market demand. In recent years, some special-shaped soft-packaged lithium-ion batteries have gradually emerged. Among them, arc-shaped soft-packaged lithium-ion batteries are a typical representative, which are mainly used in ring appliances. [0003] The ...

AI Technical Summary

Problems solved by technology

This method avoids the wrinkling or stretching deformation of the aluminum-plastic shell during the bending process, resulting in poor appearance of the product. Compared with the single pit or semi-finished direct pressing process, the present invention does not need to use a hot press for hot pressing and shaping, and the manufactured lithium Ion batteries can be well loaded into electrical appliances with irregular arcs, overcoming the current problems such as the limited size and arc of special-shaped pouch batteries

Images