Soft package lithium cell assembly capable of prolonging service life of cell and lithium cell manufacturing method

Abstract

The invention provides a soft package lithium cell assembly capable of prolonging the service cycle of a cell and a lithium cell manufacturing method, and relates to the technical field of soft package lithium cells. The soft package lithium cell assembly capable of prolonging the service cycle of the cell comprises a first aluminum-plastic packaging film, a first tab is arranged in the first aluminum-plastic packaging film, a second aluminum-plastic packaging film is arranged on the outer side of the first aluminum-plastic packaging film, an insulating sheet is arranged on the outer side face of the second aluminum-plastic packaging film at the position corresponding to the first tab, and a replacement assembly is arranged in the insulating sheet; an exhaust hole is formed in the upper surface of the first aluminum-plastic packaging film, the exhaust hole penetrates through the interior of the first aluminum-plastic packaging film, and an exhaust assembly is arranged in the exhaust hole to achieve gas emission; and side plates are arranged on the front surface and the rear surface of a conveying table. The soft package lithium cell assembly capable of prolonging the service life of the cell and the lithium cell manufacturing method provided by the invention have the advantage of prolonging the service life of the cell.

Description

technical field [0001] The invention relates to the technical field of soft-packed lithium batteries, in particular to a soft-packed lithium battery component and a manufacturing method of the lithium batteries that prolong the service life of the batteries. Background technique [0002] Lithium battery is a kind of battery that uses lithium metal or lithium alloy as positive and negative electrode materials and uses non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have become the mainstream. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain metallic lithium and are rechargeable. Rechargeable batteries Lithium metal battery, the fifth-generation product of China, was born in 1...

AI Technical Summary

Problems solved by technology

[0004]1. Due to the electrolytic reaction between the internal electrolyte and the positive and negative electrode materials, a certain amount of gas will be generated, but because the inside of the soft pack lithium battery is sealed, so The internal volume is also constant, and when gas is generated, it will cause internal expansion, which will cause changes in the position of the tabs bonded to the inside of the soft-packed lithium battery through the aluminum-plastic film heat-melt seal, but due to the thermal fusion of the tab aluminum-plastic film The seal is bonded to the inside of the first aluminum-plastic packaging film, which will reduce the sealing performance and make it impossible to install and use again;

[0005]2. In order to ensure the service life of the soft-packed lithium battery cell, it is usually necessary to make one and two seals, one and two seals The aluminum-plastic packaging films are closely bonded. When the soft-packed lithium batteries bulge, the first and second aluminum-plastic packaging films will bulge at the same time, which cannot effectively protect the internal lithium batteries, thus greatly reduced its service life;

[0006]3. When the positive electrode material, negative electrode material and separator are assembled, they are directly heat-pressed, but the positive electrode material and negative electrode material are placed in the process of There may be a slight bend in the middle, if it is directly heat-pressed, it will cause the fit between the three to be loose, which will cause it to separate during use, and then affect its normal use;

[0007]4. After the second seal, the corners of the aluminum-plastic packaging film need to be trimmed, but the existing trimming methods are inefficient and prone to incomplete trimming situation, greatly reducing its usefulness

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