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Bag-making type lithium ion battery and preparation method thereof

A lithium-ion battery and bag-type technology, which is applied in the manufacture of electrolyte batteries, battery pack components, non-aqueous electrolyte batteries, etc., can solve problems such as low production efficiency and poor control, and achieve improved performance, reduced self-discharge, and improved The effect of sealing and safety performance

Inactive Publication Date: 2013-05-08
TIANJIN ENERGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the present invention is to solve the problems of low production efficiency and poor control of positive and negative electrode alignment in the prior art, and provide a bag-making lithium ion battery and its preparation method

Method used

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  • Bag-making type lithium ion battery and preparation method thereof
  • Bag-making type lithium ion battery and preparation method thereof
  • Bag-making type lithium ion battery and preparation method thereof

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Embodiment Construction

[0028] In order to make those skilled in the art understand the present invention scheme better, the present invention is described in further detail below:

[0029] A bag-making lithium-ion battery is composed of aluminum-plastic packaging film, positive electrode lug, negative electrode lug, pole piece and bag-making pole piece. Then the bag-made pole piece and the counter electrode are stacked together layer by layer to form a pole group, and then the positive pole tab and the negative pole tab are respectively welded together with the positive pole tab and negative pole tab of the pole group, and are wrapped with aluminum-plastic packaging film Packaged and then packaged.

[0030] In the technical solution of the present invention, the diaphragm, positive electrode, diaphragm, and negative electrode laminates are assembled in a stacked design. The negative electrode sheet or the positive electrode sheet and the diaphragm are packaged into bags, and then stacked into poles ...

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Abstract

The invention discloses a bag-making type lithium ion battery and a preparation method thereof. The bag-making type lithium ion battery consists of an aluminum plastic package film, a positive electrode lug, a negative electrode lug, an electrode piece and bag-making type electrode pieces, wherein the electrode pieces and upper and lower layers of membranes are manufactured into a bag containing the electrode pieces in an adhesion manner; the bag-making type electrode pieces and counter electrodes are overlapped together layer to layer to form an electrode group; and the positive electrode lug and the negative electrode lug are respectively welded with a positive electrode lug and a negative electrode lug of the electrode group together. With the adoption of the lithium ion battery provided by the invention, the production efficiency and the yield in manufacturing through a battery assembly process can be improved; and the security problem possibly occurring in a process of using the lithium ion battery can be prevented to a certain extent.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a bag-making lithium ion battery and a preparation method thereof. Background technique [0002] At present, the traditional manufacturing methods of lithium-ion batteries mainly include winding type and laminated type. The manufacturing methods of laminated cells mainly include free lamination, "Z"-shaped lamination, etc. Different methods are suitable for different fields, and also correspond to different production methods. [0003] The production method of free lamination: diaphragm, negative electrode sheet, diaphragm, positive electrode sheet, ... positive electrode sheet, diaphragm, negative electrode sheet, diaphragm, etc. are stacked layer by layer according to certain process requirements. The free lamination method is simple and flexible, and is suitable for the production of manual test cells. However, since the diaphragm of this method is a thin PP or PE film, operations su...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M2/16
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 刘国庆焦天宇王驰伟郭春泰
Owner TIANJIN ENERGIES
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