Cylinder type lithium ion battery cell and making method thereof

A technology for lithium-ion batteries and manufacturing methods, which is applied in the field of batteries and cylindrical lithium-ion battery cells, can solve the problems of poor safety, leakage rate and high production scrap rate, and achieve low leakage rate, low production scrap rate, high energy effect

Inactive Publication Date: 2010-02-03
珠海汉格能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new cylindrical lithium-ion battery cell and a corresponding manufacturing method to solve the problems of the existing cylindrical lithium-ion battery cell, such as high liquid leakage rate, high production scrap rate and poor safety.

Method used

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  • Cylinder type lithium ion battery cell and making method thereof
  • Cylinder type lithium ion battery cell and making method thereof
  • Cylinder type lithium ion battery cell and making method thereof

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Embodiment Construction

[0031] The following descriptions are only preferred embodiments embodying the principles of the present invention, and do not therefore limit the protection scope of the present invention.

[0032] The battery cell of the present invention includes a casing, a positive pole piece and a negative pole piece, wherein the positive pole piece is composed of a positive electrode base welded with an aluminum tab, and the negative pole piece is composed of a negative pole base welded with a nickel tab, and the aluminum tab and the nickel tab are respectively It is an aluminum sheet and a nickel sheet compounded with ear glue on both sides; the positive electrode sheet, the negative electrode sheet and the diaphragm are wound together to form a core, and the outer shell is an aluminum-plastic composite film with double arc grooves, and the core is located on the double circle. inside the arc groove.

[0033] In the following, a cylindrical lithium-ion battery cell with a diameter of 7...

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Abstract

The invention discloses a cylinder type lithium ion battery cell and making method thereof; wherein the making method of the cylinder type lithium ion battery cell includes the following steps: (1) making an aluminium lug and a nickel lug; (2) making a positive plate and a negative plate by respectively welding the aluminium lug and the nickel lug with a positive substrate and a negative substratefirmly; (3) obtaining an aluminium plastic composite membrane with dual circular arc structure by adopting a mould with circular structure to punch the aluminium plastic composite membrane; (4) winding the positive plate, the negative plate and a diaphragm in to a winding core; (5) placing the winding core into the aluminium plastic membrane for sealing the two end faces, so as to obtain sealed semi-finished product cell; (6) baking the semi-finished product cell and then injecting electrolyte containing Li<+>, and carrying out precharge after the semi-finished product cell is laid for a period of time; (7) vacuumizing and sealing the side of the cell after precharge, and then cutting excessive aluminium plastic composite membrane, so as to the obtain finished product cell.

Description

Technical field: [0001] The invention relates to the technical field of batteries, in particular to the technical field of cylindrical lithium-ion battery cells. Background technique: [0002] Traditional small-diameter cylindrical lithium-ion battery cells use steel shell or aluminum shell as the shell material of the battery, and the seal is sealed by mechanical extrusion or laser welding, which has problems such as high leakage rate, high production scrap rate, and poor safety performance. , not suitable for use in some small electronic consumer products. Invention content: [0003] The object of the present invention is to provide a new cylindrical lithium-ion battery cell and a corresponding manufacturing method to solve the problems of the existing cylindrical lithium-ion battery cell with high liquid leakage rate, high production scrap rate and poor safety. [0004] In order to achieve the above object, the manufacturing method of the cylindrical lithium-ion batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/38
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 曾建华胡常青周清朱燕飞
Owner 珠海汉格能源科技有限公司
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