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Method for sealing lithium ion battery

A lithium-ion battery and battery technology, applied in sealing materials, secondary batteries, battery pack components, etc., can solve problems such as poor air tightness and poor welding strength, and achieve the effect of good sealing and ensuring battery safety.

Inactive Publication Date: 2007-01-24
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to overcome the disadvantages of poor airtightness and poor welding strength in the prior art due to poor sealing of the electrolyte injection hole, the purpose of the present invention is to provide a battery with good airtightness, which can prevent water vapor from entering the interior of the battery, A lithium-ion battery sealing method that can also avoid electrolyte leakage. Another object of the present invention is to provide a lithium-ion battery sealing method with firm structure, high strength and good safety.

Method used

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  • Method for sealing lithium ion battery
  • Method for sealing lithium ion battery
  • Method for sealing lithium ion battery

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Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0039] See figure 1 , The lithium ion battery sealing method of the present invention includes the following steps:

[0040] Step 1. Provide a battery tank and an upper cover with a liquid injection hole. The tank body and the upper cover can be made of metal, such as aluminum or stainless steel. The positive electrode, negative electrode, and separator of the battery can be contained in the tank.

[0041] Step 2. Provide a seal, which is connected with an operating rod. The size of the seal is larger than the liquid injection hole, and the operating rod is smaller than the liquid injection hole, and its length is longer than the liquid injection hole.

[0042] Step 3. Extend the operating rod from the inner side of the upper cover through the liquid injection hole to extend out of the outer side of the upper cover.

[0043] Step 4. Weld the battery ...

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Abstract

This invention provides a sealing method for lithium ion cell which contains providing cell casing and top cap with liquid filling hole, providing a seal piece connected with an operation lever, the size of seal piece is larger than that of liquid filling hole and the size of operation lever is smaller than that of liquid filling hole the length of operation lever is longer than that of liquid filling hole, welding casing with top cap, filling electrolyte from liquid filling hole, sealing the hole by fastening the seal piece, welding operation lever with top cap, removing the extended part of operation lever to complete the sealing.

Description

【Technical Field】 [0001] The present invention relates to a battery packaging method, in particular to a lithium ion battery sealing method using a liquid electrolyte. 【Background technique】 [0002] In recent years, computers, communication electronic products, and consumer electronic products have become more and more powerful, and their dimensions have become smaller and lighter in weight. Therefore, high-capacity, small-size battery products have become popular. In particular, lithium-ion batteries, which have the characteristics of large capacity, high energy density, and high voltage, have continuously increased their market share in mobile phones, notebook computers, digital cameras and other products. [0003] Lithium-ion batteries are based on lithium cobalt oxide (LiCoO 2 ), lithium nickel oxide (LiNiO 2 ) Or lithium manganese oxide (LiMn 2 O 4 ) And the like are the positive electrode active materials, and lithium metal, lithium alloy or carbon materials are used as th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/08H01M10/38H01M10/40H01M50/184H01M50/188
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 黄文正黄全德陈杰良
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD