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Button type lithium ion secondary battery and preparation method thereof

A secondary battery, lithium ion technology, applied in the preparation of button-type lithium-ion secondary batteries, in the field of button-type lithium-ion secondary batteries, can solve problems such as occupying space, and achieve the effect of great use

Inactive Publication Date: 2016-11-23
深圳金山电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the top assembly of a cylindrical battery needs to occupy a certain amount of space, and has its own design limit in the height direction

Method used

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  • Button type lithium ion secondary battery and preparation method thereof
  • Button type lithium ion secondary battery and preparation method thereof
  • Button type lithium ion secondary battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: see figure 1 and figure 2 , the present embodiment provides a button-type lithium-ion secondary battery, which includes a battery casing, and an electric cell 4 and an electrolyte located inside the casing; the electric cell 4 is a cylindrical electric cell, and the center of the electric cell 4 is set There is a cylindrical auxiliary device 9 with a hollow interior; the shell includes a top cover assembly and a bottom cup 2, and a top cover placement position 3 is provided at the opening of the bottom cup 2, and the top cover assembly and the bottom cup 2 are fixed by welding; The two poles of the battery cell 4 are respectively connected with the top cover assembly and the bottom cup 2 through guide strips; a liquid injection hole 7 is also provided on the casing.

[0035]The top cover assembly includes a central column 1a and a circular cover 1c with a through hole in the middle, the central column 1a is located at the through hole of the circular cov...

Embodiment 2

[0050] Example 2: see image 3 , the present embodiment provides a button-type lithium-ion secondary battery and a method for preparing the button-type lithium-ion secondary battery; its structure and steps are basically the same as in Example 1, the difference being:

[0051] A button-type lithium-ion secondary battery, which includes a battery casing, and an electric cell 4 and an electrolyte disposed inside the casing; the electric cell 4 is a cylindrical electric cell, and the center of the electric cell 4 is provided with an internal hollow cylindrical Auxiliary device 9; the shell includes a top cover assembly and a bottom cup 2, and a top cover placement position 3 is provided at the opening of the bottom cup 2, and the top cover assembly and the bottom cup 2 are fixed by welding; the two poles of the electric core 4 pass through The guide piece is connected with the top cover assembly and the bottom cup 2 respectively; a liquid injection hole 7 is also provided on the ...

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Abstract

The invention discloses a button type lithium ion secondary battery. The button type lithium ion secondary battery comprises a battery shell, a battery cell and electrolyte; and the battery cell and the electrolyte are arranged in the shell. The button type lithium ion secondary battery is characterized in that the battery cell is a cylindrical battery cell, a hollow columnar auxiliary device is arranged in the center of the battery cell, the shell comprises a top cover assembly and a bottom cup, a top cover placing position is arranged at the opening of the button cup, and the top cover assembly is fixedly welded with the button cup; two poles of the battery cell are respectively connected with the top cover assembly and the bottom cup through conduction plates; and a liquid injection hole is further formed in the shell. The invention further provides a preparation method of the button type lithium ion secondary battery.

Description

technical field [0001] The invention relates to the field of lithium-ion battery manufacturing, in particular to a button-type lithium-ion secondary battery and a method for preparing the button-type lithium-ion secondary battery. Background technique [0002] The button battery is a chamber structure composed of a metal bottom case and a top case. The bottom case is usually connected to the positive terminal, while the top case is usually connected to the negative terminal. There is a plastic rubber ring (usually polypropylene) between the bottom case and the top case. The rubber ring plays the function of sealing and insulation at the same time. When sealing, the edge of the bottom shell is squeezed inward by mechanical force, and is enclosed with the top shell to form a closed shell. See US6569564 for a specific example. [0003] Usually, the inside of the button battery housing is a "sandwich" structure battery cell composed of a single layer of positive electrode sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M2/02H01M2/04H01M10/0525
CPCH01M10/0525H01M10/0587H01M50/109H01M50/147H01M50/153Y02E60/10Y02P70/50
Inventor 关秀明郑为工周如心
Owner 深圳金山电池有限公司
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