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Steel shell button cell and preparation method thereof

A technology of button battery and steel case, which is applied in the field of steel case button battery and its preparation, which can solve the problems of electrolyte residue, discoloration of weld seam surface, weld voids and other problems, so as to improve sealing performance and laser welding Stability, the effect of improving stability

Active Publication Date: 2021-12-17
HUIZHOU HENGTAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional steel case button battery packaging method and the closing method are prone to liquid leakage
In addition, after the top and bottom steel shells are soaked in the electrolyte, a fog and frost surface will be formed on the surface. When the laser is welded at high temperature, the fog and frost layer will be heated and evaporate to generate air bubbles, resulting in weak welds and poor pores in the weld; there is electrolyte on the surface of the steel shell Residue, when the laser high-temperature welding evaporates and releases the mixed gas, resulting in poor discoloration of the weld surface

Method used

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  • Steel shell button cell and preparation method thereof
  • Steel shell button cell and preparation method thereof
  • Steel shell button cell and preparation method thereof

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preparation example Construction

[0047]The present application provides a method for preparing a steel button cell. Steel coin cell prepared above method comprises the steps of: a header assembly, for punching the sealing cap and the bottom shell molding operation, wherein the bottom cover is formed with a receiving cavity, placing the liquid inlet port and the injection port in communication with said receiving chamber, said injection port and the liquid is placed on both sides of each opening formed in the bottom cover; the positive electrode cell tab assembly and the cap assembly is first welding operation; the cell assembly and said pan negative electrode tab a second welding operation; the cell assembly is placed in the bottom shell, and closing operation of the cover; and the cap assembly the first edge of the bottom case is a laser welding operation, the injection cell to be obtained; injection-electrolyte liquid injection operation of the battery to be under vacuum; sealing cap pouring port provided in th...

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Abstract

The invention provides a steel shell button cell and a preparation method thereof. The preparation method of the steel shell button cell comprises the following steps: carrying out punching forming operation on atop cover assembly, a bottom shell and a sealing cover, wherein a containing cavity, a containing opening and a liquid injection opening are punched in the bottom shell, and the liquid injection opening and the containing opening are formed in the two sides of the bottom shell respectively; carrying out first welding operation on a positive tab in the battery cell assembly and the top cover assembly; carrying out second welding operation on a negative tab in the battery cell assembly and the bottom shell; putting the battery cell assembly into the bottom shell, and carrying out cover closing operation; performing first laser welding operation on the edges of the top cover assembly and the bottom shell to obtain a battery to be injected with liquid; performing electrolyte injection operation on the battery to be injected under a vacuum condition; and covering the liquid injection opening with the sealing cover, and carrying out second laser welding operation on the sealing cover and the bottom shell under a vacuum condition to obtain the steel shell button cell. The preparation method of the steel shell button cell can effectively prevent liquid leakage and improve the welding effect.

Description

Technical field [0001] The present invention relates to the field of battery technology, and more particularly to a steel shell buckle battery and a preparation method thereof. Background technique [0002] With the development of portable electronic products and intelligent wear electronics, the battery is required to be more miniaturized. While maintaining a high life, the battery is required to have as high volume ratio energy, quality ratio energy, so the demand for steel shell button is increasing. [0003] The conventional steel shell is typically used in the following two packages. One is that the positive and negative pole housings of the steel shell battery are fastened to each other by the inner diameter, and fixed connection through the card slot at the connection of the upper and lower housing. Second, the upper edge of the positive electrode housing is buckled by the upper edge of the positive electrode housing, so that the negative electrode cover is fixed. Traditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/627H01M50/119H01M50/169H01M50/183H01M50/536H01M50/636H01M10/04
CPCH01M50/627H01M50/183H01M50/169H01M50/119H01M50/636H01M50/536H01M10/0427H01M10/0431Y02E60/10Y02P70/50
Inventor 李路强沈立强朱剑峰刘志伟曾贤华
Owner HUIZHOU HENGTAI TECH
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