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Steel shell button cell heat sealing mold and manufacturing method

A button battery and heat sealing technology, which is applied in secondary battery manufacturing, electrolyte storage battery manufacturing, primary battery, etc., can solve problems such as high scrap rate, seal cracking, and electrolyte outflow, so as to improve yield rate and production efficiency, The effect of improving sealing performance and improving sealing effect

Pending Publication Date: 2021-05-14
GUANG DONG VDL NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The positive and negative casings of the existing button-type lithium batteries are generally formed by stamping steel plates to form the positive and negative casings of the battery. The packaging of the button-type lithium batteries adopts pressure packaging. There is a large compressive stress. If the general packaging method is used, the fusion between the positive electrode casing, the negative electrode casing and the sealing ring will not be good, and the gap between the assemblies will not be well controlled, which will easily lead to poor sealing performance of the battery and a high scrap rate. Higher, when the battery heats up during use and slightly expands, it will cause the seal to crack, causing the electrolyte to flow out, resulting in damage to the battery

Method used

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  • Steel shell button cell heat sealing mold and manufacturing method
  • Steel shell button cell heat sealing mold and manufacturing method
  • Steel shell button cell heat sealing mold and manufacturing method

Examples

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Effect test

Embodiment 1

[0031] Please refer to Figure 1 to Figure 6 , Embodiment 1 of the present invention provides a heat-sealing mold for a steel case button battery, the heat-sealing mold 9 includes an upper die 2 for sealing the positive case 11 and a lower die for sealing the negative case 12 3. The upper top mold 2 is connected to the press. When working, the upper top mold 2 moves downward, and the lower top mold 3 does not move. Between the upper top mold 2 and the lower top mold 3 A sealing die 4 is installed, and the heat-sealing action of the steel shell button battery 8 is carried out inside the sealing die 4, such as image 3 As shown, the outer side of the sealing mold 4 is provided with a groove 41, and the inside of the groove 41 is equipped with a heating device 5 for heating the sealing mold 4, and the heating device 5 is controlled by a temperature controller module, controlled by a temperature controller The device module controls the heating device 5 to reach the appropriate t...

Embodiment 2

[0037] Such as Figure 7 As shown, Embodiment 2 of the present invention provides a method for manufacturing a steel case button battery with a heat sealing mold for a steel case button battery, comprising the following steps:

[0038] Step S1, manufacturing the positive electrode casing 11 and the negative electrode casing 12; stamping and forming the steel foil with a thickness of 2-3mm using a specific production mold, so that the positive electrode casing 11 and the negative electrode casing 12 have the same characteristics as the positive electrode sheet and the negative electrode casing 12. Grooves for the negative electrodes to fit into each other, and the openings have bent edges that can be engaged with each other;

[0039] Step S2, manufacturing the positive electrode sheet and the negative electrode sheet; coating the positive electrode slurry on the positive electrode current collector, coating, molding and drying, punching it into a corresponding shape with a punc...

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Abstract

The invention discloses a steel shell button cell heat sealing mold and a manufacturing method, the heat sealing mold comprises an upper top mold used for sealing a positive pole shell and a lower top mold used for sealing a negative pole shell, a sealing mold is arranged between the upper top mold and the lower top mold, a groove is formed in the outer side of the sealing mold. A heating device used for heating the sealing die is arranged in the groove, a first round hole used for containing the upper top die to move up and down is formed in one end of the middle of the sealing die, a second round hole used for containing the lower top die to move up and down is formed in the other end of the middle of the sealing die, and an annular boss used for pressing the tail end of the positive pole shell into a circular arc shape is arranged at the tail end of the first round hole. The annular boss comprises a first end face and a second end face, the diameter of the first end face is larger than that of the second end face, and the annular boss is big at the upper end and small at the lower end. According to the invention, the sealing performance of the steel shell button cell can be improved, and bad phenomena caused by poor fusion of the sealing port can be reduced; and the yield and the production efficiency of the steel shell button cell are improved.

Description

technical field [0001] The invention relates to the technical field of steel case button batteries, in particular to a steel case button battery heat sealing mold and a manufacturing method. Background technique [0002] Button cell (button cell), also known as button cell, refers to a battery that looks like a small button. Generally speaking, it has a larger diameter and a thinner thickness (compared to cylindrical batteries such as No. 5 AA batteries on the market), The button battery is divided into batteries from the shape, and the corresponding battery classification includes cylindrical batteries, square batteries, special-shaped batteries, etc. [0003] The positive and negative casings of the existing button-type lithium batteries are generally formed by stamping steel plates to form the positive and negative casings of the battery. The packaging of the button-type lithium batteries adopts pressure packaging. There is a large compressive stress. If the general pack...

Claims

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Application Information

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IPC IPC(8): H01M6/00H01M6/14H01M10/04H01M10/052H01M10/058
CPCH01M6/005H01M6/14H01M10/0404H01M10/0427H01M10/052H01M10/058Y02E60/10Y02P70/50
Inventor 陈喻斯
Owner GUANG DONG VDL NEW ENERGY CO LTD
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