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Production method of button cell without welding traces and prepared button cell

A technology of a button battery and a production method, which is applied to the equipment for manufacturing a primary battery, a cylindrical shell battery/battery, a primary battery, etc. Bulge and other problems, to achieve the effect of good connection stability, easy detection, and avoidance of virtual welding

Pending Publication Date: 2020-07-03
FUJIAN NANPING YANPING DISTRICT NANFU NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the first output conductor and the first pole shell are welded, both the resistance welding current and the laser beam of the laser welding will penetrate the first pole shell, and the welding spot connecting the first pole shell and the first output conductor is through the first pole shell. The setting of the shell destroys the surface flatness and stability of the first pole shell. During the use of the battery, electrolyte leakage and surface bulges are prone to occur at the solder joints of the first pole shell.

Method used

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  • Production method of button cell without welding traces and prepared button cell
  • Production method of button cell without welding traces and prepared button cell
  • Production method of button cell without welding traces and prepared button cell

Examples

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Embodiment 1

[0032] combine Figure 1~Figure 4 , a production method of a button battery without welding traces, the button battery includes a positive electrode case 11, a negative electrode case 12, an insulating sealing ring 70 and an electric core 30, the positive electrode case 11 and the negative electrode case 12 are cup-shaped, and the positive electrode case 11 and the negative electrode case 12 are cup-shaped. Negative pole case 12 can open up and down relative to buckle to form cylindrical button cell casing; Described positive pole case 11 and negative pole case 12 partially overlap in vertical direction, and the opening end wall 111 of described positive pole case 11 is positioned at the opening end wall of negative pole case 12 121 inside, there is a gap between the opening end wall 111 of the positive electrode casing 11 and the opening end wall 121 of the negative electrode casing 12, and the insulating sealing ring 70 fills the gap to electrically isolate the positive elect...

Embodiment 2

[0040] like Image 6 As shown, the difference between the production method of the button battery without welding traces in Example 2 and the production method of the button battery without welding traces in Embodiment 1 is that step S2 is continuously carried out in the welding method between the negative electrode tab 22 and the negative electrode shell 12 2 times, 2 pairs of second welding spots 60 are formed between the metal sheet 40 and the negative electrode casing 12, and there are two welding positions overlapped in the welding positions of the metal sheet 40 and the negative electrode casing 12 in different sub-steps S2, and the remaining steps are all Same as Example 1.

[0041] like Image 6 As shown, the button battery without welding marks according to embodiment 2 is different from the button battery without welding marks in embodiment 1 in that: the number of second welding spots 60 is 2 pairs, and the second welding spots of different pairs There are two sec...

Embodiment 3

[0043] like Figure 7 As shown, the difference between the production method of the button battery without welding traces in Example 3 and the production method of the button battery without welding traces in Embodiment 1 is that step S2 is continuously carried out in the welding method between the negative electrode tab 22 and the negative electrode case 12 3 times, 3 pairs of second welding spots 60 were formed between the metal sheet 40 and the negative electrode casing 12, and the welding positions of the metal sheet 40 and the negative electrode casing 12 in different steps S2 did not overlap, and the remaining steps were all the same as in Example 1 same.

[0044] like Figure 7 As shown, the button battery without welding marks according to embodiment 3 is different from the button battery without welding marks in embodiment 1 in that: the number of second welding spots 60 is 3 pairs, and the second welding spots of different pairs 60 do not overlap, and all the other...

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Abstract

The invention provides a production method of a button cell without welding traces and the prepared button cell. A method for electric connection between a negative electrode tab and a negative electrode shell comprises the following steps: welding one end, extending out of a battery cell, of the negative electrode tab on a metal sheet, and then welding the metal sheet on the inner surface of thenegative electrode shell in a parallel-welding resistance welding manner so as to realize electric connection between the negative electrode tab and the negative electrode shell. A method for electricconnection between a positive electrode tab and a positive electrode shell comprises the following steps: bending one end, which extends out of the battery cell, of the positive electrode tab upwardsfrom the lower part of an insulating sealing ring along the outer side wall of the insulating sealing ring and clamping the end between the insulating sealing ring and the opened end wall of the positive electrode shell so as to realize the electric connection between the positive electrode tab and the positive electrode shell. The outer surface of the button cell prepared by using the method issmooth and intact, and the phenomena of electrolyte leakage, surface swelling and the like can be avoided.

Description

technical field [0001] The invention relates to the field of button batteries, in particular to a production method of a button battery without welding traces and the produced button battery. 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), Button batteries are classified from the shape, and the corresponding battery classifications include cylindrical batteries, square batteries, special-shaped batteries, etc. [0003] Button batteries include laminated and wound ones. The basic structure of the wound button battery is: including the first pole shell, the second pole shell, the insulating sealing ring and the battery core, the first pole shell and the second pole shell are oppositely buckled to form a cylindrical button battery shell; There i...

Claims

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Application Information

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IPC IPC(8): H01M2/22H01M2/26H01M2/08H01M2/10H01M6/00H01M6/10H01M10/04B23K11/00H01M50/528
CPCH01M6/005H01M6/10H01M10/0427B23K11/00H01M50/216H01M50/183H01M50/528H01M50/531Y02E60/10Y02P70/50
Inventor 常海涛叶永锋张志明许华灶
Owner FUJIAN NANPING YANPING DISTRICT NANFU NEW ENERGY TECH CO LTD
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