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Weldable negative tab and manufacturing method thereof

A manufacturing method and a technology of negative tabs, which are applied in connection, electrical components, circuit/collector components, etc., can solve the problems of not being able to tin, increase the corrosion resistance of negative tabs, and solder without tin, and achieve easy soldering Effect

Inactive Publication Date: 2016-11-09
张跃伟 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, a protective film is coated on the surface of the negative tab to protect the negative tab from being corroded by the electrolyte and increase the corrosion resistance of the negative tab; however, due to this layer of protective film (passive The presence of the layer), when the tabs are welded to the battery protection board, there will be problems of not tinning or poor welding
[0003] If the protective film (passivation layer) is too thin, the corrosion resistance will be reduced, and if it is thicker, it will lead to no tinning or no soldering at all

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: Provide a method for making a negative electrode ear that is convenient for welding; including the following steps:

[0018] A1. Remove the protective film on both sides of the exposed welding end of the negative tab;

[0019] A2. On the surface of the exposed welding end of the negative tab after removing the protective film, make one or a combination of the following structures that are convenient for welding: blind holes, grooves, through holes, and notches.

Embodiment 2

[0020] Embodiment 2: Provide a method for making a negative electrode ear that is convenient for welding; it is characterized in that it includes the following steps:

[0021] A1. Remove the protective film on both sides of the exposed welding end of the negative tab.

[0022] 1. A method for making a negative electrode ear that is convenient for welding; it is characterized in that: it comprises the following steps:

[0023] A1. Remove the protective film on both sides of the exposed welding end of the negative tab;

[0024] A2. After removal, the surface of the exposed welding end of the negative tab is made into a rough surface.

[0025] In the above manufacturing method; it also includes the step of deburring the welding surface of the negative tab.

Embodiment 3

[0026] Embodiment 3: Provide a method for making a negative electrode ear that is convenient for welding; including the following steps:

[0027] A1. Make one or a combination of the following structures on the surface of the exposed welding end of the negative tab to facilitate welding: blind holes, grooves, through holes, and notches.

[0028] By grinding or punching or notching the surface of the negative tab, it is easier to solder and can ensure the welding reliability of the negative tab when it is welded with other components and provide qualified products. Rate.

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PUM

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Abstract

The invention discloses a manufacturing method of a weldable negative tab. The manufacturing method includes removing protective films on two sides of an exposed welding end of the negative tab, making rough surfaces on the two sides, without the protective film, of the negative tab, carrying out deburring treatment to a welding surface of the negative tab, and forming one or combination of blind holes, slots, through holes and gaps which facilitate welding on the surface of the exposed welding end of the negative tab. By buffing, perforating or slotting on the surface of the negative tab, soldering tin can be welded more easily; during welding, weld reliability of the negative tab welded with other structure can be guaranteed, and qualification rate of products is increased.

Description

technical field [0001] The invention relates to lithium battery technology; in particular, it relates to a method for making a negative electrode ear which is convenient for welding and the negative electrode ear. Background technique [0002] In the prior art, a protective film is coated on the surface of the negative tab to protect the negative tab from being corroded by the electrolyte and increase the corrosion resistance of the negative tab; however, due to this layer of protective film (passive The existence of the layer), when the tabs are welded to the battery protection board, there will be problems of no tinning or poor welding. [0003] If the protective film (passivation layer) is too thin, the corrosion resistance will be reduced, and if it is thicker, it will lead to no tinning or no soldering at all. Contents of the invention [0004] The object of the present invention is to provide a method for making a negative electrode tab that is convenient for weldin...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01R43/02H01M50/531
CPCH01R43/0228H01M50/531Y02E60/10
Inventor 张跃伟陈俊良
Owner 张跃伟