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Metal shell battery lead welding method

A technology of tab welding and metal battery, applied in battery pack parts, non-aqueous electrolyte battery, electrolyte battery manufacturing and other directions, can solve the problems of low yield and difficult process, achieve high product yield and improve production efficiency , the effect of convenient processing

Inactive Publication Date: 2019-06-07
CHONGQING VDL ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When injecting liquid, the battery cell and the battery case 4 are connected together through the tab 3, which makes the process of liquid injection difficult and the yield rate is low

Method used

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  • Metal shell battery lead welding method
  • Metal shell battery lead welding method
  • Metal shell battery lead welding method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Please refer to Figure 5 and Figure 6 , In this embodiment, the 18650 battery is taken as an example to illustrate the application of the tab welding method of the metal shell battery provided by the present invention in the tab welding of the 18650 battery. The battery includes a metal battery casing 4, a positive electrode sheet 1, a negative electrode sheet 2, and a tab 3. The positive electrode sheet 1 and the negative electrode sheet 2 are stacked to form a battery cell. The battery casing 4 includes a negative electrode casing and a positive electrode casing. The tab 3 includes a positive tab and a negative tab, both of the positive shell and the negative shell are metal shells, and the welding method of the tab 3 includes the following steps:

[0028] (1) The electric core is placed in the metal battery casing 4;

[0029] (2) Bend the positive tab once and place it between the cell and the positive case, bend the negative tab once and place it between the cel...

Embodiment 2

[0035] Please refer to Figure 7 and Figure 8 , In this embodiment, a button battery is taken as an example to illustrate the application of the tab welding method of a metal shell battery provided by the present invention in the tab welding of a button battery. The battery includes a metal battery casing 4, a positive electrode sheet 1, a negative electrode sheet 2, and a tab 3. The positive electrode sheet 1 and the negative electrode sheet 2 are stacked to form a battery cell. The battery casing 4 includes a negative electrode casing and a positive electrode casing. The tab 3 includes a positive tab and a negative tab, both of the positive shell and the negative shell are metal shells, and the welding method of the tab 3 includes the following steps:

[0036] (1) The electric core is placed in the metal battery casing 4;

[0037] (2) Bend the positive tab once and place it between the cell and the positive case, bend the negative tab once and place it between the cell an...

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Abstract

The invention discloses a metal shell battery lead welding method. The battery comprises a metal battery shell, a positive electrode sheet, a negative electrode sheet and a lead, wherein the positiveelectrode sheet and the negative electrode sheet are stacked to form a core. The method is suitable for metal shell battery lead welding. After the lead is placed between the core and the metal battery shell, the lead is welded on the inner wall of the metal battery shell by adopting resistance welding or laser welding. The battery is more convenient to process, the product yield is high, and theproduction efficiency is effectively improved. At the same time, the lead only needs to be bent once, and only one layer of the lead is formed, thereby effectively reducing the volume of the battery.

Description

technical field [0001] The invention relates to the field of batteries, and more specifically relates to a method for welding tabs of metal shell batteries. Background technique [0002] Lithium-ion batteries have the advantages of high specific energy, good cycle performance, long life, high working voltage, safety, and no memory effect. They have been widely used in portable electronic devices, energy storage devices, and electric vehicles. Common batteries, such as cylindrical batteries, square batteries, etc., mostly use metal shells, and the tab welding method is generally welded on the inside of the battery shell before the battery is sealed. Please refer to figure 1 and figure 2 , After the 18650 cylindrical battery is wound, there is a middle hole 6 in the middle of the cell formed by the positive pole piece 1 and the negative pole piece 2, and the negative copper tab or nickel tab enters the welding pin 5 through the middle hole 6, and is welded by resistance wel...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01M10/058
CPCY02E60/10Y02P70/50
Inventor 周显茂
Owner CHONGQING VDL ELECTRONICS
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