The connection structure and connection method of tabs and poles

A technology of connection structure and connection method, which is applied in the direction of connection, structural parts, circuit/current collector parts, etc., to reduce costs, improve battery energy density, and improve production efficiency.

Active Publication Date: 2020-07-28
SHENZHEN GEESUN INTELLIGENT TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of this application is to solve the existing problems in the prior art of using ultrasonic welding to connect battery tabs and poles. This application proposes a new connection structure and method for connecting tabs and poles, so as to improve Column connection quality and efficiency

Method used

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  • The connection structure and connection method of tabs and poles
  • The connection structure and connection method of tabs and poles
  • The connection structure and connection method of tabs and poles

Examples

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Embodiment 1

[0045] figure 1 and figure 2 It shows a specific application example of the connection structure of tabs and poles of this application in a lithium-ion battery in which the positive and negative electrodes are arranged on the same side (that is, the positive and negative electrodes of the battery are arranged on the same side of the battery). The same as the traditional battery, the lithium-ion battery also includes: a shell with an open structure at the upper end (in order to make it easier for readers to see the connection structure between the tab and the pole, the figure does not draw the shell structure), the bare cell 2 accommodated in the case, and the case cover 4 arranged at the openings at both ends of the case. Wherein, the left and right sides of the bare cell 2 are respectively provided with tabs 3 , and the left and right sides of the case cover 4 are provided with poles 5 . Wherein, the tab 3 on the left side of the bare cell 2 is a positive tab, and the tab ...

Embodiment 2

[0057] image 3 and Figure 4 It shows a specific application example of the lithium-ion battery in which the connection structure of the lug and pole of the present application is arranged on both sides of the positive and negative electrodes (that is, the positive and negative electrodes of the battery are arranged on two opposite sides of the battery). The same as the traditional battery, the lithium-ion battery also includes: a casing 1 with open structures at both ends of the upper and lower ends, a bare battery cell 2 accommodated in the casing, and open cells respectively arranged at the upper and lower ends of the casing. Two shell covers at the mouth 4. The upper and lower ends of the bare cell 2 are respectively provided with tabs 3 , and each case cover 4 is provided with a pole 5 . The pole 5 on one of the shell covers 4 is a positive pole, and the pole 5 on the other shell 4 is a negative pole; The ear is the negative pole ear. Specifically, in image 3 Among...

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Abstract

The application discloses a connecting structure of a lug and a pole, and a connecting method. The connecting structure comprises the lug and the pole, a lug connecting hole corresponding to the lug is formed on the pole; the lug extends into the pole connecting hole in the pole, and the lug is connected with the pole through a friction-stirring welding process. The connecting structure disclosed by the application improves the connecting quality and efficiency of the lug and the pole.

Description

technical field [0001] The present application relates to the field of lithium battery production, in particular to a connection structure and method for connecting tabs and poles. Background technique [0002] In the production process of lithium-ion batteries, it is necessary to go through the process of pole piece production-cell welding-cell casing-shell cover packaging-drying liquid injection-chemical composition, among which the cell welding process is to combine aluminum foil tabs with Aluminum poles, copper foil tabs and copper poles are welded together, requiring reliable welding and low internal resistance. At present, the industry uses ultrasonic welding. Ultrasonic metal welding uses high-frequency vibration tens of thousands of times per second. The wave is transmitted to the surface of two metal workpieces to be welded, and then a certain pressure is applied to make the metal surfaces rub against each other to form fusion between the molecular layers to achieve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/26H01R43/02
CPCH01R43/02H01M50/531Y02E60/10
Inventor 陈耀平陈相阳如坤
Owner SHENZHEN GEESUN INTELLIGENT TECHNOLOGY CO LTD
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