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Welding structure for plate electrode foils and plate lug of lithium battery

A welding structure, lithium battery technology, applied in structural parts, welding equipment, non-electric welding equipment and other directions, can solve the problems of being unsuitable for battery foil and tabs, battery tabs and nickel strips, etc. Service life, prevent shattering, increase the effect of connection strength

Active Publication Date: 2015-05-20
WANXIANG 123 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This welding structure reduces the connection strength between the battery tab and the nickel strip, and is not suitable for the connection between the battery foil and the tab

Method used

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  • Welding structure for plate electrode foils and plate lug of lithium battery
  • Welding structure for plate electrode foils and plate lug of lithium battery
  • Welding structure for plate electrode foils and plate lug of lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: as figure 1 The welding structure of a lithium battery pole piece foil and tab is shown, including an electrode 2 formed by stacking a number of pole piece foils 1 together. The electrodes include a positive electrode and a negative electrode, and the pole piece foils 1 are welded together. connection, the right side of the electrode 2 is welded with a tab 3, the upper end of the tab is provided with a tab glue, the other side of the electrode 2 is provided with a shock absorber 4, and the inner side of the shock absorber 4 is provided with a shock absorber cavity 5, which absorbs The shock cavity is filled with high temperature resistant glue 6, and the periphery of the shock absorber 4 extends outward to form an annular welding surface 7. The annular welding surface has a back-shaped structure, and the welding connection between the annular welding surface 7 and the electrode 2 is welded. The bottom is provided with a through hole 8 . First, the shock a...

Embodiment 2

[0024] Embodiment 2: as figure 2 The welding structure of a lithium battery pole piece foil and tab is shown, including an electrode 2 formed by stacking a number of pole piece foils 1 together. The electrodes include a positive electrode and a negative electrode, and the pole piece foils 1 are welded together. connection, the right side of the electrode 2 is welded with a tab 3, the upper end of the tab is provided with a tab glue, the other side of the electrode 2 is provided with a shock absorber 4, and the inner side of the shock absorber 4 is provided with a shock absorber cavity 5, which absorbs The shock cavity is filled with high temperature resistant glue 6, and the periphery of the shock absorber 4 extends outwards to form an annular welding surface 7, which is in a back-shaped structure, and the welding connection between the annular welding surface 7 and the electrode 2, such as Figure 4 As shown, the shock absorbing chamber 5 is provided with spacers 9, and the ...

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Abstract

The invention discloses a welding structure for plate electrode foils and a plate lug of a lithium battery. The welding structure comprise an electrode formed by superposing a plurality of plate electrode foils, wherein the electrode consists of a positive electrode and a negative electrode, the plate electrode foils are welded with one another, the plate lug is welded with one side of the electrode, a damping sheet is arranged at the other side of the electrode, a damping chamber is arranged at the inner side of the damping sheet, a high temperature resistance gum is filled in the damping chamber, the periphery of the damping sheet extends outwards to form an annular welding surface, and the annular welding surface is welded with the electrode; a through hole is formed in the bottom of the damping chamber; the upper end of the damping sheet extends upwards in a bending mode to form an electrode end part retaining sheet and a plate lug connecting plate respectively, the electrode end part retaining sheet clings to the outer end surface of the electrode, and the plate lug connecting plate is welded with the inner side surface of the plate lug. Therefore, the welding structure has the beneficial effects that when the plate electrode foils are welded with the plate lug, the plate electrode foil at the outermost layer cannot be shocked to be broken by virtue of ultrasonic waves, and the service life of the lithium battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of connecting lithium battery pole pieces and foils, in particular to a welding structure between lithium battery pole pieces and tabs. Background technique [0002] The pole piece foil is drawn from one end of each lithium battery pole piece. After being drawn out, the pole piece foil on each pole piece is laminated and welded together to form a conductive end, and then connected to the tab, and then connected to the stage post. At present, the tab welding method of laminated soft-packed lithium batteries generally uses ultrasonic welding to pre-weld the leading foils between the pole pieces to form a pre-welded foil, and then ultrasonically welds the tab metal with the pre-welded foil. The welding foils are welded together to achieve the purpose of welding. However, in the process of ultrasonic welding, since the thickness of the foil drawn from the pole piece is very small, generally around 0.02mm, the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M50/533H01M50/536
CPCB23K20/10H01M50/531Y02E60/10
Inventor 李凡群苏文俊谭歌朱修锋高新宝陈军
Owner WANXIANG 123 CO LTD
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