Lithium ion battery point bottom connecting piece and preparation method of lithium ion battery

A lithium-ion battery and connecting piece technology, which is applied to battery pack components, circuits, electrical components, etc., to reduce internal resistance, improve welding strength, and reduce false welding.

Inactive Publication Date: 2013-05-22
浙江吉能电池科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technical solution reduces the virtual welding rate from the perspective of the fixture, when multiple tabs are welded to the cap, it is still relatively easy to cause virtual welding, and it is necessary to further overcome the phenomenon of virtual welding

Method used

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  • Lithium ion battery point bottom connecting piece and preparation method of lithium ion battery
  • Lithium ion battery point bottom connecting piece and preparation method of lithium ion battery
  • Lithium ion battery point bottom connecting piece and preparation method of lithium ion battery

Examples

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Effect test

preparation example Construction

[0032] like Figure 5 Shown, a kind of preparation method of lithium ion battery comprises the following steps:

[0033] 1) Process the two surfaces of the nickel-plated steel strip with burrs 2 by mechanical stamping method, and press according to the size of the lithium-ion battery shell 3 to obtain the bottom connection piece of the lithium-ion battery, which is degreased and dried for later use;

[0034] 2) First weld the lithium-ion battery shell 3 to the bottom connection piece of the lithium-ion battery, and then weld the bottom connection piece of the lithium-ion battery to the tab 5 on the battery cell. The welding head 4 will be larger during the welding process. The current is discharged through the burr 2, which can effectively melt the burr 2 in an instant, and firmly weld the bottom connecting piece of the lithium-ion battery to the bottom of the lithium-ion battery case 3 and the tab 5 and the bottom connecting piece of the lithium-ion battery, and then Subsequ...

Embodiment 1

[0037] like figure 1 and figure 2 As shown, the lithium-ion battery dot-bottom connecting piece of the present invention (specifically, the dot-bottom connecting piece for 18650 lithium-ion power battery) includes a connecting substrate 1 and burrs 2 arranged on both sides of the connecting substrate 1, and the burr 2 is a hollow structure glitches. The connecting substrate 1 is disc-shaped, and the burrs 2 on one side of the disc-shaped connecting substrate 1 (that is, the burrs 2 on the upper surface of the disc-shaped connecting substrate 1) are located in the middle of the disc-shaped connecting substrate 1, and the other The burrs 2 on one side (that is, the burrs 2 on the lower surface of the disc-shaped connecting substrate 1 ) are located on the outer periphery of the disc-shaped connecting substrate 1 . There are four burrs 2 arranged in the middle of the disc-shaped connection substrate 1, the four burrs 2 are distributed in a square, and the four burrs 2 are dist...

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Abstract

The invention discloses an lithium ion battery point bottom connecting piece, which comprises a connecting substrate and burrs arranged at both sides of the connecting substrate. According to the invention, as burrs are arranged at the upper and lower surfaces of the connecting substrate, a large current generated in a welding process is discharged through the burrs, which can be effectively melted instantly, and electrode tabs and the lithium ion battery point bottom connecting piece, as well as the lithium ion battery point bottom connecting piece and the bottom of a lithium ion battery housing are firmly fused together, thus effectively overcoming the false welding phenomenon, improving the welding strength, and reducing the internal resistance, so the lithium ion battery point bottom connecting piece is highly efficient and reliable in performance. The invention also discloses a preparation method of a lithium ion battery. A nickel plated steel band is processed by a mechanical stamping method to form burrs on two surfaces; then stamping is carried out to obtain the lithium ion battery point bottom connecting piece; and then point bottom welding is carried out, and subsequent processing is performed to obtain a lithium ion battery, thereby greatly improving the yield.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries and their preparation, in particular to a lithium-ion battery point-bottom connection piece and a preparation method for the lithium-ion battery. Background technique [0002] Rechargeable lithium-ion secondary battery has the characteristics of high specific energy, long cycle life, no memory effect, and has the advantages of safety, reliability and fast charge and discharge, so it has become a hot spot in the research of new power supply technology in recent years. Since lithium-ion batteries are green, environmentally friendly and non-polluting secondary batteries, they meet the major development needs of energy and environmental protection in various countries today, and their usage in all walks of life is increasing rapidly. In recent years, global resources and environmental protection issues have led to a rapid increase in the application of lithium-ion batteries to replace conventional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26
CPCY02E60/12Y02E60/10
Inventor 黄辉吕焕祥张立军毛秦钟甘永平陶新永范明峰
Owner 浙江吉能电池科技有限公司
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