High-energy density battery negative electrode tab and fabrication method thereof

A technology with high energy density and production method, which is applied in the field of high-polymer lithium-ion power batteries, can solve the problems of weak welding and difficult welding, and achieve the effects of firm and reliable welding, stable laser welding, and consistent metal components

Inactive Publication Date: 2018-10-12
连云港海创电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Third, in the battery assembly process, the welding of nickel-plated copper to the parallel copper poles is not strong and the welding is difficult. This is because there is a nickel-plated layer on the nickel-plated copper surface.

Method used

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  • High-energy density battery negative electrode tab and fabrication method thereof
  • High-energy density battery negative electrode tab and fabrication method thereof
  • High-energy density battery negative electrode tab and fabrication method thereof

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Embodiment

[0037] A high-energy-density battery negative tab, which sequentially includes a copper nickel-plated metal tab 3, a welding lap area 5, and an aluminum metal tab 4 for transfer, and a PP polymer is fixed on the copper nickel-plated tab 3 Propylene modified resin 1. like figure 2 shown. image 3 Schematic diagram of the cross-section of the welding overlap area, in image 3 Medium 6 laser welding melting point.

[0038] The manufacturing method of the above-mentioned negative electrode tab comprises the following steps:

[0039] 1) According to the width of the nickel-plated copper lug, select the aluminum material with the same width and cut it to the required length, and use the ZL-A metal sheet material fixed-length cutting machine to complete it;

[0040] 2) Position the nickel-plated copper lug with PP polypropylene modified resin on the mold, position the aluminum metal sheet on the nickel-plated copper, and overlap the aluminum metal sheet and the nickel-plated cop...

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Abstract

The invention discloses a high-energy density polymer lithium ion power battery negative electrode tab. The high-energy density polymer lithium ion power battery negative electrode tab sequentially comprises a copper-plated nickel metal sheet tab, a welding overlap joint region and an aluminum metal sheet for connection, wherein PP polypropylene modified region is fixedly arranged on the copper-plated nickel metal sheet tab. During fabrication, an aluminum material is cut to required length according to demand, the copper-plated nickel tab is positioned on a die, so that the aluminum metal sheet is positioned onto copper-plated nickel, and aluminum metal sheet and the copper-plated nickel are overlapped to form the welding overlap joint region; and two types of metal are rapidly molten bylaser welding equipment so that the two types of metal are pasted. By the negative electrode tab, the integral energy density index of a battery pack is improved, the material density is 2.7g/cm<3>, and the whole weight of the power battery is reduced by 6kg or above; the problem of series and parallel welding of the power battery in subsequent assembly is solved; and after the aluminum sheet is connected with the copper-plated nickel, subsequent welding with an aluminum pole post becomes easier and reliable, the metal constituents are consistent, a welding point after welding is firm to forma whole, and a key effect on prolonging the service lifetime of the battery is achieved.

Description

technical field [0001] The invention relates to the technical field of high-polymer lithium-ion power batteries, in particular to a high-energy-density battery negative electrode tab and a manufacturing method thereof. Background technique [0002] In the "New Energy Automobile Industry Development Plan", the state proposes to vigorously develop the industry and promote the development and application of new energy technologies, especially the polymer soft-pack lithium-ion power batteries (hereinafter referred to as power batteries) used in new energy vehicles. Its light weight, high energy density, superior safety and other performances have attracted more and more attention from manufacturers, but the use of power batteries in new energy passenger vehicles has just started after all, and there are still many problems to be solved to improve energy density and safety performance is an important part of it. [0003] The energy density of the power battery is a key parameter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M10/0525H01M50/531
CPCH01M10/0525H01M50/531Y02E60/10
Inventor 李学兵黄桂东汪如娟周佃国季莹莹王莹高正林滕布军
Owner 连云港海创电子科技有限公司
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