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Production method for improving consistency of internal resistance of battery

A manufacturing method and battery internal resistance technology, applied in battery pack components, circuits, electrical components, etc., can solve the problems of increasing battery internal resistance, low cycle life, and small conductive area, and achieve the effect of improving internal resistance consistency

Inactive Publication Date: 2010-06-23
SHANDONG SHENGONG BATTERY NEW TECH
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Problems solved by technology

[0002] At present, the widely used process is to use ultrasonic welding to weld aluminum tabs and copper tabs on the positive and negative current collectors respectively, and conduct electricity through the welding points, but its conductive area is small, and it is also subject to welding strength, which is easy False welding or welding through occurs, which increases the internal resistance of the battery. Especially in high current use, unstable welding is likely to cause inconsistent heating of the battery and low cycle life.

Method used

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  • Production method for improving consistency of internal resistance of battery
  • Production method for improving consistency of internal resistance of battery

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Embodiment Construction

[0010] The manufacturing method for improving the battery internal resistance consistency of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0011] Such as figure 1 As shown, the present invention directly cuts out part of the current collector on the current collector as the tab of the pole piece by using a laser, avoiding the internal contact resistance during welding and the welding burr generated by welding, and the current collector directly serves as the tab, and the current does not It needs to be transmitted through the contact point, and the impedance is consistent, which reduces the internal resistance of the battery. Moreover, through program control, the laser cutting machine can automatically adjust the spacing between tabs according to different data models, realize non-equidistant and symmetrical cutting, and make the tabs gather together after winding, which is convenient for subsequent production...

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Abstract

The invention discloses a producing method for improving the consistency of the internal resistance of a battery, which is characterized in that the method is to directly cut partial current collector on a battery current collector by using laser as an electrode lug of a battery electrode plate. The height of burr cut by the laser is less than 0.01m. The invention relates to a brand-new electrode lug mode, which completely solves the insufficient solder problem between nickel and aluminum electrode lugs and the current collector, realizes that the current collector is directly used as the electrode lug and improves the consistency of the internal resistance of the battery as well as the circulating performance and the safety performance.

Description

technical field [0001] The invention relates to a manufacturing method for improving the consistency of battery internal resistance. Background technique [0002] At present, the widely used process is to use ultrasonic welding to weld aluminum tabs and copper tabs on the positive and negative current collectors respectively, and conduct electricity through the welding points, but its conductive area is small, and it is also subject to welding strength. False welding or welding through occurs, which increases the internal resistance of the battery. Especially in high current use, unstable welding is likely to cause inconsistent heating of the battery and low cycle life. Contents of the invention [0003] The purpose of the present invention is to provide a manufacturing method for improving the consistency of battery internal resistance. [0004] The purpose of the present invention is achieved through the following technical solutions: [0005] A manufacturing method fo...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01M50/531
CPCY02E60/12Y02E60/10
Inventor 张伯禹马振忠高永涛黄金辉徐颖胜
Owner SHANDONG SHENGONG BATTERY NEW TECH
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