A lithium ion battery tab with grid structure design and preparation method thereof

A lithium-ion battery and meshing technology, which is applied to structural parts, secondary batteries, battery pack components, etc., can solve the problems of frequent safety accidents of electric vehicles, users' illegal operations, and faulty battery removal, etc., and achieves a simple structure , good effect and low cost

Active Publication Date: 2022-04-12
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to technical limitations, it is difficult to completely remove the problematic batteries in the production process and users have illegal operations during use, resulting in frequent safety accidents of electric vehicles, of which battery short circuits account for a large part, and there is currently no effective means to solve this problem

Method used

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  • A lithium ion battery tab with grid structure design and preparation method thereof
  • A lithium ion battery tab with grid structure design and preparation method thereof
  • A lithium ion battery tab with grid structure design and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1 This example provides a method for preparing lithium-ion battery tabs, including:

[0047] Prepare the main tab:

[0048]Production of base film layer: Polymer material (PP), conductive material (graphene, D50 is 50nm), dopant (acrylic acid) are mixed according to the mass ratio of 80%, 15%, and 5%, and then uniformly drawn by melting and mixing to prepare the base film layer. film layer, the thickness of the base film layer is made according to 1mm, and the conductivity of the base film layer is 10 -8 S / m.

[0049] Fabrication of the current collector layer: the positive tab is made of aluminum, and the negative tab is made of copper. By means of magnetron sputtering, a current collector layer is plated on both sides of the base film layer. The current collector layer is on the width of the tab. as wide as the basement membrane. The two ends of the current collector layer along the direction of the current path are full-coverage designed full-coverage area...

Embodiment 2

[0053] Example 2 This example provides a method for preparing lithium-ion battery tabs, including:

[0054] Prepare the main tab:

[0055] Production of base film layer: Polymer material (PP), conductive material (graphene, D50 is 50nm), dopant (acrylic acid) are mixed according to the mass ratio of 85%, 5%, and 10%, and then uniformly drawn by melt mixing to prepare the base film layer. film layer, the thickness of the base film layer is made according to 0.8mm, and the conductivity of the base film layer is 10 -12 S / m.

[0056] Fabrication of the current collector layer: the positive tab is made of aluminum, and the negative tab is made of copper. By means of magnetron sputtering, a current collector layer is plated on both sides of the base film layer. The current collector layer is on the width of the tab. as wide as the basement membrane. The two ends of the current collector layer along the direction of the current path are full-coverage designed full-coverage areas, ...

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Abstract

The invention provides a lithium-ion battery tab with a grid structure design and a preparation method thereof. The lithium-ion battery tab includes at least one main tab, and the main tab is a composite layer structure, including at least one base film layer and at least one current collector layer, and the current collector layer covers one side of the base film layer Or the surfaces on both sides; the two ends of the current collector layer along the current path are full coverage areas designed for full coverage of conductive materials, and a gridded area is set in the middle; multiple current collector modules are arranged in the gridded area, each Between the current collector modules, and between the current collector modules and the full coverage area are conducted through grid bridges. When a short circuit occurs inside the battery, the internal resistance of the base film layer will increase with the increase of temperature, releasing heat, causing the grid bridge in the grid area of ​​the main tab to be heated and fused, cutting off the circuit, thereby reducing the risk of serious accidents occur.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a gridded structure design and a manufacturing method of tabs of lithium-ion batteries. Background technique [0002] Lithium-ion batteries have the advantages of small size, large capacity, long service life, low self-discharge rate, no memory effect, and environmental protection. They are currently widely used in commercial vehicles, special vehicles, electric bicycles, energy storage systems, and medical equipment. Due to technical limitations, it is difficult to completely remove the problematic batteries in the production process and users have illegal operations during use, resulting in frequent safety accidents of electric vehicles, of which battery short circuits account for a large part, and there is currently no effective means to solve this problem. Contents of the invention [0003] An object of the present invention is to provide a tab of a lithium-i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/528H01M50/534H01M10/0525
CPCH01M10/0525Y02E60/10
Inventor 李缜娄帅帅王启岁汪涛张沿江张江伟吴洋洋
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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