Lithium ion battery tab with gridding structure design, and preparation method thereof

A lithium-ion battery, grid technology, applied in the direction of secondary batteries, structural parts, battery pack parts, etc., can solve the problems of frequent electric vehicle safety accidents, illegal operation by users, and removal of defective batteries, and achieve a simple structure. , The effect of reducing serious accidents and facilitating welding

Active Publication Date: 2021-02-05
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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  • Lithium ion battery tab with gridding structure design, and preparation method thereof
  • Lithium ion battery tab with gridding structure design, and preparation method thereof
  • Lithium ion battery tab with gridding 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 gridding structure design, and a preparation method thereof. The lithium ion battery tab comprises at least one main tab, the main tab is of a composite layer structure and comprises at least one base film layer and at least one current collector layer, and the current collector layer covers one side surface or two side surfaces of the base film layer; two ends of the current collector layer along a current path are full-coverage areas designed by full coverage of a conductive material, and a gridding area is arranged in the middle of thecurrent collector layer; and a plurality of current collector modules are arranged in the gridding area, and the current collector modules are communicated through gridding bridges, and the current collector modules and the full coverage area are communicated through gridding bridges. When a short circuit occurs in the battery, the internal resistance of the base film layer can be increased alongwith the rise of the temperature, and heat is released, so that the grid bridge in the gridding area of the main tab is heated and fused, the circuit is cut off, and the occurrence of serious accidents is reduced.

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 Applications(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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