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Method for manufacturing lithium ion battery lug

A technology for a lithium ion battery and a manufacturing method, applied in the field of secondary lithium ion batteries, can solve problems such as increasing the internal resistance of battery connection, and achieve the effects of reducing the internal resistance of the connection, reducing the connection links, and improving the rate discharge performance

Inactive Publication Date: 2012-02-01
JIANGSU LENENG BATTERY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tabs of pre-heated tab glue and the laminated multi-layer tabs are connected together by riveting or ultrasonic welding, which will inevitably increase the connection internal resistance of the battery

Method used

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  • Method for manufacturing lithium ion battery lug
  • Method for manufacturing lithium ion battery lug
  • Method for manufacturing lithium ion battery lug

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take LiFePO 4 Add 85~93 parts of active material powder to the planetary ball mill, add 2~5 parts of Super P conductive agent, 2~5 parts of ks-6 conductive agent, 1~8 parts of binder 1, 0.5~6 parts of binder 2 , 80~120 parts of NMP organic solvent, after being fully mixed in a planetary ball mill, it is made into a uniformly mixed positive electrode slurry. The configured positive electrode slurry is evenly coated on the 15um thick aluminum foil through the gap coating part on the experimental small coating machine, wherein the part coated with the positive electrode slurry is the positive electrode counter electrode part, and the part not coated with the positive electrode slurry Part is the ear part; the aluminum foil is coated with a total of 2um thick nano-carbon pre-coating (both sides) in advance to make a pole piece, and the double-sided dressing of the pole piece, the surface density of the double-sided dressing is 0.02g / cm 2 , Roll the pole piece to 2.1g / cm 3...

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PUM

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Abstract

The invention discloses a method for manufacturing a lithium ion battery lug, and the method comprises the following steps: 1) manufacturing a positive pole; 2) manufacturing a negative pole; 3) stacking up pole cores; 4) carrying out thermocompression bonding on a lug; 5) carrying out thermocompression recoatin on the lug; and 6) packaging the obtained product. By using the method disclosed by the invention, the internal connection resistance of the lug can be effectively reduced from 1.2 m ohm (an original internal resistance) to 0.85 m ohm; and meanwhile, the rate discharge performance of the lug is greatly improved, through taking a discharge capacity of 0.5 C as a standard capacity, 1 C discharge capacity is increased to 100% from 99.6%, 5 C discharge capacity is increased to 99.6% from 97.3%, and 10 C discharge capacity is increased to 99.4% from 92.1%.

Description

technical field [0001] The present invention relates to the field of secondary lithium ion batteries, in particular, to a method for reducing the connection internal resistance of soft-packed lithium ion batteries, and more specifically, a method for reducing the connection between battery cells and tabs to achieve A method to reduce the internal resistance of the connection. Background technique [0002] At present, lithium-ion batteries have been widely used in various fields, such as portable phone batteries, notebook batteries, portable electric tool batteries, etc., which are common in daily life. With the increase in the popularity of electric vehicles, lithium-ion batteries have gradually replaced nickel-metal hydride batteries due to their excellent mass energy density and long service life, and have become the first choice for electric vehicle batteries. [0003] As electric vehicle batteries, there are mainly the following types: cylindrical batteries, square meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M2/26H01M4/139
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 丁建民
Owner JIANGSU LENENG BATTERY INC
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