Lithium ionic cell formation processing method

A lithium-ion battery and formation treatment technology, which is applied in secondary batteries, electrochemical generators, non-aqueous electrolyte storage batteries, etc., can solve problems such as safety problems hindering development, long formation time, and large investment in equipment, so as to save equipment Investment and maintenance costs, shortening of formation time, and the effect of increasing production capacity

Inactive Publication Date: 2008-11-19
赛福能源科技(徐州)有限公司
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Problems solved by technology

[0002] Lithium-ion batteries have the advantages of high energy density, high output voltage, high output power, fast charging and low pollution. With the popularization of green energy, the application range of lithium-ion batteries is becoming wider and wider, but its safety issues have been hindering its development
The above-mentioned chemical conversion treatment method has the problems of long chemical conversion time and large investment in equipment

Method used

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  • Lithium ionic cell formation processing method

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Embodiment

[0031] 1. Fabrication of lithium-ion batteries

[0032] According to mass percentage, 80-98% of lithium iron phosphate, 0.5-2% of conductive additives, 1-4% of polytetrafluoroethylene, with N-methylpyrrolidone or dimethylamide as solvent, at 2000-6000rpm The slurry is adjusted to a slurry under stirring, and the 20um thick aluminum foil is used as a current collector, the slurry is coated on the aluminum foil, and the positive electrode sheet is made into a positive electrode sheet through drying and compacting operations; by mass percentage, 85-92% of MCMB, CMS is used as the negative electrode active material, and 3-11% of KS and SS are used as conductive agents, and 3-11% of polytetrafluoroethylene, polyvinylidene fluoride, and one of polymer resins are used as binders, and N -Methylpyrrolidone or dimethylamide, dimethylacetamide as solvent, stir to make slurry, use 10um thick copper foil as current collector, apply slurry to copper foil, dry and compact and other operatio...

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Abstract

The invention discloses a lithium ion battery formation method, including the following steps: (1) firstly, charging the lithium ion battery with staircase voltage; (2)then, charging the lithium ion battery with heavy constant current; (3)after that, charging the lithium ion battery with staircase voltage; (4)finally, discharging the lithium ion battery in staircase voltage mode step by step or in normal constant current mode. The process is done under minus 20-45 DEG C. the formation method is convenient to operate and simple in process and can effectively improve the safety of the battery; therefore, the lithium ion battery formation method is an effective method. The lithium ion battery formation method can reach the same effect with small electricity formation method, while greatly reducing the formation time, thus greatly improving productivity, saving equipment investment and maintenance cost; therefore the lithium ion battery formation method is of great economic benefits.

Description

technical field [0001] The invention relates to a lithium-ion battery formation treatment method, in particular to a charge-discharge formation treatment method for a lithium iron phosphate lithium-ion battery. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high output voltage, high output power, fast charging and low pollution. With the popularization of green energy, the application range of lithium-ion batteries is becoming wider and wider, but its safety issues have been hindering its development. At present, the treatment method of charge and discharge formation of lithium-ion batteries is: charge the battery soaked by liquid injection with a small current and a constant current between 0.01 and 0.2 times. After the charging voltage is 3.65 ~ 4.5 volts, let the battery enter the constant voltage charging stage, the voltage is kept between 3.65 ~ 4.5 volts, and when the charging current is reduced to 0.001 ~ 0.02 times, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44H01M10/40H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 董明尤志宏
Owner 赛福能源科技(徐州)有限公司
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