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Lithium ion storage battery formation method

A chemical formation method and battery technology, which are applied in non-aqueous electrolyte batteries, electrolyte battery manufacturing, battery pack components, etc., can solve problems such as affecting battery life and gas can not be released, and improve the formation of dense SEI film, low cost , Improve the effect of cycle life

Inactive Publication Date: 2012-03-14
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production of lithium-ion batteries is sealed first and then formed. The gas generated during the formation process cannot be released, which will eventually affect the battery life.

Method used

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  • Lithium ion storage battery formation method
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  • Lithium ion storage battery formation method

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0020] The schematic diagram of this chemical synthesis method can be found in figure 1 , the gas release valve 7 is installed on the pole 10 of the lithium ion battery 8 with the liquid injection hole 9 .

[0021] The steps of this chemical formation method are:

[0022] 1. Formation preparation

[0023] 1. Prepare the vent valve

[0024] see figure 2 The valve body 1 with stepped holes is made of stainless steel material, the holes at both ends of the valve body are processed into partial threads, and the air-liquid separation membrane 2 of breathable PP / PE / PP three-layer composite film material is sealed and pasted on the valve body On a section of the small hole, a through hole is punched on...

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Abstract

The invention relates to a lithium ion storage battery formation method, which comprises the following steps of: formation preparation: installing an air escape valve on a liquid injection hole-carrying terminal post of a battery, and connecting the battery to a formation device; parameter setting and formation starting: determining formation charge and discharge parameters according to parameters of lithium ion battery current, voltage and time, carrying out charge and discharge cycling for 3-5 times and stopping charging and discharging; unlatching or sealing a sealing plug and a valve body of an air escape valve according to internal pressure of the battery during the process of battery formation; formation accomplishment: stopping battery charge and discharge by the formation device and breaking a battery formation cable; placing the battery with the air escape valve in a drying compartment with humidity being less than 5%; dismantling the air escape valve, and sealing the liquid injection hole to complete formation. According to the formation method provided by the invention, the liquid injection hole of the battery is equipped with the air escape valve to release superfluous gas of the battery, prevent the electrolyte from overflowing and external water from introducing, enhance the generation of a compact SEI membrane during the formation process of the lithium ion storage battery and raise cycle life of the battery. The formation method is simple and has characteristics of high efficiency and low cost.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and relates to a formation method of lithium ion batteries. Background technique [0002] Lithium-ion battery has the outstanding advantage of high specific energy, its specific energy is twice that of nickel-hydrogen batteries and four times that of nickel-cadmium batteries, and it has successively replaced the existing nickel-cadmium batteries and nickel-hydrogen batteries. With the development of electronic technology, higher requirements are placed on the life of lithium-ion batteries. Optimized lithium-ion battery formation technology can effectively improve battery life. [0003] The formation of lithium-ion batteries is a method of charging and discharging the battery after injecting the electrolyte, forming a layer of SEI film on the surface of the negative electrode to protect the active metal lithium in the negative electrode from reacting with the electrolyte. At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M2/12
CPCY02E60/10Y02P70/50
Inventor 谭玲生崔振海白杨韩立明冯婵李志壮吴静
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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