Injection method for lithium battery

A lithium battery and lithium ion battery technology, applied in battery pack components, circuits, electrical components, etc., can solve the problems of reducing the limited volume of battery shells and the impact of battery safety, shortening the time of moisture contact, controlling absorption, The effect of shortening the injection process

Inactive Publication Date: 2011-01-12
泉州市永明红兴红科技发展有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

It is not difficult to see from this that the resting area plays a very important process. The length of standing time is related to the absorption of the electrolyte. The battery that absorbs the electrolyte takes a short time, while the battery that absorbs poorly takes a long time. In the past, the battery has been exposed to the air for a long time, absorbing a large amount of water and impurities, which has a great impact on the safety of the battery
Especially in the liquid injection process, there is a process of pressurization. This method has certain defects. Gas must enter the battery case after pressurization. This part of the air reduces the limited volume in the battery case, making it impossible to absorb into the battery. More electrolyte volume

Method used

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  • Injection method for lithium battery
  • Injection method for lithium battery

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Embodiment 1

[0032] This example illustrates that the present invention provides a kind of liquid injection method of lithium-ion battery

[0033] 1. Preparation of battery

[0034] (1) Preparation of positive electrode

[0035] Mix 143 grams of positive electrode active ingredient LiFePO4, 6.4 grams of conductive agent SP, 9.55 grams of binder polyvinylidene fluoride PVDF, and 262 grams of N-methylpyrrolidone, and then stir in a vacuum mixer to form a uniform positive electrode slurry.

[0036] The slurry is evenly coated on 18um aluminum foil, then dried at 120°C, rolled, and cut into strips to obtain a positive electrode with a size of 1540×55×0.167mm, which contains 26.4 grams of active components LiFePO4 (lithium iron phosphate) .

[0037] (2) Preparation of negative electrode

[0038] 53.2 grams of active ingredient natural graphite, 1.48 grams of acetylene black, 1.77 grams of conductive agent SP (Chinese name of SP: sodium polydisulfide dipropane sulfonate), 2.65 grams of binder...

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Abstract

The invention discloses an injection method for a lithium battery. The method comprises a step of injecting electrolyte into a vacuumized battery shell. In the method, repeated vacuumization is performed in the presence of inert gas so that the electrolyte is completely absorbed in the battery and the electrolyte is supplemented finally. In the method, the original pressurizing process is canceled, the influence of gas on the electrolyte absorption is avoided, the exposure time of the battery in the air is shortened and the battery capacity is improved.

Description

technical field [0001] The invention relates to a liquid injection method for a lithium battery manufacturing method, in particular to a liquid injection method for the lithium battery. technical background [0002] With the rapid development of science and technology and economy, the functions of electronic products in the market are becoming more and more powerful, and the shape and size requirements are getting smaller and lighter. Lithium-ion batteries have the advantages of small size, high energy, high working voltage, no environmental pollution, long cycle life, and wide operating temperature range. They are widely used in mobile phones, notebook computers, digital cameras and other electronic products, and even in automobiles. superior. Therefore, the requirements for small size and light weight of electronic products are reflected in the lithium batteries that provide power, and the requirements for lithium-ion batteries are getting higher and higher, especially li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/36H01M50/609
CPCY02E60/10
Inventor 庄志光
Owner 泉州市永明红兴红科技发展有限公司
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