Lithium ion battery with high multiplying factor

A lithium-ion battery, high-rate technology, applied in battery electrodes, secondary batteries, battery pack components, etc., can solve problems such as no discharge, and achieve the effects of improving discharge rate, good safety, and simple manufacturing process

Inactive Publication Date: 2006-08-16
深圳市力多威电池有限公司
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Problems solved by technology

[0004] However, the discharge rate of the existing lithium-ion batteries generally can only reach 1-3C current, basically no electricity can be discharged when the current is above 3C, while the general electric tool requires the discharge rate to be above 5C, and the flying toy requires the discharge rate to reach Above 7C, model airplane toys require the discharge rate to reach above 12C, for this reason, the rate discharge performance of the lithium-ion battery needs to be further improved

Method used

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  • Lithium ion battery with high multiplying factor
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  • Lithium ion battery with high multiplying factor

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Embodiment Construction

[0031] Implementation 1

[0032] Taking the manufacturing process of 100-2500mAh high-rate lithium-ion battery as an example to illustrate, the battery structure is as follows: figure 1 As shown, the production of the battery is carried out as follows:

[0033] The preparation of positive electrode slurry: N-dimethylpyrrolidone (NMP) was used as solvent, and the active material was lithium cobaltate (LiCoO 2 ), the conductive agent is a mixture of super conductive carbon black (Super P) and conductive graphite (KS-6), the binder is polyvinylidene fluoride (PVDF), and NMP is based on the particle size and particle size distribution of lithium cobaltate used etc. are added, and the addition ratio is between 45% and 75%. The ratio used in this embodiment is: LiCoO 2 :SuperP:KS-6:PVDF:NMP=80:7:7:6:55. First LiCoO 2 , Super P, and KS-6 are dispersed and mixed under the protection of inert gas, and the conductive agent is evenly dispersed in LiCoO 2 Particle surface; then add P...

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Abstract

The invention uses the especially selected material as the material of anode, cathode and additive to increase the discharge current from 1-3C up to 12-15C. Wherein, said anode coating mixture is composed of 75-93% by weight active substance, 1-20% by weight conducting agent and 2-9% by weight adhesive. The active substance and the conducting agent are pre mixed by a specially mixing process of dry powder. The said cathode coating mixture is composed of 90-97% by weight active substance, 0-3% by weight conducting agent and 2-6% by weight adhesive, and its active substance and conducting agent are pre mixed by a specially mixing process of dry powder. On the surface of diaphragm, polymer viscosity particulates are coated. The electrolyte is a special electrolyte where a conducting agent is added. The ratio of capacitances under 5C, 7C, 10C, and 15C discharge scale factor to 1C capacitance can respectively reach 98%, 96%, 90%, and 86%.

Description

technical field [0001] The invention relates to a high rate lithium ion battery. Background technique [0002] Since the large-scale production of lithium-ion batteries in 1990, it has rapidly occupied many market fields with superior electrical performance and variable appearance advantages that are incomparable to other secondary batteries (lead-acid batteries, nickel-metal hydride batteries, nickel-cadmium batteries). Has developed rapidly. It has been widely used in mobile phones, notebook computers, PDAs, video cameras, digital cameras, mobile DVD, MP3 and other fields, and has become an indispensable part of various modern mobile communication equipment and electronic equipment. [0003] However, with the update and development of technology, the market has put forward higher requirements for mobile electronic devices, such as thinner, lighter, arbitrary shape, higher energy density, and higher power density. Nickel-cadmium and nickel-metal hydride batteries have bee...

Claims

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Application Information

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IPC IPC(8): H01M10/36H01M10/40H01M4/58H01M4/48H01M4/62H01M2/16H01M4/13H01M10/0525H01M50/411H01M50/449H01M50/457
CPCY02E60/122Y02E60/10
Inventor 雷远兵黄正耀
Owner 深圳市力多威电池有限公司
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