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Smart home lithium ion battery electrolyte and battery

A lithium-ion battery and smart home technology, which is applied to battery electrodes, secondary batteries, circuits, etc., can solve the problems of long-term storage performance that cannot meet the requirements of smart home batteries, electrode active material shedding, side reactions, etc., and achieve good cycle life , Improve electrical conductivity, good compatibility

Active Publication Date: 2017-05-31
江苏众富智能电气研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the side reaction of the electrode active material in contact with the electrolyte, or the shedding of the electrode active material or the dissolution of its own elements, the existing batteries have long-term storage performance and working performance after long-term storage cannot meet the needs of smart home batteries. requirements

Method used

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  • Smart home lithium ion battery electrolyte and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Lithium hexafluorophosphate 2mol / L, ethyl carbonate: dimethyl carbonate = 7:3, composite additive accounts for 5.5% of carbonate volume percentage, fluorine-containing lithium sulfonyl imide, perfluoromethane disulfonate methylene, sulfuric acid Vinyl ester, perfluoromalononitrile=1:2:2:0.5 (volume ratio).

Embodiment 2

[0026] Lithium hexafluorophosphate 4mol / L, ethyl carbonate: dimethyl carbonate = 9:1, composite additives account for 10% of carbonate volume percentage, fluorine-containing lithium sulfonyl imide, perfluoromethane disulfonate methylene, sulfuric acid Vinyl ester, perfluoromalononitrile=1.5:4:4:1 (volume ratio).

Embodiment 3

[0028] Lithium tetrafluoroborate 3mol / L, ethyl carbonate: dimethyl carbonate = 8:2, composite additives accounted for 10% of carbonate volume percentage, fluorine-containing lithium sulfonimide, perfluoromethane disulfonate Methyl ester, vinyl sulfate, perfluoromalononitrile=1.5:4:4:1 (volume ratio).

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Abstract

The invention discloses a long-term storage type lithium ion battery, wherein the negative electrode uses lithium titanate, an electrolyte comprises a conductive lithium salt, a carbonic ester solvent and a composite additive and is characterized in that the concentration of the conductive lithium salt is more than 2 mol / L, the carbonic ester solvent comprises cyclic carbonate, the volume content of the cyclic carbonate accounts for more than 70% the total volume of the carbonic ester solvent, the total content of the composite additive accounts for 5-10% of the volume percent of the carbonic ester solvent, the proportional relation of the volumes V of fluoro methylene methanedisulfonate, ethylene sulfate and fluoro dinitrile is that: the volume V of fluorine-containing lithium sulfimide plus the volume V of fluoro methylene methanedisulfonate is more than the volume V of ethylene sulfate plus the volume V of fluoro dinitrile. The battery is low in interface impedance under the condition of long-term storage, keeps high electric conductivity and long cycle life, and improves the long-term storage property of the battery.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to an electrolyte solution for lithium ion batteries used in smart homes. Background technique [0002] Smart home (English: smart home, home automation) is a residential platform, using integrated wiring technology, network communication technology, security technology, automatic control technology, audio and video technology to integrate home life-related facilities to build efficient residential facilities. A management system related to family schedules improves home safety, convenience, comfort, and artistry, and realizes an environmentally friendly and energy-saving living environment. [0003] Existing smart home systems generally need to be connected to an external power source to work. In many cases, people hope to use some functions of the smart home system without external power supply, such as data reading, signal sending and receiving and other functions....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0569H01M10/0567H01M4/485
CPCH01M4/485H01M10/0525H01M10/0567H01M10/0569Y02E60/10
Inventor 洪泽宇
Owner 江苏众富智能电气研究院有限公司
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