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Valve-free fully sealed lithium ionic cell

A lithium-ion battery, fully sealed technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of local high temperature, poor stability, easy moisture absorption of the shell, etc., to ensure long life and good stability. Effect

Inactive Publication Date: 2009-03-25
唐志建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problems of poor stability, local high temperature, a large amount of excess gas, and easy moisture absorption of the existing lithium battery.

Method used

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  • Valve-free fully sealed lithium ionic cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The valveless fully sealed lithium-ion battery is composed of a plastic case 1, a negative pole 3, a cover plate 4, a positive pole 5, a pole piece 7 and an electro-hydraulic inside the plastic case; the positive pole is composed of the following mass percentage materials: LiMn 2 o 4 64.4, LiFePO 4 27.6, water glue 3, conductive graphite 4, conductive carbon black 1. In addition, 1% oxalic acid of the total mass of the above-mentioned raw materials is used, and oxalic acid does not account for the proportion because it will volatilize in the coating film.

[0019] The negative electrode material is composed of the following mass percentages: artificial graphite C 96, hydrogel 3.5, and conductive graphite 0.5.

[0020] The electrohydraulic is composed of raw materials in the following molar ratio: 1MLLiPF6 / EC1:DMC0.8:EMC1:DEC1

Embodiment 2

[0022] Valveless fully sealed lithium-ion battery, the negative electrode material is made of large-particle spherical artificial graphite material, and the diameter of the artificial graphite is 30 microns.

Embodiment 3

[0024] The structure of the valveless fully sealed lithium-ion battery is that the plastic case 1 is a hexahedral structure without reinforcing ribs, the plastic case 1 is covered with a cover plate 4, and there is a hot plate welding 2 between the plastic case 1 and the cover plate 4; the cover plate 4 A negative pole 3 and a positive pole 5 are installed on it; inside the plastic casing 1 there are pole pieces 7 connected to the negative pole 3 and the positive pole 5 respectively.

[0025] The negative pole (3) and the positive pole 5 are installed on the plastic casing 1 through a nut 8 respectively.

[0026] The pole pieces 7 are fixed on the negative pole 3 and the positive pole 5 by rivets 6 .

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Abstract

A valveless fully-sealed lithium ion battery relates to a lithium ion battery and is composed of a plastic shell, a negative pole, a cover plate, a positive pole, pole pieces and electric liquid positioned in the plastic shell. The positive pole is composed of materials in the following mass percentages: LiMn2O4 (62-72), LiFePO4 (18-28), water gel (2-3), conductive graphite (3-5) and conductive carbon black (0.5-1.5); the negative pole is composed of materials in the following mass percentages: artificial graphite C (94-97), water gel (2-6) and conductive graphite (0.3-0.7); and the electric liquid is composed of raw materials in the following molar ratio: LiPF6 (0.5-1.5), EC (0.5-1.5), DMC (0.5-1), EMC (0.5-1.5), and DEC (0.5-1.5). The lithium ion battery solves the problems of the prior lithium ion battery that the stability is poor, and local high temperature and a large amount of excess gas are generated, and a housing is easy to absorb moisture, and the like.

Description

technical field [0001] The invention relates to a battery, in particular to a lithium ion battery. Background technique [0002] We all know that the demand for energy is increasing day by day. In particular, my country has leaped to become a major oil consumer next to the United States, and its requirements for green new energy are very urgent. Judging from the green traffic vehicles of the Beijing 2008 Olympic Games, it has already begun to see clues to the development prospect of new energy. Volkswagen has proposed low-emission clean diesel technology vehicles based on its own superb engine technology; GM focuses on fuel cell vehicles with high cost and complex technology, and Toyota supports hybrid vehicles with large initial investment; with Chinese characteristics, it is based in Beijing cheap, technically realistic pure battery-powered vehicles. China's power lithium-ion battery production technology is no less than that of Japan and other countries in the world. If...

Claims

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Application Information

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IPC IPC(8): H01M10/40H01M4/36H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 唐志建
Owner 唐志建
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