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Wide-temperature-band 12V start-stop battery chemical system

A temperate, start-stop technology, applied in the field of wide-temperature 12V start-stop battery chemical system, can solve the problems of low temperature cold start, high temperature operation life bottleneck, etc.

Inactive Publication Date: 2020-10-30
CAMEL GRP NEW ENERGY BATTERY CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a wide temperature band 12V start-stop battery chemical system to solve the low-temperature cold start and high-temperature operating life bottleneck problems required by the 12V start-stop in the above background

Method used

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Embodiment 1

[0024] 1) A 12V start-stop battery chemical system with a wide temperature range. The positive electrode uses iron phosphate as the raw material, lithium carbonate as the lithium source, and glucose as the C source. After wet mixing ball milling, spray drying, and then high-temperature solid-phase synthesis to obtain olivine type Lithium iron phosphate material, and then the particle size of the ball mill is controlled to 200~300nm to make nano-olivine lithium iron phosphate material.

[0025] 2) A wide temperate 12V start-stop battery chemical system, the negative electrode uses layered artificial graphite A and soft carbon B, A:B=95:5.

[0026] 3) A wide temperate 12V start-stop battery chemical system, the organic solvent of the electrolyte is conventional ethylene carbonate EC, ethyl methyl carbonate DMC and dimethyl carbonate EMC, the ratio is 3: 3: 4; the lithium salt is Lithium hexafluorophosphate and lithium bisfluorosulfonimide, the ratio is 1: 1.2, the concentration ...

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Abstract

The name of the invention is a wide-temperature-band 12V start-stop battery chemical system. The invention belongs to the technical field of automobile start-stop battery systems. The invention mainlysolves the problems that a lithium battery cannot meet the requirements of cold start power at low temperature and the service life attenuation is fast at high temperature. The system is mainly characterized in that a lithium iron phosphate material is a nano lithium iron phosphate material and is coated with carbon, the graphite is modified artificial graphite doped with soft carbon; an electrolyte further comprises lithium bis(fluorosulfonyl) imide, lithium bis(fluorooxalate) phosphate and vinylene carbonate. According to the invention, the positive electrode impedance is reduced, the contact impedance is reduced, the problem of poor lithium ion diffusion is further improved, the high and low temperature operation performance of the battery is improved, the performance requirements of the start-stop battery are realized, the service life and the weight are superior to those of a lead-acid start-stop battery, the purpose of no replacement of the battery for the lifetime is achieved,and the system is mainly used for 12V start-stop lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of automobile start-stop battery system. In particular, it relates to a chemical system of a wide temperate-band 12V start-stop battery. Background technique [0002] Due to environmental pressure, all countries in the world have formulated vehicle exhaust emission requirements in the next few years to gradually reduce CO2 emissions per kilometer. 2 Emissions, in order to meet vehicle exhaust emission requirements, OEMs can only reduce fuel value by improving internal combustion engines and developing HEV (start-stop), PHEV, BEV, etc. It has attracted wide attention from all walks of life. China's double credit policy is a powerful driving force to stimulate the development of new energy vehicles. However, for a long time, fuel vehicles still occupy a dominant position in the market. Therefore, the development of 12V start-stop and 48V start-stop is the only way to reduce the cost of major vehicles. The ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/587H01M4/62H01M10/0525H01M10/0567H01M10/42B82Y30/00
CPCB82Y30/00H01M4/5825H01M4/587H01M4/625H01M10/0525H01M10/0567H01M10/4235Y02E60/10
Inventor 朱彩兵张宝华刘勇石月廖崇静孙光忠
Owner CAMEL GRP NEW ENERGY BATTERY CO LTD
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