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Manufacturing method of low-temperature lithium ion battery

A lithium-ion battery and manufacturing method technology, applied in the direction of electrolyte storage battery manufacturing, secondary battery, final product manufacturing, etc., can solve the problems of battery performance degradation, poor low-temperature characteristics, inability to work normally, etc., and achieve high-temperature performance improvement. Effect

Active Publication Date: 2015-01-14
JIANGSU JINYI NEW ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low-temperature characteristics of lithium-ion batteries are poor. When the ambient temperature is lower than 0°C, the performance of the battery will decline significantly or it will not work normally. In a low-temperature environment, it is necessary to equip the battery with a heating plate to heat up to ensure its normal charging and discharging.

Method used

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  • Manufacturing method of low-temperature lithium ion battery
  • Manufacturing method of low-temperature lithium ion battery

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0012] A. Positive sheet production

[0013] The positive electrode material is scaled (LiCoO 2 : Super P: PVDF = 93: 4: 3), mixed with NMP (NMP: weight of solid matter = 810: 1500), and the viscosity of the positive electrode slurry was controlled at 6000 cps. The positive electrode slurry is evenly coated on the surface of the aluminum foil, and the positive electrode sheet is made by drying, rolling, and cutting to the designed process parameters.

[0014] B. Negative sheet production

[0015] Mix the negative electrode material in proportion (C:Super P:SBR:CMC=94:1:2.5:2.5), mix with H 2 O(H 2 O: weight of solid matter=1600:1420) for mixing and stirring, and the viscosity of the negative electrode slurry is controlled at 5000-6000cps. The negative electrode slurry is evenly coated on the surface of the copper foil, and the negative electrode sheet is made by drying, rolling, and cutting to the designed process parameters.

[0016] C. Electrolyte configuration

[0017...

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Abstract

The invention relates to a manufacturing method of a low-temperature lithium ion battery. The low-temperature lithium ion battery adopts a thin and long polar plate and a low-melting-point EC (ethylene carbonate) / EMC (ethyl methyl carbonate) / EB (ethyl butyrate) / toluene compound electrolyte of LiPF6. According to the manufacturing method of the low-temperature lithium ion battery, the low-temperature discharging property of the lithium ion battery is effectively improved; and the battery has an excellent output property in a low-temperature environment of -40 DEG C and can work in the environment of -60 DEG C.

Description

technical field [0001] The invention relates to a method for manufacturing a low-temperature lithium-ion battery. Background technique [0002] Lithium-ion batteries have a wide range of uses due to their high specific energy characteristics, and have been widely promoted and used in consumer electronics, electric vehicles, electric tools, energy storage and other fields. However, the low-temperature characteristics of lithium-ion batteries are poor. When the ambient temperature is lower than 0°C, the performance of the battery will decline significantly or it will not work normally. In a low-temperature environment, it is necessary to equip the battery with a heating plate to heat up to ensure its normal charging and discharging. [0003] The present invention manufactures a low-temperature lithium-ion battery by using thin and long pole plates and a low-melting-point composite electrolyte. The battery can discharge at a rate of C / 20 in a low-temperature environment of -60°...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/056
CPCH01M10/056H01M10/058Y02E60/10Y02P70/50
Inventor 秦学张静夏方吴宏钧
Owner JIANGSU JINYI NEW ENERGY TECH CO LTD