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A kind of manufacturing method of low temperature lithium ion battery

A technology of lithium-ion batteries and manufacturing methods, which is applied in the manufacture of electrolyte batteries, secondary batteries, final product manufacturing, etc., can solve the problems of battery performance degradation, poor low-temperature characteristics, and failure to work normally, and achieve the goal of improving low-temperature working performance Effect

Active Publication Date: 2017-01-25
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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  • A kind of manufacturing method of low temperature lithium ion battery
  • A kind of manufacturing method of low temperature lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

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 present invention relates to a kind of manufacturing method of low-temperature lithium ion battery, and it adopts EC (ethylene carbonate) / EMC (methyl ethyl carbonate) / EB (ethyl butyrate) / toluene low-melting point composite electrolysis of thin long pole plate, LiPF6 Liquid, which effectively improves the low-temperature discharge characteristics of lithium-ion batteries. The battery has excellent output performance in a low-temperature environment of -40°C and can work in an environment of -60°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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Patent Type & Authority Patents(China)
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
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