Method for producing a lithium ion secondary battery

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10770746
APP PUB NO 20180040911A1
SERIAL NO

15544623

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Abstract

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A method for producing a lithium ion secondary battery in which a positive electrode, a heat-resistant insulating layer provided separator having a heat-resistant insulating layer formed of oxide particles on one surface of a resin porous substrate, and a negative electrode are laminated on one another, and a nonaqueous electrolyte is impregnated in the heat-resistant insulating layer provided separator, includes drying the heat-resistant insulating layer provided separator before laminating so that the water content in the heat-resistant insulating layer provided separator remains in a predetermined range. In the drying, the water content in the heat-resistant insulating layer provided separator is decreased to the predetermined range by controlling the dew point and maintaining the predetermined range after reaching the predetermined range of water content.

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Patent Owner(s)

Patent OwnerAddress
ENVISION AESC JAPAN LTDKANAGAWA 2520012

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Matsumoto, Keisuke Kanagawa, JP 84 516
Matsuzaki, Ikuma Kanagawa, JP 13 34
Miyatake, Kazuki Kanagawa, JP 17 154
Nagano, Kodai Kanagawa, JP 9 37

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