Method for producing secondary battery having negative electrode with different surface roughnesses

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United States of America Patent

PATENT NO 11145907
APP PUB NO 20180287214A1
SERIAL NO

15921861

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Abstract

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Provided is a method for producing a non-aqueous electrolyte secondary battery. A negative electrode core of a negative electrode plate has front and back surfaces each with a surface roughness different from the other Rz. In a wound electrode body, a wound negative electrode core-exposed portion is formed at one end portion in the winding axis direction. In the wound negative electrode core-exposed portion, the surface roughness of the negative electrode core-exposed portion on the outer surface side is lower than the surface roughness on the inner surface side. A negative electrode current collector is placed on the outer surface of the wound negative electrode core-exposed portion and the negative electrode current collector is resistance-welded to the wound negative electrode core-exposed portion.

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Patent Owner(s)

Patent OwnerAddress
SANYO ELECTRIC CO LTDJAPAN OSAKA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Matsuda, Tetsuya Hyogo, JP 57 619
Mima, Kazuma Hyogo, JP 10 52
Shirota, Ryosuke Osaka, JP 3 8
Yamada, Tomoyuki Hyogo, JP 94 439

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