Secondary battery charging system and method, and battery pack

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United States of America Patent

PATENT NO 9866052
SERIAL NO

14775699

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Abstract

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Even after the battery reaches the last stage of the end of life, the use can be continued. A charging system includes battery pack and charger. During the charge of lithium-ion secondary battery, charge control unit calculates the full charge capacity maintaining rate, sets a first charge current value on the basis of the full charge capacity maintaining rate, and charges the battery. When lithium-ion secondary battery reaches the last stage of the end of life, charge control unit sets a second charge current value lower than the first charge current value set based on the full charge capacity maintaining rate, and charges the battery.

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Patent Owner(s)

Patent OwnerAddress
PANASONIC ENERGY CO LTD1-1 MATSUSHITA-CHO MORIGUCHI-SHI OSAKA 570-8511

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujikawa, Masato Osaka, JP 92 1409
Honoki, Kenichi Osaka, JP 3 33
Yuasa, Shin-Ichi Kyoto, JP 5 88

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