Lithium secondary battery pack, as well as electronic device, charging system, and charging method using said pack

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United States of America Patent

PATENT NO RE49407
SERIAL NO

16987159

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Abstract

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A lithium secondary battery pack of the present invention includes: a lithium secondary battery including an electrode body formed of a positive electrode and a negative electrode facing each other and a separator interposed therebetween, and a non-aqueous electrolyte; a PTC element; and a protection circuit including a field effect transistor. The lithium secondary battery has an energy density per volume of 450 Wh/L or more, the lithium secondary battery has a current density of 3.0 mA/cm2 or less, and a relational expression (1) and a relational expression (2) below are established where A (mΩ) is an impedance of the lithium secondary battery and B (mΩ) is an impedance of the entire circuit unit of the lithium secondary battery pack excepting the impedance A (mΩ) of the lithium secondary battery:

description='In-line Formulae' end='lead'A≤50 mΩ  (1)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'B/A≤1  (2).description='In-line Formulae' end='tail'

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Patent Owner(s)

Patent OwnerAddress
MAXELL LTDKYOTO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kamizori, Haruki Ibaraki, JP 18 29
Kita, Fusaji Ibaraki, JP 35 486
Yamada, Masayuki Ibaraki, JP 279 3696

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