Charging device that can optimize charging current of a secondary battery

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United States of America Patent

PATENT NO 11817735
SERIAL NO

16480659

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Abstract

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A charging device of the present invention includes a DC-DC converter, a charging circuit that charges a secondary battery, a power supply voltage detecting circuit that detects an input voltage Ve, an output voltage setting circuit that sets an output voltage of the DC-DC converter, and a charging control section that controls the charging circuit and the output voltage setting circuit based on the input voltage Ve, and the charging control section increases the output voltage of the DC-DC converter by a predetermined voltage in a stepwise manner while monitoring the input voltage Ve, and in a case where the input voltage Ve is decreased to a first threshold voltage Vth1 or less before the output voltage of the DC-DC converter increases to a rated charging voltage, the charging control section keeps the output voltage of the DC-DC converter at a voltage that is one step lower than a voltage at a time point of the case.

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Patent Owner(s)

  • FDK CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukui, Norio Tokyo, JP 31 172
Onaka, Tomoki Tokyo, JP 2 2
Ono, Yukio Tokyo, JP 25 149

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