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US 2008/0290834 A1Published application
Battery charger
AssigneeSony Corporation
InventorKoji UMETSU
Life of this patent
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AssigneeSony Corporation
InventorKoji UMETSU
Estimating the term…
A battery charger for charging a plurality of secondary batteries is provided. The charger is configured to be connected to a power supply circuit and configured so that an output of the circuit is connected to the batteries. The battery charger includes a first switch for connecting the batteries in series, a second switch to selectively connect a first polarity terminal of a first secondary battery having a highest electric potential, a DC-DC converter having a first and second polarity input terminals, the first polarity input terminal being to be connected to the first polarity terminal via the second switch, the second polarity input terminal being to be connected to a second polarity terminal of a second secondary battery having a lowest electric potential, an external power supply output terminal connected to an output terminal of the DC-DC converter, and a controller for controlling the first and second switches.
A battery charger for charging a plurality of secondary batteries, the battery charger being configured to be connected to a power supply circuit for converting an AC input to a DC output, and configured so that an output of the power supply circuit is connected to the plurality of secondary batteries, the battery charger comprising:
A battery charger for charging a plurality of secondary batteries and deriving a DC power generated by a DC-DC converter to an external DC power supply terminal, the battery charger being configured to be connected to a power supply circuit for converting an AC input to a DC output, and configured so that an output of the power supply circuit is connected to the secondary batteries, the battery charger is controlled by processing steps comprising:
Dependencies are inferred from the claim text.