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Secondary battery charging device, method of charging in secondary battery charging device, photovoltaic generator, method of power generation in photovoltaic generator, photovoltaic-charged secondary battery system, electronic device, and electrical vehicle

  • US 9,853,472 B2
  • Filed: 09/07/2012
  • Issued: 12/26/2017
  • Est. Priority Date: 09/20/2011
  • Status: Active Grant
First Claim
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1. A battery charging device, comprising:

  • a battery pack including a plurality of battery cells connected in series; and

    a control unit configured to;

    estimate an output voltage of a solar battery at which output electrical power of the solar battery becomes a maximum for a measured solar radiation intensity;

    determine, for the estimated output voltage, a number of the plurality of battery cells in the series connection at which the output electrical power of the solar battery remains the maximum; and

    change the number of the plurality of battery cells in the series connection based on the determination.

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