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Battery charging control system

  • US 8,917,058 B2
  • Filed: 01/22/2010
  • Issued: 12/23/2014
  • Est. Priority Date: 01/22/2010
  • Status: Active Grant
First Claim
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1. A battery charging control system comprising:

  • an alternator that operates utilizing kinetic energy of a motor or a wheel of a vehicle and has a variable generation voltage;

    a plurality of batteries having different charging voltages;

    first calculation unit for calculating maximum generation power defined as the highest generation power that said alternator can generate at a charging voltage suitable for each battery, using the rotation speed of said alternator as a parameter;

    second calculation unit for calculating maximum charging power defined as the highest charging power that each battery can accept, using the state of charge of each battery as a parameter;

    obtaining unit for obtaining chargeable power defined as power that can be supplied to each battery from said alternator by comparing said maximum generation power and said maximum charging power;

    selection unit for selecting a battery for which the chargeable power obtained by said obtaining unit is highest among said plurality of batteries; and

    control unit for controlling said alternator in such a way that the battery selected by said selection unit is charged.

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