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Energy Storage Device for a Motor Vehicle

  • US 20130252035A1
  • Filed: 05/28/2013
  • Published: 09/26/2013
  • Est. Priority Date: 11/29/2010
  • Status: Active Grant
First Claim
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1. An energy storage device for a motor vehicle, comprising:

  • a first electrical energy store, which is characterized by a first characteristic voltage curve defining an open-circuit voltage of the first electrical energy store depending on a relative charge state of the first electrical energy store, and by a first characteristic resistance curve defining an internal resistance of the first electrical energy store of relevance for a charging process of the first electrical energy store depending on the relative charge state of the first electrical energy store;

    a second electrical energy store connected in parallel to the first electrical energy store, and which is characterized by a second characteristic voltage curve defining the open-circuit voltage of the second electrical energy store depending on the relative charge state of the second electrical energy store, and by a second characteristic resistance curve defining the internal resistance of the second electrical energy store of relevance for a charging process of the second electrical energy store depending on the relative charge state of the second electrical energy store, wherein;

    a voltage value range which is covered by the first characteristic voltage curve and a voltage value range covered by the second characteristic voltage curve partially overlap; and

    the first characteristic resistance curve and the second characteristic resistance curve have precisely one intersection point.

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