Energy storage device for a motor vehicle
First Claim
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; and
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 a 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,the first characteristic resistance curve and the second characteristic resistance curve have precisely one intersection point, andthe first characteristic voltage curve and the second characteristic voltage curve do not intersect at any point between discharge and full charge of said first and second electrical energy stores.
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Accused Products
Abstract
A motor vehicle energy storage device includes a first electrical energy store characterized by a first characteristic voltage curve defining the open-circuit voltage of the first energy store depending on the relative charge state and by a first characteristic resistance curve defining the internal resistance of the first energy store relevant for a charge process of the energy store, and a second electrical energy store connected in parallel and characterized by a second characteristic voltage curve defining the open-circuit voltage of the second energy store depending on the relative charge state and by a second characteristic resistance curve defining the internal resistance relevant for a charge process of the second energy store. The voltage value ranges covered by the first characteristic voltage curve and the second characteristic voltage curve partially overlap, and the first and second characteristic resistance curves and the second characteristic resistance curve have exactly one intersecting point.
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Citations
6 Claims
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1. An energy storage device for a motor vehicle, comprising:
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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; and 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 a 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, the first characteristic resistance curve and the second characteristic resistance curve have precisely one intersection point, and the first characteristic voltage curve and the second characteristic voltage curve do not intersect at any point between discharge and full charge of said first and second electrical energy stores. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification