Methods for determining the charge state and/or the power capacity of charge store
First Claim
1. A method for determining at least one of a state of charge and an operability of a charge accumulator in accordance with an estimate, comprising:
- taking into account in the estimate information obtained at at least two different operating points of the charge accumulator;
executing at least an open-circuit voltage operation and a model-based estimation operation; and
determining the state of charge in accordance with information obtained in each of the open-circuit voltage operation and the model-based estimation operation.
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Accused Products
Abstract
Methods are described for determining the state of charge and/or the operability of a charge accumulator using estimates. The information, which is obtained at a least two different operating points or operating conditions of the energy accumulator, is taken into account in the estimates. The estimates are carried out with regard to an instantaneous and/or future state of charge and/or an instantaneous and/or future operability of the charge accumulator. Different methods are executed, depending on the operating point or operating condition. The methods may be run in a processor of a control unit.
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Citations
13 Claims
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1. A method for determining at least one of a state of charge and an operability of a charge accumulator in accordance with an estimate, comprising:
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taking into account in the estimate information obtained at at least two different operating points of the charge accumulator;
executing at least an open-circuit voltage operation and a model-based estimation operation; and
determining the state of charge in accordance with information obtained in each of the open-circuit voltage operation and the model-based estimation operation. - View Dependent Claims (2, 4, 5, 6)
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3. A method for determining at least one of a state of charge and an operability of a charge accumulator in accordance with an estimate, comprising:
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taking into account in the estimate information obtained at at least two different operating points of the charge accumulator; and
performing an estimation in accordance with at least one of;
at least one of an instantaneous state of charge and a future state of charge, and at least one of an instantaneous operability of the charge accumulated and a future operability of the charge accumulator.
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7. A method for determining at least one of a state of charge and an operability of a charge accumulator in accordance with an estimate, comprising:
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taking into account in the estimate information obtained at at least two different operating points of the charge accumulator; and
implementing a state estimate and a parameter estimate;
wherein an open-circuit voltage operation and a model-based estimation operation are used for the state estimate and the parameter estimate.
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8. A method for determining at least one of a state of charge and an operability of a charge accumulator in accordance with an estimate, comprising:
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determining a state variable and a state parameter from the following measured variables;
a battery voltage, a battery current, and a battery temperature according to a first operation;
determining an additional state variable and an additional sate parameter according to a second, model-based operation;
obtaining a correction variable from at least one of the state variable, the additional state variable, the state parameter, and the additional state parameter;
calculating the state of charge in accordance with at least one of the state variable and the additional state vehicle; and
predicting the operability of the charge accumulator and determining the battery voltage in accordance with at least one of the state variable and the additional state variable and at least one of the state parameter and the additional state parameter. - View Dependent Claims (9)
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10. A device for determining at least one of a state of charge and an operability of a charge accumulator in accordance with an estimate, comprising:
an arrangement for taking into account in the estimate information obtained at at least two different operating points of the charge accumulator to perform at least an open-circuit voltage operation and a model-based estimation operation, and to determine the state of charge in accordance with information obtained in each of the open-circuit voltage operation and the model-based estimation operation. - View Dependent Claims (11)
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12. A device for determining at least one of a state of charge and an operability of a charge accumulator in accordance with an estimate, comprising:
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a determining arrangement to determine a state variable and a state parameter from at least one of a battery voltage, a battery current, and a battery temperature according to a first operation, and to determine an additional state variable and an additional state parameter according to a second, model-based operation;
an obtaining arrangement to obtain a correction variable from at least one of the state variable, the additional state variable, the state parameter, and the additional state parameter;
a determining and predicting arrangement to determine the state of charge in accordance with at least one of the state variable and the additional state variable, to predict the operability of the charge accumulator, and to determine the battery voltage in accordance with at least one of the state variable and the additional state variable and at least one of the state parameter and the additional state parameter. - View Dependent Claims (13)
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Specification