Method and arrangement for determination of the state of charge of a battery
First Claim
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1. A method of determining a state of charge of a battery, comprising:
- performing a model calculation in which a measured battery voltage and a calculated battery voltage are adjusted using feedback;
in a presence of a first operating range of the battery, calculating the state of charge on the basis of the model calculation;
calculating, on the basis of the model calculation, an off-load voltage UR from which the state of charge of the battery is derivable; and
in a presence of a second operating range of the battery, determining the state of charge on the basis of a measurement of a battery current and an off-load voltage that are one of calculated and estimated last, wherein the state of charge of the battery is calculated according to the formula state of charge =f(UR)=(UR−
UR,min)/(UR,max−
UR,min).
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Abstract
Method of determining the state of charge soc of a battery, in particular a starting battery of a motor vehicle; the state of charge being calculated, in a first operating range, on the basis of a model calculation in which a measured and a calculated battery voltage UBatt, UBatt, are balanced, using feedback.
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Citations
15 Claims
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1. A method of determining a state of charge of a battery, comprising:
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performing a model calculation in which a measured battery voltage and a calculated battery voltage are adjusted using feedback;
in a presence of a first operating range of the battery, calculating the state of charge on the basis of the model calculation;
calculating, on the basis of the model calculation, an off-load voltage UR from which the state of charge of the battery is derivable; and
in a presence of a second operating range of the battery, determining the state of charge on the basis of a measurement of a battery current and an off-load voltage that are one of calculated and estimated last, wherein the state of charge of the battery is calculated according to the formula state of charge =f(UR)=(UR−
UR,min)/(UR,max−
UR,min). - View Dependent Claims (2, 3)
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4. A method of determining a state of charge of a battery, comprising:
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performing a model calculation in which a measured battery voltage and a calculated battery voltage are adjusted using feedback; and
in a presence of a first operating range of the battery, calculating the state of charge on the basis of the model calculation;
wherein the state of charge of the battery is calculated according to the formula state of charge =f(UR)=(UR−
UR,min)/(UR,max−
UR,min). - View Dependent Claims (5, 6)
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7. A method of determining a state of charge of a battery, comprising:
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performing a model calculation in which a measured battery voltage and a calculated battery voltage are adjusted using feedback;
in a presence of a first operating range of the battery, calculating the state of charge on the basis of the model calculation; and
in a presence of a second operating range of the battery, determining the state of charge on the basis of a measurement of a battery current and an off-load voltage that are one of calculated and estimated last. - View Dependent Claims (8, 9, 10, 11)
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12. An arrangement for determining a state of charge of a battery, comprising:
a monitoring device that determines the state of charge of the battery by calculating an off-load voltage in a first operating range of the battery, on the basis of a model calculation in which a measured battery voltage and a calculated battery voltage are balanced by feedback, the monitoring device further determining the state of charge of the battery in a second operating range, on the basis of a measurement of a battery current and an off-load voltage that are one of calculated and estimated last. - View Dependent Claims (13, 14, 15)
Specification