Simple method for accurately determining a state of charge of a battery, a battery management system using same, and a driving method thereof
First Claim
1. A battery management system, comprising:
- a sensor providing indications of charging and discharging current flowing through a battery, temperature of the battery, terminal voltage of the battery;
a predictor counting the charging and discharging current, and using a measurement model of the battery to estimate a state-of-charge of the battery;
a data rejection unit for generating information associated with errors attributable to a measurement model of the battery, as a function of at least one of the battery temperature, the charging and discharging current, the state-of-charge, and a dynamic of the charging and discharging current; and
a measurement unit making a correction of the state-of-charge in dependence upon the measurement model and the information associated with the errors.
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Abstract
A battery management system using a measurement model modeling a battery, and estimating a SOC (state-of-charge) of the battery, and a battery driving method thereof. The battery management system is constructed with a sensor, a predictor, a data rejection unit, and a measurement unit. The sensor senses a charging and discharging current flowing through the battery, a temperature of the battery, a terminal voltage of the battery. The predictor counts the charging and discharging current, and estimates the state-of-charge of the battery. The data rejection unit generates information associated with an error generated from the measurement model, as a function of at least one of the battery temperature, the charging and discharging current, the state-of-charge, and a dynamic of the charging and discharging current. The measurement unit corrects the estimated state-of-charge of the battery, using the measurement model and the information associated with the error.
47 Citations
42 Claims
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1. A battery management system, comprising:
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a sensor providing indications of charging and discharging current flowing through a battery, temperature of the battery, terminal voltage of the battery; a predictor counting the charging and discharging current, and using a measurement model of the battery to estimate a state-of-charge of the battery; a data rejection unit for generating information associated with errors attributable to a measurement model of the battery, as a function of at least one of the battery temperature, the charging and discharging current, the state-of-charge, and a dynamic of the charging and discharging current; and a measurement unit making a correction of the state-of-charge in dependence upon the measurement model and the information associated with the errors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A simple method for more accurately determining a state-of-charge of a battery, comprising:
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measuring a charging and discharging current flowing through a battery, temperature of the battery, and terminal voltage of the battery; counting the charging and discharging current, and using a measurement model of the battery to make an estimate of the state-of-charge of the battery; generating information associated with errors attributable to a measurement model of the battery, as a function of at least one of the battery temperature, the charging and discharging current, the state of charge, and a dynamic of the charging and discharging current; and making a correction of the estimated state-of-charge of the battery, using the measurement model and the information associated with the error to more accurately determine the state-of-charge of the battery. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 42)
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33. A driving method of a battery management system, comprising:
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measuring a charging and discharging current flowing through a battery, a temperature of the battery, and a terminal voltage of the battery; counting the charging and discharging current, and generating an estimation of a state-of-charge of the battery in dependence upon a measurement model of the battery; generating information associated with an error attributable to a measurement model of the battery, as a function of at least one of the battery temperature, the charging and discharging current, the state-of-charge, and a dynamic of the charging and discharging current; and correcting the estimate of the state-of-charge using the measurement model and the information associated with the error. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41)
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Specification