Battery management system and driving method thereof
First Claim
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1. A battery management system used to establish a state of charge (SOC) of a battery used in the battery management system, the battery management system comprising:
- a sensing unit to measure a battery voltage; and
a micro control unit (MCU) to measure a first time and a second time, to detect first and second battery voltages that respectively correspond to the first and second times from the battery voltage, to estimate an open circuit voltage (OCV) by the first and second voltages, and to determine the SOC that corresponds to the OCV.
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Abstract
A battery management system to estimate a state of charge of a battery and a driving method thereof includes a sensing unit and a micro control unit. The sensing unit measures a battery voltage. The MCU measures a first time and a second time, detects first and second battery voltages that respectively correspond to the first and second times from the battery voltage, estimates an open circuit voltage by the first and second voltages, and establishes the SOC that corresponds to the OCV.
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12 Claims
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1. A battery management system used to establish a state of charge (SOC) of a battery used in the battery management system, the battery management system comprising:
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a sensing unit to measure a battery voltage; and a micro control unit (MCU) to measure a first time and a second time, to detect first and second battery voltages that respectively correspond to the first and second times from the battery voltage, to estimate an open circuit voltage (OCV) by the first and second voltages, and to determine the SOC that corresponds to the OCV. - View Dependent Claims (2, 3, 4)
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5. A driving method of a battery management system to establish a state of charge (SOC) of a battery used in the battery management system, the driving method comprising:
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when the battery is not charged and/or discharged, measuring a first time and a second time, and detecting a first battery voltage that corresponds to the first time and a second battery voltage that corresponds to the second time; generating a linear equation that includes the first time, the first battery voltage, the second time, and the second battery voltage; and estimating an open circuit voltage (OCV) of the battery by using the linear equation. - View Dependent Claims (6, 7, 8)
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9. A driving method of a battery management system to obtain a state of charge (SOC) of a rechargeable battery, the driving method comprising:
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measuring at least two times; detecting at least two voltages of the rechargeable battery that correspond to respective ones of the at least two times; determining an open circuit voltage (OCV) of the rechargeable battery based on the at least two times and the at least two voltages; and determining the SOC of the rechargeable battery that corresponds to the determined OCV. - View Dependent Claims (10, 11)
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12. A method to obtain a state of charge (SOC) of a rechargeable battery, the method comprising:
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detecting voltage of the rechargeable battery corresponding to time; determining an open circuit voltage (OCV) of the rechargeable battery using an inverse relationship of the time relative to the voltage; and determining the SOC of the rechargeable battery that corresponds to the determined OCV.
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Specification