Battery management system and driving method thereof
First Claim
1. A battery management system, comprising:
- a sensor for sensing a voltage and a current of a battery, and for generating an estimation current of the battery using a result of cumulatively calculating the battery current by a unit of a predetermined period; and
a micro control unit (MCU) for receiving the voltage of the battery and the estimation current of the battery, for setting a voltage of the battery in a key-on state as a first voltage, for setting a voltage of the battery after a first period, which is set according to a condition of controlling a vehicle, as a second voltage, and for calculating an internal resistance of the battery using a difference between the first and second voltages and an average value of the estimation current.
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Abstract
In a battery management system and a driving method thereof, the system includes a sensor and a micro control unit (MCU). The sensor senses a voltage and a current of a battery, and generates an estimation current of the battery using a result of cumulatively calculating the battery current by a unit of a predetermined period. The MCU receives the battery voltage and the estimation current, sets a voltage of the battery in a key-on state as a first voltage, sets a voltage of the battery after a first period as a second voltage, and calculates an internal resistance of the battery using a difference between the first and second voltages and an average value of the estimation current.
63 Citations
12 Claims
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1. A battery management system, comprising:
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a sensor for sensing a voltage and a current of a battery, and for generating an estimation current of the battery using a result of cumulatively calculating the battery current by a unit of a predetermined period; and a micro control unit (MCU) for receiving the voltage of the battery and the estimation current of the battery, for setting a voltage of the battery in a key-on state as a first voltage, for setting a voltage of the battery after a first period, which is set according to a condition of controlling a vehicle, as a second voltage, and for calculating an internal resistance of the battery using a difference between the first and second voltages and an average value of the estimation current. - View Dependent Claims (2, 3, 4, 5)
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6. A method for driving a battery management system managing a battery, said method comprising the steps of:
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setting a voltage of the battery in a key-on state as a first voltage; setting a voltage of the battery after a first period as a second voltage; calculating an average value of an estimation current of the battery for the first period; and calculating an internal resistance of the battery using a difference between the first and second voltages and the average value of the estimation current. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification