Battery management system and driving method thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02J-007/00
G01R-031/36
H02H-007/18
출원번호
UP-0902337
(2007-09-20)
등록번호
US-7652449
(2010-02-24)
우선권정보
KR-10-2006-0093589(2006-09-26)
발명자
/ 주소
Tae, Yong-Jun
Choi, Soo-Seok
Lee, Young-Jo
Yun, Han-Seok
Seo, Se-Wook
Lim, Gye-Jong
Kim, Beom-Gyu
Park, Ho-Young
출원인 / 주소
Samsung SDI Co., Ltd.
대리인 / 주소
Bushnell, Esq., Robert E.
인용정보
피인용 횟수 :
3인용 특허 :
23
초록▼
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 uni
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.
대표청구항▼
What is claimed is: 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
What is claimed is: 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. 2. The system of claim 1, wherein the estimation current is generated by cumulatively calculating the current of the battery for a unit of a second period, and by dividing the calculated current of the battery by a time corresponding to the second period. 3. The system of claim 2, wherein the MCU samples the estimation current of the first period, and calculates the average value of the estimation current. 4. The system of claim 3, wherein the MCU calculates the internal resistance of the battery using the following equation: Rb = V 2 - V 1 I ave × 1000 [ m Ω ] where V1 is the battery voltage of the battery in the key-on state, V2 is the voltage of the battery after the first period, and Iave is the average value of the estimation current of the battery. 5. The system of claim 4, wherein the sensor comprises an electric current estimator for comparing the current of the battery to a reference current to produce a comparison result, for cumulatively calculating a deviation based on the comparison result, for dividing the calculated deviation by the time corresponding to the second period, and for generating the estimation current. 6. A method for driving a battery management system managing a battery, said method comprising the steps of: 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. 7. The method of claim 6, wherein the step of calculating the average value of the estimation current of the battery comprises cumulatively calculating a current of the battery for a unit of a second period to produce a calculated result, dividing the calculated result by a time corresponding to the second period, and generating the estimation current of the battery. 8. The method of claim 7, wherein the step of calculating the average value of the estimation current of the battery is performed by sampling the estimation current of the battery for the first period. 9. The method of claim 8, wherein the step of calculating the internal resistance of the battery is performed using the following equation: Rb = V 2 - V 1 I ave × 1000 [ m Ω ] where V1 is the voltage of the battery in the key-on state, V2 is the voltage of the battery after the first period, and Iave is the average value of the estimation current of the battery. 10. The method of claim 6, wherein the step of calculating the average value of the estimation current of the battery is performed by sampling the estimation current of the battery for the first period. 11. The method of claim 10, wherein the step of calculating the internal resistance of the battery is performed using the following equation: Rb = V 2 - V 1 I ave × 1000 [ m Ω ] where V1 is the voltage of the battery in the key-on state, V2 is the voltage of the battery after the first period, and Iave is the average value of the estimation current of the battery. 12. The method of claim 6, wherein the step of calculating the internal resistance of the battery is performed using the following equation: Rb = V 2 - V 1 I ave × 1000 [ m Ω ] where V1 is the voltage of the battery in the key-on state, V2 is the voltage of the battery after the first period, and Iave is the average value of the estimation current of the battery.
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