[특허]Battery capacity controller

Honda Motor Co., Ltd.

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Battery capacity controller

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02J-007/00
미국특허분류(USC)	320/132;
출원번호	US-0543192 (2009-08-18)
등록번호	US-8390257 (2013-03-05)
우선권정보	JP-2008-217249 (2008-08-26)
발명자 / 주소	Inoue, Katsuya Ohnuma, Yoshikazu Fujita, Yuji
출원인 / 주소	Honda Motor Co., Ltd.
인용정보	피인용 횟수 : 1 인용 특허 : 7

초록
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A battery capacity controller includes a battery capacity estimating part that estimates the battery capacity of a battery in which an internal resistance is increased in accordance with the decrease of the battery capacity in the vicinity of a prescribed lower limit battery capacity and a battery capacity correcting part that changes, during the discharge of the battery, an estimated battery capacity estimated by the battery capacity estimating part to a proper value in a lower limit side when an internal resistance difference as a difference between th...

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1. A battery capacity controller comprising: a battery capacity estimating part that estimates a battery capacity of a battery in which an internal resistance is increased in accordance with a decrease of the battery capacity in the vicinity of a threshold lower limit battery capacity; anda battery capacity correcting part calculates a present internal resistance value and an internal resistance value of the battery which is at the time of the lower limit battery capacity, calculates an internal resistance difference between the present internal resistance value and the internal resistance value of the battery which is at the time of the lower limit battery capacity, and compares the calculated internal resistance difference with a threshold value, whereinthe battery capacity correcting part changes, during the discharge of the battery, the estimated battery capacity to a proper value which is lower than the estimated battery capacity, when an internal resistance difference between the present internal resistance value of the battery and the internal resistance value of the battery which is at the time of the lower limit battery capacity is less than or equal to the threshold value. 2. The battery capacity controller defined in claim 1, further comprising: a current detecting part that detects a charging and discharging current of the battery;a voltage detecting part that detects a terminal voltage of the battery; anda storing part that stores the terminal voltage when the battery capacity of the battery is the lower limit battery capacity, whereinthe battery capacity correcting part divides a difference between the terminal voltage of the battery detected by the voltage detecting part and the terminal voltage of the battery during the lower limit battery capacity by the value of a discharging current of the battery detected by the current detecting part to calculate the internal resistance difference. 3. The battery capacity controller defined in claim 1, further comprising: a charging and discharging control part that controls the charging and discharging operations of the battery in accordance with the estimated battery capacity, whereinthe charging and discharging control part starts the charging operation of the battery, when the battery capacity correcting part changes the estimated battery capacity to the proper value in the lower limit side. 4. The battery capacity controller defined in claim 1, wherein the proper value in the lower limit side is a value lower than the estimated battery capacity, anda battery capacity value that can output the same continuous output electric power as a continuous output electric power of the battery corresponding to the estimated battery capacity when the internal resistance difference is the threshold value. 5. A battery capacity controller comprising: a battery capacity estimating part that estimates the battery capacity of a battery in which an internal resistance is increased in accordance with the increase of the battery capacity in the vicinity of a threshold upper limit battery capacity; anda battery capacity correcting part calculates a present internal resistance value and an internal resistance value of the battery which is at the time of the upper limit battery capacity, calculates an internal resistance difference between the present internal resistance value and the internal resistance value of the battery which is at the time of the upper limit battery capacity, and compares the calculated internal resistance difference with a threshold value, whereinthe battery capacity correcting part changes, during the charging of the battery, the estimated battery capacity to a proper value which is lower than the estimated battery capacity, when the internal resistance difference between present internal resistance value of the battery and the internal resistance value of the battery which is at the time of the upper limit battery capacity is less than or equal to the threshold value. 6. The battery capacity controller defined in claim 5, further comprising: a current detecting part that detects a charging and discharging current of the battery;a voltage detecting part that detects the terminal voltage of the battery; anda storing part that stores the terminal voltage when the battery capacity of the battery is the upper limit battery capacity, whereinthe battery capacity correcting part divides a difference between the terminal voltage of the battery detected by the voltage detecting part and the terminal voltage of the battery during the upper limit battery capacity by the value of the charging current of the battery detected by the current detecting part to calculate the internal resistance difference. 7. The battery capacity controller defined in claim 5, further comprising: a charging and discharging control part that controls the charging and discharging operations of the battery in accordance with the estimated battery capacity, whereinthe charging and discharging control part starts the discharging operation of the battery, when the battery capacity correcting part changes the estimated battery capacity to the proper value in the upper limit side. 8. The battery capacity controller defined in claim 5, wherein the proper value in the upper limit side is a value higher than the estimated battery capacity, anda battery capacity value that can output the same continuous output electric power as a continuous output electric power of the battery corresponding to the estimated battery capacity when the internal resistance difference is the threshold value. 9. The battery capacity controller defined in claim 1, wherein the battery provided in a vehicle on which an electric motor is mounted as a driving source supplies an electric power to the electric motor,the battery capacity controller includes a traveling resistance estimating part that estimates the traveling resistance of the vehicle, andthe battery capacity correcting part operates when the traveling resistance estimated by the traveling resistance estimating part is a threshold value or higher. 10. The battery capacity controller defined in claim 1, wherein the battery provided in the vehicle on which the electric motor is mounted as the driving source supplies the electric power to the electric motor, andthe battery capacity correcting part operates when the vehicle travels to climb a slope. 11. The battery capacity controller defined in claim 5, wherein the battery provided in the vehicle on which the electric motor is mounted as the driving source supplies the electric power to the electric motor, andthe battery capacity correcting part operates when the vehicle travels to cruise. 12. The battery capacity controller defined in claim 1, wherein the battery capacity correcting part operates when the charging and discharging current of the battery is located within a range of a threshold value. 13. The battery capacity controller defined in claim 1, wherein the battery capacity estimating part estimates the battery capacity of the battery on the basis of the integration of the charging and discharging current of the battery. 14. The battery capacity controller defined in claim 5, wherein the battery provided in a vehicle on which an electric motor is mounted as a driving source supplies an electric power to the electric motor,the battery capacity controller includes a traveling resistance estimating part that estimates the traveling resistance of the vehicle, andthe battery capacity correcting part operates when the traveling resistance estimated by the traveling resistance estimating part is a threshold value or higher. 15. The battery capacity controller defined in claim 5, wherein the battery capacity correcting part operates when the charging and discharging current of the battery is located within a range of a threshold value. 16. The battery capacity controller defined in claim 5, wherein the battery capacity estimating part estimates the battery capacity of the battery on the basis of the integration of the charging and discharging current of the battery.

이 특허에 인용된 특허 (7)

이 특허를 인용한 특허 피인용횟수: 1

Marcicki, James Matthew; Kwon, OuJung; Miller, Theodore James; Yang, Xiao Guang. Battery capacity degradation resolution methods and systems. USP2017129843069.

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Battery capacity controller

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Battery capacity controller

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