Battery state of charge voltage hysteresis estimator
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02J-007/00
H02J-007/16
출원번호
UP-0301754
(2005-12-13)
등록번호
US-7570024
(2009-08-24)
발명자
/ 주소
Melichar, Robert J.
출원인 / 주소
Cobasys, LLC
대리인 / 주소
Harness, Dickey & Pierce, P.L.C.
인용정보
피인용 횟수 :
3인용 특허 :
18
초록▼
A battery control module is provided for use with a battery and includes a voltage measuring module that measures battery voltage, a current measuring module that measures battery current, and a state of charge (SOC) module that communicates with said current and voltage measuring modules. In some f
A battery control module is provided for use with a battery and includes a voltage measuring module that measures battery voltage, a current measuring module that measures battery current, and a state of charge (SOC) module that communicates with said current and voltage measuring modules. In some features, the SOC module determines an unfiltered SOC of said battery, a characteristic of said unfiltered SOC, and a modified SOC that is based on said unfiltered SOC and said characteristic. In other features, the SOC module determines first and second reset voltages, compares the battery voltage to the first and second reset voltages, and determines an unfiltered SOC based on said first and second reset voltages and said battery voltage.
대표청구항▼
What is claimed is: 1. A battery control module for use with a battery, comprising: a voltage measuring module that measures battery voltage; a current measuring module that measures battery current; and a state of charge (SOC) module that communicates with said current and voltage measuring module
What is claimed is: 1. A battery control module for use with a battery, comprising: a voltage measuring module that measures battery voltage; a current measuring module that measures battery current; and a state of charge (SOC) module that communicates with said current and voltage measuring modules and that determines a feature of a SOC transient based on a comparison of a measured battery voltage to a first voltage for said battery at an upper reset limit SOC and a second voltage for said battery at a lower reset limit SOC, wherein said first and second voltages are calculated based on an open circuit voltage of said battery, an ohmic resistance of said battery and a polarization voltage for said measured battery voltage, and wherein said SOC module determines an estimated SOC of said battery and a range for said estimated SOC based on a measured battery current and said measured battery voltage, and determines a modified SOC that is based on said estimated SOC, said range and said feature of said SOC transient. 2. The battery control module of claim 1 wherein said SOC module determines said modified SOC based on SOC=socLow+(socHigh-socLow)*(vAvg-hLowAvg)/(hHighAvg-hLowAvg), where socLow is a low SOC value in said range, socHigh is a high SOC value in said range, Vavg is a running average of said measured battery voltage, and HLowAvg and hHighAvg are running averages of said second and first voltages, respectively. 3. A method for determining a state-of-charge (SOC) of a battery, comprising: measuring a battery voltage; measuring a battery current; measuring a battery temperature; determining a first voltage of said battery at an upper reset limit SOC based on an open circuit voltage of said battery, an ohmic resistance of said battery, a polarization voltage for said measured battery voltage, a measured battery current and a battery temperature; determining a second voltage of said battery at a lower reset limit SOC based on said open circuit voltage of said battery, said ohmic resistance of said battery, said polarization voltage for said measured battery voltage, said measured battery current and said battery temperature; determining a feature of a SOC transient based on a comparison of said measured battery voltage to said first and second voltages, and determining a modified SOC of said battery based on said feature of said SOC transient and estimated SOC of said battery. 4. The method of claim 3 wherein said determining said modified SOC employs equation SOC=socLow+(socHigh-socLow)*(vAvg-hLowAvg)/(hHighAvg-hLowAvg), where socLow is a low SOC value in said range, socHigh is a high SOC value in said range, Vavg is a running average of said measured battery voltage, and HLowAvg and hHighAvg are running averages of said second and first voltages, respectively. 5. A battery control module for use with a battery, comprising: voltage measuring means for measuring battery voltage; current measuring means for measuring battery current; and state of charge (SOC) determining means for communicating with said current and voltage measuring means, determining a feature of a SOC transient based on a comparison of a measured battery voltage to a first voltage of said battery at an upper reset limit SOC and a second voltage for said battery at a lower reset limit SOC, wherein said first and second voltages are calculated based on an open circuit voltage of said battery, an ohmic resistance of said battery and a polarization voltage for said measured battery voltage, and wherein said SOC determining means determining an estimated SOC of said battery and a range for said estimated SOC based on a measured battery current and said measured battery voltage, and determining a modified SOC based on said estimated SOC, said range and said feature of said SOC. 6. The battery control module of claim 5 wherein said SOC determining means determines said modified SOC based on equation SOC=socLow+(socHigh-socLow)*(vAvg-hLowAvg)/(hHighAvg-hLowAvg), where socLow is a low SOC value in said range, socHigh is a high SOC value in said range, Vavg is a running average of said measured battery voltage, and HLowAvg and hHighAvg are running averages of said second and first voltages, respectively. 7. The battery control module of claim 1 further comprising a filter that filters said measured battery voltage and outputs a filtered measured battery voltage to said SOC module. 8. The battery control module of claim 1 wherein said feature includes a ratio that corresponds to at least one of a magnitude and a direction of said SOC transient. 9. The battery control module of claim 1 wherein said first and second voltages are calculated based on said measured battery current and a battery temperature. 10. The method of claim 3 further comprising filtering said measured battery voltage prior to determining said feature. 11. The method of claim 3 wherein said feature includes a ratio that corresponds to at least one of a magnitude and a direction of said SOC transient. 12. The battery control module of claim 5 further comprising a filter that filters said measured battery voltage and outputs a filtered measured battery voltage to said SOC determining means. 13. The battery control module of claim 5 wherein said feature includes a ratio that corresponds to at least one of a magnitude and a direction of said SOC transient. 14. The battery control module of claim 5 wherein said first and second voltages are calculated based on said measured battery current and a battery temperature.
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이 특허에 인용된 특허 (18)
York Robert A. (Dillsburg PA), Apparatus and method for determining the current state of charge of a battery by monitoring battery voltage increases ab.
Stich Frederick A. (Wisconsin Rapids WI) Beistle Edward G. (Appleton WI), Method and apparatus for determination of battery run-time in uninterruptible power system.
Sullivan Michael Scott ; Brost Ronald David ; Chen Yaobin ; Eberhart Russell Carley, Method and apparatus for determining battery state-of-charge using neural network architecture.
Tsuji Tadashi,JPX ; Origuchi Masato,JPX ; Sodeno Tsuyoshi,JPX, Method and apparatus of correcting battery characteristic and of estimating residual capacity of battery.
Ullrich, Matthias; Folge, Hans-Walter; Schmitz, Claus, Method for determining the state of charge of rechargeable batteries by integration of the amounts of current flowing during charging and discharging.
Mark William Verbrugge ; Edward Dean Tate, Jr. ; Shawn D. Sarbacker ; Brian James Koch, Quasi-adaptive method for determining a battery's state of charge.
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