Title:
MAXIMUM INPUT/OUTPUT POWER ESTIMATING DEVICE FOR BATTERY
Document Type and Number:
Japanese Patent JP3932675
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To accurately estimate the maximum input/output power for a battery, and to widen the service range for the battery without causing unfavorable influence to the life of the battery.
SOLUTION: A charging or discharging current Ibin or Ibout where a battery voltage estimated based on a voltage variation margin by a open voltage Voc(k) found from an SOC of a battery and an internal resistance (r) and a dynamic variation margin of voltage based on variation of a charging/discharging current estimated by a state equation using a quantity of state x(k) reaches the maximum allowable voltage Vbmax or the minimum allowable voltage Vbmin after a prescribed time of the battery is calculated by a charge current calculating means 10 and a discharge current calculating means 12, and power estimating means 14, 16 computes the maximum input/output power Pbin, Pbout based on the product of the current Ibin or Ibout and the voltage Vbmax or the voltage Vbmin.
Inventors:
Shuu Watanabe
Yukio Kuroda
Yoshiaki Kikuchi
Yukio Kuroda
Yoshiaki Kikuchi
Application Number:
JP16845898A
Publication Date:
June 20, 2007
Filing Date:
June 16, 1998
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
G01R31/36; B60K6/20; B60K6/26; B60L3/00; B60W10/08; B60W20/00; H01M10/48; H02J7/10; G01R31/00; (IPC1-7): G01R31/36; B60L3/00; H01M10/48; H02J7/10
Domestic Patent References:
| JP9218251A | ||||
| JP10154533A | ||||
| JP5153703A | ||||
| JP10271695A | ||||
| JP11146505A | ||||
| JP10341502A |
Attorney, Agent or Firm:
Kenji Yoshida
Toshihiko Kanayama
Jun Ishida
Toshihiko Kanayama
Jun Ishida
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