(19)
(11) EP 3 021 400 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
24.08.2016 Bulletin 2016/34

(43) Date of publication:
18.05.2016 Bulletin 2016/20

(21) Application number: 15193906.3

(22) Date of filing: 10.11.2015
(51) International Patent Classification (IPC): 
H01M 8/04(2006.01)
 H01M 8/10(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA MD

(30) Priority: 15.11.2014 JP 2014232250

(71) Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Toyota-shi, Aichi-ken, 471-8571 (JP)

(72) Inventors:
  • YAMANAKA, Tomio
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • NADA, Mitsuhiro
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • SUZUKI, Hiroyuki
    Toyota-shi, Aichi-ken, 471-8571 (JP)

(74) Representative: Kuhnen & Wacker 
Patent- und Rechtsanwaltsbüro Prinz-Ludwig-Straße 40A
85354 Freising
85354 Freising (DE)

   


(54) POWER SUPPLY SYSTEM AND VOLTAGE CONTROL METHOD FOR FUEL CELL


(57) A voltage control method for a fuel cell (100) includes: interrupting electrical connection between the fuel cell and a load (170, 172) in a low load state; supplying oxygen to the fuel cell in accordance with a preset condition during the electrical connection is interrupted; detecting an OCV (open circuit voltage) of the fuel cell after oxygen is supplied to the fuel cell in accordance with the preset condition; reducing an amount of oxygen supplied to the fuel cell when the OCV is higher than a target voltage by a first value or larger; increasing the amount of oxygen when the OCV is lower than the target voltage by a second value or larger; and keeping the amount of oxygen when the OCV is lower than a sum of the target voltage and the first value and higher than a value obtained by subtracting the second value from the target voltage.