Patent ID: 8790836
Filing Date: 2014-07-29
Classification: H01M,Y02E,Y02T

Abstract:
1. A fuel cell system which comprises a fuel cell stack that generates electrical power by electrochemical reaction of fuel and oxidant, the fuel cell system comprising: a temperature measurement device that measures a temperature of said fuel cell stack during a shutdown process; a temperature storage device that stores said temperature; a controller that is programmed to estimate a residual water volume inside the fuel cell stack from a first control map that indicates a relationship between the temperature and the residual water volume, and to estimate an absorbable water volume that can be absorbed by a membrane electrode assembly of the fuel cell stack from a second control map that indicates a relationship between the residual water volume and the absorbable water volume; and a warm-up control device that is programmed to control a generated electric power for warm-up of the fuel cell stack when the fuel cell system is started from a third control map that indicates a relationship between the absorbable water volume and the generated electrical power for warm-up.