Fuel cell system for automobile propulsion drive has defective fuel cell unit decoupled with blocking of medium flows through decoupled fuel cell unit

摘要

The fuel cell system has a number of fuel cell units (10,11,12,13), at least one of which is uncoupled via a decoupling device (14,15,16,17) upon occurrence of a fault, with at least one blocking element in the form of a valve flap with a manual actuator used for interrupting each medium flow through the decoupled fuel cell unit and an electrical switch element (18,19,20,21) bridging the decoupled fuel cell unit. The electrical switch element can be provided by a relay or a semiconductor element, the decoupled fuel cell provided with at least one venting element (22,23,24,25).