PRESSURE-REGULATING DEVICE FOR A SYSTEM OF FUEL-CELL STACKS

摘要

The fuel cell system (10) includes fuel cells (12), a circuit (14) for supplying each fuel cell (12) with an oxidizing fluid, a circuit (16) for supplying each battery with fuel (12) reducing fluid, and a pressure regulating device (18) equipping the supply circuits (14, 16) for regulating the fluid pressure in each fuel cell (12). The pressure regulating device (18) comprises a first fluid pressure control line (50) and a second fluid passage line (52) arranged in parallel between an upstream supply line (44). fluid of a supply circuit (14) and downstream conduits (42) for connection to each fuel cell (12). The first line (50) comprises a first pressure regulator (56) for regulating the pressure in a downstream portion (64) of the first line (50) as a function of a pressure measured downstream of a second pressure regulator ( 58) placed on the second line (52), and the second pressure regulator (58) is adapted to balance the pressure in the downstream portion (68) of the second line (52) with a reference pressure, sensed on the portion downstream (64) from the first line (50).