Fuel cell system and control method therefor

摘要

A fuel cell system comprises a compressor configured to supply the cathode gas to the fuel cell, an intercooler provided downstream of the compressor and configured to cool the cathode gas discharged from the compressor, a pressure regulating valve configured to adjust a pressure downstream of the intercooler, and a controller. The controller computes a first target pressure of the intercooler downstream pressure according to a target output of the fuel cell and computes a second target pressure of the intercooler downstream pressure according to the intercooler downstream temperature. Then, the controller sets smaller one of the first and second target pressures as a target pressure of the intercooler downstream pressure and controls the compressor and the pressure regulating valve according to the target pressure.

主权项

1. A fuel cell system for generating power by supplying anode gas and cathode gas to a fuel cell, comprising:
a compressor configured to supply the cathode gas to the fuel cell; an intercooler provided downstream of the compressor and configured to cool the cathode gas discharged from the compressor; a pressure regulating valve configured to adjust a pressure downstream of the intercooler; an intercooler downstream temperature detection unit configured to detect a temperature downstream of the intercooler; a first target pressure computation unit configured to compute a first target pressure of the intercooler downstream pressure according to a target output of the fuel cell; a second target pressure computation unit configured to compute a second target pressure of the intercooler downstream pressure according to the intercooler downstream temperature; a target pressure setting unit configured to set smaller one of the first and second target pressures as a target pressure of the intercooler downstream pressure; and a pressure control unit configured to control the intercooler downstream pressure to the target pressure by controlling the compressor and the pressure regulating valve according to the target pressure.