Patent ID: 8883363

Claim:
A fuel gas supply device for supplying fuel gas to a fuel cell stack which generates power using the fuel gas and oxidant gas, comprising: a fuel tank configured to store the fuel gas; a fuel gas path connecting the fuel tank and the fuel cell stack; a control valve provided in the fuel gas path and configured to control a supply amount of the fuel gas; an upstream-side pressure sensor for detecting an upstream-side pressure of the fuel gas at an upstream side of the control valve; a downstream-side pressure sensor for detecting a downstream-side pressure of the fuel gas at a downstream side of the control valve; and a programmable controller programmed to: calculate a required opening, an opening time and a closing time of the control valve based on a target fuel gas pressure in the fuel cell stack, the detected downstream-side pressure and the detected upstream-side pressure; and control the control valve using the calculated required opening, opening time and closing time.