Patent ID: 9543600
Date: 2017-01-10
CPC Classifications: H01M,Y02E

Claim:
1. A fuel cell system comprising: a fuel cell which generates electricity by fuel gas being supplied to a fuel gas fluidic channel and oxidant gas being supplied to an oxidant gas fluidic channel; a first fuel gas supply fluidic channel through which fuel gas directed to the fuel gas fluidic channel flows; a fuel off gas discharge fluidic channel through which fuel off gas discharged from the fuel gas fluidic channel flows; a return fluidic channel through which fuel off gas returning from the fuel off gas discharge fluidic channel to the first fuel gas supply fluidic channel flows; a first fuel gas injection device which is provided in the first fuel gas supply fluidic channel and injects fuel gas by opening and closing a valve; an ejector which is provided in the first fuel gas supply fluidic channel downstream of the first fuel gas injection device and mixes fuel off gas returning from the fuel off gas discharge fluidic channel to the first fuel gas supply fluidic channel via the return fluidic channel with fuel gas to be injected by the first fuel gas injection device; a second fuel gas supply fluidic channel through which fuel gas directed to the fuel gas fluidic channel flows and a downstream end of the second fuel gas supply fluidic channel is connected to the first fuel gas supply fluidic channel downstream of the ejector; a second fuel gas injection device which is provided in the second fuel gas supply fluidic channel and injects fuel gas by opening and closing a valve; and a control means that is configured to control the first fuel gas injection device and the second fuel gas injection device, wherein the control means is configured to adjust a flow rate of the fuel gas injected from the first fuel gas injection device by adjusting a valve opening time period and a valve closing time period of the first fuel gas injection device, which are repeated alternately, and the control means is configured to make at least a part of the valve opening time period of the second fuel gas injection device overlap with the valve closing time period of the first fuel gas injection device when opening the valve of the second fuel gas injection device.