FUEL CELL SYSTEM

摘要

PURPOSE: A fuel cell system is provided to easily control the concentration of fuel supplied to a fuel cell stack, and to economically manufacture the fuel cell system by reducing the number of spare parts. CONSTITUTION: A fuel cell system(100) comprises the following: a fuel cell stack(30) generating an electrical energy by reacting fuel and an oxidant; a fuel supply unit(10) supplying the fuel to the fuel cell stack; and an oxidant supply unit(20) supplying the oxidant to the fuel cell stack. The fuel supply unit includes a fuel storage chamber(12) storing the fuel with a first concentration, a fuel recovery chamber(16), and a fuel-permeable membrane(15) located in between the fuel storage chamber and the fuel recovery chamber.