Fuel cell system

The utility model relates to a fuel cell system which comprises a fuel supply device, an ejector and an electric pile, the fuel supply device is used for supplying fuel to the electric pile, an outlet of the fuel supply device is communicated with an inlet of the ejector, and an outlet of the ejector is communicated with an inlet of the electric pile. Wherein the fuel cell system further comprises a pump and a four-way valve, the four-way valve comprises a first interface, a second interface, a third interface and a fourth interface, an outlet of the electric pile is communicated with the first interface, an inlet of the pump is communicated with the second interface, an outlet of the pump is communicated with the third interface, and an inlet of the ejector is communicated with the fourth interface. 本申请涉及一种燃料电池系统，包括燃料供应装置、引射器和电堆，燃料供应装置用于向电堆供应燃料，燃料供应装置的出口连通于引射器的入口，引射器的出口连通于电堆的入口。其中，燃料电池系统还包括泵和四通阀，四通阀包括第一接口、第二接口、第三接口以及第四接口，电堆的出口连通于第一接口，泵的入口连通于第二接口，泵的出口连通于第三接口，引射器的入口连通于第四接口。