Fuel cell self-humidifying structure, control method and fuel cell system

The invention discloses a fuel cell self-humidifying structure, which comprises a water-gas separator connected with a gas inlet and a gas outlet of a fuel cell stack, and a gas inlet valve and a gas outlet valve connected with the gas-water separator, and the gas-water separator is arranged to be used for humidifying gas flowing to the fuel cell stack and collecting water discharged from the fuel cell stack. According to the fuel cell self-humidifying structure, the service life of a fuel cell system can be prolonged, and the cost is controllable. The invention further discloses a control method of the fuel cell self-humidifying structure and a fuel cell system. 本发明公开了一种燃料电池自增湿结构，包括与燃料电池堆的进气口和出气口连接的水气分离器以及与气水分离器连接的进气阀和排气阀，气水分离器设置成用于对流向燃料电池堆的气体进行增湿和用于收集燃料电池堆排出的水。本发明的燃料电池自增湿结构，可以提升燃料电池系统的使用寿命，而且成本可控。本发明还公开了一种燃料电池自增湿结构的控制方法和燃料电池系统。