The proton exchange membrane fuel cell(PEMFC) is a clean and efficient power generation technology

which can directly convert the chemical energy of hydrogen into electricity by electrochemical reaction. The PEMFC has a wide application prospect in the fields of domestic co-generation

standby power supply and new energy automobile and so on. The fuel cell stack is the core component of the PEMFC system

and the system structure and integration process have a significant effect on the performance of fuel cell stack. This paper individually expatiates on the structure of the PEMFC system

gas subsystem

wetting subsystem

thermal management subsystem and control subsystem. The current-voltage experiment is carried out on the fuel cell stack when factors change such as the self-consumption

the starting temperature and the stable operation temperature. Then the performance change rules of the fuel cell stack are obtained. The experimental results show that

the system starting temperature and the stable operation temperature of the PEMFC system have a significant effect on its performance. When the system starting temperature is around 25 ℃ and the system stable operation temperature is 50~60 ℃

the fuel cell stack achieves the optimal performance. This conclusion can provide a basis for optimizing the performance of the PEMFC and improving the stability of the battery system.