当前，燃料电池氢气循环泵（简称“氢泵”）的主要工作性能（流量压升、功耗）测试所用的气体介质多数为氮气或空气，与实际工作时的气体成分及状态差异较大，导致测试结果的偏差也较大。为了进一步探究氢泵的实际工作性能，通过模拟真实气体组分和状态，试验研究了其工作性能及主要影响因素。结果表明：同压升下，氮气和体积比为9∶1的氢氮混合气的流量差值大于10%；入口气体压差为50 kPa时，流量和功耗的差值大于10%；低转速、低压升时，气体温度为25 ℃和60 ℃时的流量差值大于10%；高转速、高压升时，气体相对湿度为80%和未加湿时的流量差值大于10%；供电电压为650 V和450 V时，功耗的差值大于10%。

Currently, the gas medium used in the main working performance (flow-pressure rise, power consumption) test of fuel cell hydrogen circulation pump (hydrogen pump) is mostly nitrogen or air, which is quite different from the actual work in gas component and state, causing a large deviation in test results. In order to further explore the main operating performance of hydrogen pump in real condition, the main operating performance and main influencing factors were studied by simulating the real gas components and states. The results show that the difference between the flow rates of nitrogen and the hydrogen-nitrogen mixture with a volume ratio of 9∶1 is more than 10% under the same pressure rise. When the pressure difference of inlet gas is 50 kPa, the differences between flows and power consumptions are greater than 10%. At low speed and low pressure rise, the flow difference is greater than 10% when the gas temperature is 25 ℃ and 60 ℃.At high speed and high pressure rise, the flow difference is greater than 10% when the gas relative humidity is 80% and when no humidification is applied. When the supply voltages are 650 V and 450 V, the difference of power consumption is greater than 10%.