Influence of load on the transient response of the proton exchange membrane fuel cell

The influences of purely resistive loads,pure inductive loads and loading modes on the transient response characteristics of proton exchange membrane fuel cell were compared with transient measurement method.The results showed that PEMFC load transient response was closely related with the load characteristics and the control modes.With the same step current,the response time of PEMFC loading with pure resistance load was shorter than that of PEMFC loading pure inductive load,and the undershoot of the former was smaller than the latter.too.And the self-inductance of the inductive load would bring a longer response time and more undershoot to the cell.When PEMFC loading pure resistance load was used,the low-voltage load was a bit larger in the constant current mode,but in fixed-voltage mode,there was no low-voltage load.These two loading modes had close response time.In short,in the case of pure resistive load and the fixed voltage mode loading,PEMFC transient response characteristics was the best.