Fuel cell system management method for e.g. automobile field, involves finding presence and absence of excess water in fuel cell unit when standard deviation of units cells voltages is greater than/equal to and lower than threshold value

摘要

The method involves measuring voltages across terminals of each cell of each Nmod module (2,3) of a fuel cell unit (1). A standard deviation (SUcell) of the voltages is calculated and compared with a preset threshold standard deviation (Sthreshold). The presence and absence of excess water in the unit are determined when the deviation (SUcell) is greater than/equal to and lower than the deviation (Sthreshold), respectively. An independent claim is also included for a fuel cell system management system.