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 unit`s 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 N mod module of a fuel cell unit (1). A standard deviation (SUcell) of the voltages is calculated and compared with a preset threshold standard deviation (S threshold). 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 (S threshold), respectively. An independent claim is also included for a fuel cell system management system.