MANAGEMENT OF OPERATION OF PEM-FUEL-CELL-STACK BACKUP ELECTRIC GENERATOR Russian patent published in 2016 - IPC H01M8/04 H01M8/10 

FIELD: electrical engineering.

SUBSTANCE: PEM-fuel-cell-stack backup electric generator (1) comprising: fuel-cell stack(2), formed by a plurality of stacked PEM fuel cells (3) electrically connected in series for supplying electrical energy to an electrical load; cell-voltage monitor (4) for measuring voltage supplied by each fuel cell(3); electrical energy management and conversion unit (5), connected between fuel-cell stack (2) and electrical load; blower (6) for supplying amount of air necessary for chemical reactions that occur in fuel cells(3); hydrogen recirculator (7) for recirculating hydrogen between outlet and inlet of fuel-cell stack (2); hydrogen-purging device (8) for carrying out a primary purging of hydrogen at a lower flow rate, and secondary purging of hydrogen at a higher flow rate; and controller (11), programmed for managing operation of electric generator (1) differently at start-up, at shut-down, and during normal operation thereof.

EFFECT: higher reliability and longer service life of backup electric generator.

6 cl, 2 dwg