{
  "$type": "site.standard.document",
  "description": "The method of operating a passive hybrid power supply in, or near, zero connected load conditions comprises the steps of : - supplying a stream of substantially pure hydrogen to the anode of said fuel cell; - supplying an stream of substantially pure oxygen to the cathode of said fuel cell; -…",
  "path": "/patents/1013032",
  "publishedAt": "2011-05-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M16/006",
    "BELENOS CLEAN POWER HOLDING AG [CH]"
  ],
  "textContent": "The method of operating a passive hybrid power supply in, or near, zero connected load conditions comprises the steps of : - supplying a stream of substantially pure hydrogen to the anode of said fuel cell; - supplying an stream of substantially pure oxygen to the cathode of said fuel cell; - monitoring an electric current supplied by the storage battery; - monitoring an output voltage shared by the fuel cell and the battery; - evaluating a state of charge (SOC) of the battery based on said electric current and said output voltage; - monitoring a hydrogen pressure in the fuel cell; - monitoring an oxygen pressure in the fuel cell; - limiting the stream of hydrogen and the stream of oxygen and actuating the hydrogen and oxygen recirculating pumps in such a way as to bring and maintain the hydrogen and oxygen pressures below .7 bar absolute while maintaining said hydrogen pressure between 70 and 130 % of said oxygen pressure, in such a way as to ensure that the output voltage is maintained at a level corresponding to less than .90 volts/cell and does not exceed the maximum voltage limit of the battery.",
  "title": "Method of operating a fuel cell/battery passive hybrid power supply"
}