A hybrid power module suitable for use in an array of hybrid power modules comprises a fuel cell stack, an energy storage device, charger circuit operable to charge the energy storage device from the fuel cell stack and/or an external power source at approximately a defined voltage; a stack disconnect...http://www.google.com.tw/patents/US7521138?utm_source=gb-gplus-share專利 US7521138 - Apparatus and method for hybrid power module systems
