US Patent 12009563 Fuel cell system

A fuel cell system includes a fuel cell and a fuel system. The fuel cell includes a housing and a fuel cell stack positioned in the housing. The fuel cell stack is configured to produce an electrochemical reaction from a fuel and air to output electricity. The fuel system includes a fuel source, a fuel vaporizer, and fuel lines through which fuel flows from the fuel source to the fuel vaporizer and from the fuel vaporizer to the fuel cell stack. The fuel vaporizer includes a conductive tube through which the fuel flows, the conductive tube being in contact with the housing to conduct heat from the housing to the fuel to vaporize the fuel.