Liquid fuel cell

A liquid fuel cell including a plurality of series-connected unit cells each including a fuel electrode and an oxidizer electrode disposed opposite to each other with an electrolyte layer being interposed therebetween, a fuel chamber disposed adjacent to said fuel electrode, and an oxidizer chamber disposed adjacent to said oxidizer electrode, and a fuel tank supplying liquid fuel to said fuel chambers, said fuel cell comprising a passage connecting between a non-charged space in said fuel tank and said fuel chambers of said unit cells, and gas venting means including a gas vent port provided with gas-liquid separating means and disposed on at least one of said passage and said non-charged space of said fuel tank, said gas venting means including at least two gas vent ports so that gas can be vented from one of said gas vent ports when the attitude of the fuel cell tilts over an angle of more than 45.degree. from the normal attitude.

A liquid fuel cell including a plurality of series-connected unit cells each including a fuel electrode and an oxidizer electrode disposed opposite to each other with an electrolyte layer being interposed therebetween, a fuel chamber disposed adjacent to said fuel electrode, and an oxidizer chamber disposed adjacent to said oxidizer electrode, and fuel tanks supplying liquid fuel to said fuel chambers, wherein said fuel tanks are disposed on both ends respectively of the laminate of said series-connected unit cells, and wherein said fuel cell comprises a passage connecting between at least one of non-charged spaces of said fuel tanks and said fuel chambers, and gas venting means including gas vent ports provided with gas-liquid separating means and disposed on at least one of said passage and said non-charged space of said fuel tank communicating with said passage, said gas venting means including at least two gas vent ports disposed at different positions respectively so that gas can be vented from one of said gas vent ports when the attitude of the fuel cell tilts over an angle of more than 45.degree. from the normal attitude.

A liquid fuel cell including a fuel electrode and an oxidizer electrode disposed opposite to each other with a liquid-fuel impermeable electrolyte layer being interposed therebetween, a fuel chamber disposed adjacent to said fuel electrode, an oxidizer chamber disposed adjacent to said oxidizer electrode, and a fuel tank supplying liquid fuel to said fuel chamber, wherein at least two passages are provided so that fuel can be supplied from said fuel tank to said fuel chamber through a second passage when the attitude of the fuel cell tilts over an angle of more than 45.degree. from the normal attitude and fuel cannot be supplied through a first passage normally connecting between said fuel tank and said fuel chamber, said first and second passages cooperating to continuously charge fuel in said fuel chamber to ensure quick starting in response to the supply of an oxidizing agent to said oxidizer chamber, and means is provided for venting gas produced at said fuel electrode to the atmosphere.