Patent ID: 8393364

Claim:
A refuelling container for fuelcell to inject fuel for refuelling from an outside to a fuel receiving part of a fuelcell body, wherein the container is designed to reduce a volume of the container while keeping airtight communication with an inside of said fuel receiving part to inject the fuel in a predetermined amount into said fuel receiving part, and then restore an original volume of the container to absorb atmospheric gas in said fuel receiving part, and wherein in case it is defined that a volume of said fuel receiving part, which is a subject of the fuel to be injected and is supplied is V T ; and allowable pressure in said fuel receiving part is Ptf, when one of a volume V CL of the fuel in said refueling container just before a fuel injecting operation and a reduction volume Vs in the refueling container when the fuel is injected is determined together with a volume Vc of the refueling container where a volume of the fuel in said fuel receiving part, which is supposed to be injected when a fuel injecting operation is made, is V TL , it is designed that said volume V CL or said reduction volume Vs does not exceed a predetermined volume and a relationship given by the following equation (1) ( V c −V CL +V T −V TL )/( V c −V CL +V T −V TL −Vs )≦ Ptf/P (1) is established and wherein an environmental pressure is P.