Patent ID: 8534327

Claim:
A gas charging apparatus which is connected to a plurality of gas storage containers mounted on a fuel-supplied unit, to charge a fuel gas into the gas storage containers, respectively, the apparatus comprising: a gas supply source which supplies a compressed fuel gas; a fuel gas charging line which is connected to the gas supply source, to charge the fuel gas into the gas storage containers, respectively; and a controller, the controller including: a temperature information acquiring section which acquires temperature information in the gas storage containers; a pressure information acquiring section which acquires pressure information in the gas storage containers; a relation data acquiring section which acquires correspondence relation data indicating a correspondence relation between a temperature and a pressure in the gas storage container, in a case where a beforehand acquired fill percentage of the gas storage container becomes a target fill percentage; a temperature difference calculating section which calculates, in accordance with the temperature information, a temperature difference between the gas storage container having the highest internal temperature and the gas storage container having the lowest internal temperature among the plurality of gas storage containers; and a control section which performs control so as to stop the charging of the fuel gas, when the temperature in the gas storage container having the lowest internal temperature becomes a balance temperature obtained by subtracting the temperature difference from a preset temperature upper limit value, and the pressure obtained from the pressure information becomes a corresponding pressure corresponding to the balance temperature in the correspondence relation data.