| 摘要 |
PROBLEM TO BE SOLVED: To accurately grasp a remaining amount of hydrogen in a storage tank over the whole region of 0 to 100%. SOLUTION: A hydrogen storage device is provided with the storage tank 3 for hydrogen supplied from a hydrogen cylinder 2, a flow rate control part for controlling a flow rate of hydrogen taken out of the storage tank 3, a tank 4 for detecting a remaining amount filled with a hydrogen storage material MH1 having larger pressure changes for a hydrogen storage amount by a hydrogen pressure-composition isothermal line than that of hydrogen storage alloy MH filled in the storage tank 3, and a flow rate control part for controlling a flow rate of hydrogen taken out of the tank 4 for detecting a remaining amount. Pressure sensors 19, 20 are provided in the storage tank 3 and the tank 4 for detecting remaining amount, respectively. The device is provided with a computation circuit 23 for calculating a remaining amount of hydrogen in the storage tank 3 based on each pressure of both tanks 3, 4 detected by the pressure sensors 19, 20 at an adjusting stage of flow rates by both flow rate control parts to take out hydrogen at a rate substantially equal to rates of each hydrogen storage amount in the storage tank 3 and the tank 4 for detecting a remaining amount.
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