Abstract: A hydrogen supply unit is configured to inject hydrogen gas having flowed in an inflow passage into an outflow passage by use of an injector to reduce the pressure of the hydrogen gas. The hydrogen supply unit includes a primary-side relief valve for releasing the hydrogen gas from inside to outside of the inflow passage when the internal pressure of the inflow passage rises to a first predetermined value, and a secondary-side relief valve for releasing the hydrogen gas from inside to outside of the outflow passage when the internal pressure of the outflow passage rises to a second predetermined value. The primary-side relief valve and the secondary-side relief valve are held between the inflow block and the outflow block.

Abstract: A hydrogen supply unit is provided with an inflow block having an inflow passage for hydrogen gas, an outflow block having an outflow passage for hydrogen gas, injectors for adjusting a flow rate and a pressure of hydrogen gas, a secondary pressure sensor for detecting hydrogen gas pressure in the inflow passage, and a tertiary pressure sensor for detecting hydrogen gas pressure in the outflow passage. An inlet side of each injector is connected to the inflow passage and an outlet side of each injector is connected to the outflow passage. The hydrogen gas allowed to flow in the inflow passage is injected by each injector into the outflow passage and thereby reduced in pressure. Each of the injectors, secondary pressure sensor, and tertiary pressure sensor are held between the inflow block and outflow block.