Fuel cell system and fuel cell system for vehicle

A fuel cell system in which a plurality of unit fuel cell groups are connected, each of the unit fuel cell groups comprising a hydrogen tank, a fuel cell, and a fuel cell controller configured to control power generation of the fuel cell, the fuel cell system comprising:

• a tank controller configured to control filling and discharge of hydrogen in the hydrogen tank of each of at least two of the unit fuel cell groups,
• wherein each of the unit fuel cell groups comprises a tank-side hydrogen line having one end connected to the hydrogen tank, and a hydrogen filling line and a hydrogen supply line that are branched off from other end of the tank-side hydrogen line, the hydrogen filling line and the hydrogen supply line extending toward a hydrogen filling port and the fuel cell, respectively,
• the hydrogen supply line brings hydrogen to the fuel cell,
• the hydrogen supply lines of the at least two unit fuel cell groups are linked with each other,
• a check valve configured to prevent a reverse flow of hydrogen from the tank-side hydrogen line is provided in the hydrogen filling line,
• the hydrogen filling lines of the at least two unit fuel cell groups are linked with each other at upstream of the check valve,
• each of the unit fuel cell groups comprises a pressure reducing valve, and
• the tank controller stops supply of hydrogen into the fuel cell of a unit fuel cell group in which an abnormality has been detected.