Fuel cell unit and method of assembling thereof

A fuel cell unit comprising:

• a fuel cell stack in which a plurality of fuel cells are stacked;
• an electrical device;
• and
• a bus bar electrically connecting between a terminal of the fuel cell stack and a terminal of the electrical device, wherein
• the bus bar includes a non-joined portion in which a plurality of metal plates are stacked without being joined to each other, and
• the plurality of metal plates include a first metal plate and a second metal plate thicker than the first metal plate, and wherein
• a number of the first metal plate is two or more, and
• the second metal plate is sandwiched between the two or more first metal plates.

A method of assembling a fuel cell unit that includes a fuel cell stack in which a plurality of fuel cells are stacked and an electrical device, the method comprising:

• forming a bus bar in which a plurality of metal plates including a first metal plate and a second metal plate thicker than the first metal plate are stacked, wherein the second metal plate is smaller in number than the first metal plate;
• electrically connecting a first connection portion of the bus bar to a terminal of the fuel cell stack;
• and
• electrically connecting a second connection portion of the bus bar to a terminal of the electrical device, wherein
• the forming the bus bar includes joining the plurality of metal plates to each other in each of the first connection portion and the second connection portion without joining the plurality of metal plates to each other in a non-joined portion between the first connection portion and the second connection portion.