Stack and fuel cell system using the same

A fuel cell system comprising:

• a stack to generate electric energy due to electrochemical reaction between hydrogen and oxygen, the stack comprising:
• a first collecting plate having a first electric polarity;
• a second collecting plate having a second electric polarity different from the first electric polarity;
• at least one electricity generator located between the first collecting plate and the second collecting plate, the at least one electricity generator for generating electric energy due to electrochemical reaction between hydrogen and oxygen to be collected by the first collecting plate and the second collecting plate;
• coupling members pressing the at least one electricity generator in an airtight connection between the first collecting plate and the second collecting plate;
• a terminal member electrically connected to the first collecting plate and insulated from the second collecting plate, the terminal member protruding from the second collecting plate and used as a first terminal having the first electric polarity;
• and
• a second terminal located on a same side of the stack as the first terminal and having the second electric polarity,
• wherein the terminal member comprises one of the coupling members;
• a fuel feeder to supply fuel containing hydrogen to the stack;
• fuel supplying and discharging pipes adapted to supply the fuel to the at least one electricity generator through the fuel feeder, and to discharge the fuel incompletely reacted in the stack;
• an oxygen feeder adapted to supply an oxidizing agent containing oxygen to the stack;
• and
• oxidizing agent supplying and discharging pipes adapted to supply and discharge an oxidizing agent to the at least one electricity generator through the oxygen feeder,
• wherein the fuel supplying and discharging pipes and the oxidizing agent supplying and discharging pipes are provided on the first collecting plate.

A stack for a fuel cell, comprising:

• a first collecting plate having a first electric polarity;
• a second collecting plate having a second electric polarity different from the first electric polarity;
• at least one electricity generator located between the first collecting plate and the second collecting plate, the at least one electricity generator for generating electric energy due to electrochemical reaction between hydrogen and oxygen to be collected by the first collecting plate and the second collecting plate;
• coupling members pressing the at least one electricity generator in an airtight connection between the first collecting plate and the second collecting plate;
• a terminal member protruding from the second collecting plate, the terminal member electrically connected to the first collecting plate and insulated from the second collecting plate, such that the terminal member is used as a first terminal having the first polarity;
• and
• a second terminal located on a same side of the stack as the first terminal and having the second electric polarity,
• wherein the terminal member penetrates the at least one electricity generator and is coated with an insulating film in a portion thereof penetrating the at least one electricity generator.