Interconnect-type solid oxide fuel cell and fuel cell stack having the same

An interconnecting-type solid oxide fuel cell stack, comprising:

• a plurality of unit cells each having a first electrode layer, an electrolyte layer and a second electrode layer sequentially formed from an inside thereof, each unit cell further having an interconnector configured to be electrically connected to the first electrode layer and exposed to an outside thereof, the interconnector insulated from the second electrode layer;
• a first current collecting member formed on an outside of the interconnector and configured to collect current, wherein a radially extending first connecting portion is formed at each end of the first current collecting member;
• a first insulating member formed on an outside of the first current collecting member;
• a second current collecting member wound around an outer circumferential surface of the second electrode layer and an outside of the first insulating member;
• and
• a third current collecting member interposed between the outer circumferential surface of the second electrode layer and the second current collecting member and configured to collect current, wherein a radially extending second connecting portion is formed at each end of the third current collecting member,
• wherein the first and second connecting portions are bent to be parallel with the first and third current collecting members, respectively, and the first and second connecting portions are configured to be electrically connected to each other.

An interconnecting-type solid oxide fuel cell stack, comprising:

• a plurality of unit cells each having a first electrode layer, an electrolyte layer and a second electrode layer sequentially formed from an inside thereof, and each having an interconnector configured to be electrically connected to the first electrode layer and exposed to an outside thereof, the interconnector insulated from the second electrode layer;
• a first current collecting member formed on an outside of the interconnector and configured to collect current, wherein a radially extending first connecting portion is formed at both ends of the first current collecting member;
• a first insulating member formed on an outside of the first current collecting member;
• a second current collecting member wound around an outer circumferential surface of the second electrode layer and an outside of the first insulating member;
• and
• a third current collecting member interposed between the outer circumferential surface of the second electrode layer and the second current collecting member, the third current collecting member configured to collect current,
• wherein a radially extending second connecting portion is formed at both ends of the third current collecting member,
• wherein a third insulating member is formed between the second current collecting member formed on any one of the plurality of unit cells and the second current collecting member formed on another unit cell adjacent to the one unit cell, and
• wherein the first and second connecting portions are configured to be electrically connected to each other.