FUEL BATTERY STACK

To provide a fuel battery system having a small volume per output and a high power generation efficiency.SOLUTION: In a preferable one aspect of the present invention, the present invention provides a fuel battery stack that a solid electrolyte layer and a plurality of fuel battery cells having a first electrode layer and a second electrode layer which are formed while nipping the solid electrolyte layer are laminated so that both of the first electrode layers or both of the second electrode layers is opposite in adjacent cell. A common flow channel that supplies a first gas to both of the first electrode layers which are opposite to a region where both of the first electrode layers are opposite is formed, and a common flow channel that supplies a second gas to both of the second electrode layers which are opposite to the region where both of the second electrode layers are opposite is formed. A connection electrode is formed to an end part of the fuel battery cell, and at least one part of each fuel battery cell which is laminated is serially connected via the connection electrode.SELECTED DRAWING: Figure 4 【課題】出力当りの体積が小さく、発電効率が高い、燃料電池システムを提供することを目的とする。【解決手段】本発明の好ましい一側面は、固体電解質層と、該固体電解質層を挟んで形成された第１電極層と第２電極層を備える複数の燃料電池セルが前記第１電極層どうし、または前記第２電極層どうしを隣接セルどうしで対向させて積層された燃料電池スタックで、前記第１電極層どうしが対向した領域に前記対向した第１電極層の両方に第１のガスを供給する共通流路が形成され、前記第２電極層どうしが対向した領域に前記対向した第２電極層の両方に第２のガスを供給する共通流路が形成され、前記燃料電池セルの端部に接続電極が形成され、複数の前記積層された燃料電池セルの少なくとも一部が前記接続電極を介して直列接続されることを特徴とする燃料電池スタックである。【選択図】 図４