FUEL CELL

摘要

In a fuel cell provided herein, the flow resistance of oxidant gas and that of oxidant off-gas in a cell stack are low to effectively reduce risk of gas leakage and risk of resultant destructive damage. The fuel cell comprises a cell stack 10 configured by stacking an anode plate 12 and a cathode plate 13 alternately. A fuel-containing gas intake manifold 10F is formed integrally on one of two sides of the cell stack 10 facing each other. A fuel off-gas exhaust manifold 10G is formed integrally on the other of these two sides. An oxidant gas intake manifold 10H is formed integrally on one of different two sides facing each other. A manifold is not formed on the other of the different two sides to form an exhaust port 15b on a lateral side of the cell stack 10 through which oxidant off-gas.

主权项

1. A fuel cell comprising a cell stack configured by stacking a flat plate-like anode plate and a flat plate-like cathode plate alternately while holding a cell between central sections of the anode plate and the cathode plate, and holding a flat plate-like cell holder between peripheral sections of the anode plate and the cathode plate, the cell having a rectangular flat plate-like shape with one main surface to which an anode is connected and an opposite main surface to which a cathode is connected, wherein
a fuel-containing gas channel and an oxidant gas channel are formed on an anode side and a cathode side respectively of each cell, the fuel-containing gas channel being formed for passing fuel-containing gas along the anode of each cell in the cell stack, the oxidant gas channel being formed for passing oxidant gas along the cathode of each cell in the cell stack, a manifold is formed at each of an upstream side of the fuel-containing gas channel, a downstream side of the fuel-containing gas channel, and an upstream side of the oxidant gas channel to form a manifold-integrated structure, the manifold on the upstream side of the fuel-containing gas channel is a fuel-containing gas intake manifold that penetrates a plate-stacked section in a stacking direction where the anode plate and the cathode plate are stacked while an insulating plate is caught between the anode plate and the cathode plate and communicates with an upstream end of each fuel-containing gas channel in the cell stack, the manifold on the downstream side of the fuel-containing gas channel is a fuel off-gas exhaust manifold that penetrates the plate-stacked section in the stacking direction and communicates with a downstream end of each fuel-containing gas channel in the cell stack, the manifold on the upstream side of the oxidant gas channel is an oxidant gas intake manifold that penetrates the plate-stacked section in the stacking direction and communicates with an upstream end of each oxidant gas channel in the cell stack, and a downstream side of the oxidant gas channel in each cell has an open structure in which a downstream end of each oxidant gas channel in the cell stack is opened as an oxidant off-gas exhaust port at an outer peripheral surface of the cell stack and oxidant off-gas is released directly to the outside of the cell stack through the downstream end of the oxidant gas channel.