Gas distribution plate, pressure drop test platform and test method for fuel cell stack

Abstract

The invention discloses a gas distribution plate, a pressure drop test platform and a test method for a fuel cell stack. The gas distribution plate (100) comprises a base (1), wherein the base is internally provided with a cathode inlet chamber (A), a cathode outlet chamber (B), an anode inlet chamber (C) and an anode outlet chamber (D) which are separated from one another, and the outer wall of the base is provided with a cathode gas inlet pressure tapping port (A1), a cathode gas outlet pressure tapping port (B1), an anode gas inlet pressure tapping port (C1) and / or an anode gas outlet pressure tapping port (D1) which are communicated with the corresponding cavities. The pressure drop test platform comprises the gas distribution plate (100) and a to-be-tested galvanic pile module (200) stacked on the gas distribution plate, wherein each pressure tapping port is connected with a pressure test tube. According to the invention, through the test platform, a pressure drop test and an air tightness test can be carried out; and the gas distribution plate is compact in product structure, high in integration level, convenient to assemble and complete in gas distribution function, and the pressure drop, the gas tightness and the like of the galvanic pile can be detected more accurately, reliably and quickly.

Description

technical field [0001] The invention belongs to the field of fuel cells. Background technique [0002] Fuel cell stacks (such as flat-plate solid oxide fuel cell (SOFC) stacks) are subject to stricter requirements on the pressure (pressure drop) of the gas at the inlet and outlet of the stack, subject to the level of cell sealing technology inside the stack. Excessive gas pressure difference at the outlet may cause damage to the internal sealant of the cell, resulting in "air leakage" in the cell stack; in addition, the pressure balance between the cathode and anode functional layers in the cell stack is also very important. If the pressure on one side is too high , it is very likely that the electrolyte layer between the cathode and the anode will rupture, causing a series of destructive consequences such as the anodic oxidation of the stack. [0003] Especially, for high-temperature fuel cell systems, such as planar SOFC fuel cell stacks, the tolerated inlet gas pressure ...

AI Technical Summary

Problems solved by technology

[0002] Fuel cell stacks (such as flat-plate solid oxide fuel cell (SOFC) stacks) are subject to stricter requirements on the pressure (pressure drop) of the gas at the inlet and outlet of the stack, subject to the level of cell sealing technology inside the stack. Excessive gas pressure difference at the outlet may cause damage to the internal sealant of the cell, resulting in "air leakage" of the cell stack; in addition, the pressure balance between the cathode and anode functional layers in the cell stack is also very important. If the pressure on one side is too high , it is very likely that the electrolyte layer between the cathode and the anode will rupture, causing a series of destructive consequences such as the anodic oxidation of the stack

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