Accelerated test method for durability of metal bipolar plate of proton exchange membrane fuel cell

Abstract

The invention provides an accelerated durability test method for a metal bipolar plate of a proton exchange membrane fuel cell. The method comprises the following steps: S1, constructing an accelerated durability test system for the metal bipolar plate; s2, selecting a working condition of a durability acceleration test of the metal bipolar plate according to a corresponding actual working condition when the proton exchange membrane fuel cell is used; s3, taking preset fixed durability test time as a termination index of the durability test of the metal bipolar plate; s4, detecting the performance assessment item of the metal bipolar plate to be tested at a fixed time interval until the termination index of the test is reached; and S5, drawing a relation curve between the test time and the performance change of the bipolar plate according to the obtained performance assessment result of the metal bipolar plate to be tested, and carrying out qualitative analysis and evaluation on the durability of the metal bipolar plate. The durability test is carried out by using the dynamic potential working condition, and an important theoretical basis is provided for the design development and material selection of the metal bipolar plate.

Description

technical field [0001] The invention relates to a proton exchange membrane fuel cell, in particular to an accelerated test method for the durability of a metal bipolar plate of a proton exchange membrane fuel cell. Background technique [0002] In recent years, with the continuous development of industry, problems such as energy depletion and environmental pollution have become increasingly prominent. Hydrogen energy and fuel cell technology are recognized as one of the effective solutions. Among them, proton exchange membrane fuel cells (PEMFCs) have the advantages of low operating temperature, zero emission, high specific power and high energy conversion rate, and have broad prospects in the fields of vehicle power supplies, portable devices and aviation. [0003] PEMFCs are mainly composed of bipolar plates, membrane electrode assemblies, end plates, and seals. As the core multifunctional component of PEMFCs, the bipolar plate plays the roles of evenly distributing gas, ...

AI Technical Summary

Problems solved by technology

[0008] The design of this condition obviously deviates from the actual operating conditions of the battery, and it cannot truly reflect the potential environment of the metal bipolar plate during the actual operation of the battery.

The actual operating potential of the battery is maintained at 0.6 to 0.85V most of the time, and rarely reaches a high potential of 1.5V, and the actual operating potential of the stack is a dynamic process that is constantly changing. Based on the constant potential working condition assumed by this patent, The test results cannot accurately reflect the actual service life of the bipolar plate, nor can it truly reflect the change process of the metal bipolar plate during the in-situ test

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