Method for construction of PEM (proton exchange membrane) fuel cell performance prediction model

Abstract

The invention discloses a method for construction of a PEM (proton exchange membrane) fuel cell performance prediction model. A constructed model comprises a one-dimensional model vertical to a polar plate direction and a 1 plus 1 plus 1 quasi three-dimensional model; the construction of the one-dimensional model vertical to the polar plate direction concretely comprises four steps: determination of cell output voltage, determination of ohmic loss, determination of activation loss, and water management; on the basis that the 1 plus 1 plus 1 quasi three-dimensional model is vertical to the one-dimensional model in the polar plate direction, a direction along a cell flow channel and a ribbed plate direction vertical to the flow channel are added. The mass conservation equation of a reactant and water is solved to obtain average liquid water volume fractions in various layers of the cell and a reactant concentration in a catalyst layer; accordingly, the ohmic loss and the activation loss are determined; working conditions such as electric current density, temperature, the relative humidity of air inflow and the like are adjusted; and the output voltage of the PEM fuel cell in different working conditions can be predicted. The construction of the PEM fuel cell performance prediction model can effectively save the development expenses and shorten the development cycle.

Description

technical field [0001] The invention belongs to the field of electrochemical fuel cells, and in particular relates to a method for establishing a proton exchange membrane fuel cell performance prediction model. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has the advantages of high power density and zero emission, and is regarded as the most promising power source for automotive power, and its technical development has attracted the attention of researchers at home and abroad. In order to ensure the stable and reliable performance of PEMFC (including the high proton conductivity of the exchange membrane, the transport of reactants and the discharge of products, etc.), the water, hydrogen and oxygen transport processes in each layer of the PEMFC are studied, and then provide a good battery. Water management is crucial and provides guidance for the enhancement of PEMFC performance. [0003] Fuel cell simulation modeling, as an important means of fu...

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Problems solved by technology

The three-dimensional numerical model that can comprehensively study battery performance has problems such as high requirements for computing power and long computing cycles. It needs to be calculated by a workstation with high computing performance. It takes one day to calculate only a single working condition, which is not conducive to the application of the model in engineering practice. In the early stage of battery design, a model that can quickly predict the impact of battery design parameters on its performance is needed

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