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Description

The fuel cell model in Figure 1 consists of a voltage source connected to a series resistance and a diode to avoid negative current flowing to the cell. The model assumes the operation of the fuel cell at nominal temperature and pressure.

Figure 1 Fuel Cell equivalent circuit diagram

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The fuel cell model described in Figure 1 represents the following transfer function

Where:

The mentioned parameters are described in Mask and Parameters section below.

Table of Contents

Mask and Parameters

Fuel Cell Parameters

Stack Voltage vs Current

Figure 2  Fuel Cell stack voltage vs current diagram

Ports, Inputs, Outputs and Signals Available for Monitoring

Ports

Inputs

None

Outputs

None

Sensors

Extraction of Data Examples

The parameters for the Fuel Cell can be directly obtained from the datasheet on the stack voltage vs current curve shown as shown in the example in Figure 2. Some examples of this process are shown below. It is recommended to use a software that allows a precise extraction of data on the figures.

PowerCell S2-50C Fuel Cell

Figure 3 below is the example of a commercial datasheet. The purpose of this section is to show how to extract the meaningful data from the Tafel slope. 

 Figure 3  Stack voltage vs current S2-50C.

NedStack PS6

 Figure 4  Stack voltage vs current PS6.

Figure 4 below presents another example to extract the necessary information from the Tafel slope.

References