On-Line EIS Measurement for High-Power Fuel Cell Systems Using Simulink Real-Time

Soo-Bin Han, Hwanyeong Oh, Won-Yong Lee, Jinyeon Won, Suyong Chae and Jongbok Baek
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Soo-Bin Han: Energy ICT Convergence Research Department, Korea Institute of Energy Research, 152 Gajeong-ro, Daejeon 34129, Korea
Hwanyeong Oh: Fuel Cell Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Daejeon 34129, Korea
Won-Yong Lee: Fuel Cell Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Daejeon 34129, Korea
Jinyeon Won: Fuel Cell Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Daejeon 34129, Korea
Suyong Chae: Energy ICT Convergence Research Department, Korea Institute of Energy Research, 152 Gajeong-ro, Daejeon 34129, Korea
Jongbok Baek: Energy ICT Convergence Research Department, Korea Institute of Energy Research, 152 Gajeong-ro, Daejeon 34129, Korea

Energies, 2021, vol. 14, issue 19, 1-14

Abstract: Impedance measurements by EIS are used to build a physical circuit-based model that enables various fault diagnostics and lifetime predictions. These research areas are becoming increasingly crucial for the safety and preventive maintenance of fuel cell power systems. It is challenging to apply the impedance measurement up to commercial applications at the field level. Although EIS technology has been widely used to measure and analyze the characteristics of fuel cells, EIS is applicable mainly at the single-cell level. In the case of stacks constituting a power generation system in the field, it is difficult to apply EIS due to various limitations in the high-power condition with uncontrollable loads. In this paper, we present a technology that can measure EIS on-line by injecting the perturbation current to fuel cell systems operating in the field. The proposed EIS method is developed based on Simulink Real-Time so that it can be applied to embedded devices. Modeling and simulation of the proposed method are presented, and the procedures from the simulation in virtual space to the real-time application to physical systems are described in detail. Finally, actual usefulness is shown through experiments using two physical systems, an impedance hardware simulator and a fuel cell stack with practical considerations.

Keywords: fuel cell systems; high power application; on-line EIS; impedance measurement; real-time target; Simulink Real-Time; Nyquist plot; Speedgoat (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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