Evaluation of Generation Current inside Membrane Electrode Assembly in Polymer Electrolyte Fuel Cell Using Static Magnetic Field around Fuel Cell

Abstract

Polymer electrolyte fuel cell (PEFC) is one of desired clean energy converters. In order to raise the power generation efficiency of PEFC, it is necessary to monitor the generation of current inside MEA (membrane electrode assembly) in PEFC. In this paper, a non-contacting technique for detecting the distribution of power generation current inside the MEA using the static magnetic field around the PEFC is examined. The estimating method of the generation current distribution using the extended evolution strategy by 3D FEM (finite element method) is proposed, and the effectiveness of the method is investigated by verification experiment using an actual fuel cell.

Proposal of Evaluation Method of Power Generation Current and Defect inside MEA by Inverse Problem Analysis Using Static Magnetic Field around PEFC

“…If the weight amount α is smaller than 1.0x10 -5 , the calculation is finished. On the other hand, if the weight amount α is larger than 1.0x10 -5 , h is counted and the probability p to tolerate failure in formula ( 5) is replaced by the following equation: [6] Then, these processes are repeated until convergence.…”

“…Moreover, the intensity of the static magnetic field is influenced by distribution or strength of the power generation current inside the fuel cell. Therefore, there is a possibility that the distribution of power generation current inside MEA can be determined using the static magnetic field around the fuel cell (5)(6)(7). In this paper, the estimating method of the power generation current inside MEA by the strength of measured static magnetic field around the actual PEFC is proposed.…”

Estimation of Current Distribution inside MEA in Single Cell Type PEFC by Particle Filter Using Circumference Magnetic Field

“…The distribution of the static magnetic field is influenced by the distribution of the power generation current in the fuel cell. Therefore, the current distribution in the fuel cell may be able to presume using the magnetic field distribution around the fuel cell (5)(6)(7). In this paper, the distribution of the static magnetic field around the PEFC is measured, and the presumed technology of the distribution of the power generation current inside the MEA by an inverse problem analysis is proposed.…”

Fault detection for polymer electrolyte membrane fuel cell stack by external magnetic field

“…Yamanshi and al. [33] also investigated fuel cell diagnosis by measuring the magnetic field, and an additional study was done in [34]. In these studies, a genetic algorithm is used to find a linear combination of magnetic field signatures associated to elementary faults.…”