Fault Identification on a Fuel Cell by 3-D Current Density Reconstruction From External Magnetic Field Measurements

WOS:000468263700001International audienceAn original approach of fuel cell diagnosis is presented. It is based on the solving of an inverse linear problem linking the magn e tic field signature outside of the fuel cell to the current density distribution inside. The searched solution is a linear combination of conservative current distribution obtained by a set of electrokinetic problems solved by a finite face element method. As the problem is ill-posed, the solution is stabilized using a truncated singular value decomposition. The approach is validated to reconstruct a 3D current density distribution in a stack simulator and in a fuel cell stack operating in laboratory conditions. Index Terms-Fuel cell, non-invasive diagnosis, current density identification, magnetic measurements, inverse problem