The current intensity distribution of a fuel cell is an important factor that determines its performance. A contactless method that does not affect the fuel cell and can accurately and quickly assess internal cell conditions is required to measure the current distribution. Therefore, this study proposes a simplified method to measure current distribution based on four magnetic field measurements. The proposed method demonstrates that the purge control performed in flooding during constant-current operation results in non-uniform current distribution, despite effective voltage recovery. This study shows that the method is useful to eliminate the non-uniformity of current distribution for improving long-term operation of fuel cells.
Keywords Fuel cell, magnetic sensor, control, failure detection