Patent ID: 8030941
Filing Date: 2011-10-04
Classification: G01R

Abstract:
1. A system for measuring individual cell voltages of a fuel cell stack, said system comprising a plurality of voltage scanning units (VSU), each VSU arranged for being connected to a group of cells, belonging to said fuel cell stack, said group of cells being provided with terminals providing for measuring a cell voltage, wherein each VSU comprises a filter/regulator providing a voltage reference signal said voltage reference signal being applied to a first terminal of a first cell of said group of cells, said VSU further comprising a multiplexer arranged for consecutively connecting the other terminals of said group of cells to a first input of an analog to digital converter, said analog to digital converter further being provided with a second input for receiving said voltage reference signal, said analog to digital converter further arranged for being fed with a supply voltage and for analog to digital converting a signal derived from said signals at said first and said second input.