System and method for measuring fuel cell voltage

Electricity: measuring and testing – Electrolyte properties – Using a battery testing device

Reexamination Certificate

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C320S116000

Reexamination Certificate

active

08030941

ABSTRACT:
A system for measuring individual cell voltages of a fuel cell stack includes a plurality of voltage scanning units (VSU). Each VSU is arranged for being connected to a group of cells, belonging to the fuel cell stack, the group of cells being provided with terminals that allow measuring a cell voltage. Each VSU comprises a filter/regulator that provides a voltage reference signal Vref, that is applied to a first terminal of a first cell of the group of cells. The VSU further includes a multiplexer arranged for consecutively connecting the other terminals of the group of cells to a first input of an A/D converter, whereby the A/D converter is further provided with a second input for receiving the voltage reference signal Vref. The ADC is further arranged for being fed with a supply voltage Vsup+and for A/D converting a signal derived from the signals at the first and second input.

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patent: 5798725 (1998-08-01), Okada
patent: 5952815 (1999-09-01), Rouillard et al.
patent: 6020717 (2000-02-01), Kadouchi et al.
patent: 6064053 (2000-05-01), Chi
patent: 6281684 (2001-08-01), James
patent: 6411097 (2002-06-01), Ashtiani et al.
patent: 1 265 076 (2002-12-01), None
patent: 2002-42906 (2002-02-01), None

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