Multiplexer and system for supplying current to an electrochemical cell stack
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United States of America Patent
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app pub date -
May 2, 2005
filing date -
Mar 17, 2005
priority date (Note) -
Abandoned
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Abstract
Embodiments of the present invention relate to multiplexing apparatus, systems and methods for use in diagnostic testing of an electrochemical cell stack, such as a fuel cell stack or an electrolyzer cell stack. According to one embodiment, the apparatus comprises a multiplexer for switching current to one or more cells in the electrochemical cell stack and a power supply module for supplying power to the multiplexer. The apparatus further comprises a control module electrically connected to and configured to control the multiplexer and the power supply module to supply current to individual cells or groups of cells during automatic diagnostic testing of the electrochemical cell stack. The multiplexer comprises a microprocessor and a plurality of switching circuits adapted to supply current or voltage from the power supply module to the cells.
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