Verfahren zum Verbessern der Zuverlässigkeit eines Brennstoffzellensystems mit Hilfe von Detektion einer leistungsschwachen Zelle bei Betrieb mit niedriger Leistung

Verfahren zum Verbessern der Zuverlässigkeit eines Brennstoffzellensystems mit Hilfe von Detektion einer leistungsschwachen Zelle bei Betrieb mit niedriger Leistung

A system and method for detecting a low performing cell in a fuel cell stack using measured cell voltages. The method includes determining that the fuel cell stack is running, the stack coolant temperature is above a certain temperature and the stack current density is within a relatively low power...

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Hauptverfasser: CHOI, TAYOUNG, JUNG, JAEHAK, SAVAGE, DAVID R, GANAPATHY, SRIRAM, LAKSHMANAN, BALASUBRAMANIAN, VECASEY, PAMELA M
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Sprache:ger
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BASIC ELECTRIC ELEMENTS
ELECTRICITY
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
TESTING
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creator CHOI, TAYOUNG
JUNG, JAEHAK
SAVAGE, DAVID R
GANAPATHY, SRIRAM
LAKSHMANAN, BALASUBRAMANIAN
VECASEY, PAMELA M
description A system and method for detecting a low performing cell in a fuel cell stack using measured cell voltages. The method includes determining that the fuel cell stack is running, the stack coolant temperature is above a certain temperature and the stack current density is within a relatively low power range. The method further includes calculating the average cell voltage, and determining whether the difference between the average cell voltage and the minimum cell voltage is greater than a predetermined threshold. If the difference between the average cell voltage and the minimum cell voltage is greater than the predetermined threshold and the minimum cell voltage is less than another predetermined threshold, then the method increments a low performing cell timer. A ratio of the low performing cell timer and a system run timer is calculated to identify a low performing cell.
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subjects BASIC ELECTRIC ELEMENTS
ELECTRICITY
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
TESTING
title Verfahren zum Verbessern der Zuverlässigkeit eines Brennstoffzellensystems mit Hilfe von Detektion einer leistungsschwachen Zelle bei Betrieb mit niedriger Leistung
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