FUEL BATTERY CHARACTERISTICS DIAGNOSING METHOD AND DIAGNOSING DEVICE

• Main Authors: DAIGO AKIHIKO, SUGIURA KIMIHIKO, MURAKAMI TETSUYA
• Format: Patent
• Language: English
• Published: 28.05.2009
• 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

PROBLEM TO BE SOLVED: To provide a fuel battery characteristics diagnosing method by which one cycle of characteristics diagnosis can be carried out in an extremely short time, using a simple device, and to provide a diagnosing device. SOLUTION: Fuel battery characteristics diagnosis is carried out by simulating an equation of an output voltage Vout (t) at constant current application to the battery via an equivalent circuit model incorporating therein divided electrodes of the fuel battery 1. The output voltage Vout from the fuel battery 1 at constant current application to the battery is measured for each of a plurality of time segments given by dividing a given diagnosis time set based on the stabilization time of a transient response into a plurality of time segments. For resulting actual measurements, characteristics reference parameters A1 to A3 and t1 to t3 are calculated by fitting, respectively, the parameters being set on the output voltage equation corresponding to the plurality of time segments. The calculated parameters are compared with preset initial value parameters in calculation to diagnose the characteristics of the fuel battery 1. COPYRIGHT: (C)2009,JPO&INPIT