ABNORMALITY DIAGNOSTIC DEVICE AND ABNORMALITY DIAGNOSTIC METHOD FOR MOSFET SWITCH ELEMENT

An abnormality diagnostic for a MOSFET switch element in a rechargeable battery pack for determining a short circuit abnormality (fusion) in a MOSFET switch element that causes a charge current to flow in. An on/off controller turns off a MOSFET causing a charge current to flow into a battery module...

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Bibliographische Detailangaben
Hauptverfasser:	ITO Tomoyuki, NIIMURA Kazuhiro, HATANO Junichi, YAMAMOTO Satoshi, KURAISHI Mamoru, TSUTSUI Yusuke, HIROSE Shinji, NISHIGAKI Kenji
Format:	Patent
Sprache:	eng
Schlagworte:	CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS SYSTEMS FOR STORING ELECTRIC ENERGY TESTING
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Beschreibung
Zusammenfassung:	An abnormality diagnostic for a MOSFET switch element in a rechargeable battery pack for determining a short circuit abnormality (fusion) in a MOSFET switch element that causes a charge current to flow in. An on/off controller turns off a MOSFET causing a charge current to flow into a battery module, a start-of-charge instruction unit transmits to a charger an instruction signal to start a charging operation, and a short circuit abnormality diagnostic unit determines, based on a current sensor output, whether current is flowing through the MOSFET due to the charging operation to diagnose a short circuit abnormality in the MOSFET. After diagnosis of the MOSFET, a diagnosis of a short circuit abnormality in a MOSFET that causes a discharge current to flow out of the battery module is performed, and then a diagnosis of a short circuit abnormality in a charge relay is performed.