POWER STORAGE DEVICE AND BATTERY MONITORING DEVICE

PROBLEM TO BE SOLVED: To improve reliability in a battery monitoring device and a power storage device having the battery monitoring device.SOLUTION: The power storage device comprises: a cell balance circuit CLBALn; a voltage measurement circuit VMES; a cell balance control section BALCT; and a dia...

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Bibliographische Detailangaben
Hauptverfasser:	SO YASUAKI, ANAMI NAOYUKI, GOTO ARATA, ENDO HITOSHI, KATO HIROYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS 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 PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY TESTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To improve reliability in a battery monitoring device and a power storage device having the battery monitoring device.SOLUTION: The power storage device comprises: a cell balance circuit CLBALn; a voltage measurement circuit VMES; a cell balance control section BALCT; and a diagnostic section DIAG, for example. The VMES measures voltage VD of a common connection node Nc between a transistor FETn and a resistance R0 in the CLBALn, voltage VC [N+1] and VC [N] of a positive electrode node Np and a negative electrode node Nn in a battery cell BATCL. The BALCT controls on/off of the FETn on the basis of a first differential value between the VC [N+1] and the VC [N]. The DIAG diagnoses presence/absence of abnormalities in the CLBALn on the basis of first information indicating on/off of the FETn, a second differential value between the VC [N+1] and the VD, and a third differential value between the VD and the VC [N].