Nec Corporation

Masataka Atsuki

Hiroyuki Nagano

In order to determine a monitoring circuit having a leak current equal to or more than a predetermined reference, the monitoring deviceincludes the determination unitthat determines whether a leak current of a specific monitoring circuit, among a plurality of monitoring circuitsthat are driven using electric power stored in two or more battery unitsassociated as a monitoring target, is equal to or more than a first reference using: a comparison result of comparison between a proportion of the specific monitoring circuitbeing associated with a low-voltage battery unit having the lowest voltage value among the plurality of battery unitsand a predetermined threshold value; and information indicating whether or not the number of low-voltage battery units associated with the specific monitoring circuitis 2 or more.

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Tokyo, Japan

Masataka Atsuki