Panasonic Intellectual Property Management Co., Ltd.

Yasumasa Isshiki

Jun Kikuchi

Noriharu Kobayashi

Mutsuhiko Takeda

Hisashi Ono

A management device manages a power storage module including n series-connected power storage blocks (n: an integer of 2 or greater) each having m parallel-connected power storage cells (m: an integer of 1 or greater). In the management device, a voltage detector detects voltages across the respective n power storage blocks. A storage unit stores the detected voltages of the power storage blocks on a time-series basis. A voltage drop rate calculator calculates voltage drop rates of the power storage blocks about the voltages of the power storage blocks. An abnormality determiner determines that one of the n power storage blocks contains an abnormal power storage cell if a difference between the voltage drop rate of the one power storage block and an average value or a median value of the voltage drop rates of the remaining power storage blocks is greater than or equal to a first predetermined value.

Management device and power storage system

In management device () for managing power storage device () in which a plurality of power storage blocks (Bto B) in which a plurality of series circuits of fuses and power storage cells is connected in parallel is connected in series, equalization controllerperforms, when a voltage difference among the power storage blocks exceeds a set voltage difference, a control for equalizing power storage blocks (Bto B). Fuse blowout determination unitdetermines, based on a frequency of equalization performed by equalization controller, whether one of the fuses is blown.

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Hyogo, Japan

Yasumasa Isshiki