公开(公告)号：US10882404B2

公开(公告)日：2021-01-05

申请号：US16326327

申请日：2017-10-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Naohisa Morimoto

IPC: B60L3/00 ,  G01R27/18 ,  G01R31/50 ,  G01R31/40 ,  G01R31/00 ,  G01R31/36

Abstract: A capacitor is connected between an output terminal of an impedance element and an electricity storage unit mounted in a vehicle, and the electricity storage unit is electrically insulated from a chassis of the vehicle. An earth fault determiner determines that an earth fault occurs, when a detection value based on a peak-to-peak value of a voltage at a node between the impedance element and the capacitor is less than or equal to a first reference value and more than or equal to a second reference value. The first reference value is set based on the peak-to-peak value of the voltage at the node when an insulation resistance between the electricity storage unit and the chassis of the vehicle is a minimum allowable value. The second reference value is set based on the peak-to-peak value of the voltage at the node when a complete earth fault occurs between the electricity storage unit and the chassis of the vehicle.

公开(公告)号：US11056886B2

公开(公告)日：2021-07-06

申请号：US16615523

申请日：2018-04-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masaki Kato ,  Naohisa Morimoto ,  Masaaki Kuranuki ,  Jun Yamasaki ,  Yohei Ishii ,  Koichi Sawada

IPC: H02J3/32 ,  H02J7/00 ,  H02J7/02 ,  H02J7/34 ,  H02M1/12 ,  H02M7/5387 ,  H01M10/42 ,  H01M10/48

Abstract: In a power storage system, a three-phase AC wire is connected to a three-phase AC power system. Power storage blocks, each of which includes a power storage module and a power conditioner, are connected in parallel to the three-phase AC wire. A system controller individually controls power storage blocks. The power storage modules each includes: a power storage unit; and a management unit that manages the power storage unit. The power conditioner includes a power converter and a controller. The power converter converts DC power discharged into single-phase AC power and outputs the converted AC power to two lines of the three-phase AC wire, or converts single-phase AC power received from the two lines of the three-phase AC wire into DC power and charges the power storage unit. The controller is connected to the system controller via a communication line and the management unit via a communication line.