STORAGE BATTERY SYSTEM FOR RAILCAR AND CONTROL METHOD THEREFOR

WIPO Patent Application WO/2023/234090

A1

Provided is a storage battery system for a railcar comprising a battery assembly including one or more storage battery boxes containing a plurality of storage battery groups connected in parallel, a parallelization control unit that keeps each of the plurality of storage battery groups at an equal voltage, and a group switchgear device for each group arranged in the storage battery boxes and connected in series to at least one pole of each storage battery group. Each group switchgear device has one switchgear device for each box connected in series to a connection point at which a plurality of storage battery groups are connected in parallel, at the pole opposite the pole to which each group switchgear device is connected in series. The parallelization control unit connects storage battery groups in storage battery boxes in parallel by closing each group switchgear device, and connects storage battery boxes in parallel by closing each group switchgear device and box switchgear device. Accordingly, a storage battery system for a railcar is provided that minimizes the number of contactors required to suppress lateral flow of current between storage battery groups or between storage battery boxes.

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NAITO SHUNYA (JP)
KANEKO TAKASHI (JP)
TAKAHASHI CHIAKI (JP)
MARUKO TAKUYA (JP)
DAIRAKU YOSUKE (JP)

PCT/JP2023/018885

December 07, 2023

May 22, 2023

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HITACHI LTD (JP)

H02J7/34; H02J1/00; H02J7/00; H02J7/02

JP2013226008A	2013-10-31
JP2013206642A	2013-10-07
JP2019122122A	2019-07-22

SUNNEXT INTERNATIONAL PATENT OFFICE (JP)

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