Title:
直流電源システム
Document Type and Number:
Japanese Patent JP6817892
Kind Code:
B2
Abstract:
To effectively use power generated by a photovoltaic power generation device while preventing inconvenience caused by the overvoltage charging of a storage battery.SOLUTION: A DC power supply system 1 includes: a photovoltaic power generation device 40 which receives photovoltaic power to generate electric power; a storage battery 30 which receives power supply from the photovoltaic power generation device 40 to enable charging; a load 50 which receives power supply from one or more out of an external commercial power supply 10, the photovoltaic power generation device 40 and the storage battery 30; a switch 23 which switches, as a power supply path to the load 50, the connection of the storage battery 30 to a bus 60 to which the commercial power supply 10 and the photovoltaic power generation device 40 are connected; and a control unit 22 which measures a bus voltage to control the switch 23 to change the connection of the storage battery 30 according to the obtained bus voltage.SELECTED DRAWING: Figure 1
Inventors:
Nakamura Yuuki
Kazuaki Kimura
Kazuhiko Takeno
Kazuaki Kimura
Kazuhiko Takeno
Application Number:
JP2017098305A
Publication Date:
January 20, 2021
Filing Date:
May 17, 2017
Export Citation:
Assignee:
Ntt docomo, Inc.
International Classes:
H02J1/00; H01M10/44; H01M10/48; H02J3/32; H02J3/38; H02J3/46; H02J7/35
Domestic Patent References:
| JP2016220461A | ||||
| JP2011250665A | ||||
| JP2000245074A |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshiki Kuroki
Takashi Okiyama
Kenji Fukaishi
Yoshiki Kuroki
Takashi Okiyama
Kenji Fukaishi