US 12,451,722 B2
Backup power supply system, mobile object, backup power supply system controlling method, and program
Yuta Nagatomi, Osaka (JP); Masafumi Nakamura, Mie (JP); Masatoshi Nakase, Mie (JP); Hiroki Akashi, Osaka (JP); and Kinya Kato, Shiga (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 18/569,626
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Aug. 17, 2022, PCT No. PCT/JP2022/031068
§ 371(c)(1), (2) Date Dec. 13, 2023,
PCT Pub. No. WO2023/026922, PCT Pub. Date Mar. 2, 2023.
Claims priority of application No. 2021-139309 (JP), filed on Aug. 27, 2021.
Prior Publication US 2024/0275202 A1, Aug. 15, 2024
Int. Cl. H02J 9/06 (2006.01); H02J 7/00 (2006.01); H02J 7/34 (2006.01)
CPC H02J 9/061 (2013.01) [H02J 7/00714 (2020.01); H02J 7/34 (2013.01); H02J 2207/20 (2020.01)] 14 Claims
OG exemplary drawing
 
1. A backup power supply system, comprising:
a first terminal configured to be connected to a main power supply;
a second terminal configured to be connected to a load;
a disconnect device connected between the first terminal and the second terminal, the disconnect device being switchable between a connecting state and a disconnecting state;
an auxiliary power supply configured to supply power to the load in a defective state in which the main power supply is defective;
a charge/discharge device connected between the auxiliary power supply and a node between the disconnect device and the second terminal, the charge/discharge device being configured to
receive power supplied from the main power supply to cause a charging current to flow to the auxiliary power supply in a non-defective state in which the main power supply is not defective, and
receive power supplied from the auxiliary power supply to cause a discharging current to flow from the auxiliary power supply to the load in the defective state;
a current detector configured to detect at least the discharging current flowing from the charge/discharge device; and
a controller configured to
control the disconnect device to be in the connecting state while the current detector does not detect the discharging current, and
control the disconnect device to be in the disconnecting state while the current detector detects the discharging current,
wherein the current detector detects whether any discharging current flows or not, and the controller controls the disconnect device to be in the disconnecting state while the current detector detects that any discharging current flows.