US 12,009,669 B2
Power feeding system and power management device
Takuma Mitsunaga, Tokyo (JP); Katsuo Naoi, Tokyo (JP); Shingo Suzuki, Tokyo (JP); Hisakazu Uto, Tokyo (JP); and Masao Ichi, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Appl. No. 17/640,493
Filed by TDK CORPORATION, Tokyo (JP)
PCT Filed Mar. 25, 2020, PCT No. PCT/JP2020/013410
§ 371(c)(1), (2) Date Dec. 21, 2022,
PCT Pub. No. WO2021/192107, PCT Pub. Date Sep. 30, 2021.
Prior Publication US 2023/0155391 A1, May 18, 2023
Int. Cl. H02J 3/46 (2006.01); H02J 3/32 (2006.01); H02J 3/38 (2006.01); H02J 7/35 (2006.01)
CPC H02J 3/46 (2013.01) [H02J 3/32 (2013.01); H02J 3/381 (2013.01); H02J 7/35 (2013.01); H02J 2207/20 (2020.01); H02J 2300/20 (2020.01)] 8 Claims
OG exemplary drawing
 
1. A power feeding system comprising:
a direct current (DC) bus for supplying DC power;
a renewable energy power generation device connected to the DC bus;
a first converter connected to the DC bus and configured to convert a bus voltage supplied to the DC bus into a load voltage supplied to a load device;
a storage battery;
a second converter provided between the storage battery and the DC bus and capable of bidirectionally converting between the bus voltage and a battery voltage of the storage battery; and
a power management device configured to control the second converter to charge and discharge the storage battery,
wherein the power management device controls the second converter to change the bus voltage based on difference power obtained by subtracting load power supplied to the load device from supply power supplied to the DC bus, the supply power including generated power generated by the renewable energy power generation device.