System

A system comprising:

• a plurality of switching units connected in parallel to a bus to which a power generation unit and a load are connected, each of the plurality of switching units switching ON/OFF of a connection of a battery pack to the bus;
• a plurality of battery packs individually connected to each of the plurality of switching units, each of the plurality of battery packs being identical to the battery pack;
• and
• a management unit which manages the plurality of switching units such that the plurality of battery packs are alternately discharged so that a discharging rate of each of the plurality of battery packs is increased compared to when all of the plurality of battery packs are discharged,
• some of the plurality of switching units comprise a discharging FET and a charging FET which are able to switch between a discharging state in which current flows from the battery pack connected thereto to the bus, a charging state in which the current flows from the bus to the battery pack, and a shut-off state in which the current does not flow between the bus and the battery pack, and rest of the plurality of switching units comprise a contactor connected to the bus, and the discharging FET and the charging FET connected in series between the contactor and the battery pack, and
• the management unit maintains the contactor of the rest of the plurality of switching units in an OFF state while the system is located in an area where lightning is generated.

A system comprising:

• a plurality of switching units connected in parallel to a bus to which a power generation unit and a load are connected, each of the plurality of switching units switching ON/OFF of a connection of a battery pack to the bus;
• a plurality of battery packs individually connected to each of the plurality of switching units, each of the plurality of battery packs being identical to the battery pack;
• and
• a management unit which manages the plurality of switching units such that the plurality of battery packs are alternately discharged so that a discharging rate of each of the plurality of battery packs is increased compared to when all of the plurality of battery packs are discharged, wherein
• some of the plurality of switching units comprise a discharging FET and a charging FET connected in series which are able to switch between a discharging state in which current flows from the battery pack connected thereto to the bus, and a charging state in which the current flows from the bus to the battery pack, and a shut-off state in which the current does not flow between the bus and the battery pack, and rest of the plurality of switching units comprise a contactor which switches ON/OFF of the current between the battery pack connected thereto and the bus.

A system comprising:

• a plurality of switching units connected in parallel to a bus to which a power generation unit and a load are connected, each of the plurality of switching units switching ON/OFF of a connection of a battery pack to the bus;
• a plurality of battery packs individually connected to each of the plurality of switching units, each of the plurality of battery packs being identical to the battery pack;
• and
• a management unit which manages the plurality of switching units such that the plurality of battery packs are alternately discharged so that a discharging rate of each of the plurality of battery packs is increased compared to when all of the plurality of battery packs are discharged,
• all of the plurality of switching units each comprise a contactor connected to the bus, and a discharging FET and a charging FET connected in series between the contactor and the battery pack, and when the contactor is in an ON-state, the discharging FET and the charging FET are able to switch between a discharging state in which current flows from the battery pack connected thereto to the bus, a charging state in which the current flows from the bus to the battery pack, and a shut-off state in which the current does not flow between the bus and the battery pack.

A system comprising:

• a plurality of switching units connected in parallel to a bus to which a power generation unit and load are connected, each of the plurality of switching units switching ON/OFF of a connection of a battery pack to the bus;
• a plurality of battery packs individually connected to each of the plurality of switching units, each of the plurality of battery packs being identical to the battery pack;
• and
• a management unit which manages the plurality of switching units such that the plurality of battery packs are alternately discharged so that a discharging rate of each of the plurality of battery packs is increased compared to when all of the plurality of battery packs are discharged, wherein
• at least any one of the plurality of switching units comprises a discharging FET and a charging FET which are able to switch between a discharging state in which current flows from the battery pack connected thereto to the bus, a charging state in which the current flows from the bus to the battery pack, and a shut-off state in which the current does not flow between the bus and the battery pack, and
• the management unit controls the plurality of switching units to alternately discharge the plurality of battery packs so that a difference in voltage between the battery pack with a highest voltage and the battery pack with a lowest voltage among the plurality of battery packs does not exceed a voltage threshold.