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US 12,592,563 B2Granted
Battery pack and energy storage system
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorYangbo Pan
Life of this patent
Estimating the term…
Abstract
A battery pack and an energy storage system. The battery pack is configured to supply power to an inverter. The battery pack includes a battery, a conversion circuit, and a black start circuit. The conversion circuit is configured to connect to the inverter through a power bus. The black start circuit includes a first auxiliary power supply, a first capacitor, a switch module, an isolation switch, and a control module.
Claims20
A battery pack, configured to supply power to an inverter, wherein the battery pack comprises
- a battery,
- a conversion circuit configured to connect to the inverter through a power bus;
- and
- a black start circuit that
- comprises:
- a first auxiliary power supply;
- a first capacitor connected between a first input end of the first auxiliary power supply and a second input end of the first auxiliary power supply;
- a switch module, wherein a first end of the switch module is connected to the battery and a second end of the switch module is connected to the first input end of the first auxiliary power supply;
- an isolation switch, wherein a control end of the switch module is connected to a first end of the isolation switch and a second end of the isolation switch is connected to a positive electrode of the battery;
- and
- a control module, wherein the second input end of the first auxiliary power supply and a negative electrode of the battery are connected to a reference ground, and
- the control module is configured to:
- when being powered on and a voltage of the power bus is less than a first threshold, control the conversion circuit to output electric energy stored in the battery to the inverter through the power bus;
- the isolation switch is configured to:
- when receiving a black start signal, connect a path between the battery and the control end of the switch module, so that the switch module connects a path between the battery and the first capacitor, to supply power to the first auxiliary power supply after a voltage of the first capacitor reaches a preset voltage;
- and
- the first auxiliary power supply is configured to supply power to the control module after receiving the supplied power.
14 more elements
An energy storage system comprising a plurality of battery packs connected in parallel, connected to a power bus;
- and configured to supply power to an inverter, wherein each battery pack comprises:
- a battery,
- a conversion circuit configured to connect to the inverter through the power bus;
- and
- a black start circuit that
- comprises:
- a first auxiliary power supply,
- a first capacitor connected between a first input end of the first auxiliary power supply and a second input end of the first auxiliary power supply;
- a switch module, wherein a first end of the switch module is connected to the battery and a second end of the switch module is connected to the first input end of the first auxiliary power supply;
- an isolation switch, wherein a control end of the switch module is connected to a first end of the isolation switch and a second end of the isolation switch is connected to a positive electrode of the battery;
- and
- a control module, wherein the second input end of the first auxiliary power supply and a negative electrode of the battery are connected to a reference ground;
- the control module is configured to:
- when being powered on and a voltage of the power bus is less than a first threshold, control the conversion circuit to output electric energy stored in the battery to the inverter through the power bus;
- the isolation switch is configured to:
- when receiving a black start signal, connect a path between the battery and the control end of the switch module, so that the switch module connects a path between the battery and the first capacitor, to supply power to the first auxiliary power supply after a voltage of the first capacitor reaches a preset voltage;
- and
- the first auxiliary power supply is configured to supply power to the control module after receiving the supplied power.
15 more elements
Dependencies are inferred from the claim text.