Solar power storage module, and solar power storage system and solar power supply system having same

摘要

A solar power supply system includes a power supply bus and a plurality of solar power storage systems. The power storage systems is electrically connected to each other in parallel via the power supply bus. Each of the solar power storage systems includes solar power storage modules and an inverter electrically connected to an external load and the solar power storage modules in series. Each of the solar power storage modules includes a lithium-ion battery unit, a solar cell unit, and a battery control unit. The solar cell unit charges the lithium-ion battery unit. The battery control unit is electrically connected to the lithium-ion battery unit and the solar cell unit, and controls the lithium-ion battery unit being charged or discharged.

主权项

1. A solar power storage module for a solar power storage system, comprising:
a lithium-ion battery unit; a solar cell unit that charges the lithium-ion battery unit; and a battery control unit electrically connected to the lithium-ion battery unit and the solar cell unit, the battery control unit controlling the lithium-ion battery unit being charged or discharged, wherein the battery control unit comprises:
a first output,a second output, anda discharge protection circuit electrically connected to the first output, the second output, the lithium-ion battery unit, and the solar cell unit;wherein the lithium-ion battery unit and the solar cell unit supply power to an external load via the first output and the second output; the lithium-ion battery unit has a cut-off discharge voltage; the discharge protection circuit breaks the electrical connection between the lithium-ion battery unit and the second output, and shorts the first output and the second output when an operation voltage of the lithium-ion battery unit is equal to or smaller than the cut-off discharge voltage such that the lithium-ion battery unit and the solar cell unit ceases supplying power to the external load.