US 2024/0186791 A1 · ENERGY STORAGE SYSTEM AND CONTROL METHOD THEREOF

Abstract

An energy storage system includes a DC bus, an energy storage converter, n first battery racks and m energy storage units. The DC bus has a positive bus and a negative bus. The energy storage converter is electrically connected to the DC bus. Each of the n first battery racks is electrically connected between the positive bus and the negative bus directly. Each of the m energy storage units includes a second battery rack and a DC/DC converter. The DC/DC converter is electrically connected between the corresponding second battery rack and the DC bus. The DC/DC converter performs electric energy conversion between the corresponding second battery rack and the DC bus.

Claims20

Dependent claims

An energy storage system, comprising:

a DC bus having a positive bus and a negative bus;
an energy storage converter electrically connected to the DC bus, and configured to convert AC electric energy from an AC source into DC electric energy, or convert DC electric energy from the DC bus into AC electric energy;
n first battery racks, wherein n is a positive integer, and each of the n first battery racks is electrically connected between the positive bus and the negative bus directly;
and
m energy storage units, wherein m is a positive integer, and each of the m energy storage units comprises a second battery rack and a DC/DC converter, wherein the DC/DC converter is electrically connected between the corresponding second battery rack and the DC bus, and configured to perform electric energy conversion between the corresponding second battery rack and the DC bus.

2 more elements

A control method for an energy storage system, the energy storage system comprising a DC bus, an energy storage converter, n first battery racks and m energy storage units, the DC bus having a positive bus and a negative bus, the energy storage converter being electrically connected to the DC bus, each of the n first battery racks being electrically connected between the positive bus and the negative bus directly, each of the m energy storage units comprising a second battery rack and a DC/DC converter, and the DC/DC converter being electrically connected between the corresponding second battery rack and the DC bus, wherein the control method comprises:

providing a control module, wherein the control module is electrically connected with the DC bus, the n first battery racks and the second battery racks and the DC/DC converters of the m energy storage units;
and
the control module controlling an operation state of the DC/DC converter of each energy storage unit according to a power of the DC bus, a power of each first battery rack and a power of each second battery rack.

Dependencies are inferred from the claim text.

Energy storage system and control method thereof

Life of this patent

Energy storage system and control method thereof

Life of this patent

Abstract

Claims20