US 2023/0420948 A1Published application

Energy storage system and power supply method for battery management system

OwnerChunlei ZHANG, Shijiang YU +1inventors

InventorsChunlei ZHANG, Shijiang YU, Zhipeng WU

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Abstract

This application describes an energy storage system including an energy storage module, a direct current bus, a power conversion module, a first power supply module, a second power supply module, and a battery management system. In some implementations, the first power supply module is configured to: select a larger voltage between an output direct current voltage of the energy storage module and a bus voltage of the direct current bus as an input voltage, and output a first direct current voltage. The first power conversion module is configured to: convert the alternating current mains or an output alternating current voltage of the power conversion module into a second direct current voltage. The second power supply module is configured to: select a larger voltage between the first direct current voltage and the second direct current voltage as a target voltage, and supply power to the battery management system based on the target voltage.

Claims19

Dependent claims

An energy storage system comprising:

an energy storage module;
a direct current bus;
a power conversion module;
a first power supply module;
a second power supply module;
and
a battery management system,
wherein a first input end of the first power supply module is connected to the energy storage module, a second input end of the first power supply module is connected to the direct current bus, an output end of the first power supply module is connected to a first input end of the second power supply module, a second input end of the second power supply module is connected to alternating current mains or the power conversion module by a first power conversion module, and an output end of the second power supply module is connected to the battery management system;
the first power supply module is configured to:
select a larger voltage between an output direct current voltage of the energy storage module and a bus voltage of the direct current bus as an input voltage, and output a first direct current voltage to the second power supply module based on the input voltage;
the first power conversion module is configured to:
convert the alternating current mains or an output alternating current voltage of the power conversion module into a second direct current voltage, and output the second direct current voltage to the second power supply module;
and
the second power supply module is configured to:
select a larger voltage between the first direct current voltage and the second direct current voltage as a target voltage, and supply power to the battery management system based on the target voltage.

12 more elements

A power supply method for a battery management system, wherein the power supply method is applicable to an energy storage system that comprises an energy storage module, a direct current bus, a power conversion module, a first power supply module, a second power supply module, and a battery management system, wherein a first input end of the first power supply module is connected to the energy storage module, a second input end of the first power supply module is connected to the direct current bus, an output end of the first power supply module is connected to a first input end of the second power supply module, a second input end of the second power supply module is connected to alternating current mains or the power conversion module by using a first power conversion module, and an output end of the second power supply module is connected to the battery management system;

and
the power supply method comprises:
selecting, by the first power supply module, a larger voltage between an output direct current voltage of the energy storage module and a bus voltage of the direct current bus as an input voltage, and outputting a first direct current voltage to the second power supply module based on the input voltage;
converting, by the first power conversion module, the alternating current mains or an output alternating current voltage of the power conversion module into a second direct current voltage, and outputting the second direct current voltage to the second power supply module;
and
selecting, by the second power supply module, a larger voltage between the first direct current voltage and the second direct current voltage as a target voltage, and supplying power to the battery management system based on the target voltage.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/465,716Filed 12 Sep 2023
Priority: 17 Mar 2021
Published: 28 Dec 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

H02J 3/32
Arrangements for balancing of the load in networks by storage of energy: using batteries or super capacitors with converting means
H01M 10/425
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells: structural combination with electronic…
H01M 10/44
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells: methods for charging or discharging
H02J 3/001
Circuit arrangements for AC mains or AC distribution networks: arrangements for handling faults or abnormalities, e.g. emergencies or contingencies