Arc detection method for performing protection in energy storage system, and related apparatus

A control apparatus, comprising:

• a processor, wherein the processor is configured to execute a stored program, to perform operations, the operations comprising:
• obtaining, by the processor, an electrical signal at an electrical connection point in an energy storage system, wherein the energy storage system comprises a battery module, a battery management system (BMS), and a direct current-direct current (DC-DC) converter;
• and wherein the electrical connection point comprises a connection point between the battery module and the BMS, a connection point between the BMS and the DC-DC converter, or a connection point between the DC-DC converter and a load circuit;
• determining, by the processor, a frequency domain amplitude of the electrical signal based on a frequency domain characteristic of the electrical signal;
• and
• controlling, by the processor, the energy storage system to perform an arc extinguishing and protection operation on the electrical connection point in response to that the frequency domain amplitude of the electrical signal is greater than a preset amplitude, wherein the controlling, by the control apparatus, the energy storage system to perform the arc extinguishing and protection operation on the electrical connection point comprises:
• controlling, by the control apparatus, the DC-DC converter to generate a reverse electrical signal, comprising:
• controlling an electric potential to change and outputting a reverse electric potential based on a requirement.

An energy management system, comprising:

• an energy storage system comprising:
• a battery module configured to provide electric energy;
• a battery management system (BMS) configured to detect a status of the battery module;
• a direct current-direct current (DC-DC) converter configured to perform conversion between a high-voltage direct current signal and a low-voltage direct current signal;
• and
• a sensor configured to detect an electrical signal at an electrical connection point;
• and
• a control apparatus configured to perform operations, the operations comprising:
• obtaining the electrical signal at the electrical connection point in the energy storage system, wherein the electrical connection point comprises a connection point between the battery module and the BMS, a connection point between the BMS and the DC-DC converter, or a connection point between the DC-DC converter and a load circuit;
• determining a frequency domain amplitude of the electrical signal based on a frequency domain characteristic of the electrical signal;
• and
• controlling the energy storage system to perform an arc extinguishing and protection operation on the electrical connection point in response to that the frequency domain amplitude of the electrical signal is greater than a preset amplitude, wherein the controlling the energy storage system to perform the arc extinguishing and protection operation on the electrical connection point comprises:
• controlling the DC-DC converter to generate a reverse electrical signal, comprising:
• controlling an electric potential to change and outputting a reverse electric potential based on a requirement.