In recent years, large-scale energy storage systems have become the key to a successful energy transition. People often think that power generation is the top priority of the energy industry, but this is not the case from an energy system perspective.
Battery cells, battery energy storage system (BESS) sites and power grid are crucial to the successful storage and transmission of energy systems.
Cell balance
BESS collects data such as voltage, current, and temperature of battery modules or rack-mounted batteries.
cell balancing (i.e. redistributing charge between cells) during the charging and discharging process while managing the risk of thermal runaway can ensure efficient and stable operation of the energy storage cabinet.
Internal balance of BESS site
BESS helps ensure smooth operation of all cabinets across the site. It consists of core systems such as PCS, as well as auxiliary systems such as environmental monitoring, backup power, and access control.
Given the fires that have occurred in the past, it is important to closely monitor the temperature, ventilation, and drainage of the BESS sites. Any potential problems can be properly resolved through remote monitoring.
Grid balancing
BESS can balance the flow of electric energy among power generation, transmission, distribution and consumption.
Energy storage systems can be used in:
Store excess electricity in time when there is a surplus of electricity Rapid power supply
when power demand surges , maintaining grid stability
For example, in 2017, a Tesla energy storage site in South Australia successfully balanced the power grid within milliseconds, effectively avoiding a large-scale power outage.
The peak load reduction and valley filling of the power grid is supported by massive amounts of real-time data. Real-time analysis of data helps to dispatch power decisively and maintain energy balance.
However, due to the lack of unified communication protocols supported by sensors and other system equipment, unpredictable weather and harsh environment leading to unstable power transmission, coupled with various safety issues, it is difficult to obtain these important data.
The BESS industry is full of challenges and it will take time for it to mature. However, the continuous innovation of technology has injected abundant vitality into the energy storage industry and promoted its vigorous development.