Large energy storage system bcu

What is a battery energy storage system?

Currently, a battery energy storage system (BESS) plays an important role in residential, commercial and industrial, grid energy storage and management. BESS has various high-voltage system structures. Commercial, industrial, and grid BESS contain several racks that each contain packs in a stack. A residential BESS contains one rack.

What is a Battery Control Unit (BCU)?

Since battery cells require a proper working and storage temperature, voltage range, and current range for lifecycle and safety, it is important to monitor and protect the battery cell at the rack level. battery control unit (BCU) is a controller designed to be installed in the rack to manage racks or single pack energy.

How does a BCU work?

CAN, RS-485, and Ethernet is widely used in the communication interface. The BCU switches relays ON or OFF to keep the rack works safely based on the SOC, SOH, and rack status like rack current, voltage, temperature and insulation status. SOC and SOH is estimated from the accurate information of pack and rack.

What is a BCU & a Hmu?

The BCU is used with the HMU to complete a full function of protection and energy management in at the rack level. The BMU is a controller designed to be installed in the pack to keep monitoring voltage and temperature of each battery cell for the total lifecycle.

What is a battery management unit (BMU)?

Since the battery cells require a proper working and storage temperature, voltage range, current range for lifecycle and safety, the designer must monitor and protect the battery cell in the pack level. battery management unit (BMU) is a controller that monitors the voltage and temperature of each battery cell in the pack for a complete lifecycle.

How does a BCU communicate with a PCs & BSMU?

The BCU needs to transmit the SOC, SOH, and rack status to the PCS and BSMU to operate the whole energy storage function. CAN, RS-485, and Ethernet is widely used in the communication interface.