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Electrical Control Module The electrical control module contains two groups of components: the battery controller and the sensors, and electrical hardware required to control the battery operation. The module consists of the following: DC bus contactor, DC current transducer, DC mains connections, ambient temperature sensor, internal DC bus (battery controller side of contactor), external DC bus (system connector side of contactor), system ground bus, power connector, and cell stack connector. Battery Controller/Data and Control Interfaces The battery controller is a microprocessor-based controller that controls, monitors, and ensures the safe operation of the VRB-ESS. The controller also provides a communication interface that allows: • Information to be passed to external systems to ensure proper charge control; • The VRB-ESS to be charged and discharged appropriately; and • External systems to monitor the operation. Data and control interfaces for data and control signals are made to the VRB-ESS at the battery controller quick-disconnect plugs (see figure below). Battery controller interfaces (Courtesy: Prudent Energy). Data transmission is based on SMA Net communication protocol that is binary, master/slave, and the messages transmitted are frame based (9600 Baud Rate, 8 Data Bits, No Parity, 1 Stop Bit). The Command and Data Messages are the two message frames transmitted: the Command Message is a request to receive data from the auxiliary equipment by the Battery Controller, and the Data Message is the response of transmitting data to the auxiliary equipment. The battery controller connectors service both onboard components of the battery and outside connections to the auxiliary system. The Battery Controller has 32 predefined addresses, 20 in hexadecimal, and a transfer mask is used to communicate which data channels shall be transmitted.PDF Image | Advanced Battery Storage Systems Testing at ACEP VRB ESS
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