Stafl Systems Introduces Battery Management System 1000 Series
SAN FRANCISCO - Today, Stafl Systems announced the release of a new line of battery management systems for use in a wide variety of applications including electric vehicles, hybrid-electric vehicles, and energy storage.
"Proper management of lithium-ion battery cells is a major issue facing electric vehicles today," said Erik Stafl, president of Stafl Systems. "Our battery management systems maximize the safety, performance and reliability of today's most advanced battery packs."
Battery management systems, BMS, are a vital component of complex battery packs. These systems monitor the temperature and voltage of individual cells, determine the state of charge of the battery pack, balance the charge of the pack across the individual cells and provide critical safety feedback to a vehicle system controller.
The Stafl Systems BMS1000 series use a standard master-monitor configuration, with a BMS master controller that receives data from individual monitors spread across the battery pack. This architecture allows the system to support a variety of battery pack sizes and configurations, while providing excellent measurement accuracy.
The master, available from Stafl Systems as the BMS1000M, manages the entire battery pack and communicates with the external system controller using a standard CAN Bus interface. The master provides information that includes battery state of charge, state of health, cell voltages, cell temperatures, pack voltage, pack current and fault conditions.
The monitors, available from Stafl Systems as the BMS1101S, are used in modules of six to 12 series connected cells per monitor. The monitors have 12 thermistor input channels to collect temperature data throughout the module and have a CAN 2.0B communication interface to connect with the master unit. The BMS1101S can apply a 22 ohm shunt resistor across each cell to bleed off excess charge (passive balancing).