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Austriamicrosystems releases new reference design board for battery management systems
04-07
Austriamicrosystems, a leading supplier of high-performance analog ICs and sensors, has announced a new reference design board that measures current with an accuracy of 1% by monitoring the voltage difference across copper traces on the circuit board. the
Austriamicrosystems' new technology solution using the AS8510 data acquisition front-end helps battery management system (BMS) designers reduce bill-of-materials costs by eliminating the need for precision shunt resistors typically used in current-sensing applications. Precision resistors with low temperature drift typically cost about $1.50 each even in bulk. the
In a battery management system (BMS), accurate current measurement is an essential function that facilitates monitoring the state of charge of the battery or knowing the remaining capacity. A new reference design board from austriamicrosystems provides a blueprint for current measurement in existing battery management systems. This reference design can also be used in electric vehicles, pedal assist vehicles and other applications requiring up to 40A current. Additionally, the design can be easily adapted to measure currents up to 100A using only the trace resistance of the copper on the board. the
The AS8510 chosen for the new reference design by austriamicrosystems is an integrated data acquisition front end that provides two measurement channels with high sensitivity and accuracy. One of the channels measures the current through the voltage drop across a specific area of the copper on the board, and this 10mm area has a well-defined resistance value and temperature coefficient. The other channel is used to measure the temperature of the copper on the circuit board. This temperature measurement can be achieved directly by the AS8510, or an external temperature sensor can be used.