ams OSRAM AS8510 Copper Shunt Reference Design provides a blueprint to achieve linear current measurement up to 100A with an accuracy of ±1% by monitoring the voltage drop across a PCB's copper track. The reference design takes advantage of the very high sensitivity and precision of the AS8510, an integrated data acquisition front end that provides two measurement channels. By using a technique involving the ams OSRAM AS8510 data-acquisition front end, designers of Battery Management Systems (BMS) can eliminate the precision shunt resistor normally used in current-sensing applications. The ams OSRAM AS8510 Copper Shunt Reference Design is intended for a current range of ~40A operation and 60A maximum.
The kit consists of a four-layer PCB with all components mounted on the top side:
Top and bottom layers are used for routing of digital signals
Inner layers transport the current and act as the measurement shunt resistance
AS8510 Block Diagram
ams OSRAM AS8510 Data Acquisition Front-End IC
Measures battery current from mA up to kA with 100μΩ shunt resistor in series with the battery rail.