AS8510 Battery Monitor Helps Inform Drivers of Range Availability
Austria-based Ams is promoting the role of its AS8510 integrated sensor interface to monitor the 400-volt lithium ion battery packs in BMW’s all-electric i3 series vehicles, thus helping drivers stay informed of their cars’ range availability.
“Optimization of energy storage and battery life are essential for EVs in order to provide customers with sufficient range and reliability,” Ams says. The AS8510 enables the car’s battery management system to make a highly accurate calculation of a battery’s state of charge. “This means that the driver benefits from an accurate estimation of the range the vehicle can cover before the battery is completely discharged.”
“Features of the AS8510, including its zero-offset architecture, low noise, high linearity, its multi-channel architecture and low drift made the task of designing the i series’ current and voltage measurement system easier than using other sensor interface architectures,” Ams says.
‘A New Benchmark’ in BMS Design
“The AS8510 provides integrated data acquisition front ends, which include two independent 16-bit sigma-delta ADCs. Measuring current across a shunt resistor in one channel over a range from a few milliamps up to 1kA, it provides a digital output via a serial peripheral interface. Through the second channel it can capture three different voltage sources simultaneously with current samples.”
Further, the unit “ensures the functional safety of the vehicle’s battery systems.”
“BMW has set a new benchmark in battery management system design in the new i3 model,” Ams automotive VP and general manager Bernd Gessner said in the firm’s AS8510 announcement.
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Source: Ams with Fleets & Fuels follow-up