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Intersil’s ISL78600 HEV/EV system is designed and tested to address the safety, reliability and performance requirements of the hybrid, plug-in hybrid (PHEV) and electric vehicle markets.

Featuring an automotive-grade Li-Ion battery-management system and safety monitor, the automotive grade (AEC-Q100) ISL78600 multi-cell solution provides customers with ISO26262 (ASIL) compliance to prevent battery pack failures.

The solution also provides built-in fault detection for all of its major internal functions and detects external faults such as open wire, over and under voltage, as well as temperature and cell-balancing faults.

The ISL78600 battery-management system provides the high accuracy needed for precise state-of-charge measurements to extend vehicle driving range and the life of high-performance Li-Ion batteries.

To accomplish this, each ISL78600 device utilises a 14-bit temperature compensated data converter that scans 12 channels in less than 250 microseconds.

Average mid-size HEV vehicles today utilise 126 to 168 cells, which can be addressed with 11 to 14 ISL78600s per vehicle.

When combined with four external temperature sensors, the ISL78600 provides superior accuracy for state-of-charge measurements across the full battery operating temperature range.

To achieve the highest possible reliability for intra-system communication, the ISL78600 utilises a high noise immunity and transient tolerant communication scheme.

This fully differential daisy-chain architecture allows the use of low cost twisted pair wiring to stack multiple battery packs together while protecting against hot plugging and high voltage transients.

The benefits offered by the Intersil HEV/EV system solution can significantly reduce overall battery-management system costs.

The ISL78600 allows for easy connection to microcontrollers via either a 2.5MHz SPI or 400KHz I2C interface, and is specified for -40 to 105C operation.

While targeted at the HEV/EV market, the solution can easily be adapted to address industrial and battery back-up applications.

Also available from Intersil is the ISL78601 multi-cell battery monitor, which enables standalone or independent redundant fault monitoring.

The ISL78600 is available in a 10 x 10mm 64-lead TQFP package.

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