ASIL D battery management system targets electric vehicle charging

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By Nick Flaherty

Electric vehicles can have hundreds or even thousands of individual battery cells and these need an intelligent battery management system to enable safe, low cost solutions with robust communications. 

The MAX17843 battery management system (BMS) meets ASIL D requirements (also applicable for ASIL C) and is certified by TUV. Its differential universal asynchronous receiver/transmitter (UART) using capacitive isolation reduces bill of materials (BOM) costs and failure in time (FIT) rates. With this, designers can save up to 90% of their isolation BOM cost. The flexible UART provides robust communications in noisy environments. Maxim’s unique proprietary daisy-chain architecture and successive-approximation-register (SAR) analogue-to-digital converter (ADC) allows the chip to capture fast, accurate voltage measurements and delivers high EMC performance. It is applicable for a variety of automotive and EV powertrain applications. 

“The BMS market is expected to grow at a CAGR of 43% from 2016 to 2021,” said Siddharth Jaiswal, automotive industry analyst at Technavio. “This ASIL D-certified battery management system by Maxim proactively detects faults and is extremely important to the safety of vehicles.”

The MAX17843 operates over the -40ºC to +125ºC range and is available in a 64-pin LQFP package (10mm x 10mm).  It costs $7.61 (1000-up) and the MAX17843EVKIT# evaluation kit is available for $1,000. 



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