ASIL D Complaint Chip Enables Fast & Accurate Battery Management In EVs

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Maxim has launched a new battery sensor data acquisition chip to improve the safety of lithium-ion battery packs in electric vehicles. The chip claims to be the industry’s first to comply with the highest safety standards, including ISO 26262 and ASIL D requirements.

Automotive OEMs can enhance the safety of their lithium-ion battery packs with robust communications, comprehensive diagnostics, and lower system costs with the MAX17843 12-channel, high-voltage smart sensor data-acquisition device from Maxim.

“Electric vehicles (EVs), hybrid EVs, and plug-in hybrids rely on large lithium-ion battery packs filled with hundreds or even thousands of individual battery cells. With industry experts predicting that 25% of cars sold by 2025 will have electric engines, automotive OEMs and Tier 1s need an intelligent battery management system to enable safe, low-cost solutions with robust communications”, the announcement noted.

The chip features a differential universal asynchronous receiver/transmitter (UART) using capacitive isolation that reduces bill of materials (BOM) costs and failure in time (FIT) rates.

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“With this, designers can save up to 90% of their isolation BOM cost”, claims Maxim,

The UART, with ultimate flexibility, enables robust communications in noisy environments.

Leveraging a daisy-chain architecture and a successive-approximation-register (SAR) analog-to-digital converter (ADC), the chip can capture fast, accurate voltage measurements and deliver high EMC performance, Maxim further said.

“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.”

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“It goes without saying that there’s no room for compromise when it comes to automotive safety,” said Tamer Kira, Director, Automotive Business Unit at Maxim Integrated. “The MAX17843 gives our customers the functionality necessary for safe and intelligent battery management operation.”

The device operates over the -40-deg C to +125-deg C temperature range and is available in a 64-pin LQFP package (10mm x 10mm) package.

The MAX17843 is available at Maxim’s website for $7.61 (1000-up, FOB USA)
The MAX17843EVKIT# evaluation kit is available for $1,000

Click here for details.

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