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 motors, automotive OEMs and Tier 1 suppliers need an intelligent battery management system to enable safe, low-cost solutions with robust communications.
Maxim is enabling a safer, smarter car of the future with the MAX17843 Battery Management System (BMS). The MAX17843 meets the highest safety standards, complying with ISO 26262 and ASIL D requirements (also applicable to ASIL C). Its differential universal asynchronous receiver/transmitter (UART) utilizing capacitive isolation reduces bill of materials (BOM) costs and failure-in-time (FIT) rates. This allows designers to save up to 90% on their isolation BOM costs. The highly flexible UART enables robust communication in noisy environments. Utilizing Maxim's unique, patented daisy-chain architecture and successive approximation register (SAR) ADC, the MAX17843 captures fast, accurate voltage measurements and delivers high EMC performance. It is applicable to a wide range of automotive and EV powertrain applications.
Key advantages
• Safety: ISO 26262 and ASIL D certification, as well as TUV certification in the design and management process; meets various BCI requirements; comprehensive diagnostics
• Low system cost: internal cellular balancing and UART reduce BOM costs compared to competing solutions; only one IC required to enable capacitive or transformer isolation
• Robust communications: reliable distributed and centralized CMC architecture with UART; supports 100m day-chain segments; high noise immunity; supports emission, ESD, and hot-plugging.
