Automotive ASIL D Battery Management System (BMS) Architecture

BatteryMgmt specifies production-grade BMS architectures: dual-core lockstep microcontrollers monitoring cell voltages with 1 mV precision, high-speed pyro-fuse triggers isolating 1,000A short circuits in under 2 ms, and physics-based neural networks estimating SoC and SoP.

Zero-Tolerant Functional Safety for 800V High-Energy Traction Packs

A single overvoltage event or undetected dendrite can trigger catastrophic thermal runaway. BatteryMgmt implements dual-redundant measurement paths, hardware comparator overvoltage traps, and redundant contactor economizers to guarantee ASIL D safety.

Core Engineering Areas

• Dual Extended Kalman Filter SoC — Coupling two concurrent Extended Kalman Filters—one estimating state of charge, the second tracking internal cell ohmic and polarization resistance in real time.
• High-Voltage Contactor Sequencing — Managing pre-charge resistors, main positive/negative contactors, and rapid discharge circuits to prevent welding and arcing during inrush events.
• Pyro-Fuse Short-Circuit Isolation — Deploying micro-gas generator pyrotechnic safety switches to physically sever high-voltage busbars before thermal runaway or battery rupture can propagate.

Technical Articles

• Architecting an ISO 26262 ASIL D Compliant High-Voltage BMS Master
• Overcoming the LFP Flat Voltage Curve: Advanced Kalman Filtering for Iron Phosphate Cells

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