Battery management system improves safety, extends lifetime
Microvast Holdings has announced the fifth generation of its battery management system, called BMS 5.0. The system is expected to be available late 2023. The brain of the battery pack, the battery management system (BMS) measures cell voltages, module temperatures, and battery pack current. It also detects isolation faults and controls the contactors and the thermal management system.
The new BMS 5.0 supports a lower total cost of ownership by extending the battery pack lifetime through more efficient and accurate measurements of the state of charge, health, and power. The BMS 5.0 has been developed with safety and security first engineering practices, which improves overall vehicle safety and eliminates catastrophic failures through meeting automotive functional safety “ISO 26262” and automotive cybersecurity “ISO 21434” standards. Microvast’s BMS 5.0 has built-in digital twin technology, which enables early prediction and prompt maintenance.
BMS 5.0 offers de facto battery state estimation standards, delivering state of charge estimation accuracy with a minimal error rate using the closed-loop SOC estimation strategy based on Kalman filtering, ampere-hour integration, static correction, two-terminal correction, and proprietary algorithms. BMS 5.0 also implements data-driven machine learning and physics-based models with cloud support, including self-learning online simulations and computation of capacity and internal resistance, monitoring remaining useful life (RUL) and state of health (SOH) with negligible accuracy error rate.
Microvast provides 3P (Predict-Prevent-Protect) safety management. A Digital Twin protects cells from damage, abuse or failure by actively intervening with software controls and specialized electronics to predict internal resistance, failures and isolating the failing components to prevent failures for the rest of the battery pack. BMS 5.0’s thermal runaway detection identifies cell failures and supports two-way wake-up of primary and replica boards during hibernation with pressure detection sensors.
BMS 5.0 is fully configurable for all Microvast cell chemistries and battery characteristics. It also provides state of the art equalization — maximum battery pack capacity based on the custom consistent power balancing strategy.
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