Battery Management Systems

  • a) The BMS is powered by the NXP MC33772, a 6-cell Battery Cell Controller (BCC) specifically designed for applications like drones and rovers. It supports a voltage range of 3.7V (single-cell Li-ion) to 25.2V (6-cell Li-ion). This advanced BCC is equipped to continuously monitor critical battery parameters, ensuring optimal performance and efficiency in low voltage applications.
  • b) Accurate Battery Monitoring: The BCC device integrated into the system performs precise ADC conversions on the differential cell voltages and currents. This enables highly accurate battery charge coulomb counting and temperature measurements, essential for reliable performance.
  • c) Scalable Cell Counts: The NXP MC33772, a 6-cell BCC, is at the heart of the The BMS
  • d) Automotive-Grade Reliability: All components used in the BMS, including the Li-Ion battery cell controller ICs and the NXP's S32K146/144 automotive-grade S32K Microcontroller, adhere to rigorous automotive industry standards. This ensures robust performance in demanding environments such as HEV, EV, ESS, and UPS systems.
  • e) NFC Connectivity: With the onboard NTAG5 Boost NFC NFC Forum-compliant I2C bridge, the BMS seamlessly interacts with external NFC devices, like smartphones. This enables convenient and secure status checking and parameter setting, making battery management hassle-free for end users.
  • f) Enhanced Security: The inclusion of the A1007 secure authenticator IC brings an added layer of security to the battery pack. It features monotonic counters and secure flags to verify the pack's authenticity, track charge cycles securely, and flag critical events like over discharge. Protecting against tampering and ensuring the integrity of the system.
  • g) Seamless Communication: The Dronomy BMS establishes communication with a host, such as a Drone Flight Management Unit (FMU), through industry-standard protocols like UAVCAN or I2C. This enables smooth integration into existing drone systems and facilitates seamless data exchange between the BMS and the FMU.
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