NXP MR-BMS771: Battery Management Board for Mobile Robotics and Portable Equipment
The NXP MR-BMS771 is a customizable 7-14 cell battery pack Battery Management System (BMS) incorporating automotive grade BCC and MCU components. It is suitable for portable or removable applications such as mobile robotics, two-wheelers, scooters, mowers, medical devices, higher end power tools, UPS, ESS or industrial equipment.
MR-BMS771 Battery Management System
- BMS is suitable for 7-14 cell Li-ion, LiFEPO4, NMC or other chemistries.
- Supported with models and base example via NXP MATLAB Simulink Model-Based Design Toolbox (MBDT).
- BMS example application software based on NuttX RTOS, demonstrating command line customization and configuration via a console connection.
Key Features
- 30 Amps as configured
- Cell balancing, coulomb counting, voltage, 3x temperature and overcurrent protection
- Command line control and config via console
- Automotive grade components
- Secure element certificates and secure logging 2x CAN Bus, NFC*, UART, I²C (SMBus) peripheral an initiator (*Not installed first version)
Target Applications
- Robotic AMR, service robot, drones
- Portable medical
- High end power tools
- Two-wheeler/scooter/golf cart
- UPS/battery backup
- Security and building control systems
Enablement Tools
- Development hardware:
- Schematics and layout source files
- MCU-Link-MR debugger with integrated USBc-uart console
- Runtime software:
- MBDT models and example
- RTOS based application example in NuttX
- Compiler:
- Opensource GCC (NuttX)
- S32 design studio
Technical Specifications
| BCC | MC33771 | |
|---|---|---|
| MCU | S32K148, Arm® M4 core @112 Mhz | |
| Interfaces | UART, CAN FD, SMBus/ I2C, NFC* | |
| Power | 7-14 cell, (9.6 V-59.9 V) 30A as built and tested. FET and heatsink dependencies could allow > 100 A | |
| Security | SE051 | |
| HMI | Graphic OLED, switches, LEDs | |
±0.5% accuracy from milliamps to kiloamps with integrated coulomb counter, 0.8 mV maximum voltage measurement error
Block Diagram
Battery Management Application Block Diagram
Illustrates the system architecture, showing connections for power input/output, battery terminals, external sensors, and communication interfaces like CAN bus, SMBus, and JTAG debugger. The diagram depicts the flow of power and data between the BMS, the system to be powered, and external components.
MR-BMS771 Hardware Block Diagram
Details the internal components of the MR-BMS771, including the Battery Cell Controller (MC33771C), Microcontroller (S32K146), System Basis Chip (UJA1169A), and signal-improved CAN Transceiver (TJA1463). It also shows the integration of NFC and Security elements (SE051, NTAG5) and various peripheral connections.
Orderable Samples
| Part number | Other features | Package |
|---|---|---|
| MR-BMS771 | 7-14S (Cell) variant | Reference design board and accessories |
| RDDRONE-BMS772 | 3S-6S (Cell) variant | Reference design board and accessories |
For more information, visit nxp.com/mr-bms771.
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