Smart Battery Management for Mobile Robotics 7-14 Cells

MR-BMS771

Roll over image to zoom in

The MR-BMS771 is a standalone BMS reference design suitable for mobile robotics, such as drones and rovers, supporting 7 to 14 cell batteries.

The design is suitable for other applications, such as portable medical devices, high-energy power tools and personal mobility (wheelchairs/scooters), all of which benefit from from high-quality battery control.

The MR-BMS771 features a 7 to 14 cell voltage measurement, pack voltage measurement and output voltage measurement, as well as current sensing (coulomb counting), 1 to 3 possible cell temperature sensors, and power switch. Other features include 2 CAN buses, I²C, display, NFC, UART 12 V 1 A output, and secure element.

The S32K146 MCU allows for complete software flexibility and communication via CAN/UAVCAN or I²C/SMBus.

Easily make your own control algorithms with Model Based Design Toolbox (MBDT) in MATLAB SimuLink.

Block Diagram

MR-BMS771

MR-BMS771 Block Diagram
Get diagram PDF

Supported Devices

Processors and Microcontrollers

S32K Auto General-Purpose MCUs

  • S32K1: S32K1 Microcontrollers for Automotive General Purpose

Battery Management

Battery Cell Controllers

  • MC33771C: 14-Channel Li-Ion Battery Cell Controller IC

Security and Authentication

Authentication

  • SE051: EdgeLock® SE051: Proven, Easy-to-Use IoT Security Solution with Support for Updatability and Custom Applets

RFID

Connected NFC Tags

  • NTAG5-BOOST: NTAG® 5 Boost: NFC Forum-Compliant I²C Bridge for Tiny Devices

Interfaces

CAN Signal Improvement

  • TJA1463: CAN Signal Improvement Capability Transceiver with Sleep Mode

Features

Flexibility

  • MCU-based solution with 7 to 14 cell batteries, with stack voltage ranging from 15 V to 59 V

External 12 V

  • 12 V 1 A output with Over Current Protection (OCP)

Battery Self-Management

  • Performs accurate battery stack and cell voltage measurements as well as accurate battery charge or discharge current measurements, up to 30 A DC tested

Cell Balancing

  • Operates cell balancing during charging

Low Power Modes

  • Offers a deep sleep mode (for transportation and storage) with very low leakage current, as well as an automatic sleep mode with low current consumption on the battery

Safety

  • Allows diagnostics to verify the safe operation of the battery

Diverse Connection Types

  • Two CAN buses are available on the board. Of which 1 CAN Signal Improvement Capability (SIC) up to 8 Mbit/s
  • An I²C interface is implemented on the board and can also be used as a SMBus
  • An external OLED display connected via I²C is provided with the MR-BMS771 kit

NTAG 5 Boost

  • The NTAG 5 boost is optional on the MR-BMS771 board. It also allows the user to acquire data and configure the board through NFC

PCB Antenna

  • An NFC antenna is built on the PCB. It allows short-range NFC communication with a smartphone

External Antenna

  • For extended-range NFC communication, it is possible to connect an NFC antenna as a replacement for the PCB antenna

Secure Element

  • The integrated secure element EdgeLock® SE051C delivers proven security certified to CC EAL 6+, with AVA_VAN.5 up to the OS level, for strong protection against the most recent attack scenarios

SWD and JTAG

  • Both SWD and JTAG debugging interfaces are available on the MR-BMS771 design. They work with standard J-Link as well as other debuggers

DCD-LZ

  • DCD-LZ is a combined debug console interface for use with PX4 DroneCode and HoverGames platforms

S32K146

  • Automotive grade (AEC-Q100 qualified), 32-bit Arm® Cortex®-M4F-based MC
  • 1 MB Flash, 128 K SRAM, 80 MHz @ RUN mode (112 MHz @ HSRUN mode), -40 °C to +105 °C/+125 °C, 64/100/144 LQFP, 100 MAPBGA
  • ISO CAN FD, CSEc hardware security, ASIL B ISO26262 functional safety, ultra-low power performance

Buy Options

MR-BMS771-Image

Click to expand

MR-BMS771
Active

Smart Battery Management for Mobile Robotics 7-14 Cells.

    $223.25 USD
    In Stock :10

    Normally ships 1-2 business days

    ADD TO CART
    Order from distributors

    Documentation

    Quick reference to our documentation types

    Filters

    3 documents

    Compact List

    Design Resources

    Select a section:

    Related Hardware

    Quick reference to our board types.
    Filters

    2 hardware offerings

    Design Files

    Quick reference to our design files types.
    Filters

    2 design files

    Software

    Quick reference to our software types.

    Filters

    3 software files

    • Application Example Software

      NuttX RTOS C-Based BMS example for RDDRONE-BMS772

      GITHUBRev 6.1May 5, 2025 13:15:00NUTTX-RTOS-C-BASED-BMS-FOR-RDDRONE-BMS772
      Download
    • Application Example Software

      NuttX RTOS C-Based BMS example for MR-BMS771

      GITHUBRev 7.2Jun 30, 2025 12:57:00NUTTX-RTOS C-BASED
      Download
    • Application Example Software

      MBDT Toolbox S32K1xx 4.3.3 Patch

      GITHUBRev 4.3May 5, 2025 12:32:00MBDT-TOOLBOX-S32K1XX-4.3.3-PATCH
      Download

    Note: For better experience, software downloads are recommended on desktop.

    Training

    Filters

    2 trainings

    Support

    What do you need help with?

    • Narrow your search
    Search