Smart Battery Management for Mobile Robotics

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The RDDRONE-BMS772 is a standalone BMS reference design suitable for mobile robotics such as drones and rovers, supporting 3 to 6 cell batteries.

  • Also 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.
  • Higher voltage cell count applications can rework this reference to daisy chain BCC chips.
  • An S32K144 General Purpose MCU provides great flexibility and communication to a PX4 based FMU via UAVCAN or I²C/SMBus.

Block Diagram

RDDRONE-BMS772 Block Diagram

RDDRONE-BMS772 Block Diagram
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Supported Devices

RFID

Connected NFC Tags

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

Processors and Microcontrollers

S32K Auto General-Purpose MCUs

  • S32K1: S32K1 Microcontrollers for Automotive General Purpose

Power Management

System Basis Chips

  • UJA1169TK: Mini High-Speed CAN System Basis Chip

Battery Cell Controllers

  • MC33772B: 6-Channel Li-Ion Battery Cell Controller IC

Features

Flexibility

  • Supports 3-6 cell batteries, with stack voltage ranging from 6 V to 26 V

Measurements

  • Performs accurate battery stack and cell voltage measurements as well as accurate battery charge or discharge current measurements, up to 90 A DC

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

CAN

  • Two CAN connectors are available on the board. The board is also compatible with UAVCAN to work with PX4 flight controllers

I²C

  • An I²C interface is implemented on the board and can also be used as an SMBus
  • An external OLED display connected via I²C is provided with RDDRONE-BMS772 kit from rev. 4.0.

NTAG 5 boost

  • The new NTAG 5 boost is embedded on the RDDRONE-BMS772 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 install an additional coil as a replacement for the PCB antenna

A1007

  • The brand new A1007 Secure Authenticator allows you to build a secure anti-tamper system using elliptic curve cryptography
  • Secure flags and counters can be used for cycle counts and under-voltage over temperature permanent flagging

SWD and JTAG

  • Both SWD and JTAG debugging interfaces are available on the RDDRONE-BMS772 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

S32K144

  • Automotive grade (AEC-Q100 qualified), 32-bit Arm® Cortex®-M4F-based MC
  • 512 KB Flash, 64 K SRAM, 80 MHz @ RUN mode (112 MHz @ HSRUN mode), -40 °C to +105 °C / +125 °C, 48/64/100 LQFP, 100 MAPBG
  • ISO CAN FD, CSEc hardware security, ASIL B ISO26262 functional safety, ultra-low power performanc

Buy Options

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  • RDDRONE-BMS772
    Active

  • Smart Battery Management for Mobile Robotics.

  • Kit contains:

    • Assembled and tested RDDRONE-BMS772 board
    • Unmounted cell balancing connectors for 3, 4 and 6 cell configurations
    • CAN Bus Termination Resistor (DRONE-CAN-TERM)
    • 4-pin JST-GH to 4-pin JST-GH 300 mm cable
    • Power input and power output connectors
    • External thermistor with cable
    • Small OLED display (soldered to the RDDRONE-BMS772 board)
    • Quick start guide
  • $114.54 USD
  • For a quantity of 1
    • Availability: In Stock
    • Inventory: 4
    • Shipping: Normally ships 1-2 business days
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