01 / BMS FUNDAMENTALS
A Battery Management System (BMS) monitors and manages battery-pack operation. Depending on its architecture, it can support electrical protection, battery-state estimation, cell balancing and communication with external equipment. The exact functions depend on the selected design.
Voltage, current and temperature limits
Voltage, current, temperature and SOC where supported
Cell voltage management where equipped
Battery data exchange via supported interfaces
01
Smart designs may estimate state of charge (SOC) and state of health (SOH) using available measurements and calculation algorithms.
02
Depending on the design, the BMS monitors operating limits and records or reports supported fault conditions.
03
Multi-cell packs may use passive or active balancing to manage differences between cell voltages when balancing circuitry is included.
04
Data logging, configurable parameters, firmware updates and other features depend on the selected BMS hardware and software.
A communication-enabled BMS exchanges supported battery information with compatible external systems. Successful integration requires agreement on the physical interface, message format, data units and system behavior.
CAN, UART and other supported interfaces
Voltage, current, temperature and status where available
Supported configuration and control functions
Compatibility with the host system
03 / COMMUNICATION PROTOCOLS
Different interfaces serve different purposes. Select based on device compatibility, wiring, communication requirements and the protocol supported by the host system.
| Interface | Key Features | Typical Applications | Integration Considerations |
|---|---|---|---|
| CAN / CAN FD | Robust bus communication, arbitration and error detection. | Compatible flight controllers and control systems. | Confirm bus topology, termination, transceivers and message definitions. |
| UART | Simple point-to-point serial communication. | Configuration, debugging and supported serial data links. | Confirm TX/RX, logic voltage, baud rate and message format. |
| I²C / SPI | Short-distance communication between electronic components. | Board-level connections between chips and controllers. | Check signal timing, wiring and electrical compatibility. |
| RS485 / RS232 | Serial communication options for compatible equipment. | Industrial monitoring, configuration or supported control systems. | Confirm electrical levels, network design and higher-level protocol. |
| SMBus | System-management communication for compatible smart batteries. | Host systems designed to support the relevant smart-battery interface. | Confirm command set, version and host implementation. |
Note: CAN, UART, I²C, SPI, RS485 and RS232 describe interfaces or communication mechanisms. The data protocol must also be compatible between the BMS and the connected device.
04 / SYSTEM INTEGRATION
The BMS and flight controller must share a compatible interface and message protocol. Integration testing should verify the data received and the system’s response to warnings and communication faults.
Technical note: BMS features, communication compatibility, protection thresholds and performance vary by product design. Verify product-specific functions and system compatibility against the relevant documentation and validation results.
Tell us about your UAV application, BMS requirements, and communication needs. Our engineering team will help you identify the right battery management and integration solution.
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