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Wireless Battery Management System

Renesas' automotive wireless battery management system (BMS) offers material cost reduction and increased design flexibility, enabling more efficient scaling of electric vehicle fleets which are more competitive than traditional combustion-engine fleets.

System Benefits

  • Eliminates the traditional BMS wired harness, saving the wiring and volume for design flexibility in the battery pack and improving manufacturability without compromising range and accuracy over battery life.
  • SmartBond TINY™, the world’s smallest and lowest power Bluetooth® Low Energy (LE) 5.1 system-on-chip (SoC), reduces the cost of adding Bluetooth LE in an automotive system.
  • Multi-cell/Bluetooth LE with the ISL78714 automotive-grade Li-ion battery manager IC for a more cost-effective solution or 1-cell/Bluetooth LE with a Bluetooth LE MCU module for a flexible cell attachment/detachment concept.
  • Supports functional safety with RH850 microcontroller (MCU) and battery management IC (BMIC) devices.
  • System-level validation with a Bluetooth LE module is under development by Renesas.
Wireless Battery Management SystemRenesas Dialog Diagram Legend
Bluetooth LE      
DA14531 (Industrial Grade) The Bluetooth® low energy solution that will power the next 1 billion IoT devices through ease of use* Bluetooth low energy devices are pending AEC-Q100 qualification Datasheet Buy/Sample


ISL78714 Automotive Grade Multi-Cell Li-Ion Battery Manager Datasheet Buy/Sample


Buck Regulator      
RAA271050 4A, High Efficiency Synchronous Buck Regulator for Automotive Applications Datasheet Contact Sales
RAA270005 Power Management IC (PMIC) for Automotive RH850 MCUs Datasheet Contact Sales


Linear Regulator      
ISL78307 40V, Low Quiescent Current, 50mA Linear Regulator for Automotive Applications Datasheet Buy/Sample


RH850/P1M High-end Automotive Microcomputers for Chassis System (32bit MCU, ASIL D) Select Document Contact Sales