Technical description

High Voltage BMS Solution

Cells management

  • Master/Slave architecture
  • Possibility to connect in series several HVS in order to manage a battery pack with a voltage up to 1000 Volts
  • Management of 12 lithium cells in series* per HVS compatible with all cell technologies (NMC, LiFe, LiPo,…), +/- 5 mV of accuracy.
  • Management of 5 NTC temperature sensors
    • 3 digital measures used by the software
    • 2 analogic measures used by the hardware redundancy


  • Hardware redundancy for voltage and temperature measurements in order to reach a high level of safety (SIL2 of EN61508 standard)
  • Overcharge and undercharge, tunable by software
  • Overtemperature and undertemperature, tunable by software
  • Overcurrent: 2 levels in discharge, 1 level in discharge tunable by software


  • Passive balancing with a 150 mA bypass current per cell (on the BMS)

Power box

  • Bidirectional measurement of the battery current with a hall effect sensor
  • Charge and discharge management
  • Power box management up to 750 A:
    • Command of an external electromechanical contactor
    • Possibility to control one additionnal contactor

Smart functions

  • SOC and SOH calculation
  • Advanced self-diagnostic of the board
  • Communication by CAN bus 2.0B (opto-isolated)**
    • Motor controller management by CAN bus
    • Charger management by CAN bus
  • HVM is configurable using the CCP protocol
  • Insulation measurement

Power supply/consumption

  • Supply of the BMS directly on the battery pack
  • Low consumption in standby mode: < 500 µA

Mechanical format

  • HVS (High Voltage Slave board) : 160 mm x 94 mm x 14 mm
  • HVM (High Voltage Master board) : 166 mm x 150 mm x 37 mm
  • HVI (High Voltage Isolation board): 145 mm x 65 mm x 48 mm
  • Can be potted to be used in harsh environment

* Also exists in 25S