8-16s-bms-powersafe

Description technique du iBMS 8-16s

Cells management

  • Management of 8 to 16 lithium cells in series*, compatible with all cell technologies (NMC, LiFe, LiPo…)Management of 6 NTC temperature sensors:
    • 3 digital measurements used by the software
    • 3 analog measurements used by the hardware redundancy
  • Measurements accuracy:
    • Cell voltages: +/- 5 mV
    • Temperatures: +/- 1°C

Protections

  • 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 charge tunable by software
  • Short circuit hardware protection (resettable electronic fuse)

Balancing

  • Passive balancing with a 500 mA bypass current per cell (with an external bypass board)

Power box

  • Requires an external power box (contactors, hall effect current sensor)
  • Bidirectional measurement of the battery current by an external hall effect sensor
  • Charge and discharge management
  • External power box management up to 750 A:
    • Management of an external electromechanical contactor
    • Precharge circuit (included on the board)

Smart functions

  • SOC and SOH estimation
  • Advanced self-diagnostic of the board
  • Communication by CAN bus 2.0B (can be opto-isolated)
  • Possibility to manage a motor controller and a charger
  • Advanced supervision software
  • Black box integrated with defaults history storage and life counters
  • Possibility to connect up to 10 packs in parallel
  • Hot swap capability

Power supply/consumption

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

Mechanical format

  • 90 mm x 172 mm x 12 mm
  • Can be potted to be used in harsh environment

* Factory setting