8-16s-bms-powersafe

Description technique

Cells management

  • Possibility to connect in series several BMS in order to manage a battery pack with a voltage up to 1000 Volts
  • Management of 8 to 18 lithium cells in series* compatible with all cell technologies (NMC, LiFe, LiPo,…), +/- 5 mV of accuracy.
  • Management of 6 NTC temperature sensors
    • 3 digital measures used by the software
    • 3 analogic measures used by the hardware redundancy

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

Balancing

  • 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
    • Command of a precharge circuit (included on the board)
    • Possibility to control two additionnal contactors

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
  • Advanced supervision software

Power supply/consumption

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

Mechanical format

  • 100 mm x 180 mm x 12 mm
  • Can be potted to be used in harsh environment

* Factory setting
** Requires an external 12 V power supply

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