19-30S BMS PowerSafe

Energy Storage

bms-powersfe energy storage

Automotive

bms-powersfe automotive

Technical description

Cells management

  • Management of 19 to 30 lithium cells in series* compatible with all cell technologies (NMC, LiFe, LiPo,…),
  • Management of up to 15 NTC temperature sensors:
    • 10 digital measurements used by the software
    • 5 analogue 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 (equivalent to 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
    Requires contactors and hall effect current sensor
  • Charge and discharge management
  • Power box management up to 750 A:
    • Command of up to 4 external 12V electromechanical 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
  • 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 several packs in parallel using an external EMS (small additional board)

Power supply/consumption

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

Mechanical format

  • Actual format: 270 mm x 125 mm x 12 mm (possible in 210 mm x 125 mm x 12 mm)

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