Description technique du BMS 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 2 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
- BMS: 90 mm x 172 mm x 12 mm
- Bypass (500 mA): 65mm x 170mm x 12mm
- Can be potted to be used in harsh environment
* Factory setting