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
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
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 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