BMS support

OPHION application supports multiple Battery Management Systems (BMS). The BMS should monitor battery state and enable dynamic current limitation in error conditions via the controller. This prevents dangerous situations where BMS power cutoff during operation could occur - the controller can gradually limit power before a BMS-initiated cutoff.

tip

Contact us if you need support for additional BMS types.

warning

Dynamic DC-side current limitation requires non-zero values for /driver/limiter/ibpos and /driver/limiter/ibneg.

Preparation

All BMS connections use CAN bus. Ensure matching CAN speeds between BMS and controller, and proper CAN termination.

tip

Controllers use 1 Mbps CAN speed by default. To modify controller CAN speed, refer to: msgconf

Common BMS Settings

These settings apply to all BMS types.

/bms/bmstype

Select your BMS type using this parameter:

Value	Description
0	No BMS
1	siliXcon BMS (all variants)
10	Fish BMS
30	Akuenergy BMS [Available on request]

/bms/bmsopts

Only applicable when bmstype is non-zero.

Value:or click on a row to toggle.

Bit	Description
0	BMS required for motor operation. Controller stops if BMS not present on CAN.
1	Stop vehicle after BMS disconnection. (Allows initial operation without BMS, but requires BMS once connected) Requires bit 0.
2	Disable BMS limitations. BMS can be required for vehicle operation, but its limitations won't be enforced

siliXcon BMS

bmsopts = 1

SiliXcon BMS transmits all required information automatically without additional configuration.