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Blog - Battery Monitoring
RT-BMS CAN Bus definition
RT-BMS CAN Bus definition
Following datagrams are sent by the RT-BMS master over the CAN bus at speed of 250 kb/s. The CAN module uses the version 2.0 of the protocol.
Address : 0x14A10101
D0 : Battery pack total capacity (0 .. 100 %)
D1 : Current (-127 … +126, value * 5 = current [A])
D2 : Total voltage (low byte)
D3 : Total voltage (high byte) - range 0 … 65535, value / 10 = voltage [V]
D4 : Highest temperature on the cells (-127 … +126 deg. C.)
D5 : Bit 0 - reading, Bit 1 - waiting, Bit 2 - balanicing , Bit 3 - running, Bit 4 - low voltage, Bit 5 - error (not serious), Bit 6 - error (serious)
D6 : The address of the CBU causing last error.
D7 : Internal error code (only for service purposes)
Address : 0x14A10102
D0 : Lowest voltage of the cell (low byte)
D1 : Lowest voltage of the cell (high byte) - range 0-65535, value / 100 = voltage [V]
D2 : The address of the cell with the lowest voltage
D3 : Highest voltage of the cell (low byte)
D4 : Highest voltage of the cell (high byte) - range 0-65535, value / 100 = voltage [V]
D5 : The address of the cell with the highest voltage
D6 : Lowest temperature on the cells (-127 … +126 deg. C.)
D7 : Reserved
This is the version of the CAN protocol available at the 192 cell version of the RT_BMS Master unit.
