Gobel RN150 - Victron: Cell Voltage does not match

[lucca371]

Hello,
i own 2 GP-SR1-RN150 connected to Victron Cerbo over CAN. The System is working fine.
But the cell voltage displayed on the battery and in cerbo do not match.
Example (@50% SOC):
BMS monitor -- Cerbo BSLBATT details Lowest cell voltage
Cell10: 3390mV -- 01::10 3.364V --> Δ 0,026V
BMS monitor -- Cerbo BSLBATT details Highest cell voltage
Cell16: 3422mV -- 01::16 3.439V --> Δ 0,017V

SW Ver: JLD-BMS-S16A150-4P4L-V0.00.05_2

Even at 100% SOC, the values do not match. As a result, the statistics in the VRM are incorrect.

Best regards.

[fancyui]

I will check about this.

[lucca371]

OK. Thank you.
Does it make sense to update to the new V1.06-01-H-20231212 firmware? I am still using the first one JLD-BMS-S16A150-4P4L-V0.00.05_2 firmware (Not available in the gobel download area)? I am a little surprised about my V0. ... version.

[fancyui]

OK. Thank you.
Does it make sense to update to the new V1.06-01-H-20231212 firmware? I am still using the first one JLD-BMS-S16A150-4P4L-V0.00.05_2 firmware (Not available in the gobel download area)? I am a little surprised about my V0. ... version.

https://drive.google.com/file/d/1O_Plx_ ... sp=sharing

Please try this firmware, V1.06

[lucca371]

Hi again.
Update to V1.06-01-H-20231212 is done. The voltage between Cerbo BSLBATT details lowest/highest cell voltage and RN_BMS_Tools software match.
But the battery BMS display showes different cell voltage only on lowest/highest cells. It seems like the values of the other cells match.

I have another question:
At 5C battery temperature, the possible charging current fell to approx. 20A (@ 2 RN150 parallel), even though the SOC was only at 50%. Is that normal at this temperature (old firmware)? At 10C the Victron Multi 5k reaches 64A to the pack.

Many thanks for your support.

[fancyui]

Hi again.
Update to V1.06-01-H-20231212 is done. The voltage between Cerbo BSLBATT details lowest/highest cell voltage and RN_BMS_Tools software match.
But the battery BMS display showes different cell voltage only on lowest/highest cells. It seems like the values of the other cells match.

I have another question:
At 5C battery temperature, the possible charging current fell to approx. 20A (@ 2 RN150 parallel), even though the SOC was only at 50%. Is that normal at this temperature (old firmware)? At 10C the Victron Multi 5k reaches 64A to the pack.

Many thanks for your support.

Yes, it is normal, RN150 BMS will request different charge current according to temperature and SOC.

C = max charge current value

Temperature:
15 ceicus +: 1C
10-15 ceicus: 0.6C
5-10 ceicus: 0.4C
0-5 ceicus: 0.2C

SOC:
Below 80%: 1C
80%-95%: 0.7C
95%+: 0.4C