Rozhkov BMS - Voltage Error; Not Charging

Hi Guys,

I was testing the limit of the battery, and it stops, when one cell drops do 2.9v, now I can't charge the car, it gives Me VOLTAGE ERROR in the bms? Someone can please help, how can I put on charger?

Thanks,

Please post a screenshot of the current cell voltages.

Snorre schrieb: Please post a screenshot of the current cell voltages.

The difference from b7 (3,02V) to b14 (3,37V) is too big.
For that reason the VOLTAGE ERROR is generated.
I don't own a Rozhkov bms.
May it is possible to change a setting, so that the error won't be generated.
Otherwise you need to unmount the battery and charge the cells manually until the cell deviation is less than 0,2V.
When this is done, the Twizy charger will start again.


Btw:

FiwiPITO schrieb: I define the limits of the Battery to 4.05v and 3.05v;

Setting the upper limit to 4,15 - 4,2V and the lower limit to 3,2 - 3,3V imo would be a much better choice.

You can change the "cell error voltage diff" in the BMS... but... I would be really careful

And you should wacht this cell very close, a big diff like this looks bad to me



From
https://www.twizy-forum.de/bms/92075-rozhkov-bms-faq-schemes-i

arg-was-weiss-denn-ich schrieb: You can change the "cell error voltage diff" in the BMS... but... I would be really careful

And you should wacht this cell very close, a big diff like this looks bad to me

From
https://www.twizy-forum.de/bms/92075-rozhkov-bms-faq-schemes-i

I wasn't espected so much difference in 3.3v.

Eine so große Zellspannungsdifferenz hat ursachen!
Entweder eine schlechte Zelle oder falsch angebrachte Messkabel.
Welche Zelle haut denn so stark ab?

Was B7, that dropped to 2.9v

Jack-Lee schrieb: Eine so große Zellspannungsdifferenz hat ursachen!
Entweder eine schlechte Zelle oder falsch angebrachte Messkabel.
Welche Zelle haut denn so stark ab?

Ich habe seine Daten mal in ein Diagramm gepackt.
Das sieht nicht schön aus!