far driver controller and MXUS motor

Faster throttle response means probably higher peak battery currents.

With a battery consisting of 3 different packs and 3 bms , how can you tell which ones does cuts first? If the first ones has shut off, the others will immediately follow.
I would set max battery current to 150-200A, 300A or more seems way to be to much for your setup.
If you have to lower your low voltage cut off to get more battery current, your voltage sag is to high.
 
dominik h said:
Faster throttle response means probably higher peak battery currents.

With a battery consisting of 3 different packs and 3 bms , how can you tell which ones does cuts first? If the first ones has shut off, the others will immediately follow.
I would set max battery current to 150-200A, 300A or more seems way to be to much for your setup.
If you have to lower your low voltage cut off to get more battery current, your voltage sag is to high.
Click to expand...
Ok. But on the older nd72680, I already tried to set 200bat, 300phase current. And it didn't help much. Still the same behavior.

Also, on the old controller I tried to turn off flux weakening (set to None). And that improved the situation a lot, the disconnections become super rare.
 
If you turn off flux weakening, you will lower max current near and at topspeed.
During acceleration you only have short burst with high current, but near topspeed you have longer periods with full battery current.

Lower battery current, maybe to 175A and try again.
What max phase current have you set now?
300A sounds low for an 890A controller.
 
Ok. It seems that I partially found the solution. In the simple settings screen, there's parameter regarding low voltage handling. And by default it's set to "2Vol" or something. I tried different values and soc10% seems the most appropriate. In that mode, the controller turns off rarely and the most important, when it turns off, the regenerative braking is still possible,so I don't loose my main brake. That's great. With that I can ride:)

At some moment during the experiments, I even got the situation when after controller turns off the throttle, I have both regen AND small level of throttle remaining, like instead of 15kW I could use 2-4kW throttle. But I couldn't repeat that setting. I remember I set that parameter to "Other", but when tried to repeat, I cannot use throttle after disconnections.
 
With the 2V setting my controller reduces output power from 2V above the set total battery shut off limit.
It reduces power from 30kw down to 1kw, the more I reach to the shut off voltage.
 
dominik h said:
With the 2V setting my controller reduces output power from 2V above the set total battery shut off limit.
It reduces power from 30kw down to 1kw, the more I reach to the shut off voltage.
Click to expand...
So basically Vol4 will start lowering when its 4volts above the threshold?

And what is SOC10%, SOP and Other?
 
The controller can also react to the SOC sent from the BMS.
But don't ask me how. Maybe over one lin or Can-Bus.
It is done in the Tinbot/Koltor RS1, there the BMS reduces the max line current when the SOC gets to low.

The Rest I do not know.
 
dominik h said:
The controller can also react to the SOC sent from the BMS.
But don't ask me how. Maybe over one lin or Can-Bus.
It is done in the Tinbot/Koltor RS1, there the BMS reduces the max line current when the SOC gets to low.

The Rest I do not know.
Click to expand...
Oh. That's strange. My bms (neither of them) isn't connected to the controller. But setting SOC10% solves the problem at least for 72890+qs273 setup.
 
Probably it uses the settings from
"Full batt"and "low batt" in the app to estimate the SOC.
These settings change the SOC meter in the app.
I have no tinbot/Koltor RS1 to see how it is done there, I only have seen pictured the different max line currents at different SOC levels.
 
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