Nissan Leaf Stack not getting revs underload

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vitecd
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Re: Nissan Leaf Stack not getting revs underload

Post by vitecd »

larsrengersen wrote: Mon Jul 14, 2025 12:05 pmSmoothly
It is just my feeling, the car didn't shake

My problems with Verter are : the car shakes, and not getting revs. The original assembly is just for reference, to be clear whether it is software or hardware. If the same setup is going smoothly with Leaf SW, then it is Verter SW or the settings.
Referring to the last logs, Verter is actually getting 6800 revs, but wobbling.
My current question, why Verter can drop the torque request? Why is it not linear?
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larsrengersen
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Re: Nissan Leaf Stack not getting revs underload

Post by larsrengersen »

Likely because the Zombiverter is better at trying to protect your cells.
In the Leaf demo you are seeing a serious undervoltage error of 2,7V.
IMG_6458.jpeg

Since the lowest voltage before load was around 3,6V this indicates the pack is really shitty. Allowing the cells to go down that low molests your pack even more.
My suggestion would be: stop abusing this pack before things go wrong and get a better one.
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tom91
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Re: Nissan Leaf Stack not getting revs underload

Post by tom91 »

vitecd wrote: Tue Jul 15, 2025 1:52 amthe settings
Zombie is designed to work with 100s if not 1000s of combinations so it needs tuning for every setup.
vitecd wrote: Tue Jul 15, 2025 1:52 am why Verter can drop the torque request
UDCmin is being approached so it drops the torque requests. The fact the battery caves so hard and goes widely out of of balance on the cells means the pack is done for and not suited for your application. I am suprised the "leaf hardware" accepts this shitty of a battery.
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vitecd
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Re: Nissan Leaf Stack not getting revs underload

Post by vitecd »

tom91 wrote: Tue Jul 15, 2025 7:39 am it drops the torque requests
Well, but why is it not limiting? I mean, after drops, it rises immediately, and fluctuates up and down continuously.
I've charged the Leaf and am going to explore some ideas. The battery is just for "bench" testing; I've another one on the shelf in cells that I can put together after I understand what to do in general.

Can anyone advise me on the base setting and something to play with, please?

-- // --

One more question (two)
Does "CAN mapping" works from the WEB interface? I've tried to push throttle position to the CAN to be able to log it, but in my case I can't set the "Parameter" for the mapping, the list is empty.
The other question is : does the "potnom" showing the pot's position? In my case it is always 0.
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Re: Nissan Leaf Stack not getting revs underload

Post by Jacobsmess »

Potnom should change with the pedal position.
Throttle might be excluded from the can mapping on the OI board. I seem to remember there being a discussion about it on here for safety reasons, however this might be incorrect.
Why not swap the good cells for the weak ones you have and see if it addresses the issues that Tom91 and others are trying to help you and advising with?
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Re: Nissan Leaf Stack not getting revs underload

Post by vitecd »

Jacobsmess wrote: Wed Jul 16, 2025 6:16 am Why not swap the good cells for the weak ones
Because it is Nissan Leaf battery, 400kg box under the car, sealed and contain 96 cells inside. I can not see yet, what I'm limited to the battery voltage only. Originally I've started with another setup (boat) and there are no significant voltage drops. My current setup (Nissan Leaf) having the same problem and I wish to recognize it.
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