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Re: Extending range of 24kWh Leaf with LeafBox

Posted: Mon Mar 20, 2017 9:02 am
by Piro
Stanton wrote:This is what I originally suspected, so glad to see it proved out. Unfortunately, the times I need range extension are on trips that are (mostly) highway, which reduces the value of LeafBox for me. There's no range-killer like speed for an EV ;)


Yes, you are right. If we assume 100% highway usage - then just simple physics says, that LeafBox cannot help with range.

Whole improvement comes from city driving, moderate long distance journeys, living in hilly region, or mountains.

Re: Extending range of 24kWh Leaf with LeafBox

Posted: Mon Mar 20, 2017 12:45 pm
by LeftieBiker
Since I'll be extending my lease again, I'm interested. I drive mainly secondary roads at 30-50MPH, with some highway use at 55MPH. It's moderately hilly here. Any idea how much more range I could get?

Re: Extending range of 24kWh Leaf with LeafBox

Posted: Tue Mar 21, 2017 12:06 am
by Piro
LeftieBiker wrote:Since I'll be extending my lease again, I'm interested. I drive mainly secondary roads at 30-50MPH, with some highway use at 55MPH. It's moderately hilly here. Any idea how much more range I could get?


After collecting all data from testers - it looks, that 10% or more (more city drive = better result). This also depends on drivers' skills, as huge part of range improvement comes from using "coasting/gliding" function of LeafBox.

Re: Extending range of 24kWh Leaf with LeafBox

Posted: Tue Mar 21, 2017 2:15 am
by LeftieBiker
I'm pretty good at coasting (my Vectrix motorcycle will coast), but rarely bother to shift to R/N to do it. What's the process? Are you still testing, or selling or renting it?

Re: Extending range of 24kWh Leaf with LeafBox

Posted: Tue Mar 21, 2017 5:06 am
by Piro
LeftieBiker wrote:I'm pretty good at coasting (my Vectrix motorcycle will coast), but rarely bother to shift to R/N to do it. What's the process? Are you still testing, or selling or renting it?


It is a finished product, available from http://vtechtuning.eu/leafbox.html

Let's say it is a "half-commercial" product - I use money to develop products for other EV cars.

Re: Extending range of 24kWh Leaf with LeafBox

Posted: Tue Mar 21, 2017 10:00 am
by VitaminJ
LeftieBiker wrote:I'm pretty good at coasting (my Vectrix motorcycle will coast), but rarely bother to shift to R/N to do it. What's the process? Are you still testing, or selling or renting it?

As described in the videos and the first pages of this thread; LeafBox changes D mode to "Glide" mode. In this mode the "dead zone" of the pedal is larger to allow your foot to easily rest in a position where the motor will go to 0 kw/neutral. The stock Leaf already does this but you need supreme foot control as the pedal "dead zone" is only 1-2cm. This way you can cruise in D and with just a movement of your foot instantly switch to neutral and coast at maximum efficiency and not have to deal with the shifter at all.

Re: Extending range of 24kWh Leaf with LeafBox

Posted: Wed Mar 29, 2017 12:14 am
by drees
Piro wrote:I plan do explain also a bit more about that, how it is possible to go over 80kW limit (by poor 3kW, but still better than factory power, this functionality is NOT ENABLED yet) and how it is possible to invoke higher regen (again about 3kW better regen, as it bases on the same trick - exploit of factory PID_R algorythm for power demand stabilization). Maybe this will be boring for most of you, but for some it will be interesting. For me personally this exploit is a well known trick, because I have observed it in many ECUs of gasoline cars years ago, while working at reverse engineering them (as Im car tuner, all in all). I checked that in Leaf just for fun, believing in maybe 5% of chance, that this will work - and tadaaam - it works. Also for regen. I will prepare some pictures (graphs) to explain that better.

Would love to see exactly how that works.

For me, my biggest complaint about the LEAF's regen is how the maximum amount of regen is highly limited at any speed higher than 10-15 mph. At highway speeds you often get NO regenerative braking. This gets much worse as your LEAF loses capacity.

It seems that the only way to work around this would be to actually reprogram one of the LEAFs ECUs - I don't see how a pedal position remapper would be able move these thresholds significantly unless I'm missing something.

Re: Extending range of 24kWh Leaf with LeafBox

Posted: Sat Apr 08, 2017 8:30 am
by Piro
By the way, I have built following thing for my home:

Basically it is Type1 Charger, but you can connect it to 3phase or 1 phase socket. If it is 1-phase - it is typical 10A-13A charger (normal/boost mode) so you charge 2kW or 2.4 kW (boost). But if you connect it to 3phase (400V here) it will give you 3,6 kW (normal mode) or 4,6 kW (boost mode). It uses balanced load on all phases.
I have prepared also 6,6kW version, again balancing on 3 phases (10 A per phase in that case).
It is fully portable, with power meter, load (kWh charged) meter, voltage & current display.
So people with limitation of 16A per phase or so can charge with full speed if they only have 3 phase at home.

Please tell me countries, where such thing is a good idea.
Here in Poland we have 3phase in most houses, usually limited to 14,5 A (16 A fuse). So if I charge car (10A, 2 kW or so) i cannot use anything on that phase, that uses more than 1,5 kW or fuse will switch off current.
With my solution my Outlander PHEV charges with full speed of 3.6 kW, and my Wife's Leaf - 4,5 kW (7 A per phase).
Such charger is fully portable, it can be used as 1-phase 230V charger (10A normal mode, 13 A boost mode).
My problem here was, that we have same phase in garage, and dishwasher. So when I charge car (original charger, 10A 2,2 kW) and my Wife starts dishwasher, fuse switches off. With my new charger it is no problem (load per phase for Outlander, charging with full speed of 3,6 kW is 6A, so no problem at all)

I have prepared also prototype, that uses equal 10A load on 3 phases to have 30A for 6,6 kW charging of Type1 car (like Leaf).

Is that a good idea, such semi-fast charging at home, or any place, where 3 phases are available (even with 16A limit per phase, as my charger takes 10A per phase) ?
Thomas

PS: Maybe we can start a separate thread to discuss that

Re: Extending range of 24kWh Leaf with LeafBox

Posted: Tue Apr 25, 2017 6:52 am
by 2013Leafy
I have a 2013 Leaf S that I own. do you need any more testers?

Thanks