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Re: Extra Battery, How to Integrate with 24kWh Traction Battery?

Posted: Sun Apr 01, 2018 11:05 pm
by TonyWilliams
If the additional battery cells are comparable to the original cells, and arranged in 96S, I see no reason to think that CHAdeMO will charge just fine with the original CHAdeMO setup.

I do remember a test done by Ingineer years ago where the LEAF would fault out if more than 30kW were added (I suspect it would exceed the regen limit).

Re: Extra Battery, How to Integrate with 24kWh Traction Battery?

Posted: Mon Apr 02, 2018 1:48 pm
by arnis
Leaf regen limit is 50kW.

Re: Extra Battery, How to Integrate with 24kWh Traction Battery?

Posted: Mon Apr 02, 2018 2:01 pm
by jkenny23
arnis wrote:Leaf regen limit is 50kW.
Has anyone attempted to "force" the Leaf to use more regen to behave like B mode in the newer models, or the more aggressive regen of other EVs?

Re: Extra Battery, How to Integrate with 24kWh Traction Battery?

Posted: Mon Apr 02, 2018 11:34 pm
by mux
I've read through all the threads that could pertain to this, and nobody has shown evidence of their work, just conjecture (much like with the extender battery - to my chagrin :P)

I'm going to attempt this at some point after I have successfully hacked into the EV CAN to modify reported GIDs to reflect the charge in my extender+main battery accurately. As far as I know, this can be achieved by spoofing requested torque messages from the VCM.

Re: Extra Battery, How to Integrate with 24kWh Traction Battery?

Posted: Tue Apr 03, 2018 8:49 pm
by IssacZachary
I know this has been measured, estimated and posted on MNL but keep searching and searching, even at google.com with "site:mynissanleaf.com" and I'm still not finding this.

Does anyone know how many 18650's would fit in an emptied Leaf Battery case?

Re: Extra Battery, How to Integrate with 24kWh Traction Battery?

Posted: Tue Apr 03, 2018 9:01 pm
by LeftieBiker
This topic may yield either that info or at least the dimensions to determine it yourself:

https://endless-sphere.com/forums/viewtopic.php?t=89680

Re: Extra Battery, How to Integrate with 24kWh Traction Battery?

Posted: Tue Apr 03, 2018 9:06 pm
by IssacZachary
LeftieBiker wrote:This topic may yield either that info or at least the dimensions to determine it yourself:

https://endless-sphere.com/forums/viewtopic.php?t=89680
Thanks! That's a big help!

Re: Extra Battery, How to Integrate with 24kWh Traction Battery?

Posted: Tue Apr 03, 2018 10:01 pm
by LeftieBiker
Remember that it doesn't always help to specify a site when searching Google. There are other sites like the above that can be very helpful.

Re: Extra Battery, How to Integrate with 24kWh Traction Battery?

Posted: Tue Apr 03, 2018 10:53 pm
by mux
IssacZachary wrote:I know this has been measured, estimated and posted on MNL but keep searching and searching, even at google.com with "site:mynissanleaf.com" and I'm still not finding this.

Does anyone know how many 18650's would fit in an emptied Leaf Battery case?
On a pure volume of the original cells-basis: The modules are 303x223x35mm, and there are 48 of these, so that's a total volume of 0.114m3 which would fit about 6000 18650s in a staggered pattern. Most likely you'd arrange them 60P, so it'd be 5760 cells for a maximum nominal capacity with modern cells of approx. 72kWh, but more likely around 55 if you include cell spacers, bus bars and all that jazz.

Re: Extra Battery, How to Integrate with 24kWh Traction Battery?

Posted: Wed Apr 04, 2018 4:50 pm
by jkenny23
Question for mux - since I'm thinking of getting a head start with wiring tap from the VCM to the trunk, I was going to wire both the 3 contactor controls (PRE-CHARGE RELAY, SYSTEM MAIN RELAY 1, SYSTEM MAIN RELAY 2) as well as the 2 CAN bus lines in case I need to do any CAN bus reads or modification in the future. Will it be an issue having the extra 8' long stub of wire going to the trunk on the CAN bus?