mux
Posts: 170
Joined: Sat Jan 13, 2018 3:52 am
Delivery Date: 13 Oct 2011
Leaf Number: 6177

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

Mon Aug 13, 2018 10:38 am

Noal wrote:
mux wrote:It really depends on where you draw the line. Want to keep the battery in tip-top shape? Blanket, PTC heater, pretty high temperatures. Want to just barely scrape by? Probably keep it insulated or in a garage at more than the rated minimum temperature (which is -25C in this case).


My understanding was that 18650 are rated for discharge at -25C.
But how can we change our batteries at -25C? Or -17C?
Or we must keep range extender battery always above 0C (in case car starts charging)


This is really dependent on the chemistry, and the only way to know for sure is to consult the datasheets or ask an applications engineer. Samsung SDI and Panasonic have very friendly FAEs if you e-mail their battery divisions.

As a general rule, you don' t want to charge the battery under 0C. It will charge, but it will be relatively inefficient and certainly much slower than at above-freezing. For most car-sized batteries, it is actually more efficient to simply pre-heat the battery to about 10C and charge from there; there is not that much thermal mass in the cells and the efficiency easily compensates the losses in heating.

bbhangoo
Posts: 2
Joined: Fri Sep 14, 2018 10:17 am
Delivery Date: 14 Sep 2011
Leaf Number: 003391

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

Fri Sep 14, 2018 11:32 am

So as of now is there a 3rd party product or DIY recipe to extend the range on a 2011 leaf? I am down to around 40 mile range with 7/12 bars. Do not really want to spend the over $8k for a new 24k battery at the dealership. Would be willing to spend $3-4k for another 30-40 mile range. I am pretty good with tech and can put something together myself if there is a working design people have successfully used.

I had emailed Hybrid Industries, since they advertise a $4500 solution but they never replied to me. Anyone used them?

I am in the Bay Area close to San Francisco.
Any suggestions.

jkenny23
Posts: 84
Joined: Sat Aug 19, 2017 12:49 pm
Delivery Date: 19 Sep 2017
Leaf Number: 009318

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

Fri Sep 14, 2018 11:37 am

bbhangoo wrote:So as of now is there a 3rd party product or DIY recipe to extend the range on a 2011 leaf? I am down to around 40 mile range with 7/12 bars. Do not really want to spend the over $8k for a new 24k battery at the dealership. Would be willing to spend $3-4k for another 30-40 mile range. I am pretty good with tech and can put something together myself if there is a working design people have successfully used.

I had emailed Hybrid Industries, since they advertise a $4500 solution but they never replied to me. Anyone used them?

I am in the Bay Area close to San Francisco.
Any suggestions.


I would steer clear of Hybrid Industries; heard some negative reports of scams or sloppy workmanship from them.

From this article it sounds like Nissan have begun rolling out their new pricing ($2850) for a refurbushed pack (as opposed to new replacement at $6500), I would contact your dealer to see if this is an option: https://www.greencarreports.com/news/11 ... tery-packs

Otherwise there is no commercially available solution, but users like Cor here have had success buying salvage Leaf packs and installing them into cars (I had mine done for $3500 including labor, I went from a very sad 5-bar, yes 5-bars not 5-bar loss, battery to an almost new ~90% capacity pack on my 2011). Otherwise Mux is still working out the details on an external range extender pack to fit in your trunk, but it'll be a while before that makes it here to the US I think.

mux
Posts: 170
Joined: Sat Jan 13, 2018 3:52 am
Delivery Date: 13 Oct 2011
Leaf Number: 6177

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

Fri Sep 14, 2018 12:02 pm

Yeah, I'm busy starting up my company Muxsan to build trunk extender packs for the Leaf, but for the time being that's a Europe-only thing. There are people on my preorder list from the US and other non-European country, but for the time being (at least half a year) I will not have a way to service these clients. I hope to be able to offer a DIY pack or, worst case, pool some people together and fly over for a conversion party, but absolutely no concrete plans for that yet. So although I'd love to help and I guess I have the technical solution to your problem, geography prohibits supply and demand coming together here.

bbhangoo
Posts: 2
Joined: Fri Sep 14, 2018 10:17 am
Delivery Date: 14 Sep 2011
Leaf Number: 003391

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

Fri Sep 14, 2018 12:25 pm

I would jump on the $2,850 refub option, if it was available. Called my dealer, he said they have not heard of it. The only option from Nissan is at $8,700 (including labor, parts and tax), yes the cost of the battery went up. Would love to explore the salvage Leaf packs option. If I can find someone who can make that happen in the Bay Area (Northern California).

Guess Mux is not offering a USA option. Hey mux if you need a dealer in California I can make that happen, let me know. Guess you need to get to your production version first, I did check the status on your website ;)

mux
Posts: 170
Joined: Sat Jan 13, 2018 3:52 am
Delivery Date: 13 Oct 2011
Leaf Number: 6177

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

Fri Sep 14, 2018 12:44 pm

Yeah man, going to take a while. We don't even have the battery box designed yet and literally at this moment I'm still working on preproduction electronics hardware design. Firmware isn't done either. And even if that all works and the car's good, we still need official regulatory type approval before we can start servicing customers. So it's pushing november-december before we have our first customers in the EU, and likely months after that before we can ship out kits IF that is even legal and possible.

If by some form of arcane magic all of this goes well and we can offer a US option, we'll need an EV specialist garage to do the conversions and handle complaints. But that's so far off and uncertain... don't get your hopes up yet. If you have any way of getting a cheap refurb or otherwise improve your Leaf stateside, don't wait for me and just do it.

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