alozzy
Posts: 1388
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Battery Upgrades are very possible

Fri May 17, 2019 11:54 pm

Wow, I'm surprised that mux is selling those! That definitely provides some hope for DIY retrofits of newer packs in older LEAFs!!
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

Oilpan4
Gold Member
Posts: 850
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: Battery Upgrades are very possible

Mon May 20, 2019 9:29 am

I'm going to start looking for a 40kwh pack late this year or next year.
2011 white SL leaf with 2014 batt.
Chargers: Panasonic brick moded for 240v, duosida 16a 240v and a 10kw setec portable CHAdeMO
Location: 88103

estomax
Posts: 225
Joined: Fri Jan 20, 2017 9:23 pm
Delivery Date: 21 Jan 2017
Leaf Number: 424033
Location: Seattle

Re: Battery Upgrades are very possible

Mon Jun 10, 2019 7:53 am

Dala wrote:Update, the Man-in-the-middle CAN boards from Muxsan arrived today. Purchased a 30kWh pack, gonna figure out shipping next, and I'm also always on the lookout for any 40kWh packs :)

Here is where the magic happens:
Image
very cool! Do keep us all updated on your progress with this, my 24kwh pack has at least another couple of years left but this is exciting progress.
2013 Leaf SL Premium
27k, 93% SoH 2/17 32k, 96% SoH 6/17
46k, 94% SoH 2/18 52k, 88% SoH 6/18
62k, 87% SoH 2/19 68k, 84% SoH 6/19

Dala
Posts: 101
Joined: Sun Oct 28, 2018 11:24 am
Delivery Date: 01 Jan 2015
Leaf Number: 316851

Re: Battery Upgrades are very possible

Wed Jun 12, 2019 7:43 am

Today I took delivery of a 30kWh pack, time to take it apart hopefully this weekend :)
Image

It was really dusty, the car must have been thoroughly crashed! 2017 with 14k miles on it!

kebin
Posts: 8
Joined: Sun May 19, 2019 2:18 pm
Delivery Date: 23 May 2019
Leaf Number: 18520

Re: Battery Upgrades are very possible

Thu Jun 13, 2019 2:47 am

As a software engineer and leaf owner, I am really interested in seeing how you are going to write a functional CAN bridge between your 24kwh car and the 30kwh battery.
In your case, reverse engineering the 24kwh protocol seems doable, since you can observe your current battery communicating with your car in all kinds of situations.
However, I wonder how difficult it will be to understand what the 30kwh battery outputs and expects as you are missing a piece of the puzzle, the car with which it communicates.
I hope CAN messages are not too different, please keep us informed of all the gory details :)

alozzy
Posts: 1388
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Battery Upgrades are very possible

Fri Jun 14, 2019 9:27 pm

He doesn't need to hack the CanBUS, because he already purchased a "Man-in-the-middle" CAN board from Muxsan:

https://youtu.be/hLJefVNS8JA
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

kebin
Posts: 8
Joined: Sun May 19, 2019 2:18 pm
Delivery Date: 23 May 2019
Leaf Number: 18520

Re: Battery Upgrades are very possible

Mon Jun 17, 2019 12:17 pm

@alozzy: What I am wondering about is not the physical aspect of interfering communications between the battery and the VCM, but rather how to alter the messages (So how to program the firmware of the board mux is providing).
For this, you need to understand what each battery sends and expects to receive, unless of course they use exactly the same protocol.

alozzy
Posts: 1388
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Battery Upgrades are very possible

Mon Jun 17, 2019 8:27 pm

Presumably muxsan provides some documentation with the product, or he has open sourced the firmware and it's available on GitHub or whatever.

A Google search of GitHub reveals quite a few code projects:

"nissan leaf" canbus site:github.com

This one in particular looks promising:

https://github.com/johnmacmillan96/CAN

One would hope that, rather than having to interpret the CANBUS raw data yourself, muxsan has provided a simple to use API for manipulating specific days such as battery capacity, battery temperature, etc but that still be a work in progress.

Perhaps @muxsan will weigh in here at some point with more information.
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

Dala
Posts: 101
Joined: Sun Oct 28, 2018 11:24 am
Delivery Date: 01 Jan 2015
Leaf Number: 316851

Re: Battery Upgrades are very possible

Thu Jul 04, 2019 5:32 am

I am now driving with the hybrid 24/30kWh pack, will do a shakedown before diving into the CAN-bridge properly.

Beefy cells!
Image

On the road after 3 days downtime.
Image

More info here: http://www.japtoys.net/forum/viewtopic. ... =15#p71210

kebin
Posts: 8
Joined: Sun May 19, 2019 2:18 pm
Delivery Date: 23 May 2019
Leaf Number: 18520

Re: Battery Upgrades are very possible

Thu Jul 04, 2019 7:07 am

Thanks for the update and nice work!

I thought you were going to put the CAN bus man in the middle adapter between the battery and the VCM in order to avoid having to open the packs and do the cell swap.

I wonder whether this approach is feasible, if it was, and if 40/62kwh batteries are electrically compatible with leaf gen1, it would mean that you could upgrade a gen1 with a gen2 battery quite easily, by just translating the protocols on the fly.

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