Dala
Posts: 92
Joined: Sun Oct 28, 2018 11:24 am
Delivery Date: 01 Jan 2015
Leaf Number: 316851

Re: Battery Upgrades are very possible

Thu Aug 01, 2019 12:24 pm

SageBrush wrote:
Thu Aug 01, 2019 3:02 am
Dala wrote:
Thu Aug 01, 2019 2:29 am
-
1. Nissan is not interested
Why is this even listed as an issue?
-
No technical support
No warranty
No garage access

If a problem occurs after installation, where does the car owner go ?
I offer 1year warranty, technical support if something goes wrong or question arises.

If problems arise later down the line, you can always go to an official Nissan dealership with it. It's still their battery! Or you can g back to the battery installer.

This will be done on cars that already have the OEM 5/8year warranty expired. I don't think people need another 8 year warranty on packs that are 1/2 the price of Nissan.

Lothsahn
Posts: 410
Joined: Thu Apr 05, 2018 4:35 pm
Delivery Date: 04 Jan 2018
Leaf Number: 007797

Re: Battery Upgrades are very possible

Thu Aug 01, 2019 2:03 pm

Dala wrote:
Thu Aug 01, 2019 12:24 pm
This will be done on cars that already have the OEM 5/8year warranty expired. I don't think people need another 8 year warranty on packs that are 1/2 the price of Nissan.


Fully agree. I would totally take you up on your service, Dala, if I lived nearby and had not just done it myself.
2011 Silver SV, purchased 2018, lives in Missouri (previously in CA)
LeafSpy Pro + BAFX Products OBDII dongle
Battery swap 2019/04/24 (87% SOH, 12 bar)

Dala
Posts: 92
Joined: Sun Oct 28, 2018 11:24 am
Delivery Date: 01 Jan 2015
Leaf Number: 316851

Re: Battery Upgrades are very possible

Sat Aug 03, 2019 1:06 am

Update on instrumentation situation. The CAN bridge is having issues keeping up with the 2013-2017 VCM. Sometimes it takes too long for messages to be modified, causing random turtle mode from the VCM. The older 2011-2012 VCM does not have so tight tolerances, so it works fine there. Muxsan is investigating.

In the meantime, I've thrown together a quick custom screen for Leafspy (don't mind the shoddy formatting :D)
Image

I really wish it would be possible to do mathematical operations on this screen! Right now this is just a lookup table, but it's better than driving blind!

Lothsahn
Posts: 410
Joined: Thu Apr 05, 2018 4:35 pm
Delivery Date: 04 Jan 2018
Leaf Number: 007797

Re: Battery Upgrades are very possible

Sat Aug 03, 2019 6:42 pm

Such good news, Dala! Really exciting stuff...
2011 Silver SV, purchased 2018, lives in Missouri (previously in CA)
LeafSpy Pro + BAFX Products OBDII dongle
Battery swap 2019/04/24 (87% SOH, 12 bar)

Dala
Posts: 92
Joined: Sun Oct 28, 2018 11:24 am
Delivery Date: 01 Jan 2015
Leaf Number: 316851

Re: Battery Upgrades are very possible

Sun Aug 04, 2019 11:49 pm

Some negative news, the 30/24 pack gave me a scare yesterday.

I was chugging along the highway at 60mph (dash showed '--' miles remaining, '---' % SOC), and I estimated real SOC to be 25% left (3.5V min cell voltage). I tried to pass a car, and it triggered turtle! This should not have happened until 3.1V min cell voltage, but I guess momentarily at high amp draw the min voltage will go quite low.

So, I continued on the highway for 8 miles while in turtle. Not fun. So I guess this will be added on the to-do list. Maybe a restart of the car would have brought it out of turtle?

On a positive side, this explains some of the mails I've received. For instance, there was a guy in Poland whose company did a 40/24 bruteforce upgrade, and they got turtle after 140km traveled on the first testrun. They must have experienced the same thing, premature turtle due to voltage drop under high load, and they called the upgrade a failure. Except it's not a failure, it's just the way these batteries work with a 24 BMS...

Dala
Posts: 92
Joined: Sun Oct 28, 2018 11:24 am
Delivery Date: 01 Jan 2015
Leaf Number: 316851

Re: Battery Upgrades are very possible

Fri Aug 30, 2019 10:53 am

After modifying the 0x5BC CAN message, and adding 70gids, the 24/30kWh bruteforce battery is atleast doing two things right now
Image

As you can see, it now reports remaining km even when all the bars have disappeared. Before it just went '---'! Also it doesn't trigger LBW anymore at 16%, it instead triggers close to actual LBW!

Now only two things left to fix, the dash SOC is still showing wrong % values. Also the chargebars disappear way too soon. But progress is progress! :D

DougWantsALeaf
Posts: 842
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: Battery Upgrades are very possible

Fri Aug 30, 2019 4:16 pm

Very cool
2019 SV Plus Silver
2013 Leaf SV
100 Mile Club Member (Number 87)
Max distance on 13 Leaf: 120 miles
Max distance on 19 Leaf: 242 Highway 4.5 miles/kWh (4.9 KWh remaining)

goldbrick
Posts: 539
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: Battery Upgrades are very possible

Fri Aug 30, 2019 8:57 pm

DougWantsALeaf wrote:
Fri Aug 30, 2019 4:16 pm
Very cool
+1. Even though I bought my Leaf partly for its lack of maintenance some part of me secretly wants to take on a project like this. Oh well, maybe in my next lifetime.

mux
Posts: 201
Joined: Sat Jan 13, 2018 3:52 am
Delivery Date: 13 Oct 2011
Leaf Number: 6177

Re: Battery Upgrades are very possible

Sat Sep 07, 2019 2:32 am

For those interested in the 40kWh upgrades, I have just started trying to on-the-fly modify pretty much every CAN message put out by the 40kWh battery to try and make it work with a 2011 Leaf. There are surprisingly few differences, the main ones seem to be a few extra muxes making it confusing to the VCM what's happening, but the CAN datastream is mostly the same. I'll be sharing progress as I make meaningful steps.

Oh also, I wish I got a 2013+ Leaf, the connector is different under the first gen... Very annoying.

mux
Posts: 201
Joined: Sat Jan 13, 2018 3:52 am
Delivery Date: 13 Oct 2011
Leaf Number: 6177

Re: Battery Upgrades are very possible

Tue Sep 10, 2019 4:55 am

And it works. Getting a 40kWh battery to work on a 24kWh Leaf is not hard. Took me a day. I'll post more details later :)

Return to “Enhancement / Change Requests”