NiallDarwin
Posts: 4
Joined: Thu Jul 09, 2015 1:58 am
Delivery Date: 12 Dec 2015
Leaf Number: 004321
Location: New Zealand

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Thu Jan 12, 2017 1:16 am

Thanks Valdemar.
I've actually used that program for re-flashing electric bike motors-I sell and meddle with eBikes. However I did it purely in a following the instructions kind of way and didn't have a clue what any of the values meant. Maybe its time to learn a little more?
A fellow NZ-based Leaf tinkerer is Russian so if you can dredge the actual post, the language won't necessarily be a barrier.

Cor
Posts: 116
Joined: Sun Jun 30, 2013 6:53 am
Delivery Date: 07 Jul 2015

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Thu Jan 12, 2017 1:27 pm

NiallDarwin wrote:Hello World, long time watcher, first time poster here.
I’ve just been through the process of swapping Gen2 cells into a Gen1 case. Unfortunately, we got gung-ho, decided Nissan surely wouldn’t change the order of wires in the BMS connector and were quickly proved wrong by the smoke getting out. It seems pretty certain that Nissan won’t help me out with programming a BMS to suit my home-modified pack. After reading this thread I think there’s hope.
Thanks so much for sharing your work so far. I wish I’d found this about 3 days ago :oops:

Hi Niall,
I think your safest bet is to buy a Gen 1 BMS computer and move IC9 from the bad one to the replacement BMS, because as far as I have been able to determine, all the "identity" of the BMS is stored in there. IC9 is the serial memory right next to IC1, the big processor chip.
Blowing the ASICs like you have done, does not affect the processor, since it is optically isolated from the high voltage circuits with the 24 ASICs that measure and balance the cells.
Once IC9 is soldered in the correct orientation on the replacement BMS, make sure to use the *old* wiring on all your packs to match the Gen 1 BMS.
Make sure you buy a Gen 1 BMS with all white connectors to swap IC9 into.
The best option at this moment on Ebay is one for $60 with free worldwide shipping:
http://www.ebay.com/itm/Nissan-Leaf-2011-BMS-for-battery-managing-with-wires-/332086774774
The wires may come in handy if your connectors were damaged in the process of blowing the BMS.
Success,
Cor.

NiallDarwin
Posts: 4
Joined: Thu Jul 09, 2015 1:58 am
Delivery Date: 12 Dec 2015
Leaf Number: 004321
Location: New Zealand

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Thu Jan 12, 2017 2:47 pm

Cor, order placed. Thanks for the help and encouragement.
I'd also like to try cloning that chip seeing as its so vital to the car's correct functioning. Luckily some local geeks seem keen and able to help with that.
I'll keep you posted.

QueenBee
Posts: 1564
Joined: Sun Aug 08, 2010 5:14 pm
Delivery Date: 20 Jun 2011
Leaf Number: 2062
Location: Bellevue (Seattle), WA

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Thu Jan 12, 2017 3:59 pm

And to think I gave away the BMS that came with the contactors I needed because I didn't think it would have much value with it being hard coded to a specific LEAF :)

NiallDarwin
Posts: 4
Joined: Thu Jul 09, 2015 1:58 am
Delivery Date: 12 Dec 2015
Leaf Number: 004321
Location: New Zealand

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Tue Jan 17, 2017 12:49 am

QueenBee wrote:And to think I gave away the BMS that came with the contactors I needed because I didn't think it would have much value with it being hard coded to a specific LEAF :)

Well, we'll see. So far its just a maybe :)

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