60 Ah NMC prismatic cells 20 kWh *Sold*

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jonescg
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60 Ah NMC prismatic cells 20 kWh *Sold*

Post by jonescg »

Hi all,

I need to sell these prismatic LiYuan cells for Pauline. They were originally going to be installed into her iMiEV, but she needs to sell the car ASAP. So we installed the original battery back in and it's good for about 80 km range. Another sale thread for that soon - maybe $8000?

Anyway, the cells are these ones from Jack Zhang - 3.7 V nominal, 4.2 V fully charged, 2.8 V empty.
The terminals are aluminium and have an M4 threaded hole for copper terminations. I have made up 12 separate polycarbonate boxes (10 for 8s, and 2 for 4s) to suit the iMiEV, but they might also serve as a useful enclosure for any application. Of course, if you want to convert your iMiEV to use these cells you are most welcome - I have the BMS blanking boards and everything. I have the copper buslinks cut up ready for a series installation. It would be ideal to keep the current draw below 20 A as I'm not convinced the threaded pads are all that great. The thread including pictures of the cells and all the gear can be found here:
http://forums.aeva.asn.au/viewtopic.php?p=78295#p78295

Alternatively, the 90 cells would make for a 333 V DC battery which is ideal for any high voltage hybrid inverter like Goodwe ET series https://www.goodwe.com.au/energy-storag ... -278_7.asp or the Fronius Symo https://www.solargain.com.au/sites/defa ... utions.pdf

Any BMS capable of talking to an inverter can work - ZEVA or Batrium works.

Asking $6000 for the whole lot, enclosures, BMS blanking boards for the iMiEV and all. I can arrange shipping at your expense; it might come to $250 or so.
Spec sheet is here:
3.6V60Ah-NMC.pdf
(190.09 KiB) Downloaded 64 times
AEVA National Secretary, WA branch chair.

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jonescg
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Re: 60 Ah NMC prismatic cells 20 kWh worth $6000 ono

Post by jonescg »

BUMP!

I need space in my shed. Who wants 90 of these NMC cells? It's about 20 kWh all up.
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antiscab
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Re: 60 Ah NMC prismatic cells 20 kWh worth $6000 ono

Post by antiscab »

it's a shame they don't fit in the prelude :(
Matt
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells

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jonescg
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Re: 60 Ah NMC prismatic cells 20 kWh worth $6000 ono

Post by jonescg »

*triggered*

😡

Not enough of them anyway, it would be both short range and underpowered.
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nuggetgalore
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Re: 60 Ah NMC prismatic cells 20 kWh worth $6000 ono

Post by nuggetgalore »

antiscab wrote:
Wed, 24 Jun 2020, 23:06
it's a shame they don't fit in the prelude :(
Its a shame they do not (easily) fit my iMiEV :(
Still tempted though.

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jonescg
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Re: 60 Ah NMC prismatic cells 20 kWh worth $6000 ono

Post by jonescg »

All sold. Guy came around tonight to use them in a storage project.
I still have the blanking PCBs if they are of any use for folks, but I have my doubts.
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brendon_m
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Re: 60 Ah NMC prismatic cells 20 kWh *Sold*

Post by brendon_m »

Well that's one less thing for you to worry about

nuggetgalore
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Re: 60 Ah NMC prismatic cells 20 kWh *Sold*

Post by nuggetgalore »

brendon_m wrote:
Tue, 21 Jul 2020, 18:37
Well that's one less thing for you to worry about
Yep and made the decision for me to not go ahead and attempt a very difficult project.

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jonescg
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Re: 60 Ah NMC prismatic cells 20 kWh *Sold*

Post by jonescg »

Well, funny turn of events. The guy who bought them emailed me the next day.

Paraphrasing: The cells are crap! They won't charge past 3.9 V, and they are low capacity! They're junk! I want my money back!!!

I hadn't tested them myself, never even took them out of the box really. So I said sure, return them. He did, and mumbled something about them not being good enough. So I decided to put one on charge and test it today. Took a charge just fine, discharged at about C/2 and it checked out at 60 Ah. The guy was using a crap charger I'd say.
Discharge test.JPG
Discharge test.JPG (27.57 KiB) Viewed 241 times
So the best part is that Andreas can buy them now! I'm packing them up to ship on Monday. Good to see the whole lot go to someone who really wants them.
AEVA National Secretary, WA branch chair.

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brendon_m
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Re: 60 Ah NMC prismatic cells 20 kWh *Sold*

Post by brendon_m »

Crikey, the legacy of that imiev is bit of a roller coaster

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Re: 60 Ah NMC prismatic cells 20 kWh *Sold*

Post by doggy »

Interesting he could not charge beyond 3.9V. That would have lost him 12AH (judging from Chris's graph). I agree, sounds like a battery charger issue. Perhaps he was using something set for a different cell chemistry.

Cheers,
Dave

antiscab
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Re: 60 Ah NMC prismatic cells 20 kWh *Sold*

Post by antiscab »

He was probably using a lab power supply not a charger. No point getting the power supply to put out 4.2v if there's voltage drop on the leads. It's why an actual single cell charger has separate voltage sense leads
Matt
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells

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