A123 systems Batteries

[evbkezzz]

I read somewhere that they got bankrupt.... Is that true?
Where can I buy their cells from?

Question to those who have experience with a123 systems:
I know A123 systems batteries are highly tolerant.. Just want to hear from those who have used them..
I am planning to charge those cells ~3C-4C, max discharge will be 15A on 3P6S pack.. how many cycles can I expect from them?

Thanks

 

[Joachim]

lithium werks looks the new lucky owner from this a123 brand/chemistry?

on www.nkon.nl the A123 cells are lithium werks https://www.nkon.nl/rechargeable/26650/a123-systems-anr26650m1b-a-grade-3-3v-a-grade.html

 

[miro13car]

Do you mean A123 20Ah pouches ?
I have used them on 2 my ebikes.
LiFePo chemistry cell has lower terminal voltage than NMC that I switched to
3.6V versus 4.2V
But NMC dont last that long if charged to 4.2V comparing with LiFePo charged to 3.6V
With A123 I used 12 in series, with NMC I use only 11 in series.
I never charge my NMC more than 4.00V
and never discharge below 3.5V. This way my NMC cells will last as long as A123 pouches.
So something for something.

 

[miro13car]

Yes
A123 was bought by China company after declared bankruptcy.

 

[fechter]

Cycle life will depend on depth of discharge, C rate and temperature. You can expect thousands of cycles if properly treated.



I've used the early cylindrical cells with good results but I don't have a lot of cycles on them. They are about twice as heavy as Li-ion cells, so not so good for bikes. Good for high rate discharge and not too prone to catching on fire. Discharging them below 2v/cell will damage them, so avoid over discharge.

 

[999zip999]

Just looked it up DH gate has 20ah cells 25.00usd free shipping. Never brought from them.

 

[evbkezzz]

lithium werks looks the new lucky owner from this a123 brand/chemistry?

on www.nkon.nl the A123 cells are lithium werks https://www.nkon.nl/rechargeable/26650/a123-systems-anr26650m1b-a-grade-3-3v-a-grade.html

Will check out thanks!

Do you mean A123 20Ah pouches ?

No the cylindrical ones.

I have used them on 2 my ebikes.
LiFePo chemistry cell has lower terminal voltage than NMC that I switched to
3.6V versus 4.2V
But NMC dont last that long if charged to 4.2V comparing with LiFePo charged to 3.6V
With A123 I used 12 in series, with NMC I use only 11 in series.
I never charge my NMC more than 4.00V
and never discharge below 3.5V. This way my NMC cells will last as long as A123 pouches.
So something for something.

Oh great. I was thinking to do the same. I was planning to keep the max charging voltage at 3.9v and discharge cut-off at 3.2v.
I am planning to charge at 3C rates if the temp is between 20-45 deg C. My discharge will be max 5A a cell. Do you think I can get around 1k cycles? Also, I'm confused calculating the battery pack required this way. Would be great if you can help!

Cycle life will depend on depth of discharge, C rate and temperature. You can expect thousands of cycles if properly treated.



I've used the early cylindrical cells with good results but I don't have a lot of cycles on them. They are about twice as heavy as Li-ion cells, so not so good for bikes. Good for high rate discharge and not too prone to catching on fire. Discharging them below 2v/cell will damage them, so avoid over discharge.

Cool! Please read the above reply.

Just looked it up DH gate has 20ah cells 25.00usd free shipping. Never brought from them.

Alright, I will check it out.

 

[amberwolf]

http://a123batteries.com/online-store/

 

[999zip999]

Charge A123. To 3.5v thats full they be charge to 3.6v
with bms but will bleed lower. Not much capacity above 3.5 Volts. I have 1,380 cycles in 6 years 23,000 miles still a great working pack. 20ah pouch cells less connections.

 

[john61ct]

Oh great. I was thinking to do the same. I was planning to keep the max charging voltage at 3.9v

Too high for LFP, that's for NMC etc

>> This way my NMC cells will last as long as A123 pouches

No. Care parameters do have an effect but LFP has inherently longer cycle lifetimes. Maybe 6-8000 if coddled