These Small prismatic LiFePo4 10Ah - Any good?

[Allex]

The format is very interesting for us, e-bikers
Hangzhou LIAO Technology
They also have pouch packs , 30g lighter and with soldering tabs instead of threaded
High discharge rate capability, 5C continuous, 8C pulse discharge

Any one tried them out?
Homepage: http://en.hz-liao.com/ProductsDetail.aspx?cataname1=LiFePO4%20cell%20Series&catalogid1=255&data_ID=894
Store: http://hzliao.en.alibaba.com/

 

[Allex]

Found some Russians to USE them with success on their homebuilds:
http://electrotransport.ru/ussr/index.php?topic=16492.108

The bike looks brutal with Cromotor:

 

[Tench]

How much?

48 of the larger ones would make a nice 24s2p pack 17" x 12" x 5" and with 24AH even a moderately powerfull ebike would only be pulling 2c peaks.

 

[999zip999]

Price ?

 

[Allex]

US $ 10 - 25 / Piece
I guess this depends on how many you order.
If you check their store here, than it is 13USD/per cell
http://www.alibaba.com/product-gs/1213162432/3_2V_10Ah_LiFePO4_battery_cell.html

 

[arkmundi]

The bike looks brutal with Cromotor:

Love the robust look of that - is it a custom frame or is that in production?

 

[Allex]

Custom

 

[dogman dan]

I would guess that lifepo4 would be comparable to other lifepo4. Rated at 3c. But in use, much happier if limited to 1 to 1.5c. Ping cells for sure really hated a 3c spike. I don't think they will stay balanced for shit if you spike em 5 c.

You would need a custom frame to carry as much as 20 ah in the triangle, and even that much would be iffy for a 40 amps controller.

 

[agniusm]

Actually they are quite happy at 5C. 20ah were tested against a123 20ah cell with similar or better performance. Use google to translate: http://www.e-motion.lt/forums/topic/keletas-el-dviracio-daliu/page/4/

 

[dogman dan]

Cool. I can believe that stuff a lot more from somebody like you, than from somebody selling them.

I just have to paint them all in tar and feathers the same, till they get in peoples hands for real testing.

How many years did they last at 5c? Or is that test still in progress. It's a dilemma, what actually works in the real world takes time to road test. 5c is not unheard of for lifepo4 so it's plausible for sure.

But remember all the excitement about headways being 5c? Then a year or so later they were being called deadways by people that used them at 5c.

 

[arkmundi]

The real world road test of battery cells - yea, that's one of the primary value of the ES community. Much love for all you folks who bother with these tests and posting results and all! Anyone want to compile a table of available LiFePO4 on the market today for comparative purposes?