Questions to Thunder-Sky?

I have just bought some Thundersky LFPF cells - and I want to lay them on their side - to fit them into my custom trike... The recomendation is to use them "standing up" - I want to know what detremental effect laying them on their side has??

evpower.com.au has low cost BMS units for these "small" (40AH - 90AH) batteries.... specifically made for the Thunderskys'.

I want some. How much and where did u buy them from.
Also how big are they? Are they similar to D cells?

Hi guys,

re putting cells on their side, this is what weve dug up:
http://www.aeva.asn.au/forums/forum_posts.asp?TID=867

thundersky cells are large prismatic type cells with bolt down terminals.
the 40AH cells are 1.5kg and the 90AH cells are 3kg

Matt

ok whats the term prismatic actually mean? I imagined triangularish like a prism but in the pics they look like rectangular 'bricks'?
What I want to get my hands on is the D cell type batts in the Dewalt Nano's. Theres got to be a cheaper way than buying and breaking Dewalt packs?

Question:
Is it possible for the slow "pulse charging" from a TS charger (2 amps for 2 minutes, then 20 minutes "rest", the "pulse" equivalent of an average 0.2 amps "trickle"), if left "ON" for days, eventually overcharge (and damage) a high cell (for example a TS LiFePO4 40 or 60 Ah cell) in an unbalanced pack?

gday colin,

yes they are shaped like bricks.
the cells in the dewalt packs are A123 and are very powerful (which is why they are very expensive)
you could go for LifeBatt batteries, which come pre-assembled into battery packs with BMS and charger (these are cheaper but only 1/4 the power density, with the same energy density)
LifeBatt uses PSI cells, if you would prefer to build your own pack.
Headway cells are fairly good, but these are an 1/8th the power density of the A123 cells (but the same energy density)

for scooters, thundersky is more than powerful enough.
my 40AH 60V pack will put out 6kw
the 60AH 72v packs in the maxi scooters are good for 12kw

id suggest only going for the more powerful cells if you are building a motorbike.

dunno about the overcharge issue....id be interested to hear the answer to that one aswell

Id suggest also asking it on the thundersky yahoo group

Matt