Ha. You thought you were rid of me.
I am not quite there?
discussion on lipo all seems about hardcore fussing about with RC sub paks that have to be laboriously and meticulously charged and balanced. Its not for those who have a life. Perhaps i have been misled. Hi drain also has limited appeal for ebikes, as per the goldenmotors link below.
I didnt know lipo came in pouch cell form.
i wasnt aware, & nobody explained, & i got the impression, nobody used
further, the chinese seem to make it a major puzzle finding out what exactly is in a pak; wrong/ambiguous terms (lipo/polymer/li-ion,cannister/pouch/bms/c-rate,,...???), vague, ...
http://gebattery.en.alibaba.com/product ... _cell.html
Charging ways:Constant-current/constant voltage
Max Charge Current:≤1CA
Max Discharge Current:(Constant Current)≤100A,(Impulse Current):≤400A
Standard Charge/Discharge Current:0.3 CA
Cycle Life:( 80DOD%)≥500Times
Operating Temperature:(Charge)0°C~45°C, (Discharge)-25°C~60°C
Weight:less than 400g"
i like general rules of thumb, so the above means; a 36v 20ah, 5c (am happy with 2-3c, but 5c is good so its not straining) discharge using 10 x 3.7v nominal?? cells at 400g ea. for a total of 4kg for 20ah, or ~100amp (3.6kw) burst.
that is pretty awesome.
500 cycles - meh. hang the expense, tho i hear these numbers are optimistic.
A similar lipo pouch cell
http://gebattery.en.alibaba.com/product ... _3_7V.html
an example of a similar finished product:
http://www.alibaba.com/product-detail/F ... 0.0.Wfi9uF
So, is this as convenient as a bottle battery - is recharge as safe and simple? Whats the catch?
seeking wisdom on this. pls help?
incidentally, gary salo of goldenmotor expresses similar views to mine about lifepo4, but better:
http://www.goldenmotor.ca/news/184/LiFe ... M-ION.html
NB, yes, a 12x cell 36v lifepo4 is heavier than a 10 cell lipo 36v pak, but they are a very steady 38.4v vs 37v diminishing?.
am thinking, if the 15ah lifepo4 is too big and heavy, maybe its my estimate is the problem. Get a sturdy lifepo4, but smaller.
an hour and a half is all i want to be in the saddle, and am thinking 250w ph average use, a generous allowance w/o no pedaling on my mid-drive, - 25-30kph, with 500w on tap if needed.
10ah lifepo4 does that at a liveable ~3.5kg, tho 12ah (~4.2kg) seems sound for some wiggle room as it ages.
Pouch brands seem a well kept secret by pak makers. What gives? Ought one be wary?
all the fakes and lies of 18650s seem absent in the pouch world.
i have heard of crap quality tabs to work on, but not poor function or fraud or mislableing?
ta in advance