Grinhill wrote:I've been using my 25V 80A controller for the past few weeks (from my first build). Power is around the 1200W mark, and speed is noticeably less. I also have to use my 6S battery which is only 5ah, so back to recharging at work.
On the upside, I'm probably getting fitter than when running the higher power rig.
Hobbycity has received the unit back, but they are out of stock of replacements. Will wait and see what happens.
Grinhill wrote:Hi Mike
With pedalling, this setup does 42 km/h on the flat and 32 km/h up a 10% grade. Uses about 8 Whr/km downhill and 13 Whr/km uphill.
Unfortunately I only have one 6S pack, which I almost cooked yesterday, drawing 4.6 Ahr from it on the uphill run. It was very warm, and had expanded noticeably. I clamped the sides togethr as it was cooling, and it charged back up OK. 10 or 15 Ahr would be much better!
Grinhill wrote:It's already served me very well, even if it died tomorrow. I'm going to regret writing that aren't I?
That's not too bad on a single 6S pack!
Luke has a point... it may be time to sink another 59 into a new pack...
also as odd as this may sound to some people, I have begun using 2 pieces of 1/16" ABS plastic when I build my packs... I clamp the packs within these ABS plastic "end caps" really just rectangular pieces the length of the packs then I wrap them in extreme duct tape before releasing the clamps.
End result is that since Ive begun this "process" (ghetto as it is) i've not had a single expanding battery due to heat and the temperature of my newer packs is 10-15 degrees f cooler than my old loose sided packs.
I assume this is due to the factors luke mentions above but I had no idea when I started doing it, I just didn't want to see the outter cells swell anymore = )_
Grinhill wrote:Thanks guys.
The plan for my next build is to buy four 6S packs, and then combine them with my existing 8S2p pack to build a 4p10s pack.
This pack is my very first LiPo pack. It's already served me very well, even if it died tomorrow. I'm going to regret writing that aren't I?
amberwolf wrote:I hope not! But if it does, can I buy the BMS from you?