New DIY LiPo Option

[xyster]

Thought this looked interesting for a DIY LiPo pack:
http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=3119

At $34.15 per 8 ah battery, a 37 volt 16 ah (10s2p) pack could be built for $683 -- a little cheaper than the 37v 15ah EV Tech packs, but of course without the BMS, charger, or box.

 

[knoxie]

Hi Xyster

Good find for the diy peeps! these new batts that I have been testing really are holding up I must say, yesterdays ride 16.5AH and I could have gone more without going in to the danger zone, with BMS and charger should not be much more.

They will be good for true 20AH IMO out of a 14lb battery, with hardly any sag under load (35A) (even to the bitter end) quite amazing, the Chinese are really coming they may just be the ones who lead out in the Lipo market I feel as the prices keep dropping and the capacity and the performance go up.

Cheers

Knoxie

 

[joystix2]

I wonder why they didn't just sell a 36v pack with the 8ah cells. They have a bunch of the smaller cells already. The PCB is only $50 and the 36v 2a Lithium charger is only another $35. This would be a great 36v setup if the specs are true.

PCB:
http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=2341

charger:
http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=2635

Ric

 

[xyster]

Hi Ric,

Their specs say that PCB limits the current to 27 amps -- a problem for people like me with 35 and 40 amp controllers. Also, it doesn't appear to balance the batteries. And certainly their single, 10-cell charger doesn't either.

It might work great for a 20 amp system with a battery-balancing RC charger like Patrick's, or multiple single-cell chargers like mine.

8ah seems a nice size for flexible pack design since 8ah is pretty close to the minimum size most people would need, and too small a size means hundreds of batteries to connect -- and who'd be dumb enough to spend hundreds of hours building by hand a pack like that!?

On a related note, I'm scheduled to take delivery of 30 more 18650's from all-battery today! For a total of 300 (20s15p) onboard my bike. Perhaps that's some kind of record ....probably not...

I think with that I'll call it quits on any more batteries -- there's just no more room on my ride, and 30 pounds of lithium is enough as far as weight. I would have liked to push the voltage up over 90V. Oh well...