Most consistent battery/flatest discharge curve?

[jolzgrafe]

I need a low voltage (<10v) battery to run a small motor. The thing is, i need this battery to power the motor as consistently as possible, and I'm wondering what type of battery I should get. From what I understand, I want a battery with a very flat discharge curve, which is either going to be a NiCd, LiPo, or LiFe, but I dont want the memory on a NiCd. So which has a flatter discharge curve, a LiFe or a LiPo? Also, because the motor is fairly low current, and from what I've seen the discharge curve becomes flatter as the C of the discharge becomes greater, so does this mean that I want a lower capacity battery? Any ideas? Thanks.

 

[MikeHalloran]

Consider using a regulator to control the motor voltage.


Mike Halloran
Pembroke Pines, FL, USA

 

[jolzgrafe]

Thanks Mike

I probably should have mentioned that due to the rules of the competition, I cannot use any complex circuitry components. I am limited to motors, batteries, resistors, and capacitors. So I think I'm only left with trying to find the nicest battery i can.

 

[MikeHalloran]

Then, that would be NiCd, and the way to avoid memory problems is to always fully discharge them, and then immediately fully charge them.



Mike Halloran
Pembroke Pines, FL, USA

 

[IRstuff]

Is this for school?

TTFN

FAQ731-376

 

[Qmarcin]

Late or not, I've just joined.

Try the LFP (lithiu-ferro-phosphate) technology. It has 3.6-2.5V range but for most of the SoC (80%) it is 3.3 or 3.2 flat and that is the range where the power is available.