1p A123 in my buggy... Enough?

[lydiasdad]

I am running 6s1p a123 cells in my hyper 7 and am very happy with it. It uses a 9xl with 12/46 gearing and I get over 10 minutes of runtime. I was worried about the voltage drop when running a 1p setup but these cells have really impressed me. I have a thread about my hyper 7 conversion with pics and more info that may be useful to you.

[jhautz]

Originally Posted by lydiasdad

I am running 6s1p a123 cells in my hyper 7 and am very happy with it. It uses a 9xl with 12/46 gearing and I get over 10 minutes of runtime. I was worried about the voltage drop when running a 1p setup but these cells have really impressed me. I have a thread about my hyper 7 conversion with pics and more info that may be useful to you.

Have you had any issues with heat in the cells? Just curious what ESC you are running also. With 6s the voltage would be higher so the currrent will be less than with the 4s I'm considering, but it sounds like you have had some decent results here. You are encouraging me to try it and at least see what I get.

[lydiasdad]

Heat is not an issue at all with the batteries. They have only been warm to the touch after each session. I am using a bk 7020 esc. I disagree with serum about them not performing well in a 1/8 vehicle. The vehicle the cells are used in is irrelevant. As long as the amp draw from the batteries is not excessive, they can work very well in a 1p configuration. That is why I used a low kv motor an 6s with conservative gearing, to keep the amp draw down. If I had a video camera I would post a vid of it, I think many people would be surprised at how much punch my buggy has. I would link to my hyper 7 thread if I knew how:005:

[zeropointbug]

I have plenty of experience with A123 cells, I was probably one of the first persons to have acquired some (release day, developer kits). 1p in a buggy is not enough, the voltage drop will be quite substantial. You will have to keep the amp draw below 70 amps to keep good voltage sustained. They can deliver lot's of power for their mAh rating indeed, but you have to design your pack to take into account voltage drop. You should design your battery pack first, then choose your motor.

I have a 5s2p A123 pack, under 100 amp 'spike' draw, the voltage is roughly 14volts.

Do you know what the expected amp draw will be?