video: 10sA123 Buggy with eagletree inserts

[othello]

Thanks for the positive feedback.

@_paralyzed_ and jnev
This was the first time i drove in this area. As i live in the city, it's not so easy to find some space to bash especialy on a beautiful sunday afternoon. This was my second battery pack. I also shot some video on a big open concrete space with my first battery pack but forgot to hook up the mic ;-( That's why i choose this part of the video.

Usually i drive in an other spot during the week. On weekends this area is filled with familys enjoying their bbqs. So no way to drive there.

@Finnster
The highest Amp draw was 60A. I had 7 peaks above 50A. The rest stayed below 45A. Motor temperature was no issue at all. That is the beauty of a high volt system when setup right. Outside temperature was around 20 C (68 F). As i have the non finned Neu i use two small fans above the motor, so that temperatures remain safe during summer time. The highest recorded motor temperature with 30 C (90 F) ambient temperature was 50 C (122 F). Without fans temperature reached once 70 C (158 F). That is when i decided to use some fans. With 10s A123 the motor spins up to 45000rpm and thus can heat up.

@Aqwut
That's right. With 30v, 40A already translates to 1200W. And you won't need much more in a buggy. The batteries are only warm to the touch (same for the ESC) after a 13 to 18 minute run, as my average Amp draw is around 10A. In this run for instance the average Amp draw was 9.78A or an average of 290 Watts.

[lutach]

Very impressive indeed. I thought about putting my Jazz controller in the buggy I have, but one stopped working after I had it in my truck with 10S A123. It was my fault as the Jazz performed well with a 2 pole motor, but with the 6 pole 600L it stopped and is giving me a warning light. I'll see what is wrong with it and hope it gets going again.

[zeropointbug]

That is so cool othello! Looks like it's a pretty powerful setup in the buggy, looks like it roughly 1200watts that it pulls.

How are you charging your pack? Balancing?

[othello]

@lutach
Jazz Esc are tough little controllers. I had 2 motor failures (overheating and front bearing broke) and in both cases (massive Amp peaks) the ESC survived. I even drowned one while being active accidently and the next day it worked flawlessly. My jazz 80 did fine with my 8 Pole inrunner with RPM peaks of 40000 which was above its rated max rpm of 150000rpm with 2 pole motors. So i wonder what happened with yours ... a 6 pole motor should run fine unless you would rev it above 50000rpm. Well of course Amp draw could have been an issue since it (jazz 55) is designed for 65A surge currents. But i would expect the motor to cogg when drawing more then 65A. Hope you can fix it.

@zeropointbug
Yep ... there is more then enough power. At least more then the tyres can handle
My peak was around 1560watt. i had 7 peaks higher then 50A. The rest was below 45A. So yep ... between 1200 and 1400 Watt.

I ordered a Hyperion EOS1210 which should be at my place this week. First i used a regulated laboratory power supply which is able to handle 36V and 20A. After 1 month it gave up on me. In between i use a Robbe infinity 2 charger which has no A123 program. So i terminate charging manually at 36V. Balancing is no big issue with those cells, as they kind of balance themselves when charging. Safe terminating voltage is between 3.6v and 4.2v so i don't mind too much about balancing.

[zeropointbug]

1500 watts peak, that's good, I am getting over 1500 watts from a 7s1p pack, which I was surprised!

Too bad about your regulated power supply... I am using a BK Precision programmable PS unit, very good quality, excellent price too!

[lutach]

I hope Mike can have the PowerJazz with the Jazz car software. I will problably send all my Kontroniks to see if they need software update and a few to get fixed.

[crazyjr]

Originally Posted by lutach

I hope Mike can have the PowerJazz with the Jazz car software. I will problably send all my Kontroniks to see if they need software update and a few to get fixed.

So they are going to do car software? I been waiting on that