Need some opinions on a power dump

[ozace]

1st leaving the packs charged for a couple of weeks will result in a slight voltage drop but it may be enough to confuse the settings in the Jive (depending on how the lipo mode determines cell count).
One deep discharge of a lipo will permantly damage the pack , no ifs or buts. The pack may take a charge ofter the deep discharge but may not hold voltage (would explain the issue with pack "b" if thats what happened.)

[ozsteel]

I sent Kontronik an email, a copy of which is shown below....

Hi, I have just installed a Jive80+LV on a Mikado Logo 5003D with a 1,300V/rpm Hacker motor - 8pole.

I have two batteries - both of the same type and age - 6S1P 5000mAH both have been charged only about 5 times each and both have been carefully looked after. I use a Schulze isl 6 - 330d charger and both batteries seem to be functioning normally.

When I connect one battery to the Jive80+ I get the expected 3 beeps - also motor moves slightly with each beep - and then six short beeps in 3 couples which I assume signifies the 6 cell count - and then the motor will run normally.

When I connect my other battery I get the 3 beeps - motor moves as expected - but don't get the six short beeps in couples and the motor won't run.

Change back to the other battery everything seems fine. So one battery is ok the other is not.

I notice I get the LED flashing 3 time on the battery that won't work.

What could be the problem?

I have set Mode 4 and also selected LiPo using a ProgCard I and a cut off voltage of 3.0V per cell. I have selected slow down on low voltage detection.

I time my flights and don't rely on the ESC to tell me that the battery is running low.

I use the BEC to power the receiver and servos. I don't have a ProgCard II yet so I use the BEC as programmed at the factory - about 5.4V.

Your help on this would be appreciated.

I got this reply...

Dear Sir,

It is a safety function which is getting active. A quick solution would be if you reduce to 4 or 5S or take a motor with a higher inductivity which does not do to high ripples in part load.

Please sent the controller for a small update to us.

sorry & best regards

Michael Franz
-------------------------------------------------------
KONTRONIK GmbH

Maybe I should have stuck with my Jazz 55-6-18!!

Anyway I'll send it back to Kontronik and keep you guys posted.

[Big Fil]

Man that sucks. I know you've been having the worst luck with these issues as of late. Good thing is they are taking care of it. Bad thing is that you have to send it in. Unfortunately that's the risk of having the newest toy on the block.

Can anyone explain what the response from Kontronik was eluding to? Don't quite understand what the guy was saying.

[ozace]

I sent Kontronik an email, a copy of which is shown below....



I got this reply...



Maybe I should have stuck with my Jazz 55-6-18!!

Anyway I'll send it back to Kontronik and keep you guys posted.


This SUX, i cant stand this garbage. Now i will have to send mine back too for the update.:thumbdown:

[OICU812]

Yea ya know I am one of Kontroniks biggest fans, but I gotta say they been really peein me off lately to....:bawl

[LITHIUMSTATIC]

Can anyone explain what the response from Kontronik was eluding to? Don't quite understand what the guy was saying.

That was a strange response.... I think he is saying he to adjust the flux capacitor.

[Big Fil]

That was a strange response.... I think he is saying he to adjust the flux capacitor.

LOL, i actually think it was like a jedi mindtrick "These are not the droids your looking for, move along" which the Kontronik translation was "Your motor must be causing the problem, send the ESC back to us so we can fix the firmware":dontknow

[Adam Turner]

That makes two of us!

OzAce in your opinion what does leaving a fully charged LiPo for two or three weeks do to the pack? That's the only difference in the two pack I have.

Maybe you can clear something else up for me. What is the consequence of running a LiPo pack to 100% capacity - ie. 18V or putting 5,000mAh back into a 5,000mAh pack? Does it kill the pack or just shorten it's life? and by how much? Is the answer the same if you only do it once or does it need to be done multiple times to wreck the pack? If multiple - how may times?

Too many questions I know but maybe it will help more than me to have the answers.

Thanks....

Leaving a lipo fully charged is not a good idea, thats why some chargers have a storage mode. Basically if you fully charged it at night when the temperature was say 20 degC,and the next day you leave it in the car up to 40C. The cell voltage will reach over its max (4.2V) and will start to damage itself. Not very good for the pack at all. (thats why packs work better when its warmer)

If you over discharge the battery while it is in a heli and your drawing huge current then that is very bad for the pack too. Rule of thumb is if you hear the head speed drop suddenly then you have gone too far.
If you discharge the pack at 0.5A all the way to 100% then thats fine, just remember to use your v-balance so it will stop the discharge when the cell voltage is at 3V.

Sometimes this is a good way to reboot your pack. Discharge it down at 0.5A and then charge it up again at 0.5A. Do not attempt this without a v-balance. Look at the mA going in after a full charge and it should be the rated pack capacity.

I have also taken small rx bats down to 0V accidently by leaving the model on, and have had no problems with them because of the slow discharge.

[ozsteel]

bump

[ozsteel]

I sent Kontronik an email, a copy of which is shown below....



I got this reply...



Maybe I should have stuck with my Jazz 55-6-18!!

Anyway I'll send it back to Kontronik and keep you guys posted.

Here's a follow up - its taken some time to get back to you all - my second battery that wouldn't work with the Jive 80+ LV and I thought it might be fried worked perfectly with a Jazz 80-6-18. I've sent the Jive back to Kontronik and am waiting on its return. I'll let you all know what happens next.