Lipo repair

[rawfuls]

LVC, I'm running a Novak Smart Stop 2S, in series to the inline BEC in the ESC.
I ran commando before though...... I knew when to stop, luckily, it caught it this one run.

Could the different mAh ratings be because of the BEC taking more out of one pack than the other?

As far as the physical characteristics... My memory isn't too fond, and I'm only 14 years old... Not good...

But, after the pack, they were around 130-135°, yes, I know, quite bad... I think I might have OCD, because I just can't leave things alone, and get bothered by the slightest things..

But it may have been a bit extra air, or cushiony on the top of one pack.... I tossed it into a bag of ice pack (ice pack is concealed), and about an hour later, it was hard again, but you could see the sticker (I replaced the sticker with a paper, and then clear tape over it, so there might be air under it) was going down a bit...

[lincpimp]

Is this on an old novak hv setup? If the bec draws off one pack that would be the reason for the different charge amounts.

Are you happy with the performance, or does it not perform as well as before? More setup info would be nice...

[rawfuls]

Not at all...

EMaxx 3906, KD 970s (I know, heavy as hell, but lately, it's been kickin booty pretty nicely )

EVX1 ESC.... shaddup..
DX3R w/ SR3000.....

What else ya need?

And the performance, awesome..

I haven't used it since I recharged, and taking logs...
Like I said, I'm scared and I think I have OCD...

[lincpimp]

So you are managing to run a single 970 with the old evx... Must have the gearing just right!!!! I ran a pair of those soup cans in a maxx once (before brushless) and it was insane. I could melt the solder off my side by side nimhs... I most likely had way to much gearing in that beast. Ahh, the days when I was r/c dumb...

Anyways, that is not a super high draw setup, so you should be fine. Just swap the pack that goes on the bec and lvc side every run, and make sure your lipos are charging back up to close to their rated capacity. Often capacity is a good indication that the batts are being pulled too hard. But I have no idea what voltage the smart stop switches off at. You are close to getting 5000mah out of them so you may be ok. Just keep running them, if they crap out, can em!

You may have OCD, do you step on cracks in the sidewalk? Do you try to count to even numbers all of the time? Do your friends make fun of you? Do you have any friends? Do you call your cat Mr. Kitty? Do you wear just one glove, and dance like a coffe shop employee? Just wondering as those can be signs of OCD, or being a fluffer...

[rawfuls]

Nah, dual KD970s, mah bad.


Yeah, the wires are getting a bit hot on my 14AWG, switching to 10-12AWG soon... When I get meh PowerPoles.

These packs have a good year on them or so...
They have been awesome.....

I'd rate them 8 out of 5 if I could.. I love em that much...

Let's hope these Turnigy's that I've been dying to run (Also waiting for PowerPoles, don't wanna use cheap Deans on these) are good as well (Knock on Wood)

I love your comments Linc, and as a matter of fact, I like even numbers more than odds, I try my best to not step on cracks when I'm bored walking home, I have two friends, my computer and my chair, no kitty cat yet..

WAIT, are you telling me wearing one glove and dancing like a coffee shop employee isn't normal?!!?!?! Oh crap...

[lincpimp]

Originally Posted by rawfuls

WAIT, are you telling me wearing one glove and dancing like a coffee shop employee isn't normal?!!?!?! Oh crap...

Thanks for the laugh buddy... I needed it after this week (head cold and a big workload due to missing a day)

Dang, dual 970 motors on an evx, you must have the gearing spot on...

Stepping up to 12 gauge and keeping the wires short will help alot. I assume you have got rid of any connectors (especially the stock traxxas bullets) between the motors and the esc? Hope so, as those cause alot of resistance.

You will like powerpoles, I really do. Plan to try them out on my higher draw systems soon. I need to make a few 6s packs out of the spare 5000 25c enerland cells I have laying around (I have 18 I think...) and see how well the powerpoles compare to deans. I have never had issues with deans, but like the fact powerpoles can be wired in series without adapters.

[rawfuls]

No problem....
Overdrive gearing... Things get a bit hot under the body, but it'll do!

I was a main review-er for Dan @ KershawDesgins, as far as the connectors...

I wanna switch em to hobbycity 4mms, or 5mms, is this good?

So you're liking the PowerPoles huh?

[lincpimp]

Originally Posted by rawfuls

No problem....
Overdrive gearing... Things get a bit hot under the body, but it'll do!

I was a main review-er for Dan @ KershawDesgins, as far as the connectors...

I wanna switch em to hobbycity 4mms, or 5mms, is this good?

So you're liking the PowerPoles huh?

Powerpoles are pretty good, especially if you repeatedly plug and unplug then, as they were designed for that.

[lincpimp]

Ok, here is some info on my observations on zippy packs.

I have recently dealt with alot off the zippy H lipos. Seems like they are crap. I have had a few packs sent to me that have 1 bad cell. I remove that cell, rewire the pack, and the next day another cell has puffed. I had one pack puff all of the cells, just sitting in my toolbox. I will say it gets warm where the lipos are, maybe over 110f at times, but all of my lipos are in the same box and none of the enerland, neu fp, or elite cells have puffed while sitting...

Kinda brings me back to my noob days when my maxamps packs all puffed while sitting in the tool box... Talk about pissed off.

I know alot of people have had good success with the H packs, so I will just say that if 1 cell lets go, seems like the best bet is to can the rest of that pack and buy another pack...

As cheap as these packs are I consider them disposable. I will not be repairing anymore of these due to that. Not really worth it, IMO.

Now I have not seen this issue with the rhino and flightmax packs. I have personally beaten the snot out of a rhino 4900 5s pack and it surprised me. I have not ran any of the flightmax packs, or the turnigy. I have reconfigured a few flightmax, construction is no better than the H packs.

As far as recommendations go, I would suggest the rhino over the others, for build quality and performance. I would skip the H packs, and buy the higher c rated flightmax packs.

Just my observations, your experience may vary.

[Metallover]

After looking at and comparing lipos all day, I've noticed turnigys don't have much of a burst rating. I'd be sure to get the 30c if anything. I love my flightmax on the other hand.

[rawfuls]

The Turnigy's are 20C...
Or is it 25....

[Metallover]

Thry have 20, 25, and 30c iirc.

[Jahay]

im bringing this post back from the dead....

Linc... i need some lipo help/advice. I do not have pictures of the lipo yet but hopefully you can just confirm the problem and then advice the course of action i should take once i get pictures up?

I have a hyperion G3 6500mah 35c 3s lipo.

Firstly i will say that my electrics are fine as the truck runs nicely with my other lipos... problems occur only with this lipo.

How it started:
Had a few bad landings with my truck one day... the next day, i plugged my lipo into the ESC, i got the beeps and was about to move. But then upon accelerating, the truck would stutter terribly. If i lifted the truck off the ground, and slowly acclerated then the wheels would spin just about... once the truck is back on the ground. I get problems.

i never had a problem with charging the lipo even when it was in this state.

So i then thought that the lipo probably had a solder break or a bad connection somewhere, possibly from a bad landing etc...

Now the lipo does not charge and reads error when charging, and i get no stuttering at all when i connect it as it doesnt even turn the esc on.

When i took all th shrink wrap off the motor, i could not see any obvious signs of solder breaks or anything? i will take pics and post them this evening, but i am wondering how you would approach the lipo in terms of fixing it?

Thanks a lot... hopefully you can help me out

Josh

edit...
This is how my motor behaves on this lipo. It sounds like it is cogging...
http://www.youtube.com/watch?v=MMS4q...yer_embedded#!

[suicideneil]

Do you have a digital multimeter to test with? You could check the main battery connectors/ wires to see if you can get a total pack voltage, and/ or check at the balance taps to try and locate a break somewhere or a dead cell.

[brushlessboy16]

Originally Posted by Jahay

im bringing this post back from the dead....

Linc... i need some lipo help/advice. I do not have pictures of the lipo yet but hopefully you can just confirm the problem and then advice the course of action i should take once i get pictures up?

I have a hyperion G3 6500mah 35c 3s lipo.

Firstly i will say that my electrics are fine as the truck runs nicely with my other lipos... problems occur only with this lipo.

How it started:
Had a few bad landings with my truck one day... the next day, i plugged my lipo into the ESC, i got the beeps and was about to move. But then upon accelerating, the truck would stutter terribly. If i lifted the truck off the ground, and slowly acclerated then the wheels would spin just about... once the truck is back on the ground. I get problems.

i never had a problem with charging the lipo even when it was in this state.

So i then thought that the lipo probably had a solder break or a bad connection somewhere, possibly from a bad landing etc...

Now the lipo does not charge and reads error when charging, and i get no stuttering at all when i connect it as it doesnt even turn the esc on.

When i took all th shrink wrap off the motor, i could not see any obvious signs of solder breaks or anything? i will take pics and post them this evening, but i am wondering how you would approach the lipo in terms of fixing it?

Thanks a lot... hopefully you can help me out

Josh

edit...
This is how my motor behaves on this lipo. It sounds like it is cogging...
http://www.youtube.com/watch?v=MMS4q...yer_embedded#!

I had this problem with my 4 cell hyperion 6500, the front board(opposite the battery leads) cracks due to Nosediving and lawn darting- which breaks the connection- you have to reflow the solder joints.

I did this and the pack is back to its normal diff distroying self.

I also do lipo repairs if you need it