LiPo help...

23 replies [Last post]
Junk-mod-er
Joined: 03/25/2006
User offline. Last seen 2 years 27 weeks ago.

I bought this LiPo pack today:

Specs at:
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXMDM7&P=7

I bought it from HobbyTown USA (because it's a walk-in store), and I'm so stumped...

I have a Smart Charger (for NiMh/NiCd and LiPo charging) AND a 2 or 3 cell Balance Charger.
What I have come to realize is that they say NEVER charge through ESC lead...then where the hell do I charge it through? The Apache plug goes into the balancer; but from what I've been told is that A BALANCER DOESN'T CHARGE IT, it just fully charges each cell (and that you plug it into the pack while you charge it with your 'real' charger).

I've also lost my adapter for my balancer...so I need a 15~18V wall adapter (I will come up with something).

I am so confused; can someone help me?

~Junk ET

Junk-mod-er
Joined: 03/25/2006
User offline. Last seen 2 years 27 weeks ago.
Re: LiPo help...

Donziikid wrote:
Your obviously talking about a Charger's Balancing capabilities, I was referring to an External Balancer. It's always a safe bet to use both, instead of just one or the other. ;)

I'm talking about an external balancer. :wink:
I use an Apache 2030 Smart Charger for charging and a Venom LiPo Balancer. But I just use a charger.

~Junk ET

Donziikid
Joined: 06/13/2006
User offline. Last seen 2 years 30 weeks ago.
Re: LiPo help...

Your obviously talking about a Charger's Balancing capabilities, I was referring to an External Balancer. It's always a safe bet to use both, instead of just one or the other. ;)

Junk-mod-er
Joined: 03/25/2006
User offline. Last seen 2 years 27 weeks ago.
Re: LiPo help...

Donziikid wrote:
Is that balancer for the battery you have purchased? All plugs are different with different companies. ;)

It's a Venom LiPo balancer. Both the same Apache style plug and it charges at a 0.75A rate. Which is fine for this pack.

~Junk ET

Donziikid
Joined: 06/13/2006
User offline. Last seen 2 years 30 weeks ago.
Re: LiPo help...

Junk-mod-er wrote:
Donzi; remember the Stampede? I have a 3S balancer from that...you told me about balancers months ago. :wink: :lol:

Is that balancer for the battery you have purchased? All plugs are different with different companies. ;)

Junk-mod-er
Joined: 03/25/2006
User offline. Last seen 2 years 27 weeks ago.
Re: LiPo help...

Murdoch wrote:
Did I call you an idiot junk? :roll: Don't go there pal.

Forgive me...I was in a really bad mood yesterday...I basically had my summer start to get ruined.

Donzi; remember the Stampede? I have a 3S balancer from that...you told me about balancers months ago. :wink: :lol:

Thanks for the help, all. I really apprechiate it. :D

~Junk ET

Donziikid
Joined: 06/13/2006
User offline. Last seen 2 years 30 weeks ago.
Re: LiPo help...

*starts whistling while searching for proper links.*

Personally, I use PolyQuest LiPo, not Great Planes, but basically all the same.

I'm sure you're well familiar with your LiPo by now, and should know what that "extra" white plug is for. That, would be a balancing port. Most chargers for that sort of LiPo come with that plug as an "extra". You install that plug instead of a Deans Female so you can charge it with that plug. That plug insures proper balancing of each individual cell. (I hope you know what that means.)

What you can do is do what I have done: Buy an "external" balancer, and just plug the balancer up to the LiPo port, and plug your Female Dean onto the charger. This balancer will insure that everything is being charged correctly.

DO NOT USE, plugs are different because it is a different brand!

PolyQuest external balancer:
http://www.hobby-lobby.com/balancers.htm

That little gadget (most run about $30, not bad for what it is) will insure proper charging. Your charger, although it is a "smart charger", will not always correct for this sort of imbalance. I always use an external and an internal charger's "smarts" when charging a LiPo battery.

Banter: Yuck. Great Planes. :lol:

Murdoch
Joined: 04/22/2006
User offline. Last seen 1 year 28 weeks ago.
Re: LiPo help...

Did I call you an idiot junk? :roll: Don't go there pal.

The LiMn batteries I have were ripped out of a Milwaukee V28 pack for power tools.

Junk-mod-er
Joined: 03/25/2006
User offline. Last seen 2 years 27 weeks ago.
Re: LiPo help...

Murdoch wrote:
well if you're charging it with a wall adapter, stop right away.

Wall adapters, if they don't have the correct hardware and method will turn your beautiful pack into a paperweight.

I've noticed that the pack is prewired with Deans connectors. Use that to charge the battery.

You never mentioned what brand your smart charger was or what charge rate it can supply.

Another thing about lipos is you can charge them at 1C (In this case, 910mah) or lower. never higher. 1C is basically the milliamp rating on the battery. For example: If you have a 6000mah pack you can charge that at 6 amps with no problem.

I have three lipos plus two packs of a new type of battery.. LiMn. I always charge the Lipos at 1C and the LiMn is where I can really crank the charge rate.

I'm not an idiot...I know what C is and how to charge battery packs.

I'm using an Apache 2030 Smart Charger.
I charged the pack under a fan at 750mA.

~Junk ET

Most_Wanted
Joined: 03/18/2007
User offline. Last seen 3 years 33 weeks ago.
Re: LiPo help...

@ Murdoch

What are the LiMn batteries you have? Are they lithium manganese nickel? Where did you get them?

Murdoch
Joined: 04/22/2006
User offline. Last seen 1 year 28 weeks ago.
Re: LiPo help...

well if you're charging it with a wall adapter, stop right away.

Wall adapters, if they don't have the correct hardware and method will turn your beautiful pack into a paperweight.

I've noticed that the pack is prewired with Deans connectors. Use that to charge the battery.

You never mentioned what brand your smart charger was or what charge rate it can supply.

Another thing about lipos is you can charge them at 1C (In this case, 910mah) or lower. never higher. 1C is basically the milliamp rating on the battery. For example: If you have a 6000mah pack you can charge that at 6 amps with no problem.

I have three lipos plus two packs of a new type of battery.. LiMn. I always charge the Lipos at 1C and the LiMn is where I can really crank the charge rate.

Junk-mod-er
Joined: 03/25/2006
User offline. Last seen 2 years 27 weeks ago.
Re: LiPo help...

The setup is...
TOO powerful...

When I pull the trigger as lightly as I can, it eats up the main gear and shavings of plastic fly out.

8O

~Junk ET

Junk-mod-er
Joined: 03/25/2006
User offline. Last seen 2 years 27 weeks ago.
Re: LiPo help...

Battery's charged...

I can hear from just running the motor that it isn't good for it. >.>

I went to test it and the motor gear is too short and pushes itself away from the main gear. I'm going up in gearing...by a lot...oops? Oh well. :lol:

~Junk ET

Junk-mod-er
Joined: 03/25/2006
User offline. Last seen 2 years 27 weeks ago.
Re: LiPo help...

CowboySiR03 wrote:
If you plan on doing three cell, then make sure you don't over gear it. Big gears/High voltage/High KV all adds up to extreme heat(which is bad, ok?) :lol:

I only plan I driving it up to top speed on one run and then stopping to let it cool.

:lol:

~Junk ET

CowboySiR03
Joined: 03/16/2005
User offline. Last seen 2 years 38 weeks ago.
Re: LiPo help...

You can set startup power with your controller. :wink:

If you plan on doing three cell, then make sure you don't over gear it. Big gears/High voltage/High KV all adds up to extreme heat(which is bad, ok?) :lol:

Junk-mod-er
Joined: 03/25/2006
User offline. Last seen 2 years 27 weeks ago.
Re: LiPo help...

Huh...I double posted.

The motor AND ESC say up to 3S LiPo.

~Junk ET

Anonymous
Re: LiPo help...

Junk-mod-er wrote:
[quote:2fb7a8e84e="CowboySiR03"]Be careful...I've read reports of 9200KV motors delaminating(breaking up on the rotor) on three cell li-po's. For that reason, there are motors that have a max voltage level.

Since you're only getting about 18Amp discharge be sure to set your BL esc at low startup power to avoid cogging. :wink:

I read the manual for it and went to their website Voltage: 10 cell NiMh/NiCd or 2/3 cell Li-Poly.

I have the Mamba 25 ESC...and I don't have the programming kit.
I spent practically all of my money in the past week to get all of my projects done. My mom got pissed and my dad just talked to me about it......

[quote:2fb7a8e84e="fer_rayado124"]So are you finally sticking a brushless, on a worthy race car, or loosing your time with a monster truck. :lol:

OH YEAH!! :lol:

Well, I'm going to get this thing charging.

~Junk ET

Did the mamba say 2/3 cell lipo or the motor.

Junk-mod-er
Joined: 03/25/2006
User offline. Last seen 2 years 27 weeks ago.
Re: LiPo help...

CowboySiR03 wrote:
Be careful...I've read reports of 9200KV motors delaminating(breaking up on the rotor) on three cell li-po's. For that reason, there are motors that have a max voltage level.

Since you're only getting about 18Amp discharge be sure to set your BL esc at low startup power to avoid cogging. :wink:

I read the manual for it and went to their website Voltage: 10 cell NiMh/NiCd or 2/3 cell Li-Poly.

I have the Mamba 25 ESC...and I don't have the programming kit.
I spent practically all of my money in the past week to get all of my projects done. My mom got pissed and my dad just talked to me about it......

[quote:c8f0d69d41="fer_rayado124"]So are you finally sticking a brushless, on a worthy race car, or loosing your time with a monster truck. :lol:

OH YEAH!! :lol:

Well, I'm going to get this thing charging.

~Junk ET

fer_rayado124
Joined: 03/23/2006
User offline. Last seen 4 years 5 weeks ago.
Re: LiPo help...

Junk-mod-er wrote:
This pack is going with a 9200kV brushless motor.

So are you finally sticking a brushless, on a worthy race car, or loosing your time with a monster truck. :lol:

CowboySiR03
Joined: 03/16/2005
User offline. Last seen 2 years 38 weeks ago.
Re: LiPo help...

Be careful...I've read reports of 9200KV motors delaminating(breaking up on the rotor) on three cell li-po's. For that reason, there are motors that have a max voltage level.

Since you're only getting about 18Amp discharge be sure to set your BL esc at low startup power to avoid cogging. :wink:

Junk-mod-er
Joined: 03/25/2006
User offline. Last seen 2 years 27 weeks ago.
Re: LiPo help...

CowboySiR03 wrote:
What i mean to say is that Li-Po's can be charged at a 1C(capacity) rating, which means you can charge at a maximum 910mAh.

That's what I thought you meant; I just wanted to make sure. :)

Even when I had my 6000mAh LiPo pack for my Stampede...you'd be crazy to charge even that about 1A.

I am going to charge this pack at 0.75A (750mA, whatever you prefer).

I'll just be sure that I have it in my "flameproof" area while charging.

Thanks for your help, I really apprechiate it. :)

~Junk ET
EDIT: Just to get your mind racing...
This pack is going with a 9200kV brushless motor.

CowboySiR03
Joined: 03/16/2005
User offline. Last seen 2 years 38 weeks ago.
Re: LiPo help...

What i mean to say is that Li-Po's can be charged at a 1C(capacity) rating, which means you can charge at a maximum 910mAh.

Junk-mod-er
Joined: 03/25/2006
User offline. Last seen 2 years 27 weeks ago.
Re: LiPo help...

CowboySiR03 wrote:
I read through your situation and I'm sorry to say you may be screwed...

That gave me a good laugh. :lol:

[quote:8407e01514="CowboySiR03"]My guess is you should be fine to follow normal charging practices if you keep to the C rating during charging.

I'm not following on that part...
I don't see why I couldn't just charge it through the ESC lead like any other pack.

I'm not going to "just" do anything with a LiPo pack...
I'll spin my chair around to see all of my stuff on fire. :lol:

~Junk ET
PS: Thanks for being the person that finally answers...I was so anxious!

CowboySiR03
Joined: 03/16/2005
User offline. Last seen 2 years 38 weeks ago.
Re: LiPo help...

I read through your situation and I'm sorry to say you may be screwed...

The packs you have say you need the Li-Po "interface" charger system that they make. Why exactly is unclear to me...this is the only company that requires a balancer/charger combo. I would phone your LHS and ask them if they've had any experience with these packs and why it says do not charge through the esc lead. My guess is you should be fine to follow normal charging practices if you keep to the C rating during charging.