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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › new Thunder Power Prolite batts, 2nd set of mystery leads
05-08-2005 06:40 AM  13 years agoPost 1
lakespinner2

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north carolina

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Hi, I'm new to the battery powered heli world (got a new T-Rex). I have a few lipo batts for my foamie planes and I charge them with a Triton charger with no problems.

My new Thunder Power Prolite batts for the T-Rex ( I have a 2 cell and a 3 cell batt pack ) have a second set of leads coming out from each battery pack. It's a 4 pin connector with all pins used. The only info that came with them was basically a safety sheet that doesn't mention the extra leads. I can't find the 'extra' leads mentioned on their web site either.

I know from searching the threads that they provide some type of cell checking / balancing ability. I can't seem to find any info on whether I MUST use them, or if I SHOULD use them; and if I do use them, what is the pinout for the connector.

Can I charge them thru the normal ( red/black) leads and ignore the second set of leads or do I ( or should I ) charge them with the small wires on the little connector.

I can't wait to try them. thanks.

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05-08-2005 09:20 AM  13 years agoPost 2
dauphinas365

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Germany

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You can ...
Hello,

you can charge them through the normal ( red/black) leads. The second connector is very likely the connector for a balancer unit in order to keep the three lipo cells (which are connected in line) in sync. As lipo cells are very sensitivy for voltages more then 4.23V it is recommanded to assist the charging with a balancer unit that cuts the voltage for an individual cell if the voltage is over ~4.21V. For 3 cells therefore you need 4 leads (as shown in your photo). How they are connected: please find out using a volt meter.

regards Klaus

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05-08-2005 03:12 PM  13 years agoPost 3
lakespinner2

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north carolina

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thanks dauphinas365, I'll try to ring out he wires with a voltmeter. I was wondering if there's some intelligent circuitry under the shrink wrap that uses the little wires for communicating with a smart charger. You're probably right, I suspect they are directly connected to the cells; it just irks me that that I can't find any documentation for them.

I checked and the the 2 cell and the 3 cell both have the same 4 wires on the little connector. The mystery continues.... sort of.

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05-09-2005 08:01 AM  13 years agoPost 4
Rick_H

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Boulder City, Nevada

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Thunder Power is comming out with a cell balancer. See their web site it is on the front page:

Thunder Power

Rick

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05-09-2005 01:10 PM  13 years agoPost 5
lakespinner2

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north carolina

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I did check out their web site but there's not much (actually nothing, nada, zip) on the charge / balance leads. Or at least I can't find it if it IS there. I did see they have a TP-205 Thunder Power Cell Balancer coming out May 8th. Looks like I may be getting yet another charger.

What strikes me odd is that there is no documentation or specs on the batteries that are already available, and sitting on my table. I'd be happy with just a note that I wouldn't destroy the batts by charging them like any other lipo battery. Which IS what I did last night, I got tired of waiting and searching the web for info.

One local guy said some batteries with charge leads shouldn't / can't be charged with the standard red / black leads. but, I did charge them with the normal leads using my Triton last night and it seemed to work ok.

I'm just nervous when charging $150 worth of new batteries when I don't have any instructions from the manufacturer. I'd hate to destroy the built-in protective circuitry IF there's any in there, i'm not even sure if it has smart circuitry or not.

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05-09-2005 01:47 PM  13 years agoPost 6
Dr Lodge

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Guildford, Surrey - UK

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This setup looks identical to what Flight Power/Duralite batteries have done. The 4 pin plug is for a cell balancer circuit and my FPEX batteries can be charged directly via the red/black power leads (with or without the call balancer attached) or via the cell balancer itself. I choose to charge via the power leads, and the cell balancer balances the cells through the entire charge, and will also balance even when all charging leads are disconnected and its just sitting there on the bench.

I doubt there is any magic circuity connected to your balancing leads, all I can see is shrink wrap and its no hiding anything.

Vibe 90, Vibe 50, Vigor CS x2,
Dyna-x, Knight 503D, Logo 10,
TRex 500, Furion, Gaui EP200

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05-09-2005 04:03 PM  13 years agoPost 7
lakespinner2

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north carolina

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thanks Dr Lodge

You're probably right about the magic circuitry, there's something very thin, hard and flat along the edge but it's probably just a mounting surface or a terminal connection under the shrinkwrap.

After thinking about it some more, I suppose if there is a hazard stemming from charging normally thru the normal power leads, there would probably be warning stickers all over it. they seem to be really concerned about explaining safety issues, just not so much on the technical explanations and use of these batteries.

Hopefully thunder power's balancer will hit the streets soon.

thanks

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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › new Thunder Power Prolite batts, 2nd set of mystery leads
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