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Other › What Lipo Balancer for your T-Rex batteries
12-01-2005 08:50 PM  12 years agoPost 1
AV8TOR

rrVeteran

Fort Worth, TX

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What balancer are you using for your T-Rex batteries? Is the PolyQuest PCM Guard 3S Balancer OK?

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12-01-2005 08:58 PM  12 years agoPost 2
Ben-T-Spindle

rrProfessor

Central Illinois

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The PolyQuest PCM Guard will work is getting obsolete – technology has passed it by. I have not used one but some report that it does not balance cells very accurately.

The TP205 and Astro Flight are both good. The TP205 fits the TP2100 battery that I use with no adapters required. The Astro Flight has a different connector and I am not sure what it fits. There are adapters available for most popular batteries and balancers.


.

... BTS

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12-01-2005 09:50 PM  12 years agoPost 3
ShellDude

rrElite Veteran

East Coventry, PA

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I'm using the Astroflight Blinky with my TP and PQ packs.

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12-01-2005 10:09 PM  12 years agoPost 4
bugsb

rrVeteran

rothwell//northants UK

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have alook at this one
http://www.aircraft-world.com/shopexd.asp?id=3590
i have just got it great for 2-5 cell packs
stand alone
or with charger
or discharger
if address gets deleted email me and i will pass it on
ron

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12-01-2005 10:31 PM  12 years agoPost 5
Ben-T-Spindle

rrProfessor

Central Illinois

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I saw the HYPERION balancers advertised in several places but could not figure out if they were compatible with the TP battery connector.

.

... BTS

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12-01-2005 10:48 PM  12 years agoPost 6
bugsb

rrVeteran

rothwell//northants UK

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with the manual
you also get a diagrame for making your own
or you can buy them
it came with 4 leads for 2-5 cell packs
and says that thay work with
polyquest /align/recent e-tec 700mah and above/but check the manual of the maker
ron

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12-01-2005 11:22 PM  12 years agoPost 7
cdyckes

rrVeteran

Nr. Yeovil, Somerset - UK

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The PolyQuest PCMGuard works just fine, and does everything you need it to do.

Personally I prefer the fact that it just limits individual cell voltage during charge rather than bleeeding off excess to achieve balance.

Works with my Polyquest (obviously), TP2100's, Kokam 20C's and FlightPower Extremes after fitting the balance tap lead.

I'm planning to continue use by splicing the PQ leads into whichever LiPo packs I next buy (going to wait till spring and use the existing ones till then).

Recommended!

Colin

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12-01-2005 11:41 PM  12 years agoPost 8
martinic

rrKey Veteran

NB, Canada

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I'm using the TP205 with my TP2100 Prolite and Polyquest 1800XP packs with excellent results. I'm using it along with my Apache 2500 charger.

A charger with integrated balancer (such as the upcoming TP1010?) would be more useful as it could (potentially) moderate its charge rate to achieve proper balance.

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12-01-2005 11:46 PM  12 years agoPost 9
Titan520

rrApprentice

Philippines

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Thunder Power also has a balancer.. it's neat too though it looks really plain. Made of aluminum, so I guess it dissipates heat better duringba;ance discharging.. It does heat up. Lights and souns warning. 1-5cells

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12-02-2005 09:14 AM  12 years agoPost 10
bugsb

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rothwell//northants UK

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i like the fact that you can put this one in your pocket
and use at any time
i have been useing 3 polyquest packs for some time
i pluged in the gizmo and all three are way out of balance
it took about 10 mins for all three to be rebalanced
then pluged in the charger so the gizmo can recharge and keep the balance
plus has saved me money as i have one for 2-5 cells
all the others that i looked at are for 2/3/4/5 cells so i would have to have bought 4 gizmo's
ron

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12-02-2005 12:47 PM  12 years agoPost 11
AV8TOR

rrVeteran

Fort Worth, TX

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Bugsb,
“gizmo”? Are you referring to the PolyQuest PCM Guard Balancer?

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12-02-2005 12:57 PM  12 years agoPost 12
bugsb

rrVeteran

rothwell//northants UK

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the gizmo ( slang) sorry
is the hyperion 2-5 cell ballancer that i have just bought
ron

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12-02-2005 01:11 PM  12 years agoPost 13
willard

rrApprentice

Indianapolis, Indiana, USA

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I got to chime in here

I recently got a TP-205 and looked very closely at the hyperion balancer.

The reason I didnt get the hyperion is it will balance cells at any state of charge and discharge to 0.05v per cell.

The problem with that is with a matched pack, they are matched so that all cells are at 4.2v fully charged, when the pack is discharged the cells will discharge at slightly different rates (very very slight) due to manufacturing tolerances etc (no two cells will ever have exactly the same internal resistance)

a perfectly matched 3 cell pack when fully charged will have all cells at 4.2 volts. When discharged the cell voltages may be 3.00, 3.02, 3.03 for exmaple.

The Thunderpower balancer recognises this and is designed with two balancing tolerances. If cells are less than 4.15 volts it will only act to correct a very large imbalance (0.15 volts or more). When cells are above 4.15 volts it will balance to 0.05 volts per cell.

This means that stand alone balancing with the TP balancer, with a pack that is not fully charged, will not unbalance a matched pack.

Stand alone balancing with the hyperion balancer with a pack that is not fully charged will effectively 'unmatch' the cells in the pack by matching there voltages. When you then go to charge the pack, all cells will no longer reach 4.2volts at the same time (the matching has been 'undone' by the balancer'

Make sense?

Will

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12-02-2005 01:36 PM  12 years agoPost 14
bugsb

rrVeteran

rothwell//northants UK

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help me out hear
for me to balance an uncharged pack is asking for trouble
evan though the manual says it will turn off at x amount of volts
i like the fact that
1 i can do a quick check at the field
as i may charge up a pack 2-3-4 times a day
2 at home i can use it with the charger on a slow charge or upto 6 amps
3 can do a discharge as well

now if i bought one balancer for 2 and another for 3 and 4and 5 cells
most makes only work with a charger
and would have cost (what money i have ) alot more
now if you think that there may be a problem with this balancer
and may not be used under certain conditions i would like to know
so that i do not end up with a bad pack
ron

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12-02-2005 04:46 PM  12 years agoPost 15
willard

rrApprentice

Indianapolis, Indiana, USA

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actually get a hyperion from aircraft world.

It seems much more versatile than the thunderpower one.

Just dont balance packs when discharged.

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12-02-2005 04:55 PM  12 years agoPost 16
JLundberg

rrApprentice

Denham Springs, Louisiana

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I just ordered one.
Looks likes it should do a great job. I hope

Has anyone put taps on a non-tapped lipo pack? Is it
difficult to do?


Really don't want to destroy what is working good for me but
understand the need to check balance.

Thanks,

John

T-Rex 450X (modified), 450th, CC35, TP2100, CCPM, 9CHP,

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12-02-2005 05:16 PM  12 years agoPost 17
cdyckes

rrVeteran

Nr. Yeovil, Somerset - UK

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Pretty easy to do. Heres a Tp2100 and PQ balance lead before re-insulating the cell tabs with insulating tape and reheatshrinking. Only do it if you're completely comfortable about soldering quickly and well, and make sure you don't short the cells with the iron whilst soldering:-

And the 'Three-head' balance lead I made up so I could check/charge individual cells as well:-

Colin

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12-02-2005 05:26 PM  12 years agoPost 18
willard

rrApprentice

Indianapolis, Indiana, USA

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I second cdykes commment about soldering on taps.

And I have one more thing to add. Be very careful with the positive tab. It is thin aluminum and bending it will make it first become very loose and then tear!

The negative tab is much sturdier, it is nickel. The connections between packs are the negative nickel tabs folded around the positive aluminum tabs, so they also are sturdier.

But that aluminum tab with the positive wire soldered to it is FRAGILE

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12-02-2005 05:52 PM  12 years agoPost 19
Gary Jenkins

rrElite Veteran

Nowhere, US

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I added connectors to 7 TP battery packs, just remove the heat shrink, label, reinforced tape(white). I uncovered one terminal at a time , removing the kapton tape, to solder the connector wires to the terminals. It takes about a half an hour per pack.

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12-02-2005 11:11 PM  12 years agoPost 20
JLundberg

rrApprentice

Denham Springs, Louisiana

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Thanks everyone. I'll give it a shot and let you know how it goes.

John

T-Rex 450X (modified), 450th, CC35, TP2100, CCPM, 9CHP,

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