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How to charge a 10s pack in the field - 4/25/2006 9:31:06 PM   
depo



Posts: 24
Joined: 1/3/2005
From: Vicenza, ITALY
Status: offline 		Which is the best method to charge the 10s packs in the field?

I'm planing to use a 12V, 80-100A Car Battery, but i'm not sure it will be enought to carge 2 times (in an afternoon) a TP5300 10s4p. If it is enought, will this 12V battery probably damage after a short time? I don't want to use a gasoline power supply!!

best ragrds,

depo

< Message edited by depo -- 4/25/2006 9:37:31 PM >
       Post #: 1

RE: How to charge a 10s pack in the field - 4/25/2006 11:21:00 PM   
OhD


 

Posts: 427
Joined: 10/23/2002
From: west hills, CA, USA
Status: offline 		You should get four or five recharges out of it depending how deep you want to discharge the 12V and the TP5300s. The deeper you discharge the shorter the battery life. I went for the Honda generator.

Jim O

quote:

ORIGINAL: depo

Which is the best method to charge the 10s packs in the field?

I'm planing to use a 12V, 80-100A Car Battery, but i'm not sure it will be enought to carge 2 times (in an afternoon) a TP5300 10s4p. If it is enought, will this 12V battery probably damage after a short time? I don't want to use a gasoline power supply!!

best ragrds,

depo


(in reply to depo)
       Post #: 2

RE: How to charge a 10s pack in the field - 4/26/2006 3:26:00 PM   
Magne


 

Posts: 333
Joined: 3/7/2004
From: Moss, NORWAY
Status: offline 		Hello Depo.
Is this a normal car battery, or is it a battery suitable for deep discharges?
If it is a battery you already have, then fine, use it. I typically get 3 recharges on 10s 6000 mAh TP batteries, sometimes 4 if I limit the current to limit the voltage drop, out of a 110 Ah battery.
But if you intend to purchase a battery specifically for this application, then I would recommend getting a battery suitable for deep discharges.
They are typically sold for "leisure" applications, such as caravans, boats etc. Cost about the same or a little more, but may last longer.

Magne

(in reply to OhD)
       Post #: 3

RE: How to charge a 10s pack in the field - 4/26/2006 5:19:32 PM   
depo



Posts: 24
Joined: 1/3/2005
From: Vicenza, ITALY
Status: offline 		Thanks Magne and Jim O,

I didn't bought a battery untill now, so i think i'll buy one for deep discarge, as Magne explained. I think i'll never need to charge more than 3 times my LiPo packs at the field...

Best regards,

depo


(in reply to Magne)
       Post #: 4

RE: How to charge a 10s pack in the field - 4/30/2006 9:03:34 PM   
Sprink



Posts: 2236
Joined: 4/23/2003
From: London, UNITED KINGDOM
Status: offline 		Charging these big packs causes the voltage to drop significantly coming from the source battery. I am using a 135 ah liesure battery, and charging my 10s packs at 5.5 amps (max for a Cameleon) the voltage will drop to around 11.5v! to get to 42 volts, the charger will quadruple the ampage being drawn from the source battery.

So your 100 ah battery may have the capacity but not be able to deliver the current.

_____________________________

"If it doesn't break, it is probably too heavy"

(in reply to depo)
       Post #: 5

RE: How to charge a 10s pack in the field - 5/1/2006 9:39:33 PM   
Neo02



Posts: 270
Joined: 8/20/2003
From: Lugano, SWITZERLAND
Status: offline
quote:

ORIGINAL: Sprink
So your 100 ah battery may have the capacity but not be able to deliver the current.


Hello to all,

my question: would charging 2 times 5S packs with 2 separate chargers (instead of one 10S pack on a single charger) help by not letting the voltage drop too deep?

Regards,
-Fabrizio


_____________________________

Fabrizio Albonico
SUI 36291

(in reply to Sprink)
       Post #: 6

RE: How to charge a 10s pack in the field - 5/2/2006 8:33:23 AM   
Magne


 

Posts: 333
Joined: 3/7/2004
From: Moss, NORWAY
Status: offline
quote:

my question: would charging 2 times 5S packs with 2 separate chargers (instead of one 10S pack on a single charger) help by not letting the voltage drop too deep?


No, not if you charge from the same source battery. The two chargers would just draw half the current each, with the same total current drain from the battery.
An other reason not to do this: The two chargers would not terminate the charge at exactly the same voltage. Even if they were identical chargers they will be differently calibrated. This will cause imbalance between the two packs when these are connected and discharged in series.
If I charge the two packs as 5s, I always use the same charger (twice), and always let the charger complete the charge cycle. When I charge as 10s, I often terminate the charge cycle before it is finished. (90-95% fully charged after 1 hour.)
Just my opinion.
Magne

(in reply to Neo02)
       Post #: 7

RE: How to charge a 10s pack in the field - 5/2/2006 9:28:36 AM   
rm



Posts: 237
Joined: 11/29/2002
From: ohio, OH, USA
Status: offline 		[/quote]
An other reason not to do this: The two chargers would not terminate the charge at exactly the same voltage. Even if they were identical chargers they will be differently calibrated. This will cause imbalance between the two packs when these are connected and discharged in series.
If I charge the two packs as 5s, I always use the same charger (twice), and always let the charger complete the charge cycle. When I charge as 10s, I often terminate the charge cycle before it is finished. (90-95% fully charged after 1 hour.)
Just my opinion.
Magne
[/quote]

This isn't really a problem. Just hook them in parallel and they will equalize a lot faster then it takes to run 2 charges. TP recommended within .01 volts.

(in reply to Magne)
       Post #: 8

RE: How to charge a 10s pack in the field - 5/7/2006 9:23:12 PM   
Neo02



Posts: 270
Joined: 8/20/2003
From: Lugano, SWITZERLAND
Status: offline
quote:

ORIGINAL: Magne
No, not if you charge from the same source battery. The two chargers would just draw half the current each, with the same total current drain from the battery.


My Orbit Microlader 6.3 gets very hot while charging a 10S pack, but barely warm when charging a 5S pack. So I thought that the lost energy in form of heat would be saved and better results achieved (i.e. less voltage drop at the source battery) when charging separately. Still a lot to learn in this world... :-D

quote:

An other reason not to do this: The two chargers would not terminate the charge at exactly the same voltage. Even if they were identical chargers they will be differently calibrated. This will cause imbalance between the two packs when these are connected and discharged in series.
If I charge the two packs as 5s, I always use the same charger (twice), and always let the charger complete the charge cycle. When I charge as 10s, I often terminate the charge cycle before it is finished. (90-95% fully charged after 1 hour.) Just my opinion.


Thanks for the clarification. Do you think this will also be a problem when balancers are used? I plan (planned) on buying 2 separate chargers and charge my 10S packs as 2 times 5S packs, both hooked up to a Hyperion LBA6 5S balancers. This should ensure that both packs are at the same voltage when fully charged, or not?

Regards,
-Fabrizio


_____________________________

Fabrizio Albonico
SUI 36291

(in reply to Magne)
       Post #: 9

RE: How to charge a 10s pack in the field - 5/7/2006 10:42:20 PM   
Magne


 

Posts: 333
Joined: 3/7/2004
From: Moss, NORWAY
Status: offline
quote:

This should ensure that both packs are at the same voltage when fully charged, or not?


Hello Fabrizio.

No, strictly speaking it will not.
It will ensure that the voltage is similar for all the cells in each of the two packs, but the two packs may still be slightly different.
It is however quite possible that this is a theoretical problem only, and that in reality it represents no problem at all. I don't really know, but I would guess that as long as the packs are not discharged too low, then all should be fine. See also "rm"'s reply above, this is a procedure I have never tried.
I use Thunder Power batteries, and now always charge as 10s, with the TP 210 balancer.

Magne

(in reply to Neo02)
       Post #: 10

RE: How to charge a 10s pack in the field - 5/13/2006 9:52:30 PM   
Sprink



Posts: 2236
Joined: 4/23/2003
From: London, UNITED KINGDOM
Status: offline 		I charge mine as 2 5s packs, mainly because I only have the 5s TP balancer, so dont trust charging as well as discharging in 10s configuration. By letting the charge cycle to complete, I beleive that the voltage is close enough for how I am using them, I avoid over discharging, usually in the 50%-70% discharge range.

_____________________________

"If it doesn't break, it is probably too heavy"

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RE: How to charge a 10s pack in the field - 5/14/2006 12:20:20 AM   
Adamg-RCU



Posts: 722
Joined: 4/22/2003
From: Saskatoon, SK, CANADA
Status: offline 		Sprink, we should talk ;> I can make you a deal on the TP 210V.

-Adam

(in reply to Sprink)
       Post #: 12

RE: How to charge a 10s pack in the field - 6/5/2006 4:30:19 AM   
tuan lam


 

Posts: 32
Joined: 4/19/2006
From: sugaland, TX, USA
Status: offline 		any one used TP- 1010 CHARGE and TP 210 balancer ?? can you tell me how it set up and the charger mode, when it ned to be charge with balancer and how ?? thanks

tuan

(in reply to Adamg-RCU)
       Post #: 13

RE: How to charge a 10s pack in the field - 3/19/2007 3:40:38 PM   
kmp647


 

Posts: 77
Joined: 11/18/2004
From: marshall, VA, USA
Status: offline
quote:

ORIGINAL: tuan lam

any one used TP- 1010 CHARGE and TP 210 balancer ?? can you tell me how it set up and the charger mode, when it ned to be charge with balancer and how ?? thanks

tuan


How about this for a field charging system: its a small 4 stroke 2.5 hp motor linked to a 55amp bosch alt. with reg and amp meter ,, hook it to a small field battery

small , quiet, up to 55 amps at 12/14 volts

is it any better than a 1kw gen with an iota PS unit?



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(in reply to tuan lam)
       Post #: 14

RE: How to charge a 10s pack in the field - 8/25/2007 4:52:24 AM   
MarkGrabowski


 

Posts: 114
Joined: 11/11/2004
From: addison, IL, USA
Status: offline 		Where did you find the generator posted in the photo?

(in reply to kmp647)