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Charging LiFe through balance connector

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kaz1104 View Drop Down
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  Quote kaz1104 Quote  Post ReplyReply Direct Link To This Post Topic: Charging LiFe through balance connector
    Posted: 24/May/2012 at 8:13am
Hi,
Simple question (I hope). Charging LiFe batteries through the balance connector only. For Tx batteries especially it is convenient to not have to disconnect and reconnect the power lead.   Not so important for Rx packs as its not so difficult to plug through the switch harness for power in and then to the balance plug.
A multi output charger would be nice so TX and Rx packs could be charged at the same time. Which HobbyKing chargers are capable of doing this?
Thanks in advance,
Mark
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  Quote Daithi Quote  Post ReplyReply Direct Link To This Post Posted: 24/May/2012 at 8:33am
The Eco-6 works well

Microprocessor controlled
Delta-peak sensitivity (NiMH/NiCd)
Individual cell balancing
Li-ion, LiPo and LiFe capable
Ni-Cd and NiMH capable
Large range of charge currents
Store function, allows safe storage current
Time limit function
Input voltage monitoring. (Protects car batteries at the field)
Data storage (Store up to 5 packs in memory)
Battery break in and cycling.

http://www.hobbyking.com/hobbyking/store/__11060__HobbyKing_ECO6_50W_5A_Balancer_Charger_w_accessories.html
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  Quote Sawdust Quote  Post ReplyReply Direct Link To This Post Posted: 24/May/2012 at 8:49am
The only ones I know of that charge through the ballance conector are the Revolectrix Cellpro range of chargers. Hobbyking only carry one at the moment and it's out of stock at the moment but according to the product page it should be back very soon. That one is the Cellpro 10S found HERE. It is a bit expensive but people I know who own them swear by them. You can find that charger elsewhere plus the smaller cheaper Cellpro ones. I won't add a link but if you google it you shouldn't have any trouble.
As for multiple batteries, there's several that do that in the range they carry here. The newest and most powerfull one is THIS ONE HERE. I bought one of those myself recently and so far I'm very happy with it. You can't charge through the ballance conections though.




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  Quote Sawdust Quote  Post ReplyReply Direct Link To This Post Posted: 24/May/2012 at 8:50am
Damn! I type way too slowly .




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  Quote rcmodelreviews. Quote  Post ReplyReply Direct Link To This Post Posted: 24/May/2012 at 8:57am
You can make up a lead that will allow you to charge the battery through the balance port using any normal 4-button charger.
RcModelReviews
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  Quote Sawdust Quote  Post ReplyReply Direct Link To This Post Posted: 24/May/2012 at 9:03am
Oops! I forgot that Cellpro can charge 2 batteries at once so might just be perfect. It's not as flexible as a lot of the others in one way though.
" For Battery types: Lithium Polymer (1s to 10s balanced), Lithium Ion (1s to 10s balanced), Lithium Manganese (1s to 10s balanced), A123 (LiFePO4) (1s to 10s balanced) ".
It's perfect as long as you don't want to charge Nicads or other than the battery types mentioned above.




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  Quote Sawdust Quote  Post ReplyReply Direct Link To This Post Posted: 24/May/2012 at 9:06am
Originally posted by rcmodelreviews.

You can make up a lead that will allow you to charge the battery through the balance port using any normal 4-button charger.
I never even thought of that, brilliant Bruce .
By doing that would that give a decent charger like for example an ICharger all the benefits of a Cellpro?

EDIT: It's a bit dumb of me not to have thought of that because that's exactly what I did myself with a couple of A123 receiver packs I made up a while ago .

Edited by Sawdust - 24/May/2012 at 9:16am




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kaz1104 View Drop Down
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  Quote kaz1104 Quote  Post ReplyReply Direct Link To This Post Posted: 24/May/2012 at 2:49pm
Thanks for the replies guys ... much appreciated. So how would I go about doing this? I have a HK 4 output charger that will do LiFe packs and 3 swallow charger that don't have LiFe listed as an option.
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  Quote flarssen Quote  Post ReplyReply Direct Link To This Post Posted: 24/May/2012 at 3:21pm
Originally posted by kaz1104

Thanks for the replies guys ... much appreciated. So how would I go about doing this? I have a HK 4 output charger that will do LiFe packs and 3 swallow charger that don't have LiFe listed as an option.
Take an extension cable for your type of balance connector. Solder one additional wire to each of the outermost wires of the balance extension. Then add banana connectors to the other ends of the extra wires. Max charge current should be 4A since current will pass through the smaller balance wires/connectors.

           --------------- Banana +
          /
L |--------------| (Balance cable +, red)
i |--------------|
F |--------------|
e |--------------| (Balance cable -, black)
          \
           --------------- Banana -


Fred

Edited by flarssen - 24/May/2012 at 3:24pm
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  Quote Sawdust Quote  Post ReplyReply Direct Link To This Post Posted: 24/May/2012 at 3:42pm
That's the one I made up to suit my purpose. On the flight pack the wire that would normaly be the signal wire but unused on a flight pack goes to the point where the positive of one battery is soldered to the negative of the other battery. The XT60 on the input end is purely a matter of convenience to me. It just means I don't have to change anything at the charger but would be better if anything with banana plugs.




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