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Electric Battery-Charger-pSupply
› lipo charging with balance plug
01-04-2010 02:22 AM  7 years agoPost 1
Mojave

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Palos Verdes, Ca. USA

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I have 2 BC6 lipo charger/balancers, but I want a charger that will allow me to charge and balance my lipos through the balance plug only. This way I maintain a perfectly balanced pack VS charging through the deans and balance port at the same time. Does anyone know of an affordable charger that fits this description? My BC6 won't allow me to charge the pack that way. My bud has the Align unit, but they are $180 each and I want to buy 4 units.

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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01-04-2010 02:43 AM  7 years agoPost 2
TJinGuy

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Socorro, NM - USA

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That is not a good idea. It is far better to charge through the deans and balance through a separate connector. With the exception of the Cellpro 4S, all other balance port chargers simply connect to the outer wires for the pack POS and NEG, and then balance through the other wires. Hence it is no different than using 2 individual connectors but you only have one connection. It sounds great but it is not because most of those little wires are rated for like 2A. So you really should not charge at higher than 2A through these connectors. FMA says they are good for 4A but trust me, they get awful warm doing that.

What you have now should work very well. What is you problem with it?

- Chris

Team New Mexico
TJinTech

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01-04-2010 03:10 AM  7 years agoPost 3
Mojave

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Palos Verdes, Ca. USA

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Thanks for the info. I was told that when you balance charge the pack while using the deans and balance plug in tandem, you are not truely balancing the pack efficiently. Due to the bulk of the current is being supplied through the deans plug, which is charging in series through the first cell to the second, third... I'm not an electronics genius, so I don't know if this is true or not. Plus, if you have a lagging cell, you can bring it up by itself. Correct me if I'm wrong.

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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01-04-2010 03:34 AM  7 years agoPost 4
TJinGuy

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Socorro, NM - USA

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Ok again almost all, including the Align chargers, are charging the pack just like your BC6 chargers. The only difference it that they are using only one connector. They are charging the pack in series and discharging the individual cells all through the balance wires. This is how all the Align chargers work (from what I understand), they are just using the outer wires on the balance connector as the "deans" connection. The only charger that I have ever heard of that does not do this is the Cellpro 4S. It actually charges each cell independently with 4 single cell chargers in one box.

Regardless there is no benefit to charging like this. Trust me when I say your BC6 chargers are better than anything Align sells.

- Chris

Team New Mexico
TJinTech

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01-04-2010 05:14 PM  7 years agoPost 5
kcordell

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O Fallon, MO

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The Electrifly packs, when they first came out were "charge thru the balance connector only". I know of one person who called Great Planes and asked about charging thru the deans and was told "we're not responsible IF anything happens", then they come out with a new line of batteries and "balance thru balance connector, charge thru deans". Not sure what may have changed, but ideas sure did. Why would there be an issue charging thru balance connector? It is connected straight to the individual cells.

Team Futaba, Team Synergy/Rail, Team Scorpion, Team Castle Creations, YS Engines, VelTye

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01-04-2010 06:00 PM  7 years agoPost 6
TJinGuy

rrProfessor

Socorro, NM - USA

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Most all chargers that charge through the balance connector are just using the outer 2 wires to charge the pack in serial, just like using a deans. Because of this, you can't charge at high rates (rates above 2A). Who wants to be limited to charging at 2A?

- Chris

Team New Mexico
TJinTech

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01-04-2010 06:15 PM  7 years agoPost 7
Mojave

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Palos Verdes, Ca. USA

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I understand what you are getting at. Only one issue: My buddy had a low cell and burned his garage to the ground. The resistance going through the bad cell threw the whole process off kilt and overcharged the first cell.
If you have a low cell and are able to segregate it and bring it up to par with the other cells, your lipo may live another to fly another day. So, lets say that you go on charging the pack normally through the deans and the balance plug, but you still have a cell that is lagging behind at lets say 3.8 volts. Wouldn't you want to charge only that cell to help bring it up to the level of the other 5? Food for thought.

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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01-04-2010 06:32 PM  7 years agoPost 8
TJinGuy

rrProfessor

Socorro, NM - USA

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Yes that would be handy but none of the current chargers (save for the Cellpro 4s) do this regardless of what connectors they have on them. They just do this internally

But it does not matter. Any good charger will not allow the pack to get that far out of whack. If there is a way low cell then it will adjust accordingly.

- Chris

Team New Mexico
TJinTech

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01-05-2010 03:32 AM  7 years agoPost 9
Mojave

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Palos Verdes, Ca. USA

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Gotcha. Thanks for the heads up and taking the time to draw the diagram.

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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01-09-2010 07:50 AM  7 years agoPost 10
Paul Woodcock

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Dubai - United Arab Emirates

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Hi guys

The charge wires and outer 2 wires of the balance wires end up in the same place INSIDE the battery. ie directly on the cells.

The 'old' stand alone balancers had issues where they could not handle the high charge rates and could theoretically end in an out of balance situation.

The 'new' charge-through balancers, like flight power, and internal balancer chargers will reduce or terminate the charge if the balance situation is out of control.

Regards
Paul

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01-09-2010 02:05 PM  7 years agoPost 11
Mojave

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Palos Verdes, Ca. USA

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Paul, so you're saying that you can charge the pack through the balance plug only, but possibly at a lower rate? My idea was to charge the pack through the main leads and the balance plug, then finish the charge/balance through the balance plug only, at a lower amperage.

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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01-09-2010 03:26 PM  7 years agoPost 12
TJinGuy

rrProfessor

Socorro, NM - USA

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My idea was to charge the pack through the main leads and the balance plug, then finish the charge/balance through the balance plug only, at a lower amperage.
Why? That would not be useful in any way. There is no benefit to charging in that manor.

What are you actually trying to achieve?

- Chris

Team New Mexico
TJinTech

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01-09-2010 07:51 PM  7 years agoPost 13
Mojave

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Palos Verdes, Ca. USA

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Just trying to achieve better balancing between the cells. Trying to keep a low cell from ruining a good pack etc.. I have a couple of 6S packs that have a cell that lags behind by .5 volt. If I could charge this cell seperately, I may be able to get better performance and longer life out of the pack. This is what a buddy of mine does with his align charger. Is this not a good idea? As I stated before, I am not an electronics expert, just learning as I go.

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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01-09-2010 08:20 PM  7 years agoPost 14
TJinGuy

rrProfessor

Socorro, NM - USA

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As I have stated before, your Bantam BC6 is an excellent charger and better than anything Align markets. If used correctly it will maintain your packs as well, or better, than the Align chargers. If you have a lipo with a cell .5V off from the others and you are charging it properly on any good charger, that lipo is bad.

- Chris

Team New Mexico
TJinTech

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01-09-2010 10:49 PM  7 years agoPost 15
Mojave

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Palos Verdes, Ca. USA

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OK. I wasn't comparing the quality of Align VS Bantam, just trying to find a better way to balance the cells and maybe save a couple of lipos. Guess I'll just gut the packs and make something else out of them. Thanks for the info.

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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01-10-2010 10:17 AM  7 years agoPost 16
Paul Woodcock

rrElite Veteran

Dubai - United Arab Emirates

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Hi

I would not bother trying to charge through the balancer plug.

In my experience, the cell balance very quickly. and stay balanced through the entire charge.

If they don't, the pack is probably not very good, or you are not actually using the charger correctly.....

Regards'
Paul

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01-10-2010 06:57 PM  7 years agoPost 17
Mojave

rrElite Veteran

Palos Verdes, Ca. USA

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No, I'm using the charger correctly. I just have a low cell in a couple packs that I wanted to save. I balance charge all my packs and have had great luck with my lipos so far. I just thought there might be a better mouse trap Evidently I'm a better fabricator/builder than an electrician...

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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01-10-2010 07:04 PM  7 years agoPost 18
TJinGuy

rrProfessor

Socorro, NM - USA

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Assuming that a charger/balancer is working properly ... a lipo can not be saved with a charger. Lipos are chemical devices and once they start to degrade, it is only down hill from there. It is not like NiCds where they age and begin to fail but can be partially resurrected by cycling them.

- Chris

Team New Mexico
TJinTech

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01-10-2010 07:28 PM  7 years agoPost 19
bowies12

rrApprentice

Surrey - UK

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QUOTE >>OK. I wasn't comparing the quality of Align VS Bantam, just trying to find a better way to balance the cells and maybe save a couple of lipos. >>
.
.
.
Why is it that you think the Bantam cannot properly balance cells on a charge?

The Bantam will correctly balance a lipo pack as it charges. End of story. Thats why there is a balance lead. (assuming you have selected "Balance" in the programming.) There is no better way!
If 1 cell is duff the Bantam will recognise the situation and terminate the charge. (eg. over voltage, under voltage etc. etc.)

A good condition Lipo pack will have all cell voltages quite close together.

If for any reason 1 cell is very different then there is a problem. There is no way to "save" the pack. Its knackered. Its probably been over discharged sometime in the past or is a cheap pack or just old or charged too quickly etc. etc..

I know some people take out the duff cell and re-use the others but its not advisable.

Trust in your Bantam. Read the manual again and find out its capabilities. You will surprise yourself.

Fat birds can't fly

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01-11-2010 02:52 AM  7 years agoPost 20
Mojave

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Palos Verdes, Ca. USA

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Dude, no insult intended, but I know how to use my charger. My only sin is not being an electrical guru. I can read instructions and I've been using the charger for over 3 years now. I just didn't understand lipo chemistry and how the balance plug actually gets the job done. If the entire pack charges through the series connector (deans plug), then the voltage goes from cell 1 to cell 2 to cell 3... So that being said, what does the balance plug actually do? Does it slowly drain the high cells while the low cells charge, then even them out, ie; top them off? And if so, how does it bypass the main charging leads without interupting the flow through the individual cells?

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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