RunRyder - ion batteries

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e-Miniature Aircraft Furion - Razor - Ion-X > ion batteries

Real Raptors
Senior Heliman
Location: UK

can someone help witha question?
i have 1 set of thunder power batteries for my ion, which have only had 2 cycles through them, but having just charged them for flying tomorrow, them have different voltages, batt 1 is 19.22 and batt 2 is 19.39, is this a problem? as ive read that they need to be within 0.01 of a volt so every thing is balanced,

thanks in advance andy

07-16-2004 Over year old.

Spitz
Senior Heliman
Location: UK

No problem for flying, but that could cause a problem if you wanted to charge them in series.

I've been monitoring my battery voltage since my first cycle. I find the packs are always within a few hundred mV each time, never exactly the same.

One thing I have noticed is the consistency of the packs so far. I must have 20 charges, and I get the exact same flying time, and end voltage.

07-17-2004 Over year old.

d_wheel
Veteran
Location: Deep in the heart of Texas.

Cold solder connection on Ion battery harness

Andy, your packs are not fully charged. If you are getting these readings after charging, something is very wrong.

Tony, I am afraid that your understanding of series circuits is not correct. A high resistance at any point in a series circuit, including a cold solder connection on one of the battery connectors, will effect both batteries equally and would not cause one pack to discharge faster or slower than the other. If the Ion packs were in parallel, your description might be correct.

Later;

D.W.

Gettin old aint for sissies!

07-17-2004 Over year old.

Real Raptors
Senior Heliman
Location: UK

im using a schulze chamaleon 636 charger, set on lipo, 5 cells and charging at 8 amps, should i try charging again to see if the getup to the 20+ volts?

andy

07-17-2004 Over year old.

d_wheel
Veteran
Location: Deep in the heart of Texas.

no , your backwards there dude

Sorry Tony, but you are the one that is backwards. You need to become more informed regarding series/parallel circuits.

Andys, A good charger, that is properly set up, will fully charge the packs regardless if you are charging at 6 or 8 amps. 6 amps will just take a bit longer. If you are not in a hurry, it is a little easier on the batteries to charge at a lower rate. I believe the Schulze has a timer that will terminate the charge after a set time, even if has not fully charged the pack. This might be why your packs are not full. I would read the instructions for the charger VERY carefully and then charge the packs again. Probably at a lower rate, say 3 amps. Watch the voltage carefully. It should slowly rise until it reaches 21 volts, then remain constant at that level while the current starts to lower slowly. Don't worry about how long it takes. When charging at home, I use 4 amps and it sometimes takes 3 hours to complete the charge. My charger drops to around .05 amps just before it terminates the charge.

Later;

D.W.

Gettin old aint for sissies!

07-17-2004 Over year old.

Real Raptors
Senior Heliman
Location: UK

am i ok to fly with the 2 batteries in there present condition? ie out of balance, and ill check the timer on my charger

07-17-2004 Over year old.

Skippy
Senior Heliman
Location: Flint, MI USA

Andy,

One thing that will terminate the charge is having the mAH set to low. When charging mAH should be set to at least 7000 if you have 7600 or 8000 batteries. I just set it a 9999, when doing this it will only look a voltage and not capacity. If you have any more questions just send me a PM.

Went all Electrons, No more mess

07-17-2004 Over year old.

d_wheel
Veteran
Location: Deep in the heart of Texas.

No. Don't fly them. Wait until you have a full charge. A little waiting might save you a good deal of money. It might not hurt them, but then again it could. Skippy seems to know about your charger. Listen to his advise.

Later;

D.W.

Gettin old aint for sissies!

07-17-2004 Over year old.

Real Raptors
Senior Heliman
Location: UK

are the settings you are listing for use with a schulze chamaleon 636?
as i dont have the 9999 you list for auto charging, is this corect for the charger

Charge quantity is after the number of cells in the menu. So after powering on the charger, press both + and - keys, then release the - key first, then +.

display should say LiPo.
press -
display should say cell count (5)
press -
display should say max charge quantity
press + set to 7600 press - one more time
display shows 5LIPO#GO#I=8.0A

is this correct?

andy

07-17-2004 Over year old.

d_wheel
Veteran
Location: Deep in the heart of Texas.

d_wheel, I stand by what I said

In that case there is no need to continue this dialogue. This will be my last message about the subject. I know I am correct and do not feel the necessity to prove anything. You simply don't understand how a series circuit works.

I am not saying you can't have a miss-matched set of packs when connected in series. Of course you can. I am saying that a cold solder connection, or any other form of resistance in the harness, will simply limit the amount of current available from the packs. It will not effect one pack any more than the other, regardless of its location.

If you are going to continue answering questions about electronics, let me suggest that you take a course on the subject, or simply do a search on the internet. I just did, and it resulted in almost 1.5 million hits. I feel sure that among them you will be able to find enlightenment.

Later;

D.W.

Gettin old aint for sissies!

07-18-2004 Over year old.

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e-Miniature Aircraft Furion - Razor - Ion-X > ion batteries

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