new battery questions
#1
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new battery questions
So I have ordered new batteries for my vanquish build. They should be here Tuesday or Wednesday and my plan is to maiden the plane Friday and then go to a contest on Saturday.
I understand the need to break the packs in first, so I would like to do that via my hitec x4.
So what charge and discharge rates should I use for breaking-in the packs?
And after break in, what charge rates should I use?
The packs are turnigy 5s 5000 mah 20c.
Thanks
Tony
I understand the need to break the packs in first, so I would like to do that via my hitec x4.
So what charge and discharge rates should I use for breaking-in the packs?
And after break in, what charge rates should I use?
The packs are turnigy 5s 5000 mah 20c.
Thanks
Tony
#2
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RE: new battery questions
Tony! I am not too convinced about discharging a pack for run-in purposed on your charger. Usually the discharge rate is quite low. So instead for your first charges use 1C and fly the first few flight some lazy trim lines for max 5 minutes, so you don't discharge your packs too much.
Look at the other thread where a guy got a LiPo fire. Check if possible during charging the cell voltage of your individual cells. Are they well aligned? Couple of decimal 0,01's difference is OK but not too much. Also after charging check your Ir per cell. Then after flight before you charge us the monitor function on your charger to have a look at the voltage per cell. They should be pretty close.
Volkert
Look at the other thread where a guy got a LiPo fire. Check if possible during charging the cell voltage of your individual cells. Are they well aligned? Couple of decimal 0,01's difference is OK but not too much. Also after charging check your Ir per cell. Then after flight before you charge us the monitor function on your charger to have a look at the voltage per cell. They should be pretty close.
Volkert
#3
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RE: new battery questions
Charge at 1C, discharge a few flights with no real verticals, maybe 5min. I was not the best about doing this and my packs have suffered. The ones I treated gingerly at first seem to have better power, last longer, and stay hard.
I'm not sure about charger dis-charging - I guess I don't fully understand battery technology. My understanding was that the first few cycles done slowly help the electrons to bond to what they are supposed to. For example, if you over-discharge a pack, the electrons will start bonding with their surroundings and eating away at the battery (this is what happens over time anyway, all batteries corrode with time). So my thought was that the slow discharge ensures there is no drastic change and electrons are not fleeing for the nearest opposite charge. So to me it would make sense that the discharge function of a charger would be sufficient.
that being said, I'm not sure if there are other benefits/advantages to discharging at a higher rate like 5C or something.
I'm not sure about charger dis-charging - I guess I don't fully understand battery technology. My understanding was that the first few cycles done slowly help the electrons to bond to what they are supposed to. For example, if you over-discharge a pack, the electrons will start bonding with their surroundings and eating away at the battery (this is what happens over time anyway, all batteries corrode with time). So my thought was that the slow discharge ensures there is no drastic change and electrons are not fleeing for the nearest opposite charge. So to me it would make sense that the discharge function of a charger would be sufficient.
that being said, I'm not sure if there are other benefits/advantages to discharging at a higher rate like 5C or something.
#4
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RE: new battery questions
For break-in, just fly the plane at about half throttle 2-3 times. Do not have to worry about the discharge current.
I charge my 5s 5000mah 20c Turnigy packs at 1C (i.e., at 5000ma or 5A). It is OK to charge at less than 1C but the charge time will be longer.
I charge my 5s 5000mah 20c Turnigy packs at 1C (i.e., at 5000ma or 5A). It is OK to charge at less than 1C but the charge time will be longer.
#5
RE: new battery questions
I use a cellpro pl8 to break in my packs. I charge 2 packs in parallel at 1C then discharge the 2 packs in parallel at 1C down to storage charge. I cycle this way 5 times. I have had good luck with this method.
#6
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RE: new battery questions
ORIGINAL: shepga
I use a cellpro pl8 to break in my packs. I charge 2 packs in parallel at 1C then discharge the 2 packs in parallel at 1C down to storage charge. I cycle this way 5 times. I have had good luck with this method.
I use a cellpro pl8 to break in my packs. I charge 2 packs in parallel at 1C then discharge the 2 packs in parallel at 1C down to storage charge. I cycle this way 5 times. I have had good luck with this method.
#7
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RE: new battery questions
On the Cellpro charger (at least the 10XP), they will only discharge at 1.0 Amp, not 1C (which would be 4-5 Amps). Not positive about the PL8 as Glen suggests.
I agree with most...fly the packs 4-6 flights not exceeding 1/2 throttle down to about 50%. I usually set the timer for 4:30 minutes and land at the timer. I'm usually around 50-56%. Repeat for the breakin flights and everything will be fine.
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RE: new battery questions
I am charging and discharging at 0.5C for 5 times. Is this OK, especially for discharging? Will this "wake" the chemistry of the battery?
cheers
#9
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RE: new battery questions
ORIGINAL: smcharg
On the Cellpro charger (at least the 10XP), they will only discharge at 1.0 Amp, not 1C (which would be 4-5 Amps). Not positive about the PL8 as Glen suggests.
On the Cellpro charger (at least the 10XP), they will only discharge at 1.0 Amp, not 1C (which would be 4-5 Amps). Not positive about the PL8 as Glen suggests.
PL8 Selectable Discharge specs:
•Internal discharge 10mA to 10A, 100W max.
•Regenerative discharge 10mA to 40A, 1344W maximum when powering the PowerLab 8 from a Lead Acid battery.
So on a 21v pack, internal discharge rate is up to about 4.7A.
jeff
#10
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RE: new battery questions
ORIGINAL: Jeff Worsham
Hi Scott-
PL8 Selectable Discharge specs:
•Internal discharge 10mA to 10A, 100W max.
•Regenerative discharge 10mA to 40A, 1344W maximum when powering the PowerLab 8 from a Lead Acid battery.
So on a 21v pack, internal discharge rate is up to about 4.7A.
jeff
ORIGINAL: smcharg
On the Cellpro charger (at least the 10XP), they will only discharge at 1.0 Amp, not 1C (which would be 4-5 Amps). Not positive about the PL8 as Glen suggests.
On the Cellpro charger (at least the 10XP), they will only discharge at 1.0 Amp, not 1C (which would be 4-5 Amps). Not positive about the PL8 as Glen suggests.
PL8 Selectable Discharge specs:
•Internal discharge 10mA to 10A, 100W max.
•Regenerative discharge 10mA to 40A, 1344W maximum when powering the PowerLab 8 from a Lead Acid battery.
So on a 21v pack, internal discharge rate is up to about 4.7A.
jeff
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RE: new battery questions
Ooor, you could discharge them singularly, as the readings from each cell will be accurate, rather than an average.
It may take more time but you can hang your hat on each cell doing as it should.
It may take more time but you can hang your hat on each cell doing as it should.
#13
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RE: new battery questions
ORIGINAL: Rendegade
Ooor, you could discharge them singularly, as the readings from each cell will be accurate, rather than an average.
It may take more time but you can hang your hat on each cell doing as it should.
Ooor, you could discharge them singularly, as the readings from each cell will be accurate, rather than an average.
It may take more time but you can hang your hat on each cell doing as it should.
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RE: new battery questions
I personly break in a 2 x 5S pack as follow with the Junsi 4010:
* charge 4 times at 1C to 4.15 a cell
* discharge 4 times at 6C
Charge and discharge at 1C wil not get the chemistry going!
Gr Frank
* charge 4 times at 1C to 4.15 a cell
* discharge 4 times at 6C
Charge and discharge at 1C wil not get the chemistry going!
Gr Frank
#15
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RE: new battery questions
Well first I never charge my battery faster then 1C (most of mine are good for 8C+) and to discharge them quicker when new I do them one at the time at 10A (max rate)so 2C or better depending on the battery size.
All that said I'm not sure of what make a battery last longer, I just know what make the battery fail quickly
All that said I'm not sure of what make a battery last longer, I just know what make the battery fail quickly
#16
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RE: new battery questions
http://batteryuniversity.com/learn/a...charge_methods
Discharge Signature
A classic discharge is a battery that delivers a steady load at, say, 0.2C.
A classic discharge is a battery that delivers a steady load at, say, 0.2C.