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Old 08-01-2013, 06:22 PM   #406
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Has anyone found if there is an advantage to charging at 20+ amps and and discharging at the same rate or higher than what the average Joe is doing when charging between 7-10 amps? I know it charging at a high rate will charge a lot quicker, but what is the overall power advantage of doing that?

Which charger are people using that charges at a high rate and also a great charger? What I currently have is a TP 610.
Yes, HUGE drop in IR and the lipos don't get HOT! Last longer.

I dump my 10 amp charger and bought a new one with a new power supply.

Go back and read back on a earlier post.
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Old 08-01-2013, 06:31 PM   #407
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Has anyone found if there is an advantage to charging at 20+ amps and and discharging at the same rate or higher than what the average Joe is doing when charging between 7-10 amps? I know it charging at a high rate will charge a lot quicker, but what is the overall power advantage of doing that?

Which charger are people using that charges at a high rate and also a great charger? What I currently have is a TP 610.
the only things my understanding is ,the higher rate charge can sometime reduced the IR ,which can help produce batteries power flow...
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Old 08-26-2013, 07:18 PM   #408
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If you charged at 30 amps and waited 6 hours before racing the packs, will you still have the advantages of the lower IR?
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Old 08-26-2013, 07:33 PM   #409
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If you charged at 30 amps and waited 6 hours before racing the packs, will you still have the advantages of the lower IR?
Yes, but..... the Voltage will be the problem...
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Old 08-26-2013, 07:43 PM   #410
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I'm sure that I will get flamed for this...

If not the last run for the day then
1. Charge Lipo over 20amps
2. Run
Else
Put charger in Storage mode and run on the Lipo until done
Put up the battery until next time you run
This whole Discharging will only shorten the life of the battery. My source is known as an RC God.

Ok so let the flaming start...
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Old 08-26-2013, 07:48 PM   #411
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Been charging at 20A for like over 3 years now and i am still some first and 2nd gen Lipos
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Old 08-26-2013, 09:09 PM   #412
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If you charged at 30 amps and waited 6 hours before racing the packs, will you still have the advantages of the lower IR?
Besides the voltage being lower from sitting for hours, the whole thought behind a lower IR from high amp charging was that the pack will have more heat in it.
Let it sit for hours... or even too many minutes and the pack is back to room temperature.
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Old 08-26-2013, 09:24 PM   #413
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Originally Posted by bvoltz View Post
I'm sure that I will get flamed for this...

If not the last run for the day then
1. Charge Lipo over 20amps
2. Run
Else
Put charger in Storage mode and run on the Lipo until done
Put up the battery until next time you run
This whole Discharging will only shorten the life of the battery. My source is known as an RC God.

Ok so let the flaming start...

No flaming from me but if we assume a set number of cycles till the packs dead...

Didn't get the first step of else category, set to storage... but run the pack down?

If your going to run the pack down instead of storage charging a pack that didn't get used at the end of the day... you still discharged it and used up one cycle.
If you use it and leave it flat... that from many sources is not good for a pack over more than a few days. So you charge it back up to storage.
You just used 1/2 more cycle than taking to storage didn't you?

There are soooo many variables in measuring what's good for a pack and what's not, not sure anyone can really say if it was bad or not. Danny @ SMC (and others I'm sure) has run repeated control tests on packs and I think that's the only real way to get an idea. Roughly the same temps, discharge to a set voltage at a set discharge rate, charge to a set rate. How many cycles?
Now you have your control number.
Now repeat with another pack as close to the same as you can find out of the batch and charge it up to the same voltage and cycle it the same amount of times for that day as your control test and leave it flat for the night.
Now how many cycles did you lose?

But to compare a thunder power (or whatever) that you used in the winter to a nanotech (or whatever) in the summer with a gang of other variables thrown in... not sure how we can really say. I know I wouldn't put the effort into logging all of the data and certainly wouldn't buy two packs to burn through to get an answer with a controlled system of measuring. Not to mention I want to drive... not test packs
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Old 08-26-2013, 10:02 PM   #414
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step one and two make me think we are in a nicad time warp
Quote:
Originally Posted by bvoltz View Post
I'm sure that I will get flamed for this...

If not the last run for the day then
1. Charge Lipo over 20amps
2. Run
Else
Put charger in Storage mode and run on the Lipo until done
Put up the battery until next time you run
This whole Discharging will only shorten the life of the battery. My source is known as an RC God.

Ok so let the flaming start...
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Old 08-27-2013, 05:49 AM   #415
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No flaming from me but if we assume a set number of cycles till the packs dead...

Didn't get the first step of else category, set to storage... but run the pack down?

If your going to run the pack down instead of storage charging a pack that didn't get used at the end of the day... you still discharged it and used up one cycle.
If you use it and leave it flat... that from many sources is not good for a pack over more than a few days. So you charge it back up to storage.
You just used 1/2 more cycle than taking to storage didn't you?

There are soooo many variables in measuring what's good for a pack and what's not, not sure anyone can really say if it was bad or not. Danny @ SMC (and others I'm sure) has run repeated control tests on packs and I think that's the only real way to get an idea. Roughly the same temps, discharge to a set voltage at a set discharge rate, charge to a set rate. How many cycles?
Now you have your control number.
Now repeat with another pack as close to the same as you can find out of the batch and charge it up to the same voltage and cycle it the same amount of times for that day as your control test and leave it flat for the night.
Now how many cycles did you lose?

But to compare a thunder power (or whatever) that you used in the winter to a nanotech (or whatever) in the summer with a gang of other variables thrown in... not sure how we can really say. I know I wouldn't put the effort into logging all of the data and certainly wouldn't buy two packs to burn through to get an answer with a controlled system of measuring. Not to mention I want to drive... not test packs
I'm not sure I'm following you...

If you are at the track and running, you charge then run the pack.... If you are done for the day after your last run, you take the battery down to storage mode, if you not going to use it for a week or more. If you are going to use the next day, then do nothing after your 6 min run, just put it up. Most the time after a 6 min run, the storage mode will only take a little more out the battery, another option is to run it 7 mins then just put it up... (this will make the voltage also most the same level as storage mode...)

Did that clear it up?

A number of people are saying here to discharge below the 7.6 area of storage mode, this is not good for Lipos. If you choose to use the discharge method that is your call. What I'm saying is that it will hurt your lipos, and this comes directly from what we all know as an RC god with many hours of testing these different methods.... But in the end it is your call, it is your lipo and your money...
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Old 08-27-2013, 05:54 AM   #416
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step one and two make me think we are in a nicad time warp
Na... it is the same as we have been doing, charge and run with Lipos... the charge rate is the difference...
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Old 08-27-2013, 06:20 AM   #417
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Just bought a Powerlab 6 charger and all I can say is WOW! Charging at 25 amps between races and only need a couple of batteries. One of the best purchases I have made.
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Old 08-27-2013, 06:23 AM   #418
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Originally Posted by bvoltz View Post
I'm not sure I'm following you...

If you are at the track and running, you charge then run the pack.... If you are done for the day after your last run, you take the battery down to storage mode, if you not going to use it for a week or more. If you are going to use the next day, then do nothing after your 6 min run, just put it up. Most the time after a 6 min run, the storage mode will only take a little more out the battery, another option is to run it 7 mins then just put it up... (this will make the voltage also most the same level as storage mode...)

Did that clear it up?

A number of people are saying here to discharge below the 7.6 area of storage mode, this is not good for Lipos. If you choose to use the discharge method that is your call. What I'm saying is that it will hurt your lipos, and this comes directly from what we all know as an RC god with many hours of testing these different methods.... But in the end it is your call, it is your lipo and your money...
Ah, got it. Yeah, if I'm driving the following day I don't care as long as its in the area of storage voltage or higher. If I'm not driving till the following weekend, storage charge.
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Old 08-27-2013, 09:33 AM   #419
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Think out side the box.

Everyone here knows whats not good for lipos, but don't understand
how to actually lower IR.

Its not charging just at or over 20 amps.
Its a process.

Lowering IR on a lipo pack has to do with controlled temperature.
Never letting your lipo pack get too hot.

To much heat adds resistance.
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Old 08-28-2013, 11:20 PM   #420
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Think out side the box.

Everyone here knows whats not good for lipos, but don't understand
how to actually lower IR.

Its not charging just at or over 20 amps.
Its a process.

Lowering IR on a lipo pack has to do with controlled temperature.
Never letting your lipo pack get too hot.

To much heat adds resistance.

What is too Hot?

Thanks
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