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Old 03-01-2005, 08:16 AM   #1
drx
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Default What is "Re-Peaking"

I hear this term bandied about, but it occurs to me that I really don't know what it means. I ran a search, but the number of references to repeaking is huge and nothing I read actually defined re-peaking.

So......

What does it mean to "re-peak" a pack?

Why is it or should it be done?

thanx

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Old 03-01-2005, 08:21 AM   #2
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Repeaking is simply putting it on peak charge again.

If a pack has been standing for a little while, it will have shed a little energy and heat. Batteries tend to work best fresh off the charger, with a little warmth in them, and with the maximum energy from the charge.

So, if you charged the pack the night before, or it finished 30 mins before the race, you may want to repeak it.

Some chargers give you the option to repeak after a set time, as little as 5 minutes. In my opinion, all this will serve to do is overheat the battery without getting any more real energy into it.
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Old 03-01-2005, 08:36 AM   #3
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WOW that was quick!!

Thanx!

Let me spin this a bit to see if I have it right.

Let's say I have some really choice race packs and so "save" them a bit, I charge them the night before the race at a low amperage.

So, when I get to the track, the packs will be charged, but not "warm".

I put them back on the charger and repeak them at, say 5-6 amps, for x minutes to "warm them them up".

Using that plan (if it's not utterly ridiculous to do so), would the "repeaking" take a short time as compared to what it would take to charge a cold, discharged pack at 5-6amps?

Quote:
Originally posted by sosidge
Repeaking is simply putting it on peak charge again.

If a pack has been standing for a little while, it will have shed a little energy and heat. Batteries tend to work best fresh off the charger, with a little warmth in them, and with the maximum energy from the charge.

So, if you charged the pack the night before, or it finished 30 mins before the race, you may want to repeak it.

Some chargers give you the option to repeak after a set time, as little as 5 minutes. In my opinion, all this will serve to do is overheat the battery without getting any more real energy into it.
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Old 03-01-2005, 08:50 AM   #4
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If your charger has peak detection on it...then a "timed" re-peak isn't necessary. Just put them back on the charger and let them do their thing. they will turn off automatically.
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Old 03-01-2005, 08:56 AM   #5
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If you have the ability to charge at 5 or 6 amps, you would be better to charge before you race instead of the night before. 6 amps for 3300 pack is about a 40 min charge.
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Old 03-01-2005, 08:57 AM   #6
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I always re-peak as close to the start of my heat as possible. Even if the pack just finished charging 10 minutes before. The reason for doing this is because the energy stored in the cells "fades" over time so if the battery has sat around for even a short amount of time it will not have as much energy stored in it as it did the moment it came off the charger. When I re-peak it only takes about 5 minutes on my Pulsar charger. That is one reason why I always have two chargers on my pit table.
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Old 03-01-2005, 09:13 AM   #7
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I charge the night before only because when I get to the track...I just want to get rolling. But I re-peak before I hit the track and re-peak at like 7 amps before every practice, qual and main.
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