Platinum Lipo
#558
Tech Elite
iTrader: (4)
SO at full charge they are never above 7.4 volts because of there charge characteristics? LipOs dont get "peaked" before runs because they dont accept it correct? So for a 5minute race they would probably start off lower then nihm but hold a straighter voltage curve for the duration of the race?
Again without data from what your saying they may be on average the same as a nihm for a 5 minute duration? Start off lower end higher vs start off higher end lower...
ITs definatly intresting.
I wonder how the motorcross guys got 250 4-stroke to run with 125 2-stroke?
Again without data from what your saying they may be on average the same as a nihm for a 5 minute duration? Start off lower end higher vs start off higher end lower...
ITs definatly intresting.
I wonder how the motorcross guys got 250 4-stroke to run with 125 2-stroke?
#559
Tech Adept
Here is the picture from Car Action
#560
Tech Elite
Join Date: Mar 2004
Location: MOOD;; feeling good not racing ,saving shed loads of money,lovely Tan i have aswell
Posts: 4,762
Originally Posted by Joel Lagace
SO at full charge they are never above 7.4 volts because of there charge characteristics? LipOs dont get "peaked" before runs because they dont accept it correct? So for a 5minute race they would probably start off lower then nihm but hold a straighter voltage curve for the duration of the race?
?
?
when the peak/orion pack is charging it is ticking over around 8.0+ volts it only goes up to 8.4 then stops & by then the pack is only taking 1.5a charge
nimh pack got out on track with around 8.8 volts (peaks of around 9.2 ) so really the c-cells are the ones that are using misreading peak volts umlike the li-po it stay`s @ 7.4 for the duration much longer
if peak redone the 7.4 to 7.2 to keep the munbers game right will it still be passed in the rule`s , i think not rule makers will come up with some thing to stop it being legal wrong colour,to big ,to simple,to easy to look after Blah Blah Blah
#561
Originally Posted by R40Victim
We just allow them, because the only time we noticed a difference is near the end of a run, where all the Nimhs have started to fall off. They're actually slower the 1st minute or two...when the Nimh packs are all freshly charged and kickin out high voltage.
#562
Tech Elite
Join Date: Mar 2004
Location: MOOD;; feeling good not racing ,saving shed loads of money,lovely Tan i have aswell
Posts: 4,762
aldershot club in UK allow peak li-po now (in 19t spec class only)
so that means i have 4 clubs i can use this grey box at
so that means i have 4 clubs i can use this grey box at
#563
Originally Posted by R40Victim
We just allow them, because the only time we noticed a difference is near the end of a run, where all the Nimhs have started to fall off. They're actually slower the 1st minute or two...when the Nimh packs are all freshly charged and kickin out high voltage.
#564
Tech Champion
iTrader: (4)
LiPo's can feel soft early in a run because they don't really get hot during charging. Like all batteries the internal chemical reaction is more efficient at higher temperatures (to a point).
The high level airplane guys use heating pads on a low setting (what people with back injuries use) to pre-warm packs before flights in cold weather.
This same concept applies to NiMh cells during charging. If the cells are cold their IR's get high and voltage is poor. This is why charging packs on a fan is bad and why Much More Makes a Warming Tray for charging in cold weather.
Note I said pre-warm NOT pre-heat. The packs only need to be around 95degF to get the warming benefit
The high level airplane guys use heating pads on a low setting (what people with back injuries use) to pre-warm packs before flights in cold weather.
This same concept applies to NiMh cells during charging. If the cells are cold their IR's get high and voltage is poor. This is why charging packs on a fan is bad and why Much More Makes a Warming Tray for charging in cold weather.
Note I said pre-warm NOT pre-heat. The packs only need to be around 95degF to get the warming benefit
#565
Originally Posted by MR JOLLY
aldershot club in UK allow peak li-po now (in 19t spec class only)
so that means i have 4 clubs i can use this grey box at
so that means i have 4 clubs i can use this grey box at
They are also allowed in 2wd Electric class with 27t Stock, my F103GT nearing completion although this will only be the 2nd class car as my Nitro car is the main car.
#566
Tech Regular
SLCC
So for the SLCC, we can use in practice
#567
Tech Fanatic
iTrader: (11)
Originally Posted by LasagnaCat
No issues running them that way? The battery instructions recommend not running the pack below 6 volts, while that cutoff takes it down to 5.3v per pack using the default setting.
#568
Regional Moderator
iTrader: (9)
Just to pull everyone away from the 'fun' issue of legality and intergration for a second...
Did anybody else see the technology section of CNN today? While talking about the ever increasing gas prices, they did some coverage on a new line of Lithium powered cars. What does that have to do with this thread???
Well those cars were powered by Lithium batteries made by....who else.....Kokam. The same company that makes our packs for Orion/Peak.
Considering there are still people who think you can't even use these packs outside during the summer, hopefully a couple of them caught that little section on CNN. And maybe, just maybe the fact that these cells will soon be used in full sized cars will show people that they are more than safe enough to be used in our 1/10 cars.
Did anybody else see the technology section of CNN today? While talking about the ever increasing gas prices, they did some coverage on a new line of Lithium powered cars. What does that have to do with this thread???
Well those cars were powered by Lithium batteries made by....who else.....Kokam. The same company that makes our packs for Orion/Peak.
Considering there are still people who think you can't even use these packs outside during the summer, hopefully a couple of them caught that little section on CNN. And maybe, just maybe the fact that these cells will soon be used in full sized cars will show people that they are more than safe enough to be used in our 1/10 cars.
#570
Tech Addict
iTrader: (4)
Originally Posted by R40Victim
Glad somebody else saw it, I thought I was the only guy on the planaet who did...