What i did wrong ? (3 batteries to trash can)
#1
What i did wrong ? (3 batteries to trash can)
Hi guys,
Didnt raced for the last 4 months, now im preparing my cars for the season and took my 3 racing lipo packs (7.4v hardcase roar approved) wich were without usage during 4 months, 2 of them stored on STORAGE mode of charge and the other one 3/4 charged.
The thing is that i put the 3 batts on 3 different chargers at the same time (each one 5.200mah pack, 40c) on balance-charge mode at 2.5amp.
The 3 batts finished the charge no problem,i disconnected them and thats it. Next day morning 3 of them were inflated like triple hamburguers !!! ... they even broke the hardcase off !! ...
So, WHY IN THE HELL this happened ?, im mainly a nitro racer so i can accept that i did something wrong, but i still dont see that really,
Now i have to buy new batts.
I use 11.1v lipo pack on my radio and 14.v pack on my starter box for nitro cars now im afraid to try to charge them too !!
thanks for your time guys,
Didnt raced for the last 4 months, now im preparing my cars for the season and took my 3 racing lipo packs (7.4v hardcase roar approved) wich were without usage during 4 months, 2 of them stored on STORAGE mode of charge and the other one 3/4 charged.
The thing is that i put the 3 batts on 3 different chargers at the same time (each one 5.200mah pack, 40c) on balance-charge mode at 2.5amp.
The 3 batts finished the charge no problem,i disconnected them and thats it. Next day morning 3 of them were inflated like triple hamburguers !!! ... they even broke the hardcase off !! ...
So, WHY IN THE HELL this happened ?, im mainly a nitro racer so i can accept that i did something wrong, but i still dont see that really,
Now i have to buy new batts.
I use 11.1v lipo pack on my radio and 14.v pack on my starter box for nitro cars now im afraid to try to charge them too !!
thanks for your time guys,
#3
#5
I read that you are supposed to pull them out once a month to make sure they are still at the storage voltage. They discharge even when not connected.
This was one of the most informative sites I read about LiPos
rchelicopterfun.com/rc-lipo-batteries.html
This was one of the most informative sites I read about LiPos
rchelicopterfun.com/rc-lipo-batteries.html
#7
Yes, they were charged, and unplugged from chargers and they were puffed next morning.
3 charges, 2 of same brand one different, respectable brands (dont want to go into that hehehe) ... i charged couple of batts from a friend last week no problems at all (all were in-use batteries) ...
Batts were IP 5200's ...
3 charges, 2 of same brand one different, respectable brands (dont want to go into that hehehe) ... i charged couple of batts from a friend last week no problems at all (all were in-use batteries) ...
Batts were IP 5200's ...
#8
Were they subject to a fairly significant temperature change during the evening?
#10
Tech Champion
iTrader: (1)
You shouldn't leave lipos fully.charged. Everyone who comes from the.old.nimh days remebers.how.nimh batts where.pushed to the point where packs were only.good.for.a.single.meet. Lipo is going the same way with racers asking for higher and.higher c ratings (like it makes any difference) and packs are once again heading towards being more and.more volatile. If you want to prep a pack for racing try around 80-90% charge and quickly top it up at the track. Keep it at this.level.for the minimum time.possible.
At the end of the day it is safer to turn up to the track and charge at 2C than bring you packs precharged from the.day/night before.
At the end of the day it is safer to turn up to the track and charge at 2C than bring you packs precharged from the.day/night before.
#11
R/C Tech Elite Member
iTrader: (315)
I don't necessarily agree with that, part of the initial sales pitch of Lipo was that we can charge them and not have to run them for up to a week, any storage beyond a week was when you put them into storage mode.
My understanding was that the higher C rated Intellect packs did tend to puff a bit.
My understanding was that the higher C rated Intellect packs did tend to puff a bit.
#12
Tech Champion
iTrader: (1)
I don't necessarily agree with that, part of the initial sales pitch of Lipo was that we can charge them and not have to run them for up to a week, any storage beyond a week was when you put them into storage mode.
My understanding was that the higher C rated Intellect packs did tend to puff a bit.
My understanding was that the higher C rated Intellect packs did tend to puff a bit.
#13
I have cheap 5200/50c lipos that I sometimes leave fully charged for over a week. Abused weekly and never balanced. None of them have bloated.
Probably a product defect if a lipo bloats by simply being fully charged for 24 hours?
Probably a product defect if a lipo bloats by simply being fully charged for 24 hours?
#15
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