Lithium batteries - LiPo LiMn etc
01-30-2008, 09:08 PM
#151
bro,
not all ESC has the lipo cut off voltage function. you need to check the spec. i dont think keyence has that yet. however, kenyence makes great esc hope they will come out with a BL system
if your esc dont have the cut off, you can buy a separate module such as the Novak Smart stop Lipo cut off module as shown in few posts above.
not all ESC has the lipo cut off voltage function. you need to check the spec. i dont think keyence has that yet. however, kenyence makes great esc hope they will come out with a BL system
if your esc dont have the cut off, you can buy a separate module such as the Novak Smart stop Lipo cut off module as shown in few posts above.
01-31-2008, 01:21 AM
#152
If you have space, hook up a Novak Smart Stop 2s to your Exstraight. That would be the simplest solution. Otherwise, get an ESC with lipo cutoff - preferably cutting off at about 6V.
When the low voltage cutoff kicks in and your car will have a jerky throttle (sometimes on, sometimes off). Stop the car, walk over and pick it up. Don't try to drive it to you or you might end up with a runaway car. Haha.
02-01-2008, 12:19 AM
#154
Hard to say how long. In touring, maybe about that time. I never timed it. But agak agak, about same time as a 3800 NiMH pack, I think.
3600 has the same shape bottom as the 3200 Carbon, but the top is flat like the 4800 Platinum, I think. So... it'll fit well in some touring cars, won't fit in M-chassis (I think lah, I haven't got one to try).
You can't go wrong with a Team Orion LiPo, but just make sure they fit in your car.
3600 has the same shape bottom as the 3200 Carbon, but the top is flat like the 4800 Platinum, I think. So... it'll fit well in some touring cars, won't fit in M-chassis (I think lah, I haven't got one to try).
You can't go wrong with a Team Orion LiPo, but just make sure they fit in your car.
02-01-2008, 07:04 AM
#156
Do anyone here know where if could get Core 5000 Lipo pack ? Pls don't tell me from the states coz it cost a lot on shipping. Maybe in Singapore or Hong Kong ?
Help appreciated.
Thanks.
Help appreciated.
Thanks.
02-03-2008, 09:49 PM
#157
Tech Adept
Exploding LiPos
Hello all,
I wanna share my story of an exploding (more like burning furiously LiPo battery) that just happened on Feb 3rd 2008.
I have (had) a Kokam 2 cell,1500mAh that i charged up for my EP plane that i had wanted to fly that evening. Usually the charger takes about 1 hr plus to charge up the battery,but this time, the charge light wouldnt go off. So, after couple of hours ( i didnt check, my bad!!), the battery became bloated.
I know that a bloated battery is DANGEROUS!, and so i decided to do something about it. The correct procedure is (according to my Sifu ) :
1) DONT go and press on the battery when it is bloated..Damn freaking dangerous
2) Discharge fully
3) Slit the packaging
4) put the battery in salt water to neutralise it
5) Throw it away. You neutralize the chemicals inside it to make it safer if u dispose it in the trash (which is bad btw).
Instead of discharging it, i took out my modelling knife and made a small slit on the side....then i saw sparks ,..then POOF...a big stream of fire. It was very much like loose CNY, Hari Raya, Deepavali firecracker powder on fire. It has sufficient force to make the battery pack to swirl round and round (i throw it on the floor the moment it caught fire).
So , i hope this will be lesson and further proof that a bloated LiPo battery is DANGEROUS.
sllim
(Now i have to buy another)
I wanna share my story of an exploding (more like burning furiously LiPo battery) that just happened on Feb 3rd 2008.
I have (had) a Kokam 2 cell,1500mAh that i charged up for my EP plane that i had wanted to fly that evening. Usually the charger takes about 1 hr plus to charge up the battery,but this time, the charge light wouldnt go off. So, after couple of hours ( i didnt check, my bad!!), the battery became bloated.
I know that a bloated battery is DANGEROUS!, and so i decided to do something about it. The correct procedure is (according to my Sifu ) :
1) DONT go and press on the battery when it is bloated..Damn freaking dangerous
2) Discharge fully
3) Slit the packaging
4) put the battery in salt water to neutralise it
5) Throw it away. You neutralize the chemicals inside it to make it safer if u dispose it in the trash (which is bad btw).
Instead of discharging it, i took out my modelling knife and made a small slit on the side....then i saw sparks ,..then POOF...a big stream of fire. It was very much like loose CNY, Hari Raya, Deepavali firecracker powder on fire. It has sufficient force to make the battery pack to swirl round and round (i throw it on the floor the moment it caught fire).
So , i hope this will be lesson and further proof that a bloated LiPo battery is DANGEROUS.
sllim
(Now i have to buy another)
02-03-2008, 11:16 PM
#158
bro dont puncture the battery. When exposed to oxigen, it detonates easily.
03-24-2008, 10:49 PM
#159
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