"C" Rating on LIPOS
01-13-2010, 10:37 AM
#1
"C" Rating on LIPOS
Hello,
What does the "C" rating mean? What is the difference between 15C and 30C?
How do I determine what C rating I need for my application?
Need to power a 92mm DF with a 7 blade, agressivly pitched rotor.
Conidering 6S or 7S with a 1500kv brushless inrunner.
I'm very new to the electric birds but I want to learn so go easy...
What does the "C" rating mean? What is the difference between 15C and 30C?
How do I determine what C rating I need for my application?
Need to power a 92mm DF with a 7 blade, agressivly pitched rotor.
Conidering 6S or 7S with a 1500kv brushless inrunner.
I'm very new to the electric birds but I want to learn so go easy...
01-13-2010, 11:34 AM
#2
RE:
Discharge "C"apacity
If you have a 2000mah battery thats rated at 10C you can get 2000 * 10 = 20000 mah / 1000 to convert to amps or 20amps
The same battery with a 25C rating could deliver 2000*25= 50000mah or 50amps continious without overheating and puffing.
If your application requires or pulls 40 amps then the 10C battery wouldn't cut it but the 25c battery would give you a safe overhead.
As for calculating amp draw from a specific power system I'll let someone more experienced with that comment.
If you have a 2000mah battery thats rated at 10C you can get 2000 * 10 = 20000 mah / 1000 to convert to amps or 20amps
The same battery with a 25C rating could deliver 2000*25= 50000mah or 50amps continious without overheating and puffing.
If your application requires or pulls 40 amps then the 10C battery wouldn't cut it but the 25c battery would give you a safe overhead.
As for calculating amp draw from a specific power system I'll let someone more experienced with that comment.
01-13-2010, 01:21 PM
#3
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RE:
I agree with Andy. But, remember a 2000 mah battery can only supply 2000 milliamps for an hour or 2 amps per hour. This would be considered "1C", if you draw 10C from the same battery it will only last 1/10 of an hour or about 6 minutes. Your should never run your battery completely down or out. This could damage the battery.
01-13-2010, 02:10 PM
#4
RE:
Absolutely, just using easy numbers.
You only want to draw 80 percent of a lipos capacity during a flight, any more than that and you're dragging cells below voltages where damage starts to occur. Keep it around 80 percent and you'll get the most cycles from your lipo.
You only want to draw 80 percent of a lipos capacity during a flight, any more than that and you're dragging cells below voltages where damage starts to occur. Keep it around 80 percent and you'll get the most cycles from your lipo.
