A friend of mine passed this along. Being the safety officer at the club, I have been asked to try and come up with topics. This month (thanks to those who donate info here) is a reminder for the throttle cut switch. I thought I could post this and have Hobby Squawks best kick this around, add or delete things and see what comes out of it and be ahead for next months meeting.
Thanks in advance,
Kevin
Basic Lipo Batteries
AWARENESS
Thanks in advance,
Kevin
Basic Lipo Batteries
AWARENESS
- Charging multiple-cell packs is the most dangerous time for fires/explosions
- Charger settings (Battery type incorrect, Cell count to high, damaged/puffed packs, shorting, reversed polarity and over charging (4.2 volts per cell max)
- A LiPo cell base voltage is 3.7 volts. Never charge above 4.20 or discharge below 3.0 volts
- *NOTE* Moving a Lipo from a cold environment to a warm environment raises the voltage.
- Have a plan for handling a burning pack for all locations where packs are stored, charged, used. (e.g house car field)
- Make sure all charging is done in a fire protected environment. A bucket of sand is a good fire suppressant.
- Be present while charging LiPos (sleeping is not present)
- Use care on a ”first time charge pack” and puffed/swollen packs
- Use a balancing charger for LiPos with multiple cells
- Know your packs cell specs- “xS” (x=Cell count and MaH (Capacity)
- Set charger to “LiPo”, match cell specs and use “balancing settings”
- Use 1C charge rate settings for best battery life (260MaH =.2 or .3 Amp, 2700 MaH-2.7 amps)
- Ensure correct polarity
- Use a volt meter that displays all cell voltages (plug into balance plug)
- Pay more attention while charging if cell voltage difference in a pack is greater than .1 volt
- Immediately remove your battery from crashed aircraft and place in a fire-safe bag.
- Store all batteries in a fire safe location.
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