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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> Battery safety
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Battery safety - 12/26/2001 10:36:55 AM   
Fighterpilot



Posts: 445
Joined: 12/20/2001
From: Kenner, LA, USA
Status: offline 		After all this charging business is said and done, the best way to protect that aircraft is to run two redundant battery packs. I run two battery packs each to a different on/off switch and then each switch to a different location in my receiver. I put a diode between each switch and the receiver which will not allow one pack to short out or drain the other. I use 6V packs which send 6.2volts to the receiver on a full battery charge allowing for the 0.7 volts drop caused by the diode. My procedure at the field is to turn on one switch and operate all controls, turn that switch off, turn the other on and again operate all controls. I then turn the first switch back on, now operating my aircraft on two separate and redundant power sources. If you don't forget to turn on both switches your chances of losing an aircraft on account of a switch failure or battery pack failure are pretty slip.
       Post #: 1

Re: Battery safety - 12/27/2001 5:48:20 PM   
Red Scholefield



Posts: 4974
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		[QUOTE]Originally posted by Fighterpilot
After all this charging business is said and done, the best way to protect that aircraft is to run two redundant battery packs. I run two battery packs each to a different on/off switch and then each switch to a different location in my receiver. I put a diode between each switch and the receiver which will not allow one pack to short out or drain the other. I use 6V packs which send 6.2volts to the receiver on a full battery charge allowing for the 0.7 volts drop caused by the diode. My procedure at the field is to turn on one switch and operate all controls, turn that switch off, turn the other on and again operate all controls. I then turn the first switch back on, now operating my aircraft on two separate and redundant power sources. If you don't forget to turn on both switches your chances of losing an aircraft on account of a switch failure or battery pack failure are pretty slip. [/QUOTE]

For an in depth discussion on parallel operation check the article at the Battery Clinic. Diodes are not really required and do add more failure modes to the system plus and extra cell to the pack to make up for the voltage loss.

_____________________________

Red S.
AMA 951 Leader Member

(in reply to Fighterpilot)
       Post #: 2

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