Dual A123 battey though diode voltage drop?
10-16-2009, 04:59 PM
#1
Dual A123 battey though diode voltage drop?
Hello, I am runnig dual A123 batteries (1100mah) with two switches through a diode battery share device (42% battery share) The voltage after the diode drops 0.3 volts, and the voltmagic says obviously that is low (6.6 before the diode and 6.3 after the diode). The peak low voltage seems fine, green blinking, so acceptable. The question is this a problem? Should I run the both packs in parallel without diode? What do you think.
Thanks
Thanks
10-16-2009, 09:55 PM
#4
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RE: Dual A123 battey though diode voltage drop?
+3 on getting rid of the batt share. The best part about the A123's is there is no need for a regulator or diode to drop the voltage.
2 batteries, 2 switches. Keep it simple
2 batteries, 2 switches. Keep it simple
10-17-2009, 01:34 AM
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RE: Dual A123 battey though diode voltage drop?
yes exactly true as above. i was considering the use of a Diode to be fitted to my transmitter Lipo battery as many have done but what happens if the Diode fails , [ no contact = no power ]
10-17-2009, 12:02 PM
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RE: Dual A123 battey though diode voltage drop?
What are the chances that a forward biased diode, running at a fraction of its rated current and voltage will fail open??
Probably not much
I've seen at least one person double up two in parallel just to be safe.
Pete
Probably not much
I've seen at least one person double up two in parallel just to be safe.Pete
10-17-2009, 12:47 PM
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RE: Dual A123 battey though diode voltage drop?
Fulcrum:
The purpose of two separate battery packs with two separate switches is to provide back-up redundency if one pack should fail. Doesn't the battery share device cause a convergence that now circumvents the redundency back-up?
The purpose of two separate battery packs with two separate switches is to provide back-up redundency if one pack should fail. Doesn't the battery share device cause a convergence that now circumvents the redundency back-up?
10-17-2009, 05:04 PM
#8
RE: Dual A123 battey though diode voltage drop?
Captain, I have tested the dual battery device and has dual input cables, two diodes and two output cables. It will power by both of the output cables with only one of the batteries, so its redundant.
After all, I have listened to your recommendation and removed the dual battery device, now voltmagic works as expected and the average and peak low voltage remain in a safe spot.
Thank you.
After all, I have listened to your recommendation and removed the dual battery device, now voltmagic works as expected and the average and peak low voltage remain in a safe spot.
Thank you.
