Airbus 320 Battery Question

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propsync

Well-Known Member
question for those of you who fly the airbus on the batteries.

When I think of aircraft batteries in general, they are typically 24 volt and charge somewhere around 26 volt.

Is the airbus different in this regard? What is the normal battery voltage with and without charging on the A320?

I ask because without any power on the airplane, the minimum voltage is 25.5 volts which would lead me to believe these are not your normal 24 volt batteries you see in aviation. What are the batteries "labeled" as voltage wise?
 
propsync said:
question for those of you who fly the airbus on the batteries.

When I think of aircraft batteries in general, they are typically 24 volt and charge somewhere around 26 volt.

Is the airbus different in this regard? What is the normal battery voltage with and without charging on the A320?

I ask because without any power on the airplane, the minimum voltage is 25.5 volts which would lead me to believe these are not your normal 24 volt batteries you see in aviation. What are the batteries "labeled" as voltage wise?
Click to expand...
Keep in mind a normal lead acid 12v battery has an "at rest" charge of 12.6-12.7v. Anything around 12v basically means it's almost toast. I would assume a 24v battery would be the same.

It can be under 25.5v but once charging for 20 mins it should hold a 25.5v charge. If not the battery has lost capacity. I did come on board once and one was 8.6 the other 10.5. No amount of charging would bring it up near close to normal. I think I spent around 12 hours on that airplane that day.
 
Airbus batteries consist of tiny fairies dancing in a circle sprinkling pixie dust into a small wishing well. The interaction of the dust with the well creates an electrostatic charge, and thus provides the requisite voltage.

Because the Airbus is European, the fairies dance clockwise, and the diameter of the dancing circle is measured in metric units.

Richman
 
All I need to know for the 320 batteries....

Min volt limitation (25.5v), what the battery test is (off, then on, check current dropping), and the 3 times the batteries are connected directly to the bus.

I guess if you go deeper, with a failure of ADIRUs, IR2 and IR3 will stay on power for 5 minutes, and IR1 will stay until power restored or until batteries fail. It's 146am and I think what I wrote is correct.

Then the what happens if both engines/generators fail in flight, initially you have batteries only and 2 screens, AC essential and DC essential, then the 5 second deploy RAT, 3 second energize for the RAT to the emergency generator, and you get 2 more screens back and 2 shed busses back.

That's pushing it. Really is all one needs to know for the batteries for the oral and from an operating standpoint.

Don't know the weight of the battery. It is irrelevant information. Doesn't affect me operationally, I can't change/alter it, and not knowing it does not hinder normal/abnormal ops.
 
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