Duralites & Arizona regulator..?

[Degzie]

Is this set-up OK?

The guy from REAL RAPTORS (UK) appears to have a problem with this set-up but his explanation got to technical for me.

Can anybody here help?

[DavidH]

Why would it be a problem to use Duralite batteries with an Arizona regulator?

All the regulator needs is the supplied voltage to operate. It doesn't care what type or brand of batteries is supplying the voltage.
The Duralite Li-Ion batteries will supply at least 7.4 volts the same as any other
Li-Ion battery that is setup to supply 7.4 volts.

I would like to hear the explanation why it is a problem to use Duralite batteries with Arizona regulator.

David

[Degzie]

I have copied an email recieved from real raptors, based in the UK.

-----Original Message-----
From: Andy Saunders [mailto:andy@realraptors.co.uk]
Sent: Tuesday, September 12, 2006 10:47 AM
To: Andy Wilson
Subject: RE: Message from Real Raptors

Hi Andy
there are no problems with the duralite regulators and duralite batteries
when used together.

The problem arises when you use a duralite pack with the arizona regulator,
as the arizona regulator can pull more current that the duaralite pack can
cope with.

On a bench test, the duralite pack balancing pcb under a 4 amp load from the
arizonia regualtor, reached a temp of 175 degrees in approx 15 seconds, this
is about the melting point of solder, so it could cause you problems, also
all electronic components have an operating temp, if you keep exceeding
these again this could cause you problems

As i said before the duralite setup is ok as long as you use duralite
regulators with duralite batteries, the arizona regualtor is fine working
with any 2 cell lithium setup

hope this helps

There is more info here

http://www.real-kbase.co.uk/fromeco.html

Andy

sales@realraptors.co.uk
http://www.realraptors.co.uk
Tel: 0871 288 4027
Fax: 0871 277 1587

[DavidH]

Well the Fromeco Peerless packs have a Safe Charge and balancing circuit installed also. So what he is saying makes no sense to me about the Duralite packs.

A 2 cell setup is OK I guess if you don't want the extra security of a 4 cell pack that is wired redundant. Personally I like the security of the 4 cell redundant wired pack. That way if a cell goes bad I will still have voltage and just lose some capacity. I have lost a cell in a redundant wired 4 cell pack before. I flew the rest of the day just checking the voltage before and after every flight.

From the Duralite website

Maximum Continuous Discharge

Each DURALITE PLUSTM pack will support a maximum safe constant draw of two times its rated capacity and support pulse loads of 5 times that capacity. For example, this allows for a 4 amp continuous load from an 2000mah pack and a pulse load of 10 amps. A 4000mah pack will support a 8 amp continuous load with a pulse load of 20 amps. Higher loads can be supported but this type of usage will reduce battery life and possibly cause damage to the pack over time.



David

[Degzie]

I thought it would be OK, I've got a Fury, A Chinook & a Raptor 50 running this set up & no worries so far.