Today's Message Index:
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1. 12:49 AM - Re: Lithium battery (Keith.Miller@esa.int)
2. 09:30 AM - Re: Lithium battery (Scott Stearns)
Message 1
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Subject: | Re: Lithium battery |
Scott
I had a less favourable experience with the Lithium iron phosphate
batteries in my TR1 with an Io240 , It was also a massive weight saving,
it turned the engine over much faster than the conventional lead battery
(Concorde RG28) , they can not explode or catch fire and they retain power
when left for long periods on doing nothing at no harm to
them .............BUT it destroyed my alternator coupling. These batteries
have an incredible ability to give up power ( hence the high cranking
ouptut ) , but they also an incredible ability to demand power back from
the alternator to recharge once they have given up the power.
With a standard charging continental charging system, the battery was
demanding as much power as the alternator would provide immediately after
start up , which was loading the alternator coupling in about the worst
possible conditions ( engine running slowly ) . After replacing the
coupling , I adopted a different start up technique which had the alternator
switched off , until after take off ( ie engine up to full running speed
before switching it on ).
I spoke to an lithium battery expert working on installations for space
craft and she told me that they are incredible batteries , but you must
have a charging system that has been designed for them , and that lead acid
charging systems are not !! ( no matter what the supplier says) - hence the
reason you need a special charger to charge them at home. She gave me some
advice about putting in more resistance from the alternator to the battery
which would prevent 60 amps being drawn from the alternator.
This type of battery would have worked on some older continentals with a
direct metal spigot drive or a Lyco, (since all that would happen is the
alternator belt would slip). but the Io240 has a non replaceable glued
rubber drive which is designed to break if the loads are too high ( and
they cost about 600$ and a lot of downtime to replace ) .
just my 2cts worth on the subject .
Keith
.
From: Scott Stearns <sstearns2@yahoo.com>
To: Kisbuilders <kis-list@matronics.com>,
Date: 05/19/2015 09:54 PM
Subject: KIS-List: Lithium battery
Sent by: owner-kis-list-server@matronics.com
I just put an EarthX Lithium battery in my TR-1. I replaced an odyssey 680
battery with an earthX ETX-36, 4 pounds . The lithium is 12 pounds lighter
which really helped my CG. It cranks the engine like crazy. Engine is an
IO-360 with 10:1 compression. It really cranks it, way better than the
lead/acid.
$400 for the ETX-36 with charger. Not cheap, but it really helped with my
CG.
This is the much safer Lithium Iron Phosphate chemistry not the Lithium
Cobalt chemistry that Boeing had all the problems with. The EarthX batteries
have built in logic to balance the cells and protect from over or under
voltage.
Scott
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Message 2
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Subject: | Re: Lithium battery |
Thanks Keith. =C2-Very interesting. =C2-I have a plane power alternator
. =C2-Have to talk to them...
Scott
From: "Keith.Miller@esa.int" <Keith.Miller@esa.int>
To: kis-list@matronics.com
Sent: Wednesday, May 20, 2015 12:49 AM
Subject: Re: KIS-List: Lithium battery
Scott
I had a=C2- less favourable experience with the=C2- Lithium iron=C2-
phosphate
batteries=C2- in my TR1 with an=C2- Io240 ,=C2- It was also a massive
=C2- weight saving,
it turned the engine=C2- over much faster than the conventional=C2- lea
d=C2- battery
(Concorde RG28) , they=C2- can not explode or catch fire and they retain
power
when left for long periods on=C2- doing nothing at no harm to
them .............BUT=C2- it destroyed my=C2- alternator coupling. Thes
e batteries
have an incredible ability to give up=C2- power=C2- ( hence the high cr
anking
ouptut ) , but they also an incredible ability to=C2- demand power back
=C2- from
the alternator to recharge=C2- once they have given up the power.
With a standard charging=C2- continental charging system,=C2- the batte
ry was
demanding as much power as the alternator would provide=C2- immediately a
fter
start up , which was loading the=C2- alternator coupling=C2- in about t
he worst
possible conditions=C2- ( engine running slowly ) .=C2- After replacing
the
coupling , I adopted a different start up technique which had the alternato
r
switched off , until after take off=C2- ( ie engine up to full running sp
eed
before switching it on=C2- ).
I spoke to an=C2- lithium battery expert=C2- working on installations f
or space
craft and=C2- she=C2- told me that=C2- they are incredible batteries
, but you must
have a charging system that has been designed for them , and that=C2- lea
d acid
charging=C2- systems are not !! ( no matter what the supplier says) - hen
ce the
reason you need a special charger to charge them at home.=C2- She gave me
some
advice about putting in more resistance from the alternator=C2- to the ba
ttery
which would prevent 60 amps=C2- being drawn=C2- from the alternator.
This=C2- type of battery would have worked on=C2- some=C2- older cont
inentals=C2- with a
direct=C2- metal spigot drive=C2- or a Lyco, (since all that would happ
en is the
alternator belt would slip). but the Io240 has a non replaceable=C2- glue
d
rubber=C2- drive=C2- which is designed to=C2- break if the loads are
too high=C2- ( and
they cost about 600$ and=C2- a lot of downtime to replace=C2- ) .
just my 2cts worth=C2- on the subject .
Keith
.
From:=C2-=C2-=C2- Scott Stearns <sstearns2@yahoo.com>
To:=C2-=C2-=C2- Kisbuilders <kis-list@matronics.com>,
Date:=C2-=C2-=C2- 05/19/2015 09:54 PM
Subject:=C2-=C2-=C2- KIS-List: Lithium battery
Sent by:=C2-=C2-=C2- owner-kis-list-server@matronics.com
I just put an EarthX Lithium battery in my TR-1.=C2- I replaced an odysse
y 680
battery with an earthX=C2- ETX-36, 4 pounds .=C2- The lithium is 12 pou
nds lighter
which really helped my CG.=C2- It cranks the engine like crazy.=C2- Eng
ine is an
IO-360 with 10:1 compression.=C2- It really cranks it, way better than th
e
lead/acid.
$400 for the ETX-36 with charger.=C2- Not cheap, but it really helped wit
h my
CG.
This is the much safer Lithium Iron Phosphate chemistry not the Lithium
Cobalt chemistry that Boeing had all the problems with.=C2- The EarthX ba
tteries
have built in logic to balance the cells and protect from over or under
voltage.
Scott
This message and any attachments are intended for the use of the addressee
or addressees only.
The unauthorised disclosure, use, dissemination or copying (either in whole
or in part) of its
content is not permitted.
If you received this message in error, please notify the sender and delete
it from your system.
Emails can be altered and their integrity cannot be guaranteed by the sende
r.
Please consider the environment before printing this email.
S -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
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