KIS-List Digest Archive

Wed 05/20/15


Total Messages Posted: 2



Today's Message Index:
----------------------
 
     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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    Time: 12:49:23 AM PST US
    Subject: Re: Lithium battery
    From: Keith.Miller@esa.int
    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 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 sender. Please consider the environment before printing this email.


    Message 2


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    Time: 09:30:46 AM PST US
    From: Scott Stearns <sstearns2@yahoo.com>
    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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