Matronics Email Lists :: View topic - OT: batteries in series on maintainer

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

OT: batteries in series on maintainer

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

raymondj(at)frontiernet.n
Guest

Posted: Tue Jul 10, 2012 8:07 pm Post subject: OT: batteries in series on maintainer

Greetings,



I recall a prohibition on charging batteries in series at the series 

voltage.  I have 2 6V sealed lead/acid batteries. I would like to hook 

the series connected 6V batteries in parallel with several 12V lead/acid 

batteries on a maintainer.  They would be fully charged before I put 

them on the maintainer.  I would consider holding the voltage in the 6V 

batteries at 80% of full charge acceptable.



Thanks for any insight/advice/warnings.



do not archive

-- 

Raymond Julian

Kettle River, MN.



"And you know that I could have me a million more friends,

and all I'd have to lose is my point of view." - John Prine

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

nuckolls.bob(at)aeroelect
Guest

Posted: Wed Jul 11, 2012 5:46 am Post subject: OT: batteries in series on maintainer

At 11:06 PM 7/10/2012, you wrote:




Greetings,



I recall a prohibition on charging batteries in series at the series 

voltage.  I have 2 6V sealed lead/acid batteries. I would like to 

hook the series connected 6V batteries in parallel with several 12V 

lead/acid batteries on a maintainer.  They would be fully charged 

before I put them on the maintainer.  I would consider holding the 

voltage in the 6V batteries at 80% of full charge acceptable.



    I think those discussions were about putting two 12v

    batteries in series for 24v performance and the TAPPING

    the mid-point between the batteries to power 12v accessories.



    There's nothing fundamentally wrong with hooking batteries

    in series from the perspective of charging/discharging them.

    A 12v battery is a collection of 6 cells in series, a 24v

    battery has 12 cells. Whether all the cells are in the same

    enclosure is irrelevant. The caveats for series connection

    is that the size and condition of all cells in a series

    string be as closely matched to each other as practical.



    In other words, two identical batteries with different

    service histories are not good candidates for series

    connection. Similarly, batteries of different manufacture

    or capacity are at risk for diminished performance in

    a series connection.



    If your 6v batteries are charged/discharged as a matched

    pair from new to discard, they will perform well. This

    is true even if they are say charged in series but discharged

    in parallel. But if they are ever separated in the performance

    of duty as energy sources, then their "alikeness" begins

    to diverge and some amount of service life as a pair will

    be lost.



    That's all very non-quantified. There's no hard cause

    and effect numbers to be offered. Design goals for

    longest service life calls for treating all cells in a

    multi-cell system the same irrespective of their

    packaging.

   Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

raymondj(at)frontiernet.n
Guest

Posted: Wed Jul 11, 2012 2:23 pm Post subject: OT: batteries in series on maintainer

Bob,



You're right, that was the conversation that I took an incorrect 

impression away from.  Thanks for the info.



do not archive



Raymond Julian

Kettle River, MN.



"And you know that I could have me a million more friends,

and all I'd have to lose is my point of view." - John Prine

On 07/11/2012 08:46 AM, Robert L. Nuckolls, III wrote:

 	  Quote: 	
		   

 <nuckolls.bob(at)aeroelectric.com>



 At 11:06 PM 7/10/2012, you wrote:

 



 Greetings,



 I recall a prohibition on charging batteries in series at the series

 voltage.  I have 2 6V sealed lead/acid batteries. I would like to hook

 the series connected 6V batteries in parallel with several 12V lead/acid

 batteries on a maintainer.  They would be fully charged before I put

 them on the maintainer.  I would consider holding the voltage in the 6V

 batteries at 80% of full charge acceptable.



-----------------SNIP ------------------------
	


 	  Quote: 	
		      Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum