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'[EE] FePH batteries'
2008\08\20@130936 by alan smith

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Has anyone worked with IronPhosphate based batteries?  These are supposed to be a better alternate to Lithium based, but the charging is somewhat different, and the voltage a little lower at 3.2V



     

2008\08\20@145742 by William \Chops\ Westfield

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On Aug 20, 2008, at 10:09 AM, alan smith wrote:

> Has anyone worked with IronPhosphate based batteries?  These are  
> supposed to be a better alternate to Lithium based, but the  
> charging is somewhat different, and the voltage a little lower at 3.2V

They're still LITHIUM batteries, but with a different (safer) cathode  
(?) material.  "Better" generally means "safer"; the energy density  
is somewhat lower than normal Li-ion cells.   This technology is used  
in the deWalt lithium power tools, and has been used by both the RC  
people and the candlepowerforum crowd.  The power-tool batteries use  
FANCY (nano-particle) iron phosphate, and have very impressive  
current capabilities; I don't think that ALL of the FePO4 batteries  
use this technology, though.  The same chinese vendors and battery    
resellers willing to sell you bare Li-ion cells typically also sell  
Li-FePO4 cells; I've no personal experience with any of them.

http://www.dealextreme.com/search.dx/search.lifepo4

BillW

2008\08\20@185832 by John Ferrell

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The popular name for the cells is "A123"
John Ferrell    W8CCW

"All that is necessary for the triumph of evil is for good men to do
nothing." -- Edmund Burke
http://DixieNC.US

----- Original Message -----
From: "alan smith" <spam_OUTmicro_eng2TakeThisOuTspamyahoo.com>
To: "Microcontroller discussion list - Public." <.....piclistKILLspamspam@spam@mit.edu>
Sent: Wednesday, August 20, 2008 1:09 PM
Subject: [EE] FePH batteries


> Has anyone worked with IronPhosphate based batteries?  These are supposed
> to be a better alternate to Lithium based, but the charging is somewhat
> different, and the voltage a little lower at 3.2V
>
>
>
>
> --

2008\08\20@210539 by Jake Anderson

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face
We use them as batteries for our combat robot.
I can safely say they are "tolerant of abuse" ;->

John Ferrell wrote:
> The popular name for the cells is "A123"
> John Ferrell    W8CCW
>
> "All that is necessary for the triumph of evil is for good men to do
> nothing." -- Edmund Burke
> http://DixieNC.US
>
> {Original Message removed}

2008\08\21@010031 by William \Chops\ Westfield

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On Aug 20, 2008, at 3:58 PM, John Ferrell wrote:

> The popular name for the cells is "A123"


A123 cells are a particular (very good!) brand of LiFePO4 cells, from  
http://www.a123systems.com/  These are the ones used in power tools  
that I mentioned, using "nanotechnology" as well as the different  
chemistry.  However, there ARE LiFePO4 cells that are not from  
A123systems.  These retain the improved safety, but have discharge  
capabilities typical of "normal" Li-ion cells...

BillW

2008\08\21@065311 by olin piclist

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John Ferrell wrote:
> The popular name for the cells is "A123"

No, A123 is the name of company that manufacturs lithium ion cells and power
systems using them.  Their headquarters are at 321 Aresnal Street, Watertown
MA.


********************************************************************
Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000.

2008\08\21@104358 by John Ferrell

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In the Radio Control Airplane field "A123" has become a brand name like
"Kleenex", "Aspirin" or "Xerox".
When compared to LiPo batteries they lose on weight, are equal in price but
much better in terms of safety, life and tolerance to abuse.

John Ferrell    W8CCW

"All that is necessary for the triumph of evil is for good men to do
nothing." -- Edmund Burke
http://DixieNC.US

{Original Message removed}

2008\08\21@114510 by 'Grif'

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Are you able to source the cells in smallish numbers individually, or are you "harvesting" from Bosch products?


-----Original Message-----
{Quote hidden}

2008\08\21@204120 by John Ferrell

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Individualy or assembled packs.
http://www.bphobbies.com/view.asp?id=C2116942&pid=C2126943

John Ferrell    W8CCW

"All that is necessary for the triumph of evil is for good men to do
nothing." -- Edmund Burke
http://DixieNC.US

----- Original Message -----
From: "'Grif'" <EraseMEkgriffitspam_OUTspamTakeThisOuTwolfenet.com>
To: "Microcontroller discussion list - Public." <piclistspamspam_OUTmit.edu>
Sent: Thursday, August 21, 2008 11:44 AM
Subject: Re: [EE] FePH batteries


>
> Are you able to source the cells in smallish numbers individually, or are
> you "harvesting" from Bosch products?
>
>
> {Original Message removed}

2008\08\22@122024 by 'Grif'

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face


Thanks,,, just what I was looking for.

-----Original Message-----
{Quote hidden}

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