can a123 systems be float charged?  
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> A123Racing Support >> can a123 systems be float charged?
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can a123 systems be float charged? - 11/6/2006 2:11:28 PM   
nickf23


 

Posts: 1
Joined: 11/6/2006
From: , UNITED KINGDOM
Status: offline 		I'm am interested in building an battery pack for an ebike made up of 10 cells. I understand the normal way to charge is with individual cell balancing but I was wondering if a123 systems cells can be "floated" at a low current, or will the voltage go up over the all important 3.6 volts per cell?



Thanks

Nick
       Post #: 1

RE: can a123 systems be float charged? - 11/20/2006 9:33:40 PM   
CadillacETC2000



Posts: 6102
Joined: 10/23/2005
From: Tottenham/Orillia, ON, CANADA
Status: offline 		you can get a dewalt( i think ) 36 or 38 volts battery pack for a drill . . it contains A123 cells and it has a balancer in it . you could just charger it like it is and the put 2 of them on a Ebike and use it that way

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Pity , with all my extra cash , just waiting to line someone''s pockets.

(in reply to nickf23)
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RE: can a123 systems be float charged? - 11/20/2006 9:36:23 PM   
CadillacETC2000



Posts: 6102
Joined: 10/23/2005
From: Tottenham/Orillia, ON, CANADA
Status: offline 		http://www.slkelectronics.com/DeWalt/packs.htm
oh look it even has 10 cells !!

_____________________________

Pity , with all my extra cash , just waiting to line someone''s pockets.

(in reply to CadillacETC2000)
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RE: can a123 systems be float charged? - 11/21/2006 4:14:06 PM   
A123 Racing


 

Posts: 101
Joined: 8/25/2006
From: Hopkinton, MA, USA
Status: offline
Hello Nick,

How long are you looking to float charge the cells? Our batteries have a very high shelf life (due to our very low self discharge rates). They will only self discharge about 1% / week. So they can be kept on a shelf through an entire season if need be.

Back to the question at hand. Yes they can be float charged. There is no designated amperage to set you will want to use whatever amperage is needed to maintain 3.6V / cell. A charger with a float setting that can be adjusted to 3.6V / cell should work nicely.

Please let me know if you have any other questions.

Brian



(in reply to CadillacETC2000)
       Post #: 4

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