Re: [EVDL] Testing 8 volt batteries? - DIY Electric Car Forums
Go Back  

DIY Electric Car Forums > External Information > EVDL List

Register Blogs FAQ Members List Social Groups Calendar Search Today's Posts Mark Forums Read

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 03-13-2009, 04:56 PM
EVDL List EVDL List is offline
EVDL List Bot
 
Join Date: Jul 2007
Posts: 70
EVDL List is on a distinguished road
Default Re: [EVDL] Testing 8 volt batteries?

Ideas:

1) -- big resistor (like a 500 watt rated 0.2 ohm or such). Won't be a
constant wattage load, but will work to capacity test with a little more
monitoring, though not as slick as using the inverter and the timer).

2) -- wire 3 of them in series to get a 24 volt sub-bank, and do testing
and charging that way, using a 24 volt inverter and charger. Not as good as
individually, but better than all 9 of them in series.

3) -- use a dumb 12 volt charger, and just monitor the voltage yourself to
prevent overcharging (smart chargers probably won't turn on if the battery
is only 8 volts, but a dumb one may just put in current anyway)

[quote] sanfranman12 <xxx@xxx.xxx> wrote:

>
> I am doing an EV conversion and just purchased 9 8-volt Interstate
> batteries.
> How am I supposed to charge and test these babies?
>
> I'm configuring a 72 volt pack and am about to order a Delta-Q charger.
> However, I have read the cautions about testing each battery individually
> to
> make sure that they are well balanced when you buy new batteries. The
> preferred testing method appears to involve a 12 volt DC to 120 volt AC
> inverter, an electric space heater, and a clock. But the inverter isn't
> going to work with my 8 volt batteries!
>
> Any recommendations about how to run the capacity test of the 8 volt
> batteries?
>
> Also, if I configure the whole pack of 9 volt batteries and charge them
> that
> way, can I assume that each battery is getting a full charge? Or do I need
> to find an 8 volt charger to charge each battery individually when I am
> testing them?
>
> I see that I can buy something that looks like a trickle charger that puts
> out 1 to 2 amps. Maybe I can do a bulk chage in the full pack and then
> "top-off" each battery individually with the smaller charger.
>
> Thanks in advance for any help.
>
> Tom
> --
> View this message in context:
> http://www.nabble.com/Testing-8-volt-batteries--tp22501458p22501458.html
> Sent from the Electric Vehicle Discussion List mailing list archive at
> Nabble.com.
>
> _______________________________________________
> General EVDL support: http://evdl.org/help/
> Usage guidelines: http://evdl.org/help/index.html#conv
> Archives: http://evdl.org/archive/
> Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev
>
>
_______________________________________________
General EVDL support: http://evdl.org/help/
Usage guidelines: http://evdl.org/help/index.html#conv
Archives: http://evdl.org/archive/
Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev
Reply With Quote
 

Share or Bookmark this

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

 
Support DIY Electric Car
Sponsors

All times are GMT -6. The time now is 08:49 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

Ad Management by RedTyger