[Oeva-list] over discharged lithium pack

Travis Gintz frodus17 at gmail.com
Fri May 6 14:04:43 PDT 2011


How low is too low?

Get a single cell charger and start charging them up, one by one.


On Fri, May 6, 2011 at 11:15 AM, Ron Jayasuriya <evmail4ron at yahoo.com>wrote:

> I have a customer who accidentally left his car on and ran his 400V Kokum
> battery pack too low, and his charger won't try to charge them now.
>
> AC Propulsion kit, probably proprietary charger, do not have any specs.
> Car has BMS and balancing, so we will probably be ok once we get them
> charged up somehow.
>
> Ideas?
>
> I was thinking that if there were a Rudman PFC 20 out there somewhere I
> might be able to use it to give the pack little boost using the adjustable
> voltage/current feature of that charger.  Not sure for certain, but I think
> I should be able to monitor the batteries for voltage AND heat during the
> process.
>
> Does this sound reasonable?  Dangerous in any way?  I don't think so, but
> it's worth asking.
> Anyone with some experience with over-discharged lithium batteries, or a
> PFC-20 they'd let me use, feel free to chime in.
>
> Thanks!
>
> Ron
>
>
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>


-- 
Travis Gintz
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