[DeTomaso] [EVDL] NiMH availablity ...

[Sean Korb]

I have an unreasonably heavy foot.  I think even when I build a BMS
I'll need to program it to cut out a bit early to save my pack from
myself.  I would need to identify and restrain the weaker battery at
the first sign of trouble and I'd like a computer to alert me.  Bottom
balancing requires that I become the BMS and I'm not fastidious enough
or rational enough to set battery limits in a reactive setting.

The other day my Honda (off topic) had a heater hose leak.  Instead of
pulling over to tape it up I drove the next mile to work and hoped for
the best.  It worked out but if it had been a voltage sag instead I
might have pushed it and ruined the pack.  I need to set up very firm
boundaries in advance.  Not as much a $$$ decision as it is a design
decision.

sean



On Thu, Mar 6, 2014 at 6:22 PM, Marcus Reddish <marcus.reddish at gmail.com> wrote:
> BMS?  Sure, if you got extra cash, but it sounds like you are working a
> tight budget.  If so, go bottom balance and cut charge a little early.
> Fairly easy to identify your weakest cell and monitor just that one to
> prevent overcharge (it will get full first).
>
> Cheers
>
>
> On Thu, Mar 6, 2014 at 10:59 AM, Sean Korb <spkorb at gmail.com> wrote:
>>
>> I don't have regen on my GE forklift motor and Curtis controller so
>> that sounds about right.  I'd need 1.5 of those packs plus about $1000
>> in charger and BMS electronics.  I have a 40 mile round trip commute
>> and a 10 mile lunch/bank run but my car is very light so that only
>> uses.. well about 18kwh.
>>
>> I should have at least 24kwh so I don't kill the battery and I have
>> some room to keep 18kwh over 8 years so that I can amortize the cost
>> fully.
>>
>> Maybe I really only need 7 or $8000?
>>
>>
>> On Thu, Mar 6, 2014 at 12:27 PM, Cruisin <cruisin at live.com> wrote:
>> > I have a 18kw Li-ion pack for $4000.00. You cant do better than that?
>> >
>> >
>> >
>> > --
>> > View this message in context:
>> > http://electric-vehicle-discussion-list.413529.n4.nabble.com/Re-NiMH-availablity-tp4668269p4668273.html
>> > Sent from the Electric Vehicle Discussion List mailing list archive at
>> > Nabble.com.
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>>
>>
>>
>> --
>> Sean Korb spkorb at spkorb.org http://www.spkorb.org
>> '65,'68 Mustangs,'68 Cougar,'78 R100/7,'60 Metro,'59 A35,'71 Pantera #1382
>> "The more you drive, the less intelligent you get" --Miller
>> "Computers are useless.  They can only give you answers." -P. Picasso
>> _______________________________________________
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>>
>
>
>
> --
> Marcus Reddish



-- 
Sean Korb spkorb at spkorb.org http://www.spkorb.org
'65,'68 Mustangs,'68 Cougar,'78 R100/7,'60 Metro,'59 A35,'71 Pantera #1382
"The more you drive, the less intelligent you get" --Miller
"Computers are useless.  They can only give you answers." -P. Picasso