[AT] tractor hauling truck

[szabelski at wildblue.net]

4/0 cable is good for about 300 amps, so for 48,000 amps you’d need something along the lines of a transmission line. Also you can’t be putting 48,000 amps into any battery I can think of, without an explosion of course. 

 Batteries take a limited amount of current during charging before damage occurs, and as the battery starts to reach full charge, the charging current should drop. It’s usually referred to as trickle charging. 

Carl
----- Original Message -----
From: Stephen Offiler <soffiler at gmail.com>
To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com>
Sent: Fri, 29 Nov 2019 08:11:27 -0500 (EST)
Subject: Re: [AT] tractor hauling truck

I'm reading it the same as Howard.  5 seconds to plug it in, then you go do
something else for a number of hours.

Fun with math:  the older Leaf used a 24KW-hr battery.  (New ones are 40
and optionally 62).  Voltage is 360VDC.  24,000 W-hr divided by 360V gives
66.7 amp-hr.  Multiply by 3600 second in one hour, gives 240,000
amp-seconds.  Divide by 5 seconds and you get 48,000 amps. That would be
the current required to fully recharge a depleted battery in 5 seconds, in
theory.  In practice of course the cells can only soak up recharge current
at some modest rate.

SO

On Thu, Nov 28, 2019 at 8:28 PM Howard Pletcher <hrpletch at gmail.com> wrote:

> That would beat the best Tesla can do.  I think he's saying it takes him 5
> seconds to plug it in so it can charge while he's inside watching TV or
> whatever.
>
> Howard
>
> On Thu, Nov 28, 2019 at 8:13 PM Mike M <meulenms at gmx.com> wrote:
>
>> Charges in 5 seconds? Am i reading that correctly?
>>
>> Mike M
>>
>> On 11/28/2019 11:16 AM, James Peck wrote:
>> > I seem to remember that the Tesla plants were having problems with the
>> safety authorities because Elon Musk did not like to paint anything safety
>> yellow. Is that fact the tip of an iceberg?
>> >
>> > Carl Baker or Kim Lessor one or the other an AT List Member (
>> hodor at warmrock.net); So, umm - now?  Tesla's truck is $10k less than a
>> comparable F-150.  Chevrolet's Bolt (car) is about $10k more than a
>> comparable gas car.  My Nissan Leaf charges in the 5 seconds it takes me to
>> plug it in when I get home.  I don't have to stand there and watch it
>> charge.  I also refuse to accept less convenience and less utility for
>> higher cost.  Which is why I'm converting my fleet from gas to electric as
>> quickly as I can afford it (not very quickly).  Honestly, I'm keen to
>> convert my old Ford tractor to electric.  I'm tired of schlepping gas from
>> the gas station for it.  Or roading it to the gas station to fill it up.
>> Which I should probably do today - a storm is expected....
>> >
>> >
>> > Stephen wrote: "Anyway, you can keep your electric cars (and now
>> trucks) until they cost on par with a petrol-fueled equivalent, and
>> recharge more rapidly than they do now, and charging stations are
>> everywhere.  I refuse to accept less convenience and less utility for
>> higher cost."
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