[AT] tractor hauling truck

[HRP]

For reference, I recently had a tour of the Steel Dynamics railroad rail welding facility where they weld shorter segments into 1/4 mile long rails. They apply 1000 amps for about 2 seconds to fuse the rails together.   It would take something larger to handle 48,000 amps. 

Howard

> On Nov 29, 2019, at 8:18 AM, "rbrooks at hvc.rr.com" <rbrooks at hvc.rr.com> wrote:
> 
> I’m not sure what the wire size and power connecter would be for 48,000 amps but I know its not small. 
> 
> To early in the day todo the math
> 
> Sent from my iPhone
> 
>> On Nov 29, 2019, at 8:11 AM, Stephen Offiler <soffiler at gmail.com> wrote:
>> 
>> 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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