How about putting the battery in the trailer instead of the tractor? (for
tractor-trailer big rigs).
Then you can swap batteries every time you swap trailers. Just need a big
electrical hookup between the trailer and the tractor.
I guess you'd still want a battery in the truck, but heck you could charge
this from the trailer too while moving.
On Thursday, March 20, 2025 at 06:45:31 PM PDT, Bill Dube via EV
<ev@lists.evdl.org> wrote:
When you can simply charge your ~300 mile EV in 5 minutes, there is
little point in swapping the battery pack. It would take more than 5
minutes to swap.
"Better Place" https://en.wikipedia.org/wiki/Better_Place_(company) Was
a well funded company that gave battery swapping a serious go in the
mid-2000's. (I met the CEO Dan Cohen at a conference in Iceland.) There
were far too many obstacles to make this happen. Death of one thousand
cuts. Some of the major hurdles are mentioned in later posts to this
thread.
They are, however, doing pack swaps with truck fleets on small
pilot programs. I don't think this will be the best solution in the end.
They have had excellent success charging HUGE packs in ferrys for
several years.
Like hub motors, it seems like a really good idea on a napkin, then
after you actually run a pilot program (or build a prototype) the
multitude of technical obstacles encountered become insurmountable.
Bill D.
On 3/21/2025 7:10 AM, Lee Hart via EV wrote:
>> Note that with a buffer pack (BESS) the grid just sees the average power
>> of what you expect of a DCFC station, so the main issue is to get the
>> power into the car without burning up the cables or contacts.
> Maybe it's time to reconsider having quick-change battery packs, like they've
> done forever in industrial EVs? No need for expensive super-powered chargers
> or hot heavy liquid-cooled cables.
>
> But it would (gasp! choke!) require EV manufacturers to standardize their
> batteries.
>
> Lee
> --
> Excellence does not require perfection. -- Henry James
> But it *does* require attention to detail! -- Lee Hart
> --
> Lee A. Hart https://www.sunrise-ev.com
>
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