GRA
Well-known member
Via IEVS: http://insideevs.com/7-7-kw-wireless-charging-standard-expected-adopted-january-2017/
WPT 3 and 4 are presumably European 3-phase.
7.7 kW Wireless Charging Standard Expected To Be Adopted By January 2017
- Thread starter GRA
- Start date
Help Support My Nissan Leaf Forum:
arnis
Well-known member
Wireless charging is total waste of everything.
As soon as Tesla demonstrates automatic plug wireless system will die.
Except low power devices like phones.
Two, three, twenty, hundred vehicles is kinda ok.
But imagine 500 000 vehicles, all charging wirelessly.
Every vehicle uses 4MWh of power with plug to drive each year.
Wireless system will add 1MWh annually for every vehicle.
So 500 GWh of heat just to get rid of plugs :roll: :evil:
It is better to invest 1000$ into actuated plug, rather than 500$
on wireless EVSE + 500$ on installation of wireless receiver.
As soon as Tesla demonstrates automatic plug wireless system will die.
Except low power devices like phones.
Two, three, twenty, hundred vehicles is kinda ok.
But imagine 500 000 vehicles, all charging wirelessly.
Every vehicle uses 4MWh of power with plug to drive each year.
Wireless system will add 1MWh annually for every vehicle.
So 500 GWh of heat just to get rid of plugs :roll: :evil:
It is better to invest 1000$ into actuated plug, rather than 500$
on wireless EVSE + 500$ on installation of wireless receiver.
GRA
Well-known member
If Tesla ever demonstrates reliable, low cost automatic plugs, wireless may die, but I'm not holding my breath. Given the energy savings from more cars going electric sooner thanks to wireless charging, plus the excess electricity generated by variable renewables that would otherwise have to be curtailed (barring cheap battery or other storage), IMO maximum energy efficiency is less important than higher adoption rate. The public will decide, and they invariably vote for convenience as long as the extra cost of inefficiency is affordable.arnis said:
arnis
Well-known member
Tesla's solution might not be the cheapest one.
As an engineer (without long experience) I'm able to sketch cheap solution in my mind.
Very shortly: additional coupling underneath the vehicle (like most inductive solution).
Coupling has IP67 rated shutters that retract as soon as plug (installed on garage flood for example)
and socket push together using actuators (up to 3 axis). Mating process is coordinated with few
cheap magnets. Nothing wrong with safety as EVSE's always have RCCB protecting people.
So imagine something similar like wireless charger below Nissan Leaf
Just that it has few actuators that move appropriately designed plug (J1772 needs some mods at least) into place.
Possible that 3-axis motorized plug is cheaper to make than massive coils in wireless solution.
If motorized part is installed on the floor (not in the vehicle) it must have small energy reserve for blackout removal.
(also possible to make spring loaded retractor (as soon as vehicle releases plug will come off with a bang).
If motorized part is installed in the vehicle then stationary part will be very cheap to make.
BUT.
Tesla will NOT fail with the whole autonomous vehicle fleet just because they are unable to charge vehicles autonomously :lol:
As an engineer (without long experience) I'm able to sketch cheap solution in my mind.
Very shortly: additional coupling underneath the vehicle (like most inductive solution).
Coupling has IP67 rated shutters that retract as soon as plug (installed on garage flood for example)
and socket push together using actuators (up to 3 axis). Mating process is coordinated with few
cheap magnets. Nothing wrong with safety as EVSE's always have RCCB protecting people.
So imagine something similar like wireless charger below Nissan Leaf
Just that it has few actuators that move appropriately designed plug (J1772 needs some mods at least) into place.
Possible that 3-axis motorized plug is cheaper to make than massive coils in wireless solution.
If motorized part is installed on the floor (not in the vehicle) it must have small energy reserve for blackout removal.
(also possible to make spring loaded retractor (as soon as vehicle releases plug will come off with a bang).
If motorized part is installed in the vehicle then stationary part will be very cheap to make.
BUT.
Tesla will NOT fail with the whole autonomous vehicle fleet just because they are unable to charge vehicles autonomously :lol:
GRA
Well-known member
Hmm, maybe they should have called the standard "SkyNet."
GRA
Well-known member
This is a lot less creepy than Tesla's articulated arm :shock: The latter seems to have disappeared, which isn't too surprising considering its mechanical complexity, which makes Falcon Wing Doors look like models of simplicity and reliability!
arnis
Well-known member
Like I said years ago, wireless will not be "the way" with autonomy.
Now years later is got nowhere.
Snake charger will soon emerge, likely next year. Likely somewhat changed in design but
still weird looking. Mechanical coupling is the way.
Now years later is got nowhere.
Snake charger will soon emerge, likely next year. Likely somewhat changed in design but
still weird looking. Mechanical coupling is the way.
GRA
Well-known member
arnis said:
It didn't go very far because there wasn't a standard. Now there is.
I'm curious on what information you're basing your claim that the Tesla-only snake charger "will soon energe", besides Elon's claim a few weeks back that it would be used by their robotaxis, whenever they might be allowed to operate?
GRA
Well-known member
arnis
Well-known member
GRA said:
Well then one might create a standard for a snake. Does it change anything?
Elon said it will come because it has to and he knows it. I know it. There is no other way.
Or you don't agree? Is there any OTHER way besides weird thing that plugs in itself?
GRA
Well-known member
arnis said:
Sure, standard wireless charging that requires nothing more than driving over it, has no moving parts and thus requires essentially no maintenance unlike the snake, and which AVs can use easily. The downside is lack of portability and higher installation costs, but those are almost certainly outweighed by lower parts and O&M costs and greater convenience, and a lack of exposure to accidents and damage.
Similar threads
