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Not an electrical engineer. Why not inductive charging or any other wireless technology? Also it does not require a single entry point - do it in parallel. Al

Not an electrical engineer. Why not inductive charging or any other wireless technology? Also it does not require a single entry point - do it in parallel. Also when 1 minute is not possible, how about increasing the time? Edit: in addition, charging entry does not have to be on the side, it can be on top or on bottom - we do not need any gravity assist.

gambiting 6y ago
Wireless charging doesn't solve anything - you would still need to deliver 100kWh(for a large car battery) into the charging pad within a minute. And then you need to receive it on the other end - you don't have a plug, but obviously your receiver now has the same issue. You just moved where the problem is. I'd argue that having such an incredibly strong inductive field is a problem as well, but yeah, you're not even going to get that far. Parallel charging is potentially the answer - but even with 10 cables, for a 100kWh battery, you're still talking.....600kW per cable? CCS goes only up to 200kW(and those are THICK cables), so if you increase the charging speed to 3 minutes then yes, you could do it with 10 cables. 6 minutes with 5 cables, 30 minutes with one cable.....and we're(almost) back to what existing technology already allows?
- nojokes 6y ago
  The issue is that with current plug placement there must be a really hefty cable inside the car too. What about short range inductive charging from the bellow of the car (where the battery is)? With grid of 5x5 or 6x6 for example? Inductive charging because it would be very difficult to have any kind of plug below the car because of the high corrosion risk. Charger must align itself automatically to the right position and distance.
bryanlarsen 6y ago
Inductive chargers are ~80% efficient, compared to cables which are well over 99% efficient. Even though super efficient and despite electrical conductors being good heat conductors, the cable still needs active cooling to dump waste heat. Your inductive charger and the attached vehicle are going to have dump tens of kWh of heat in a few minutes, and will have to do it through air, without barbecuing the humans inside.
bryanlarsen 6y ago
Parallel charging is the current answer. https://insideevs.com/photo/5439695/mine-smart-ferry-fast-charging-inlets-plugs/ https://insideevs.com/photo/5439695/mine-smart-ferry-fast-ch...

gambiting 6y ago

Wireless charging doesn't solve anything - you would still need to deliver 100kWh(for a large car battery) into the charging pad within a minute. And then you need to receive it on the other end - you don't have a plug, but obviously your receiver now has the same issue. You just moved where the problem is. I'd argue that having such an incredibly strong inductive field is a problem as well, but yeah, you're not even going to get that far. Parallel charging is potentially the answer - but even with 10 cables, for a 100kWh battery, you're still talking.....600kW per cable? CCS goes only up to 200kW(and those are THICK cables), so if you increase the charging speed to 3 minutes then yes, you could do it with 10 cables. 6 minutes with 5 cables, 30 minutes with one cable.....and we're(almost) back to what existing technology already allows?

nojokes 6y ago
The issue is that with current plug placement there must be a really hefty cable inside the car too. What about short range inductive charging from the bellow of the car (where the battery is)? With grid of 5x5 or 6x6 for example? Inductive charging because it would be very difficult to have any kind of plug below the car because of the high corrosion risk. Charger must align itself automatically to the right position and distance.

bryanlarsen 6y ago

Inductive chargers are ~80% efficient, compared to cables which are well over 99% efficient. Even though super efficient and despite electrical conductors being good heat conductors, the cable still needs active cooling to dump waste heat. Your inductive charger and the attached vehicle are going to have dump tens of kWh of heat in a few minutes, and will have to do it through air, without barbecuing the humans inside.

bryanlarsen 6y ago

Parallel charging is the current answer. https://insideevs.com/photo/5439695/mine-smart-ferry-fast-charging-inlets-plugs/ https://insideevs.com/photo/5439695/mine-smart-ferry-fast-ch...