Dual chargers & segmented battery for reduced charge time?

[Nuclear Fusion]

I think the Tesla Semi was doing this, no?
Why doesn’t the idea have merit for passenger cars?

 

[rhaekar]

Waste of money. Most people charge over night so the on board charger is more that sufficient.

Some older model S had dual chargers but it was phased out.

 

[mongo]

I think the Tesla Semi was doing this, no?
Why doesn’t the idea have merit for passenger cars?

Charge rate limit (kW) is relative to pack size (kWh). Splitting the pack reduces the power you can put into each pack.
Semi pack is large enough that the current in the charge cable is a limiting factor (and it may run 4 isolated pack/ drive unit systems)

For cars, the pack size does not require (or benefit from) splitting. One 100kWh pack charging at 120kW would be two 50 kWh pack each charging at 60kW (120kW total). It would not become two 50kWh packs each charging at 120kWh.

 

[ewoodrick]

I think the Tesla Semi was doing this, no?
Why doesn’t the idea have merit for passenger cars?

• How often do you think that this would be needed?
• You don't have this amount of power in residences.
• It's not exactly cheap to get this amount of power at commercial locations.