Yes, the heat pump is used to heat the batteries. The battery always kept above the minimum storage temperature, warmed before and during charging in cold weather, warmed more when driving in cold weather, and pre-heated to about 30C when navigating to a supercharger.So silly question, but this is only a large improvement in winter if you heat the cabin, correct? Does this also have a large efficiency improvement if you don't use cabin heat? (Maybe to heat the batteries?)
Heat-pumps can also cool. They can be used for both purposes and are more efficient then a dedicated heater or AC. They are not as fast in temperature change but they work very well.
Well, I'm not so sure.
Don’t air conditioners already work like heat pumps for purposes of cooling? I’d actually be curious as to why heat pumps have only been used for heating, not cooling, in BEVs so far, but I thought the general principle of how they worked was similar.Heat-pumps can also cool. They can be used for both purposes and are more efficient then a dedicated heater or AC. They are not as fast in temperature change but they work very well.
I have a heat-pump for my house that works from 19F-130F with no issues. It keeps my house between 68-75 all year. If it gets colder than 19F the heater turns on.
I would gladly trade the heater and AC in my Mach-E for a dual purpose heat-pump.
The heat pump is exactly like a home heat pump: it's also the air conditioning system. The additional weight and complexity is a valve system that (simplified) swaps the position of the evaporator and condenser.
Heat pumps are also useless for most of the northeast winter. I have a highly efficient heat pump at my home and, as is typical for heat pumps, count on auxiliary heat (I.e. electric) to kick in below 30-25).
the main point of the heat pump system is not really to scavenge heat generated by the motors but rather to scavenge heat from the ambient airWon't be nearly as effective on the Mach-e. Tesla's have induction motors to harvest heat from. the Perm magnet motors in the Mach-e don't generate as much heat so there is less to scavenge.