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Could electric car battery use a dual type battery pack to optimize charging and range?

• bradleyland 14y ago
  You could do that, but energy density is the key metric here. Energy density determines the size of the battery required to store a specific amount of energy. There's only so much space in the car, and you also have to factor in that any battery that will be moved by its own power loses efficiency with lower energy density. You've got a huge battery to move, and physics dictate that accelerating this battery is going to use more energy. So, let's say you split this hybrid battery 50/50, your quick charge-discharge battery quickly becomes too small to deliver meaningful range, and you've given up space that could be used for the traditional battery.
• chongli 14y ago
  The Tesla Model S already uses 7000 individual battery cells. This is how it's able to charge as quickly as it does with the supercharger. The main limitation of household charging is lack of power.
  • reportingsjr 13y ago
    That isn't necessarily true. Them using small batteries to make a larger battery is what allows them to make their car sized batteries cheaper, since the smaller sized batteries are already mass produced for things like laptops. For charging time it depends on how those batteries are connected.