Electric Vehicle Battery System

A battery bay configured to be disposed at an underside of an at least partially electric vehicle, the battery bay comprising:

• a means for storing electrical energy;
• and
• a means for retaining the means for storing electrical energy at an underside of the vehicle by rotating the means for retaining into contact with the means for storing electrical energy about an axis substantially parallel with a plane formed by the underside of the vehicle.

A battery pack for removably attaching to an underside of an at least partially electric vehicle, the battery pack comprising:

• at least one rechargeable battery cell that stores electrical energy;
• and
• a housing at least partially enclosing the at least one rechargeable battery cell, wherein a portion of the housing includes a heat exchange mechanism that has at least a portion thereof exposed to ambient air at the underside of the vehicle when the battery pack is attached to the vehicle.

A method of removing a battery pack from an underside of an at least partially electric vehicle, comprising:

• rotating a latch mechanism mechanically coupled to a vehicle so as to disengage contact between the latch and a battery pack disposed at an underside of an at least partially electric vehicle;
• and
• translating the battery pack away from the underside of the vehicle.