Various aspects of the present invention relate to a vehicle seat assembly supportable on a floor of a vehicle having a battery pack disposed behind the vehicle seat, operable to help cool the battery pack, a vehicle battery pack cooling system, and a method of cooling a vehicle battery pack. In at least one embodiment, the vehicle seat assembly comprises a seat bottom comprising a structural support portion made of a first material and a foam seat cushion supported on the structural support portion, with the first material being more resilient than the foam. The structural support portion is supportable on the vehicle floor and, when supported on the floor, communicates with the vehicle floor to form an air flow passage extending under the seat bottom to provide air flow to the battery pack.