Patent ID: 8701810

Claim:
A battery pack mounted on a vehicle, the vehicle having a left side, a right side, a front side, and a back side, the vehicle having a widthwise direction extending from the left side of the vehicle to the right side of the vehicle, and a longitudinal center line extending from a center of the front side of the vehicle to a center of the back side of the vehicle, the battery pack having a length greater than a width, the battery pack comprising: a battery stack; and an equipment region, wherein the battery pack is formed of a single battery case having an upper case and a lower case; wherein the equipment region is formed from a first box and a second box, wherein the first box includes a fan configured to supply a cooling medium for adjusting the temperature of the battery stack; wherein a length direction of the battery pack is parallel to the widthwise direction of the vehicle; wherein the battery stack, the first box, and the second box are arranged in the length direction of the battery pack, and the length direction extends from the first box disposed on a side of the battery stack to the second box disposed on an opposite side of the battery stack; wherein a weight of the first box and a weight of the second box are essentially equal to each other to balance the weight of the battery pack over a weight centroid of the battery pack; and wherein the weight centroid of the battery pack is located on the longitudinal center line of the vehicle.