Battery pack with improved vibration resistance

A battery pack comprising:

• a housing having a bottom wall, end walls spaced from each other by a first distance in a first direction and side walls to form a space portion;
• an end plate received in the space portion, the end plate comprising a horizontal plate located parallel to the bottom wall of the housing and a pair of vertical plates spaced from each other by a second distance in the first direction and extending from opposite edges of the horizontal plate in a perpendicular direction;
• a plurality of cell cartridges received in the end plate so as to be vertically disposed;
• a plurality of pairs of first recessed portions facing each other provided in an inner surface of the side walls;
• and
• protrusions configured to be coupled to the plurality of pairs of first recessed portions provided on opposite ends of the cell cartridges in a thickness direction,
• wherein the first distance is greater than the second distance,
• wherein the plurality of cell cartridges are stacked in the first direction,
• wherein the first vertical plate is located spaced apart from a first end wall of the housing by a predetermined distance to form a first space portion,
• wherein the second vertical plate is located spaced apart from a second end wall of the housing by a predetermined distance to form a second space portion,
• wherein the horizontal plate is provided at a lower surface thereof with a bolt extending a predetermined length,
• wherein the bolt is positioned between the pair of vertical end plates of the end plate,
• wherein a first fastening hole configured to receive the bolt is formed in the bottom wall of the housing,
• wherein the bolt passes through the first fastening hole, and
• wherein a nut is fastened to an end of the bolt.