Battery module of excellent structural stability

摘要

Disclosed is a battery module including a base plate on which unit modules, each with two or more secondary batteries therein, are stacked in a vertically erected state, a pair of end plates disposed in tight contact with outer surfaces of outermost unit modules while bottoms of the end plates are fixed to the base plate, and supporting bars connected between opposite sides of upper or side parts of the end plates so as to support the end plates, wherein each of the end plates includes a main body contacting a corresponding one of the unit modules, and a top wall, a bottom wall, and a pair of side walls protruding outward from the perimeter of the main body, the thickness of each of the side walls being increased from the top to the bottom wall, thereby dispersing pressure (bending load) from the unit modules and the supporting bars.

主权项

1. A middle or large-sized battery module comprising secondary batteries or unit modules, each of which has two or more secondary batteries mounted therein, stacked while being erected vertically, the battery module comprises:
a base plate on which the unit modules are stacked in a vertically erected state; a pair of end plates disposed in tight contact with outer surfaces of the outermost unit modules while bottoms of the end plates are fixed to the base plate; and supporting bars connected between opposite sides of upper parts or side parts of the end plates so as to support the end plates, wherein each of the end plates comprises a main body contacting a corresponding one of the unit modules, and a top wall, a bottom wall, and a pair of side walls protruding outward from a perimeter of the main body, a thickness of each of the side walls being increased from the top wall to the bottom wall, thereby dispersing pressure (bending load) from the unit modules and the supporting bars, the bottom wall extending the entire length of the bottom of the end plate and the bottom wall remaining in contact with the base plate throughout the entire length of the bottom wall, the corners of each of the end plates are chamfered, and the corners of each of the end plates are integrally formed.