Patent ID: 8810080
Filing Date: 2014-08-19
Classification: B60L,H01M,Y02E,Y02P,Y02T

Abstract:
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 from the unit modules and the supporting bars, and wherein each of the end plates is configured such that an area of each of the end plates is increased in order of the top wall, the side walls, and the bottom wall.