Patent ID: 11749837

Abstract:
In a battery pack disclosed herein, a plurality of single cells are aligned in an alignment direction. In this battery pack, a spacer is disposed in a gap between adjacent ones of the single cells, and a convex rib is formed on the spacer. In a flat surface of each single cell, a region where the rib is in contact is a confined region, and a region where the rib is not in contact is a non-confined region. In the non-confined region within the battery case, an internal pressure adjusting bag filled with a gas is housed. In addition, gas supplying means (soluble part) for supplying the gas held in the internal pressure adjusting bag to an internal space of the battery case is provided. Thus, a negative pressure within the single cell is removed, and deterioration of high-rate performance otherwise caused by outflow of an electrolyte can be prevented.