BATTERY MODULE

A battery module comprises a plurality of rechargeable batteries and a battery cover, wherein: the rechargeable batteries are disposed adjacent to each other; each of the rechargeable batteries has a battery case having a wall portion equipped with an open valve that is constructed so as to open when the inner pressure of the battery case rises up to a threshold value; and the battery cover faces the wall portion. The battery cover has a plurality of cover members provided side by side in a direction toward which the rechargeable batteries are disposed adjacent to each other. The cover members include at least adjacent first and second cover members. The first cover member has a first edge portion and the second cover member has a second edge portion overlapped with the first edge portion.