Secondary battery assembly

A secondary battery assembly including:

• a secondary battery including a wound electrode body enclosed in a flat rectangular case;
• a contact member partly contacting a side surface of the secondary battery, the side surface having a maximum area (hereinafter, referred to as “pressed surface”) of outer surfaces of the secondary battery;
• and a binding member for binding the secondary battery and the contact member, the binding member being configured to bind the contact member to partly press against the pressed surface,
• wherein the contact member includes:
• a plurality of contact parts arranged discretely, each contact part being in contact with the pressed surface;
• and
• a connecting part connecting the plurality of contact parts to one another,
• the contact parts are formed
• to protrude from the connecting part toward the pressed surface, and
• into an arrangement or a shape to press more weakly both one-side regions of the pressed surface corresponding to portions off a center of the wound electrode body in a winding axis direction, and to press more strongly a central region of the pressed surface between the one-side regions, the central region corresponding to a portion close to the center of the wound electrode body in the winding axis direction,
• wherein an area occupying ratio of the contact parts in correspondence to each of the one-side regions is smaller than an area occupying ratio of the contact parts in correspondence to the central region, the area occupying ratio of the contact parts in correspondence to each of the one-side regions being defined as a ratio of an area of the contact parts in each of the one-side regions to a total area of each of the one-side regions, and the area occupying ratio of the contact parts in correspondence to the central region being defined as a ratio of an area of the contact parts in the central region to a total area of the central region.