POWER STORAGE DEVICE

摘要

A power storage device wherein a housing case for housing an electrode group comprises a first main wall (11) and a second main wall (12) facing each other, a first side wall (13) and a second side wall (14) laterally linking the first main wall (11) and the second main wall (12) to each other, a top wall provided with an external terminal, and a bottom wall (16). The electrode group is housed in a housing case (1) in a state in which both end surfaces with respect to the direction in which positive electrode plates and negative electrode plates are layered face the inner surface of the first main wall (11) and the inner surface of the second main wall (12), respectively. A plurality of positive electrode tabs provided nearer the first side wall (13) than the positive electrode plates and a plurality of negative electrode tabs provided nearer the second side wall (14) than the negative electrode plates protrude from the end surface of the electrode group facing the top wall (15). A recess (17) indented to the position between the positive electrode tab and the negative electrode tab is formed on the top wall (15) of the housing case (1).