| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device which can suppress increase in the number of components and prevent tabs from being broken when the tabs and a conductive member of an electrode assembly are resistance-welded.SOLUTION: An electrode assembly 12 has a laminated structure in which a positive electrode 14 and a negative electrode 15 are insulated to each other, in which the positive electrode 14 includes a plurality of positive electrode tabs 14b, 17a, and 18a which are laminated to be resistance-welded to a conductive member for positive electrode 24 via which a positive electrode terminal 21 is electrically connected with the positive electrode tabs 14b, 17a, and 18a. The negative electrode 15 includes a plurality of negative electrode tabs 15b, 19a, and 20a which are laminated to be resistance-welded to a conductive member for negative electrode 25 via which a negative electrode terminal 22 is electrically connected with the negative electrode tabs 15b, 19a, and 20a. An outermost positive electrode tabs 17a and 18a and the negative electrode tabs 19a and 20a are formed thicker than the other positive electrode tab 14b or the negative electrode tab 15b, and the positive electrode tab 18a positioned at the opposite side of the conductive member for positive electrode 24 and a negative electrode tab 20a positioned at the opposite side of the conductive member for negative electrode 25 have deformation restraining means along an outer periphery of a weld nugget. |
