摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery in which a rolled type or lamination type electrode body is mounted in a battery case and the heat radiation performance of the electrode body is enhanced.SOLUTION: A secondary battery 100 has a rolled type or lamination type electrode body 120, a battery case 110 in which the electrode body 120 is mounted, a positive electrode terminal member 150 which is conducted to a positive electrode plate 121 and extends outwards so as to penetrate through the battery case 110, and a negative electrode terminal member 160 which is conducted to a negative electrode plate 131 and extends outwards so as to penetrate through the battery case 110. A separator 140 has a main body resin layer 141 and a heat transfer layer 143. The electrode body 120 has separator overlap portions 144, 145 in which the separators 140 are brought into close contact with one another in a thickness direction HT, but the positive electrode plate 121 and the negative electrode plate 131 are not overlapped with each other. The electrode body 120 further has heat transfer members 170, 180 which are different members from the positive electrode terminal member 150 and the negative electrode terminal member 160, pressed against and brought into thermal contact with the separator overlap portions 144, 145 of the electrode body 120, and also brought into thermal contact with the battery case 110, thereby transferring heat of the electrode body 120 to the battery case 110.SELECTED DRAWING: Figure 1 |