| 摘要 |
A lithium ion secondary battery (19), wherein a plurality of positive electrodes (31) and a plurality of negative electrodes (21) are laminated with separators being interposed therebetween, comprises a positive electrode tab (63) which is electrically connected to the plurality of positive electrodes (31) and is led out to the outside of the battery and a negative electrode tab (53) which is electrically connected to the plurality of negative electrodes (21) and is led out to the outside of the battery. The positive electrode (31) has a collector foil exposed portion (33) that is not coated with an active material. The exposed portion (33) is covered with an insulating material, and a portion of the positive electrode tab (63) arranged within the battery is covered with an insulating material. |
