| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealed battery in which adhesion between a lid and a dielectric plate and between the dielectric plate and a conductive member can be improved, and adhesive fixation of the dielectric plate between the lid and the conductive member can be checked.SOLUTION: A lithium ion secondary battery includes a battery case for housing a wound electrode body internally, a lid 16 being bonded to th aperture of the battery case, a rivet 53 inserted into the lid 16 and connecting a positive electrode terminal provided in the lid 16 and the wound electrode body electrically, and a dielectric plate 90 interposed between the lid 16 and the rivet 53 and insulating the lid 16 and the rivet 53. On the contact surfaces of the dielectric plate 90 with the lid 16 and the rivet 53, first protrusions 93, 93 are formed at positions visible from the outside, in a state where the dielectric plate 90 is fixed tightly between the lid 16 and the rivet 53. |
