| 摘要 |
PROBLEM TO BE SOLVED: To ensure sealability of a case even if a power storage device fixed to a lid via a seal member, in a state where a penetration member is penetrating a hole formed in the lid, is subjected to vibration for a long period, when the case is made of an aluminum-based metal.SOLUTION: In a secondary battery 10, a lid 14 is welded to the case body 13 in a state where an electrode assembly 12 is housed in a case 11 constituted of the case body 13 having an opening 13a through which the electrode assembly 12 can be inserted, and the lid 14 closing the opening 13a. The case body 13 and lid 14 are made of an aluminum-based metal, the lid 14 has an electrode terminal attachment hole 14b which a penetration member, i.e., a positive electrode terminal 15 or a negative electrode terminal 16, penetrates. The penetration member is fixed to the lid 14 via a seal member 22, with the seal member 22 being compressed in the axial direction. A nitride layer 30 having a heat conductivity of 150 W/(m K) or more is formed on at least one surface around the electrode terminal attachment hole 14b. |
