| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealing material for a battery, in which thermal damage on PFA is taken into account in cases where PFA is adopted as a material of a sealing material.SOLUTION: A sealing material for a battery is used in a sealed battery in which an opening of a case storing an electrode body is closed with a lid to seal the inside of the case, a terminal is led out to the outside via the lid, and the terminal is fixed to the lid via a sealing material by crimping the terminal while the sealing material is disposed between the terminal and the lid. The material of the sealing material is PFA, the PFA has a specific gravity of 2.15 or more, and the surface roughness of at least a sealed part is 0.05 [μm] or less. |
