CYLINDRICAL BATTERY AND BATTERY MODULE

To provide a cylindrical battery capable of suppressing the generation of a short circuit in a manufacturing step.SOLUTION: A cylindrical battery comprises: a shaft center member; a winding electrode group 12 in which an electrode lamination body in which a positive electrode and a negative electrode are laminated via an electrolyte is wound around the shaft center member; an outer casing member 15 that winds the winding electrode group 12; a first lid member 16A that is arranged to one end part of a shaft center direction of the shaft center member, and is electrically connected to one of the positive electrode and the negative electrode; and an insulation member 17 that is arranged between the outer casing member 15 and the first lid member 16A. An outer diameter of the first lid member 16A is larger than an inner diameter of the outer casing member 15, and is smaller than an outer diameter of the outer casing member 15. The outer diameter of the insulation member 17 is larger than the outer diameter of the first lid member 16A. The insulation member 17 includes a first projection part 17a projected toward the winding electrode group 12 in an inner side of the winding electrode group 12 in a radial direction from an inner surface of the outer casing member 15.SELECTED DRAWING: Figure 3 【課題】製造工程における短絡の発生を抑制することが可能な円筒型電池を提供する。【解決手段】円筒型電池は、軸心部材と、軸心部材の周りに、電解質を介して正極および負極が積層されている電極積層体が巻回されている巻回電極群１２と、巻回電極群１２を巻回している外装部材１５と、軸心部材の軸心方向の一方の端部に配置されており、正極および負極の一方と電気的に接続されている第１蓋部材１６Ａと、外装部材１５と第１蓋部材１６Ａとの間に配置されている絶縁部材１７と、を備える。第１蓋部材１６Ａの外径は、外装部材１５の内径よりも大きく、外装部材１５の外径よりも小さい。絶縁部材１７の外径は、第１蓋部材１６Ａの外径よりも大きい。絶縁部材１７は、外装部材１５の内面よりも巻回電極群１２の径方向の内側に、巻回電極群１２に向かって突出している第１突出部１７ａを有する。【選択図】図３