Hermetically sealed battery
A hermetically sealed battery includes a battery can having a bottomed cylindrical shape and an opening, an electrode body accommodated in the battery can, a sealing plate covering the opening of the battery can, a rivet disposed on the sealing plate and serving as a terminal, an insulator insulates the sealing plate from the rivet, and an internal lead electrically connected to the rivet. The insulator includes a sealing part sealing between the sealing plate and the rivet and a plate part closer to the electrode body than the sealing part, the plate part being extended in a radial direction of the electrode body. The plate part has a cut-away portion recessed in a periphery of the plate part in the radial direction. The internal lead is partially disposed in the cut-away portion.
1. A hermetically sealed battery comprising:
a battery can having a bottomed cylindrical shape and an opening;
an electrode body accommodated in the battery can;
a sealing plate covering the opening of the battery can;
a rivet disposed on the sealing plate and serving as a terminal;
an insulator insulates the sealing plate from the rivet; and
an internal lead electrically connected to the rivet, wherein
the insulator includes:
a sealing part sealing between the sealing plate and the rivet; and
a plate part closer to the electrode body than the sealing part, the plate part being extended in a radial direction of the electrode body,
the plate part has a cut-away portion recessed in a periphery of the plate part in the radial direction, and
the internal lead is partially disposed in the cut-away portion.
2. The hermetically sealed battery according to claim 1 , wherein the plate part includes a sloped portion, a point on the sloped portion approaching the electrode body as the point shifting outward in the radial direction.
3. The hermetically sealed battery according to claim 2 , wherein the plate part further includes a flange portion bent from the sloped portion and extended outward in the radial direction.
4. The hermetically sealed battery according to claim 3 , wherein the flange portion has a through-hole provided therein.