{
  "$type": "site.standard.document",
  "description": "The present invention relates to a cylindrical type secondary battery in which a center pin is inserted into a core of an electrode assembly and a cap assembly is coupled to an upper portion of a battery case so that the inserted center pin supports the electrode assembly in a radial direction on…",
  "path": "/patents/1401222",
  "publishedAt": "2026-04-29T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/04",
    "LG ENERGY SOLUTION LTD [KR]"
  ],
  "textContent": "The present invention relates to a cylindrical type secondary battery in which a center pin is inserted into a core of an electrode assembly and a cap assembly is coupled to an upper portion of a battery case so that the inserted center pin supports the electrode assembly in a radial direction on an inner circumferential surface of the core by elasticity, thereby preventing collapse of the core and increasing an adhesion force of positive and negative electrodes. [0002] The cylindrical type secondary battery according to the present invention includes a jelly-roll-type electrode assembly wound by interposing a separator between sheet-shaped positive and negative electrodes, a battery case in which the electrode assembly is accommodated, a cap assembly coupled to an upper portion of the battery case, and a center pin inserted into a core of the electrode assembly and configured to support the electrode assembly in a radial direction on an inner circumferential surface of the core by elasticity, wherein the center pin includes an elastic body having a length.",
  "title": "CYLINDRICAL TYPE SECONDARY BATTERY"
}