{
  "$type": "site.standard.document",
  "description": "A secondary battery includes an electrode assembly including a wound structure of first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode, the electrode assembly including a through-hole at a winding core of the wound structure, a case…",
  "path": "/patents/1378173",
  "publishedAt": "2026-01-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M50/586",
    "SAMSUNG SDI CO., LTD."
  ],
  "textContent": "A secondary battery includes an electrode assembly including a wound structure of first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode, the electrode assembly including a through-hole at a winding core of the wound structure, a case having an opening at one side thereof, the case accommodating the electrode assembly, a cap assembly that seals the opening of the case, and an insulating sheet between the cap assembly and the electrode assembly, the insulating sheet including a main sheet and a protrusion on the main sheet, and the protrusion being inserted into the through-hole of the electrode assembly.",
  "title": "SECONDARY BATTERY"
}