{
  "$type": "site.standard.document",
  "description": "Provided is a cylindrical lithium-ion battery including a negative cap and a cylindrical case. A jellyroll and a negative current collector are arranged inside the case. A sidewall of an end of the case is provided with an annular inwardly-concaved groove arranged circumferentially around a central…",
  "path": "/patents/1361536",
  "publishedAt": "2024-03-28T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M50/538",
    "EVE POWER CO., LTD."
  ],
  "textContent": "Provided is a cylindrical lithium-ion battery including a negative cap and a cylindrical case. A jellyroll and a negative current collector are arranged inside the case. A sidewall of an end of the case is provided with an annular inwardly-concaved groove arranged circumferentially around a central axis of the case, and forms an annular protrusion at the inside of the case. The negative current collector is connected to a negative electrode of the j ellyroll. A portion, located below the annular inwardly-concaved groove, of the case is bent to form an annular engaging groove, an opening of the annular engaging groove faces the interior of the case, the periphery of the negative cap is arranged in the annular engaging groove, and a bottom surface of the negative cap and the annular engaging groove are connected in a sealed manner by laser welding.",
  "title": "CYLINDRICAL LITHIUM-ION BATTERY"
}