{
  "$type": "site.standard.document",
  "description": "The present invention relates to: a welding method and a welding apparatus for a secondary battery capable of emitting a laser beam into the lower can; and a monitoring method and a monitoring apparatus for a secondary battery welding process capable of checking a welded state during the welding…",
  "path": "/patents/1399359",
  "publishedAt": "2024-11-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B23K26/21",
    "LG ENERGY SOLUTION LTD [KR]"
  ],
  "textContent": "The present invention relates to: a welding method and a welding apparatus for a secondary battery capable of emitting a laser beam into the lower can; and a monitoring method and a monitoring apparatus for a secondary battery welding process capable of checking a welded state during the welding. [0002] The welding apparatus according to the present invention comprises: a laser irradiation apparatus for welding an electrode tab to a lower can by emitting a laser beam to a center hole of the electrode assembly; and a jig for protecting the electrode assembly when the laser beam is emitted. [0003] The monitoring apparatus according to the present invention comprises the jig and the laser irradiation apparatus, and the laser irradiation apparatus comprises a welding laser irradiation device, an illumination laser irradiation device, and an image sensor. Here, the welding laser beam and the illumination laser beam are emitted vertically from a top side of the center hole.",
  "title": "WELDING METHOD AND WELDING APPARATUS FOR SECONDARY BATTERY, AND MONITORING METHOD AND MONITORING APPARATUS FOR SECONDARY BATTERY WELDING PROCESS"
}