{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
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  "description": "The present invention provides a method for inspecting the state of welds in a battery, the state of welds being inspected for a battery having: a tap or current collection plate welded to a current collector of an electrode assembly in which the current collector and separation film have been…",
  "path": "/patents/1396909",
  "publishedAt": "2025-08-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B23K31/12",
    "LG ENERGY SOLUTION LTD [KR]"
  ],
  "textContent": "The present invention provides a method for inspecting the state of welds in a battery, the state of welds being inspected for a battery having: a tap or current collection plate welded to a current collector of an electrode assembly in which the current collector and separation film have been wound or stacked; and a can housing or electrode lead welded to the tap or current collector plate. The method comprises: a first impedance measurement step for measuring first impedance by applying, prior to injecting electrolyte into a battery, alternating current or alternating voltage at a set frequency band; a first Cole-Cole plot preparation step for preparing a first Cole-Cole plot on the basis of the first impedance; and a primary state of welds determination step for determining the state of welds of the battery on the basis of x fractional value on the first Cole-Cole plot.",
  "title": "METHOD FOR INSPECTING STATE OF WELDS IN BATTERY"
}