{
  "$type": "site.standard.document",
  "description": "A method of manufacturing an electricity storage device includes a first preparing step of preparing a case body including an open end, a second preparing step of preparing a sealing plate for sealing the open end of the case body, an assembling step of attaching the sealing plate to the open end…",
  "path": "/patents/1382772",
  "publishedAt": "2026-05-14T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M50/169",
    "Prime Planet Energy & Solutions, Inc."
  ],
  "textContent": "A method of manufacturing an electricity storage device includes a first preparing step of preparing a case body including an open end, a second preparing step of preparing a sealing plate for sealing the open end of the case body, an assembling step of attaching the sealing plate to the open end of the case body, and a welding step of welding the case body and the sealing plate by applying a laser beam along a boundary between the case body and the sealing plate. The sealing plate prepared in the second preparing step includes a recessed portion recessed downwardly in a circumferential end portion of an upper surface of the sealing plate. In the welding step, a laser beam is applied to the recessed portion of the sealing plate to weld the case body and the sealing plate.",
  "title": "METHOD OF MANUFACTURING ELECTRICITY STORAGE DEVICE"
}