{
  "$type": "site.standard.document",
  "description": "A method for producing a nonaqueous electrolyte secondary battery, and a production system therefor, that allow forming a SEI film in a shorter time. The method includes assembly, initial charging, and high-temperature aging steps. At least one from the initial charging and the high-temperature…",
  "path": "/patents/1344307",
  "publishedAt": "2023-05-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/446",
    "TOYOTA JIDOSHA KABUSHIKI KAISHA"
  ],
  "textContent": "A method for producing a nonaqueous electrolyte secondary battery, and a production system therefor, that allow forming a SEI film in a shorter time. The method includes assembly, initial charging, and high-temperature aging steps. At least one from the initial charging and the high-temperature aging has the following sub-steps: a step of performing an AC impedance measurement on the battery and, on the basis of the AC impedance measurement, calculating an ionic conductivity of an SEI film that is formed the surface of a negative electrode of the battery; and a step of determining whether the calculated ionic conductivity falls within a predetermined range or not, and terminating the initial charging step or the high-temperature aging step when the ionic conductivity falls within the predetermined range, and continuing the initial charging step or the high-temperature aging step when the ionic conductivity does not fall within the predetermined range.",
  "title": "METHOD AND SYSTEM FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY\nBATTERY"
}