{
  "$type": "site.standard.document",
  "description": "The present invention relates to a method for manufacturing a secondary battery comprising: a formation step for charging an assembled secondary battery to an SOC of 45% to 65%; an aging step for aging the secondary battery for which the formation has been completed; and a low voltage testing step…",
  "path": "/patents/1417552",
  "publishedAt": "2025-02-26T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01R31/3865",
    "LG ENERGY SOLUTION LTD [KR]"
  ],
  "textContent": "The present invention relates to a method for manufacturing a secondary battery comprising: a formation step for charging an assembled secondary battery to an SOC of 45% to 65%; an aging step for aging the secondary battery for which the formation has been completed; and a low voltage testing step for measuring the change in voltage value, wherein, in the low voltage testing step, a voltage value is measured in an SOC interval of 30% or lower. Since an SEI coating is stably formed in the method for manufacturing a secondary battery of the present invention, charging time is shortened and thus the secondary battery can be mass-produced. In addition, since a low voltage test is performed in an interval in which the voltage change rate per capacity of a negative electrode is high, a low voltage defect due to non-uniformity of the formation process can be detected in the method for manufacturing the secondary battery of the present invention.",
  "title": "METHOD FOR MANUFACTURING SECONDARY BATTERY"
}