{
  "$type": "site.standard.document",
  "description": "Disclosed is an apparatus and method of evaluating an electrolyte impregnation level of a secondary battery. Specifically, electrolyte is injected into a case of the 3-electrode cell, and the 3-electrode cell is aged for a first time. Charging of the 3-electrode cell is initiated, and a first SOC…",
  "path": "/patents/1416802",
  "publishedAt": "2026-06-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01R31/378",
    "LG ENERGY SOLUTION LTD [KR]"
  ],
  "textContent": "Disclosed is an apparatus and method of evaluating an electrolyte impregnation level of a secondary battery. Specifically, electrolyte is injected into a case of the 3-electrode cell, and the 3-electrode cell is aged for a first time. Charging of the 3-electrode cell is initiated, and a first SOC voltage between the reference terminal and the positive electrode terminal at the first SOC is obtained. The 3-electrode cell is aged for 2 hours, and then an aging completion voltage between the reference terminal and the positive electrode terminal is obtained. Charging of the 3-electrode cell is resumed, and a second SOC voltage between the reference terminal and the positive electrode terminal at a second SOC is obtained. At least one of the first SOC voltage, a voltage difference between the first SOC voltage and the aging completion voltage, and a voltage difference between the first SOC voltage and the second SOC voltage is determined as an impregnation evaluation voltage. An electrolyte impregnation level corresponding to the impregnation evaluation voltage is identified from reference voltage information for a plurality of predefined electrolyte impregnation levels, and the identified electrolyte impregnation level is determined as an electrolyte impregnation level of the 3-electrode cell.",
  "title": "APPARATUS AND METHOD FOR EVALUATING ELECTROLYTE IMPREGNATION LEVEL OF SECONDARY BATTERY"
}