{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "A detection device according to the present disclosure is a detection device for detecting a status of a lithium-ion secondary battery, the detection device including a control module that acquires real part of AC impedance at a frequency at which the real part of the AC impedance is increased 10…",
  "path": "/patents/1385539",
  "publishedAt": "2026-06-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01N27/02",
    "KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO"
  ],
  "textContent": "A detection device according to the present disclosure is a detection device for detecting a status of a lithium-ion secondary battery, the detection device including a control module that acquires real part of AC impedance at a frequency at which the real part of the AC impedance is increased 10 times or more than the real part of the AC impedance at 1 KHz due to a skin effect, and that detects deposition of lithium and/or the presence of foreign metal inside the lithium-ion secondary battery by using the acquired real part of the AC impedance.",
  "title": "DETECTION DEVICE, MANAGEMENT DEVICE, AND DETECTION METHOD"
}