{
  "$type": "site.standard.document",
  "description": "A battery management device according to the present disclosure includes a high-frequency signal supplying unit applying a high-frequency signal with a frequency of 0.1 MHz or higher to a lithium-ion secondary battery, a storage unit storing a real part of alternating current impedance of the…",
  "path": "/patents/1389765",
  "publishedAt": "2026-06-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/425",
    "TOYOTA JIDOSHA KABUSHIKI KAISHA"
  ],
  "textContent": "A battery management device according to the present disclosure includes a high-frequency signal supplying unit applying a high-frequency signal with a frequency of 0.1 MHz or higher to a lithium-ion secondary battery, a storage unit storing a real part of alternating current impedance of the lithium-ion secondary battery to which the high frequency signal is applied at a first point in time, as a reference value for each battery temperature, an impedance detecting unit detecting the real part of the alternating current impedance of the lithium ion secondary battery to which the high frequency signal is applied at a second point in time after the first point in time, at a certain battery temperature, and a determining unit determining whether there is deposition of lithium in the lithium ion secondary battery, based on the real part of the alternating current impedance detected and the reference value at the battery temperature.",
  "title": "BATTERY MANAGEMENT DEVICE"
}