{
  "$type": "site.standard.document",
  "description": "A battery management device includes a high-frequency signal supply unit configured to apply a high-frequency signal having a frequency equal to or higher than 0.1 MHz to a first battery cell having a low battery temperature among a plurality of battery cells constituting a lithium-ion secondary…",
  "path": "/patents/1389595",
  "publishedAt": "2026-06-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01R31/389",
    "TOYOTA JIDOSHA KABUSHIKI KAISHA"
  ],
  "textContent": "A battery management device includes a high-frequency signal supply unit configured to apply a high-frequency signal having a frequency equal to or higher than 0.1 MHz to a first battery cell having a low battery temperature among a plurality of battery cells constituting a lithium-ion secondary battery, an impedance detection unit configured to detect a real part of alternating current impedance of the first battery cell to which the high-frequency signal is applied, and a determination unit configured to determine whether Li has been precipitated in the lithium-ion secondary battery based on the real part of the alternating current impedance of the first battery cell.",
  "title": "BATTERY MANAGEMENT DEVICE, BATTERY MANAGEMENT METHOD, AND NON-TRANSITORY STORAGE MEDIUM"
}