{
  "$type": "site.standard.document",
  "description": "A method of estimating a state of a battery cell provided in a battery pack includes obtaining, from a radio frequency (RF) antenna provided at opposite ends of the battery cell and configured to transmit and receive an RF signal, data regarding a phase and an amplitude of the RF signal…",
  "path": "/patents/1407573",
  "publishedAt": "2026-06-16T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/48",
    "SAMSUNG SDI CO., LTD."
  ],
  "textContent": "A method of estimating a state of a battery cell provided in a battery pack includes obtaining, from a radio frequency (RF) antenna provided at opposite ends of the battery cell and configured to transmit and receive an RF signal, data regarding a phase and an amplitude of the RF signal, calculating an expansion coefficient of a jelly roll inside the battery cell based on the data regarding the phase and the amplitude of the RF signal, and estimating a state of the battery cell based on the expansion coefficient of the jelly roll. Corresponding apparatus and non-transitory computer-readable medium are also provided.",
  "title": "Method, apparatus and computer-readable medium for estimating state of battery using radio frequency signal"
}