{
  "$type": "site.standard.document",
  "description": "An object of the present invention is to provide a technique that enables an internal resistance and a state of health of a battery to be measured at the same time in a short time by a simple method. A battery management device according to the invention acquires a first difference between a…",
  "path": "/patents/1399577",
  "publishedAt": "2026-02-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01R31/367",
    "HITACHI HIGH TECH CORP [JP]"
  ],
  "textContent": "An object of the present invention is to provide a technique that enables an internal resistance and a state of health of a battery to be measured at the same time in a short time by a simple method. A battery management device according to the invention acquires a first difference between a voltage at a first start time point after an end time point when charging or discharging is ended and the voltage at a first time point when a first period elapses after the first start time point, further acquires a second difference between the voltage at a second start time point after the first time point and the voltage at a second time point when a second period elapses after the second start time point, estimates an internal resistance according to a relationship between the first difference and the internal resistance of the battery, and estimates a state of health according to a relationship between the second difference and the state of health of the battery (see FIG. 7).",
  "title": "BATTERY MANAGEMENT DEVICE, BATTERY MANAGEMENT METHOD"
}