{
  "$type": "site.standard.document",
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  "description": "A management server () receives a maximum value and a minimum value of the respective voltages (cell voltages) in a plurality of battery cells (A, A) configuring an electricity storage device () of a hydraulic excavator () from the hydraulic excavator (), and stores the maximum value and the…",
  "path": "/patents/1279513",
  "publishedAt": "2020-12-24T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "E02F9/2091",
    "Hitachi Construction Machinery Co., Ltd."
  ],
  "textContent": "A management server () receives a maximum value and a minimum value of the respective voltages (cell voltages) in a plurality of battery cells (A, A) configuring an electricity storage device () of a hydraulic excavator () from the hydraulic excavator (), and stores the maximum value and the minimum value in a storage device (A). Discharge characteristics of the electricity storage device () are stored in the storage device (A) in the management server (). A battery state estimation calculating unit (D) in the management server () calculates an estimation maximum value and an estimation minimum value of cell voltages in the present or in the future by adding the discharge characteristics stored in the storage device (A) to the latest maximum value and the latest minimum value of the cell voltages stored in the storage device (A). A management information producing unit (C) outputs information based upon the estimation maximum value and the estimation minimum value of the cell voltages calculated in the battery state estimation calculating unit (D).",
  "title": "Construction Machine Management System"
}