{
  "$type": "site.standard.document",
  "description": "An estimation device includes: a derivation unit () configured to derive a derivation history based on a current, a voltage of a lead-acid battery and a temperature of the lead-acid battery; a specifying unit () configured to specify one or more physical quantities based on the derivation history…",
  "path": "/patents/1330758",
  "publishedAt": "2022-11-03T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01R31/367",
    "GS Yuasa International Ltd."
  ],
  "textContent": "An estimation device includes: a derivation unit () configured to derive a derivation history based on a current, a voltage of a lead-acid battery and a temperature of the lead-acid battery; a specifying unit () configured to specify one or more physical quantities based on the derivation history, and one or more relationships selected from a first relationship between a first history and an amount of positive active material, a second relationship between a second history and a specific surface area of a positive electrode material, a third relationship between a third history and bulk density of the positive active material, a fourth relationship between a fourth history and positive active material particles in a cluster size, a fifth relationship between a fifth history and a cumulative amount of lead sulfate of a negative electrode material, a sixth relationship between a sixth history and a specific surface area of the negative electrode material, a seventh relationship between a seventh history and a corrosion amount of a positive electrode grid, an eighth relationship between an eighth history and resistivity of a positive electrode plate, and a ninth relationship between a ninth history and resistivity of a negative electrode plate; and an estimation unit () configured to estimate a degree of deterioration of the lead-acid battery.",
  "title": "ESTIMATION DEVICE, ESTIMATION METHOD, AND COMPUTER PROGRAM"
}