{
  "$type": "site.standard.document",
  "description": "An apparatus for estimating a state of a secondary battery by using an Extended Kalman Filter is provided, in which the secondary battery includes a positive electrode including a first positive electrode material and a second positive electrode material having different operating voltage ranges…",
  "path": "/patents/939001",
  "publishedAt": "2016-08-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L58/10",
    "LG CHEMICAL LTD [KR]"
  ],
  "textContent": "An apparatus for estimating a state of a secondary battery by using an Extended Kalman Filter is provided, in which the secondary battery includes a positive electrode including a first positive electrode material and a second positive electrode material having different operating voltage ranges from each other, a negative electrode including a negative electrode material, and a separator interposed therebetween. The apparatus includes a sensor unit which measures voltage and current of the secondary battery at time intervals, and a control unit electrically connected with the sensor unit, and estimates the state of the secondary battery including a state of charge of at least one of the first positive electrode material, the second positive electrode material, or the negative electrode material, by implementing an Extended Kalman Filter algorithm using a state equation including, as a state parameter, the state of charge of at least one of the first positive electrode material, the second positive electrode material, or the negative electrode material, and an output equation including, as an output parameter, the voltage of the secondary battery. The state equation and the output equation are derived from a circuit model which includes a first positive electrode material circuit unit and a second positive electrode material circuit unit connected in parallel with each other, and a negative electrode material circuit unit connected in series with these two circuit units.",
  "title": "APPARATUS FOR ESTIMATING STATE OF SECONDARY BATTERY INCLUDING BLENDED POSITIVE ELECTRODE MATERIAL AND METHOD THEREOF"
}