{
  "$type": "site.standard.document",
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  "description": "A secondary battery improves current collection efficiency. A positive electrode current collector plate and a negative electrode current collector plate each include weld groups that are provided radially. A positive electrode active material uncovered part includes a first weld that is nearest to…",
  "path": "/patents/1353625",
  "publishedAt": "2023-10-26T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M50/536",
    "MURATA MANUFACTURING CO., LTD."
  ],
  "textContent": "A secondary battery improves current collection efficiency. A positive electrode current collector plate and a negative electrode current collector plate each include weld groups that are provided radially. A positive electrode active material uncovered part includes a first weld that is nearest to a winding termination end of a positive electrode foil, and a second weld that is second nearest to the winding termination end of the positive electrode foil after the first weld. A negative electrode active material uncovered part includes a third weld that is nearest to a winding termination end of a negative electrode foil, and a fourth weld that is second nearest to the winding termination end of the negative electrode foil after the third weld. The secondary battery satisfies Expressions (1) and (2) below: 0≤LC1≤LC2 (1) 0≤LA1≤LA2 (2) where LC represents a distance from the winding termination end of the positive electrode foil to the first weld in millimeters, LC represents a distance from the first weld to the second weld in millimeters, LA represents a distance from the winding termination end of the negative electrode foil to the third weld in millimeters, and LA represents a distance from the third weld to the fourth weld in millimeters.",
  "title": "SECONDARY BATTERY, ELECTRONIC EQUIPMENT, AND ELECTRIC TOOL"
}