{
  "$type": "site.standard.document",
  "description": "An object of the present disclosure is to provide a battery module including a plurality of battery groups each having a plurality of battery cells connected in parallel, the plurality of battery groups being connected in series by bus bars, for which a clad material is not used and thus dissimilar…",
  "path": "/patents/1296041",
  "publishedAt": "2021-07-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M50/522",
    "Vehicle Energy Japan Inc."
  ],
  "textContent": "An object of the present disclosure is to provide a battery module including a plurality of battery groups each having a plurality of battery cells connected in parallel, the plurality of battery groups being connected in series by bus bars, for which a clad material is not used and thus dissimilar metal welding can be avoided. To achieve the object, a first bus bar P mainly contains aluminum and is connected to positive electrode terminals of a plurality of battery cells of each battery group via welding joint portions W. A second bus bar N mainly contains copper and is connected to negative electrode terminals of the plurality of battery cells of each battery group via welding joint portions W. The first bus bar P of one of the mutually adjacent battery groups of the plurality of battery groups is connected to the second bus bar N of the other battery group via a mechanical joint portion M.",
  "title": "Battery Module"
}