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Cylindrical cell with contact lugs

專利號
US11178767B2
公開日期
2021-11-16
申請人
VARTA Microbattery GmbH(DE Ellwangen Jagst)
發(fā)明人
Marc Oliver Nestle; Sunil Siddannavar
IPC分類
H05K1/00; H05K1/14; H01M50/109; H01M50/543
技術(shù)領域
lug,subsection,contact,cell,section,in,expansion,housing,conductor,face
地域: Ellwangen Jagst

摘要

A cylindrical cell includes a. a cylindrical housing enclosing an interior space and composed of a first and a second metal housing part, wherein the housing includes, at its axial ends, a first planar end face and a second planar end face connected to one another by an annular casing, b. a positive electrode and a negative electrode, at least one of which can intercalate and/or deintercalate lithium ions, wherein the positive electrode electrically connects to the first housing part directly or via a separate electrical conductor, and the negative electrode electrically connects to the second housing part directly or via a separate electrical conductor, c. a first contact lug configured as a sheet-metal part that is welded onto the first end face and which has a planar section extending in a plane parallel to the first end face, and d. a second contact lug configured as a sheet-metal part that is welded onto the second end face and has a planar subsection extending in a plane parallel to the second end face and has a subsection angled away from the plane and extends as far as into the plane of the planar section, wherein the angled-away subsection includes an expansion section in which the second contact lug expands in the main direction of extent in a targeted and predictable manner under a defined tensile loading in its main direction of extent.

說明書

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  • c. The two conductor tracks or the two strip-like conductors or the two conductors with a round cross section are bent in opposite bending directions in the expansion section.
  • d. The second contact lug is of O-shaped design in the expansion section or comprises a lower section designed in this way within the expansion section.
  • With preference, at least the features a. and b immediately above, preferably even the features a. to c. immediately above, particularly preferably even the features a. to d. immediately above, are implemented in combination with one another.

    Further particularly preferably, the cell is additionally distinguished by at least one of the immediately following a. and b.:

      • a. The first contact lug comprises a contact section that can be angled away or is angled away from the plane of the planar section.
      • b. The contact section of the first contact lug points in the same direction as the contact section of the second contact lug.

    With preference, the features a. and b immediately above are implemented in combination with one another.

    Further particularly preferably, the cell is additionally distinguished by at least one of the immediately following a. to c.:

      • a. The cell has a diameter of 5 mm to 50 mm, preferably 5 mm to 25 mm.
      • b. The cell has a height of 3 mm to 50 mm.

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