Abstract: A thermal fin for a battery apparatus is configured to prevent thermal propagation between adjacent battery pack subassemblies. The thermal fin comprising a first and/or a second contact unit in facing contact with a first and a second battery pack subassembly. A supporting unit is sandwiched between the first and the second contact unit. The thermal fin extends in a fin plane, has a fin length in cross section along a longitudinal axis and a fin thickness. The thermal resistance within the fin plane is lower than the thermal resistance in a direction normal to the fin plane, such that the thermal fin performs a thermal management function and a thermal safety function of the battery apparatus.

Abstract: A self-piercing rivet with a head and a shank which has a shank diameter (Ds), wherein, at a foot end opposite the head, the shank has an axial recess which has an axial depth (LB), wherein the axial recess has a recess volume, wherein a ratio of recess volume to volume of the shank and the head is in the range of 0.06 to 0.08.

Abstract: Self-piercing rivet joint and self-piercing rivet for producing a joining connection between at least two components comprising a rivet head and a rivet shank having a central shank bore comprising a base, the rivet shank comprises a cylindrical shank outer surface and a shank inner surface limiting the central shank bore, the rivet shank comprises an annular piercing end facing away from the rivet head, the shank outer surface has a first diameter (Ds), the central shank bore comprises a bore depth (T) between the base of the central shank bore and the annular piercing end, wherein a ratio of the first diameter (Ds) to the bore depth (T) is in the range of 0.50?Ds/T?0.67.

Abstract: A riveted joint comprising: an upper workpiece and a lower workpiece, and a self-piercing rivet. The rivet in an undeformed state, before the creation of the riveted joint, included: a head defining a head diameter (DH); a shank defining a shank diameter (DS); and a foot end opposite the head. Radially outward at the foot end is a flat surface facing away from the head; and an axial recess located radially inward of the flat surface, partly defined in the foot end, open axially away from the head, and frustoconical in longitudinal cross section. The axial recess defining an axial depth (LB). The ratio of recess axial depth (LB) to shank diameter (DS) is less than 0.3. And in a deformed state, after the creation of the riveted joint, the rivet extends through the first workpiece and penetrates the second workpiece; and the head bears against the upper surface.

Abstract: A riveted joint comprising: an upper workpiece and a lower workpiece, and a self-piercing rivet. The rivet in an undeformed state, before the creation of the riveted joint, included: a head defining a head diameter (DH); a shank defining a shank diameter (DS); and a foot end opposite the head. Radially outward at the foot end is a flat surface facing away from the head; and an axial recess located radially inward of the flat surface, partly defined in the foot end, open axially away from the head, and frustoconical in longitudinal cross section. The axial recess defining an axial depth (LB). The ratio of recess axial depth (LB) to shank diameter (DS) is less than 0.3. And in a deformed state, after the creation of the riveted joint, the rivet extends through the first workpiece and penetrates the second workpiece; and the head bears against the upper surface.

Abstract: A self-piercing rivet for joining workpieces comprises: a head defining a head diameter, and a shank which defining a shank diameter. The shank on a foot end opposite to the head, partially defines an axial recess which has an axial depth. The shank further includes a flat surface portion or a circular cutter on the foot end. And an axial circular recess is partially defined in a transition portion between the head and the shank.

Abstract: A self-piercing rivet for joining a stack of at least two sheets of material. The rivet comprises a rivet head rotationally symmetrical to a central axis, and the rivet head includes a top side, a bottom side opposite the top side, and a cylindrical head exterior surface of a head diameter. The rivet head has a thickness (th) along the central axis. The rivet further comprises a rivet shank rotationally symmetrical to the central axis and including a cylindrical shank exterior surface and a cylindrical shank interior surface. The shank interior surface and the bottom side of the rivet head partially define a central shank hole that is open in an axial direction opposite to the bottom side of the rivet head. The rivet has an axial length (La) along the central axis, and the ratio between the head thickness and the axial length is between 1/7 and 1/22.

Abstract: A riveted joint comprising: an upper workpiece and a lower workpiece, and a self-piercing rivet. The rivet in an undeformed state, before the creation of the riveted joint, included: a head defining a head diameter (DH); a shank defining a shank diameter (DS); and a foot end opposite the head. Radially outward at the foot end is a flat surface facing away from the head; and an axial recess located radially inward of the flat surface, partly defined in the foot end, open axially away from the head, and frustoconical in longitudinal cross section. The axial recess defining an axial depth (LB). The ratio of recess axial depth (LB) to shank diameter (DS) is less than 0.3. And in a deformed state, after the creation of the riveted joint, the rivet extends through the first workpiece and penetrates the second workpiece; and the head bears against the upper surface.

Abstract: A punch rivet for joining two workpieces, has a head and a shank. The shank is a hollow shank with a shank internal diameter (D3), a shank external diameter (D1) and a shank end face. On the shank end face is a ring cutting edge with the diameter (D4) that is smaller than the shank external diameter (D1) but greater than the shank internal diameter (D3). The ring cutting edge is radially spaced both from the shank external diameter (D1) and from the shank internal diameter (D3) by at least 20% of the radial shank wall thickness (M5). And the ratio D3/D1 of shank internal diameter D3 to shank external diameter D1 is smaller than 0.6.

Abstract: A self-piercing rivet for connecting high-strength steels. The rivet having a head which has a head diameter (DH); a shank which has a shank diameter (DS); and, located at the foot end of the shank opposite the head, the shank has radially outward a flat surface section and radially inward an axial recess defining an axial depth (LB). The ratio of axial depth (LB) of the recess to the shank diameter (DS) is smaller than 0.3.

Abstract: A die for a joining tool for carrying out a joining method by clinching or punch riveting. The die including a die shank and a die head. The die head has a greater diameter than the die shank, and partially defines a forming recess on an axial side of the die head remote from the die shank . The die includes a first die element and a second die element, and the recess is formed in part by the first die element and in part by the second die element.

Abstract: A method and apparatus for forming an internal thread on a base body is disclosed. A threading tool that features in parts at least one section having a thread-forming structure is inserted into an opening in the base body, and then, the entire internal thread is formed in the base body by a maximum rotation of the threading tool of 360°.