Connection element for electrically connecting a fluid-coolable individual line, fluid-coolable individual line unit, and charging cable

A fluid-coolable individual line unit for a charging cable, comprising

• a first connection element, said first connection element including:
• an electrically conductive housing,
• a sleeve-shaped compression section,
• the electrically conductive housing having an internal cooling channel with a connection opening for an external cooling line, said cooling channel leading into a space surrounded by the sleeve-shaped compression section,
• the connection element furthermore comprising a counterpressure element, which can lie at least partially in the space surrounded by the sleeve-shaped compression section,
• an individual line having a first and a second end, the individual line comprising:
• a concentric conductor arrangement,
• at least one central channel for a cooling fluid, which is enclosed by the conductor arrangement, and
• an insulation directly enclosing the conductor arrangement, said insulation being impenetrable and electrically insulating for the cooling fluid, and
• a first stripped end piece at the first end of the individual line, on which the insulation is axially set back with respect to the conductor arrangement,
• wherein an inner circumferential surface of the compression section of the first connection element is in a radial compression joint with the conductor arrangement on the stripped end piece, as a result of which an electrical connection between the connection element and the concentric conductor arrangement is established,
• wherein the counterpressure element is arranged in the central channel of the individual line so that it lies at least partially in the space surrounded by the sleeve-shaped compression section, and supports the concentric conductor arrangement on the inside thereof and, at the same time, is in a compression joint with the concentric conductor arrangement, said counterpressure element permitting a fluid connection through the central channel of the individual line between the internal cooling channel of the first connection element and the second end of the individual line,
• wherein the individual line comprises a support structure in the form of a helix, which is arranged in the central channel and has a longitudinal extent which is directly enclosed by the conductor arrangement, said helical support structure being arranged along said counterpressure element and between the counterpressure element and the sleeve-shaped compression section, and
• wherein a sealing means in the form of a flexible hose is partially arranged on the sleeve-shaped compression section and partially on the insulation in the area of the first end of the individual line to create a fluid-tight connection between the sleeve-shaped section and the insulation.