US-12620757-B2 - High-current connection clamping screw device as well as electrical high-current connector and high-current line connector

Abstract

A clamping screw device has a clamping screw extending in an axial direction and including a screw head that is rotatable, a screw body, and a screw foot. The clamping screw device has an electrical insulation on an outside of the screw head. The electrical insulation accommodates an electromagnetic shielding and/or a seal.

Inventors

• Heiko Wolfschmitt
• Richard A. FORELL
• Joachim Schneider
• Wolfgang Balles
• Walter Saenger
• Manuel Eheim

Assignees

• TE CONNECTIVITY GERMANY GMBH

Dates

Publication Date

20260505

Application Date

20220913

Priority Date

20210913

Claims (19)

1. 1 . A clamping screw device, comprising: a clamping screw extending in an axial direction and including a screw head that is rotatable, a screw body, and a screw foot; and an electrical insulation on an outside of the screw head, the electrical insulation accommodates an electromagnetic shielding and a seal.
2. 2 . The clamping screw device of claim 1 , wherein the screw head is embedded in the electrical insulation and the electrical insulation has a circumferential surface on which the electromagnetic shielding and/or the seal are arranged radially outward.
3. 3 . The clamping screw device of claim 2 , wherein the electrical insulation is injection-molded on the outside of the screw head, on an inside of the screw head, or between the screw head and the electromagnetic shielding.
4. 4 . The clamping screw device of claim 1 , wherein: the electrical insulation has an end face on which the electromagnetic shielding is arranged, the seal is arranged in a circumferential direction radially outwards on a circumferential surface of the electromagnetic shielding, and/or the screw head and/or the electromagnetic shielding has an outer profile or an inner profile for a screwdriving tool.
5. 5 . The clamping screw device of claim 1 , wherein the electromagnetic shielding is a pot that completely covers the screw head.
6. 6 . The clamping screw device of claim 1 , wherein the seal is a ring seal or a sleeve seal having a sealing lip.
7. 7 . The clamping screw device of claim 1 , wherein: the screw head has a flange for mechanically clamping an electrical high-current contact device, the screw body has a smooth screw shank and a threaded shank axially adjoining the smooth screw shank, and/or the threaded shank or the screw foot has a touch guard protruding away from the threaded shank.
8. 8 . An electrical high-current connector, comprising: a clamping screw device including a clamping screw extending in an axial direction and having a screw head that is rotatable, a screw body, and a screw foot, and an electrical insulation on an outside of the screw head, the electrical insulation accommodates an electromagnetic shielding and a seal; and a contact device mechanically clamped against a mating contact device by the clamping screw device, the clamping screw device and the contact device electrically connect with the mating contact device.
9. 9 . The electrical high-current connector of claim 8 , wherein the contact device has a first contact section for a high-current line, a mechanical clamping section, and a second contact section with a contacting surface.
10. 10 . The electrical high-current connector of claim 8 , wherein an electromagnetic shielding of the electrical high-current connector is electrically contactable by the electromagnetic shielding of the clamping screw device.
11. 11 . The electrical high-current connector of claim 8 , further comprising a housing with a through recess receiving the clamping screw device.
12. 12 . The electrical high-current connector of claim 11 , wherein: the seal of the clamping screw device can seal with an inner side of the through recess and/or an outside of the clamping screw device, the housing has a pair of housing parts between which the contact device and an electromagnetic shielding of the electrical high-current connector are accommodated, and/or the through recess of the housing is covered by a protective cap formed as a protective cap slider mounted on the housing.
13. 13 . The electrical high-current connector of claim 8 , wherein an electromagnetic shielding of the electrical high-current connector is on an electrically insulating cladding of the contact device.
14. 14 . The electrical high-current connector of claim 13 , wherein the electrically insulating cladding has a pair of cladding parts that each include a shield part of the electromagnetic shielding of the electrical high-current connector, the shield parts are latched to one another and in electrically conductive contact with one another.
15. 15 . The electrical high-current connector of claim 8 , wherein the electrical high current connector: is designed for permanent electrical currents of at least approximately 100 A, is designed for electrical voltages of at least approximately 200V, and/or meets a vibration requirement of class LV 214.
16. 16 . An electrical high-current line connector, comprising: an electrical high-current connector, including: a clamping screw device including a clamping screw extending in an axial direction and having a screw head that is rotatable, a screw body, and a screw foot, and an electrical insulation on an outside of the screw head, the electrical insulation accommodates an electromagnetic shielding and a seal; and a contact device mechanically clamped against a mating contact device by the clamping screw device, the clamping screw device and the contact device electrically connect with the mating contact device.
17. 17 . The electrical high-current line connector of claim 16 , wherein: the contact device forms an electrical high-current line connection, an electromagnetic shielding of the electrical high-current connector shields a connecting region of a contact section of the contact device, and/or the electrical high-current connector is one of a pair of electrical high-current connectors of the electrical high-current line connector.
18. 18 . The electrical high-current line connector of claim 16 , wherein the contact device is connected to an electrical high-current line embedded in an electromagnetically shielded high-current line connection, an electromagnetic shielding of the electrical high-current connector is electrically connected with an electromagnetic shielding of the electrical high-current line, and/or an electrical outer insulation of the electrical high-current line is sealed with respect to a housing of the electrical high-current connector and fixed.
19. 19 . An electrical entity, comprising: a clamping screw device including a clamping screw extending in an axial direction and having a screw head that is rotatable, a screw body, and a screw foot, and an electrical insulation on an outside of the screw head, the electrical insulation accommodates an electromagnetic shielding and a seal.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims the benefit of the filing date under 35 U.S.C. § 119(a)-(d) of German Patent Application No. 102021123635.5, filed on Sep. 13, 2021. FIELD OF THE INVENTION The present invention relates to an electrical connector and, more particularly, to a mechanical high-current connection clamping screw device for an electrical high-current connector. BACKGROUND In the electrical sector (electrics, electrical engineering, electrical power engineering etc.) beyond ground-based electrical power engineering and its analogues, a large number of electrical line connectors are known which serve the purpose of transmitting electrical currents and voltages in the medium- or high-current or -voltage range. In this case, the line connectors, for example for a power supply and/or a distribution of electrical energy in warm, possibly hot, contaminated, humid and/or chemically aggressive environments, in the short term and/or permanently, ensure problem-free transmission of electrical energy. Owing to a wide range of applications, a large number of such line connectors are known in the non-automotive sector and in the automotive sector. Such high-current line connectors can be installed, for example, on/in an electrical entity, such as, for example, a rechargeable battery or a rechargeable battery module, or a (traction) battery or a battery module; an inverter; a switchgear assembly etc. High fuel costs and efforts to reduce environmental impact make, for example in the automotive sector, hybrid or electric vehicles necessary. One aspect of these vehicles is handling of high electrical charging and operating currents and/or voltages, wherein the components in question of the hybrid or electric vehicles need to designed correspondingly. This relates, for example, to high-current/high-voltage lines (for example stranded line, conductor bar, busbar, etc. consisting of copper or aluminum) and contact devices (for example terminal fitting, flat contact, busbar etc. consisting of aluminum or copper) of the line connectors. In order to make electrical contact between an electrical entity and a high-current line connector, power electromechanical screw contact connections can be used which also meet stringent requirements. A mechanical path can be functionally separated from an electrical path by such a high-current screw contact connection. The mechanical path serves to transmit the mechanical tensile stresses of a screw fitting, in particular a steel-steel screw fitting, and the electrical path is used as a low-resistance electrical contact connection, in particular a copper-copper connection, of the high-current screw contact connection. As a result, a robust and, in the typical manufacturing environment, easily handleable electrical high-current screw contact connection is provided. In addition, such a high-current screw contact connection is easily separable (diagnosis, recycling) and at the same time shockproof. Such high-current screw contact connections can be used in a variety of ways and flexibly for making contact with battery modules and for other connection points in various termination panels of an electrical power architecture. Efforts are continually being made to improve electrical high-current line connectors, in particular to design them to be more effective and to in the process make them cost-effective. It is therefore an object of the invention to specify an improved high-current screw contact connection. SUMMARY A clamping screw device has a clamping screw extending in an axial direction and including a screw head that is rotatable, a screw body, and a screw foot. The clamping screw device has an electrical insulation on an outside of the screw head. The electrical insulation accommodates an electromagnetic shielding and/or a seal. BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described by way of example with reference to the accompanying Figures, of which: FIG. 1 is a sectional perspective view of an electrical high-current connector according to an embodiment of an electrical high-current line connection plugged together with an electrical high-current mating connector; FIG. 2 is a detail sectional perspective view of an electrical clamping screw device in an electrical high-current connector according to an embodiment; FIG. 3 is a sectional side view of the electrical clamping screw device of FIG. 2; FIG. 4 is a detail sectional perspective view of an electrical clamping screw device according to another embodiment in an electrical high-current connector; and FIG. 5 is a sectional side view of the electrical clamping screw device of FIG. 4. DETAILED DESCRIPTION OF THE EMBODIMENT(S) The invention is explained in greater detail below on the basis of exemplary embodiments with reference to the appended schematic drawings which are not to scale. Sections, elements, component parts, units, components and/or patterns which have an identical, un