Power connection with CNB fibers or CNT fibers, and systems with such a power connection

Abstract

System (1) with at least two components (2, 3) which are electrical and / or electronic components (2, 3), wherein the at least two components (2, 3) are electrically connected by means of a current connection (10), wherein the current connection (10) is configured to electrically connect the electrical and / or electronic components (2, 3) to each other, characterized in that the current connection (10) comprises CNB fibers and / or CNT fibers, wherein the current connection (10) consists of CNB fibers and / or CNT fibers which are bundled together in one or more bundles.

Description

State of the art

[0001] The invention relates to an electrical connection according to claim 1 and a system with such an electrical connection according to claim 3.

[0002] Currently, high currents within and between electrical or electronic components are conducted using metallic busbars. This busbar connection can be made between electrical and / or electronic components, such as those that are part of a power electronic component (e.g., an inverter, a DC-DC converter, or an electric motor), or between components that are themselves power electronic components. Busbars are typically made of copper. These have the disadvantage of being rigid and relatively heavy. Due to the rigidity of a copper busbar, additional mechanical decoupling devices are necessary between two components connected via a busbar. This mechanical decoupling is achieved, for example, by additional bends. These bends, in turn, can cause undesirable parasitic inductances.Furthermore, mechanical relief devices can also generate additional losses and thus more heat in the component, thereby reducing the efficiency of the component.

[0003] Documents DE 10 2006 031 322 A1, DE 10 2010 035 696 A1, DE 42 17 253 C2, DE 20 2011 002 349 U1 and DE 10 2016 224 859 A1 disclose devices for electrically conductive connections. Advantage of the invention / Disclosure of the invention

[0004] Accordingly, the object of the present invention is to provide a power connection and a system with such a power connection of the type mentioned above which is mechanically more flexible, so that the aforementioned disadvantages are eliminated or minimized. This problem is solved with the invention according to the invention.

[0005] The system is solved by at least two components, which are electrical and / or electronic components. These at least two components are electrically connected by means of a power connection. The power connection is designed to electrically connect the electrical and / or electronic components to each other. The power connection comprises CNB fibers and / or CNT fibers, and consists of CNB fibers and / or CNT fibers bundled together in one or more bundles.

[0006] CNB fibers are fibers based on carbon nanomaterials, such as graphene. CNT fibers are fibers based on carbon nanotubes. Both CNB and CNT materials have the advantage of being highly flexible and therefore very slender. Their use in electrical connections results in flexible and slender connections. This enables the development of electrical connection systems that are mechanically more flexible than previously known systems and that do not require additional mechanical stress-relieving elements.

[0007] Another advantage is that CNB and CNT fibers have an electrical conductivity of 10 S / µm to a maximum of 50 S / µm and therefore possess very good current-conducting properties. In particular, the electrical connection is a high-current connection, meaning it is designed for currents of at least 40 amperes.

[0008] By using a flexible and resilient electrical connection according to the invention in a system for connecting components, additional mechanical stress relief in the system can be dispensed with. The integration of the electrical connection according to the invention into the system results in the components being movable relative to each other and a greater degree of freedom in the arrangement of the components relative to each other or within a given installation space.

[0009] By eliminating a mechanical decoupling device from the system, power loss is reduced, and less heat is generated within the system that would otherwise require cooling. Furthermore, reducing the number of components saves weight and material. This simplifies the system's design and manufacturing process, thus lowering production costs.

[0010] In an advantageous embodiment of the invention, the CNB fibers and / or the CNT fibers are sewn or knotted to at least one of the components to establish the electrical connection, or are connected by means of a crimped tab or a tab formed from the fibers. This provides a simple and reliable electrical connection between the electrical connection and the component. Furthermore, soldering is unnecessary.

[0011] In a further embodiment of the invention, the electrical connection with at least one of the components has a detachable contact. Detachable contacts have the advantage that the electrical connection or the component can be more easily exchanged and replaced or reused in another system.

[0012] For example, detachable connections can be achieved using a snap fastener or a hook-and-loop fastener. In a further development, it is envisaged that, for detachable electrical contact with at least one of the components, the CNB fibers and / or the CNT fibers have a snap fastener, and the contact point of the component has a corresponding counterpart to the snap fastener. One end of the CNT fibers and / or CNB fibers is joined and crimped or riveted into the snap fastener. The counterpart to the snap fastener for the detachable electrical contact is attached to the component. For example, the counterpart is soldered or riveted to the component.

[0013] Another implementation of the detachable contact between the electrical connection and a component uses a hook-and-loop fastener. The electrical connection is detachably contacted with at least one of the components by means of a hook-and-loop fastener, whereby in particular the CNB fibers or the CNT fibers form loops at their ends and the component has corresponding conductive barbs at its contact point.

[0014] In an alternative implementation of the system according to the invention, the hook-and-loop fastener can also be used to mechanically fasten the electrical connection. For this purpose, the electrical connection again has loops made of CNB fibers or CNT fibers.

[0015] Non-conductive barbs are arranged on a component or carrier, which allow the loops of the electrical connection to form a hook-and-loop connection. This mechanically guides and secures the electrical connection.

[0016] In an advantageous embodiment of the system according to the invention, the system is an electrical commutation circuit comprising at least two current connections with CNB fibers or CNT fibers, wherein two of the current connections are arranged crossing or overlapping within the commutation circuit. This advantageously results in a further reduction of parasitic inductances.

[0017] The components themselves can be power electrical components, such as an inverter, a DC / DC converter, power electronics, or an electric motor. The components can also be parts of a power electrical component. drawing Fig. Figure 1 shows a first example of a system according to the invention with a power connection Fig. Figure 2 shows a second example of a system according to the invention as a commutation circuit. Fig. Figure 3 shows examples of possible contacting in the system according to the invention. Description of the exemplary embodiment

[0018] Fig. Figure 1 shows a first example of a system 1 according to the invention. The system 1 comprises a first component 2 and a second component 3. Each component 2, 3 can optionally have a connection 4 with which the component 2, 3 can be connected to other components or parts of the system 1 not shown here. The first component 2 and the second component 3 are electrically connected to each other via a current connection 10. According to the invention, the current connection 10 comprises CNT fibers and / or CNB fibers. In particular, the current connection 10 is formed by CNT fibers and / or CNB fibers. In addition to the current-carrying CNT fibers and / or CNB fibers, the current connection 10 can, for example, also have insulation from the environment. Or the CNT fibers and / or CNB fibers are grouped into several bundles, the bundles being electrically insulated from each other.

[0019] The electrical connection 10 can be made to the component 2, 3, for example, by sewing or knotting the electrical connection 10 to the component 2, 3. In this process, one or more CNB fibers and / or CNT fibers of the electrical connection 10 are inserted into the component 2, 3 in such a way that a seam or knot is formed. The connection can also be made using a tab that is crimped to one end of the fibers of the electrical connection 10. The tab itself is then connected to the component 10. The tab could also be formed from the CNB or CNT fibers themselves.

[0020] Fig. 1a) and Fig. 1b) differ only in the relative spatial arrangement of the first and second building elements 2, 3 to each other. In Fig. 1a) The two components 2 and 3 are arranged at an angle of approximately 90° to each other. In Fig. 1b) The two components 2 and 3 are arranged along a line. This illustrates that the electrical connection 10 with CNB fibers and / or CNT fibers creates a very flexible connection between the components 2 and 3, allowing for different arrangements of the components 2 and 3 relative to each other. A further advantage arises from the flexibility of the electrical connection 10 for the assembly of components, since in an assembly process the components already connected via the flexible electrical connection can, for example, be folded together and thus guided through a small opening, and then unfolded and positioned again.

[0021] In Fig. Figure 2 shows a commutation circuit. The commutation circuit shown here could, for example, be used in an inverter. The power connection 10 with CNB fibers and / or CNT fibers is present and lies between the positive and negative outputs of the DC link capacitor 20 and the positive input 22 and negative input 21 of a power module (not shown) of a B6 bridge. In an alternative embodiment, the power connections 10 can also be routed one above the other, achieving the same effect as when crossed.

[0022] In Fig. Figure 3a shows an example of a detachable connection between an electrical connection 10 and a component 2. The detachable connection is a hook-and-loop fastener. The electrical connection 10 has loops 6 at one end, the loops 6 being formed from the CNB fibers or the CNT fibers of the electrical connection 10. Barbs 7 are arranged on the surface of the component 2. The barbs 7 are electrically conductive and can engage in the loops 6 of the electrical connection 10, thereby creating the electrical contact between the electrical connection 10 and the component 2. In an alternative embodiment, the barbs 7 can also be made of a non-conductive material. In this case, the hook-and-loop fastener serves for the mechanical guidance or fastening of the electrical connection 10.

[0023] In Fig.Figure 3a shows an example of a current connection 10 made of CNB fibers and / or CNT fibers. At the end of the current connection, the fibers form a tab 15. The ends of the fibers are spliced ​​to the fiber strand (16).

Claims

[1] System (1) comprising at least two components (2, 3) which are electrical and / or electronic components (2, 3), wherein the at least two components (2, 3) are electrically connected by means of a current connection (10), wherein the current connection (10) is configured to electrically connect the electrical and / or electronic components (2, 3) to each other, characterized by , that the power connection (10) comprises CNB fibers and / or CNT fibers, wherein the power connection (10) consists of CNB fibers and / or CNT fibers bundled together in one or more bundles. [2] System (1) according to claim 1, characterized by , that to contact the electrical connection (10) with at least one of the components (2, 3) the CNB fibers or the CNT fibers are sewn or knotted to the component (2, 3) or connected by means of a crimped tab or a tab formed by the fiber (15). [3] System (1) according to claim 1, characterized by , that the electrical connection (10) with at least one of the components (2, 3) has a detachable contact. [4] System (1) according to claim 3, characterized by , that for the detachable contacting of the electrical connection (10) with at least one of the components (2, 3) the CNB fibers or the CNT fibers have a push button and the contact point of the component (2, 3) has a counterpart corresponding to the push button. [5] System (1) according to claim 3, characterized by , that the electrical connection (10) is detachably contacted with at least one of the components (2,3) by means of a hook and loop connection, wherein in particular the CNB fibers or the CNT fibers form loops (6) at their ends and the component (2) has corresponding conductive barbs (7) at its contact point. [6] System (1) according to claim 3, characterized by, that the electrical connection (10) is detachably contacted with at least one of the components (2,3) by means of a hook and loop connection, wherein in particular the CNB fibers or the CNT fibers form loops (6) at their ends and the component (2) has corresponding non-conductive barbs (7) at its contact point. [7] System (1) according to any of the preceding claims, characterized by , that the system (1) is an electrical commutation circuit having at least two power connections (10) with CNB fibers or CNT fibers, wherein two of the power connections (10) are arranged crossing or overlapping in the commutation circuit. [8] System (1) according to any of the preceding claims, characterized by , that the components (2, 3) are power electrical components or that the components (2, 3) are parts of a power electrical component.

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