POWER CONNECTION DEVICE FOR PRINTED CIRCUIT BOARDS AND METHOD FOR MOUNTING SUCH A POWER CONNECTION DEVICE ON A PRINTED CIRCUIT BOARD

Description

[0001] The invention relates to a power connection device for a printed circuit board and a method for mounting such a power connection device on a printed circuit board.

[0002] A printed circuit board (PCB) serves as a carrier for electronic components. A printed circuit board can be equipped with electronic components, especially power electronic components.

[0003] Printed circuit boards typically consist of an electrically insulating material with electrically conductive traces. Fiber-reinforced plastic or laminated paper is typically used as the insulating material for a printed circuit board. The electrically conductive traces are often made from a thin layer of copper, which is etched according to the layout of the electronic circuit. The electrically conductive traces can be located on one or both sides of the printed circuit board. Multilayer printed circuit boards are also known, in which the traces are also integrated within the electrically insulating material of the printed circuit board.

[0004] For high currents in the field of power electronics, electronic components can be connected via high-current connectors. However, the assembly and installation of such electrically conductive high-current connectors presents a challenge, as high mechanical forces can occur during assembly of the high-current connectors to the electrical circuit board, which can lead to damage to the circuit board. Since circuit boards are typically made of a relatively brittle material, even low assembly forces can cause partial damage to the circuit board. Furthermore, high-current connectors are often soldered to electrical contacts on the conductor tracks. This can lead to faulty solder connections. In addition, if high temperatures occur at the contact point, the solder there can partially melt, resulting in the solder connection being interrupted.

[0005] Document EP 3 435 490 A1 discloses a power connection device for a printed circuit board according to the preamble of claim 1.

[0006] It is therefore an object of the present invention to provide a power connection device for a printed circuit board which can be easily mounted on the printed circuit board without damaging the printed circuit board and which always provides a reliable electrical connection even when temperature fluctuations occur.

[0007] This object is achieved according to the invention by a power connection device for a printed circuit board having the features specified in patent claim 1 and by a method for mounting such a power connection device on a printed circuit board having the features specified in patent claim 14.

[0008] The invention accordingly provides a power connection device for a printed circuit board with a first connecting element which has an outer contact surface which can be inserted into a corresponding contact opening of the printed circuit board and an inner sliding surface, and with a second connecting element which has a mandrel-shaped section with an outer sliding surface which presses the inner sliding surface of the first connecting element inserted into the contact opening of the printed circuit board outwards to establish an electrical contact between the contact surface of the first connecting element and the contact opening of the printed circuit board as soon as the outer sliding surface of the mandrel-shaped section of the second connecting element is pressed against the inner sliding surface of the first.

[0009] The pressing is achieved because, in an uninstalled state of the power connection device, an external dimension, in particular an external diameter, of the mandrel or the mandrel-shaped section of the second connecting element is larger than an internal dimension, in particular an internal diameter, of the first connecting element, which can in particular be designed as a ring.

[0010] Even if the second connecting element is pressed into the first connecting element with high mechanical forces, the sliding surfaces result in only very slight mechanical stresses within the circuit board, thus minimizing the risk of damage to the circuit board. An advantage of the power connection device according to the invention is that it can be mounted on the circuit board quickly and easily. This accelerates the assembly process when assembling the circuit board. The assembly time required for assembling a circuit board can thus be significantly reduced.

[0011] Since no damage to the circuit board occurs during the assembly of the power connection device, the proportion of damaged circuit boards or rejects after the assembly process is also lower.

[0012] Another advantage is that no solder or similar material is required to create an electrical connection. Furthermore, the electrical connection remains intact even at high temperatures, since there is no solder to melt.

[0013] In the current connection device according to the invention, a predetermined breaking connection is arranged between the mandrel-shaped section of the second connecting element and the first connecting element, which breaks open as soon as the mandrel-shaped section of the second connecting element is pressed into the first connecting element.

[0014] In another possible embodiment of the power connection device according to the invention, the two connecting elements of the power connection device comprise an electrically conductive material, in particular a metal alloy. In another possible embodiment of the power connection device according to the invention, the mandrel-shaped portion of the second connecting element is designed to be deformable.

[0015] In one possible embodiment of the current connection device according to the invention, the mandrel-shaped section of the second connecting element is elasto-plastically deformable.

[0016] In a further possible embodiment of the power connection device according to the invention, the second connecting element has a connection section.

[0017] In one possible embodiment of the current connection device according to the invention, the connection section of the second connecting element is essentially rigid.

[0018] In contrast to the mandrel-shaped section of the second connecting element, the connecting section or the connecting element is thus essentially rigid in one possible embodiment.

[0019] In a further possible embodiment of the current connection device according to the invention, the first connecting element is designed to be deformable.

[0020] In one possible embodiment of the current connection device according to the invention, the first connecting element is designed to be elasto-plastically deformable.

[0021] In a further possible embodiment of the current connection device according to the invention, the first connecting element is formed by a ring which can be inserted into the contact opening of the printed circuit board and which has an outer cylindrical contact surface and an inwardly curved sliding surface.

[0022] In a further possible embodiment of the current connection device according to the invention, the mandrel-shaped section of the second connecting element has an outwardly curved sliding surface.

[0023] In a further possible embodiment of the current connection device according to the invention, the first connecting element of the current connection device inserted into the contact opening of the printed circuit board is predominantly elastically expanded to establish the electrical contact between the contact surface of the first connecting element and the contact opening of the printed circuit board as soon as the outer sliding surface of the mandrel-shaped section of the second connecting element is pressed into the inner sliding surface of the first connecting element.

[0024] In a further possible embodiment of the current connection device according to the invention, the predominantly elastically expanded first connecting element is arranged in the contact opening of the printed circuit board in a rotationally secure manner by means of force and / or form locking with regard to further assembly steps.

[0025] In a further possible embodiment of the power connection device according to the invention, the second connecting element of the power connection device has, as a connecting section or connecting element, a cylindrical inner bore for inserting or screwing in an electrical plug.

[0026] In a further possible embodiment of the power connection device according to the invention, the printed circuit board has a layer with electrical conductor tracks that are electrically connected to the contact opening of the printed circuit board.

[0027] In a further possible embodiment of the power connection device according to the invention, the second connecting element of the power connection device can be pulled out or pressed out of the first connecting element of the power connection device in order to interrupt the electrical contact between the contact surface of the first connecting element and the contact opening of the printed circuit board.

[0028] The invention further provides a printed circuit board having the features specified in claim 13.

[0029] The invention accordingly provides a printed circuit board with at least one contact opening into which a power connection device according to the first aspect of the invention is pressed in to produce an electrical contact.

[0030] The invention further provides an assembly method having the features specified in claim 13.

[0031] The invention accordingly provides a method for mounting a power connection device according to the first aspect of the invention on a printed circuit board, comprising the steps of: inserting the first connecting element of the power connection device into a contact opening of a printed circuit board, wherein the first connecting element of the power connection device is supported by an assembly aid element, and pressing the second connecting element of the power connection device against the first connecting element of the power connection device, so that the two connecting elements of the power connection device are displaced relative to one another and the outer contact surface of the first connecting element is pressed against the contact surface of the contact opening of the printed circuit board to establish an electrical contact, wherein a predetermined breaking connection is arranged between the mandrel-shaped section of the second connecting element and the first connecting element, which breaks open,as soon as the mandrel-shaped portion of the second connecting element is pressed into the first connecting element.

[0032] In a preferred embodiment of the assembly method according to the invention, the printed circuit board is aligned substantially horizontally during assembly of the power connection device.

[0033] The first connecting element of the power connection device is preferably inserted from above into a contact opening of the substantially horizontally aligned printed circuit board, wherein the first connecting element of the power connection device is supported from below by an auxiliary assembly element.

[0034] Furthermore, the second connecting element of the power connection device is preferably subsequently pressed from above against the first connecting element of the power connection device, so that the two connecting elements of the power connection device are displaced relative to one another and the outer contact surface of the first connecting element is pressed against the contact opening of the printed circuit board to establish an electrical contact.

[0035] In the following, possible embodiments of the current connection device according to the invention and of the method according to the invention are described in detail with reference to the attached figures.

[0036] They show: Figures 1A, 1B, 1C, 1D show a view of an assembly process for mounting a high-current connection according to the invention on a printed circuit board; Figures 2A, 2B, 2C, 2D show sectional views for explaining the Figures 1A to 1Dillustrated assembly process; Figures 3A, 3B zoomed detailed views to explain the assembly process according to the invention for mounting a high-current connection according to the invention on a printed circuit board; Fig. 4 a simple flow diagram to illustrate a possible embodiment of an assembly method according to the invention for mounting a power connection device on a printed circuit board.

[0037] The perspective views according to Figures 1A to 1D as well as the sectional views according to Figures 2A to 2D show an assembly of a power connection device 1 according to the invention on a printed circuit board 2. In the Figures 1A to 1D and the sectional views according to Figures 2A to 2DIn the assembly process shown, the printed circuit board 2 is oriented substantially horizontally. Alternatively, the printed circuit board 2 can also be oriented in a different direction during assembly, for example vertically. In the example shown, the printed circuit board 2 has a contact opening 3, into which the current connection device 1 according to the invention is first inserted as a component and then pressed against the contact opening. For this purpose, a mounting press element 4 and an assembly aid element 5 can be used in one possible embodiment. The current connection device 1 consists of the Figures 1 , 2illustrated embodiment of an integral component, which consists of a first connecting element 1A and a second connecting element 1B. The power connection device 1 has a first connecting element 1A, which can be inserted into the corresponding contact opening 3 of the printed circuit board 2. The power connection device 1 further has a second connecting element 1B, which has a mandrel-shaped section 6. In the Figures 1 , 2 In the example shown, the first connecting element 1A is provided below the second connecting element 1B and can be inserted into the contact opening 3 of the printed circuit board 2. In the Figures 1 , 2In the example shown, the first connecting element 1A and the second connecting element 1B together form an integral component, namely the current connection device 1 according to the invention. In this embodiment, there is a predetermined breaking connection between the mandrel-shaped section 6 of the upper second connecting element 1B and the lower first connecting element 1A insertable into the contact opening 3, which only breaks during the assembly process. In an alternative embodiment, the first connecting element 1A and the second connecting element 1B can also be connected to one another via a detachable connection. For example, a ring can be pressed onto the mandrel-shaped section 6 of the second connecting element 1B.

[0038] The Figures 3A, 3B show detailed sectional views to illustrate the assembly process. Fig. 3A the detail marked with "X" Fig. 1B and shows Fig. 3Bthe detail marked "Y" from Fig. 1C , each in a zoomed view. You can see in the Figures 3A, 3BAbove, the second connecting element 1B, which has a mandrel-shaped section 6. The first connecting element 1A inserted into the contact opening 3 of the circuit board 2 has an inner sliding surface 7. The second connecting element 1B has a mandrel-shaped section 6 with an outer sliding surface 8. The outer sliding surface 8 of the mandrel-shaped section 6 of the second connecting element 1B presses the inner sliding surface 7 of the first connecting element 1A inserted into the contact opening 3 of the circuit board 2 outwards to establish an electrical contact between the contact surface 11 of the first connecting element 1A and a contact surface 9 of the contact opening 3 of the circuit board 2, as soon as the outer sliding surface 8 of the mandrel-shaped section 6 of the second connecting element 1B is mechanically pressed against the inner sliding surface 7 of the first connecting element 1A. In the Figures 3A, 3BIn the embodiment shown, the circuit board 2 is a multi-layer circuit board which, in addition to the electrically conductive conductor tracks 10-1, 10-5 on the top and / or bottom, also has conductor tracks 10-2, 10-3, 10-4 within the insulating material. At the contact opening 3, the circuit board 2 has an electrically conductive contact surface 9 which is electrically connected to conductor tracks 10-1, 10-2, 10-3, 10-4, 10-5. In the embodiment shown in the Figures 3A, 3BIn the multilayer printed circuit board 2 shown, two or more layers of conductor tracks 10 are thus electrically connected in parallel in order to achieve the necessary conductor cross-section even for high current amplitudes. This allows electrical currents with higher current amplitudes of more than 10 amperes to be conducted. The electrically conductive conductor tracks 10 or conductor layers can be made of copper, for example. By connecting the electrical conductor tracks 10 in parallel, the individual cross-section of the various conductor tracks 10 can also be reduced for a given current strength. The size of the printed circuit board 2 can thus be reduced and adapted to given requirements of the electrical circuit, such as larger voltage gaps. The number of conductor tracks 10 can vary depending on the application.The two connecting elements 1A, 1B of the power connection device 1 preferably comprise an electrically conductive material, in particular a metal alloy. This allows the electrical current to flow via the two connecting elements 1A, 1B of the power connection device 1 and via the electrically conductive contact surface 9 to the conductor tracks 10 of the circuit board 2. As can be seen in . Fig. 3AAs can be seen, the first connecting element 1A inserted into the contact opening 3 of the printed circuit board 2 has an outer contact surface 11, which is mechanically pressed against the contact surface 9 of the printed circuit board 2 after the assembly process has been completed. The outer sliding surface 8 of the mandrel-shaped section 6 of the second connecting element 1B presses the inner sliding surface 7 of the first connecting element 1A inserted into the contact opening 3 of the printed circuit board 2 outwards, so that the outer contact surface 11 of the first connecting element 1A is pressed outwards to establish an electrical contact between the contact surface 11 and the contact surface 9 of the printed circuit board 2. This is shown in Fig. 3B, in which the inserted mandrel-shaped section 6 of the second connecting element 1B mechanically presses the electrically conductive contact surface 11 of the first connecting element 1A against the contact surface 9 of the contact opening 3 of the printed circuit board 2. Due to the mechanical force, the electrical contact resistance between the contact surface 9 of the printed circuit board 2 and the contact surface 11 of the first connecting element 1A is low.

[0039] In one possible embodiment, the first connecting element 1A and the second connecting element 1B of the power connection device 1 are initially connected via a predetermined breaking connection 12. This predetermined breaking point or predetermined breaking connection 12 breaks open during the assembly process as soon as the mandrel-shaped section 6 of the second connecting element 1B is pressed into the first connecting element 1A, as also in Fig. 3BAlternatively, the first connecting element 1A can also be connected to the second connecting element 1B via a detachable connection. Fig. 3A shows the state of the power connection device 1 after inserting the first connecting element 1A into the contact opening 3 of the printed circuit board 2, before the second connecting element 1B is pressed downwards by means of a pressing element or assembly pressing element 4. Fig. 3B shows the state after pressing the second connecting element 1B into the first connecting element 1A. The mandrel-shaped section 6 of the second connecting element 1B is preferably deformable. For example, the mandrel-shaped section 6 of the second connecting element 1B can be designed to be elasto-plastically deformable. During the pressing process, an initial elastic deformation often occurs, which subsequently transitions into a plastic deformation.

[0040] The first connecting element 1A is preferably also deformable. For example, the first connecting element 1A is designed to be elasto-plastically deformable.

[0041] In the Figures 1 , 2In the embodiment shown, the contact opening 3 of the circuit board 2 is circular. In alternative embodiments, the contact opening 3 of the circuit board 2 can also have a different cross-section, for example square, triangular, elliptical or rectangular. In these embodiments, the first connecting element 1A is shaped or formed accordingly, e.g. triangular, square, rectangular or elliptical. The first connecting element 1A of the power connection device 1 inserted into the contact opening 3 of the circuit board 2 is preferably predominantly elastically expanded to establish electrical contact between the contact surface 11 of the first connecting element 1A and the contact surface 9 of the contact opening 3 of the circuit board 2 as soon as the outer sliding surface 8 of the mandrel-shaped section 6 of the second connecting element 1B is pressed against the inner sliding surface 7 of the first connecting element 1A.The preferably predominantly elastically expanded first connecting element 1A is arranged in the contact opening 3 of the printed circuit board 2 in a manner that prevents rotation with respect to further assembly steps by means of force and / or form locking.

[0042] In a preferred embodiment, the second connecting element 1B of the power connection device 1 has a connection section 13. In one possible embodiment, this connection section 13 has a cylindrical inner bore. In one possible embodiment, this cylindrical inner bore serves for inserting or screwing in an electrical plug for conducting an electrical current, in particular an electrical current with more than 10 amperes.

[0043] The Figures 1 , 2show the assembly of the current connection device 1 according to the invention on a printed circuit board 2. First, the current connection device 1 is inserted into the contact opening 3 of the printed circuit board 2, as shown in the Figures 1B , 2B The printed circuit board 2 is preferably aligned horizontally. The inserted power connection device 1 is supported from below by an assembly aid 5, as shown, inter alia, in the Figures 1B , 2Bshown. Subsequently, a pressing element or assembly pressing element 4 is guided downwards from above and presses the second connecting element 1B of the power connection device 1 against the lower first connecting element 1A of the power connection device 1, so that the two connecting elements 1A, 1B of the power connection device 1 are spatially displaced vertically relative to one another and the outer contact surface 11 of the first connecting element 1A is pressed against the contact surface 9 of the contact opening 3 of the printed circuit board 2 to establish an electrical contact. Figures 1C , 2C show the pressing of the second connecting element 1B against the underlying connecting element 1A, which is supported by the assembly aid element 5. The Figures 1D , 2D show the power connection device 1 mounted in the circuit board 2 with the upwardly directed cylindrical inner bore 13 for inserting or screwing in an electrical plug.

[0044] Fig. 4 shows a simple flow chart illustrating the method according to the invention for assembling a power connection device 1 of a printed circuit board 2.

[0045] In a first assembly step S1, the first connecting element 1A of the power connection device 1 is inserted into a contact opening 3 of a printed circuit board 2, wherein the first connecting element 1A of the power connection device 1 is preferably supported by an assembly aid element 5. Preferably, the first connecting element 1A of the power connection device 1 is inserted from above into a contact opening 3 of a substantially horizontally aligned printed circuit board 2, as shown in the Figures 1 , 2 The first connecting element 1A of the power connection device 1 is supported from below by the assembly aid element 5.

[0046] Subsequently, in a second assembly step S2, the second connecting element 1B of the power connection device 1 is pressed against the first connecting element 1A of the power connection device 1, so that the two connecting elements 1A, 1B of the power connection device 1 are spatially displaced relative to one another in the vertical direction, i.e. perpendicular to the orientation of the circuit board 2, and the outer contact surface 11 of the first connecting element 1A is pressed against the contact surface 9 of the contact opening 3 of the circuit board 2 to establish an electrical contact. Preferably, the second connecting element 1B is pressed from above into the first connecting element 1A of the power connection device 1, as shown in the Figures 1 , 2 shown.

[0047] In one possible embodiment, the mounting aid 5 is located on an assembly table of an assembly device. In one possible embodiment, the printed circuit board 2 has a plurality of corresponding contact openings 3, with a corresponding mounting aid 5 being provided for each contact opening 3 and mountable on the assembly table. The shape and number of the contact openings 3 can vary depending on the application.

[0048] In one possible embodiment, the mounted power connection device 1 can also be removed again from the contact opening 3 of the printed circuit board 2. In one possible embodiment, the second connecting element 1B of the power connection device 1 can be pulled out or pressed out of the first connecting element 1A of the power connection device 1 to interrupt the electrical contact between the contact surface of the first connecting element 1A and the contact surface of the contact opening 3 of the printed circuit board 2.

[0049] In one possible embodiment, the power connection device 1 can have one or more connection sections 13. Preferably, a connection section 13 in the form of a cylindrical inner bore is provided on the second connection element 1B. In one possible embodiment, a connection section 13 is also provided on the further first connection element 1A, for example, a cylindrical inner bore for inserting or screwing in an electrical plug. In another possible embodiment, a corresponding connection section 13 is provided on both the second connection element 1B and the first connection element 1A. For example, the connection section 13 can have an M5 thread.

[0050] In one possible embodiment of the power connection device 1 according to the invention, both the first connecting element 1A and the second connecting element 1B are rotationally symmetrical, meaning in this context that they are designed as rotational bodies. In this embodiment, the power connection device 1 can be manufactured, for example, in a turning process.

[0051] In an alternative embodiment, the first and / or second connecting element 1A, 1B can also be elliptical or square, whereby in this embodiment, the power connection device 1 can be manufactured, for example, in a milling process. For example, a simple, positive-locking, anti-rotation connection can be achieved by a square cross-section of the first connecting element 1A inserted into a corresponding square contact opening. The expanded first connecting element 1A is arranged in the contact opening 3 of the printed circuit board 2 in a non-rotational manner with respect to further assembly steps by means of a force-locking and / or positive locking.

[0052] The sliding surfaces are preferably shaped such that no excessive tension forces arise in the printed circuit board 2 during the assembly process. In one possible embodiment, the first connecting element 1A of the power connection device 1 is formed by a ring which can be inserted into the contact opening 3 of the printed circuit board 2 and which has an outer cylindrical contact surface and an inwardly curved sliding surface. In one possible embodiment, the ring or the first connecting element 1A can also have slots to facilitate insertion and / or to increase the desired pressure between the first connecting element 1A and the contact opening 3 of the printed circuit board 2. The mandrel-shaped section 6 of the second connecting element 1B preferably has an outwardly curved sliding surface 8, as shown in the Figures 3A, 3Bshown. The mandrel-shaped section 6 and the annular first connecting element 1A preferably have sliding zones or sliding surfaces 7, 8, which are designed to be joined to one another. In one possible embodiment, the sliding surfaces 7, 8 or sliding zones are essentially conical. The size or dimensioning of the two connecting elements 1A, 1B of the current connection device 1 can vary depending on the application, in particular depending on the required current density. For example, the current connection device 1 has rotationally symmetrical connecting elements which have an outer diameter of approximately 10 to 20 mm. The size of the contact surfaces depends on the current strength or current density of the electrical current to be transmitted.In one possible embodiment, the power connection device 1 is designed to transmit an electrical current of more than 10 amperes, for example an electrical current of approximately 600 amperes. The power connection device 1 according to the invention is suitable both for transmitting a direct current (DC) and for transmitting an alternating current (AC). The power connection device 1 according to the invention can be provided in particular for printed circuit boards 2 which are equipped with power electronics components. Further embodiments are possible. For example, a cooling element can also be provided on the power connection device 1. In order to increase the security against twisting of the assembled power connection device 1, knurling can additionally be provided on the outer surface of the first connecting element 1A. In one possible embodiment, the second connecting element 1B can also have several connection sections orConnection elements 13 for screwing in or inserting electrical plugs. The same applies to the lower first connecting element 1A of the power connection device 1.

Claims

1. A power connection device (1) for a printed circuit board (2) with - a first connecting element (1A), which has an outer contact surface (11), which can be inserted into a corresponding contact opening (3) of the printed circuit board (2), and an inner sliding surface (7), and with - a second connecting element (1B) having a thorn-shaped section (6) with an outer sliding surface (8), which presses the inner sliding surface (7) of the first connecting element (1A) inserted into the contact opening (3) of the printed circuit board (2) outwardly to establish an electrical contact between the contact surface (11) of the first connecting element (1A) and a contact surface (9) of the contact opening (3) of the printed circuit board (2), as soon as the outer sliding surface (8) of the thorn-shaped section (6) of the second connecting element (1B) is pressed against the inner sliding surface (7) of the first connecting element (1A), characterized in that a predetermined breaking connection (12) is arranged between the thorn-shaped section (6) of the second connecting element (1B) and the first connecting element (1A), which breaks open as soon as the thorn-shaped section (6) of the second connecting element (1B) is pressed into the first connecting element (1A).

2. The power connection device according to claim 1, wherein the two connecting elements (1A, 1B) of the power connection device (1) comprise an electrically conductive material, in particular a metal alloy, and / or wherein the thorn-shaped section (6) of the second connecting element (1B) is designed to be deformable, in particular elasto-plastically deformable.

3. The power connection device according to any of the preceding claims 1 or 2, wherein the first connecting element (1A) and / or the second connecting element (1B) has a connection section (13).

4. The power connection device according to claim 3, wherein the connection section (13) is essentially rigid.

5. The power connection device according to any one of the preceding claims 1 to 4, wherein the first connecting element (1A) is designed to be deformable, in particular elasto-plastically deformable, and / or wherein the first connecting element (1A) is formed by a ring which can be inserted into the contact opening (3) of the printed circuit board (2) and which has an outer cylindrical contact surface (11) and an inwardly curved sliding surface (7).

6. The power connection device according to claim 5, wherein the ring is slotted.

7. The power connection device according to any one of the preceding claims, wherein the thorn-shaped section (6) of the second connecting element (1B) has an outwardly curved sliding surface (8).

8. The power connection device according to any one of the preceding claims, wherein the first connecting element (1A) of the power connecting device (1) inserted into the contact opening (3) of the printed circuit board (2) is predominantly elastically expanded to establish the electrical contact between the contact surface (11) of the first connecting element (1A) and the contact surface (9) of the contact opening (3) of the printed circuit board (2), as soon as the outer sliding surface (8) of the thorn-shaped section (6) of the second connecting element (1B) is pressed against the inner sliding surface (7) of the first connecting element (1A).

9. The power connection device according to claim 8, wherein the expanded first connecting element (1A) is arranged in the contact opening (3) of the printed circuit board (2) in such a way that it is torsion-free with respect to further assembly steps by means of force fitting and / or form fitting.

10. The power connection device according to claim 9, wherein the form fitting is achieved by the thorn-shaped section (6) of the second connecting element (1B) and the first connecting element (1A) having a shape that differs from a body of revolution.

11. The power connection device according to any one of the preceding claims 3 to 10, wherein the second connecting element (1B) of the power connection device (1) has as a connection section (13) a cylindrical inner bore for inserting or screwing in an electrical plug, and / or wherein the printed circuit board (2) has at least one layer with electrical conductor tracks (10), which are electrically connected to the contact surface (9) of the contact opening (3) of the printed circuit board (2).

12. The power connection device according to any one of the preceding claims, wherein the second connecting element (1B) of the power connection device (1) can be pulled or pressed out of the first connecting element (1A) of the power connection device (1) for interrupting the electrical contact between the contact surface (11) of the first connecting element (1A) and the contact opening (3) of the printed circuit board (2).

13. A printed circuit board (2) with at least one contact opening (3), into which a power connection device (1) according to one of the preceding claims 1 to 12 is pressed to establish an electrical contact.

14. A method for the assembly of a power connection device (1) according to any one of the preceding claims 1 to 12 on a printed circuit board (2), comprising the steps of: - Insertion (Sl) of the first connecting element (1A) of the power connection device (1) into a contact opening (3) of the printed circuit board (2), wherein the first connecting element (1A) of the power connection device (1) is supported by an auxiliary mounting element (5), and - Pressing (S2) of the second connecting element (1B) of the power connection device (1) against the first connecting element (1A) of the power connection device (1), so that the two connecting elements (1A, 1B) of the power connection device (1) are displaced against each other and the outer contact surface (11) of the first connecting element (1A) is pressed against the contact surface (9) of the contact opening (3) of the printed circuit board (2) to establish an electrical contact, wherein a predetermined breaking connection (12) is arranged between the thorn-shaped section (6) of the second connecting element (1B) and the first connecting element (1A), which breaks open as soon as the thorn-shaped section (6) of the second connecting element (1B) is pressed into the first connecting element (1A).