Printed circuit board, method for manufacturing printed circuit board, electrical device, and apparatus

Abstract

The invention relates to a printed circuit board (1) having at least one conductor path (5) and a contact region (4) for contacting an electrical component (2), the contact region (4) having at least one contact surface (7) and a recess (8), the contact surface (7) extending into the recess (8), the contact surface (7) being connected to the conductor path (5).

Description

Field of the Invention

[0001] The present invention relates to a printed circuit board (Leiterplatte), a method for manufacturing a printed circuit board, an electrical device, and an apparatus. Background Art

[0002] US2019 / 148857 A1 discloses a flat connection structure for a cable.

[0003] DE 10036900 A1 shows a method for bringing a flexible printed circuit board into contact with a contact partner and an arrangement consisting of a flexible printed circuit board and a contact partner.

[0004] JPH08293340A discloses an elastomeric connector.

[0005] JP2017022217A shows a housing for an electronic component and a ceramic wiring board. Summary of the Invention

[0006] In the case of a printed circuit board having at least one printed conductor (Leiterbahn) and a contact area for contacting an electrical component, the core of the present invention lies in that the contact area has at least one contact surface and a recess, wherein the contact surface extends into the recess, and wherein the contact surface is connected to the printed conductor.

[0007] The background of the present invention is that electrical components with any contact geometry can be contacted via a printed circuit board. For this purpose, the contact surface can be placed flat on the contact of the electrical component and can be connected to the contact, in particular, can be connected in a material-locking manner.

[0008] Advantageously, the contact surface extends over the entire length of the recess and / or partially covers the recess.

[0009] Other advantageous embodiments of the present invention are the subject matter of the dependent claims.

[0010] According to an advantageous design, the contact surface has a coating, in particular, wherein the contact surface has a coating at two opposite surfaces respectively. Thereby, the contact surface is protected against oxidation and / or mechanical stress. Advantageously, the connection between the contact surface and the contact of the electrical component is mechanically supported.

[0011] Herein, it is advantageous that the contact surface has a greater thickness than the printed conductor. Thus, the contact surface can be designed to be robust.

[0012] Herein, it is also advantageous that the contact surface has a greater width than the printed conductor. Thereby, the electrical contact resistance can be reduced.

[0013] According to another advantageous design, the printed circuit board has at least one connecting web that conductively connects at least one printed conductor to the edge region of the printed circuit board, wherein the connecting web is spaced apart from the contact region. Thus, the printed circuit board can be contacted via the connecting web for coating the contact surface. By arranging the connecting web outside the contact region, accidental contact can be avoided.

[0014] Furthermore, it is advantageous if the printed circuit board has at least one additional connecting web that is arranged between two printed conductors and is interrupted by a recess, wherein the connecting web is spaced apart from the contact region. Thereby, a conductive connection can be achieved via the connecting web for coating the contact surface, and then this conductive connection is interrupted by the recess in order to prevent a short circuit between the printed conductors. By arranging the connecting web outside the contact region, accidental contact can be avoided.

[0015] The printed circuit board is advantageously designed as a flexible printed circuit board. Here, it is advantageous if the printed circuit board is deformable, so that a flexible mounting position can be achieved.

[0016] Regarding a method for manufacturing a printed circuit board (in particular as described above or according to one of the claims related to the printed circuit board) that has printed conductors, contact surfaces, and connecting webs, the core of the invention lies in electrically contacting and coating the contact surfaces via the printed conductors and the connecting webs, wherein subsequently, in particular by introducing a recess, in particular stamping it, into the printed circuit board at the location of the connecting web, the connecting web is interrupted.

[0017] The background of the invention is that a conductive connection can be achieved via the connecting web for coating the contact surface, and then this conductive connection is interrupted by a recess to prevent a short circuit on the printed circuit board.

[0018] Regarding an electrical device, in particular an electrical energy storage device, the core of the invention lies in that the electrical energy storage device has a printed circuit board as described above or a printed circuit board according to one of the claims related to the printed circuit board and electrical components, wherein the printed circuit board contacts the electrical components.

[0019] The background of the invention is that the electrical device can be designed to be compact.

[0020] According to an advantageous design, the contact surface of the printed circuit board is connected to the contact pins of the electrical components, in particular in a material-locking manner, in particular adhesively connected and / or welded and / or soldered. Thereby, any contact geometry of the electrical components can be contacted in a simple manner.

[0021] As far as the device, especially a vehicle, is concerned, the core of the present invention lies in that the device has the electrical device as described above or an electrical device according to one of the claims related to the electrical device.

[0022] If meaningful, the above design solutions and improvement solutions can be combined with each other arbitrarily. Other possible design solutions, improvement solutions and implementation solutions of the present invention also include combinations not explicitly mentioned of the features of the present invention described previously or hereinafter with respect to the embodiments. In particular, those skilled in the art will also add various aspects here as improvements or supplements to the corresponding basic forms of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the following paragraphs, the present invention is explained by means of embodiments, from which further inventive features can be obtained, but the present invention is not limited in its scope to these inventive features. The embodiments are shown in the drawings.

[0024] Wherein:

[0025] Figure 1 A schematic view of a first embodiment of an electrical printed circuit board 1 according to the present invention is shown, which is connected to an electrical component 2;

[0026] Figure 2 A top view of the electrical printed circuit board 1 and the electrical component 2 is shown;

[0027] Figure 3 A schematic cross-sectional view of the electrical printed circuit board 1 is shown;

[0028] Figure 4 A top view of a second embodiment of an electrical printed circuit board 11 according to the present invention at a first time point during the manufacture of the electrical printed circuit board 11 is shown;

[0029] Figure 5 A top view of a second embodiment of the electrical printed circuit board 11 according to the present invention at a second time point after the completion of the electrical printed circuit board 11 is shown; and

[0030] Figure 6 A method for manufacturing the printed circuit board 11 is shown. DETAILED DESCRIPTION OF THE INVENTION

[0031] Figure 1 The electrical printed circuit board 1 shown has two contact areas 4 for electrically contacting the electrical component 2. The contact areas 4 extend here from the printed circuit board 1 to the electrical component 2. The contact areas 4 are spaced apart from each other and extend substantially parallel to each other.

[0032] The electrical component 2 has two contact pins 3 protruding from the housing of the electrical component 2. The contact pins 3 are designed to be flat.

[0033] The corresponding contact area 4 is placed on the corresponding contact pin 3 and connected thereto, in particular in a material-locking manner, such as by an adhesive connection and / or a fusion weld connection and / or a soldering connection.

[0034] The printed circuit board 1 is preferably designed as a flexible printed circuit board.

[0035] As Figure 2 shown, the printed circuit board 1 has two printed conductors 5, in particular copper printed conductors, four contact recesses 8 and two contact surfaces 7.

[0036] Two contact recesses 8 each extend along the extension direction of the corresponding contact surface 7 beside the contact surface 7. Here, one contact recess 8 is arranged above the contact surface 7 and the other contact recess 8 is arranged below the contact surface 7.

[0037] Each contact area 4 has one contact surface 7 and two contact recesses 8.

[0038] Each contact surface 7 is connected to the printed conductor 5 in the plane of the printed circuit board. Here, the printed conductor 5 extends from the contact surface 7 and the contact area 4 into the printed circuit board 1.

[0039] The corresponding contact surface 7 is placed on the corresponding contact pin 3 and connected thereto, in particular in a material-locking manner, such as by an adhesive connection and / or a fusion weld connection and / or a soldering connection.

[0040] Additionally, each contact area 4 is connected to the contact pin 3 by an adhesive tape 6 in the area of the printed conductor 5. Here, the adhesive tape 6 extends transversely to the extension direction of the printed conductor 5 over at least the entire width of the printed conductor 5 and covers the printed conductor.

[0041] The contact surface 7 has a greater width than the printed conductor 5 in the transverse direction with respect to the extension direction of the printed conductor 5.

[0042] In Figure 3 shown, the printed circuit board 1 in the area of the contact area 4 is shown in a sectional view.

[0043] The printed circuit board 1 has the printed conductor 5 as a conductor plane (Leiterebene). The printed conductor 5 is arranged between two plastic layers 9. Here, the printed conductor 5 is connected to the corresponding plastic layer 9 by a connection layer 8 respectively. The corresponding plastic layer 9 is made of polyimide, for example. The corresponding connection layer 8 is made of an adhesive, for example.

[0044] In the area of the contact surface 7, the printed circuit board 1 has a metal coating instead of the plastic layer 9 and the connection layer 8. The metal coating is made of tin, for example.

[0045] Thus, in the region of the contact surface 7, the printed conductor 5 is reinforced and has a greater thickness than the printed conductors 5 between the plastic layers 9.

[0046] Figure 4 A second embodiment of an electro-printed circuit board 11 during manufacture is shown.

[0047] The printed circuit board 11 has a contact region 14 in which four contact surfaces 17 are arranged.

[0048] The contact surfaces 17 are arranged offset from one another. Each contact surface 17 extends between two contact recesses 18.

[0049] Each contact surface 17 is connected to a respective printed conductor 15 which extends from the contact region 14 into the printed circuit board 11.

[0050] A connecting web 25 is arranged between each two respective printed conductors 15. Here, the connecting web 25 is arranged at a distance from the contact region 14. At least one connecting web 25 extends from the printed conductor 15 up to the edge region of the printed circuit board 11.

[0051] The connecting web 25 serves for electrically contacting the printed conductors 15 during coating of the contact surfaces 17, for example by electroplating. For this purpose, at least one connecting web 25 is contacted at the edge region of the printed circuit board 11.

[0052] In Figure 5 the printed circuit board 11 at a second time point is shown, at which time point the printed circuit board is completed.

[0053] The printed circuit board 11 differs from the previously described one at this time point in that the printed circuit board 11 has a respective recess 28 at the location of each connecting web 25.

[0054] After coating the contact surfaces 17, the recesses 28 are introduced, for example punched, into the printed circuit board 11 in order to interrupt the conductive connection between the printed conductors 15. Here, the recesses 28 are arranged at a distance from the contact region 14.

[0055] In Figure 6 a method for manufacturing a printed circuit board 11 is shown, which printed circuit board has metal printed conductors 15, contact surfaces 17 and connecting webs 25 as well as two plastic layers 9.

[0056] In a first method step 101, the printed conductors 15, the contact surfaces 17 and the connecting webs 25 are arranged between two plastic layers 9 and connected to them. Here, the plastic layers 9 have contact recesses 18 on which the contact surfaces 17 are arranged.

[0057] In a second method step 102, the contact surface 17 is coated, in particular electroplated. For this purpose, at least one connecting web 25 is electrically contacted at the edge region of the printed circuit board 11.

[0058] In a third method step 103, the connecting web 25 is interrupted by introducing recesses 28 into the printed circuit board 11. The printed circuit board 11 is preferably punched. Here, a respective recess 28 is arranged at the location of each connecting web 25 such that all connecting webs 25 are electrically insulated.

[0059] The electrical energy storage here refers to a rechargeable energy storage, in particular having an electrochemical energy storage cell and / or an energy storage module (which has at least one electrochemical energy storage cell) and / or an energy storage pack (which has at least one energy storage module). The energy storage cell can be designed as a lithium-based battery cell, in particular a lithium-ion battery cell. Alternatively, the energy storage cell is designed as a lithium polymer battery cell or a nickel metal hydride battery cell or a lead acid battery cell or a lithium-air battery cell or a lithium-sulfur battery cell or designed as a sodium-ion battery cell.

[0060] The vehicle is understood here to mean a land vehicle, such as a passenger car or a goods vehicle, or an aircraft or a ship, in particular at least partially electrically driven. The vehicle is, for example, a battery electric vehicle with a pure electric drive, or a hybrid vehicle with an electric drive and an internal combustion engine.

Claims

1. A printed circuit board (1, 11) having at least one conductor track (5, 15) and a contact area (4, 14) for contacting an electrical component (2), It is characterized in that The contact region (4, 14) has at least one contact surface (7, 17) and a recess (8, 18), wherein the contact surface (7, 17) extends into the recess (8, 18), The contact surfaces (7, 17) are connected to the conductor tracks (5, 15).

2. The printed circuit board (1, 11) according to claim 1, It is characterized in that The contact surface (7, 17) has a coating, in particular the contact surface (7, 17) has a coating on two opposite surfaces, In particular, the contact surface (7, 17) has a greater thickness than the conductor track (5, 15).

3. A printed circuit board (1, 11) according to any one of the preceding claims, It is characterized in that The contact surface (7, 17) has a greater width than the conductor track (5, 15).

4. A printed circuit board (11) according to any one of the preceding claims, It is characterized in that The printed circuit board (11) has at least one connecting web (25) which electrically conductively connects at least one conductor track (15) to an edge region of the printed circuit board (11). Therein, the connecting web (25) is spaced apart from the contact region (14).

5. A printed circuit board (11) according to any one of the preceding claims, It is characterized in that The printed circuit board (11) has at least one connecting web (25) which is arranged between two conductor tracks (15) and is interrupted by a recess (28). Therein, the connecting web (25) is spaced apart from the contact region (14).

6. A printed circuit board (1, 11) according to any one of the preceding claims, It is characterized in that The printed circuit boards (1, 11) are designed as flexible printed circuit boards.

7. A method for producing a printed circuit board (1, 11), in particular according to any one of the preceding claims, having conductor tracks (5, 15), contact surfaces (7, 17) and connecting webs (25), It is characterized in that Electrical contacting and coating of the contact surfaces (7, 17) by means of conductor tracks (5, 15) and connecting webs (25), Therein, the connecting web (25) is subsequently interrupted, in particular by introducing, in particular punching, a recess (28) into the printed circuit board (1, 11) at the location of the connecting web (25).

8. An electrical device, in particular an electrical energy storage device, comprising a printed circuit board (1, 11) and an electrical component (2) according to any one of claims 1 to 6, in, The printed circuit board (1, 11) is in contact with the electrical component (2).

9. The electric device according to claim 8, It is characterized in that Contact surfaces (7, 17) of printed circuit boards (1, 11) are connected to contact pins (3) of electrical components (2), in particular by material bonding, in particular by adhesive bonding and / or welding and / or soldering.

10. An apparatus, in particular a vehicle, comprising an electrical device according to claim 8 or 9.

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