Electrical feedthrough and method for manufacturing electrical feedthrough

Abstract

This invention provides an electrical feedthrough that allows the substrate to be handled as a bulk item without damaging the sealing surface, thereby simplifying the manufacturing of electrical feedthroughs. [Solution] The electrical feedthrough includes a substrate (10) having a sealing region and at least one opening (12), and an electrical conductor guided through the opening (12), the electrical conductor being held within the opening (12) by a fixing material, the fixing material sealing the opening (12). The edges surrounding the opening (12) are formed sharply, and all edges of the outer contour of the substrate (10) are provided with chamfered or rounded portions (18), the chamfered or rounded portions (18) having dimensions or a radius r in the range of 0.3 mm to 2 mm.

Description

Technical Field

[0001] The present invention relates to an electrical feed-through including a substrate having at least one opening and an electrical conductor guided through the opening, the conductor being held in the opening by a fixing material, and the fixing material sealing the opening. Another aspect of the present invention relates to a method of manufacturing such an electrical feed-through.

[0002] Prior Art Housings for electrical or electronic components generally require a number of electrical feed-throughs to enable electrical connection from the outside to the inside of the housing where, for example, components of an electric compressor (E-compressor) are present. Such electrical feed-throughs must be sealed liquid-tight or even gas-tight in order to protect the components within the housing from the surroundings and / or to retain gas or liquid inside the housing. To obtain such liquid-tight or gas-tight feed-throughs for electrical conductors arranged within the openings of the housing, glass-to-metal feed-throughs can be used. In this case, a fixing material, such as a glass material, is used to seal the opening and hold the conductor within the opening. The fixing material is also used for electrical insulation between the conductor and the housing.

[0003] In known feed-throughs, a substantially plate-shaped element forms the substrate through which the electrical conductor is guided. The substrate here can then be inserted into an opening of an electrical or electronic device, such as the housing of an E-compressor. In order to ensure a seal between the substrate and the housing, the sealing surface of the substrate must be smooth and flat.

[0004] From WO 2021 / 070817, electrical feed-throughs are known in which the external conductor or substrate has a frame-shaped or beam-shaped extension section as a reinforcing structure. The electrical feed-through can surround the entire external conductor or can be arranged only on the longitudinal sides of the plate-shaped substrate.

[0005] To form frame-like or beam-like extension sections, a plate-like base is first punched out from a strip, followed by deformation using a multi-stage stretching process, such as deep drawing. The edges of the base produced during punching are sharp and have a radius of less than 0.3 mm. If these bases are handled as bulk goods that may collide with each other, each sealing surface may be damaged by these sharp edges, rendering each sealing surface no longer smooth and unsuitable as a sealing surface.

[0006] However, in order to simplify and efficiently configure the manufacturing process during the production of electrical feedthroughs, it is desirable to handle one or more substrates as bulk items.

[0007] The object of the present invention is to provide an electrical feedthrough that can be handled as a bulk item without damaging the sealing surface, and thereby simplify the manufacturing of electrical feedthroughs.

[0008] Disclosure of the invention An electrical feedthrough is proposed, comprising a substrate having a sealing region and at least one opening, and an electrical conductor guided through the opening, wherein the conductor is held within the opening by a fixing material, and the fixing material seals the opening. Here, the edges surrounding the opening are formed sharply, and all edges of the outer contour of the substrate are chamfered or rounded, and the chamfered or rounded portions are configured to have a size or radius r in the range of 0.3 mm to 2 mm, preferably in the range of 0.5 mm to 1.5 mm, and particularly preferably in the range of 0.75 mm to 1.0 mm.

[0009] The base is preferably constructed in the form of a plate with a roughly rectangular basic shape. In this case, the vertical sides of the base, and thus the vertical edges, are formed in a straight line. The horizontal sides of the base can also be formed in a straight line, but curved shapes and combinations of straight and curved sections are also possible. For example, the horizontal side can have an arc shape with a radius approximately equal to half the width of the base, i.e., B / 2. Furthermore, the central straight section may be provided with a transition section that curves toward the vertical side. In another example, the central horizontal side is provided with a curved section that transitions toward the vertical side via two short straight sections or chamfered sections.

[0010] Preferably, the side ratio L / B of the longest side to the width B of the substrate is in the range of 1.5 to 10, particularly preferably in the range of 2 to 5. A larger side ratio allows for more through-guided conductors to be placed in parallel within the same electrical feedthrough.

[0011] The substrate preferably has vertical edges, in which case the edges or edges are at an angle of approximately 90° with respect to the top and bottom surfaces of the substrate. The term "approximately" here includes manufacturing tolerances, particularly an angle deviation of ±5°.

[0012] The chamfered or rounded portions provided are located at least on the edges of the outer contour of the base body. The edges of the outer contour are the edges that form a transition from the top or bottom surface to the vertical edge when the base body is configured in a substantially rectangular shape. In the case of a rounded portion, the corresponding edge is provided with a radius in the range of 0.3 mm to 2 mm, preferably in the range of 0.5 mm to 1.5 mm, and particularly preferably in the range of 0.75 mm to 1.0 mm. In the case of a chamfered portion, a stepped transition is formed from the top or bottom surface to the vertical edge, where the transition is formed to have at least two stepped portions with angles less than 90° each, i.e., 45° each or 30° and 60° each, instead of an angle of approximately 90°. Here, the size of the chamfered portion is the distance between the two stepped portions, and here the size is in the range of 0.3 mm to 2 mm, preferably in the range of 0.5 mm to 1.5 mm, and particularly preferably in the range of 0.75 mm to 1.0 mm.

[0013] The feedthrough substrate preferably has a plurality of openings through which electrical conductors are guided and held by a fixing material. In this case, the fixing material seals the walls of the openings and the conductors. The feedthrough here preferably includes two to five guided conductors, for example, exactly three electrical conductors. However, the feedthrough may instead include exactly one guided electrical conductor.

[0014] The base may include another opening that functions as a fixing opening. The feedthrough can be fixed to the housing member through the fixing opening, for example, by screws.

[0015] An opening through which at least an electrical conductor passes and which is held in place by a fixing material has a sharp edge at the transition from the inner wall of the opening to the upper and lower surfaces of the substrate. The edge is considered sharp if it does not have a rounded or chamfered portion, or if it has a rounded or chamfered portion with a radius or size of less than 0.3 mm, particularly preferably less than 0.2 mm, and most preferably less than 0.1 mm. Since a steep and perfectly sharp transition is not practically achievable, the radius of the sharp edge is usually greater than 50 nm. The sharp edge of the opening can be formed, for example, by punching.

[0016] Sharp edges at the transition of the opening to the inner wall have the advantage of allowing the fastener and the inner wall to abut each other with a straight, vertical wall. In the case of rounded or chamfered edges, the wall curves away from the fastener in the closed area above the fastener, which may weaken the bond between the wall and the fastener. Under mechanical load, a portion of the fastener may delaminate in that area, potentially weakening or improperly sealing the feedthrough as a whole.

[0017] Furthermore, one or more notches can be placed along the outer edge or outer contour of the substrate. These notches allow for unique orientation in a substrate that would otherwise be symmetrically formed along one or more points or one or more planes if no notches were provided. In particular, this allows for differentiation between the upper and lower surfaces of the substrate. In the punching process, differences typically arise due to slight bends or curves between the upper and lower surfaces of the member, where, for example, the upper surface may be slightly convex and the lower surface slightly concave. In this case, one orientation can be made more advantageous than the other for assembly into the feedthrough housing.

[0018] The upper and / or lower surfaces of the feedthrough substrate are provided with a substantially smooth and flat sealing area, particularly free from cuts and scratches. Through this sealing area, a sealing element, such as an O-ring, can seal the sealing area of ​​the substrate and the sealing area of ​​the housing. Furthermore, the sealing area of ​​the substrate is preferably formed flat, in which case the sealing area preferably has a flatness deviation of ≤0.1 mm in accordance with DIN EN ISO 1101 as of September 2017, particularly a flatness deviation in the range of 0.005 mm to 0.02 mm per 10 mm length.

[0019] Preferably, the substrate is provided with a surface coating. By using a coating, the resistance of the substrate material to environmental influences, especially corrosive ones, can be enhanced.

[0020] The surface coating is preferably a nickel layer, which can be deposited electrochemically or chemically onto the surface of the substrate metal material. In the case of electrochemical coating, the coating is preferably obtained by drum coating. The coating is preferably distributed over the entire surface of the substrate and preferably free from gaps or defects.

[0021] Preferably, the substrate is made of a metal, where the metal is preferably selected from the group including steel, particularly non-alloy steel, such as material number 1,0338 steel or stainless steel, NiFe, Kovar, titanium and copper.

[0022] Metal parts, particularly deformed metal parts, have a fiber-like structure called fiber flow or forging lines. Fiber flow can be visualized, for example, in a cross-section passing through a metal component by a wet chemical etching process. Fiber flow, and in this case particularly its direction, is controlled by deformation processes such as deep drawing.

[0023] Since metallic materials have maximum mechanical stability parallel to the fiber flow, the longitudinal sides of the substrate, which are correspondingly exposed to a very high risk of shearing or bending, are configured to be oriented parallel to the fiber flow. This improves the bending stiffness along the longest direction of the substrate without the use of additional materials.

[0024] Preferably, the substrate is made from a wire-formed material that can be obtained by rolling a wire. In the case of a wire material, the fiber flow is oriented along the wire direction based on the wire drawing process. By rolling the wire, the cross-sectional shape of the wire material can be adapted without changing the fundamental orientation of the fiber flow. Preferably, the substrate is obtained from a wire-formed material whose cross-section has a height corresponding to the thickness of the substrate and a width corresponding to the width of the substrate. By cutting a member piece to a length corresponding to the length of the substrate, a substrate having length L, width B and thickness D is obtained. Since the long side is oriented along the wire drawing direction of the wire-formed material, the fiber flow becomes parallel to the long side of the substrate in this way.

[0025] Since the base is cut from the wire-formed material at a width B along its short side, the resulting cut or punching length is significantly shorter compared to cutting from a plate or cutting at a length L along the longer vertical side. This makes it possible to manufacture the base using a smaller punching machine with lower tool costs.

[0026] An electrical conductor is made of a conductive material, such as a metal. Preferably, at least one electrical conductor is made of a conductive material selected from the group including steel, especially stainless steel, nickel-iron alloys, and copper. Furthermore, the conductor may have a core made of a highly conductive material such as copper, and an outer sleeve made of another material.

[0027] The fixing material is preferably a glass material or a glass-ceramic material. The electrical conductor is held within the opening of the substrate via the fixing material and is electrically insulated from the substrate. Further, the fixing material seals the opening with respect to the inner wall of the opening and the electrical conductor.

[0028] Preferably, the substrate, at least one conductor and the fixing material form a glass-metal feed-through in the form of a compression-sealed glass. Thus, the first coefficient of thermal expansion of the substrate is preferably selected to be greater than the second coefficient of thermal expansion of the fixing material. In order to obtain a compression-sealed glass, the difference between the first coefficient of thermal expansion and the second coefficient of thermal expansion in the temperature range from 300 K to 600 K is preferably at least 2 ppm / K, more preferably at least 5 ppm / K. The third coefficient of thermal expansion of the conductor material of the electrical conductor is preferably selected to be approximately equal to or less than the second coefficient of thermal expansion of the fixing material. Two coefficients of thermal expansion are considered to be approximately equal if the difference is less than 2 ppm / K.

[0029] In connection with an embodiment of the feed-through as a compression glass feed-through in which the fixing material passing through the substrate is under a compression pressure, an advantageous effect is brought about by the orientation of fiber flow or forging streamline parallel to the longitudinal side of length L. This is because, by doing so, particularly high strength can be obtained with only a small material consumption and small dimensions.

[0030] Instead of the compression-sealed glass, the material of the substrate, the fixing material and the conductor material can be selected such that their coefficients of thermal expansion are approximately equal, where a difference of less than 2 ppm / K is considered to be approximately equal. In this variant, the substrate, at least one conductor and the fixing material form a tailored glass-metal feed-through.

[0031] The formed glass-metal feed-through is preferably airtight, in which case less than 1·10 -7 mbar l / s under a pressure difference of 1 bar, preferably less than 1·10 -8A feedthrough with a He leak rate of less than mbar l / s is considered airtight.

[0032] Preferably, the substrate has a reinforcing structure at least on the longitudinal edge, and the reinforcing structure is preferably formed as a raised edge region that is offset perpendicularly to the base surface of the substrate.

[0033] Preferably, the raised edge region is offset perpendicularly to the base surface of the substrate, where the thickness S1 of the edge region corresponds to the thickness D of the substrate. For this reason, the raised edge region can be deformed by shear deformation (Schubumformen). As a result, the joint or joining region between the raised edge region and the rest of the substrate has a height smaller than the thickness of the substrate.

[0034] The base is preferably made of a metallic material, in which case the raised edge region is obtained from a flat blank by shear deformation. In this case, the base surface is particularly a plane that unfolds in the longitudinal and transverse directions, or a plane that is oriented perpendicular to the axis of the opening of the base and is tangent to the edge region. Therefore, the vertical offset causes the material of the base to be offset perpendicular to the base surface.

[0035] Vertical offset or shear deformation processing to obtain a raised edge region compresses the fiber flow of the substrate metal material at the joint and bisects it above or below the joint.

[0036] In the case of a roughly rectangular base, the raised edge region is preferably located at least on the longitudinal edge, in which case the edge region can be located along the entire length of the longitudinal side. However, the edge region may have interruptions and / or may be located only on a portion of the longitudinal side. Furthermore, the raised edge region may be located on the transverse side, in which case the raised edge can be located along the entire length of the transverse side, may have interruptions, and / or may be located only on a portion of the transverse side. Preferably, the raised edge region, for example, a reinforcing ring, is located completely around the outer contour of the base. Instead of a rectangular basic shape, the base may be formed, for example, into a circular shape, in which case the raised edge region preferably forms a ring and completely surrounds the outer contour of the base.

[0037] The vertical offset of the material to obtain the raised edge region creates a complementary step on the underside of the base. This step can be used as a mechanical stopper or centering aid when the feedthrough is inserted into the housing opening at the base. This allows for more precise positioning of the electrical feedthrough relative to the housing and facilitates the assembly of the electrical feedthrough.

[0038] On the upper surface of the substrate, a raised edge region forms a wall. This wall can be used as a mechanical stopper or centering aid for additional insulating elements placed on the electrical feedthrough. For example, such additional insulating elements, manufactured from elastic materials or thermoplastic or thermosetting plastics, can be used to extend the insulation distance or creepage distance between one of several guided electrical conductors and the feedthrough substrate.

[0039] Preferably, a raised or recessed reinforcing region is formed around at least one opening, in which case the raised or recessed reinforcing region is offset perpendicularly to the base surface of the substrate, and the thickness of the raised or recessed reinforcing region corresponds to the thickness of the substrate. The reinforcing region can be obtained by shear deformation processing, similar to the edge region.

[0040] If the substrate has two or more openings, a separate raised or recessed reinforcing region may be provided for each opening. Alternatively, a single raised or recessed reinforcing region may be provided that surrounds all openings for guiding electrical conductors. In this case, any fixing openings, if present, may be located outside the raised or recessed reinforcing regions.

[0041] The edge regions and, optionally, reinforced regions are obtained simply by offsetting the substrate material perpendicularly to the base surface of the substrate; therefore, no additional material is required to form these regions. The amount of material corresponds precisely to the amount of material for a flat substrate having the same dimensions in terms of length and width for a rectangular base shape or diameter for a circular base shape. Nevertheless, the mechanical stability of the substrate is improved, and in particular, its resistance to bending is enhanced.

[0042] Edges resulting from vertical offsets are rounded or chamfered, at least if these edges are part of the outer contour.

[0043] Preferably, rounded or chamfered portions are provided on all edges of the base that do not surround the opening around the base.

[0044] In particular, when manufacturing using shear deformation, the raised edge region and / or the raised or recessed reinforced region are offset from the base surface of the base by an amount less than the thickness D of the base. In this case, the base surface is the original surface of the plate-shaped base or base blank that exists before the deformation process is applied, and corresponds to the surface that is in contact with the raised edge region after shear deformation.

[0045] Preferably, the raised edge region and / or the raised or recessed reinforced region are vertically offset by a range of 20% to 80% with respect to the thickness D of the substrate.

[0046] Next, the base body can be obtained from a flat blank by shear deformation, where the blank has a thickness D and also has the length and width or diameter of the completed base body. In this case, the surface of the blank can be considered the base surface. In this case, the edge region and / or reinforcement region can be obtained by offsetting the blank perpendicular to the base surface.

[0047] The raised edge regions and / or reinforced regions are obtained by the vertical offset of the blank material, so that the substrate has the same constant thickness D in all regions, i.e., the edge regions, reinforced regions and the raw substrate region. No additional material is required to form the edge regions and / or reinforced regions.

[0048] The electric feedthrough described herein is particularly suitable for compressors. In this case, the electric feedthrough is particularly suitable for application in electrically driven compressors, so-called E-compressors, which are used for cooling the cabins of electrically driven vehicles.

[0049] Accordingly, the electrical feedthrough is preferably formed as a connection terminal for an E-compressor.

[0050] A further aspect of the present invention is to provide a method for manufacturing the electrical feedthrough described herein. Accordingly, the features described in the framework of the electrical feedthrough also apply to the method, and conversely, the features described in the framework of the method also apply to the electrical feedthrough.

[0051] A method for manufacturing an electrical feedthrough described herein involves forming a substrate having at least one opening from a blank, wherein the edges surrounding the opening are sharply formed, and at least the edges of the outer contour of the substrate have chamfered or rounded portions with a radius r in the range of 0.3 mm to 2 mm. The method then involves inserting a fixing material blank and a conductor into at least one of the openings, and performing a heat treatment to form a fixing material from the fixing material blank.

[0052] Preferably, forming the opening and providing chamfered and / or rounded edges are performed in a single common work step. This step may be, for example, a combination of punching and embossing.

[0053] In one variation of this method, the base body is formed from a wire material. In this case, the wire material is rolled to a predetermined cross-sectional shape in which the length of the long side corresponds to the width B of the transverse side of the base body and the length of the short side corresponds to the thickness D of the base body. Forming the base body involves separating the blank from the wire material, where the length of the longitudinal side of the blank corresponds to the length L of the longitudinal side of the base body, and the edges of the wire material already have a rounded portion with radius r before the blank is separated. In this case, after separation, this rounded portion forms a rounded portion along the longitudinal edge of the base body. The separation of the blank can be performed in a single process, together with punching out the opening.

[0054] The raised edge regions that reinforce the bending rigidity of the base material are preferably manufactured by shear deformation processing.

[0055] Preferably, the substrate is electrochemically coated with nickel using a drum coating method after the final shape is obtained, i.e., before the insertion of the fixing material blank and conductor and the heat treatment are performed.

[0056] During drum coating, a conductive drum forms electrical contact with the substrate to be coated. In this case, the substrate is present inside the drum along with the electrolyte, but as the drum rotates, a uniform coating is gradually applied to the entire surface.

[0057] In this case, it is advantageous that the substrate has edges that are exclusively rounded or chamfered on their outer contour. In this case, the substrates can be electrochemically coated as they are in electrical contact with each other within the drum or with adjacent substrates. As the drum rotates, the substrates move relative to each other and collide with one another, at which point each part of the substrate is exposed to the electrolyte. However, the rounded or chamfered edges keep the surface of the substrate smooth and free from cuts and / or scratches. Thus, the sealing surface is maintained.

[0058] Unlike current-free processes for depositing nickel layers, nickel layers deposited by electrolysis contain little to no phosphorus as an impurity. Compared to electrochemical methods in which the components to be coated individually make electrical contact with electrodes, the coating is completely sealed and has no defects at the points of electrical contact.

[0059] The present invention will be described in detail below with reference to the drawings, but without limitation. The same reference numerals represent the same or similar elements. The drawings show the following: [Brief explanation of the drawing]

[0060] [Figure 1] This is a perspective view showing a substrate with a rounded outer edge. [Figure 2] This is a cross-sectional view of the substrate from the side. [Figure 3] This is a lateral cross-sectional view showing an electrical feedthrough with a substrate. [Figure 4] This is a cross-sectional view from the side showing a substrate having a reinforcing structure. [Figure 5] This is a perspective view showing a substrate having a reinforcing structure and a reinforcing region. [Figure 6] This figure shows rolled wire material as the starting product. [Figure 7] This is a perspective view showing a substrate obtained from wire material.

[0061] Figure 1 shows a schematic perspective view of a base 10 for an electrical feedthrough 1 (see Figure 3). In the illustrated example, the base 10 is roughly rectangular in shape, with a long side 24 of length L formed in a straight line and a short side 22 formed in an arc shape with radius R. A chamfered portion 28 is formed at the transition between the short side 22 and the long side. The base 10 has a width B.

[0062] In order to guide the electrical conductor 30 (see Figure 3), the example shown in Figure 1 is provided with three openings 12. Additionally, the base 10 shown in Figure 1 has two fixing openings 14 through which the base 10 can be screwed to, for example, a housing.

[0063] The base body 10 has a vertical edge portion 34, in which case the vertical edge portion 34 or the surface of the vertical edge portion 34 is at an angle of approximately 90° with respect to the upper surface 32 and the lower surface of the base body 10.

[0064] As can be seen in Figure 1, a rounded portion 18 with radius r is positioned along the outer contour that forms the transition from the upper surface 32 or lower surface to the vertical edge portion 34. In contrast, the contour that forms the transition from the upper surface 32 or lower surface of the base body 10 to the inner wall of the opening 12 and the fixing opening 14 is formed sharply.

[0065] To eliminate symmetry, a notch 19 is placed at one location on the outer contour of the substrate 10. By eliminating symmetry, the upper surface 32 and the lower surface of the substrate 10 can be distinguished more clearly.

[0066] Figure 2 shows a cross-sectional view of the base body 10 shown in Figure 1, viewed from the side. As can be clearly seen from this figure, the outer contour of the rounded portion 18 has a radius r, while the transition from the upper surface 32 or lower surface of the base body 10 to the inner wall of the opening 12 and the fixing opening 14 is formed sharply. To increase bending rigidity, in the illustrated example, the forging lines or fiber structure 16 of the metal material of the base body 10 are oriented parallel to the longitudinal side 24 of length L.

[0067] Figure 3 shows an electrical feedthrough 1 comprising the base 10 described in relation to Figures 1 and 2. Conductors 30 are guided through each of the openings 12, and each conductor 30 is held within each opening 12 by a fixing material 20. In this case, the fixing material 30 seals against the conductor 30 and the inner wall of the opening 12, respectively.

[0068] Figures 4 and 5 show a second example of the base 10. Here, the base 10, like the base 10 described with respect to Figures 1 and 2, has three openings 12 and two fixing openings 14 for guiding the conductor 30 through. In this case as well, the outer contour is provided with a rounded portion 18 of radius r. In contrast, the contours at the transitions between the openings 12 and the fixing openings 14 to the inner walls are sharply formed.

[0069] Unlike the examples in Figures 1 and 2, the base body 10 is not formed flat, but has a reinforcing structure 40 in the form of a raised edge region 42. This raised edge region 42 is offset perpendicularly to the base surface 11 of the base body 10 by shear deformation processing. A step is formed at the transition from the base surface 11 to the raised edge region 42, and this step reinforces the base body 10 against bending.

[0070] Figure 4 shows a cross-sectional view of the base body 10 having a raised edge region 42, viewed from the side. Figure 5 shows a perspective view of the base body 10 having a raised edge region, viewed from below. In the illustration in Figure 5, a sealing region 50 can be seen around the opening 12 on the lower surface.

[0071] Figure 6 schematically shows the rolled wire material 2. The wire material 2 has a cross-sectional shape with a length corresponding to the width B of the lateral side 22 of the substrate 10 to be manufactured (see Figure 7). The height H of the cross-sectional shape of the wire material 2 corresponds to the thickness D of the substrate 10 to be manufactured.

[0072] The rolled wire material 2 is obtained, for example, by rolling a drawn round wire. Rolling gives the original circular cross-section a rectangular cross-sectional shape with rounded corners, as shown in Figure 6. In this case, the rounded corners represent the rounded portion 18 of the longitudinal edge 25 of the rolled wire material 2, which has a radius r.

[0073] Figure 7 shows the base body 10 having the three openings 12 of the above example. The base body 10 has a roughly rectangular shape with a vertical side 24 of length L, a horizontal side 22 of width B, and a thickness D.

[0074] The base body 10 has a vertical edge portion 34, in which case the vertical edge portion 34 or the surface of the vertical edge portion 34 is at an angle of approximately 90° with respect to the upper surface 32 or lower surface of the base body 10. At the transition from the upper surface 32 or lower surface of the base body 10 to the vertical edge portion 34, the base body 10 has edges 23 and 25.

[0075] The vertical side 24 of the base 10 is formed in a straight line, and the horizontal side 22, in the example shown in Figure 2, is composed of two curved sections 26 and a straight section 29, each with a radius R, where the two curved sections 26 are each positioned adjacent to the vertical side 24.

[0076] The base 10 was obtained by cutting a blank of length L from the wire material 2 shown in Figure 6, providing an opening 12, and rounding the lateral edge 23. In this case, the longitudinal edge 25 is already rounded before cutting, because the longitudinal side 24 of the wire material 1 already has a corresponding rounded portion 18. In the embodiment shown in Figure 7, the same radius r as for rounding the longitudinal edge 25 is selected for rounding the lateral edge 23. Of course, a different radius r' can be selected for the lateral edge 23, or a chamfer can be provided instead of a rounded portion 18.

[0077] By providing rounded edges 18 on all edges 23, 25 of the outer contour of the base body 10, the base body 10 has no sharp edges on its outer contour that could damage the surface of the base body 10 when a large number of base bodies 10 are handled as bulk goods. Therefore, the surface of the base body 10 that can function as a sealing area 50, for example, the top surface 32, remains free from damage such as scratches or cuts. The sealing surface of the base body 10 remains smooth and free from defects.

[0078] In contrast, the edges at the transition from the wall of the opening 12 to the surface 32 do not have rounded or chamfered edges, and therefore remain sharp. This improves the glass welding of the fixing material 20 (see Figure 3) to the wall of the opening 12.

[0079] Although the present invention has been described based on preferred embodiments, the present invention is not limited thereto and can be modified in various ways. [Explanation of symbols]

[0080] 1. Electrical feedthrough 2 Wire materials 10 Base 11 Base 12 aperture 14 Fixing opening 16. Forging lines / fiber flow 18. Rounded part 19 Notches 20 Fixed material 22 Side side 23 Transverse edge 24 Vertical side 25 Vertical edge 26 Curved Sections 28 Chamfered section 29 Straight Section 30 conductors 32 Top side 34 Vertical edge 40 Reinforcement Structures 42. Elevated marginal region 50 seal area r: radius of the curved part R (Round of corner / edge) D Substrate thickness B Width of the base L is the length of the substrate.

Claims

1. Electrical feedthrough (1), The system includes a substrate (10) having a sealing region (50) and at least one opening (12), and an electrical conductor (30) guided through the opening (12), The conductor (30) is held in place within the opening (12) by a fixing material (20), and the fixing material (20) seals the opening (12). In electrical feedthrough (1), The edges surrounding the opening (12) are formed to be sharp. All edges of the outer contour of the base body (10) are provided with chamfered or rounded portions (18), and the chamfered or rounded portions (18) have a size or radius r in the range of 0.3 mm to 2 mm. An electrical feedthrough (1) characterized by the following.

2. The electrical feedthrough (1) according to claim 1, wherein the substrate (10) is provided with a surface coating, particularly a nickel layer, particularly an electrochemically coated nickel layer.

3. The substrate (10) has a substantially rectangular shape, The ratio L / B of the length L of the vertical side (24) to the width B of the horizontal side (22) of the base (10) is in the range of 1.5 to 10. The electrical feedthrough (1) according to claim 1 or 2.

4. The substrate (10) is made of a metallic material, and the fiber flow (16) of the metallic material is oriented parallel to the vertical side (24). The electrical feedthrough (1) according to claim 3.

5. The base body (10) has a reinforcing structure (40) at least on the edge of the vertical side (24), and the reinforcing structure (40) is preferably formed as a raised edge region offset perpendicularly to the base surface (11) of the base body (10). The electrical feedthrough (1) according to claim 3 or 4.

6. A raised or recessed reinforcing region is formed around at least one of the openings (12), and the raised or recessed reinforcing region is offset perpendicularly to the base surface (11) of the base body (10), and the thickness of the raised or recessed reinforcing region corresponds to the thickness (D) of the base body (10). An electrical feedthrough (1) according to any one of claims 1 to 5.

7. The electrical feedthrough (1) according to any one of claims 1 to 6, wherein the electrical feedthrough (1) is formed as a connection terminal for an E-compressor.

8. A method for manufacturing an electrical feedthrough (1) including a substrate (10) according to any one of claims 1 to 7, wherein the method is: The process involves forming a base body (10) from a blank having at least one opening (12), wherein the edges surrounding the opening (12) are formed sharply, and the edges of the outer contour of the base body (10) have a chamfered or rounded portion (18) with a radius r in the range of 0.3 mm to 2 mm. Insert the fixing material blank and the conductor (30) into at least one of the openings (12), The process involves performing a heat treatment to form a fixing material (20) from the aforementioned fixing material blank. Methods that include...

9. The method according to claim 8, wherein forming the opening (12) and providing a chamfered portion and / or a rounded portion (18) on the edge are performed in one common work step.

10. The substrate (10) is formed from a wire material (2), The wire material (2) is rolled to a predetermined cross-sectional shape in which the length of the longer side corresponds to the width B of the side (22) of the base body (10), and the length of the shorter side corresponds to the thickness D of the base body (10). Forming the substrate (10) includes separating the blank from the wire material (2), The length of the vertical side (24) of the blank corresponds to the length L of the vertical side (24) of the base (10). A rounded portion (28) with radius r is already provided on the edge of the wire material (2) before the blank is separated, and after separation, the rounded portion (18) forms along the edge of the vertical side (24) of the base body (10). The method according to claim 8 or 9.

11. The substrate (10) is electrochemically coated with nickel using a drum coating method before the heat treatment is performed. The method according to any one of claims 8 to 10.

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