Feed-through piece with connecting terminal and sheet metal shell and relay with feed-through piece

Abstract

The invention relates to a feed-through (10) having a connection terminal (22), in particular for a high-power relay (200), comprising a housing part (12) with a through-opening (14) and a connection terminal arrangement (20), which passes through the through-opening (14) and is sealed from the through-opening (14) by means of a fastening material (16), the feed-through (10) having a reinforcing component (18), the housing part (12) has a through-opening (14), a reinforcing member (18) which reinforces the housing part (12) in the region of the through-opening (14), and an insertion length (EL) of the fixing material (16) is greater than a thickness (d) of the housing part (12), the connection terminal arrangement (20) comprising a connection terminal (22) made of a first material and a tubular guide (26) made of a second material, the tubular guide (26) surrounding at least a portion of the connection terminal (22), the connection terminal (22) has a through-opening (14), and a fixing material (16) is arranged between an outer wall of the sleeve section (27) of the tubular guide (26) and an inner wall of the through-opening (14) in order to seal the connection terminal arrangement (20), a first gap (32) being present between the inner wall of the sleeve section (27) and the connection terminal (22), and wherein the connection terminal arrangement (20) further comprises a flexible element (28), the tubular guide (26) is connected to the connection terminal (22) via the flexible element. Other aspects of the invention relate to a housing and a relay, each having at least one such feedthrough.

Description

TECHNICAL FIELD

[0001] The invention relates to a feedthrough with a connection terminal, in particular for a high-power relay, comprising a housing part with a through-opening and a connection terminal arrangement which penetrates the through-opening and is sealed with respect to the through-opening by a fixing material. Other aspects of the invention relate to a housing and a relay each comprising at least one such feedthrough. BACKGROUND

[0002] In the prior art, some relays are known with which an electric current can be switched on and off. An example of this is a high-power relay which is used in an electric or hybrid vehicle in order to safely isolate a traction battery which supplies the vehicle with electrical energy from the electrical system of the vehicle. Such a relay comprises a housing, an electrical feedthrough for an electrical circuit to be switched on and a contact device for connecting or disconnecting two terminals for switching on the electrical current. The contact device can be actuated by an actuator, for example in the form of an electromagnet. The interior of the housing is usually sealed in order to prevent, on the one hand, the ingress of moisture and, on the other hand, to retain arc-extinguishing gas which can be present in the housing in the housing.

[0003] From EP 3 358 593 B1 a gas-tight connector is known which is particularly suitable for use in a high-power relay. The gas-tight connector comprises a metal container with a through-hole, a tubular guide which penetrates the through-hole, an insulating glass which gas-tightly seals the tubular guide and the metal container, and a connection base which penetrates the tubular guide and is gas-tightly fixed thereto. The connection base is made of a metal with low electrical resistance and is arranged in the connector in such a way that a gap exists between the inner circumferential surface of the section of the tubular guide which is in contact with the insulating glass and the outer circumferential surface of the corresponding section of the connection base. When the connection base thermally expands, the tubular guide deforms, thereby avoiding damage to the insulating glass.

[0004] From EP 4 002 415 A1 a gas-tight connection element and a contact device with such a connection element are known. The connection element has a container with through-openings, in each of which a tubular guide is inserted and with which a glass-metal feedthrough is constructed from insulating glass which is gas-tightly sealed with respect to the metal container. The tubular guide is connected to a connection base which is inserted into the tubular guide by means of a weakening. The weakening can be made of a different material than the rest of the tubular guide or is constructed as a thin section of the tubular guide.

[0005] In known feedthroughs, the flexibility required to compensate for thermal expansion of the connecting terminal is provided by a tubular guide, which for this purpose must have a minimum length or minimum height. The known feedthroughs therefore have a relatively large structural height. Furthermore, in order to implement a glass-metal feedthrough, the housing parts are required to be sufficiently stable and robust in order to provide a gas-tight and mechanically loadable embedding. In order to be able to make the housing as a whole more compact with such a feedthrough, it is an object of the present application to provide a feedthrough with a connecting terminal which has a smaller structural height and which is mechanically stable and sealing even in a thin-walled housing.

[0006] The known tubular guide must be elastic in order to be able to absorb length changes caused by thermal expansion of the connecting terminal. If a pressure embedding is required for a gas-tight seal, the known tubular guide is unable to exert the counterforce required for this. Furthermore, the housing material must also have a corresponding wall thickness in order to be able to exert sufficient pressure for the pressure embedding. One of the objects of the present application can therefore be seen as to provide a feedthrough which is suitable for a pressure embedding in the case of a thin-walled housing.

[0007] In the case of a threaded connection between the connecting terminal and the feed line, high torques can occur when the connection thread is tightened, which the known gas-tight connecting terminals are not able to withstand optimally. Another object of the present application can therefore be seen as to provide a feedthrough with a connecting terminal whose withstanding and transmission of torques exerted on the connecting terminal is improved. SUMMARY

[0008] Proposed is a feedthrough with a connection terminal, which is particularly suitable for high-power relays. The feedthrough comprises a housing part with a through-opening and a connection terminal arrangement which passes through the through-opening and is sealed against the through-opening with a fixing material. The feedthrough also has a reinforcing member which reinforces the housing part in the region of the through-opening, wherein the embedding length EL of the fixing material is greater than the thickness d of the housing part. The connection terminal arrangement comprises a connection terminal made of a first material and a tubular guide made of a second material, wherein the tubular guide surrounds at least a portion of the connection terminal and the fixing material for sealing the connection terminal arrangement is arranged between the outer wall of a sleeve section of the tubular guide and the inner wall of the through-opening, wherein there is a first gap between the inner wall of the sleeve section and the connection terminal. The fixing material thereby mechanically fixes the connection terminal arrangement in the through-opening and electrically isolates it from the housing part. Furthermore, it is also provided that the connection terminal arrangement comprises a flexible element, by means of which the tubular guide is connected to the connection terminal, wherein the flexible element surrounds a pin section of the connection terminal and there is a second gap between the pin section of the connection terminal and the flexible element. In a first variant i) the flexible element is integrally configured with the tubular guide as a section of the tubular guide with a reduced thickness. In a second variant ii) the flexible element is made of a third material. In a third variant iii) the flexible element is integrally configured with the connection terminal.

[0009] The connection terminal has a pin section which serves as a current conductor in the feedthrough, among other things. The pin section is preferably designed to be substantially cylindrical, in particular in the form of a cylinder, but other shapes are also conceivable. For example, a columnar shape with an elliptical, rectangular or square cross section is also conceivable. Furthermore, it is also conceivable for the pin section to be entirely or partially conical. The tubular guide with the sleeve section and the flexible element at least partially surround the pin section. Preferably, their cross-sectional shape is chosen to correspond to the cross-sectional shape of the pin section.

[0010] In a first variant of the invention, the flexibility of the tubular guide portion serving as a flexible element is increased by a reduced thickness. The reduction in thickness is made here in particular with respect to the sleeve section, such that the thickness, in particular the wall thickness, of the tubular guide in the region of the flexible element is less than in the region of the sleeve section.

[0011] In a second variant of the invention, the flexibility of the flexible element is increased by it being made of another material. The third material is preferably chosen here such that its modulus of elasticity is lower than that of the second material of the tubular guide. Thereby, the flexibility is increased even if the flexible element has the same wall thickness as the tubular guide in the sleeve region. Furthermore, it is of course also possible to choose the thickness or wall thickness of the flexible element to be less than that of the tubular guide in the sleeve region in order to further increase the flexibility.

[0012] In a third variant, the flexible element is made integrally with the connection terminal and thus from the same material as the connection terminal. The first material of the connection terminal generally has a lower modulus of elasticity than the second material of the tubular guide. The thickness or wall thickness of the flexible element can also be selected independently of the thickness of the sleeve section of the tubular guide, so that a flexible element having good elastic properties is obtained. Here, the thickness or wall thickness of the flexible element can in particular be selected to be less than the thickness of the tubular guide in the sleeve region.

[0013] All three variants allow the flexibility of the flexible element to be adjusted independently of the properties of the sleeve region of the tubular guide and allow the length of the flexible element to be reduced, and thus the structural height of the feedthrough, to be reduced, compared to feedthroughs known from the prior art. Here, the structural height is in particular understood to be the length by which the connection terminal arrangement protrudes from the housing part. Furthermore, the reinforcing member makes it possible for the proposed feedthrough to also be used with housing parts having a smaller thickness d and still to obtain a high mechanical stability and a safe and gas-tight feedthrough. This is particularly advantageous in housing parts which are designed as sheet metal parts.

[0014] The connection of the flexible element to the connection terminal or to the tubular guide is preferably carried out by means of welding or soldering.

[0015] The connection is preferably implemented to be gas-tight. Likewise, the sealing between the tubular guide and the inner wall of the through-opening is preferably also implemented to be gas-tight with the fixing material.

[0016] A gas-tight seal is in particular understood to be a helium leak rate of less than 1 · 10 -8 mbar · l / s -1 , preferably less than 1 · 10 -9 mbar · l / s -1 , at a pressure difference of 1 bar.

[0017] In order to obtain a sealed feedthrough, a sufficiently large embedding length EL is required. The embedding length is here the length along the longitudinal axis of the through- opening along which the fixing material is connected to and in contact with the reinforced housing part and, if necessary, the reinforcing member. Without further measures, the thickness d of the housing part would correspond to the embedding length EL.

[0018] In order to save material and thus weight and volume, it is desirable to select the thickness d of the housing part to be as small as possible. Furthermore, in the case of a small material thickness, the housing part can be implemented as a sheet metal part and easily shaped into the desired shape by means of a forming process such as deep drawing. The thickness d here in particular refers to the material thickness of the housing part when this is made as such a sheet metal part. If the housing part has a varying material thickness, the thickness d refers to the material thickness of the housing part in the region of the through-opening.

[0019] In order to extend the embedding length EL, the reinforcing member is preferably designed and arranged in such a way that it extends the inner wall of the through-opening and together with the housing part provides the embedding length EL. In this case, the wall of the reinforcing member meets and extends the inner wall of the through-opening, wherein the fixing material is in direct contact with the reinforcing member and is preferably ang lasen to the reinforcing member.

[0020] Alternatively, the housing part can be bent in the region of the through-opening to construct the inner wall of the through-opening over the entire embedding length, wherein the reinforcing member supports the bent section of the housing part. For this purpose, the material of the housing part, which is configured as a sheet metal part, for example, can be deformed and bent, for example, at an angle of approximately 90°. At this point, the fixing material is in direct contact with the housing part over the entire embedding length and does not contact the reinforcing member. The reinforcing member is preferably embodied to directly contact and support the bent section of the housing part.

[0021] The reinforcing member is preferably connected to the housing part by means of a joining method, such as soldering, welding or adhesion.

[0022] Preferably, the material thickness d of the housing part is in the range of 0.5 mm to 1 mm. The embedding length EL should be greater than the material thickness d of the housing part, preferably in the range of 1.5 mm to 3 mm, in order to achieve a gas-tight and mechanically loadable connection. The thickness D of the reinforcing member is therefore preferably selected in the range of 0.5 mm to 2.5 mm.

[0023] Preferably, the connection terminal has at least one collar. The collar is in particular configured as a region of the connection terminal in which the outer diameter of the connection terminal increases relative to the outer diameter in the pin section. Such a collar can have a constant diameter. However, it can also be provided that the diameter changes abruptly or continuously in one or more steps in the region of the collar.

[0024] The at least one collar is preferably arranged on the connection terminal and dimensioned in such a way that it is arranged outside the through-opening.

[0025] Preferably, the flexible element according to variant i) or ii) is connected to the side of the collar that faces the through-opening. In the case of the flexible element that is integral with the connection terminal according to variant iii), preferably, the section of the connection terminal that forms the flexible element begins at the side of the collar that faces the through-opening.

[0026] The outer diameter of the collar and the outer diameter of the flexible element can be selected to be the same, so that the flexible element is connected flush with the collar. Alternatively, the outer diameter of the flexible element can be selected to be smaller.

[0027] Instead of the flexible element being arranged on the surface of the collar facing the through-opening, it is preferably provided that the flexible element according to variant i) or ii) is connected to the side of the collar.

[0028] The connection terminal can comprise connection means on one or both end faces in order to simplify the connection of the electrical feed line. These connection means are designed, for example, as threaded holes which allow a screw connection to an electrical connection. Preferably, at least on the outwardly facing side of the feedthrough piece, such threaded holes are arranged.

[0029] Instead thereof, the connection means can also be designed, for example, as flat surfaces which are suitable for soldering or welding connections. In this case, it can be provided that the surfaces are coated and / or roughened in order to better adhere such a connection.

[0030] In order to simplify the connection to the connection terminal, in particular to the collar of the connection terminal, the tubular guide or the flexible element, if it is formed integrally with the tubular guide, can comprise a flange. For this purpose, it can be provided that the wall of the tubular guide is folded into a flange or that the end face of the tubular guide is enlarged by adjusting the outer diameter and / or the inner diameter.

[0031] By providing such a flange, the diameter at the connection can also be increased, whereby the torque acting on the connection terminal can be better transmitted to the connection without damage.

[0032] If the flexible element is not formed integrally with the tubular guide, it is preferably provided that the tubular guide has a continuous or stepwise diameter enlargement on the side facing the flexible element, outside the through-opening, and that the tubular guide is connected to the flexible element in the region with the enlarged diameter. Here, the resulting increased diameter can also improve the transmission of the torque acting on the connection terminal, so that, in particular when connecting the connection cable to the connection terminal by means of a screw, no damage to the feedthrough piece occurs.

[0033] Preferably, the flexible element is arranged and designed such that the second gap between the flexible element and the pin section is greater than or equal to the first gap between the sleeve section and the pin section. If, for example, the flexible element is formed by elongating the tubular guide with a reduced wall thickness, the inner diameter is preferably increased for the purpose of reducing the thickness and the outer diameter is kept constant.

[0034] In particular when the feedthrough piece is used for an electrical connection with a high voltage, in particular greater than 100 V and particularly preferably greater than 1000 V, it is preferably provided that the insulation path provided by the fixing material is extended by arranging additional insulating material. Thereby, in particular the occurrence of creepage currents and / or electrical breakdowns can be reduced, which would otherwise be possible in the presence of impurities and / or moisture, only the insulation path provided by the fixing material could be broken down.

[0035] To this end, the adjacent sections of the fixing material and the housing part are covered on the top side and / or the bottom side of the feedthrough with an insulating material, preferably.

[0036] The insulating material can be configured as an insulating disc made of an electrically insulating material. Alternatively or additionally, the insulating material can be configured as a coating made of an electrically insulating material, in particular with a casting compound.

[0037] As an embodiment of the insulating disc, the insulating material can in particular be selected from glass, glass-ceramic, ceramic or plastic, wherein plastic is preferred. The insulating material can also be identical to the fixing material.

[0038] Preferably, the feedthrough is configured as a press fit, wherein the housing part and / or the reinforcing member have a higher coefficient of thermal expansion than the fixing material. Preferably, the coefficients of thermal expansion of the reinforcing member and the housing part are matched to one another, but they can also be selected to be different. Here, the arrangement of the reinforcing member is particularly advantageous, because in order to form a press fit, pressure has to be transmitted onto the fixing material, which thin-walled housing part without reinforcement does not have sufficient mechanical strength. The fixing material, which is preferably glass, is then provided, for example in the form of a glass powder compact, and inserted into the through-opening of the housing part together with the connection terminal arrangement or at least together with the tubular guide. By heating this arrangement, the fixing material is obtained from the compact, which is embedded into the wall of the through-opening and the tubular guide. Upon cooling, the housing part and / or the reinforcing member shrink more than the fixing material due to the selected coefficients of thermal expansion, so that in the finished feedthrough the fixing material is subjected to a constant pressure by the housing part and / or the reinforcing member. Thereby, in particular a sealing with high quality and which remains durable even under difficult conditions such as frequent temperature changes and high mechanical requirements, in particular a gas-tight sealing, is achieved. The tubular guide is designed and embodied here such that the fixing material is supported from the inside in this press fit. To this end, the sleeve section has a thickness which, in combination with the material selection of the tubular guide, is selected such that the sleeve section can exert a sufficient counterforce.

[0039] In order to achieve a press fit, the material of the housing part or the reinforcing member and the fixing material are preferably selected such that the coefficient of thermal expansion α 壳体 of the housing part and / or the reinforcing member is at least 20% larger than the coefficient of thermal expansion α 玻璃 of the fixing material. For example, α 壳体 is selected in the range of 12 · 10 -6 1 / K to 19 · 10 -6 1 / K. If the coefficient of thermal expansion is referred to in the context of the present application, this means here the linear coefficient of thermal expansion α in the range of 20°C to 300°C. 玻璃 is selected in the range of 9 · 10 -6 1 / K to 11 · 10 -6 1 / K. If the coefficient of thermal expansion is referred to in the context of the present application, this means here the linear coefficient of thermal expansion α in the range of 20°C to 300°C.

[0040] As an alternative variant to the press-fitting, the coefficients of thermal expansion of the housing part, the reinforcing member, the fixing material and the tubular guide can also be selected in matching relation to one another, such that the coefficient of thermal expansion of the fixing material differs from the coefficient of thermal expansion of the housing part or the reinforcing member and / or the tubular guide by less than 20%, preferably less than 10% and particularly preferably less than 5%.

[0041] Preferably, the first material used for the connection terminal has a lower electrical resistance than the second material used for the tubular guide. Since the connection terminal serves as an electrical conductor in the feedthrough, it is preferred to use a material having as low an electrical resistance as possible. Thereby, it is achieved, inter alia, that the feedthrough does not overheat even at high currents.

[0042] Preferably, the first material has a smaller modulus of elasticity than the second material, particularly in the variant of the feedthrough in which the flexible element is formed integrally with the connection terminal. Thereby, elastic deformation of the flexible element can be achieved even at a larger material thickness.

[0043] If the flexible element is made of a third material and thus exists as a separate component, the third material used for the flexible element according to variant ii) preferably has a smaller modulus of elasticity than the second material of the tubular guide. Furthermore, preferably, the third material also has a smaller modulus of elasticity than the first material of the connection terminal.

[0044] Preferably, the first material of the connection terminal is selected from non-ferrous metals, such as copper or non-ferrous metal alloys, such as copper alloys, in particular brass, aluminum or aluminum alloys.

[0045] Preferably, at least one of the end faces of the connection terminal facing inwards is coated with a contact material in order to reduce the contact resistance and / or to reduce the formation of sparks. Alternatively, both end faces can also be coated with such a contact material. The contact material is characterized by a good resistance to oxidation and also by a resistance to wear caused by sparks and arcs produced during switching operations.

[0046] Suitable contact materials include, inter alia, silver, gold and platinum. Suitable alloys as contact materials include, inter alia, silver-nickel and silver-zinc oxide.

[0047] The tubular guide is made of a second material. Preferably, the second material is selected from steel, in particular ferritic steel, steel alloys, in particular nickel steel alloys and chromium steel.

[0048] The housing part is preferably made of metal, wherein the materials described with reference to the tubular guide are in principle also suitable as materials for the housing part. Furthermore, other steels, in particular austenitic steels, are also suitable. Preferred are materials having a coefficient of thermal expansion greater than the coefficient of thermal expansion of the fixing material used.

[0049] The second material can also be a composite material, which is built up from a plurality of layers, especially in the case of a tubular guide. However, the selection of a composite material is also conceivable in principle for the individual flexible element or for the connecting pin.

[0050] If an individual flexible element is used, the third material is preferably selected from non-ferrous metals or non-ferrous metal alloys. Examples of suitable materials include copper, copper alloys, especially brass.

[0051] The tubular guide can be designed as a solid component or can be implemented as a folded sheet metal part. For example, the tubular guide is designed as a sheet metal part, wherein the thickness relative to the section designed as a flexible element is increased in the sleeve section by one or more folds of the sheet metal part.

[0052] Preferably, the sheet metal part is a single-sided coated sheet metal part, wherein the sheet metal part is folded and arranged such that the coated side of the sheet metal part points in the direction of the connection to the flexible element or to the connecting terminal, while the uncoated side of the sheet metal part is directed towards the fixing material.

[0053] For the coating of the sheet metal part, it can be especially a nickel layer or another layer which facilitates the connection, especially by means of a soldering process. This is especially advantageous when the sheet metal part is made of steel.

[0054] The coated sheet metal part is preferably always folded and arranged such that the coating does not come into contact with the fixing material. Thus, in the region of the sleeve section, the coated side is preferably always on the inside and is not adjacent to the fixing material. If the tubular guide is designed with a flange, in the region of this flange the coating is preferably directed in the direction of the connecting partner. Thereby it can be achieved that the tubular guide has a surface which facilitates the welding and / or soldering connection, even if this surface has a poor binding property to the fixing material. By means of the corresponding folding of the sheet metal part, always the surface which is best suited for the connection to the respective connecting partner is adjacent to this connecting partner.

[0055] The tubular guide designed as a solid component can also be partially coated in order to simplify the connection to the flexible element and / or to the connecting terminal, especially in a soldering process. Here too, especially a nickel layer can be used. The coating is here preferably only applied selectively on the surface facing the connecting partner. Especially, the surface directed towards the fixing material preferably remains uncoated.

[0056] By means of the fixing material, the arrangement of the connecting terminal is both mechanically held and electrically isolated relative to the housing component. Preferably, the fixing material is selected from glass, glass-ceramic or ceramic.

[0057] It is particularly preferred that glass is used as fixing material, wherein the glass is selected from borosilicate glass, soda-lime glass, alkali glass, silicate glass or soda-lime glass. Of these, borosilicate glass and soda-lime glass are particularly suitable for a matching glazing, while alkali glass, silicate glass and soda-lime glass are particularly suitable for a press-in glazing.

[0058] One example for the selection of the feedthrough material is: copper as the first material of the connection terminal and ferritic steel as the second material of the tubular guide. As the fixing material, for example, soda-lime glass can be used.

[0059] Copper has here an elastic modulus of about 110 GPa, which is lower than the about 200 GPa of the ferritic steel of the tubular guide. Thus, the elastic element formed by the copper material of the connection pin can be elastically deformed under a smaller force, even with the same elastic element geometry, and thus absorb the shape change caused by the thermal expansion of the connection pin without transferring a harmful force to the fixing material. While the elasticity of the tubular guide made of ferritic steel is maintained, the dimensions of the elastic element made of copper can be correspondingly reduced, thus making the feedthrough more compact.

[0060] The connection terminal arrangement can additionally comprise an additional flexible element connected to the tubular guide, wherein the flexible element and the additional flexible element are connected to the connection terminal on opposite sides with respect to the through-opening or transition into the connection terminal in a one-piece structure.

[0061] The additional flexible element is also preferably designed essentially sleeve-like and preferably at least partially surrounds the pin section of the connection terminal. One flexible element can be oriented towards the top side and the other flexible element can be oriented towards the bottom side with respect to the through-opening in the housing part, so that the connection terminal can be held from both sides of the housing part.

[0062] The described feedthrough is particularly suitable for safely feeding large currents in the range of several amperes, in particular more than 10 amperes, and particularly preferably more than 100 amperes, through an airtight closed housing.

[0063] A further aspect of the present application is to provide a housing comprising at least one feedthrough described herein. The housing can be, for example, a housing of an electrical safety device, a housing of a control device such as a relay or a housing of a battery module.

[0064] The housing preferably comprises a deep-drawn part formed from sheet metal blank, which is part of the feedthrough described herein. The housing part is preferably configured here pot- or cup-like, with a bottom and a side wall. The through-opening for forming one or more feedthroughs is preferably arranged here in the bottom. Thus, a cup-like housing part is also preferably used in the feedthrough described herein. Instead, the housing part can also be configured essentially flat, for example as a cover part for another cup-like housing part.

[0065] The reinforcing member is preferably configured ring-shaped in order to lengthen and / or support the through-opening of the housing part.

[0066] In another aspect of the application, a relay is proposed, which comprises a housing with at least two feedthroughs as described herein, and a contact device for establishing an electrical connection between the connection terminals of the two feedthroughs.

[0067] The contact device here can comprise, inter alia, an actuator, which can be controlled by an electrical signal, such that the current flow between the two connection terminals is controlled in accordance with such a control signal. One example of such an actuator is an electromechanical actuator with an electromagnet and a movable armature. Additionally or alternatively, the contact device can comprise a pyrotechnic actuator, in which an explosive charge can be ignited by an electrical signal, which causes the electrical connection between the two connection terminals to be rapidly broken. In order to transmit the electrical signal, the housing can have an additional electrical feedthrough.

[0068] The housing of the relay is preferably hermetically sealed, such that the interior of the housing is protected from the environment on the one hand and nothing can escape from the interior of the housing to the outside on the other hand. Thereby, the interior of the housing or at least the area around the contact device can be filled with a so-called arc-extinguishing gas. The task of such an arc-extinguishing gas is to extinguish an arc that can occur when breaking the electrical contact to the connection terminals as quickly as possible. BRIEF DESCRIPTION OF DRAWINGS

[0069] The application will be described in more detail hereinafter, without limitation, with reference to the drawings.

[0070] The figures show: Figure 1 a side view of a first embodiment of a feedthrough, Figure 2 a side view of a second embodiment of a feedthrough, Figure 3 a side view of a third embodiment of a feedthrough, Figure 4 a side view of a fourth embodiment of a feedthrough, Figure 5 a side view of a fifth embodiment of a feedthrough, Figure 6 a side view of a sixth embodiment of a feedthrough, Figure 7 a side view of a seventh embodiment of a feedthrough, and Figure 8 a side view of an embodiment of a relay with two feedthroughs according to the sixth embodiment of the application. DETAILED DESCRIPTION

[0071] Figure 1A first embodiment of a feedthrough 10 with a connection terminal 22 is shown. The feedthrough 10 comprises a thin-walled housing part 12 with a through-opening 14, which has a material thickness or thickness d around the through-opening 14. The material of the housing part 12 is bent by 90° at the through-opening 14. The bent section of the housing part 12 is reinforced and supported by a reinforcing member 18. A connection terminal arrangement 20 passes through the through-opening 14 and is held therein by a fixing material 16. The fixing material 16 hermetically seals the connection terminal arrangement 20 with respect to the wall of the through-opening 14, so that the through-opening 14 is hermetically closed. By bending the material of the housing part 12, an embedding length EL is provided for the fixing material 16, which is significantly greater than the thickness d of the housing part 12.

[0072] The connection terminal arrangement 20 comprises a connection terminal 22 and a tubular guide 26. The longitudinal axis of the connection terminal 22 extends coaxially with the longitudinal axis of the tubular guide 26 in the shown embodiment, wherein the tubular guide 26 surrounds a portion of the connection terminal 22. The fixing material 16 for sealing the connection terminal arrangement 20 is arranged between the outer wall of a sleeve section 27 of the tubular guide 26 and the inner wall of the through-opening 14, wherein a first gap 32 exists between the inner wall of the sleeve section 27 and the connection terminal 22. From Figure 1 It can be seen from the illustration that the sleeve section 27 is thus the portion of the tubular guide 26 that directly adjoins the fixing material 16 and is arranged within the through-opening 14.

[0073] In the first embodiment of the Figure 1 The tubular guide 26 has a section with reduced thickness, which serves as a flexible element 28. In the section with reduced thickness, the outer diameter of the tubular guide 26 remains unchanged, only the inner diameter is increased to reduce the thickness, so that the wall thickness of the tubular guide 26 and thus its thickness is reduced in this section. Thereby, a second gap 34 is formed between the flexible element 28 and the pin section of the connection terminal 22 of the cylindrical design, which is larger than the first gap 32. Furthermore, by the reduced thickness, the flexibility of the tubular guide 26 is increased, so that the flexible element 28 formed can be made relatively short compared to known feedthroughs with a tubular guide, but still compensates for changes in the size of the connection terminal 22 caused by temperature fluctuations by elastic deformation.

[0074] At the upper end, the connection terminal 22 has a collar 24, which is arranged in the through-opening 14 and is held by the fixing material 16. The collar 24 is arranged in the through-opening 14 in such a way that the fixing material 16 is arranged between the collar 24 and the inner wall of the through-opening 14. The collar 24 is thus arranged in the through-opening 14 in such a way that the fixing material 16 is arranged between the collar 24 and the inner wall of the through-opening 14. Figure 1In the exemplary embodiment, the connection terminal 22 is configured as two steps, with the diameter of the cylindrical connection terminal 22 increasing at each step. Furthermore, the connection terminal 22 has a threaded hole 23 on its top side. This threaded hole 23 is used, in particular, to establish a connection to an electrical feeder (not shown), wherein the feeder is screwed to the connection terminal 22. In other embodiments, other connecting elements may be provided in place of the threaded hole 23, or the connecting elements may be omitted, so that the connection terminal 22, for example, has a flat surface on its top side that can be connected to the electrical feeder, for example, by soldering or welding.

[0075] The flexible element 28 formed by the area of ​​reduced wall thickness of the tubular guide 26 is Figure 1 In the first embodiment shown, the side wall of the first step of the collar 24 of the connecting terminal 22 is connected. Therefore, the outer diameter of the first step of the collar 24 is smaller than the inner diameter of the fixing material 16. In addition, in the example shown, the outer diameter of the second, larger step of the collar is smaller than the inner diameter of the through-opening 14. In other embodiments, this diameter can also be selected to be larger than the diameter of the through-opening 14. In the example shown, the connection is made by a solder connection 30, but other connection methods, such as welding, can of course also be used. The connection between the flexible element 28 and the collar 24 is also made airtight, so that the feed-through 10 as a whole hermetically closes the through-opening 14 of the housing part 12.

[0076] The portion of flexible element 28 located between collar 24 and sleeve section 27 is configured and constructed to elastically deform when subjected to force, with first gap 32 and second gap 34 providing the necessary space for this. In this way, forces resulting from thermal expansion of connection terminal 22 can be absorbed by the elastic shape change of flexible element 28, particularly without generating harmful forces on securing material 16. This thermal expansion can occur when connection terminal 22 is subjected to high currents and heats up due to the existing electrical resistance.

[0077] Advantageously, the wall thickness of the tubular guide 26 is not reduced in the sleeve section 27. Therefore, the tubular guide 26, the fixing material 16, and the housing part 12 can be press-fitted together, with the thermal expansion coefficients of the housing part 12 and the reinforcing member 18 being selected to be greater than the thermal expansion coefficient of the fixing material 16. Consequently, after the fixing material 16 is fitted, the housing part 12 and the reinforcing member 18 contract more strongly than the fixing material 16, thereby exerting pressure on the fixing material 16. The thicker tubular guide 26 in the region of the sleeve section 27 provides the necessary counteracting force for this purpose, while the flexible element 28 has the necessary elasticity to absorb the thermal expansion of the connecting terminal 22.

[0078] Figure 1In the first embodiment, the connecting terminal 22 is made of a first material, and the tubular guide 26 is made of a second material. This allows for optimized selection of material properties for both parts of the connecting terminal arrangement 20. Thus, in particular, a material with a low electrical resistance can be selected for the connecting terminal 22, while a rigid material with a high elastic modulus can be selected for the tubular guide 26 and its sleeve section 27.

[0079] Figure 2 A second embodiment of the feed-through 10 is shown in FIG. Figure 1 Unlike the first embodiment shown, tubular guide 26 is designed in two parts, so that sleeve section 27 and flexible element 28 are composed of two parts and are connected to each other via a connection 30, which is designed as a soldered or welded connection, for example. This allows the portion of tubular guide 26 serving as flexible element 28 to be made of a third material, while only sleeve section 27 is made of the second material. The third material is preferably selected so that it has a lower modulus of elasticity than the second material and thus exhibits elastic deformation even under the action of relatively small forces.

[0080] and Figure 1 Unlike the first embodiment, the material of the housing part 12 is not bent in the region of the through-opening 14, so that the fixing material 16 directly contacts the reinforcing member 18. However, it is of course also possible in this embodiment to Figure 1 The material of the housing component 12 is bent as in FIG. 1 and the reinforcing member 18 is supported so that the fixing material 16 is connected to the inner wall of the through-opening 14 formed by the material of the housing component 12 over the entire insertion length EL.

[0081] Figure 3 A third embodiment for the feedthrough 10 is shown. Figure 1 As described, the feedthrough 10 has a housing part 12 with a through-opening 14, through which a connection arrangement 20 with connection terminals 22 and a tubular guide 26 is passed. The connection arrangement is held in the through-opening 14 by a fixing material 16 and hermetically sealed.

[0082] and Figure 1 and Figure 2 Similar to the first and second embodiments, the connecting terminal 22 has a collar 24 on one side, which is designed as a single stage and is arranged flush with the end face of the connecting terminal 22. A threaded hole 23 is again arranged in this end face, which allows a screw connection to an electrical feeder.

[0083] exist Figure 3In a third embodiment of the application, the tubular guide 26 is formed from a coated sheet metal part, which comprises a sheet metal 38 with a single-sided coating 39. The sheet metal part is designed to be substantially tubular and surrounds the cylindrical pin section of the connection terminal 22, wherein the longitudinal axis of the tubular guide 26 extends coaxially to the longitudinal axis of the connection terminal 22. The sheet metal part is configured to have a sleeve region 27 with a higher thickness at a first end and a flange at a second end. The sheet metal part is designed such that the coating 39 is directed inwardly towards the cylindrical pin section of the connection terminal 22, while the uncoated side of the sheet metal part is correspondingly directed outwardly. The sleeve region 27 is obtained by one or more foldings of the sheet metal part. Here, the sheet metal part is deformed such that the coating 39 of the sheet metal 38 is folded onto itself and thus located inside. As a result, the uncoated side of the sheet metal 38 is directed in the direction of the fixing material 16 in the sleeve region 27. The flange is also obtained by deforming the sheet metal part, wherein here the coating 39 of the sheet metal 38 is directed in the direction of the collar 24 of the connection terminal 22 and connected thereto by a connection 30, which is designed for example as a solder connection. In order to provide as large an area as possible for the connection 30 to the flange, the outer diameter of the collar is preferably chosen to be larger than the inner diameter of the fixing material 16, as shown. In Figure 3 In the embodiment shown, the diameter of the collar 24 is chosen to be smaller than the inner diameter of the through-opening 14. In order to further increase the flange connection area, the outer diameter of the collar 24 can also be chosen to be larger than the inner diameter of the through-opening 14.

[0084] Between the flange and the sleeve region 27, the sheet metal part is not folded and forms here a section with a smaller thickness than the sleeve region 27 and serves as a flexible element 28. As a result, the first gap 32 between the sleeve region 27 and the cylindrical pin section of the connection terminal 22 is smaller than the second gap 34 between the flexible element 28 and the cylindrical pin section of the connection terminal 22.

[0085] Figure 4 A fourth embodiment for a feedthrough 10 is shown. The feedthrough 10 again has a housing part 12 with a through-opening 14, through which a connection terminal arrangement 20 passes, which has a connection terminal 22 and a tubular guide 26. The connection terminal arrangement is held and hermetically sealed in the through-opening 14 by a fixing material 16.

[0086] Like the first and second embodiments, Figure 1 and Figure 2 The connection terminal 22 has a collar 24 on one side, which is also designed here in several stages, wherein starting from the bottom side opposite the top side with the threaded hole 23, the collar 24 has a first step and a second step, wherein the diameter of the first step is larger than the diameter of the second step. In other embodiments, the collar 24 can of course also be designed differently, for example with only one step arranged flush with the top side of the connection terminal 22.

[0087] On the bottom side of the collar 24, the tubular guide 26 is connected with the collar 24 by means of a connection 30, for example designed as a solder connection. The tubular guide 26 is here two-part, wherein the sleeve section 27 opposite the fixing material 16 is made of a second material, while the section serving as flexible element 28 is made of a third material having a smaller modulus of elasticity than the second material. The two parts of the tubular guide 26 are also connected in the example shown by means of a connection 30, for example designed as a solder connection. The tubular guide 26 is here arranged such that the flexible element 28 points towards the collar 24. The tubular guide 26 is designed overall substantially cylindrical and surrounds the cylindrical pin section of the connection terminal 22 such that the longitudinal axis of the tubular guide 26 extends coaxially with the longitudinal axis of the connection terminal 22. The dimensions of the collar 24 and the tubular guide 26 are here chosen such that the outer diameter of the tubular guide 26 corresponds to the larger diameter of the collar 24 and the two parts thus transition into one another without a step.

[0088] Figure 5 A fifth embodiment of the feedthrough 10 is shown, which is similar to the fourth embodiment of Figure 4 . Unlike the fourth embodiment, the diameter of the tubular guide 26 is smaller than the diameter of the collar 24. Furthermore, in order to increase the pressure resistance of the feedthrough 10, an additional insulating material 36 is provided, which is here designed as two insulating disks. The first insulating disk covers the top side of the fixing material 16 and the adjacent portion of the top side of the housing part 12. The second insulating disk covers the bottom side of the fixing material 16 and the adjacent portion of the bottom side of the housing part 12. By means of the arranged insulating material 36, the creepage distance between the connection terminal arrangement 20 and the housing part 12 is increased, in particular, and thus the pressure resistance of the feedthrough 10 is increased. Instead of insulating disks, the insulating material 36 can also be applied, for example, as an insulating coating. Furthermore, depending on the application, it can also be sufficient to arrange the insulating material 36 on only one side, for example the top side of the feedthrough 10.

[0089] Figure 6 A sixth embodiment for a feedthrough 10 is shown. The feedthrough 10 again has a housing part 12 with a through opening 14, through which a connection terminal arrangement 20 with a connection terminal 22 and a tubular guide 26 passes. The connection terminal arrangement 20 is held and hermetically sealed in the through opening 14 by a fixing material 16.

[0090] The connection terminal 22 here has a collar 24 flush with the top side with a threaded hole 23, to which on the bottom side of the collar 24 facing the through opening 14 a sleeve-like section of the connection terminal 22 serving as flexible element 28 is connected. The outer diameter of the section designed as a sleeve in this example corresponds to the outer diameter of the collar 24, but can also be chosen differently to be smaller. Furthermore, in Figure 6In the embodiment shown, the outer diameter of the collar 24 is greater than the inner diameter of the fixing material 16 and smaller than the inner diameter of the through-opening 14. The outer diameter of the collar 24 can alternatively also be selected to be greater than the inner diameter of the through-opening 14.

[0091] The sleeve-like section serves as the flexible element 28 and is connected to the tubular guide 26 by means of a connection 30, which is embodied, for example, as a soldered connection. The tubular guide 26 comprises a sleeve section 27, which adjoins the fixing material 16. There is a first gap 32 between the sleeve section 27, which surrounds the cylindrical pin section of the connection terminal 22, and the connection terminal 22. The sleeve section 27 is connected to the connection terminal 22 at the connection flange. Figure 6 In the embodiment shown, the sleeve section 27 is extended upwards and expands into a connection flange at the end facing the collar 24. At the connection flange, the tubular guide 26 is connected to the flexible element 28 of the connection terminal 22. The tubular guide 26 is made of a second material, which has a greater modulus of elasticity relative to the first material from which the connection terminal 22 is made. As a result, the forces that arise when the connection terminal 22 thermally expands are absorbed by the elastic deformation of the flexible element 28 of the connection terminal 22. Advantageously, the forces that arise as a result of thermal expansion are therefore not transmitted to the fixing material 16 by the tube sleeve 26 and its sleeve section 27, or at least to an extent that is harmless.

[0092] The sleeve-like section of the connection terminal 22, which serves as the flexible element 28, surrounds the cylindrical pin section of the connection terminal 22, wherein the longitudinal axis of the sleeve-like section is arranged concentrically to the longitudinal axis of the cylindrical pin section, and there is a second gap 34 between the inside of the sleeve-like section or the flexible element 28 formed thereby and the cylindrical pin section.

[0093] Figure 7 A seventh embodiment of the feedthrough 10 is shown, wherein the sleeve-like section of the connection terminal 22 is configured as the flexible element 28, similar to the sixth embodiment of the Figure 6

[0094] In contrast to the embodiment of the Figure 6 The section of the connection terminal 22, which serves as the flexible element 28, here has a smaller outer diameter than the collar 24, and the collar 24 is connected to the Figure 4 Figure 5 The embodiments of the connection terminal 22 and the tubular guide 26 are designed in a multi-stage manner, similar to the embodiments of the

[0095] Figure 8 ​​An example of a relay 200 is shown in FIG. , which is configured as a high-power relay for electric vehicles, for example. The relay 200 comprises a housing 100 with a cup-shaped housing part 12. The housing part 12 has a bottom 101 and side walls 102. The housing part 12 is joined to a cover 103 to form the housing 100. The housing part 12 comprises two electrical feedthroughs 10 arranged in the bottom 101, which have connection terminals 22 to which the circuit switched by the relay 200 can be connected. For example, an electrical connector can be screwed to the connection terminals 22 for this purpose. Figure 8 In the example shown, the feedthrough 10 is as shown in FIG. Figure 6 However, other feedthroughs 10 described here can of course also be used.

[0096] A contact device 110 is arranged inside the housing 100, which is configured to electrically connect the two connection terminals 22 in a first position so that current can flow, and to electrically disconnect the two connection terminals 22 in a second position so that no current flows. Figure 8 As shown in the figure, the connecting terminal 22 can have a contact coating 40 made of a contact material on its end face facing the contact device 110. This contact material, for example silver or a silver-copper or silver-nickel alloy, is oxidation-resistant and reduces the electrical contact resistance between the corresponding connecting terminal 22 and the contact device 110.

[0097] In order to transfer the contact device from one position to another, Figure 8 In the embodiment shown, an actuator 120 is provided which is designed as an electromagnetic actuator. In order to make electrical contact with the actuator 120, the housing 100 has an additional electrical feedthrough, which is provided at Figure 6 Not visible in the cross-section view.

[0098] For example, the contact device 110 can be placed in a first position by means of the electromagnet 122 of the actuator 120 when the electromagnet 122 is energized, so that current can flow between the two connecting terminals 22. If the energization of the electromagnet 122 is terminated, the contact device 110 can be placed in a second position by means of the spring 124, so that no current can flow between the two connecting terminals 22. In order to quickly extinguish an arc that may occur when disconnecting the contact device 110 from the connecting terminals 22, provision can be made for the interior of the housing 100 to be filled with so-called quenching gas. Since the feedthrough 10 according to the invention is hermetically sealed, the quenching gas cannot escape from the housing 100.

[0099] In the relay 200, provision may be made for an additional actuating device for moving the contact device 110 in addition to the actuator 120. For example, a pyrotechnic device may be provided (in the Figure 8The contact device 110 is moved from the first position to the second position by an actuator 120 (not shown) which is activated when the fuze is energized. The actuator 120 then moves the contact device 110 rapidly to the second position in which the connecting terminal 22 is electrically disconnected.

[0100] The claims are not limited to the embodiments described herein. In particular, various modifications can be made in which individual features of the embodiments described herein can be combined with one another.

[0101] List of reference signs 10 feedthrough 12 housing part 14 through opening 16 fixing material 18 reinforcing member 20 connecting terminal arrangement 22 connecting terminal 23 threaded hole 24 collar 26 tubular guide 27 sleeve section 28 flexible element 30 brazed joint 32 first gap 34 second gap 36 insulating material 38 sheet metal 39 coating 40 contact coating 100 housing 101 base 102 side wall 103 lid 110 contact device 120 actuator 122 electromagnet 124 spring 200 relay EL embedding length d housing part thickness D reinforcing member thickness

Claims

1. Feedthrough (10) with a connection terminal (22), in particular for a high-power relay (200), comprising: a housing part (12) with a through-opening (14) and a connection terminal arrangement (20) which penetrates the through-opening (14) and is sealed with respect to the through-opening (14) by a fixing material (16), wherein the feedthrough (10) has a reinforcing member (18) which reinforces the housing part (12) in the region of the through-opening (14) and an embedding length (EL) of the fixing material (16) is greater than a thickness (d) of the housing part (12), wherein the connection terminal arrangement (20) comprises a connection terminal (22) made of a first material and a tubular guide (26) made of a second material, wherein the tubular guide (26) surrounds at least a portion of the connection terminal (22) and the fixing material (16) is arranged between an outer wall of a sleeve section (27) of the tubular guide (26) and an inner wall of the through-opening (14) in order to seal the connection terminal arrangement (20), wherein a first gap (32) exists between an inner wall of the sleeve section (27) and the connection terminal (22), characterized in that the connection terminal arrangement (20) further comprises a flexible element (28) via which the tubular guide (26) is connected with the connection terminal (22), wherein the flexible element (28) surrounds a pin section of the connection terminal (22) and wherein a second gap (34) exists between the pin section of the connection terminal (22) and the flexible element (28), wherein i) the flexible element (28) is integrally configured with the tubular guide (26) as a section of the tubular guide (26) with a reduced thickness, or ii) the flexible element (28) is made of a third material, or iii) the flexible element (28) is integrally formed with the connection terminal (22).

2. Feedthrough (10) according to claim 1, characterized in that The reinforcing member (18) prolongs the inner wall of the through-opening (14) and provides the embedding length (EL) together with the housing part (12), or the housing part (12) is bent in the region of the through-opening (14) in order to form the inner wall of the through-opening (14) over the entire embedding length (EL), wherein the reinforcing member (16) supports the bent section of the housing part (12).

3. Feedthrough (10) according to claim 1 or 2, characterized in that The material thickness (d) of the housing part (12) is selected to be in the range of 0.5 mm to 1 mm, wherein preferably a thickness (D) of the reinforcing member (18) is selected such that the embedding length (EL) is in the range of 1.5 mm to 3 mm.

4. Feedthrough (10) according to any one of claims 1 to 3, characterized in that The connecting terminal (22) has a collar (24), and the flexible element (26) according to variant i) or ii) is connected to the side of the collar (24) facing the through opening (14), or in the case of the structure according to variant iii) integral with the tubular guide (26), the section of the connecting terminal (22) forming the flexible element (28) begins at the side of the collar (24) facing the through opening (14).

5. Feedthrough (10) according to any one of claims 1 to 3, characterized in that The connecting terminal (22) has a collar (24), and the flexible element (28) according to variant i) or ii) is connected to the side of the collar (24).

6. Feedthrough (10) according to claim 4 or 5, characterized in that The collar (24) is arranged outside the through opening (14).

7. Feedthrough (10) according to any one of claims 1 to 6, characterized in that The tubular guide (26) has a continuous or stepwise diameter increase in diameter on the side facing the flexible element (28) outside the through opening (14), and the tubular guide (26) is connected to the flexible element (28) in the region with the increased diameter.

8. Feedthrough (10) according to any one of claims 1 to 7, characterized in that The connecting terminal (22) has a threaded hole (23) on the outwardly facing side for securing a connecting line.

9. Feedthrough (10) according to any one of claims 1 to 8, characterized in that The adjacent sections of the fixing material (16) and the housing part (12) are covered on the top side and / or the bottom side of the feedthrough (10) with an insulating material (36), wherein the insulating material (36) is preferably configured as a disc made of electrically insulating material or as a coating made of electrically insulating material.

10. Feedthrough (10) according to any one of claims 1 to 9, characterized in that The feedthrough (10) is configured as a pressure-embedded, in which the coefficient of thermal expansion of the housing part (12) and / or the reinforcing member (18) is greater than the coefficient of thermal expansion of the fixing material (16).

11. Feedthrough (10) according to any one of claims 1 to 10, characterized in that The first material has a lower electrical resistance than the second material, and / or the first material has a smaller modulus of elasticity than the second material.

12. Feedthrough (10) according to any one of claims 1 to 11, characterized in that The third material according to variant ii) has a smaller modulus of elasticity than the second material, and preferably a smaller modulus of elasticity than the first material.

13. Feedthrough (10) according to any one of claims 1 to 12, characterized in that The first material is selected from non-ferrous metals, such as copper or copper alloys, in particular brass, aluminum or aluminum alloys.

14. Feedthrough (10) according to any one of claims 1 to 13, characterized in that The end face of the connecting terminal (22) is coated with a contact material for reducing the contact resistance and / or reducing the formation of sparks.

15. Feedthrough (10) according to any one of claims 1 to 14, characterized in that The tubular guide (26) is designed as a sheet metal part, wherein the thickness relative to the section designed as a flexible element (28) is increased in the sleeve section (27) by one or more folds of the sheet metal part.

16. Feedthrough (10) according to the preceding claim, wherein The sheet metal part is a single-sided coated sheet metal part, and the sheet metal part is folded and arranged such that the coated side of the sheet metal part points in the direction of the connection (30) of the flexible element (28) or the connecting terminal (22), and the uncoated side of the sheet metal part points towards the fixing material (16).

17. Feedthrough (10) according to any one of claims 1 to 16, characterized in that The second material is selected from steel, in particular ferritic steel, or steel alloys, in particular nickel steel alloys or chromium steels.

18. Feedthrough (10) according to any one of claims 1 to 17, characterized in that The fixing material (16) is selected from glass, glass-ceramics or ceramics.

19. Feedthrough (10) according to the preceding claim, characterized in that The glass is selected from borosilicate glass, soda-lime glass, alkali metal glass, silicate glass or soda-lime glass. The glass is selected from borosilicate glass, soda-lime glass, alkali metal glass, silicate glass or soda-lime glass.

20. Feedthrough (10) according to any one of the preceding claims, characterized in that The connection terminal arrangement (20) comprises an additional flexible element which is connected with the tubular guide (26), wherein the flexible element (28) and the additional flexible element are connected with the connection terminal (22) on opposite sides relative to the through-opening (14) or transition into the connection terminal in a one-piece structure.

21. Feedthrough (10) according to any one of the preceding claims, characterized in that The housing part (12) is a cup-shaped housing part (12) which has a bottom (101) and a side wall (102).

22. A housing (100) comprising at least one feedthrough (10) according to any one of claims 1 to 21.

23. A relay (200) comprising at least two feedthroughs (10) according to any one of claims 1 to 21 or a housing according to claim 22, and contact means (110) for establishing an electrical connection between the connection terminals (22) of the two feedthroughs (10).

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