Capacitor, in particular intermediate circuit capacitor, for the power electronics of a vehicle

Abstract

Capacitor (1, 1', 1''), in particular intermediate circuit capacitor, for power electronics of a vehicle, comprising a housing body (2, 2', 2''), wherein - the housing body (2, 2', 2'') comprises an alignment interface (3, 3') for aligning the housing body (2, 2', 2'') into a, in particular a single, predefined relative position to at least one third body by contact of an alignment structure (4) of the alignment interface (3, 3') to a third-body-side counter-alignment structure (5) and - the housing body (2, 2', 2'') comprises a fastening interface (6, 6') for force-fit and / or form-fit fastening of the housing body (2, 2', 2'') to at least one third body, wherein the alignment interface (3, 3') and the fastening interface (6, 6') are formed as an integral part of the housing body (2, 2', 2'').

Description

[0001] The invention relates to a capacitor, in particular an intermediate circuit capacitor, for the power electronics of a vehicle. Such capacitors are known from the prior art. For example, if necessary, a group of capacitors is arranged adjacent to one another, i.e., in a row, and mechanically fixed to a base body or to a mounting surface of the capacitors by means of a means spanning the group of capacitors. Furthermore, the contacts of the respective capacitors of this group are electrically connected.

[0002] The invention is based on the object of providing a capacitor, in particular an intermediate circuit capacitor, which is optimized, in particular, with regard to ease of assembly. In particular, the number of special components required for assembling an arrangement of at least two capacitors can be reduced.

[0003] The object is achieved by a capacitor, in particular an intermediate circuit capacitor, for the power electronics of a vehicle according to claim 1. The dependent claims relate to possible embodiments of the capacitor. The object is also achieved by an arrangement consisting of at least two of the capacitors described herein, according to claim 10. Furthermore, the object is achieved by a power converter according to claim 11, an electric axle drive according to claim 12, and a motor vehicle according to claim 13.

[0004] The invention relates to a capacitor, in particular an intermediate circuit capacitor, for the power electronics of a vehicle. Such a capacitor can also be referred to as a DC link in the power electronics of a vehicle. The capacitor can be used to avoid or cap voltage peaks. These voltage peaks can arise, for example, from the switching behavior of a power module or power electronics which converts or transforms direct current into alternating current. The capacitor can be of modular construction, i.e., depending on the requirement for a capacitor function of the power electronics comprising the capacitor, several capacitors with defined performance values ​​(e.g. capacitance values) are connected together. The individual capacitors can be electrically connected in parallel, e.g. via a power rail, also referred to as a busbar.The capacitor has a housing body which comprises an alignment interface for aligning the housing body in a, in particular single, predefined relative position to at least one third body by contact of the alignment interface, in particular an alignment structure of the alignment interface, with a counter-alignment structure on the third body side. For this purpose, the housing body can have a surface section which enables a defined, in particular a single defined, alignment of the housing body to a third body. The third body can, for example, be a housing body of another capacitor, in particular having an identical or similar housing body, and / or a mounting surface or a base body. Furthermore, the housing body has a fastening interface for the force-fitting and / or form-fitting fastening of the housing body to at least one third body.

[0005] The capacitor is characterized in that the alignment interface and the fastening interface are formed as an integral component of the housing body. A one-piece component can be understood as a component of the housing body that is made of the same material and / or is formed on a component of the housing body in a non-destructive manner. In this case, the alignment interface can be formed as a structure that is spatially separate from the fastening interface, i.e., formed in different regions of the housing body. Alternatively or additionally, the alignment interface and the fastening interface can be formed as a common structure, i.e., formed in the same region of the housing body. The housing body can, for example, be formed at least in sections, in particular completely, from a plastic.For example, the housing body is manufactured at least in sections, in particular completely, in a plastic injection molding process. The alignment interface and the fastening interface are designed as a one-piece component, i.e., for example, as a component made of the same material as at least one component of the housing body. The housing body encloses or protects capacitor components, i.e., for example, at least one electrode and / or a dielectric of the capacitor is surrounded by the housing body and / or shielded from external mechanical influences. The alignment interface and the fastening interface can, for example, be produced at least in sections, preferably predominantly, particularly preferably completely, during a primary forming manufacturing process (e.g., an injection molding process or a casting process) of the housing body and / or at least one component of the housing body.Thus, during a plastic injection molding process, the structure forming the alignment interface and the fastening interface can be co-injected, i.e., co-produced. Preferably, the structure forming the alignment interface and the fastening interface can be made of the same material as the housing body. Alternatively, the structure forming the alignment interface and the fastening interface can be made of a different material than the housing body. For this purpose, the housing body can be manufactured, for example, using a 2K injection molding process, wherein a first injection molding material component forms the housing body and a further injection molding material component forms the structure forming the alignment interface and / or the fastening interface.

[0006] It is possible for the housing body to have at least one connection highlight for connecting the housing body to a third object, which connection highlight comprises an alignment interface and a fastening interface. The connection highlight can be formed as a highlight from a higher-level or basic geometry of the capacitor body. Preferably, the housing body has at least two connection highlights, each of which comprises an alignment interface and a fastening interface. The at least two, in particular identically formed, connection highlights can be located in different regions of the housing body.

[0007] The housing body can, for example, have at least two connection protrusions, each comprising an alignment interface and a fastening interface. Thus, each of the at least two connection protrusions can enable both an alignment function via its respective alignment interface and a fastening function via its respective fastening interface. Thus, each connection protrusion can have a dual function (fastening and alignment).

[0008] The housing body can, for example, have a basic shape of a prism, in particular a prism with a base area of ​​a regular or irregular polygon, wherein at least one connecting protrusion is formed at at least one corner region of the prismatic basic shape. For example, the housing body has a cuboid basic shape, in particular the basic shape of a cube. The corner region can, for example, form the corner or edge of the housing body, so that a connecting protrusion, in particular an outwardly projecting connecting protrusion, can be formed at the corner or edge of the housing body.

[0009] The housing body can, for example, comprise at least one first connection protrusion configured as an engagement protrusion with an engagement portion, and at least one second connection protrusion configured as a receiving protrusion with a receiving portion corresponding to the engagement portion. In other words, at least one connection protrusion can have an engagement portion that, in particular, has a shape corresponding to a receiving portion of a third object. Furthermore, at least one connection protrusion can comprise a receiving portion that corresponds to an engagement portion of a third object.In particular, it can be provided that a housing body has at least one first connection protrusion, which has an engagement portion, and at least one second connection protrusion, which has a receiving portion, wherein the receiving portion of the second connection protrusion corresponds to the engagement portion of the first connection protrusion. This makes it possible to achieve this when two capacitors are present that are similar or identical in terms of the connection protrusions, the receiving portion of a first capacitor on the connection protrusion side corresponds to the engagement portion of the other capacitor on the connection protrusion side.

[0010] Consequently, by interlocking the engagement and receiving sections of two capacitors, their targeted alignment or centering in a target alignment with each other can be enabled.

[0011] It is possible for a first engagement highlight to be formed at a first corner region and a further engagement highlight to be formed at a corner region opposite the first corner region, in particular diagonally. If the housing body has a base area of ​​a quadrilateral, a first engagement highlight can be formed at a first corner region and a further engagement highlight can be formed not at the corner region adjacent to the first corner region, but at the corner region following the adjacent corner region. An opposite corner region can, for example, mean a corner region which, e.g. in the case of a square basic shape, can be imaged onto the opposite corner region via a point reflection and / or via a mirror axis. In general, the opposite corner region can refer to the diagonally opposite corner region, in particular in the case of a quadrilateral.

[0012] Preferably, a first receiving protrusion can be formed in a second corner region and a further receiving protrusion can be formed in a corner region lying opposite the second corner region, in particular diagonally opposite. In the case of a housing body having a quadrangular basic shape, it can be provided that a first receiving protrusion is formed in a second corner region and a further receiving protrusion is not placed in a corner region adjacent to the second corner region, but rather is placed in a corner region following the adjacent corner region. If the corner regions of a housing body having a quadrangular basic shape are numbered from one to four, then, for example, an engagement protrusion can be provided in the first and third corner regions and a receiving protrusion in the second and fourth corner regions.

[0013] Alternatively or additionally, it can be provided that, on a housing body having a quadrangular basic shape, the corner regions of which are numbered from one to four, an engagement protrusion is arranged or formed at a first and a second corner region and a receiving protrusion is arranged or formed at a third and a fourth corner region. In this case, only a single alignment of two capacitors configured in this way is achieved when these capacitors are connected via an engagement of the engagement protrusions of a first capacitor with the receiving protrusions of another capacitor configured similarly or identically to the first capacitor.

[0014] The fastening interface, preferably the at least one connection protrusion, particularly preferably all connection protrusions of the housing body having an alignment and / or fastening interface, can, for example, have a through-hole for at least partially inserting a fastening means. A screw or rivet, for example, can be passed through the through-hole of the fastening interface, thus creating a force-locking connection between the capacitor and a third object serving as an abutment for the screw or rivet. For example, the through-hole of the fastening interface is sized to accommodate a metric screw.

[0015] The at least one through-hole of a connection protrusion of the housing body and at least one alignment interface of the same connection protrusion of the housing body can, for example, be aligned parallel to one another; preferably, they can be aligned coaxially to one another. Thus, for example, a central axis of a rectilinear through-hole of a connection protrusion can be aligned parallel and / or coaxially to an axis of symmetry and / or to an axis of rotation of a geometry of the connection protrusion forming the alignment interface. In other words, the alignment structure can have a rotationally symmetrical geometric shape, wherein its axis of rotation can be formed parallel and / or coaxially to the central axis of the through-hole.

[0016] Alternatively or additionally, it can be provided that a joining direction for engaging an engagement portion of a first capacitor with a receiving portion of a further capacitor corresponding to the engagement portion of the first capacitor is aligned parallel to a central longitudinal axis of a through-hole of a connection protrusion of the first capacitor and / or of the further capacitor.

[0017] It may prove advantageous if, in the final assembly state, a through-hole of a connection protrusion of a first capacitor and the through-hole of a connection protrusion of another capacitor together form a, in particular straight, connection channel for at least partially passing through a, in particular straight, fastening means (e.g., a screw). For this purpose, the through-holes of the two capacitors can be aligned coaxially with each other.

[0018] In addition to the capacitor, the invention relates to an arrangement comprising at least two capacitors described herein, wherein the at least two capacitors are connectable or connectable to one another via their fastening and / or alignment interfaces. By means of contact between a first alignment interface of the first capacitor and an alignment interface of the at least one second capacitor, a relative alignment of the two capacitors, in particular a single relative alignment, can be achieved. For this purpose, an engagement means of the first capacitor can engage in a receiving means of the further capacitor and, in the manner of a positive guide, execute a defined alignment of the two capacitors relative to one another into a target alignment.It can also be provided to arrange and fasten three or more capacitors which have similar or identical interfaces on their housing bodies, in particular have identical housing bodies, in a row.

[0019] The invention also relates to a power converter, in particular an inverter, for a motor vehicle with a capacitor. The power converter is characterized in that the capacitor is designed as described.

[0020] The invention also relates to an electric axle drive for a motor vehicle comprising at least one electric motor, a transmission device, and an inverter. The electric axle drive is characterized in that the converter is designed as described. The transmission device can, for example, comprise a gear for reducing the speed of the electric motor and a differential.

[0021] The invention also relates to a motor vehicle with an electric axle drive and / or a power converter and / or an arrangement of at least two capacitors. The motor vehicle is characterized in that the electric axle drive and / or the power converter and / or the arrangement of the at least two capacitors is designed as described.

[0022] All advantages, details, embodiments, and / or features of the capacitor according to the invention are applicable to the arrangement according to the invention, to the power converter according to the invention, to the axle drive according to the invention, and to the motor vehicle according to the invention, and vice versa. In particular, the statements regarding the capacitor and its housing body are also applicable to an arrangement or assembly consisting of at least two capacitors with similarly or identically designed housing bodies. The similarity or identity of the housing bodies can relate in particular to the geometric shape of connection highlights of the respective housing bodies.

[0023] The invention is explained in more detail using exemplary embodiments in the drawings. In the drawings: Fig. 1 a perspective schematic diagram of a capacitor according to an embodiment; Fig. 2 a schematic sectional view of a capacitor according to Fig. 1 from the side, with a cutting plane passing through the center of two through openings; Fig. 3 is a schematic sectional view of an arrangement of three capacitors and a base plate and fastening means, the sectional plane passing through the center of a row of fastening means; Fig. 4 a schematic sectional view of an arrangement of three capacitors as well as a base plate and fastening means, wherein the sectional plane runs through the center of two fastening means; Fig. 5 is a schematic plan view of a capacitor according to an embodiment; Fig. 6 a schematic plan view of a capacitor according to an embodiment.

[0024] The invention relates to at least one capacitor 1, 1', 1'', in particular at least one intermediate circuit capacitor, for the power electronics of a vehicle. The at least one capacitor 1, 1', 1'' comprises a housing body 2, 2', 2''. The housing body 2, 2', 2'' can, for example, have openings 15 through which electrical or electronic components inside the housing body 2, 2', 2'' can be passed via contacts (not shown). By means of these contacts, at least one electrical or electronic component inside the housing body 2, 2', 2'' can be connected to an electrical or electronic terminal. For example, a busbar can be attached to the contact.

[0025] The housing body 2, 2', 2'' comprises an alignment interface 3, 3' for aligning the housing body 2, 2', 2'' in a, in particular single, predefined relative position to at least one third body by contact of an alignment structure 4 of the alignment interface 3, 3' with a counter-alignment structure 5 on the third body side. Furthermore, the housing body 2, 2', 2'' comprises a fastening interface 6, 6' for non-positively and / or positively fastening the housing body 2, 2', 2'' to at least one third body. The third body can, for example, be a further housing body 2', 2'' that is similar or identical to the first housing body 2.

[0026] Alternatively, the third body can be a base body 14, in particular a flat base body, on which at least one capacitor 1, 1', 1'', in particular a plurality of capacitors 1, 1', 1'' are connected to one another.

[0027] The alignment interface 3, 3' and the fastening interface 6, 6' are designed as an integral component of the housing body 2, 2', 2'', ie, for example, the alignment interface 3, 3' and the fastening interface 6, 6' form a non-detachable and materially connected structure.

[0028] The housing body 2, 2', 2'' can, for example, have at least one connection protrusion 7, 7', 7'', 7''' for connecting the housing body 2, 2', 2'' to a third object, wherein the at least one connection protrusion 7, 7', 7'', 7''' comprises an alignment interface 3, 3' and a fastening interface 6, 6'. Preferably, the housing body 2, 2', 2'' has at least two connection protrusions 7, 7', 7'', 7''', each comprising an alignment interface 3, 3' and a fastening interface 6, 6'.

[0029] The housing body 2, 2', 2'' can be designed, for example, as shown in Fig. 1, have a basic shape of a prism, preferably a cuboid, wherein at least one connecting protrusion 7, 7', 7'', 7''' is formed on at least one corner region 8, 8', 8'', 8''' of the prismatic basic shape. In the Fig. In the embodiment shown in Figure 1, the housing body 2 has four corner regions 8, 8', 8'', 8''' or edges, e.g., edges running in the Y direction. Each of the four corner regions 8, 8', 8'', 8''' can be assigned an edge, wherein the edges can be aligned parallel to one another, for example. At least one connection highlight 7, 7', 7'', 7''' can be arranged on each of the four edges of the housing body 2.

[0030] It is possible for the housing body 2, 2', 2'' to comprise at least one first connecting protrusion 7, 7', 7'', 7''', designed as an engagement protrusion 9, 9', having an engagement portion 10, and at least one second connecting protrusion 7, 7', 7'', 7''', designed as a receiving protrusion 11, 11', having a receiving portion 12 corresponding to the engagement portion 10 or a receiving recess corresponding to the engagement portion 10. In other words, the receiving protrusion 11, 11' is designed as a protrusion from the basic shape of the housing body and has a receiving portion 12 designed as a receiving recess, which corresponds to an engagement structure of an engagement portion 10 of an engagement protrusion 9, 9'. In this case, the engagement highlight 9 can, for example, comprise a conical or pyramid-shaped engagement structure, cf. Fig. 2. The receiving protrusion 11 can, for example, have a receiving recess (receiving section 12) corresponding to the engagement structure, e.g. a recess whose inner walls are conical or pyramid-shaped, cf. Fig. 2.

[0031] The upper side 16 of a connection highlight 7, 7', 7'', 7''' can, for example, have a flat profile. Optionally, the upper side 16 of a connection highlight 7, 7', 7'', 7''' can have a profile oriented perpendicular to a central axis 17 of a through-hole 18, 18' of the connection highlight 7, 7', 7'', 7''' having the upper side 16. The flat upper side 16 can serve as a contact surface for an underside of a screw head of a screw received in the through-hole 18, 18', cf. Fig. 3 and Fig. 4.

[0032] A first engagement protrusion 9 can be formed, for example, on a first corner region 8 and a further engagement protrusion 9' on a corner region 8'' opposite the first corner region 8, more precisely on a corner region 8'' diagonally or diametrically opposite the first corner region 8, cf. Fig. 5. Alternatively or additionally, a first receiving highlight 11 can be formed at a second corner region 8' and a further receiving highlight 11' can be formed at a corner region 8''' opposite the second corner region 8', more precisely at a corner region 8''' diagonally or diametrically opposite the second corner region 8', cf. Fig. 5.

[0033] In the Fig. 5 and Fig. 6 shows a plan view of a housing body 2, in which the viewing plane can be parallel to a main extension plane of a base body 14, e.g. a circuit board, on which the housing bodies 2, 2', 2'' are to be fastened and aligned. Fig. The housing body 2 shown in Figure 5 has four possible fastening locations 17, 17', 17'', 17''' for fastening an identically designed housing body 2', 2''. In other words, a first capacitor 1 having a configuration of engagement and receiving protrusions 9, 9', 11, 11' can be mechanically fastened and aligned with another capacitor having a comparable or identical configuration of engagement and receiving protrusions 9, 9', 11, 11' at any of the four fastening locations 17, 17', 17'', 17''', if necessary by rotating the capacitor accordingly about the Y-axis.

[0034] In an alternative embodiment, an engagement protrusion 9, 9' is formed on each of two successive corner regions 8', 8'' of the housing body 2 and receiving protrusions 11, 11' are formed on two further, in particular successive, corner regions 8, 8''' of the housing body 2, cf. Fig. 6. Thus, an engagement section 10 is formed on a second corner region 8' and on a third corner region 8'' located on the same side of the housing 2, and receiving sections 12 are formed on the corner regions 8, 8''' opposite these two corner regions 8', 8'', which correspond to the engagement sections 10 of the corner regions 8', 8''. Fig. 6 shows a structure corresponding to that shown in the Fig. 1 and Fig. 2 shown capacitor 1 or its housing body 2.

[0035] The fastening interface 6, 6', preferably the at least one connection highlight 7, 7', 7'', 7''', particularly preferably all of the connection highlights 7, 7', 7'', 7''' of the housing body 2, 2', 2'' having an alignment and / or fastening interface 6, 6', can have or can have a through-hole 12, 12' for at least partially inserting a fastening means 13, 13', 13'', cf. Fig. 2 to 4.

[0036] A first engagement protrusion 9' of a second housing body 2' (of a second capacitor 1') can have a through-hole 18, and a receiving protrusion 11 of a first housing body 2 (of a first capacitor 1) can have a through-hole 18. In the assembled state of these two housing bodies 2, 2', the through-holes 18 can each form a component of a through-hole channel 20; for this purpose, the two through-holes 18 of the two assembled housing bodies 2, 2' can be aligned coaxially with one another. Preferably, a fastening means 13' can be guided at least partially through the through-hole channel 20, cf. Fig. 3.

[0037] The at least one through-hole 12, 12' of a connection protrusion 7, 7', 7'', 7''' of the housing body 2, 2', 2'' and at least one alignment interface 3, 3' of the same connection protrusion 7, 7', 7'', 7''' of the housing body 2, 2', 2'' can, for example, be aligned coaxially and / or parallel to one another. This enables a compact design of at least one capacitor 1, 1', 1'', which is configured to undergo a proper alignment and attachment to a third object. In particular, a connection highlight 7, 7', 7'', 7''' designed in this way, which integrally provides a fastening interface 6, 6' and an alignment interface 3, 3', can be used to achieve a compact arrangement and fastening of the capacitors 1, 1', 1'' in the case of fastening of at least two capacitors 1, 1', 1'' equipped with corresponding connection highlights 7, 7', 7'', 7'''.

[0038] The invention preferably comprises an arrangement comprising at least two capacitors 1, 1', 1'', in particular at least three capacitors 1, 1', 1'', wherein the at least two capacitors 1, 1', 1'', in particular the at least three capacitors 1, 1', 1'', are connected to one another via their fastening and / or alignment interfaces 3, 3', 6, 6', i.e. each is connected to at least one immediately adjacent capacitor 1, 1', 1''. For this purpose, there is direct contact between a first capacitor 1 and a second capacitor 1' adjacent to the first capacitor 1. Furthermore, the second capacitor 1' can be connected to a third capacitor 1'' adjacent to it. Accordingly, a first housing body 2 can each have at least two connection locations 19, 19' with connection highlights 7, 7', 7'', 7''', wherein at each of the two connection locations 19, 19', in particular precisely, a housing body 2', 2'' with a with respect.the alignment interface 3, 3' and / or fastening interface 6, 6', in particular with regard to the connection protrusions 7, 7', 7'', 7''', is alignable and / or fastenable to a structure similar or identical to the first housing body 2.

[0039] In the Fig. 3 shows an arrangement of three capacitors 1, 1', 1'. A first capacitor 1 is arranged on a second capacitor 1' and a third capacitor 1'' is arranged on the side of the second capacitor 1' opposite the first capacitor 1. All three capacitors 1, 1', 1'' are fixed to a base body 14 by means of at least three fastening means 13, 13', 13''. Examples of this are shown in Fig. 3 shows three screws which are screwed into holes provided with an internal thread in the base body 14.

[0040] It is in Fig. 3 that an engagement structure of the engagement portion 10 of an engagement protrusion 9 of the first housing body 2 engages into a corresponding receiving portion 12 of the base body 14. For this purpose, the base body itself can form a receiving portion 12, or a component connected to a receiving portion 12 is interposed, in particular fastened, between the engagement portion 10 of the housing body 2 and the base body 14. A through-hole 18 of the engagement portion 10 extends coaxially to the engagement structure of the engagement portion 10. The through-hole 18 of the engagement portion 10 also forms, with a through-hole in the receiving portion 12 of the base body 14, a through-hole channel 20 for receiving the fastening means 13, which is in particular designed as a screw.

[0041] Furthermore, Fig. 3 shows that a receiving section 12 of the receiving protrusion 11 of the first housing body 2 receives an engagement structure of an engagement section 10' of an engagement protrusion 9' of a second housing body 2' attached to the first housing body 2. The receiving section 12 of the first housing body 2 and the engagement section 10' of the second housing body 2' can each have a through-hole 18, wherein the two through-holes are aligned coaxially with one another and / or together form a through-channel 20 for receiving the second fastening means 13'. The fastening means 13' pushed through the through-channel 20 can be fixed to the base body 14, e.g., screwed in.The connection in the transition of the second and third housing body 2', 2'' can be made analogously to the connection of the first and second housing body 2, 2', so that a third fastening means 13 passes through a through-channel 20 formed by connecting protrusions of the second and third housing body 2', 2'' and is fixed to the base body 14.

[0042] Due to the fact that at each fastening means 13, 13', 13'' two housing bodies 2 are simultaneously fixed to each other and to the base body 14, in a series of several housing bodies 2, 2', 2'' fastened together, the use of all fastening options formed by the through-holes 18 for the fastening means 13, 13', 13'' may not be necessary, so that in the final assembly state of at least two capacitors 1, 1', preferably of at least three capacitors 1, 1', 1'', no fastening means is arranged in at least one through-hole 18 or in at least one formed through-hole channel 20. Fig.4 that sufficient fixation of the two or three housing bodies 2, 2', 2'' to the base body 14 is possible, even if no fastening means is accommodated in the through-channel 20 marked with the arrow 21 and formed by through-holes 18 of the connecting projections 7, 7', 7'', 7'''. For this purpose, the positive connection has a positive effect due to the interlocking of the engagement structure of the engagement section 10 of a housing body 2 in the recess of the receiving section 12 of the adjacent housing body 2'. Reference symbol 1, 1', 1'' capacitor 2, 2', 2'' housing body 3, 3' alignment interface 4 Alignment structure of 3, 3' 5 Counter-alignment structure of third body 6, 6' mounting interface 7, 7', 7'', 7''' Connection highlighting 8, 8', 8'', 8''' Corner area of ​​2, 2', 2'', 2''' 9, 9' Intervention highlight 10 intervention section 11, 11' Recording highlight 12 Recording section 13, 13', 13'' fasteners 14 basic bodies 15 Opening 16 Top of 7, 7', 7'', 7''' 17 Central axis of 18 18 Through-hole 19, 19', 19'', 19''' Mounting location 20 through-channel 21 Arrow

Claims

[1] Capacitor (1, 1', 1''), in particular intermediate circuit capacitor, for power electronics of a vehicle, comprising a housing body (2, 2', 2''), wherein - the housing body (2, 2', 2'') comprises an alignment interface (3, 3') for aligning the housing body (2, 2', 2'') in a, in particular single, predefined relative position to at least one third body by contact of an alignment structure (4) of the alignment interface (3, 3') with a third-body-side counter-alignment structure (5) and - the housing body (2, 2', 2'') comprises a fastening interface (6, 6') for force-fitting and / or form-fitting fastening of the housing body (2, 2', 2'') to at least one third body, characterized by that the alignment interface (3, 3') and the fastening interface (6, 6') are formed as an integral component of the housing body (2, 2', 2''). [2] Capacitor (1, 1', 1'') according to claim 1, characterized bythat the housing body (2, 2', 2'') has at least one connection protrusion (7, 7', 7'', 7''') for connecting the housing body (2, 2', 2'') to a third object, wherein the connection protrusion (7, 7', 7'', 7''') comprises an alignment interface (3, 3') and a fastening interface (6, 6'). [3] Capacitor (1, 1', 1'') according to claim 2, characterized by that the housing body (2, 2', 2'') has at least two connection protrusions (7, 7', 7'', 7'''), each comprising an alignment interface (3, 3') and a fastening interface (6, 6'). [4] Capacitor (1, 1', 1'') according to claim 2 or 3, characterized by that the housing body (2, 2', 2'') has a basic shape of a prism and at least one connecting protrusion (7, 7', 7'', 7''') is formed on at least one corner region (8, 8', 8'', 8''') of the prismatic basic shape. [5] Capacitor (1, 1', 1'') according to one of claims 2 to 4, characterized bythat the housing body (2, 2', 2'') comprises at least one first connection protrusion (7, 7', 7'', 7''') designed as an engagement protrusion (9, 9') with an engagement section (10) and at least one second connection protrusion (7, 7', 7'', 7''') designed as a receiving protrusion (11, 11') with a receiving section (12) corresponding to the engagement section (10). [6] Capacitor (1, 1', 1'') according to claim 5, characterized by that a first engagement protrusion (9) is formed on a first corner region (8) and a further engagement protrusion (9') is formed on a corner region (8'') opposite the first corner region (8). [7] Capacitor (1, 1', 1'') according to claim 5 or 6, characterized by that a first receiving highlight (11) is formed at a second corner region (8') and a further receiving highlight (11') is formed at a corner region (8''') opposite the second corner region (8'). [8] Capacitor (1, 1', 1'') according to one of the preceding claims, characterized by that the fastening interface (6, 6'), preferably the at least one connection protrusion (7, 7', 7'', 7'''), particularly preferably all of the connection protrusions (7, 7', 7'', 7''') of the housing body (2, 2', 2'') having an alignment and / or fastening interface (6, 6'), has or have a through-hole (12, 12') for at least partially inserting a fastening means (13, 13', 13''). [9] Capacitor (1, 1', 1'') according to claim 8, characterized by that the at least one through-hole (12, 12') of a connection protrusion (7, 7', 7'', 7''') of the housing body (2, 2', 2'') and at least one alignment interface (3, 3') of the same connection protrusion (7, 7', 7'', 7''') of the housing body (2, 2', 2'') are aligned coaxially with one another. [10] Arrangement comprising at least two capacitors (1, 1', 1'') according to one of the preceding claims, characterized by that the at least two capacitors (1, 1', 1'') are connected to one another via their fastening and / or alignment interface (3, 3'). [11] Power converter, in particular inverter, with at least one capacitor (1, 1', 1''), characterized by that the at least one capacitor (1, 1', 1'') is designed according to one of claims 1 to 9. [12] Electric axle drive for a motor vehicle with at least one electric machine, a transmission device and a power converter, characterized by that the power converter is designed according to claim 11. [13] Motor vehicle, comprising an electric axle drive according to claim 12 and / or a power converter according to claim 11 and / or an arrangement according to claim 10 and / or a capacitor (1, 1', 1'') according to one of claims 1 to 9.

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