Capacitor assembly, capacitor device, motor vehicle and method for manufacturing a capacitor assembly

Abstract

A capacitor assembly (100) for a capacitor device for a motor vehicle inverter comprises at least one capacitor (105), a housing (115), a first busbar (110), and a second busbar (120). The housing (115) is designed to accommodate the at least one capacitor (105). The first busbar (110) and the second busbar (120) are designed for electrical contacting the capacitor assembly (100). The capacitor (105) is electrically contacted, or can be contacted, between the first busbar (110) and the second busbar (120).

Description

[0001] The present invention relates to a capacitor device, a capacitor apparatus, a motor vehicle and a method for producing a capacitor device.

[0002] Capacitor devices are known in which the capacitor device and an intermediate circuit capacitor can be arranged in a common housing. The capacitor device can be connected to busbars inside the housing.

[0003] Against this background, the present invention provides an improved capacitor device, an improved capacitor apparatus, an improved motor vehicle, and an improved method for producing a capacitor device according to the main claims. Advantageous embodiments emerge from the subclaims and the following description.

[0004] The advantages achievable with the presented approach are, in particular, that a capacitor device is created that can be reliably, quickly and easily coupled to an adjacent DC link capacitor.

[0005] A capacitor device for a capacitor apparatus for a motor vehicle inverter comprises at least one capacitor, a housing, a first busbar, and a second busbar. The housing is designed to accommodate the at least one capacitor. The first busbar and the second busbar are designed to electrically contact the capacitor device. The capacitor is or can be electrically contacted between the first busbar and the second busbar.

[0006] The capacitor can be an electrical capacitor, which can be arranged, for example, in an intermediate circuit of an inverter. The inverter can be an electrical device that converts direct current into alternating current. The motor vehicle can, for example, be a motor vehicle with an electric drive. The second busbar can protrude at least partially from the housing. Furthermore, the first busbar and / or the second busbar can form a contact for a printed circuit board, thereby enabling direct contact with the printed circuit board.

[0007] The capacitor device can have a further capacitor that is arranged or can be arranged in the housing. In addition, the capacitor device can have a third busbar for electrically contacting the capacitor device. The further capacitor can be electrically contacted or contactable between the first busbar and the third busbar. The second busbar and the third busbar can be electrically insulated from one another or can be insulated. The third busbar can protrude at least partially from the housing. Furthermore, the third busbar can form a contact for a printed circuit board, thereby enabling direct contact to the printed circuit board.

[0008] The housing can form a screw boss, which can be connected or connectable to the first busbar via a connecting element. The screw boss can be designed as a ground connection. The connecting element can be a screw, which can be manufactured inexpensively and quickly. The first busbar can be reliably arranged within or on the housing and / or the capacitor and / or the additional capacitor.

[0009] The capacitor can be connected or connectable as a Y capacitor. The other capacitor can also be connected or connectable as a Y capacitor. Advantageously, the capacitors can be manufactured cost-effectively and in large quantities. The Y capacitors can divert high-frequency interference signals to ground. For example, one Y capacitor is connected between DC+ and ground and one between DC- and ground.

[0010] The capacitor device can have at least one coupling element, which can be arranged on the housing. The at least one coupling element can be shaped to couple the capacitor device to a negative coupling element of an adjacent intermediate circuit capacitor. Additionally or alternatively, the capacitor device can have at least one negative coupling element, which can be arranged on the housing. The at least one negative coupling element can be shaped to couple the capacitor device to a coupling element of the adjacent intermediate circuit capacitor. The coupling element can form a pin, a projection, or a protrusion, and additionally or alternatively a receiving opening or through-opening. This can advantageously enable easy handling. The coupling element and additionally or alternatively the negative coupling element can protrude at least partially from the housing.This advantageously enables a particularly stable coupling. If the coupling element is used to couple the capacitor device to a carrier element, for example, movement of the capacitor device relative to the coupling element in at least one direction of movement can be blocked. The capacitor device can have a plurality of coupling elements. For example, one coupling element can be used to couple the capacitor device to an adjacent intermediate circuit capacitor, and a further coupling element can be used to couple the capacitor device to a carrier element or to another intermediate circuit capacitor. It is also possible to use a plurality of coupling elements, for example two, to couple the capacitor device to the adjacent intermediate circuit capacitor. Several coupling elements of a capacitor device can be identical or at least partially differently shaped.A shape of the negative feedback element can be adapted to a shape of the coupling element. Corresponding to the coupling element, the capacitor device can have a plurality of identical or at least partially differently shaped negative feedback elements. A further negative feedback element of the capacitor device can be shaped to couple the capacitor device to a coupling element of a further intermediate circuit capacitor. The negative feedback element and the further negative feedback element can be arranged diagonally to one another on the housing of the capacitor device. The coupling element and a further coupling element can, for example, also be arranged diagonally to one another on the housing of the capacitor device.

[0011] The coupling element of the capacitor device can be arranged on a cover of the housing, and the counter-coupling element of the capacitor device can be arranged on a base of the housing opposite the cover. Adjacent to the counter-coupling element, the capacitor device can have a second counter-coupling element. This allows intermediate circuit capacitors to be coupled to the capacitor device, for example, by simply pushing them together. Additionally or alternatively, the coupling element can be shaped to couple the capacitor device to the adjacent intermediate circuit capacitor in a form-fitting or force-fitting manner. This advantageously enables space-saving and rapid assembly of the capacitor device. For this purpose, the coupling element can be shaped, for example, as a retaining bracket, a dovetail connection, a screw connection, or a frame.This advantageously allows for universally applicable mounting options. A further counter-coupling element can be arranged diagonally to the counter-coupling element and the second counter-coupling element on the housing cover.

[0012] A capacitor device comprises an embodiment of a capacitor device mentioned herein and an adjacent intermediate circuit capacitor. The capacitor device is coupled or can be coupled to the adjacent intermediate circuit capacitor. Advantageously, the capacitor device can be implemented without separate fixing components, thereby saving costs and time. The approach presented here can therefore also be understood as a mechanical concept for a modular Y-capacitor assembly. In other words, the Y-capacitor assembly can be integrated into the modular intermediate circuit capacitor as a modular design with an optimized electromagnetic compatibility (EMC) connection.

[0013] The intermediate circuit capacitor can be connected or connectable as an X-capacitor. Advantageously, the capacitor can be manufactured cost-effectively and in large quantities. An X-capacitor can be designed to block and attenuate interference signals on the power supply lines of devices. The X-capacitor can be an electrical capacitor that can be connected between the phase and neutral conductor or between two phases.

[0014] The capacitor device can comprise a plurality of intermediate circuit capacitors. The capacitor device can be coupled or can be coupled between the intermediate circuit capacitors and additionally or alternatively adjacent to a plurality of intermediate circuit capacitors. The intermediate circuit capacitors can, for example, be arranged in a row in any desired order. The capacitor device can be coupled in any desired arrangement to one of the intermediate circuit capacitors or to a plurality of intermediate circuit capacitors.

[0015] The capacitor device may comprise a further capacitor device. The at least one intermediate circuit capacitor may be coupled or capable of being coupled between the capacitor device and the further capacitor device. Multiple intermediate circuit capacitors may be coupled between or adjacent to the capacitor devices.

[0016] The capacitor device can advantageously be used in conjunction with a power converter.

[0017] In addition, the invention relates to an electric axle drive for a motor vehicle with at least one electric machine, a transmission device and an embodiment of a power converter described herein.

[0018] The power converter can be designed as an inverter. Using the power converter, the alternating electrical current required to operate the electric machine can be provided. Using the transmission device, a torque provided by the electric machine can be converted into a drive torque for driving at least one wheel of the motor vehicle. The transmission device can have a gearbox for reducing the speed of the electric machine and, optionally, a differential.

[0019] In addition, the invention relates to a motor vehicle with an embodiment of a power converter mentioned herein and additionally or alternatively with an embodiment of an electric axle drive mentioned herein.

[0020] A method for manufacturing an embodiment of a capacitor device mentioned herein comprises a step of providing the at least one capacitor, the housing, the first busbar, and the second busbar. Additionally, the method comprises a step of arranging the at least one capacitor in the housing. The method further comprises a step of attaching the first busbar and the second busbar to the at least one capacitor to produce the capacitor device. The advantages of the approach described herein can also be realized very efficiently by such an embodiment.

[0021] Also advantageous is a computer program product with program code that can be stored on a machine-readable medium such as a semiconductor memory, a hard disk memory or an optical memory and is used to carry out the method according to one of the embodiments described above when the program is executed on a computer or device.

[0022] The invention is explained in more detail by way of example with reference to the accompanying drawings. They show: Fig. 1 shows an embodiment of a capacitor device; Fig. 2 shows an illustration of an embodiment of a capacitor device; Fig. 3 shows an illustration of an embodiment of a capacitor device; Fig. 4 shows an illustration of an embodiment of a capacitor device; Fig. 5 shows an illustration of an embodiment of a capacitor device; Fig. 6 is a diagram of an embodiment of a capacitor device; Fig. 7 is a schematic representation of an embodiment of a capacitor device; Fig. 8 is a schematic representation of an embodiment of a capacitor device; Fig. 9 is a schematic representation of an embodiment of a capacitor device; Fig. 10 is a schematic representation of an embodiment of a capacitor device; Fig. 11 is a schematic representation of an embodiment of a capacitor device; Fig. 12 is a schematic representation of an embodiment of a capacitor device; Fig. 13 is a plan view of an embodiment of a capacitor device; Fig. 14 is a representation of an embodiment of a capacitor device; Fig. 15 is an exploded view of an embodiment of a capacitor device; Fig. 16 is a representation of an embodiment of a capacitor device; Fig. 17 is a schematic representation of an embodiment of a motor vehicle; and Fig. 18 a flowchart of an embodiment of a method for manufacturing a capacitor device.

[0023] In the following description of preferred embodiments of the present invention, the same or similar reference numerals are used for the elements shown in the various figures and having a similar effect, whereby a repeated description of these elements is omitted.

[0024] Fig. Figure 1 shows an illustration of an embodiment of a capacitor device 100, more specifically a structure of a YC holder. The capacitor device 100 is part of a capacitor device as described, for example, in Fig. 5. The capacitor device is for an inverter of a motor vehicle, as shown for example in Fig. 17 is shown.

[0025] The capacitor device 100 comprises at least one capacitor 105, a housing 115, a first busbar 110, and a second busbar 120. According to one embodiment, the capacitor device 100 additionally comprises a further capacitor 125 and a third busbar 130.

[0026] The housing 115 has a rectangular shape merely by way of example, wherein the capacitors 105, 125 are arranged along a longitudinal extent of the housing 115 within the housing 115. More precisely, the housing 115 forms, for example, two receiving areas 135, 145, wherein the capacitor 105 is arranged within the receiving area 135 and the further capacitor 125 is arranged in the further receiving area 145. The receiving areas 135, 145 are shaped parallel to one another along the longitudinal extent of the housing 115. The capacitors 105, 125 are shaped identically merely by way of example and have a rectangular shape. The receiving areas 135, 145 are also rectangular in order to receive the capacitors 105, 125 in a form-fitting manner. In this way, the capacitors 105, 125 are reliably arranged in the housing 115. The capacitors 105, 125 can also be called Y capacitors.

[0027] The busbars 110, 120, 130 are designed to electrically contact the capacitor device 100. For this purpose, the capacitor 105 is electrically contacted between the first busbar 110 and the second busbar 120. The further capacitor 125 is electrically contacted, for example, between the first busbar 110 and the third busbar 130. The busbars 110, 120, 130 are shaped, for example, as contact tongues. The first busbar 110 is shaped such that it contacts both capacitors 105, 125. More precisely, the first busbar 110 is rectangular, wherein the first busbar 110 forms a through-opening 140 that extends from a side wall of the first busbar 110. The through-opening 140 is designed, for example, to accommodate a connecting element, as is shown, for example, in Fig. 14. The through-hole 140 of the first busbar 110 can also be referred to as the busbar ground connection. The second busbar 120 and the third busbar 130 can each also be referred to as busbar + & -.

[0028] According to one embodiment, the capacitor device 100 has a coupling element 150 that is arranged on the housing 115. The coupling element 150 is, for example, shaped to couple the capacitor device 100 to a negative coupling element of an adjacent intermediate circuit capacitor, as is shown, for example, in the Fig. 5. The coupling element 150 is formed, for example, on a side of the housing 115 shaped as a cover 155, more precisely, centrally on an edge of the cover 155, for example as a pin.

[0029] In addition, the capacitor device 100 has a counter-coupling element 160, which is also arranged on the housing 115. The counter-coupling element 160 is shaped, for example, to couple the capacitor device 100 to a coupling element of the adjacent intermediate circuit capacitor. The counter-coupling element 160 is arranged, for example, on a bottom of the housing 115. According to one exemplary embodiment, the coupling element 150 and the counter-coupling element 160 are arranged on the same side of the housing 115. The counter-coupling element 160 is shaped as a web or retaining bracket that sits on the bottom of the housing 115 and has a projection that projects beyond an edge of the housing 115. According to one exemplary embodiment, the counter-coupling element 160 has a through-opening in the region of the projection, which has a diameter suitable for receiving a pin of the coupling element of the adjacent intermediate circuit capacitor.According to one embodiment, a thickness of the web corresponds to a length of the pin.

[0030] The coupling element 150 and / or the counter-coupling element 160 are shaped to couple the capacitor device in a form-fitting or force-fitting manner to the adjacent intermediate circuit capacitor.

[0031] According to one exemplary embodiment, the capacitor device 100 has a further negative coupling element 170, which is arranged adjacent to the negative coupling element 160 on the housing 115, more precisely on the bottom of the housing 115. The negative coupling elements 160, 170 are formed identically for illustrative purposes only. The further negative coupling element 170 is designed to couple the capacitor device 100 to a further coupling element of the adjacent intermediate circuit capacitor.

[0032] The capacitor device 100 is also designed to couple to a second intermediate circuit capacitor, as is shown for example in Fig. 5. For this purpose, the capacitor device 100 has, merely as an example, a third negative coupling element 180, which is arranged on the housing 115. The third negative coupling element 180 is arranged opposite the coupling element 150 on the cover 155 of the housing 115 and is designed to couple the capacitor device 100 to a third coupling element of the second intermediate circuit capacitor, see Fig. 5. The counter-coupling elements 160, 170, 180 can also be referred to as retaining brackets for fixing.

[0033] In other words, capacitors 105, 125 are used to divert high-frequency interference signals to ground. In the case of an inverter, these are caused by the switching of the power semiconductors during operation. For this reason, the effect of capacitors 105, 125 is greatest when they are placed as close as possible to the DC terminals of the power semiconductors. The approach presented here enables simple integration of capacitors 105, 125 into a capacitor device, such as those used in Fig. 5. Furthermore, a flexible design is possible, as the capacitors 105, 125 and / or the capacitor device 100 can be easily exchanged in terms of size and capacitance for EMC tests, for adaptation to a different application, or for design changes during a project. The capacitor device 100 can be easily integrated at various points in the capacitor device. Furthermore, a cost-effective and simple construction is possible. In addition, simple and flexible connection options are possible: for a ground connection, welding tabs, solder contacts, or screw contacts; for a DC connection, welding tabs, solder contacts, or screw contacts. Furthermore, an optimal connection of the capacitors 105, 125 with regard to electromagnetic compatibility (EMC for short) is possible, thereby reducing interference emissions.

[0034] Fig. 2 shows an illustration of an embodiment of a capacitor device 100. The capacitor device 100 is similar or corresponds to the capacitor device from Fig. 1, except that the capacitor device 100 is shown from a different perspective.

[0035] Fig. Figure 3 shows an illustration of an embodiment of a capacitor device 100. The capacitor device 100 is similar or corresponds to the capacitor device from one of the figures described above. More specifically, the capacitor device 100 is similar to the capacitor device from Fig. 1, except that the capacitor device 100 in Fig. 3 is shown rotated by 180 degrees.

[0036] Fig. 4 shows an illustration of an embodiment of a capacitor device 100. The capacitor device 100 is similar or corresponds to the capacitor device from one of the figures described above, with the exception that Fig. 4 shows a side view of the capacitor device 100.

[0037] The housing 115 is shown schematically, whereby, among other things, the capacitors 105, 125 are visible, wherein the housing 115 comprises, for example, a plastic material and can also be referred to as a plastic holder.

[0038] The housing 115 forms, for example, a screw dome 400. More precisely, the screw dome 400 is formed centrally on the bottom 455 of the housing 115 and is designed to be connected to the first busbar 110 via a connecting element which is Fig. 14 is shown.

[0039] According to the embodiment shown here, the housing 115 is divided into two sections 410, 412. The capacitors 105, 125 with the busbars 110, 120, 130 are arranged in the first section 410, and the screw boss 400 is formed in the second section 412.

[0040] According to one embodiment, the capacitor device 100 has a further coupling element 450, which is arranged opposite the counter-coupling element 160 on the bottom 455 of the housing 115 and is designed to couple the capacitor device 100 to a further counter-coupling element of the further adjacent intermediate circuit capacitor.

[0041] The coupling element 150 and the further coupling element 450 are arranged diagonally to each other and are identically shaped, for example only as pins, which can also be referred to as fixing pins. The counter-coupling elements 160, 180 are also arranged diagonally to each other and are identically shaped, for example only as retaining brackets for fixing.

[0042] Fig. 5 shows an illustration of an embodiment of a capacitor device 500, more specifically a top view of the capacitor device 500.

[0043] The capacitor device 500 comprises a capacitor device 100 and an adjacent intermediate circuit capacitor 510. The capacitor device 100 is similar to or corresponds to the capacitor device from one of the figures described above. According to one exemplary embodiment, the capacitor device 500 comprises a plurality of intermediate circuit capacitors, here merely by way of example four intermediate circuit capacitors 510, 520, 530, 540. According to one exemplary embodiment, the capacitor device 500 can comprise any number of intermediate circuit capacitors and capacitor devices.

[0044] The adjacent intermediate circuit capacitor 510 has a housing 515, a first busbar 511, and a second busbar 512. Additionally, the adjacent intermediate circuit capacitor 510 has a negative coupling element 518, which is arranged on the housing 515 and engages the coupling element 150 of the capacitor device 100.

[0045] The intermediate circuit capacitors 510, 520, 530, 540 are formed identically merely by way of example, so that each intermediate circuit capacitor 510, 520, 530, 540 has a housing 515, 525, 535, 545, as well as a first busbar 511, 521, 531, 541 and a second busbar 512, 522, 532, 542.

[0046] The capacitor device 100 is arranged, merely by way of example, between the adjacent intermediate circuit capacitor 510 and the second intermediate circuit capacitor 520. For this purpose, the second intermediate circuit capacitor 520 has, for example, a coupling element 526 arranged on the housing 525, and the third negative coupling element 180 of the capacitor device 100 engages the coupling element 526 of the second intermediate circuit capacitor 520. In this way, a positive and non-positive connection of the capacitor device 100 to the intermediate circuit capacitors 510, 520 is possible.

[0047] The second intermediate circuit capacitor 520 additionally has a negative coupling element 528, which is arranged on the housing 525 and engages with a coupling element 536 of the third intermediate circuit capacitor 530. The third intermediate circuit capacitor 530, in turn, has a negative coupling element 538, which is arranged on the housing 535 and is designed, for example, to engage with a coupling element of another intermediate circuit capacitor, which is not shown here. Alternatively, it is possible to guide a fastening element, for example a screw or a bolt, through a through-opening of the negative coupling element 538 in order to arrange the capacitor device 500, for example, on a vehicle component.

[0048] The fourth intermediate circuit capacitor 540 is arranged on the adjacent intermediate circuit capacitor 510 merely by way of example. For this purpose, a negative feedback element 548 of the fourth intermediate circuit capacitor 540 engages a coupling element 516 of the adjacent intermediate circuit capacitor 510. The fourth intermediate circuit capacitor 540 additionally has a coupling element 546, which is arranged on the housing 545 of the fourth intermediate circuit capacitor 540 and is designed, for example, to couple a negative feedback element of a further intermediate circuit capacitor, which is not shown here. In addition, the fourth intermediate circuit capacitor 540 has further negative feedback elements 558, 568, which are arranged on an underside of the housing 545. The further negative feedback elements 558, 568 are designed, for example, to engage coupling elements of the further intermediate circuit capacitor, which is not shown here.Alternatively, the further counter-coupling elements 558, 568 can be fastened to a support element by means of fastening elements, for example screws or bolts.

[0049] In other words, Fig. 5 shows a structure of the capacitor device 100, which can also be referred to as a YC holder, in a capacitor assembly. The capacitor device 100 can be connected to intermediate circuit capacitors 510, 520, 530, 540, which can also be referred to as discrete capacitors, via the coupling elements 150 and the counter-coupling elements 180, which can also be referred to as tabs, and thus fits into the assembly. The pins and tabs of the capacitor device have the same geometry.

[0050] Fig. 6 shows an illustration of an embodiment of a capacitor device 500, more precisely a side view of the capacitor device 500. The capacitor device 500 is similar or corresponds to the capacitor device of Fig. 5. The capacitor device 100 is arranged between the adjacent intermediate circuit capacitor 510 and the second intermediate circuit capacitor 520. The intermediate circuit capacitors 510, 520, 530, 540 each have further coupling elements 636 and further negative coupling elements 568, 618, 628, 638 on their side facing away from the busbars 512, 522, 532, 542. Each of the intermediate circuit capacitors 510, 520, 530, 540 has, for example, two further negative coupling elements on the underside, as is the case, for example, with the fourth intermediate circuit capacitor in Fig. 5. Due to the side view shown here, only one further negative feedback element 568, 618, 628, 638 is visible for each of the intermediate circuit capacitors 510, 520, 530, 540. In addition, each of the intermediate circuit capacitors 510, 520, 530, 540 has two further coupling elements opposite the respective further negative feedback elements 568, 618, 628, 638, which are designed to couple to the respective further negative feedback elements 170, 618, 628, 638. Due to the side view shown here, the further coupling elements, except for the further coupling element 636 of the third intermediate circuit capacitor 530, are in Fig. 6, since they are coupled to the additional negative feedback elements 170, 618, 628, 638. The capacitor device 100 also has additional coupling elements on the underside, which are not visible here, since the capacitor device 100 is coupled to the adjacent intermediate circuit capacitor 510 and the second intermediate circuit capacitor 520. Thus, a positive and non-positive coupling of the intermediate circuit capacitors 510, 520, 530, 540 to one another and / or to the capacitor device 100 is possible.

[0051] The coupling element of capacitor device 100 is coupled to the negative coupling element 518 of the adjacent intermediate circuit capacitor 510. Additionally, the further negative coupling element 170 of capacitor device 100 is coupled to a coupling element of the adjacent intermediate circuit capacitor 510. The third negative coupling element 180 of capacitor device 100 is coupled to the coupling element of the second intermediate circuit capacitor 520. Furthermore, a further coupling element of capacitor device 100 is coupled to a further negative coupling element 628 of the second intermediate circuit capacitor 520.

[0052] The third intermediate circuit capacitor 530 is coupled to a coupling element of the second intermediate circuit capacitor 520 by means of a further negative feedback element 638. The third intermediate circuit capacitor 530 additionally has a further coupling element 636, which is designed, for example, to couple to a further negative feedback element of a further intermediate circuit capacitor, which is not shown here.

[0053] The fourth intermediate circuit capacitor 540 is coupled to the further negative feedback element 568 of the adjacent intermediate circuit capacitor 510 by means of a further coupling element.

[0054] Fig. 7 shows a schematic representation of an embodiment of a capacitor device 500, more precisely a top view of the capacitor device 500. The capacitor device 500 is similar to the capacitor device of Fig. 5, except that Fig. 7 shows a schematic plan view of the capacitor device 500, in which the individual components are shown only by way of example using rectangles.

[0055] In other words, Fig. 7 shows an embodiment of an arrangement of the capacitor device 100 on the intermediate circuit capacitors 510, 520, 530, 540. The capacitor device 100 is arranged merely by way of example between two intermediate circuit capacitors, more precisely between the adjacent intermediate circuit capacitor 510 and the second intermediate circuit capacitor 520.

[0056] Depending on the available space and the number of intermediate circuit capacitors 510, 520, 530, and 540, which can also be referred to as winding elements, the capacitor device 100 can also be inserted in any other possible position. This makes the connection of the capacitor device 100 very flexible.

[0057] Fig. Figure 8 shows a schematic representation of an embodiment of a capacitor device 500. The capacitor device 500 is similar to the capacitor device of Fig. 7 except that the capacitor device 100 has a different arrangement.

[0058] According to the embodiment shown here, the capacitor device 100 is arranged between the adjacent intermediate circuit capacitor 510 and the fourth intermediate circuit capacitor 540.

[0059] Fig. 9 shows a schematic representation of an embodiment of a capacitor device 500. The capacitor device 500 is similar to the capacitor device of Fig. 7 and / or Fig. 8, except that the capacitor device 100 has a different arrangement.

[0060] According to the embodiment shown here, the capacitor device 100 is arranged between the third intermediate circuit capacitor 530 and the second intermediate circuit capacitor 520.

[0061] Fig. 10 shows a schematic representation of an embodiment of a capacitor device 500. The capacitor device 500 is similar to the capacitor device of Fig. 7 and / or Fig. 8 and / or Fig. 9, except that the capacitor device 100 has a different arrangement.

[0062] According to the embodiment shown here, the capacitor device 100 is arranged adjacent to the third intermediate circuit capacitor 530.

[0063] Fig. 11 shows a schematic representation of an embodiment of a capacitor device 500.

[0064] The capacitor device 500 has an odd number of intermediate circuit capacitors 510, 520, 530, here only three intermediate circuit capacitors 510, 520, 530 as an example. In addition, the capacitor device 500 has a further capacitor device 1100 in addition to the capacitor device 100.

[0065] In this case, the capacitor device 100 is arranged adjacent to the second intermediate circuit capacitor 520, for example only, and the further capacitor device 1100 is arranged adjacent to the third intermediate circuit capacitor 530. The adjacent intermediate circuit capacitor 510 is therefore arranged between the second intermediate circuit capacitor 520 and the third intermediate circuit capacitor 530, for example only.

[0066] The capacitor devices 100, 1100 each have, by way of example only one capacitor or a small capacitance and are therefore, for example, narrower than the intermediate circuit capacitors 510, 520, 530.

[0067] In other words, Fig. 11 shows an arrangement of capacitor devices 100, 1100 with an odd number of intermediate circuit capacitors 510, 520, 530, which can also be referred to as elements. The capacitor device 100 can also be divided depending on the number of intermediate circuit capacitors 510, 520, 530. Thus, the optimal electrical design can be implemented despite the odd number of intermediate circuit capacitors 510, 520, 530. The capacitor device 100 can either be divided into two capacitor devices 100, 1100 or replaced by two capacitor devices 100, 1100 with half the capacity.

[0068] Fig. 12 shows a schematic representation of an embodiment of a capacitor device 500. The capacitor device 500 is similar or corresponds to the capacitor device of Fig. 11 except that the capacitor devices 100, 1100 are arranged differently.

[0069] According to one embodiment, the adjacent intermediate circuit capacitor 510 is arranged between the capacitor devices 100, 1100. In other words, the capacitor device 100 is arranged between the adjacent intermediate circuit capacitor 510 and the second intermediate circuit capacitor 520. The further capacitor device 1100 is arranged between the adjacent intermediate circuit capacitor 510 and the third intermediate circuit capacitor 530.

[0070] Fig. 13 shows a plan view of an embodiment of a capacitor device 100. The capacitor device 100 is similar to or corresponds to the capacitor device from one of the figures described above.

[0071] The capacitor device 100 is arranged merely by way of example between the adjacent intermediate circuit capacitor 510 and the second intermediate circuit capacitor 520.

[0072] The second busbar 120 is electrically contacted, merely by way of example, with another busbar 1300, for example, from a printed circuit board. The third busbar 130 is electrically contacted with an additional busbar 1310. The contact area 1305 is shown, for example, by dashed lines.

[0073] In other words, Fig. 13 shows a connection of the busbars 120, 130, which can also be referred to as YC busbars, to the further busbar 1300 and the additional busbar 1310, which can also be referred to as DC busbars. The tabs of the second busbar 120 and the third busbar 130 can be connected to the respective DC busbars, for example, using a laser welding process.

[0074] Fig. 14 shows an illustration of an embodiment of a capacitor device 100. The capacitor device 100 is similar or corresponds to the capacitor device from one of the figures described above. More specifically, Fig. 14 a sectional view of the capacitor device 100.

[0075] The housing 115 forms, for example, a screw dome 400. The first busbar 110 rests, for example, on an upper side of the screw dome 400, so that the first busbar 110 is connected to the screw dome 400 via a connecting element 1400, for example, a screw. Thus, the screw dome is designed as a ground connection.

[0076] According to one embodiment, the screw dome 400 extends from the bottom 455 of the housing 115 toward the cover 155 of the housing 115. A through-opening 1410 in the housing 115 is configured to receive the connecting element 1400 so that the connecting element 1400 can connect the first busbar 110 to the screw dome 400.

[0077] In other words, Fig. 14, the housing 115 for a ground connection. The ground connection can be realized via the first busbar 110 and the screw dome 400 in the housing 115.

[0078] Fig. 15 shows an exploded view of an embodiment of a capacitor device 100. The capacitor device 100 is similar to or corresponds to the capacitor device from one of the figures described above.

[0079] The arrangement of the capacitors 105, 125 in the housing 115 or in the receiving areas 135, 145 is illustrated by way of example by means of an arrow. According to one embodiment, each capacitor 105, 125 has two pins 1505, 1515, 1525, 1535, onto which the busbars are plugged, as shown by way of example in Fig. 16 is shown.

[0080] In other words, Fig. 15 shows an assembly concept of the capacitor device 100. The capacitors 105, 125 are inserted into the receiving areas 135, 145, which can also be referred to as pockets, and are glued and / or potted.

[0081] Fig. 16 shows an illustration of an embodiment of a capacitor device 100. The capacitor device 100 is similar or corresponds to the capacitor device of Fig. 15, with the exception that the capacitors 105, 125 are arranged in the housing 115. The first power rail 110 is arranged on the capacitors 105, 125. More precisely, the first power rail 110 has two openings each, by means of which the first power rail 110 is plugged onto the pin 1505 of the capacitor 105 and onto the pin 1525 of the further capacitor 125. The second power rail 120 also has an opening by means of which the second power rail 120 is arranged onto the further pin 1515 of the capacitor 105. The third power rail 130 also has an opening, which is plugged onto the further pin 1535 of the further capacitor 125 in order to connect the third power rail 130 to the further capacitor 125. The second busbar 120 and the third busbar 130 protrude beyond an edge of the housing 115, so that the busbars 120, 130 can be contacted, for example, with another busbar, as is shown by way of example in Fig. 13 is shown.

[0082] In other words, Fig. 16 shows an assembly concept of the capacitor device 100. The small busbars 110, 120, 130 are plugged via holes onto the pins 1505, 1515, 1525, 1535 of the capacitors 105, 125 and soldered and / or welded.

[0083] Fig. 17 shows a schematic representation of an embodiment of a motor vehicle 1700. Wheels 1705 of the motor vehicle 1700, four wheels only by way of example, an electrical energy storage device 1710, for example a battery, and an electric axle drive 1715 are shown. The electric axle drive 1715 includes a power converter 1720, an electric machine 1725, and a transmission device 1730.

[0084] Electrical energy for operating the electric machine 1725 is provided by a power supply device, here the electrical energy storage device 1710. The electrical energy storage device 1710 is designed to provide direct current, which is converted into an alternating current, for example a three-phase alternating current, using a power converter 1720 of the electric axle drive 1715 and provided to the electric machine 1725. A shaft driven by the electric machine 1725 is coupled directly or using the transmission device 1730 to at least one wheel 1705 of the motor vehicle 1700. Thus, the motor vehicle 1700 can be propelled using the electric machine 1725. According to one exemplary embodiment, the electric axle drive 1715 comprises a housing in which the power converter 1720, the electric machine 1725, and the transmission device 1730 are arranged.

[0085] According to one embodiment, the power converter 1720 comprises at least one capacitor device 500, as described with reference to the preceding figures. For example, the capacitor device 500 is arranged in an intermediate circuit of the power converter 1720.

[0086] Fig. 18 shows a flowchart of an embodiment of a method 1800 for manufacturing a capacitor device. The capacitor device corresponds to or is similar to the capacitor device from one of the figures described herein.

[0087] The method 1800 includes a step 1805 of providing the at least one capacitor, the housing, the first bus bar, and the second bus bar. Additionally, the method 1800 includes a step 1810 of arranging the at least one capacitor in the housing and a step 1815 of attaching the first bus bar and the second bus bar to the at least one capacitor to produce the capacitor device.

[0088] The embodiments described and shown in the figures are selected only as examples. Different embodiments can be combined with each other completely or with regard to individual features. Furthermore, one embodiment can be supplemented by features of another embodiment.

[0089] Furthermore, method steps according to the invention can be repeated and carried out in a different order than that described.

[0090] If an embodiment comprises an “and / or” link between a first feature and a second feature, this can be read such that the embodiment according to one embodiment has both the first feature and the second feature and according to another embodiment has either only the first feature or only the second feature. Reference symbol 100 Condenser device 105 Capacitor 110 first busbar 115 housings 120 second busbar 125 additional capacitor 130 third busbar 135 Recording area 140 passage opening 145 additional recording area 150 coupling element 155 lids 160 counter-coupling element 170 additional counter-coupling element 180 third negative feedback element 400 screw dome 410 first area 412 second area 450 additional coupling element 455 floor 500 capacitor device 510 adjacent DC link capacitor 511 first busbar of the adjacent DC link capacitor 512 second busbar of the adjacent DC link capacitor 515 Housing of the adjacent DC link capacitor 516 Coupling element of the adjacent DC link capacitor 518 Negative feedback element of the adjacent intermediate circuit capacitor 520 second intermediate circuit capacitor 521 first busbar of the second intermediate circuit capacitor 522 second busbar of the second intermediate circuit capacitor 525 Housing of the second intermediate circuit capacitor 526 Coupling element of the second intermediate circuit capacitor 528 Negative feedback element of the second intermediate circuit capacitor 530 third intermediate circuit capacitor 531 first busbar of the third intermediate circuit capacitor 532 second busbar of the third intermediate circuit capacitor 535 Housing of the third intermediate circuit capacitor 536 Coupling element of the third intermediate circuit capacitor 538 Negative feedback element of the third intermediate circuit capacitor 540 fourth intermediate circuit capacitor 541 first busbar of the fourth intermediate circuit capacitor 542 second busbar of the fourth intermediate circuit capacitor 545 Housing of the fourth intermediate circuit capacitor 546 Coupling element of the fourth intermediate circuit capacitor 548 Negative feedback element of the fourth intermediate circuit capacitor 558 further second negative feedback element of the fourth intermediate circuit capacitor 568 further negative feedback element of the fourth intermediate circuit capacitor 618 further negative feedback element of the adjacent intermediate circuit capacitor 628 further negative feedback element of the second intermediate circuit capacitor 636 additional coupling element of the third intermediate circuit capacitor 638 additional negative feedback element of the third intermediate circuit capacitor 1100 additional capacitor device 1300 additional busbars 1305 Area of ​​contact 1310 additional busbar 1400 connecting element 1410 Through hole in the housing 1505 pin of the capacitor 1515 additional pin of the capacitor 1525 Pin of the additional capacitor 1535 additional pin of the additional capacitor 1700 motor vehicles 1705 wheel 1710 electrical energy storage 1715 electric axle drive 1720 power converter 1725 electric machine 1730 Gearbox 1800 Method for producing a capacitor device 1805 Deployment step 1810 Step of arranging 1815 Step of attachment

Claims

[1] Capacitor device (100) for a capacitor apparatus (500) for an inverter of a motor vehicle (1700), the capacitor device (100) having the following features: at least one capacitor (105); a housing (115) for accommodating the at least one capacitor (105); and a first busbar (110) and a second busbar (120) for electrically contacting the capacitor device (100), wherein the capacitor (105) is or can be electrically contacted between the first busbar (110) and the second busbar (120). [2] Capacitor device (100) according to claim 1, with a further capacitor (125) which is arranged or can be arranged in the housing (115) and with a third busbar (130) for electrically contacting the capacitor device (100), wherein the further capacitor (125) is or can be electrically contacted between the first busbar (110) and the third busbar (130), in particular wherein the second busbar (120) and the third busbar (130) are or can be electrically insulated from one another. [3] Capacitor device (100) according to one of the preceding claims, wherein the housing (115) forms a screw dome (400) which is connected or connectable to the first busbar (110) via a connecting element (1400), in particular wherein the screw dome (400) is designed as a ground connection. [4] Capacitor device (100) according to one of the preceding claims, wherein the capacitor (105) is connected or can be connected as a Y-capacitor. [5] Capacitor device (100) according to one of the preceding claims, with at least one coupling element (150) which is arranged on the housing (115) and which is shaped to couple the capacitor device (100) to a counter-coupling element (518) of an adjacent intermediate circuit capacitor (510) and / or with at least one counter-coupling element (160) which is arranged on the housing (115) and which is shaped to couple the capacitor device (100) to a coupling element of the adjacent intermediate circuit capacitor (510). [6] Capacitor device (100) according to one of the preceding claims, wherein the coupling element (150) of the capacitor device (100) is arranged on a cover (155) of the housing (115) and wherein the counter-coupling element (160) of the capacitor device (100) is arranged on a base (455) of the housing (115) opposite the cover (155) and / or wherein the coupling element (150) is shaped to couple the capacitor device (100) in a form-fitting or force-fitting manner to the adjacent intermediate circuit capacitor (510). [7] Capacitor device (500) with a capacitor device (100) according to one of the preceding claims and with an adjacent intermediate circuit capacitor (510), wherein the capacitor device (100) is coupled or can be coupled to the adjacent intermediate circuit capacitor (510). [8] Capacitor device (500) according to claim 7, wherein the intermediate circuit capacitor (510) is connected or can be connected as an X-capacitor. [9] Capacitor device (500) according to one of claims 7 to 8, comprising a plurality of intermediate circuit capacitors (510, 520, 530, 540), wherein the capacitor device (100) is or can be coupled between the intermediate circuit capacitors (510, 520, 530, 540) and / or adjacent to a plurality of intermediate circuit capacitors (510, 520, 530, 540). [10] Capacitor device (500) according to one of claims 7 to 9, with a further capacitor device (1100), wherein at least one intermediate circuit capacitor (510, 520, 530, 540) is coupled or can be coupled between the capacitor device (100) and the further capacitor device (1100). [11] Power converter (1720) comprising a capacitor device (500) according to one of claims 7 to 10. [12] Electric axle drive (1715) for a motor vehicle (1700), wherein the electric axle drive (1715) comprises at least one electric machine (1725), a transmission device (1730) and a power converter (1720) according to claim 11. [13] Motor vehicle (1700) comprising a power converter (1720) according to claim 11 and / or an electric axle drive (1715) according to claim 12. [14] A method (1800) for manufacturing a capacitor device (100) according to any one of claims 1 to 6, wherein the method (1800) comprises the following steps: Providing (1805) the at least one capacitor, the housing (115), the first busbar (110) and the second busbar (120); Arranging (1810) the at least one capacitor (105) in the housing (115); and Attaching (1815) the first bus bar (110) and the second bus bar (120) to the at least one capacitor (105) to produce the capacitor device (100). [15] Computer program product with program code for carrying out the method (1800) according to claim 14, when the computer program product is executed on a control device.

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