Integrated DC support capacitor

Abstract

The utility model relates to an integrated DC support capacitor, comprising a housing which comprises a bottom and a peripheral wall and also comprises an opening opposite to the bottom; the input sub-capacitors are fixedly accommodated in the space of the first side in the shell, and each input sub-capacitor is provided with a first positive terminal and a first negative terminal; the output sub-capacitors are fixedly accommodated in a space of a second side, opposite to the first side, in the shell, and each output sub-capacitor is provided with a second positive terminal and a second negative terminal; the input positive busbar and the input negative busbar are electrically insulated from each other, the input positive busbar is electrically connected to all the first positive terminals, and the input negative busbar is electrically connected to all the first negative terminals; and an output positive busbar and an output negative busbar which are electrically insulated from each other, wherein the output positive busbar is electrically connected to all the second positive terminals and the output negative busbar is electrically connected to all the second negative terminals. According to the invention, the requirements of higher voltage and higher power can be met, and the occupied space can be saved.

Description

TECHNICAL FIELD

[0001] The present application relates generally to an integrated DC support capacitor. BACKGROUND

[0002] With the development, there is a trend and requirement for the electrical drive system (especially the power conversion unit (also referred to as PTU)) of various types of vehicles (such as automotive vehicles) to have higher voltage and higher power, especially for electric vehicles.

[0003] When powering the electrical drive system, the alternating current or alternating voltage is usually supplied to the electrical drive system by the power supply after the direct current is converted into alternating current by the inverter or power module (also referred to as PM) to drive the rotation of the motor therein. However, as the voltage and power required by the electrical drive system become higher and higher, the ripple current in the current supplied by the power supply to the inverter or power module is also correspondingly increased, which in turn leads to a decrease in current stress.

[0004] As those skilled in the art will know, in order to remove the ripple current in the direct current, it is usually known to filter the ripple current from the direct current supplied by the power supply, which is usually achieved by means of a current support capacitor. The current support capacitor is connected in series to the input line of the inverter or power module to filter or absorb the ripple current in the direct current.

[0005] As mentioned before, with higher voltage and higher power, the small capacity of a single DC support capacitor has been unable to meet the filtering or absorption requirements. Although it can be envisaged to provide more current support capacitors in the circuit to expand the voltage and power that they can handle, obviously, this will increase the space occupation, especially it can be necessary to occupy more PCB board electrical contacts to connect these separate DC support capacitors, and thus a larger PCB board is required and thus occupies more space. This is obviously not conducive to the limited vehicle space. In addition, usually, the input and output DC support capacitors for the inverter or power module are usually separately and dispersedly arranged at different circuit positions, thus also increasing the space occupation.

[0006] Therefore, it is desirable to have an improved integrated DC support capacitor which can meet the requirements of higher voltage and higher power on the one hand, and can achieve space occupation on the other hand. SUMMARY

[0007] According to the present application, an integrated DC support capacitor is provided, comprising:

[0008] a housing comprising a bottom and a peripheral wall and further comprising an opening opposite to the bottom;

[0009] input sub-capacitors each having a first positive terminal and a first negative terminal fixedly accommodated in a space of a first side within the housing;

[0010] output sub-capacitors each having a second positive terminal and a second negative terminal fixedly accommodated in a space of a second side opposite to the first side within the housing;

[0011] an input positive bus and an input negative bus electrically insulated from each other, the input positive bus being electrically connected to all the first positive terminals and the input negative bus being electrically connected to all the first negative terminals; and

[0012] an output positive bus and an output negative bus electrically insulated from each other, the output positive bus being electrically connected to all the second positive terminals and the output negative bus being electrically connected to all the second negative terminals.

[0013] Optionally, the input sub-capacitors and the output sub-capacitors are each selected as a thin-film capacitor.

[0014] Optionally, the input positive bus is configured to be electrically connected between an input end of the power module and a positive pole of the power source; the output positive bus is configured to be electrically connected between an output end of the power module and an input end of the load; and the input negative bus and the output negative bus are configured to be electrically connected between a negative pole of the power source and an output end of the load.

[0015] Optionally, the input positive bus and the input negative bus each include a first input terminal and a first output terminal extending from an opening toward the outside of the housing; the output positive bus and the output negative bus each include a second input terminal and a second output terminal extending from an opening toward the outside of the housing; and the first input terminal and the second input terminal are respectively positioned on the first side and the second side.

[0016] Optionally, the input sub-capacitors and the output sub-capacitors are regularly and uniformly arranged on the first side and the second side, respectively; and the input sub-capacitors are the same as or different from each other, and the output sub-capacitors are the same as or different from each other.

[0017] Optionally, the integrated DC support capacitor further includes a positive bus directly electrically connected to a corresponding first input terminal of the input positive bus via a corresponding first positive terminal and directly electrically connected to a corresponding second input terminal of the output positive bus via a corresponding second positive terminal.

[0018] Optionally, the integrated DC support capacitor further includes a negative bus electrically insulated from the positive bus, the negative bus being directly electrically connected to a corresponding first output terminal of the input negative bus via a corresponding negative terminal, wherein the negative bus is in a plate shape and is stacked on the outside or above the positive bus.

[0019] Optionally, the integrated DC support capacitor is configured to be fitted adjacent to the power module at the position of the opening such that the power module is connected to the positive busbar via the input electrical contacts on the positive busbar close to the first positive terminal position and to the positive busbar via the output electrical contacts on the positive busbar close to the second positive terminal position.

[0020] Optionally, the integrated DC support capacitor is configured to be fitted adjacent to the power module at the position of the opening such that the power module is connected to the positive busbar via the input electrical contacts on the positive busbar close to the first positive terminal position and to the positive busbar via the output electrical contacts on the positive busbar close to the second positive terminal position.

[0021] Optionally, the housing, the positive busbar and the negative busbar are configured to be fixedly positioned with respect to each other to ensure a stable positioning of the housing with respect to the positive busbar and the negative busbar.

[0022] By means of the present application, on the one hand, the demand for higher voltages and higher powers can be met, and on the other hand, a saving in terms of space occupation can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 a perspective view of an integrated DC support capacitor according to a first embodiment of the present application is shown, wherein no respective busbars for the input sub-capacitor and the output sub-capacitor are shown;

[0024] Figure 2 a perspective view of an integrated DC support capacitor according to a first embodiment of the present application is shown, wherein respective positive busbars and negative busbars for the input sub-capacitor and the output sub-capacitor are shown;

[0025] Figure 3 a perspective view of the structure of respective positive busbars and negative busbars for the input sub-capacitor and the output sub-capacitor of an integrated DC support capacitor according to a first embodiment of the present application is shown;

[0026] Figure 4 a perspective view of an integrated DC support capacitor according to a first embodiment of the present application is shown, wherein no respective busbars for the input sub-capacitor and the output sub-capacitor are shown; Figure 2 a perspective view of an integrated DC support capacitor according to a first embodiment of the present application is shown, wherein no respective busbars for the input sub-capacitor and the output sub-capacitor are shown;

[0027] Figure 5 a perspective view of an integrated DC support capacitor according to a first embodiment of the present application is shown, wherein no respective busbars for the input sub-capacitor and the output sub-capacitor are shown; Figure 2 a perspective view of an integrated DC support capacitor according to a first embodiment of the present application is shown, wherein no respective busbars for the input sub-capacitor and the output sub-capacitor are shown;

[0028] Figure 6 a perspective view of an integrated DC support capacitor according to a first embodiment of the present application is shown, wherein no respective busbars for the input sub-capacitor and the output sub-capacitor are shown; DETAILED DESCRIPTION

[0029] The details shown herein are merely by way of example, for illustrative discussion of the disclosed embodiments, and for providing a description of the principles and conceptual aspects that are easy to understand. In this respect, no attempt is made to show structural details in more detail than is necessary for a fundamental understanding, and the description taken with the drawings make apparent to those skilled in the art how the disclosed integrated current support capacitor can be embodied in practice.

[0030] Figure 1 A perspective view of an integrated DC support capacitor according to a first embodiment of the present application is shown, wherein any respective busbars for the input sub-capacitors and the output sub-capacitors are not shown

[0031] As Figure 1 shown, the integrated DC support capacitor 1 according to the first embodiment comprises a housing 10 which comprises a bottom 12 (not shown) and a peripheral wall 14 and further comprises an opening 16 opposite to the bottom. As envisaged, the peripheral wall 14 surrounds the bottom to form a hollow space, thus the opening 16 is also the opening of the hollow space. As Figure 1 shown, although in the first embodiment of the present application the housing is configured in a substantially regular rectangular shape, it is to be appreciated that any geometric shape is possible without limitation. Optionally, the housing is made of any suitable material, e.g. insulating or non-insulating material, e.g. any suitable organic or inorganic material.

[0032] Further, the integrated DC support capacitor 1 further comprises input sub-capacitors 20 and output sub-capacitors 30. Optionally, a plurality of input sub-capacitors 20 and / or a plurality of output sub-capacitors 30 are comprised. As will be appreciated, the meaning of input here means the connection position with respect to an electronic device such as a power module, an inverter, etc. As is well known to those skilled in the art, for a power module, the input sub-capacitors mean the capacitors connected to the input terminals of the power module while the output sub-capacitors mean the capacitors connected to the output terminals of the power module. For other possible electronic devices, input and output also mean similar meanings: input means connected to the input side of the electronic device while output means connected to the output side of the electronic device. Since the DC support capacitor 1 comprises both input sub-capacitors 20 and output sub-capacitors 30, this improved DC support capacitor is referred to herein as integrated DC support capacitor 1. Obviously, in the case of a power module, the input sub-capacitors 20 are able to filter out the ripple current etc. from the current from a power source; while the output sub-capacitors 30 are able to stabilize the current output, reduce ESR, etc. It is to be noted that the related functions of the input sub-capacitors and the output sub-capacitors are well known and are not additionally described herein.

[0033] Considering the increasing voltage and power demand, the requirement of overcoming disturbances such as ripple current and maintaining stable voltage and / or current is also expanding, it is obvious that the requirement for the capacitance of the input and output sub-capacitors themselves is also correspondingly greater. In the case of limited single sub-capacitors, it is obviously an effective way to increase the number of output and input sub-capacitors.

[0034] However, as previously described, directly increasing the number of relevant sub-capacitors without proper planning and design will exacerbate space occupation, especially in the case of separate input and output sub-capacitors.

[0035] In the first embodiment of the present application, the input sub-capacitors 20 are fixedly accommodated in the space of the first side of the housing and each has a first positive terminal and a first negative terminal; and the output sub-capacitors 30 are fixedly accommodated in the space of the second side of the housing opposite to the first side and each has a second positive terminal and a second negative terminal. It should be noted that the first and second sides are only for the need of description and are not limited. The first side represents a certain area in the hollow space of the housing and the second side accordingly represents the other part opposite to the certain area. Therefore, it is understood that in the embodiments of the present application, the input sub-capacitors 20 and the output sub-capacitors 30 are centrally arranged in the determined area of the hollow space without crossing each other. In the Figure 1 In the subsequent embodiments, it can be considered that the space in the housing 10 is generally evenly distributed and the corresponding sub-capacitors are accordingly centrally arranged (for example, aligned arrangement or any other evenly distributed arrangement or possibly unevenly distributed arrangement). Optionally, in the housing 1, there are single-layer input sub-capacitors 20 and single-layer output sub-capacitors 30 respectively, but any other appropriate corresponding layer number, whether the same or not, is also possible. Optionally, each of the input sub-capacitors 20 and the output sub-capacitors 20 can be selected to be the same or different (including but not limited to model, specification, parameter and / or size, etc.). Further, the input sub-capacitors 20 and the output sub-capacitors 30 can be composed of the same sub-capacitors (including but not limited to model, specification, parameter and / or size, etc.), that is, each of the input sub-capacitors 20 and each of the output sub-capacitors 30 are the same. In the various figures of the present application, the input sub-capacitors 20 are shown as four sub-capacitors arranged in alignment with each other inside the housing 10, and the output sub-capacitors 30 are shown as six sub-capacitors arranged in alignment with each other inside the housing 10. Of course, the number of input sub-capacitors 20 and output sub-capacitors 30 can be appropriately selected according to the need and the specification of the sub-capacitors, which is not additionally limited here.

[0036] Further, Figure 2A perspective view of an integrated DC support capacitor according to the first embodiment of the present application is shown, wherein respective positive and negative busbars for input sub-capacitors and output sub-capacitors are shown accordingly. In more detail, Figure 3 A perspective view of the structure of respective positive and negative busbars for input sub-capacitors and output sub-capacitors of an integrated DC support capacitor according to the first embodiment of the present application is shown. On this basis, Figure 4 An exploded perspective view of an integrated DC support capacitor according to the first embodiment of the present application is shown as Figure 2 indicated and Figure 5 A cross-sectional view of an integrated DC support capacitor according to the first embodiment of the present application is shown as Figure 2 indicated. As Figures 2-5 indicated, the integrated DC support capacitor further comprises an input positive busbar 22 and an input negative busbar 24 which are electrically insulated from each other and an output positive busbar 32 and an output negative busbar 34 which are electrically insulated from each other.

[0037] With reference to Figure 2 In the embodiment shown in Fig. 5, the input positive busbar 22 is electrically connected to all first positive terminals and the input negative busbar 24 is electrically connected to all first negative terminals, in other words, all first positive terminals of the input sub-capacitors 20 are electrically connected to the input positive busbar 22 and all first negative terminals are electrically connected to the input negative busbar 24. Optionally, the input positive busbar 22 comprises at least one first input terminal 220 and the input negative busbar comprises at least one first output terminal 240. As will be appreciated by the skilled person, different total capacitances of the input sub-capacitors 20 connected into the circuit can be achieved by selecting different combinations of first input terminals 220 and first output terminals 240, for example, connecting a first first input terminal 220 and a first first output terminal 240 to the circuit corresponds to a first input capacitance being connected into the circuit; while a first first input terminal 220 and a second first output terminal 240 connected to the circuit corresponds to a second input capacitance being connected into the circuit. The selection of further input capacitances connected into the circuit can be similarly achieved by selecting different combinations of first input terminals 220 and first output terminals 240 which will not be further elaborated here.

[0038] Similarly, the output positive busbar 32 is electrically connected to all second positive terminals and the output negative busbar 34 (not explicitly shown) is electrically connected to all second negative terminals. The output positive busbar 32 also has at least one second input terminal 320 similar to the input positive busbar 22 and the output negative busbar 34 also has at least one second output terminal 340 similar to the input negative busbar 24. Although only one second input terminal 320 and one second output terminal 340 are shown in the drawings of the present application, it is still optional that in the case of multiple second input terminals 320 and second output terminals 340, different total capacitances of the output sub-capacitor 30 connected in the circuit can still be achieved by selecting different combinations of different second output terminals 320 and different second input terminals 340.

[0039] Optionally, both the input sub-capacitor 20 and the output sub-capacitor 30 are selected to be thin film capacitors. This is exemplary only and those skilled in the art will appreciate that other types of capacitors in any suitable form can be employed without departing from the scope of the present application.

[0040] Optionally, Figures 1-5 The illustrated integrated DC support capacitor 1 is configured for use in a power module or inverter (not shown, described later). Optionally, the power module or inverter is configured to transform a direct current into an alternating current. Optionally, the power module or inverter is configured for use in an electric drive train of a vehicle, in particular an electrically powered vehicle, to transform a direct current from a direct current power source into an alternating current to drive an electric motor of the vehicle.

[0041] In this case, the input positive busbar 22 or the input terminal 220 of the input positive busbar 22 is configured to be electrically connected between the input terminal of the power module (not shown) and the positive pole of the power supply (not shown), especially in the circuit therebetween such that the ripple current can be filtered out. As will be understood by those skilled in the art, the input negative busbar 24 or the input terminal 240 of the input negative busbar 24 is configured to be directly electrically connected to the negative pole of the power supply (the direct means that there is no load component other than the electrical connection such as a wire between the input negative busbar 24 or the input terminal 240 of the input negative busbar 24 and the circuit of the negative pole of the power supply). The position of the input negative busbar 24 or the input terminal 240 of the input negative busbar 24 is also known to those skilled in the art and will not be described in addition here. Similarly, the output positive busbar 32 or the output terminal 320 thereof is configured to be electrically connected between the output terminal of the power module (not shown) and the input terminal of the load, especially in the circuit therebetween such that the stable current or voltage can be provided. The connection position of the output positive busbar 34 or the output terminal 340 thereof in the circuit is the same as or similar to that of the input negative busbar 24 or the input terminal 240 of the input negative busbar 24, that is, also directly electrically connected to the negative pole of the power supply, which has the same meaning as above. Optionally, the input negative busbar 24 (or the terminal thereof) and the output negative busbar 34 (or the terminal thereof) are configured to be electrically connected between the negative pole of the power supply and the output terminal of the load, it is understood that the load represents the collection of all loads in the circuit, rather than a specific load. Therefore, in the embodiments of the present application, the load can include one or more individual loads unless explicitly excluded.

[0042] Optionally, respective first input terminals 220 and first output terminals 240 of input positive bus 22 and input negative bus 24 each bore 222, 242 and extend outwardly to, for example, form protrusions 224, 244. This can facilitate connection of the first input terminals 220 and first output terminals 240 to respective circuits. Similarly, second input terminals 320 and second output terminals 340 of output positive bus 32 and output negative bus 34 each bore 322, 342 and extend outwardly to, for example, form protrusions. Optionally, the first input terminals 220 and first output terminals 240 and the second input terminals 320 and second output terminals 340 extend horizontally outwardly of the housing to conserve space. It is contemplated that, for simplicity of construction, the first input terminals 220 and second input terminals 320 can be designed to be positioned on the first side and second side, respectively, corresponding to the respective input sub-capacitors and output sub-capacitors, or to extend outwardly of the housing from the first side and second side, respectively, such that the first input terminals 220 and second input terminals 320 are spaced apart by a sufficient distance to facilitate connection of the circuits and to some extent prevent miswiring. Of course, it is contemplated that the first output terminals 240 and second output terminals 340 can also be configured to be positioned on the first side or the same side as the first input terminals 220 and on the second side or the same side as the second input terminals 320, respectively. It is also contemplated that the first input terminals 220 and second input terminals 320 can be designed to be positioned on the same side (e.g., one of the first side and second side) and the first output terminals 240 and second output terminals 340 configured to be positioned on the other side. It is also contemplated that the first input terminals 220, second input terminals 320, and first output terminals 240 can be designed to be positioned on the same side (e.g., one of the first side and second side) and the second output terminals 340 configured to be positioned on the other side. Based on the foregoing, any other positioning relationship of the first input terminals 220, second input terminals 320, first output terminals 240, and second output terminals 340 relative to each other is contemplated without departing from the scope of the present application, which is simply illustrated herein. For example, at least one of the first input terminals 220, second input terminals 320, first output terminals 240, and second output terminals 340 can be positioned on a side other than the first side and second side in the housing without departing from the scope of the present application. Moreover, different combinations of these different side positions are also contemplated without departing from the scope of the present application.

[0043] Optionally, as Figures 1-5The integrated DC link support capacitor 1 also comprises a cover portion that engages the opening 16 of the housing 10 to at least partially close the opening 16, e.g., such that the various sub-capacitors (input and / or output) in the integrated DC link support capacitor 1 in the first embodiment, as well as the bodies of their corresponding associated bus bars, are spaced apart from the external environment (especially in the case of a complete closing of the opening), and on the other hand, achieve compactness and ensure stable positioning of the various components. In fact, the shape and form of the cover portion is not limited here, and any structure or configuration that achieves at least partial closing of the housing 10 can be selected as the cover portion of the present application without departing from the scope of the present application.

[0044] In addition, and optionally, as Figures 1-5 The integrated DC link support capacitor 1 also comprises a filler portion 18 that fills the empty space in the hollow space of the housing in liquid form after the input and output sub-capacitors 20 and 30 and the corresponding input and output bus bars (positive or negative) are installed in the housing 10 in a determined position and is solidified to form a solid body, thereby fixing the various corresponding components or assemblies, e.g., sub-capacitors, various bus bars, etc., in the housing 10. Thus, the shape of the filler portion is generally the same and complementary to the shape of the hollow space in the housing as a whole. Optionally, the filler portion 18 is insulating, e.g., made of any organic or inorganic material known in the art.

[0045] The second embodiment of the present application will be further described below, in which, Figure 6 A general perspective view of the integrated DC link support capacitor 1 according to the second embodiment of the present application is shown in adjacent cooperation with the power module 40. The second embodiment differs from the first embodiment in that: (1) the integrated DC link support capacitor 1 also comprises a positive bus bar 52 and / or a negative bus bar 54 and (2) optionally, the power module 40 that can be in adjacent cooperation with the integrated DC link support capacitor 1.

[0046] As Figure 6As shown, the positive busbar 52 is directly electrically connected to the respective first input terminal 220 of the input positive busbar 22 via a corresponding first positive terminal 522 and to the respective second input terminal 320 of the output positive busbar 32 via a corresponding second positive terminal 524, in other words, the positive busbar 52 directly connects the input positive busbar 22 and the output positive busbar 32 or their respective first input terminal 220 and second input terminal 320. It can also be explained that the positive busbar 52 directly short-circuits the input positive busbar 22 and the output positive busbar 32. Optionally, the positive busbar 52 is in a plate shape and is disposed across the opening 16 of the housing 10, which corresponds to the case where the first input terminal 220 and the second input terminal 320 are respectively located on both sides of the outlet. For other first input terminal 220 and second input terminal 320 position settings, the positive busbar 52 can still be in a plate shape but can not cross the opening 16. In fact, the setting position of the positive busbar 52 relative to the outlet 16 can be optional and not limited.

[0047] Optionally, the integrated DC support capacitor 1 further comprises a negative busbar 54 electrically insulated from the positive busbar 52, the negative busbar 54 being directly electrically connected to the respective first output terminal 240 of the input negative busbar 24 via a corresponding negative terminal 542. It is also optional that the negative busbar 54 is directly electrically connected to the respective first output terminal 240 of the input negative busbar 24 and to the respective second output terminal 340 of the output negative busbar 34 without departing from the scope of the present application. As an example, the negative busbar 54 is also in a plate shape and is stacked above the positive busbar 52 or more outward relative to the housing 1 to form a compact configuration. Of course, it can be envisaged that the negative busbar 54 is also in a plate shape and is stacked below the positive busbar 52 or more inward relative to the housing 1 to form a compact configuration

[0048] Reference will now be made to Figure 6 The cooperation or connection between the power module 40 and the positive busbar 52 will now be described. The power module 40 is optionally cooperatively connected to the integrated DC support capacitor adjacent, for example, at the opening 16 of the housing 1 or at a suitable location on the cover 18, it being understood that, in using the integrated DC support capacitor 1 of the present embodiment, the first positive terminal 522 is connected between the positive pole of the power supply (not shown) and the input terminal of the power module 40 and the second positive terminal 524 is connected between the output terminal of the power module 40 and the input of the load.

[0049] Optionally, the power module 40 is configured to be arranged as close as possible to the integrated DC support capacitor 1. In this case, the power module 40 is connected to the positive busbar 52 via the input electrical contact 42 (or wire or terminal) on the positive busbar 52 at a position closer to the first positive terminal 522, i.e. further away from the second positive terminal 524 with respect to the ground. At this time, the integrated DC support capacitor 1 is connected to the circuit (especially the positive pole of the power supply) via the first positive terminal 522. Therefore, in this case, the ripple current selectively flows to the first positive terminal 220 of the input positive busbar 22 due to the resistance of the busbar 52 itself, is absorbed or filtered by the input sub-capacitor 20 and the DC current is delivered to the power module 40. Accordingly, the output of the power module 40 is connected to the positive busbar 52 via the output electrical contact 44 (or wire or terminal) on the positive busbar 52 at a position closer to the second positive terminal 524, i.e. further away from the first positive terminal 522 with respect to the ground. At this time, the current from the power module 40 to the positive busbar 52 does not flow back to the first positive terminal 522 due to the resistance of the positive busbar 52 (the current path to the first positive terminal 522 is short-circuited due to the distance from the first positive terminal 522), but instead flows to the input side of the load, such as a load, via the second positive terminal 524. At this point, the electrical connection to the terminals of the input positive busbar 22 and the output positive busbar 32 is achieved by means of a single positive busbar 52. Therefore, the input and output of the power module are both connected to the positive busbar 52, thus greatly reducing the current flow distance between the integrated DC support capacitor 1 and the power module 40, thus ensuring further stability of the current and reducing losses.

[0050] It needs to be understood that even for the first embodiment, the integrated DC support capacitor 1 can be configured to be connected in close proximity to the power module 40 so that the power module 40 remains close to the input positive busbar 22 and the output positive busbar 32. Optionally, it can be envisaged that the power module 40 is arranged at the position of the opening. However, it needs to be noted that in the context of the present application, "in close proximity" means as close as possible and "in cooperation" means that there is a certain complementarity or ability to match each other in shape or configuration. Therefore, it can be envisaged that the positive busbar also has a profile portion that cooperates with the peripheral shape of the power module.

[0051] Furthermore, it is contemplated that the housing 10, the positive busbar 52 and the negative busbar 54 are arranged to be fixedly positioned relative to each other to ensure a relatively stable position of the housing 10 with respect to the positive busbar 52 and the negative busbar 54. As an example, it is contemplated that the housing 10, the optional positive busbar 52 and the optional negative busbar 54 each comprise a fixing portion configured to be fixedly connected to a fixed structure, such as a body (e.g. a frame) of an electrically powered vehicle, to ensure a relatively stable position of the housing 10 with respect to the positive busbar 52 and the negative busbar 54. As another example, it is contemplated that the positive busbar and the negative busbar are fixedly clamped between the integrated DC current support and the fixed structure as described above to achieve such a fixed position.

[0052] It is also contemplated that the positive busbar 52 and the negative busbar 54 are connectable to the input positive busbar 22, the input negative busbar 24, the output positive busbar 32, etc. via components such as terminal pins via the openings or terminal holes thereof. The terminal pins are for example configured such that the respective busbar (positive or negative) is directly electrically connected with the desired input or output busbar (positive or negative) or input or output terminal thereof. It is noted that in the second embodiment, the selection of the capacitance in the input sub-capacitor and the output sub-capacitor in the access circuit can generally be referred to the first embodiment, for example by directly electrically connecting the positive busbar and the negative busbar with different combinations of the first input terminals and the first output terminals. Alternatively, it is contemplated that the positive busbar and the negative busbar are arranged in the terminal holes or openings corresponding to the pairs of first input terminals and first output terminals, respectively, to directly electrically connect the corresponding terminal holes or openings in the positive busbar and the negative busbar to the different combinations of the first input terminals and the first output terminals (e.g. by means of terminal pins) when selecting different capacitances of the input sub-capacitor.

[0053] While various embodiments of the present application have been described above, it should be understood that they have been presented by way of example only, and not limitation. Although the present application has been described in detail with respect to various embodiments, it should be understood that various changes, substitutions, and alterations can be made hereto without departing from the scope of the present application.

Claims

1. An integrated DC support capacitor, characterized by The integrated DC support capacitor comprises: a housing comprising a bottom and a peripheral wall and further comprising an opening opposite to the bottom; input sub-capacitors fixedly accommodated in spaces of a first side within the housing, each having a first positive terminal and a first negative terminal; output sub-capacitors fixedly accommodated in spaces of a second side opposite to the first side within the housing, each having a second positive terminal and a second negative terminal; an input positive bus and an input negative bus electrically insulated from each other, the input positive bus being electrically connected to all the first positive terminals and the input negative bus being electrically connected to all the first negative terminals; and an output positive bus and an output negative bus electrically insulated from each other, the output positive bus being electrically connected to all the second positive terminals and the output negative bus being electrically connected to all the second negative terminals.

2. The integrated DC support capacitor of claim 1, wherein, The input sub-capacitors and the output sub-capacitors are each selected as a thin-film capacitor.

3. The integrated DC support capacitor according to claim 1, wherein the input positive bus is configured to be electrically connected between an input end of a power module and a positive pole of a power supply; the output positive bus is configured to be electrically connected between an output end of the power module and an input end of a load; and the input negative bus and the output negative bus are configured to be electrically connected between a negative pole of the power supply and an output end of the load.

4. The integrated DC support capacitor of claim 1, wherein, The input positive bus and the input negative bus each comprise a first input terminal and a first output terminal extending outward from the opening; The output positive bus and the output negative bus each comprise a second input terminal and a second output terminal extending outward from the opening; wherein the first input terminal and the second input terminal are respectively positioned on the first side and the second side.

5. The integrated DC support capacitor of claim 1, wherein, The input sub-capacitors and the output sub-capacitors are regularly and uniformly arranged on the first side and the second side, respectively; The input sub-capacitors are the same as or different from each other, and the output sub-capacitors are the same as or different from each other.

6. The integrated DC support capacitor of claim 4, wherein, The integrated DC support capacitor further comprises a positive bus directly electrically connected to a corresponding first input terminal of the input positive bus via a corresponding first positive terminal and directly electrically connected to a corresponding second input terminal of the output positive bus via a corresponding second positive terminal.

7. The integrated DC support capacitor of claim 6, wherein, The integrated DC support capacitor further comprises a negative bus electrically insulated from the positive bus, the negative bus being directly electrically connected to a corresponding first output terminal of the input negative bus via a corresponding negative terminal, wherein the negative bus is in a plate shape and is stacked outside the positive bus.

8. The integrated DC support capacitor of claim 3, wherein, The integrated DC support capacitor is connected in close proximity to the power module such that the power module is kept close to the input positive bus and the output positive bus, wherein the power module is disposed at or close to a position of the opening of the housing.

9. The integrated DC support capacitor of claim 7, wherein, The integrated DC support capacitor is configured to be connected in close proximity to the power module at the open position such that the power module is connected to the positive busbar via an input electrical contact on the positive busbar proximate to the first positive terminal position and connected to the positive busbar via an output electrical contact on the positive busbar proximate to the second positive terminal position.

10. The integrated DC support capacitor of claim 7, wherein, The housing, the positive busbar, and the negative busbar each include a securing portion configured to be fixedly connected to a fixed structure to ensure the relative positioning of the housing and the positive busbar and the negative busbar.

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