A capacitor module and energy storage converter

Abstract

The application provides a capacitor module, which can improve electrical safety. The application provides a capacitor module, which comprises a shell, a mounting seat located in the shell, the mounting seat being connected with the shell, and a capacitor located in the shell, the capacitor being mounted on the mounting seat and being spaced apart from a wall portion of the shell and insulated from the shell.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, specifically to a capacitor module and an energy storage converter. Background Technology

[0002] Capacitors are widely used in the power electronics industry. A single device may contain multiple capacitors, which are installed inside the device's housing. However, as a device that can store electrical energy, a capacitor can cause the device's housing to become electrified, thus affecting electrical safety. Utility Model Content

[0003] The purpose of this application is to provide a capacitor module and an energy storage converter that can improve electrical safety.

[0004] This application provides a capacitor module, including:

[0005] case;

[0006] Mounting base, the mounting base is located inside the housing, and the mounting base is connected to the housing;

[0007] A capacitor is located inside the housing and is mounted on the mounting base. The capacitor and the wall of the housing are spaced apart and insulated from the housing.

[0008] Optionally, the capacitor and the mounting base are insulated from each other to insulate the capacitor from the housing; or, the mounting base and the housing are insulated from each other to insulate the capacitor from the housing.

[0009] Optionally, the housing includes a first wall portion, and one end of the capacitor is provided with a connecting post extending toward the first wall portion; the mounting base is provided with a socket portion, and the connecting post is inserted into the socket portion;

[0010] An insulating element is provided between at least the connecting post and the hole wall of the insertion portion; or the connecting post and the hole wall of the insertion portion are in direct contact, and at least the portion of the mounting base in contact with the connecting post is made of insulating material.

[0011] Optionally, the capacitor module includes an insulating component, the insulating component including a first insulating pad, the first insulating pad being the insulating element; the first insulating pad is located in the socket portion, the socket portion having a through-hole structure, and the connecting post passing through the first insulating pad;

[0012] The insulating component further includes a first insulating film and a second insulating film. The mounting base has two side surfaces distributed along the extension direction of the insertion hole. The first insulating film is disposed on one side surface, and the second insulating film is disposed on both side surfaces. The first insulating film and the second insulating film each include a first film portion and a second film portion. The first film portion covers at least a portion of the surface of the mounting base, and the second film portion covers at least a portion of the surface of the first insulating pad.

[0013] Optionally, the insulating film, the mounting base, and the first insulating pad are heat-pressed together or bonded together with insulating adhesive.

[0014] Optionally, the insulating assembly further includes a second insulating pad and a third insulating pad. The second insulating pad is provided on one side of the mounting base along the extension direction of the insertion hole, and the third insulating pad is provided on the other side. Both the second insulating pad and the third insulating pad cover at least a portion of the surface of the first membrane portion of the insulating film and at least a portion of the surface of the second membrane portion of the insulating film.

[0015] Optionally, the insulating assembly includes a fourth insulating plate and a fifth insulating plate, the insertion hole is a through hole structure, at least a portion of the fourth insulating plate and the fifth insulating plate is located in the insertion hole and is connected to the other, and the portion of the fourth insulating plate and the fifth insulating plate located in the insertion hole is the insulating element.

[0016] Optionally, the mounting base has two sides distributed along the extending direction of the insertion hole, at least a portion of the fourth insulating plate is disposed on one side of the mounting base, and at least a portion of the fifth insulating plate is disposed on the other side of the mounting base.

[0017] Optionally, one of the end faces where the fourth insulating plate and the fifth insulating plate meet is provided with at least one groove, and the other is provided with a protrusion that mates with the groove.

[0018] Optionally, the socket portion is a through-hole structure, the connecting post is a stud, and the capacitor module further includes a nut, with the portion of the connecting post passing through the socket portion connected to the nut.

[0019] Optionally, the nut is made of insulating material; or, the nut is a metal nut, which is spaced apart from the first wall portion and is insulated from the housing.

[0020] Optionally, the capacitor module further includes an insulating structure disposed between the connecting post and the first wall portion.

[0021] In this application's technical solution, the capacitor module includes a mounting base connected to the housing. The capacitor is mounted on the mounting base, and while the capacitor is spaced apart from the housing, it is also insulated from the housing. This allows the capacitor to be installed inside the housing while preventing the capacitor from causing the housing to become energized, thus improving electrical safety. Furthermore, by using the mounting base to install the capacitor, the capacitor can be pre-assembled onto the mounting base before being assembled into the housing, which also improves assembly efficiency.

[0022] This application also provides an energy storage converter, including the capacitor module described in any of the above claims, which has the same technical effects as the capacitor module described above. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the capacitor module in the first embodiment of this application;

[0024] Figure 2 for Figure 1 Top view of the capacitor module;

[0025] Figure 3 for Figure 1 A cross-sectional view of the capacitor module along the AA direction;

[0026] Figure 4 for Figure 3 A magnified view of part B in the middle;

[0027] Figure 5 This is a schematic diagram of the capacitor module in the second embodiment of this application;

[0028] Figure 6 for Figure 5 Top view of the capacitor module;

[0029] Figure 7 for Figure 5 A cross-sectional view of the capacitor module along the CC direction;

[0030] Figure 8 for Figure 7 Enlarged schematic diagram of part D in the middle;

[0031] Figure 9 for Figure 8 A schematic diagram of the structure after removing the capacitor and nut;

[0032] Figure 10 This is a schematic diagram of the capacitor module in the third embodiment of this application;

[0033] Figure 11 for Figure 10 Left view of the capacitor module;

[0034] Figure 12 for Figure 10Top view of the capacitor module;

[0035] Figure 13 for Figure 10 A cross-sectional view of the capacitor module along the EE direction;

[0036] Figure 14 for Figure 13 Enlarged schematic diagram of section F in the middle;

[0037] Figure 15 for Figure 14 A schematic diagram of the structure after removing the capacitor and nut.

[0038] The reference numerals in the above figures are explained as follows:

[0039] 10 - Circuit board;

[0040] 20-Capacitor; 201-Connecting post; 202-Electrode; 203-Main body;

[0041] 30-Mounting base; 30a-Insertion hole section; 30a1-Large diameter hole section; 30a2-Small diameter hole section; 30b-Connecting hole; 301-Plate body; 302-Bent plate; 303-Support plate;

[0042] 40 - First wall section;

[0043] 50 - Insulation structure;

[0044] 60-nut;

[0045] 701 - First insulating pad; 702 - First insulating film; 703 - Second insulating film; 70a - First film portion; 70b - Second film portion; 704 - Second insulating pad; 705 - Third insulating pad; 706 - Fourth insulating pad; 7061 - Annular plate; 7062 - Cylindrical portion; 70621 - First protrusion; 707 - Fifth insulating pad; 7071 - Second protrusion. Detailed Implementation

[0046] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the capacitor module in the first embodiment of this application; Figure 2 for Figure 1 Top view of the capacitor module; Figure 3 for Figure 1 A cross-sectional view of the capacitor module along the AA direction.

[0048] The capacitor module in this embodiment includes a housing (only the first wall 40 of the housing is shown in the figure), a mounting base 30, and a capacitor 20. Both the mounting base 30 and the capacitor 20 are located inside the housing. The mounting base 30 is connected to the housing, and the connection method between the mounting base 30 and the housing is not limited; for example, it can be detachably fixed with fasteners or welded. The mounting base 30 can be connected to... Figure 3 The first wall portion 40 shown can also be connected to other locations on the housing. The capacitor 20 in this embodiment can be an electrolytic capacitor, which has a large capacitance; however, it can also be other types of capacitors 20. In some embodiments, the housing can be as follows: Figure 1 The square housing shown can house capacitors 20. The number of capacitors 20 can be multiple, meaning two or more. For example, multiple capacitors 20 can be arranged in an array inside the housing. Of course, the housing can also be other shapes or structures.

[0049] In this embodiment, capacitor 20 is mounted on mounting base 30, and mounting base 20 is connected to housing, which is equivalent to capacitor 20 being indirectly mounted inside housing. Specifically, in this embodiment, housing has a first wall portion 40, which is disposed opposite to one end of capacitor 20, and the height direction of capacitor 20 can be defined. Figure 3 The height direction of the capacitor 20 is also the vertical direction of the housing. The first wall portion 40 is the bottom wall portion of the housing located below the capacitor 20. The capacitor 20 includes a main body portion 203 and a connecting post 201. One end of the main body portion 203 of the capacitor 20 is provided with a connecting post 201 extending toward the first wall portion 40. The connecting post 201 is connected to the mounting base 30, which facilitates connection and fixation with the mounting base 30, so as to fix the capacitor 20 on the mounting base 30, thereby realizing the installation of the capacitor 20.

[0050] The housing is relatively large. Compared to installing multiple capacitors 20 one by one into the housing, assembling the capacitors 20 onto the mounting base 30 and then installing them into the housing facilitates the installation of the capacitors 20. For example, the aforementioned capacitor 20 can be an electrolytic capacitor. Compared to other types of capacitors, electrolytic capacitors have a larger capacitance but also a larger size and weight. Connecting them to the mounting base 30 via the connecting post 201 helps ensure the reliability of the connection. Moreover, the capacitors 20 can be pre-assembled onto the mounting base 30 and then assembled into the housing together, which improves assembly efficiency.

[0051] In one specific embodiment, the connecting post 201 can be a stud, and the capacitor module can be equipped with a nut. The nut and the stud are threaded together, thereby locking the nut to the mounting base 30, which in turn locks the capacitor 20 to the mounting base 30. This connection method is reliable and simple to operate, reliably installing the capacitor 20, improving safety, and preventing the capacitor 20 from shifting during transportation and operation, which could affect the electrical connection with the circuit board 10. For example, for a large and heavy capacitor 20, shifting of the capacitor 20 is more likely to cause a safety accident, and the nut assembly method is more reliable. Of course, the connecting post 201 can also be fixed to the mounting base 30 in other ways, such as interference fit, snap-fit ​​connection, or direct threaded connection to the mounting base 30, etc. This embodiment does not limit this method.

[0052] Please continue to refer to this. Figure 4 , Figure 4 for Figure 3 A magnified view of part B in the middle.

[0053] In this embodiment, the mounting base 30 is located between the main body 203 and the first wall 40 of the capacitor 20. The connecting post 201 of the capacitor 20 extends toward the first wall 40 to connect with the mounting base 30, but the connecting post 201 is spaced apart from the first wall 40, meaning that the capacitor 20 and the first wall 40 of the housing do not contact each other. The capacitor 20 also includes an electrode 202, which is disposed on the other end of the main body 203 of the capacitor 20 opposite to the connecting post 201. The electrode 202 can be connected to the circuit board 10 to achieve electrical connection. Since the end where the connecting post 201 is located is close to the same potential as the negative terminal of the capacitor 20, the connecting post 201 may be charged. For example, to ensure installation strength, the connecting post 201 is made of metal. By spaced apart from the first wall 40, the housing will not become charged due to contact with the connecting post 201. If operators come into contact with the casing, it can easily cause a safety accident. For example, for capacitor modules of high-voltage equipment, the casing can be touched after the power is off. However, if the connecting post 201 of capacitor 20 comes into contact with the casing, the casing may still be energized when the equipment is powered off. Insulating the connecting post 201 and the casing will prevent the casing from becoming energized due to contact with the connecting post 201.

[0054] Furthermore, the mounting base 30 is connected to the housing, and the connecting post 201 is connected to the mounting base 30. This is equivalent to an indirect connection between the connecting post 201 and the housing. Therefore, even if the connecting post 201 and the housing are spaced apart and do not contact each other, it is necessary to prevent the connecting post 201 from conducting electricity indirectly through the mounting base 30 and the housing. In other words, the connecting post 201 and the housing need to be insulated. In this way, the mounting base 30 serves as both a mounting structure between the capacitor 20 and the housing, making installation more convenient, and ensures insulation between the capacitor 20 and the housing, thereby improving the safety factor and preventing personnel from being electrocuted by contact with the housing.

[0055] As mentioned earlier, the connecting post 201 and the housing are indirectly connected via the mounting base 30. Therefore, the insulation between the connecting post 201 and the housing can be achieved by insulating the connecting post 201 from the mounting base 30. This way, even if the mounting base 30 and the housing are electrically conductive, the connecting post 201 can still be insulated from the housing. With this insulation method, the connection between the mounting base 30 and the connecting post 201 is relatively simple. Alternatively, the mounting base 30 can also be insulated from the housing. This way, even if the connecting post 201 and the mounting base 30 are electrically conductive, the connecting post 201 can still be insulated from the housing. The connecting post 201 is directly insulated from the mounting base 30. In this case, whether the mounting base 30 and the housing are insulated is not limited, the connection between the mounting base 30 and the housing is relatively simple, and the design of a relatively large housing can also be relatively simple.

[0056] In a specific embodiment, the connecting post 201 between the mounting base 30 and the capacitor 20 is insulated, such as... Figure 4 As shown, specifically, the mounting base 30 is provided with a socket portion 30a, and the connecting post 201 is inserted into the socket portion 30a and can directly contact the hole wall of the socket portion 30a. At this time, the socket portion 30a can be a through hole structure, in which case the connecting post 201 can pass through the socket portion 30a and be connected to the nut, or it can be connected to the pin by snap-fit, etc.

[0057] To achieve insulation between the connecting post 201 and the mounting base 30, at least the portion of the mounting base 30 in contact with the connecting post 201 must be made of insulating material. For example... Figure 3 As shown, in this embodiment, the mounting base 30 can be made entirely of insulating material. This ensures that after the connecting post 201 is inserted into the insertion hole 30a, there will be no electrical conductivity between the mounting base 30 and the housing, thus achieving insulation from the housing. Of course, only the wall of the insertion hole 30a of the mounting base 30 needs to be made of insulating material, but making the entire mounting base 30 of insulating material facilitates processing; for example, the mounting base 30 can be a one-piece injection molded part. Furthermore, as... Figure 4 As shown, the connecting post 201 of the capacitor 20 is inserted into the socket 30a. The end face of the main body 203 of the capacitor 20 can abut against one side surface of the mounting base 30 along the height direction of the capacitor 20. This can better support the capacitor 20 and facilitate locking the connecting post 201. If the side surface of the mounting base 30 facing the capacitor 20 is also made of insulating material, it can better ensure that the capacitor 20 and the shell are relatively insulated.

[0058] For example, such as Figure 3 As shown, the mounting base 30 is made of block-shaped plastic and has two side surfaces distributed along the height direction of the capacitor 20, namely a first side surface and a second side surface. Figure 3From a visual perspective, the first side surface is the upper surface, and the second side surface is the lower surface. The second side surface can be supported by the first wall portion 40 of the housing. The mounting base 30 has an insertion hole portion 30a that passes through the first side surface and the second side surface. Specifically, the insertion hole portion 30a is a stepped hole portion, which includes a large-diameter hole section 30a1 and a small-diameter hole section 30a2. The small-diameter hole section 30a2 is closer to the first side surface. The connecting post 201 passes through the small-diameter hole section 30a2 and can contact the hole wall of the small-diameter hole section 30a2. The part of the connecting post 201 that extends out of the small-diameter hole section 30a2 is located in the large-diameter hole section 30a1. At this time, the connecting post 201 can be, for example, a stud, so as to connect with a nut, thereby fixing the capacitor 20 and the mounting base 30. The large-diameter hole section 30a1 is convenient for accommodating the nut.

[0059] Here, the mounting base 30 is set to have a certain thickness, so that the bottom surface of the mounting base 30, that is, the second side surface, can support the housing and can also be machined with stepped holes to accommodate the connecting post 201 and the nut. That is, it can both support and set the required insertion hole 30a. For example, for the mounting base 30 of the injection molded part, this structure is conducive to processing.

[0060] The aforementioned insulation method between the connecting post 201 and the mounting base 30 involves setting at least the portion of the mounting base 30 in contact with the connecting post 201 as an insulating material. It is understood that other methods are also possible. For example, the capacitor module may include an insulating component, and at least an insulating component may be provided between the connecting post 201 and the hole wall of the insertion portion 30a of the mounting base 30, which can also achieve the purpose of insulation from the housing.

[0061] For details, please refer to the second and third embodiments below.

[0062] Please continue to refer to this. Figures 5 to 7 , Figure 5 This is a schematic diagram of the capacitor module in the second embodiment of this application; Figure 6 for Figure 5 Top view of the capacitor module; Figure 7 for Figure 5 A cross-sectional view of the capacitor module along the CC direction.

[0063] The second embodiment has a similar structure to the capacitor module in the first embodiment, also including a housing and a capacitor 20 and a mounting base 30 located inside the housing. The connecting post 201 of the capacitor 20 is connected to the mounting base 30, and the mounting base 30 is connected to the housing. The connecting post 201 and the first wall 40 of the housing are spaced apart, and the connecting post 201 and the housing are insulated from each other. The only difference is that the insulation method between the connecting post 201 of the capacitor 20 and the mounting base 30 in the second embodiment differs from that in the first embodiment.

[0064] You can continue to refer to this. Figure 8 and Figure 9 As shown, Figure 8 for Figure 5 Enlarged schematic diagram of part D in the middle; Figure 9 for Figure 5 A schematic diagram of the structure after removing capacitor 20 and nut 60.

[0065] The capacitor module may include an insulating component, which includes a first insulating pad 701. The first insulating pad 701 is the aforementioned insulating element and is located in the socket portion 30a, that is, the first insulating pad 701 fills the socket portion 30a. At this time, the socket portion 30a has a through-hole structure, and the connecting post 201 passes through the first insulating pad 701. That is, the first insulating pad 701 has an annular structure with a through-hole portion, and the connecting post 201 can pass through the first insulating pad 701. In this way, the first insulating pad 701 separates the connecting post 201 from the hole wall of the socket portion 30a, thus providing insulation.

[0066] The insulating assembly may further include an insulating film. The mounting base 30 has two side surfaces distributed along the extending direction of the socket portion 30a. In this embodiment, the extending direction of the socket portion 30a is parallel to the height direction of the capacitor 20. The two side surfaces can be defined as a first side surface and a second side surface, wherein the first side surface is... Figure 8 The upper surface is the middle surface, and the second side surface is the lower surface. Both sides of the mounting base 30 are provided with insulating films, which are defined as the first insulating film 702 and the second insulating film 703, respectively. The first insulating film 702 is provided on the upper surface, and the second insulating film 703 is provided on the lower surface.

[0067] Each insulating film includes a first film portion 70a and a second film portion 70b. The first film portion 70a covers at least a portion of the surface of the mounting base 30, and the second film portion 70b covers at least a portion of the surface of the first insulating pad 701. In a specific embodiment, the insulating film can be heat-pressed to the mounting base 30 and the first insulating pad 701, thus connecting the first insulating pad 701 and the mounting base 30 together. Of course, the connection between the insulating film and the mounting base 30 and the first insulating pad 701 is not limited to heat pressing; for example, it can be bonded with insulating adhesive. Heat pressing connection is a simple and reliable structure. This method of connecting the first insulating pad 701 and the mounting base 30 via an insulating film eliminates the need for a direct connection between the two. Furthermore, by placing the insulating film on the surface of the mounting base 30, the end face of the main body 203 of the capacitor 20 can be supported on the insulating film, providing further support for the capacitor 20 and maintaining insulation between the capacitor 20 and the mounting base 30. When the connecting post 201 is a stud, the mating nut can also abut against the second insulating film 703 on the lower surface of the mounting base 30 during tightening, thus providing insulation. Of course, the first insulating pad 701 is not limited to being connected to the mounting base 30 via an insulating film; it can also be connected by methods such as bonding or pressing.

[0068] like Figure 7 As shown, multiple capacitors 20 can be mounted simultaneously on the mounting base 30. The insulating film can be a single piece, allowing for multiple through-holes. These through-holes correspond one-to-one with the insertion holes 30a on the mounting base 30 and the through-holes on the first insulating pad 701. Projecting along the height of the capacitor 20, the projections of the corresponding through-holes on the insulating film, the insertion holes 30a on the mounting base 30, and the through-holes on the first insulating pad 701 can overlap. Therefore, depending on requirements, multiple first insulating films 702 and second insulating films 703, each corresponding to one of the multiple capacitors 20, can also be included.

[0069] In some embodiments, the insulating assembly may further include a second insulating pad 704 and a third insulating pad 705. The mounting base 30 has a second insulating pad 704 on one side of the insertion hole portion 30a extending in the direction of extension, and a third insulating pad 705 on the other side. The second insulating pad 704 covers at least a portion of the first film portion 70a of the corresponding first insulating film 702, and at least a portion of the second film portion 70b of the first insulating film 702. The third insulating pad 705 covers at least a portion of the first film portion 70a of the corresponding second insulating film 703, and at least a portion of the second film portion 70b of the second insulating film 703. Thus, a portion of the insulating film and at least a portion of the first insulating pad 701 are sandwiched between the second insulating pad 704 and the third insulating pad 705.

[0070] Figure 9 In the middle, each insertion hole 30a is respectively equipped with a set of second insulating pads 704 and third insulating pads 705. The second insulating pads 704 and third insulating pads 705 can be annular plates with through holes. The connecting post 201 can pass through the through holes of the second insulating pad 704, the first insulating film 702, the first insulating pad 701, the second insulating film 703, and the third insulating pad 705 in sequence.

[0071] As described above, the insulating film can connect the first insulating pad 701 and the mounting base 30. The insulating film is a relatively thin and flexible structure. Adding the second insulating pad 704 and the third insulating pad 705 can further support and clamp the first insulating pad 701, so that the first insulating pad 701 can be more reliably and stably located in the insertion hole 30a, thereby ensuring the insulation between the connecting post 201 and the mounting base 30 after the connecting post 201 is inserted into the insertion hole 30a.

[0072] The outer diameters of the second insulating pad 704 and the third insulating pad 705 are both larger than the outer diameter of the first insulating pad 701, so that they can cover the mounting base 30 and provide support for the first insulating pad 701.

[0073] like Figure 8As shown, the second insulating pad 704 can support the end face of the main body 203 of the capacitor 20, and the third insulating pad 705 can abut against the nut 60. The outer diameter of the nut 60 is smaller than the outer diameter of the main body 203. Therefore, in this embodiment, the outer diameter of the second insulating pad 704 can be larger than the outer diameter of the third insulating pad 705. Of course, the outer diameters of the second insulating pad 704 and the third insulating pad 705 are not limited to this.

[0074] When an insulating element is provided to insulate the mounting base 30 and the connecting post 201, the mounting base 30 does not need to be made of an insulating material as in the first embodiment. For example, the mounting base 30 can be made of an insulating material as in the first embodiment. Figure 7 The diagram shows a metal plate, which may have a through-hole 30a extending along its thickness direction. The metal plate may include a plate body 301, with the through-hole 30a disposed on the plate body 301. The metal plate may also include a bent plate 302 bent relative to the plate body 301. The thickness direction of the plate body 301 is parallel to the height direction of the capacitor 20. The bent plate 302 extends towards the first wall 40 to support the first wall 40 of the housing. For example, the bent plate 302 extends along the height direction of the capacitor 20. In this case, the extension height of the bent plate 302, i.e., the distance between the plate body 301 and the first wall 40, creates a space between the plate body 301 and the first wall 40. This allows the connecting post 201, after passing through the through-hole 30a, to be spaced apart from the first wall 40. When the connecting post 201 is a stud, this space can also accommodate a nut 60 that mates with the connecting post 201. As can be seen, the mounting base 30 in this embodiment can be formed by bending a single plate, which is simple in structure and has low processing cost. At this time, the connecting column 201 is locked with the nut 60. The metal plate does not need to be provided with threaded holes, and the insertion hole 30a can be a smooth hole. The metal plate can be a relatively thin plate, which is easy to process.

[0075] The metal plate may also include a support plate 303 connected to the bent plate 302. The support plate 303 is parallel to the plate body 301, that is, one end of the bent plate 302 is connected to the plate body 301, and the other end of the bent plate 302 is connected to the support plate 303. The plate body 301, the bent plate 302, and the support plate 303 can be an integral plate structure. The support plate 303 can increase the area supported on the first wall portion 40 of the housing, thereby improving the stability of the support. The support plate 303 can also provide more area for setting structures such as connecting holes 30b, so that the mounting base 30 and the housing can be fixed by fasteners inserted into the connecting holes.

[0076] Please continue to refer to this. Figures 10 to 13 , Figure 10 This is a schematic diagram of the capacitor module in the third embodiment of this application; Figure 11 for Figure 10 Left view of the capacitor module; Figure 12 for Figure 10Top view of the capacitor module; Figure 13 for Figure 10 A cross-sectional view of the capacitor module along the EE direction.

[0077] The third embodiment is similar in structure to the capacitor module in the second embodiment, also including a housing and a capacitor 20 and a mounting base 30 located inside the housing. The connecting post 201 of the capacitor 20 is connected to the mounting base 30, and the mounting base 30 is connected to the housing. The connecting post 201 and the first wall portion 40 of the housing are spaced apart, and the connecting post 201 and the housing are insulated from each other. The only difference is that the structure of the insulating component between the connecting post 201 of the capacitor 20 and the mounting base 30 in the second embodiment is different from that in the second embodiment.

[0078] You can continue to refer to this. Figure 14 and Figure 15 As shown, Figure 14 for Figure 13 Enlarged schematic diagram of section F in the middle; Figure 15 for Figure 14 A schematic diagram of the structure after removing capacitor 20 and nut 60.

[0079] The insulating components in this embodiment include a fourth insulating pad 706 and a fifth insulating pad 707. The insertion hole portion 30a of the mounting base 30 has a through-hole structure. At least a portion of at least one of the fourth insulating pad 706 and the fifth insulating pad 707 is located within the insertion hole portion 30a and abuts against the other. The portions of the fourth insulating pad 706 and the fifth insulating pad 707 located within the insertion hole portion 30a are insulating components. Figure 15 In the middle, the fifth insulating pad 707 is parallel to the plate body 301 of the mounting base 30, and a portion of the fourth insulating pad 706 is inserted into the socket portion 30a and docks with the fifth insulating pad 707. The portion of the fourth insulating pad 706 inserted into the socket portion 30a constitutes an insulating component.

[0080] The mounting base 30 has two side surfaces distributed along the extension direction of the insertion portion 30a or the height direction of the capacitor 20, namely a first side surface and a second side surface, at least a portion of the fourth insulating pad 706 covers the first side surface, and at least a portion of the fifth insulating pad 707 covers the second side surface.

[0081] Specifically, the fourth insulating pad 706 includes an annular plate 7061 and a cylindrical portion 7062 extending along the height direction from the inner edge of the annular plate 7061. The fifth insulating pad 707 is an annular plate generally parallel to the main body 301, and the cylindrical portion 7062 and the fifth insulating pad 707 are joined together in the height direction. At this time, portions of the annular plate 7061 and the fifth insulating pad 707 of the fourth insulating pad 706 respectively cover the first and second side surfaces. The annular plate 7061, located between the first side surface and the main body 203 of the capacitor 20, provides insulation while supporting the main body 203 of the capacitor 20. The portion of the fifth insulating pad 707 located on the second side surface can abut against the nut 60 for support and also provides insulation.

[0082] It is understood that the fifth insulating pad 707 may include a cylindrical portion that inserts into the socket portion 30a to mate with the fourth insulating pad 706, which is substantially parallel to the plate body 301. Alternatively, both the fourth insulating pad 706 and the fifth insulating pad 707 may be provided with cylindrical portions and inserted into the socket portion 30a to be spliced ​​together.

[0083] In some embodiments, the fourth insulating pad 706 and the fifth insulating pad 707 are irregularly shaped insulating pads, wherein one of the mating end faces of the fourth insulating pad 706 and the fifth insulating pad 707 is provided with at least one groove, and the other may be provided with a protrusion that mates with the groove, such as... Figure 15 The fourth insulating pad 706 shown has a first protrusion 70621, and the fifth insulating pad 707 has a second protrusion 7071. When there are more than two protrusions, a groove is formed between two adjacent protrusions, that is, the fourth insulating pad 706 and the fifth insulating pad 707 are interlocked. This can improve the reliability of the connection between the fourth insulating pad 706 and the fifth insulating pad 707, increase the creepage distance, and the fourth insulating pad 706 and the fifth insulating pad 707 can play a certain positioning role after docking, which is convenient for installation.

[0084] In the above embodiments, when the connecting post 201 is a stud, a nut 60 can be provided. In this case, the nut 60 can be made of insulating material to prevent it from contacting the housing and becoming conductive. The nut 60 and the first wall 40 of the housing can also be spaced apart. Alternatively, the nut 60 can be a metal nut, but since it will contact the mounting base 30, the nut 60 and the mounting base 30 are also insulated. For example, in the first embodiment, the mounting base 30 is made of insulating material, so it is also insulated from the nut 60; in the second embodiment, the nut 60 contacts the third insulating pad 705, thus it is insulated from the mounting base 30; continuing with the third embodiment, the nut 60 contacts the fifth insulating pad 707, so the nut 60 and the mounting base 30 are also relatively insulated. Of course, if the mounting base 30 is insulated from the housing, then the nut 60 must also be relatively insulated from the housing.

[0085] Furthermore, the structural form of the nut 60 is not limited. In the second embodiment, the nut 60 has a ring-shaped structure, and the connecting post 201 can extend out of the nut 60 or be located inside the nut 60. However, as long as the nut 60 is made of a conductive metallic material, the nut 60 and the first wall portion 40 are spaced apart. In the third embodiment, the nut 60 has a nut-like structure, and the connecting post 201 is located inside the nut 60. Similarly, the nut 60, which is also made of a conductive metallic material, needs to be spaced apart from the first wall portion 40. All these structural forms of the nut 60 can be applied to the first embodiment.

[0086] Furthermore, in the embodiments described above, the capacitor module may include an insulating structure 50. When the connecting post 201 passes through the mounting base 30, i.e., the insertion hole 30a is a through-hole structure, the insulating structure 50 is disposed between the connecting post 201 and the first wall portion 40. The insulating structure 50 is, for example, insulating paper, such as laying a layer of insulating paper or other insulating structure on the surface of the first wall portion 40 of the housing facing the capacitor 20. This can prevent the connecting post 201 or the metal nut connected to the connecting post 201 from contacting the housing and conducting electricity due to installation or processing errors.

[0087] This application also provides an energy storage converter, which includes the capacitor module described in any of the above embodiments and has the same technical effects as the capacitor module. The capacitor module can be disposed within the housing of the energy storage converter. As mentioned above, the capacitor module can be an electrolytic capacitor with a large capacity, for example, up to several hundred millifarads.

[0088] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A capacitor module, characterized in that, include: case; Mounting base (30), the mounting base (30) is located inside the housing, and the mounting base (30) is connected to the housing; A capacitor (20) is located inside the housing and is mounted on the mounting base (30). The capacitor (20) is spaced apart from the wall of the housing and is insulated from the housing.

2. The capacitor module according to claim 1, characterized in that, The capacitor (20) and the mounting base (30) are insulated from each other so that the capacitor (20) is insulated from the housing; or, the mounting base (30) and the housing are insulated from each other so that the capacitor (20) is insulated from the housing.

3. The capacitor module according to claim 2, characterized in that, The housing includes a first wall portion (40), one end of the capacitor (20) is provided with a connecting post (201) extending toward the first wall portion (40), and the mounting base (30) is provided with a socket portion (30a), and the connecting post (201) is inserted into the socket portion (30a). An insulating element is provided between at least the connecting post (201) and the hole wall of the insertion portion (30a); or the connecting post (201) and the hole wall of the insertion portion (30a) are in direct contact, and at least the part of the mounting base (30) in contact with the connecting post (201) is made of insulating material.

4. The capacitor module according to claim 3, characterized in that, The capacitor module includes an insulating component, which includes a first insulating pad (701), which is the insulating element; the first insulating pad (701) is located in the socket portion (30a), which is a through hole structure, and the connecting post (201) passes through the first insulating pad (701). The insulating assembly further includes a first insulating film (702) and a second insulating film (703). The mounting base (30) has two side surfaces distributed along the extension direction of the insertion hole (30a). The first insulating film (702) is disposed on one side surface, and the second insulating film (703) is disposed on the other side surface. The first insulating film (702) and the second insulating film (703) each include a first film portion (70a) and a second film portion (70b). The first film portion (70a) covers at least a portion of the surface of the mounting base (30), and the second film portion (70b) covers at least a portion of the surface of the first insulating pad (701).

5. The capacitor module according to claim 4, characterized in that, The insulating film, the mounting base (30), and the first insulating pad (701) are heat-pressed together or bonded together with insulating adhesive.

6. The capacitor module according to claim 4, characterized in that, The insulating assembly further includes a second insulating pad (704) and a third insulating pad (705). The mounting base (30) is provided with the second insulating pad (704) on one side and the third insulating pad (705) on the other side along the extension direction of the insertion hole (30a). The second insulating pad (704) and the third insulating pad (705) both cover at least a portion of the surface of the first membrane portion of the insulating film and at least a portion of the surface of the second membrane portion of the insulating film.

7. The capacitor module according to claim 4, characterized in that, The insulating assembly includes a fourth insulating pad (706) and a fifth insulating pad (707), and the insertion hole (30a) is a through hole structure; Of the fourth insulating pad (706) and the fifth insulating pad (707), at least a portion of at least one is located within the socket portion (30a) and is mated with the other, and the portions of the fourth insulating pad (706) and the fifth insulating pad (707) located within the socket portion (30a) are the insulating components.

8. The capacitor module according to claim 7, characterized in that, The mounting base (30) has two sides distributed along the extension direction of the insertion hole (30a), at least a portion of the fourth insulating pad (706) is disposed on one side of the mounting base (30), and at least a portion of the fifth insulating pad (707) is disposed on the other side of the mounting base (30).

9. The capacitor module according to claim 7 or 8, characterized in that, The end faces of the fourth insulating pad (706) and the fifth insulating pad (707) that meet each other are provided with at least one groove on one side and a protrusion that mates with the groove on the other side.

10. The capacitor module according to any one of claims 3-8, characterized in that, The socket portion (30a) is a through hole structure, the connecting post (201) is a stud, and the capacitor module also includes a nut (60). The portion of the connecting post (201) that passes through the socket portion (30a) is connected to the nut (60).

11. The capacitor module according to claim 10, characterized in that, The nut (60) is made of insulating material; or, the nut (60) is a metal nut, the metal nut and the first wall portion (40) are spaced apart, and the metal nut and the housing are insulated from each other.

12. The capacitor module according to claim 10, characterized in that, The capacitor module also includes an insulating structure (50) disposed between the connecting post (201) and the first wall portion (40).

13. An energy storage converter, characterized in that, Includes the capacitor module as described in any one of claims 1-12.

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