Quick-plug type composite busbar

Abstract

The invention relates to the technical field of composite busbars, and discloses a quick-plug type composite busbar which comprises a power composite busbar, a high-voltage connector and a capacitor composite busbar. The power composite busbar is provided with a connecting plug, and the connecting plug is inserted and clamped in the high-voltage connector. The capacitor composite busbar is provided with an external interface, and the external interface is fixedly connected to the bottom of the high-voltage connector. According to the quick-plug type composite busbar, the external interface of the composite busbar has a quick plugging function, and meanwhile, the quick-plug type composite busbar is simple to disassemble and maintain, so that the maintenance period of the functional module is shortened, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of composite busbars, in particular to a quick-plug composite busbar. Background Art

[0002] As a high-end power electronic connector, the composite busbar is widely used in rail transit, electric power, new energy and other industries, especially in the high-voltage field of rail transit. Usually, the composite busbar is connected with core electronic components such as heat sink, IGBT, diode, capacitor, etc. to form a functional module. The composite busbar is provided with an external connection terminal, which can be electrically connected to other functional modules through the external connection terminal to form a larger and more complex circuit.

[0003] In terms of external connection, the traditional method is to use screws, bolts and other fasteners for fastening. Although this connection method is simple and reliable, it is difficult to disassemble and maintain. When a functional module needs to be disassembled for maintenance, it is often necessary to disassemble the remaining modules before completing the operation, which prolongs the maintenance cycle and increases the maintenance cost. Summary of the invention

[0004] The main purpose of the present invention is to provide a quick-plug composite busbar, aiming to solve the technical problem that the existing integrated composite busbar is difficult to disassemble and maintain.

[0005] To achieve the above-mentioned purpose, the present invention provides a quick-plug composite busbar, comprising: a power composite busbar, a high-voltage connector and a capacitor composite busbar; the power composite busbar is provided with a plug connector, and the plug connector is inserted and engaged inside the high-voltage connector; the capacitor composite busbar is provided with an external interface, and the external interface is fixedly connected to the bottom of the high-voltage connector.

[0006] Preferably, the high-voltage connector includes an outer shell and a connection seat, and the connection seat is arranged in the outer shell; the connection seat includes an insulating base and two connection blocks, and the insulating base is arranged between the two connection blocks; the plug connector of the power composite busbar is inserted and engaged on the insulating base, and the two sides of the plug connector are respectively in contact with the connection blocks on the corresponding sides; the two external interfaces of the capacitor composite busbar are respectively connected to one of the connection blocks.

[0007] Preferably, two L-shaped extensions are provided at the bottom of the connecting seat.

[0008] Preferably, the high-voltage connector is welded or bonded to an external interface of the capacitor composite busbar.

[0009] Preferably, the extension portion of the high-voltage connector is connected to the external interface of the capacitor composite busbar via a fastening assembly.

[0010] Preferably, a positioning hole is provided on the extension portion, a ejector pin is provided on the external interface, the fastening assembly comprises a nut, a spring washer and a flat washer, and after the ejector pin is inserted into the positioning hole, the flat washer, the spring washer and the nut are installed in sequence.

[0011] Preferably, two sides of the plug connector are symmetrically provided with metal exposed parts, and the two connecting blocks are both provided with spring sheets for abutting against the metal exposed parts.

[0012] Preferably, the power composite busbar and the capacitor composite busbar are flat plate structures or bent structures.

[0013] Preferably, the power composite busbar and the capacitor composite busbar both include an upper insulating layer, a lower insulating layer and a conductor layer arranged between the upper insulating layer and the lower insulating layer.

[0014] Preferably, a positive terminal and a negative terminal are led out from one side of the power composite busbar.

[0015] The quick-plug composite busbar of the present invention has the following beneficial effects:

[0016] 1) The quick-plug composite busbar of the present invention is provided with a high-voltage connector, one end of which is connected to the external interface of the capacitor composite busbar, and the other end is plugged into the power composite busbar, so that the external interface of the composite busbar has a quick plug-in function, and the disassembly and maintenance are simple, which effectively shortens the maintenance cycle of the functional module and reduces the maintenance cost;

[0017] 2) The quick-plug composite busbar of the present invention can form a reliable electrical connection loop through the coordinated work of the capacitor composite busbar, the high-voltage connector and the power composite busbar, thereby improving the stability of current transmission;

[0018] 3) When designing equipment that includes quick-plug composite busbars, there is no need to reserve space for disassembly operations, which provides strong support for the miniaturization of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the assembly of a quick-plug composite busbar in one embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a quick-plug composite busbar in one embodiment of the present invention;

[0022] Figure 3 for Figure 1 Exploded diagram of the medium quick-plug composite busbar;

[0023] Figure 4 for Figure 1 Rotated section view at DD;

[0024] Figure 5 for Figure 4 A local enlarged schematic diagram at point A in the figure.

[0025] The serial numbers in the figure are explained as follows:

[0026] 1. Power composite busbar; 101. Plug connector; 1011. Exposed metal part; 102. Positive terminal; 103. Negative terminal; 2. High-voltage connector; 201. Outer shell; 202. Connecting seat; 2021. Insulating base; 2022. Connecting block; 203. Extension part; 204. Reed; 205. Holding part; 3. Capacitor composite busbar; 301. External interface; 3011. Ejector pin; 4. Fastening assembly; 401. Nut; 402. Spring washer; 403. Flat washer. DETAILED DESCRIPTION

[0027] In order to better understand the above technical solution, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0028] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0029] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like in the embodiments of the present invention indicate orientations or positional relationships based on the coordinate system shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] The present invention provides a quick-plug composite busbar, referring to Figures 1 to 3 In one embodiment, the quick-plug composite busbar includes: a power composite busbar 1, a high-voltage connector 2 and a capacitor composite busbar 3; the power composite busbar 1 is provided with a plug connector 101, and the plug connector 101 is inserted and engaged in the interior of the high-voltage connector 2; the capacitor composite busbar 3 is provided with an external interface 301, and the external interface 301 is fixedly connected to the bottom of the high-voltage connector 2.

[0033] In this embodiment, the power composite busbar 1 is composed of an intermediate conductor material and a surface insulating material, and one end of the power composite busbar 1 that exposes a portion of the conductor serves as a plug connector 101, and the plug connector 101 is inserted and engaged in the high-voltage connector 2 to form a current loop with the high-voltage connector 2. Optionally, the intermediate conductor material includes, but is not limited to, copper and pure aluminum, etc., for current conduction; the surface insulating material includes, but is not limited to, PET (polyethylene terephthalate) and PI (polyimide), etc.

[0034] The high-voltage connector 2 is plugged into the power composite busbar 1 and fastened to the capacitor composite busbar 3 to form a conductive loop. The connection methods used by the high-voltage connector 2 and the capacitor composite busbar 3 include but are not limited to welding, hexagon socket screw connection, and pin connection.

[0035] The capacitor composite busbar 3 is composed of an intermediate conductor material and a surface insulating material. Part of the conductor is exposed on the capacitor composite busbar 3 as an external interface 301, and the external interface 301 is connected to the high-voltage connector 2 using any of the above connection methods to form an electrical connection loop.

[0036] In summary, the quick-plug composite busbar of this embodiment has the following beneficial effects:

[0037] 1) The quick-plug composite busbar of this embodiment is provided with a high-voltage connector 2, one end of which is connected to the external interface 301 of the capacitor composite busbar 3, and the other end is plugged into the power composite busbar 1, so that the external interface 301 of the composite busbar has a quick plug-in function, and the disassembly and maintenance are simple, which effectively shortens the maintenance cycle of the functional module and reduces the maintenance cost;

[0038] 2) The quick-plug composite busbar of this embodiment can form a reliable electrical connection loop through the coordinated work of the power composite busbar 1, the high-voltage connector 2 and the capacitor composite busbar 3, thereby improving the stability of current transmission;

[0039] 3) The quick-plug composite busbar of this embodiment has the advantage of withstanding high pressure. When designing equipment including the quick-plug composite busbar, there is no need to reserve space for disassembly operations, which provides strong support for miniaturization of equipment.

[0040] In a preferred embodiment, reference Figure 4 and Figure 5 The high-voltage connector 2 includes an outer shell 201 and a connection seat 202, and the connection seat 202 is arranged in the outer shell 201; the connection seat 202 includes an insulating base 2021 and two connection blocks 2022, and the insulating base 2021 is arranged between the two connection blocks 2022; the plug connector 101 of the power composite busbar 1 is inserted on the insulating base 2021, and the two sides of the plug connector 101 are respectively in contact with the connection blocks 2022 on the corresponding sides; the two external interfaces 301 of the capacitor composite busbar 3 are respectively connected to one of the connection blocks 2022.

[0041] In this embodiment, the outer shell 201 can be formed by splicing and assembling four side panels, or can be formed in one piece, and both the upper and lower ends of the outer shell 201 are open. Figure 1 and Figure 2 The outer shell 201 is symmetrically provided with a holding portion 205 , and the holding portion 205 is provided to facilitate the operator to accurately match and install the high-voltage connector 2 with each composite busbar.

[0042] The connection base 202 is installed inside the outer shell 201, and one end thereof extends out of the outer shell 201 and is fixedly connected to the external interface 301 of the capacitor composite busbar 3. The connection base 202 is composed of an insulating base 2021 and two connection blocks 2022 symmetrically arranged on both sides of the insulating base 2021. The two connection blocks 2022 are made of metal, preferably aluminum. It is understandable that the insulating base 2021 and the connection blocks 2022 on both sides thereof can form an upwardly open slot structure, and the slot is adapted to the size and shape of the plug connector 101 of the power composite busbar 1. When in use, the plug connector 101 of the power composite busbar 1 is inserted into the slot and is limited by the insulating base 2021 at the bottom. The connection base 202 of this embodiment ensures the stability of the electrical connection by setting the connection block 2022 made of metal material, and realizes electrical isolation by setting the insulating base 2021.

[0043] The cross-sectional shape of the insulating base 2021 is in the shape of a "one" or Figure 4 The insulating base 2021 is in an inverted "T" shape, and is connected to the connecting blocks 2022 on both sides by crimping. Preferably, the cross-sectional shape of the insulating base 2021 is in an inverted "T" shape, and protrusions are provided on both sides of the insulating base 2021. Correspondingly, the inner side of the connecting block 2022 is provided with grooves adapted to the protrusions, and the protrusions of the insulating base 2021 are clamped in the grooves of the connecting block 2022. This arrangement can improve the structural stability of the connecting base 202.

[0044] Further, refer to Figure 4 and Figure 5 , a limiting groove is provided on the insulating base 2021. At this time, the front end of the plug connector 101 of the power composite busbar 1 is inserted into the limiting groove of the insulating base 2021 in the connecting base 202, and the exposed conductor on the plug connector 101 contacts the connecting block 2022 on the corresponding side of the connecting base 202 to form a current loop.

[0045] In summary, the high-voltage connector 2 of this embodiment, by providing an outer shell 201 and a connecting seat 202, can realize the quick plug-in of the power composite busbar 1 and the tight connection of the capacitor composite busbar 3, ensuring that the power composite busbar 1 and the capacitor composite busbar 3 form a reliable electrical connection circuit. At the same time, by providing an insulating base 2021, the creepage distance between the positive and negative poles of the power composite busbar 1 can be increased.

[0046] In a preferred embodiment, reference Figure 4 and Figure 5 The bottom of the connecting seat 202 is provided with two L-shaped extension parts 203 .

[0047] In this embodiment, two parallel external interfaces 301 are provided on the capacitor composite busbar 3, and each external interface 301 is respectively connected to an L-shaped extension portion 203. In this embodiment, by providing a connection seat 202 with an L-shaped extension portion 203, the electrical connection reliability between the high-voltage connector 2 and the capacitor composite busbar 3 can be improved.

[0048] It should be noted that, in other embodiments, the extension portion 203 at the bottom of the connection seat 202 may also be a straight plate. In this case, it is only necessary to ensure that the thickness of the straight plate is compatible with the width of the external interface 301 .

[0049] In a preferred embodiment, the high voltage connector 2 is welded or bonded to the external interface 301 of the capacitor composite busbar 3 .

[0050] More specifically, when a blind hole is not provided at the bottom of the connection seat 202 in the high-voltage connector 2, and the external interface 301 of the capacitor composite busbar 3 is not provided with a pin 3011, the bottom of the connection seat 202 and the external interface 301 are fixed by welding to form an electrical connection loop; when a blind hole is provided at the bottom of the connection seat 202 in the high-voltage connector 2, and the external interface 301 of the capacitor composite busbar 3 is provided with a pin 3011, the blind hole on the connection seat 202 and the pin 3011 on the external interface 301 can be matched and bonded and fixed by a conductive adhesive (such as silver glue) to form an electrical connection loop.

[0051] It is understandable that the high voltage connector 2 and the capacitor composite busbar 3 are fixed by welding or bonding to ensure that an effective electrical connection loop is formed between the two. It should be noted that the connection method of this embodiment is applicable to a high voltage connector 2 with a planar structure.

[0052] In a preferred embodiment, the extension portion 203 of the high voltage connector 2 is connected to the external interface 301 of the capacitor composite busbar 3 via a fastening assembly 4 .

[0053] In this embodiment, the fastening assembly 4 can be a bolt and nut combination, a riveting assembly, etc. At this time, the two L-shaped extensions 203 symmetrically arranged at the bottom of the high-voltage connector 2 are fastened and connected to the two external interfaces 301 arranged in parallel on the capacitor composite busbar 3 through a plurality of fastening assemblies 4 respectively.

[0054] Further, refer to Figure 3 and Figure 5 A positioning hole is provided on the extension portion 203, a ejector pin 3011 is provided on the external interface 301, and the fastening assembly 4 includes a nut 401, a spring washer 402 and a flat washer 403. After the ejector pin 3011 is inserted into the positioning hole, the flat washer 403, the spring washer 402 and the nut 401 are installed in sequence.

[0055] That is, the fastening assembly 4 is composed of a flat washer 403, a spring washer 402 and a nut 401. The extension portion 203 is provided with a plurality of positioning holes for inserting the ejector pin 3011. The number of the positioning holes is set according to the width of the power composite busbar 1. For example, Figure 1 In the embodiment, the number of the positioning holes is set to 5. It should be noted that the connection method of this embodiment is applicable to a high-voltage connector 2 with an L-shaped structure.

[0056] In a preferred embodiment, reference Figure 4 and Figure 5 The two sides of the plug connector 101 are symmetrically provided with metal exposed parts 1011 , and the inner sides of the two connection blocks 2022 are symmetrically provided with spring pieces 204 for abutting against the metal exposed parts 1011 .

[0057] In this embodiment, the metal exposed parts 1011 are symmetrically arranged on both sides of the plug connector 101 of the power composite busbar 1, and the metal exposed parts 1011 are 10 to 20 mm away from the front end of the plug connector 101. Reeds 204 are embedded in the inner sides of the two connection blocks 2022 in the connection seat 202 at the positions corresponding to the metal exposed parts 1011. At this time, when the plug connector 101 of the power composite busbar 1 is inserted into the slot in the connection seat 202, the reeds 204 on both sides of the plug connector 101 are tightly abutted against the metal exposed parts 1011 on the corresponding sides, thereby forming a reliable current loop between the power composite busbar 1 and the high-voltage connector 2, and at the same time, the power composite busbar 1 is effectively prevented from shifting in cooperation with the insulating base 2021, thereby improving the connection stability.

[0058] Optionally, the metal exposed portion 1011 is a tin-plated copper piece.

[0059] In a preferred embodiment, the power composite busbar 1 and the capacitor composite busbar 3 are flat plate structures or bent structures.

[0060] In this embodiment, the structural shapes of the power composite busbar 1 and the capacitor composite busbar 3 are mainly based on factors such as space layout and equipment requirements. For example, large equipment often needs to carry large currents, and large-area flat busbars can meet their requirements for current transmission; small equipment has compact internal space and complex structure, and bent busbars can better adapt to the internal structure of small equipment.

[0061] Furthermore, the power composite busbar 1 and the capacitor composite busbar 3 both include an upper insulating layer, a lower insulating layer, and a conductor layer disposed between the upper insulating layer and the lower insulating layer.

[0062] That is, the power composite busbar 1 mainly includes an upper insulating layer, a conductor layer and a lower insulating layer which are stacked. The upper insulating layer and the lower insulating layer are both made of insulating material (preferably PET) to insulate the surface of the power composite busbar 1; the conductor layer is made of conductive material (preferably T2 copper) for transmitting current. Furthermore, the conductor layer of the power composite busbar 1 is also provided with insulating blocks for insulation and pads for conduction, and the insulating blocks and pads are arranged at intervals.

[0063] The structure of the capacitor composite busbar 3 is similar to that of the power composite busbar 1. It should be noted that the power composite busbar 1 and the capacitor composite busbar 3 can be a stacked busbar structure with three or more layers. When the composite busbars 1 and 3 are stacked busbar structures with more than three layers, they can contain multiple conductor layers, and each conductor layer is isolated by an insulating layer.

[0064] Further, refer to Figure 3 A positive terminal 102 and a negative terminal 103 are led out from one side of the power composite busbar 1 .

[0065] That is, one side of the power composite busbar 1 from which the positive terminal 102 and the negative terminal 103 are led is preferably an end away from the plug connector 101, the positive terminal 102 is used to input a positive DC voltage, and the negative terminal 103 is used to input a reverse DC voltage. It is understandable that the power composite busbar 1 of this embodiment can be connected to core electronic components such as a heat sink and a diode through the positive terminal 102 and the negative terminal 103, and then combined to form a functional module.

[0066] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A quick-plug composite busbar, characterized in that: include: A power composite busbar (1), a high-voltage connector (2) and a capacitor composite busbar (3); the power composite busbar (1) is provided with a plug connector (101), the plug connector (101) is inserted and engaged in the interior of the high-voltage connector (2); the capacitor composite busbar (3) is provided with an external interface (301), the external interface (301) is fixedly connected to the bottom of the high-voltage connector (2).

2. The quick-plug composite busbar according to claim 1, characterized in that: The high-voltage connector (2) comprises an outer shell (201) and a connection seat (202), wherein the connection seat (202) is arranged inside the outer shell (201); the connection seat (202) comprises an insulating base (2021) and two connection blocks (2022), wherein the insulating base (2021) is arranged between the two connection blocks (2022); the plug connector (101) of the power composite busbar (1) is plugged into the insulating base (2021), and the two side edges of the plug connector (101) are respectively in contact with the connection blocks (2022) on the corresponding sides; and the two external interfaces (301) of the capacitor composite busbar (3) are respectively connected to one of the connection blocks (2022).

3. The quick-plug composite busbar according to claim 2, characterized in that: Two L-shaped extension parts (203) are arranged at the bottom of the connection seat (202).

4. The quick-plug composite busbar according to any one of claims 1 to 3, characterized in that: The high-voltage connector (2) is welded or bonded to the external interface (301) of the capacitor composite busbar (3).

5. The quick-plug composite busbar according to claim 3, characterized in that: The extension portion (203) of the high-voltage connector (2) is connected to the external interface (301) of the capacitor composite busbar (3) via a fastening assembly (4).

6. The quick-plug composite busbar according to claim 5, characterized in that: The extension portion (203) is provided with a positioning hole, the external interface (301) is provided with a ejector pin (3011), the fastening assembly (4) comprises a nut (401), a spring washer (402) and a flat washer (403), and after the ejector pin (3011) is inserted into the positioning hole, the flat washer (403), the spring washer (402) and the nut (401) are installed in sequence.

7. The quick-plug composite busbar according to claim 2, characterized in that: The two sides of the plug connector (101) are symmetrically provided with metal exposed parts (1011), and the inner sides of the two connection blocks (2022) are both provided with spring sheets (204) for abutting against the metal exposed parts (1011).

8. The quick-plug composite busbar according to claim 1, characterized in that: The power composite busbar (1) and the capacitor composite busbar (3) are flat plate structures or bent structures.

9. The quick-plug composite busbar according to claim 1, characterized in that: The power composite busbar (1) and the capacitor composite busbar (3) both comprise an upper insulating layer, a lower insulating layer and a conductor layer arranged between the upper insulating layer and the lower insulating layer.

10. The quick-plug composite busbar according to claim 1, characterized in that: A positive terminal (102) and a negative terminal (103) are led out from one side of the power composite busbar (1).

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