Metal cover plate shielding structure

Abstract

The utility model relates to a metal cover plate shielding structure which is composed of a low-voltage direct-current cover plate, a high-voltage alternating-current cover plate, a shell, a low-voltage direct-current copper bar and a high-voltage alternating-current assembly. The high-voltage alternating-current component is assembled in the isolation cavity in the shell; the high-voltage alternating-current cover plate is assembled on the shell, and the high-voltage alternating-current assembly is positioned in a closed space by the high-voltage alternating-current cover plate and the isolation cavity; the low-voltage direct-current cover plate is assembled above the low-voltage direct-current copper bar and connected with the shell; the bottom plate, the two partition plates, the front side plate and the low-voltage direct-current cover plate of the shell enable the low-voltage direct-current copper bar to be located in the closed space. According to the utility model, the two metal cover plates are assembled and matched with the shell, and the high-voltage alternating current circuit and the low-voltage direct current circuit are respectively isolated in the two closed cavities to form an absolute shielding structure. The high-voltage circuit and the low-voltage circuit can be shielded, mutual interference between a high-voltage electromagnetic field and a low-voltage electromagnetic field is reduced, the high-voltage circuit and the low-voltage circuit can be shielded from the external environment, and mutual interference between the high-voltage circuit and the low-voltage circuit and the external environment electromagnetic field is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle-mounted electronic structures, and particularly relates to a metal cover plate shielding structure. Background Art

[0002] Existing on-board power products all have complex electromagnetic environments where high-voltage and low-voltage electromagnetic fields are coupled. In product design and layout, the high-voltage circuit area is often isolated from the low-voltage circuit area to eliminate the electromagnetic interference of the electromagnetic field generated by the high-voltage circuit on the low-voltage circuit, but this will affect the accuracy of the data.

[0003] As new energy vehicle components become increasingly miniaturized, power density requirements are increasing. This inevitably leads to smaller gaps between high-voltage and low-voltage circuits, or even crossovers between them, in the layout of onboard power products. These circuits are susceptible to interference from ambient electromagnetic fields, which can degrade system performance and cause product malfunctions. Therefore, the development of a metal cover shielding structure is necessary to effectively address this issue. Summary of the Invention

[0004] The purpose of this utility model is to provide a metal cover shielding structure to solve the problem of poor electromagnetic shielding effect caused by structural defects in the layout of existing new energy vehicle on-board power products.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A metal cover shielding structure, consisting of a low-voltage DC cover 1, a high-voltage AC cover 2, a shell 3, a low-voltage DC copper busbar 4, and a high-voltage AC component 5;

[0007] The housing 3 includes left and right side panels, front and rear side panels, two partitions arranged inside the housing, and a bottom panel;

[0008] The left side plate, the front side plate, the first partition plate and the bottom plate form an isolation cavity; the high-voltage AC component 5 is assembled in the isolation cavity and fixed to the shell 3;

[0009] The high-voltage AC cover plate 2 is fastened and assembled on the housing 3, and together with the isolation cavity forms a first shielding structure, so that the high-voltage AC component 5 is in a closed space;

[0010] The front end of the low-voltage DC copper busbar 4 is assembled in the middle slot of the front side plate of the housing 3;

[0011] The low-voltage DC cover plate 1 is assembled above the low-voltage DC copper busbar 4 and fixed to the housing 3; the bottom plate of the housing 3, the first partition plate, the second partition plate, the front side plate of the housing 3 and the low-voltage DC cover plate 1 form a second shielding structure, so that the low-voltage DC copper busbar 4 is also in a closed space;

[0012] The rear side of the housing 3 is further provided with a connector fixed on the housing 3 , on which a connecting bolt is installed to be threadedly connected to the end of the low-voltage DC copper bus 4 .

[0013] Furthermore, a bolt connection column is respectively provided at the connection between the left and right side panels and the front side panel; a bolt connection column is provided in the middle of the front side panel; two bolt connection columns are provided behind the first partition panel; and one bolt connection column is provided in front and behind the second partition panel.

[0014] Furthermore, the front end of the high-voltage AC component 5 is assembled in the isolation cavity and fixed to the shell 3 by bolts, and the terminal wiring harness extends out from the U-shaped opening in the middle of the shell.

[0015] Furthermore, the high-voltage AC cover plate 2 is screwed to three bolt connection columns through three bolts.

[0016] Furthermore, the thickness of the high-voltage AC cover plate 2 is reduced to 1 mm.

[0017] Furthermore, reinforcing ribs are provided at the bending parts and the easily deformed surface of the high-voltage AC cover plate 2 .

[0018] Furthermore, the front end connection hole of the low-voltage DC copper busbar 4 extends out of the card slot.

[0019] Furthermore, the low-voltage DC cover plate 1 is screwed to four bolt connection columns through four bolts, so that the low-voltage DC cover plate 1 is connected and fastened to the housing 3 .

[0020] Furthermore, the left and right side panels, the front side panel, the two partitions and the bottom panel arranged in the shell, and the rear connecting end of the shell 3 are integrally formed by die casting.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The utility model provides a high-performance closed metal cover shielding structure, which can avoid electromagnetic interference between the high-voltage circuit and the low-voltage circuit when the high-voltage circuit and the low-voltage circuit are arranged crosswise; the utility model adopts an aluminum plate of smaller thickness and adds reinforcing ribs to greatly meet the dual challenges of lightness and high strength of current new energy vehicles; the utility model adopts a fixing method of screwing the metal cover to the shell by bolts, which is simple and quick to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic structural diagram of the metal cover shielding structure of the utility model;

[0025] Figure 2 Schematic diagram of high voltage AC shielding structure;

[0026] Figure 3 Schematic diagram of low-voltage DC copper busbar assembly structure;

[0027] Figure 4 Schematic diagram of low-voltage DC shielding structure.

[0028] In the figure, 1. Low-voltage DC cover plate 2. High-voltage AC cover plate 3. Housing 4. Low-voltage DC copper busbar 5. High-voltage AC components. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the embodiments:

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0031] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of this utility model, the terms "first", "second", etc. are used only to distinguish the description and should not be understood as indicating or implying relative importance.

[0032] like Figure 1 As shown, the metal cover shielding structure of the present invention is composed of a low-voltage DC cover 1, a high-voltage AC cover 2, a shell 3, a low-voltage DC copper bus 4 and a high-voltage AC component 5.

[0033] The housing 3 includes left and right side panels, front and rear side panels, two internally mounted partitions, and a bottom panel. A bolted connection post is provided at the junction of each of the left and right side panels with the front side panel. A bolted connection post is provided in the middle of the front side panel. Two bolted connection posts are provided behind the first partition panel. One bolted connection post is provided at the front and rear of the second partition panel.

[0034] The left side panel, front and rear side panels, first partition, and bottom panel form an isolation chamber. The front end of the high-voltage AC component 5 is assembled in the isolation chamber and fixed to the housing 3 by bolts. The terminal wiring harness extends from the U-shaped opening in the middle of the housing.

[0035] The high-voltage AC cover plate 2 is screwed to three bolt connection columns through three bolts, and the high-voltage AC cover plate 2 is fastened and assembled on the shell 3, and together with the isolation cavity, it forms a first shielding structure, so that the high-voltage AC component 5 is in a closed space, reducing the risk of mutual interference with the surrounding environment of the circuit.

[0036] To reduce overall weight and achieve lightweight design, the thickness of the high-voltage AC cover plate 2 has been reduced to 1mm. However, due to its complex structure, the high-voltage AC cover plate 2 is prone to deformation during assembly and use, affecting assembly clearance and safety distances. The present invention adds reinforcing ribs at the bends and easily deformed surfaces of the high-voltage AC cover plate 2, significantly reducing the risk of deformation and maximizing shielding effectiveness.

[0037] The front end of the low-voltage DC copper busbar 4 is mounted in a slot on the front side panel of the housing 3. Specifically, the front connection hole of the low-voltage DC copper busbar 4 extends from the slot located in the middle of the front side panel. Thanks to the presence of the high-voltage AC cover plate 2, even if the high-voltage AC components 5 and the low-voltage DC copper busbar 4 are spatially arranged in a cross-sectional configuration, the high-voltage AC circuit and the low-voltage DC circuit are still isolated, forming a mutual shielding structure and reducing mutual electromagnetic interference.

[0038] The low-voltage DC cover plate 1 is assembled above the low-voltage DC copper busbar 4 and fastened to the housing 3 via four bolts threaded onto four bolt connection posts. The bottom plate, first and second baffles, the front panel of the housing 3, and the low-voltage DC cover plate 1 form a second shielding structure, enclosing the low-voltage DC copper busbar 4 within a closed space. This reduces electromagnetic interference between the high-voltage AC circuit and the low-voltage DC circuit, as well as electromagnetic interference between the low-voltage DC circuit and the rest of the environment.

[0039] The rear side of the housing 3 is further provided with a connection end, which is a connector fixed to the housing 3 , and a connection bolt is installed on it to be threadedly connected to the end of the low-voltage DC copper bus 4 .

[0040] The utility model uses two metal cover plates assembled with the housing to isolate the high-voltage AC circuit and the low-voltage DC circuit in two closed cavities, forming an absolute shielding structure. This not only shields the high-voltage circuit from the low-voltage circuit, reducing mutual interference between the high-voltage and low-voltage electromagnetic fields, but also shields the high-voltage and low-voltage circuits from the external environment, reducing mutual interference with the external electromagnetic field.

[0041] In the present invention, the left and right side panels, the front side panel, the two partitions and the bottom panel arranged in the shell, and the rear connecting end of the shell 3 are integrally formed by die casting.

[0042] Assembly process:

[0043] like Figure 2 As shown, first, the high-voltage AC component 5 is assembled in the isolation cavity of the shell 3 and fastened by bolts, and then the high-voltage AC cover plate 2 is assembled on the shell 3 by fastening with bolts to form a shielding structure, so that the high-voltage AC component 5 is in a closed environment.

[0044] Reinforcing ribs are provided at the bends and the easily deformed surfaces of the high-voltage AC cover plate 2.

[0045] like Figure 3 As shown, the low-voltage DC copper busbar 4 is assembled above the high-voltage AC cover plate 2. Due to the presence of the high-voltage AC cover plate 2, even if the high-voltage AC component 5 and the low-voltage DC copper busbar 4 are arranged in a mutually intersecting structure in space, the high-voltage AC circuit and the low-voltage DC circuit can be isolated to form a mutual shielding structure, thereby reducing mutual electromagnetic interference.

[0046] like Figure 4 As shown, the low-voltage DC cover plate 1 is assembled above the low-voltage DC copper busbar 4 and fastened to the housing 3 by bolts, so that the low-voltage DC copper busbar 4 is located in a closed space composed of the high-voltage AC cover plate 2, the housing 3 and the low-voltage DC cover plate 1, forming a shielding structure that can reduce the electromagnetic interference between the high-voltage AC circuit and the low-voltage DC circuit, as well as the electromagnetic interference between the low-voltage DC circuit and other environments.

[0047] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A metal cover shielding structure, characterized in that: It is composed of a low-voltage DC cover plate (1), a high-voltage AC cover plate (2), a housing (3), a low-voltage DC copper busbar (4) and a high-voltage AC component (5); The shell (3) comprises left and right side panels, front and rear side panels, two partitions arranged inside the shell, and a bottom plate; The left side plate, the front side plate, the first partition plate and the bottom plate form an isolation cavity; the high-voltage AC component (5) is assembled in the isolation cavity and fixed to the housing (3); The high-voltage AC cover plate (2) is fastened and assembled on the housing (3), and together with the isolation cavity forms a first shielding structure, so that the high-voltage AC component (5) is located in a closed space; The front end of the low-voltage DC copper busbar (4) is assembled in the middle slot of the front side plate of the housing (3); The low-voltage DC cover plate (1) is assembled above the low-voltage DC copper busbar (4) and fixed to the housing (3); the bottom plate of the housing (3), the first partition plate, the second partition plate, the front side plate of the housing (3) and the low-voltage DC cover plate (1) form a second shielding structure, so that the low-voltage DC copper busbar (4) is also located in a closed space; The rear side of the housing (3) is also provided with a connector fixed to the housing (3), on which a connecting bolt is installed to be threadedly connected to the end of the low-voltage DC copper busbar (4).

2. The metal cover shielding structure according to claim 1, wherein: A bolt connection column is respectively provided at the connection between the left and right side panels and the front side panel; a bolt connection column is provided in the middle of the front side panel; two bolt connection columns are provided behind the first partition panel; and one bolt connection column is provided in front and behind the second partition panel.

3. The metal cover shielding structure according to claim 1, wherein: The front end of the high-voltage AC component (5) is assembled in the isolation cavity and fixed to the shell (3) by bolts, and the terminal wiring harness extends out from the U-shaped opening in the middle of the shell.

4. The metal cover shielding structure according to claim 2, wherein: The high-voltage AC cover plate (2) is screwed to three bolt connection columns via three bolts.

5. The metal cover shielding structure according to claim 1, wherein: The thickness of the high-voltage AC cover plate (2) is reduced to 1 mm.

6. The metal cover shielding structure according to claim 1, characterized in that: Reinforcing ribs are added to the bending parts and the easily deformed surface of the high-voltage AC cover plate (2).

7. The metal cover shielding structure according to claim 1, characterized in that: The front end connection hole of the low-voltage DC copper busbar (4) extends out of the card slot.

8. The metal cover shielding structure according to claim 2, characterized in that: The low-voltage DC cover plate (1) is screwed to four bolt connection columns via four bolts, thereby fastening the low-voltage DC cover plate (1) to the housing (3).

9. The metal cover shielding structure according to claim 1, characterized in that: The left and right side plates, the front side plate, two partition plates and the bottom plate arranged in the shell, and the rear connecting end of the shell (3) are integrally formed by die casting.

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