Electrical equipment, method for assembling electrical equipment and vehicle comprising electrical equipment

Abstract

The present disclosure relates to an electrical device comprising: a cover (1); a printed circuit board (2); and an electromagnetic interference prevention sheet (3). According to the invention, the anti-electromagnetic interference sheet (3) is arranged between the cover part (1) and the printed circuit board (2), and the anti-electromagnetic interference sheet (3) is fixedly connected with the printed circuit board (2) through a fastener. In addition, the invention also relates to a method for assembling the electrical equipment and relates to a vehicle comprising the electrical equipment.

Description

Technical Field

[0001] The present disclosure relates to the field of electrical technology, and more particularly to an electrical device, a method for assembling the electrical device, and a vehicle including the electrical device. Background Art

[0002] In some electrical equipment, for example, electromagnetic radiation is generated when the chassis of the on-board electronic system of an automobile is working, wherein the interference source couples its signal to other electrical networks through space. In the design of high-speed printed circuit boards (PCBs) and systems, high-frequency signal lines, pins of integrated circuits, various connectors, etc. may become radiation interference sources with antenna characteristics, which can emit electromagnetic waves and affect the normal operation of other systems or other subsystems in the system. To prevent electromagnetic interference (EMI), an anti-electromagnetic interference sheet can be used. However, in the design of existing electrical equipment, the anti-electromagnetic interference sheet is often pre-fixed on the printed circuit board with tools, and then the anti-electromagnetic interference sheet is connected to the corresponding printed circuit board by welding, which is not only cumbersome in process and time, but also has high cost.

[0003] Therefore, there is a need for an electrical device that has a simpler assembly process and saves costs while achieving electromagnetic interference protection. Summary of the invention

[0004] In view of the above problems, the present disclosure provides an electrical device and an assembly method thereof and a vehicle including the electrical device. The electrical device provided by the present disclosure can simplify assembly while achieving electromagnetic interference protection, and can save pre-fixed tools and welding processes, thereby saving costs.

[0005] In order to solve the technical problem, the present disclosure provides an electrical device, comprising:

[0006] lid part;

[0007] Printed circuit boards; and

[0008] Anti-electromagnetic interference sheet.

[0009] According to the present disclosure, the electromagnetic interference protection sheet is arranged between the cover and the printed circuit board, and the electromagnetic interference protection sheet is fixedly connected to the printed circuit board via a fastener.

[0010] Thus, a firm and reliable fixed connection between the electromagnetic interference protection sheet and the printed circuit board is achieved in a simple manner, which is simpler than the welding process and eliminates the need for post-processing of the solder joints and the possible degradation of functionality caused by poor solder joints during use.

[0011] In some embodiments, the anti-electromagnetic interference sheet includes a plug-in portion on the side connected to the printed circuit board, the free end of the plug-in portion includes an elastically deformable extension segment, the printed circuit board includes a groove cooperating with the plug-in portion, and the extension segment is pre-tightenedly supported on the inner wall of the groove.

[0012] Therefore, before the electromagnetic interference protection sheet is finally connected to the printed circuit board, pre-positioning between the two is achieved, which is conducive to fixing the electromagnetic interference protection sheet on the printed circuit board with accurate position and simple process.

[0013] In some embodiments, the electromagnetic interference protection sheet is threadedly connected to the printed circuit board via bolts.

[0014] In some embodiments, the electromagnetic interference protection sheet includes a bent portion on a side connected to the printed circuit board, the bent portion includes a through hole for the fastener to pass through and corresponding to a matching through hole of the printed circuit board.

[0015] In some embodiments, the electromagnetic interference protection sheet includes a contact arm on a side thereof connected to the printed circuit board, and when the electrical device is installed, the contact arm abuts against a surface of the printed circuit board.

[0016] This ensures reliable contact between the electromagnetic interference protection sheet and the printed circuit board, thereby eliminating the potential difference between the two due to poor contact.

[0017] In some embodiments, the electromagnetic interference protection sheet includes an elastically deformable protrusion on a side adjacent to the cover portion, and when the electrical device is installed, a free end of the protrusion is elastically pre-tightened and supported on the surface of the cover portion.

[0018] This ensures reliable contact between the electromagnetic interference protection sheet and the cover, thereby eliminating the potential difference between the two due to poor contact.

[0019] In some embodiments, the printed circuit board includes a first electronic component and a second electronic component, the electrical device includes a first area and a second area, the first electronic component is located in the first area, the second electronic component is located in the second area, and the anti-electromagnetic interference sheet is used to prevent electromagnetic interference between the first electronic component and the second electronic component.

[0020] In some embodiments, the electromagnetic interference protection sheet is designed as a stamped part with an integral structure.

[0021] According to the present disclosure, the electromagnetic interference protection sheet is made of metal, preferably copper or brass. Of course, other suitable conductive materials can also be used to manufacture the electromagnetic interference protection sheet.

[0022] In order to solve the technical problem, the present disclosure also provides a method for assembling the electrical device, the method comprising:

[0023] Pre-positioning the electromagnetic interference protection sheet on the printed circuit board;

[0024] The anti-electromagnetic interference sheet is fixedly connected to the printed circuit board via fasteners;

[0025] The cover is installed so that the free end of the protruding portion of the electromagnetic interference protection sheet is elastically pre-tightened and supported on the surface of the cover.

[0026] In some embodiments, pre-positioning the anti-electromagnetic interference sheet on the printed circuit board includes: inserting the plug-in portion of the anti-electromagnetic interference sheet into a groove of the printed circuit board so that an extended section of the plug-in portion is pre-tightenedly supported on an inner wall of the groove.

[0027] In some embodiments, the anti-electromagnetic interference sheet is fixedly connected to the printed circuit board, including: installing bolts through holes in the bent portion of the anti-electromagnetic interference sheet and matching holes in the printed circuit board, thereby threading the anti-electromagnetic interference sheet to the printed circuit board.

[0028] To solve the technical problem, the present disclosure also provides a vehicle, which includes the above-mentioned electrical device. The vehicle can be a plug-in hybrid electric vehicle, or it can also be a battery electric vehicle or other types of motor vehicles. Based on the above, the vehicle can realize the functions of the electrical device as described above and have the advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, but are not intended to limit the present disclosure.

[0030] Figure 1 A partial perspective view of an assembled electrical device according to the present disclosure;

[0031] Figure 2 for Figure 1 Disassembled diagram of the electrical equipment shown;

[0032] Figure 3 for Figure 1 A partial three-dimensional diagram of an electromagnetic interference protection sheet of the electrical equipment shown;

[0033] Figure 4 An exemplary flow chart of a method for assembling an electrical device according to an embodiment of the present disclosure; and

[0034] Figure 5 A three-dimensional image of the assembled electromagnetic interference protection sheet and printed circuit board.

[0035] List of Reference Numerals

[0036] 1 cover

[0037] 2. Printed Circuit Board

[0038] 21 Matching perforation

[0039] 22 grooves

[0040] 221 First Area

[0041] 222 Second Area

[0042] 3. Anti-electromagnetic interference sheet

[0043] 31 Bending part

[0044] 31a Perforation

[0045] 32 Contact arm

[0046] 33. Connector

[0047] 33a Extension segment

[0048] 34 protuberance.

[0049] 400 Methods

[0050] S401 Step

[0051] S402 Step

[0052] S403 Step DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0054] The "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present disclosure. In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0055] Figure 1 1 is a partial stereogram of an electrical device according to an embodiment of the present disclosure, in which the electrical device is an inverter. Of course, in embodiments not shown, the electrical device may also be other electrical devices that generate electromagnetic radiation when working.

[0056] Figure 2 Schematically shown Figure 1 The disassembled diagram of the electrical equipment shown in the figure. Figure 2 As shown, the electrical device includes a cover 1, a printed circuit board (PCB) 2 and an electromagnetic interference (EMI) protection sheet 3 arranged between the cover 1 and the PCB 2, wherein the cover 1 and the PCB 2 both extend substantially in a planar shape and are parallel to each other.

[0057] A first electronic component and a second electronic component are arranged on the printed circuit board 2. The first electronic component and the second electronic component are selected from, for example, a signal connector, a filter component, and a functional component. The signal connector is used to connect with other electrical devices, receive control or feedback signals from other electrical devices, and can output corresponding feedback or control signals to other electrical devices. The signal received or output via the signal connector can be, for example, a voltage signal, or it can also be a current signal. It is not limited by the specific type of electrical device connected to the signal connector and the signal content input and output by the signal connector.

[0058] The filter assembly is mainly used to prevent the noise generated by the components inside the electrical device from being radiated from the connector opening or conducted along the cable connected to the connector. In addition, it can also filter the AC power from the external power grid to filter the AC noise therein. For example, it can include one or more inductors and one or more capacitors.

[0059] For example, an input filter component can be set at the input connector port on the printed circuit board, and an output filter component can be set at the output connector port on the printed circuit board. For example, the input filter component is a two-stage filter component, which includes a first common-mode inductor, a second common-mode inductor, a first input capacitor, and a second input capacitor. The output filter component is a single-stage filter component, which includes a third common-mode inductor and an output capacitor module. Since the specific composition form and setting position of the input filter component and the output filter component have no important impact on the inventive concept of the present disclosure, they are not shown in more detail in the figure. In addition, it should be noted that based on different actual needs, the filter component can have different composition forms and setting positions.

[0060] The functional components are used to realize the corresponding functions of the electrical device. Figure 1 The inverter shown may include a resonant inductor, a transformer, an inductor and a plurality of transistor regions, which are used to process the AC power inputted from the input end and convert it into a required voltage, for example, convert it into a DC voltage of 400 V, or it may also convert it into a DC voltage of 450 V. It is not limited by the specific composition of the functional components of the electrical device and the specific functions they realize.

[0061] Here, in order to prevent electromagnetic interference between the first electronic component and the second electronic component, an electromagnetic interference prevention sheet 3 is used to partition the printed circuit board 2 to isolate the mutual interference of electromagnetic signals between the first electronic component and the second electronic component.

[0062] like Figure 2 As shown, the electromagnetic interference protection sheet 3 is constructed as an independent sheet structure, and acts to shield the electromagnetic radiation generated by the functional modules inside the electrical device, for example, to prevent the noise generated by the internal devices from radiating from the connector opening or conducting along the cables connected to the connector, so as to reduce the electromagnetic interference generated by it to the external equipment and improve the electromagnetic compatibility (EMC) of the electrical device. In some embodiments, the electromagnetic interference protection sheet 3 is designed as a stamping part of an integrated structure. In the embodiment shown, the electromagnetic interference protection sheet 3 is made of copper in the shape of a thin plate, and the maximum dimension in the plane direction parallel to the printed circuit board 2 is much larger than the maximum dimension in the plane direction perpendicular to the printed circuit board 2, that is, in the height direction. It should be noted that other suitable conductive materials can also be used to manufacture the electromagnetic interference protection sheet.

[0063] Here, the electromagnetic interference protection sheet 3 does not necessarily extend straight, but can be Figures 2 to 3 The "meandering" extension shown, that is, bending in the length direction, can meet the need of dividing the internal space of the electrical equipment into areas.

[0064] One side of the electromagnetic interference protection sheet 3 is fixedly mounted on the printed circuit board 2, and the other side thereof is in contact with the cover 1, thereby dividing the internal space defined by the cover 1 and the printed circuit board 2 into two areas, namely, a first area 221 and a second area 222 which are different in function, especially in electromagnetic radiation performance, wherein the first electronic component is arranged in the first area 221, and the second electronic component is arranged in the second area 222. It should be noted here that, of course, the internal space can also be divided into more than two areas as required.

[0065] Figure 3 for Figure 1 A partial three-dimensional view of the electromagnetic interference protection sheet of the electrical equipment shown.

[0066] like Figure 3 As shown, the side where the electromagnetic interference protection sheet 3 is connected to the printed circuit board 2 includes a bending portion 31 , a contact arm 32 and a plug-in portion 33 .

[0067] The plug-in portion 33 extends downward from the main body of the electromagnetic interference protection sheet 3, and includes an elastically deformable extension section 33a at its free end. In the illustrated embodiment, the extension section 33a is constructed as a curved hook-shaped section, but in an embodiment not shown, the extension section 33a can also be constructed as any shape such as a conical section, as long as it can be elastically deformed. Correspondingly, the printed circuit board 2 includes a groove 22, and the extension section 33a of the plug-in portion 33 can be inserted into the groove 22, so that the extension section 33a is pre-tightened and supported on the inner wall of the groove 22, and then the groove 22 clamps the plug-in portion 33.

[0068] Therefore, before the anti-electromagnetic interference sheet is finally connected to the printed circuit board, pre-positioning between the two is achieved, which is conducive to fixing the anti-electromagnetic interference sheet on the printed circuit board with accurate position and simple process, and saves costs compared with the method of using tools to pre-position the anti-electromagnetic interference sheet.

[0069] The bent portion 31 is vertically bent from the main body of the anti-electromagnetic interference sheet 3 and is opposite to the plane of the printed circuit board 2. The bent portion 31 includes a perforation 31a, and correspondingly, a matching perforation 21 is constructed on the printed circuit board 2, and a fastener can pass through the perforation 31a and the matching perforation 21 at the same time, so as to fix and assemble the anti-electromagnetic interference sheet 3 with the printed circuit board 2. In some embodiments, the fastener can be a bolt, and the anti-electromagnetic interference sheet 3 is fixedly assembled with the printed circuit board 2 by tightening the bolt. In an embodiment not shown, other fasteners, such as rivets, pins, etc., can also be used. In this way, a firm and reliable fixed connection between the anti-electromagnetic interference sheet and the printed circuit board is achieved in a simple way, and the assembly using fasteners is simpler and more cost-saving than the welding process.

[0070] The contact arm 32 is bent along the extension direction of the main body of the electromagnetic interference protection sheet 3. When the electromagnetic interference protection sheet 3 and the printed circuit board 2 are assembled, the contact arm 32 is pre-tightened against the surface of the printed circuit board 2 adjacent to the electromagnetic interference protection sheet 3.

[0071] like Figure 3 As described above, the side of the electromagnetic interference protection sheet 3 adjacent to the cover 1 includes a plurality of protrusions 34, which are also elastically deformable. When the electrical device is assembled, the free ends of the protrusions 34 are elastically preloaded and supported on the surface of the cover 1 adjacent to the electromagnetic interference protection sheet 3.

[0072] Thus, the electromagnetic interference protection sheet 3 is reliably in contact with the cover 1 and the printed circuit board 2 at its upper side and lower side, respectively, thereby ensuring stable electromagnetic interference protection performance.

[0073] Figure 4 An exemplary flow chart of a method 400 for assembling electrical equipment provided by an embodiment of the present disclosure is shown.

[0074] Reference Figure 4 First, in step S401, the electromagnetic interference protection sheet 3 is pre-positioned on the printed circuit board 2. In this process, the plug-in portion 33 on the lower side of the electromagnetic interference protection sheet 3 is inserted into the groove 22 of the printed circuit board 2, so that the extension section 33a of the plug-in portion 33 is elastically pre-tightened and supported on the inner wall of the groove 22, and then the plug-in portion 33 is clamped in the groove 22, so as to realize the pre-positioning of the electromagnetic interference protection sheet 3 and the printed circuit board 2. At this time, the contact arm 32 on the lower side of the electromagnetic interference protection sheet 3 also abuts against the surface of the printed circuit board 2, and the bent portion 31 is in close contact with the surface of the printed circuit board 2.

[0075] Then, in step S402, the electromagnetic interference protection sheet 3 is fixedly connected to the printed circuit board 2 by fasteners. In this process, a bolt is passed through the through hole 31a of the bent portion 31 and the matching through hole 21 of the printed circuit board 2 at the same time, and the bolt is tightened, thereby fixing the electromagnetic interference protection sheet 3 to the printed circuit board 2.

[0076] The schematic diagram of the assembled electromagnetic interference protection sheet 3 and the printed circuit board 2 can be referred to Figure 5 .

[0077] Finally, in step S403, the cover 1 is installed. In this process, the cover 1 is used to close the electrical device from above, and the protrusion 34 on the upper side of the electromagnetic interference shielding sheet 3 is elastically preloaded with its free end supported on the surface of the cover 1 adjacent to the electromagnetic interference shielding sheet 3.

[0078] The anti-electromagnetic interference sheet is pre-positioned by utilizing the plug-in portion, and then fixedly installed by means of fasteners, especially bolts. The resulting electrical equipment and assembly method realize the simple installation of the electrical equipment including the anti-electromagnetic interference sheet, and in view of the advantages of fasteners in terms of process difficulty, labor time consumption and connection quality, a lower installation cost and better quality effect are achieved, thereby obtaining a more stable anti-electromagnetic interference performance.

[0079] The embodiments of the present disclosure also provide a vehicle, which includes the electrical device provided by at least one embodiment of the present disclosure. The vehicle may be an electrified vehicle, such as a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), an extended range electric vehicle (Range extended EV), or a fuel cell vehicle (FCEV). The vehicle may also be a hydrogen energy vehicle.

[0080] By including the above-mentioned electrical device in the vehicle, when the electrical device performs its corresponding function, the assembly can be simplified while achieving electromagnetic interference protection, and the cost can be saved.

[0081] Certain features, structures or characteristics in one or more embodiments of the present application may be appropriately combined.

[0082] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and should not be interpreted in an idealized or highly formal sense, unless explicitly defined as such herein.

[0083] The above is an explanation of the present disclosure and should not be considered as a limitation thereof. Although several exemplary embodiments of the present disclosure are described, it will be readily understood by those skilled in the art that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined in the claims. It should be understood that the above is an explanation of the present disclosure and the present disclosure should not be considered to be limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the present disclosure.

Claims

1. An electrical device, characterized in that: include: cover(1); Printed circuit board (2); as well as Anti-electromagnetic interference sheet (3); The electromagnetic interference prevention sheet (3) is arranged between the cover portion (1) and the printed circuit board (2), and the electromagnetic interference prevention sheet (3) is fixedly connected to the printed circuit board (2) via a fastener.

2. The electrical device according to claim 1, characterized in that The electromagnetic interference protection sheet (3) includes a plug-in portion (33) on the side connected to the printed circuit board (2), the free end of the plug-in portion (33) includes an elastically deformable extension section (33a), the printed circuit board (2) includes a groove (22) cooperating with the plug-in portion (33), and when the electrical device is in an installed state, the extension section (33a) is pre-tightened and supported on the inner wall of the groove (22).

3. The electrical device according to claim 1, characterized in that: The electromagnetic interference protection sheet (3) is threadedly connected to the printed circuit board via bolts.

4. The electrical device according to claim 1, characterized in that: The electromagnetic interference protection sheet (3) includes a bent portion (31) on one side thereof connected to the printed circuit board (2), the bent portion (31) including a through hole (31a), the through hole (31a) being used for the fastener to pass through and corresponding to the matching through hole (21) of the printed circuit board (2).

5. The electrical device according to claim 1, characterized in that: The electromagnetic interference protection sheet (3) comprises a contact arm (32) on the side connected to the printed circuit board (2); when the electrical device is installed, the contact arm (32) abuts against the surface of the printed circuit board (2).

6. The electrical device according to claim 1, characterized in that: The electromagnetic interference protection sheet (3) comprises an elastically deformable protrusion (34) on one side adjacent to the cover (1); when the electrical device is installed, the free end of the protrusion (34) is elastically preloaded and supported on the surface of the cover (1).

7. The electrical device according to claim 1, characterized in that: The printed circuit board (2) comprises a first electronic component and a second electronic component, the electrical device comprises a first area and a second area, the first electronic component is located in the first area, the second electronic component is located in the second area, and the anti-electromagnetic interference sheet is used to prevent electromagnetic interference between the first electronic component and the second electronic component.

8. The electrical device according to claim 1, characterized in that The electromagnetic interference protection sheet (3) is designed as a stamped part with an integrated structure.

9. A method for assembling an electrical device according to any one of claims 1 to 8, characterized in that: include: Pre-positioning the electromagnetic interference protection sheet (3) on the printed circuit board (2); The electromagnetic interference protection sheet (3) is fixedly connected to the printed circuit board (2) via fasteners; as well as The cover (1) is installed so that the free end of the protruding portion (34) of the electromagnetic interference protection sheet (3) is elastically pre-tightened and supported on the surface of the cover (1).

10. The method according to claim 9, characterized in that Pre-positioning the electromagnetic interference protection sheet (3) on the printed circuit board (2) comprises: The plug-in portion (33) of the electromagnetic interference protection sheet (3) is inserted into the groove (22) of the printed circuit board (2), so that the extended section (33a) of the plug-in portion (33) is pre-tightened and supported on the inner wall of the groove (22).

11. The method according to claim 9, characterized in that The electromagnetic interference protection sheet (3) is fixedly connected to the printed circuit board (2) via fasteners, include: The electromagnetic interference prevention sheet (3) is threadedly connected to the printed circuit board (2) by installing bolts into the through holes (31a) of the bent portion (31) of the electromagnetic interference prevention sheet (3) and the matching through holes (21) of the printed circuit board (2).

12. A vehicle, characterized in that: The vehicle comprises the electric device according to any one of claims 1-8.

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