Vehicle-mounted power supply device and vehicle
By using electromagnetic interference shielding elements made of non-metal conductive materials between the walls and covers of the vehicle-mounted power supply equipment, the high cost and wear problems of anti-electromagnetic interference in the prior art are solved, and low-cost, easy assembly and effective electromagnetic prevention are achieved. The effects of interference and wear.
Patent Information
- Application Number
- CN202310877960.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-17
- Publication Date
- 2025-01-17
AI Technical Summary
Existing automotive power supply equipment is costly and prone to wear in terms of electromagnetic interference protection, resulting in debris/powder problems, and is complex in assembly, affecting electromagnetic compatibility.
The electromagnetic interference shielding element made of non-metal conductive material clamps between the wall and the cover of the shell through elastic deformation, forming a conductive connection, closing the gap, avoiding wear and noise, and simplifying the assembly process.
It realizes effective prevention of electromagnetic interference on the basis of low cost and easy assembly, avoids debris/powder problems caused by wear, and improves electromagnetic compatibility and sound silence effect.
Smart Images
Figure CN119325222A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of electrical technology, and more particularly to a vehicle-mounted power supply device and a vehicle including the vehicle-mounted power supply device. Background Art
[0002] The vehicle's on-board power supply equipment generates electromagnetic radiation when it is working, in which the interference source couples its signal to other electrical networks through space. In system design, high-frequency signal lines, integrated circuit pins, 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. In order to prevent electromagnetic interference, it is necessary to keep the on-board power supply equipment as a complete conductor, which requires good contact between any two adjacent conductive walls in the on-board power supply equipment. For example, a gap is formed between the wall and the cover of the on-board power supply equipment, so that there is an unclosed chamber in the on-board power supply equipment, which affects electromagnetic compatibility. For this reason, metal anti-electromagnetic interference shrapnel is traditionally used to make conductive contact with the wall and the cover respectively. However, the disadvantage of this design is that the assembly of the metal anti-electromagnetic interference springs may be difficult, which makes this method more expensive; in addition, in existing designs, the wall is directly in contact with the cover (or not in contact, but the gap between the wall and the cover is very small, such as 0.05mm). However, the disadvantage of this design is that the vibration caused by the operation of the vehicle often generates debris / powder caused by the wear of the on-board power supply equipment, which is fatal to electrical products.
[0003] Therefore, there is a need for an on-vehicle power supply device that is easier to assemble, has a lower manufacturing cost, and prevents debris / powder caused by wear while achieving electromagnetic interference protection. Summary of the invention
[0004] In view of the above problems, the present disclosure provides a vehicle-mounted power supply device and a vehicle including the vehicle-mounted power supply device. The vehicle-mounted power supply device provided by the present disclosure can effectively prevent electromagnetic interference, is easier to assemble and has a lower manufacturing cost, and can prevent the problem of debris / powder caused by wear.
[0005] In order to solve the technical problem, the present disclosure provides a vehicle-mounted power supply device. According to the present disclosure, the vehicle-mounted unit device includes a shell and an electromagnetic interference shielding element, wherein the shell includes a cover and a wall, the wall separates two adjacent spaces in the shell, and the electromagnetic interference shielding element is arranged between the cover and the wall and is in conductive contact with the cover and the wall.
[0006] Preferably, a top surface of the wall is adjacent to the cover, and the electromagnetic interference shielding element is a strip-shaped shielding element.
[0007] Further preferably, the electromagnetic interference shielding element is an electromagnetic interference shielding layer.
[0008] In this case, the EMI shielding layer extends in the gap between the cover and the wall, thereby forming a substantially closed cavity.
[0009] Preferably, the electromagnetic interference shielding layer is made of an elastically compressible non-metallic conductive material, wherein the thickness of the electromagnetic interference shielding layer in an uncompressed original state is greater than the width of the gap between the cover and the wall.
[0010] According to the present disclosure, the electromagnetic interference shielding element is made of a non-metallic conductive material. On the one hand, the electromagnetic interference shielding element undergoes elastic deformation under extrusion, thereby being clamped between at least two adjacent wall portions of the on-board power supply device, thereby bridging the narrow gap originally formed therein, establishing a reliable conductive connection between the adjacent wall portions, forming a basically closed cavity, and eliminating the electromagnetic interference caused thereby; on the other hand, the composition of the non-metallic material avoids the risk of the on-board power supply device generating fragments / powder due to vibration wear; furthermore, due to the good elastic deformation characteristics and the selection of non-metallic materials, the disadvantage of noise generated between components due to vibration is basically eliminated, and a good sound insulation effect is achieved.
[0011] Preferably, the electromagnetic interference shielding element is made of conductive foam or conductive rubber. Preferably, the conductive foam comprises a foamed polymer, a conductive filler and an antistatic agent.
[0012] According to the present disclosure, preferably, the electromagnetic interference shielding element is bonded to the cover and / or the wall.
[0013] As an alternative or in addition, a groove for accommodating an electromagnetic interference shielding element is provided in the cover and / or the wall.
[0014] Further preferably, the electromagnetic interference shielding element is snapped into a groove of the cover and / or the wall.
[0015] Preferably, the wall is integrally formed with the housing.
[0016] Preferably, the wall is formed inside the shell by casting or splicing process.
[0017] The electromagnetic interference shielding element is thereby mounted between the wall and the cover in a simple process.
[0018] Preferably, the vehicle-mounted power supply device includes a vehicle-mounted charger or a DC converter or a power distribution unit or a motor controller.
[0019] To solve the technical problem, the present disclosure also provides a vehicle, which includes the above-mentioned vehicle-mounted power supply 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 motor components and the motor as described above, and has the advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention, rather than limiting the present disclosure.
[0021] Figure 1 is a partial perspective view of a vehicle-mounted power supply device according to the present disclosure, wherein no electromagnetic interference shielding element is installed;
[0022] Figure 2 is a disassembled diagram of a vehicle-mounted power supply device according to the present disclosure;
[0023] Figure 3 for Figure 2 A partial perspective view of the vehicle power supply device shown;
[0024] Figure 4 for Figure 3 A partial perspective view of the vehicle power supply device shown; and
[0025] Figure 5 for Figure 2 A partial perspective view of the on-board power supply unit shown.
[0026] List of Reference Numerals
[0027] 1 On-board power supply equipment
[0028] 11 Cover
[0029] 12 walls
[0030] 2 EMI Shielding Components
[0031] 20 Bend.
[0032] 221 First Space
[0033] 222 Second Space DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments.
[0035] 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.
[0036] Figure 1 A partial perspective view of a vehicle-mounted power supply device 1 according to an embodiment of the present disclosure is schematically shown. The vehicle-mounted power supply device may include a vehicle-mounted charger or a DC converter or a power distribution unit or a motor controller, etc. It should be noted that the vehicle-mounted power supply device in the present disclosure is not limited by the specific type of the vehicle-mounted power supply device.
[0037] The vehicle-mounted power supply device 1 includes a shell, and the shell includes a cover 11 and a wall 12. A circuit board and various electrical components on the circuit board are installed in the shell. The circuit board is, for example, an AC filter board or a DC filter board, and the electrical components include, for example, a signal connector, a filter component, and a functional component. The signal connector is used to connect with other vehicle-mounted power supply devices, receive control or feedback signals from other vehicle-mounted power supply devices, and can output corresponding feedback or control signals to other vehicle-mounted power supply 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 the vehicle-mounted power supply device connected to the signal connector and the signal content input and output by the signal connector.
[0038] The filter assembly is mainly used to prevent the noise generated by the components inside the vehicle power supply 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.
[0039] For example, an input filter component can be set at the input connector port on the circuit board, and an output filter component can be set at the output connector port on the 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 public idea of the present disclosure, they are not shown in 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.
[0040] The functional components are used to implement the corresponding functions of the vehicle-mounted power supply device. The functional components of the vehicle-mounted power supply device may include, for example, a resonant inductor, a transformer, an inductor, and a plurality of transistor regions, which are used to process the AC input from the input end and convert it into a required voltage, for example, convert it into a 400V DC voltage, or it may also be converted into a 450V DC voltage. It is not limited by the specific composition of the functional components of the vehicle-mounted power supply device and the specific functions implemented by them.
[0041] For simplicity, Figure 1 Only two adjacent components of the vehicle power supply device 1 are shown, namely, a cover 11 extending substantially in the horizontal direction and a part of a wall 12 extending substantially in the vertical direction. The wall 12 is designed as an electromagnetic compatibility shielding wall as a plate-like structure, and is intended to be used to shield the electromagnetic radiation generated by the internal functional modules of the vehicle power supply device from the outside, for example, to prevent the noise generated by the internal components from radiating from the connector opening or being conducted along the cables connected to the connector, so as to reduce the electromagnetic interference generated by the noise to the external devices and improve the electromagnetic compatibility (EMC) of the vehicle power supply device. The wall 12 is a conductive material, for example, it can be made of a metal material, for example, it can be formed into a thin metal sheet.
[0042] However, it should be understood that other materials with conductive properties can also be selected to make the wall 12, as long as it can achieve the function of reducing electromagnetic interference described in the present disclosure. The embodiments of the present disclosure are not limited by the specific composition materials of the wall.
[0043] In some embodiments, the wall 12 is a plurality of walls, and for example, the wall 12 can form a plurality of shielding cavities in the housing of the vehicle power supply device 1 for shielding the electromagnetic radiation generated by the vehicle power supply device 1 from affecting its associated components.
[0044] However, the embodiments of the present disclosure are not limited thereto, and may also include a single wall, for example, a single wall is provided to protect the input filter component in the vehicle power supply device from the electromagnetic radiation generated by the vehicle power supply device. It should be understood that the embodiments of the present disclosure are not limited by the number of the walls and their connection relationship.
[0045] like Figure 1 As shown, there is a gap between the cover 11 and the wall 12 , which disadvantageously can lead to undesired electromagnetic interference.
[0046] Figure 2 The disassembly diagram of the vehicle-mounted power supply device 1 according to an embodiment of the present disclosure is schematically shown. As mentioned above, the vehicle-mounted power supply device 1 includes a housing, and the housing includes a cover 11 and a wall 12. The wall 12 can be integrally formed with the housing, and the cover 11 is independently constructed relative to the wall 12. The embodiments of the present disclosure are not limited by the specific manner in which the housing and the wall are integrally formed.
[0047] Based on the above, by integrally forming the wall 12 and the shell, during the manufacturing process of the vehicle-mounted power supply equipment, there is no need for separate assembly and welding fixation steps between the wall 12 and the shell, which simplifies the manufacturing process, streamlines the manufacturing process, and saves manufacturing costs.
[0048] In some embodiments, the wall is formed inside the housing by a casting or splicing process.
[0049] Specifically, the wall 12 can be cast together with the shell through a pre-set mold to form an integral body. Alternatively, the wall 12 can be manufactured independently of the shell and then assembled. For example, if a plurality of grooves are pre-formed in the shell, the wall 12 can be inserted into the pre-formed grooves in the shell to achieve assembly of the two.
[0050] However, it should be understood that other methods can also be used to manufacture the wall and the shell. The embodiments of the present disclosure are not limited by the specific manufacturing method adopted for the wall and the shell. The circuit board together with electrical components, such as signal connectors, filter components, and functional components are arranged in the space defined by the shell, wherein the wall 12 separates two adjacent spaces in the shell. As mentioned above, there is a gap between the cover 11 and the wall 12 that may cause electromagnetic interference. In order to eliminate electromagnetic interference, an electromagnetic interference shielding element 2 is provided between the cover 11 and the wall 12 of the vehicle-mounted power supply device 1.
[0051] In an alternative embodiment not shown, the electromagnetic interference shielding element according to the present disclosure may be applied between any at least two wall portions in the vehicle power supply device that may generate electromagnetic interference due to a gap, and is not limited to between the cover 11 and the wall 12 .
[0052] Here, the electromagnetic interference shielding element 2 is an elastically deformable electromagnetic interference shielding layer, wherein the electromagnetic interference shielding element 2 is preferably made of conductive foam, which has elastic compressibility. It should be noted that the electromagnetic interference shielding element 2 can be made of conductive foam, conductive rubber or other polymer materials, and the present disclosure does not limit this. The initial thickness of the electromagnetic interference shielding element 2 in the original uncompressed state is greater than the width of the gap between the cover 11 and the wall 12, so that when the vehicle-mounted power supply device 1 is installed, the electromagnetic interference shielding element 2 sandwiched between the cover 11 and the wall 12 is compressed between the cover 11 and the wall 12, so as to be in close contact with the cover 11 and the wall 12, and a reliable conductive connection is formed between the cover 11 and the wall 12, thereby isolating the different spaces on both sides of the wall 12 from each other in a closed manner, forming multiple electromagnetically isolated spaces, such as Figure 3 The first space 221 shown is located on the left side of the wall 12 and the second space 222 is located on the right side of the wall 12.
[0053] The use of the electromagnetic interference shielding element as described above avoids the risk of generating fragments / powder due to vibration wear of the vehicle-mounted power supply equipment; due to the good elastic deformation characteristics and the selection of non-metallic materials, the disadvantage of noise generated by vibration between components is basically eliminated, and a good noise reduction effect is achieved; moreover, the electromagnetic interference shielding element is easy to assemble and has a low manufacturing cost.
[0054] Figure 4 Schematically shown Figure 3 The enlarged view of the circled part. Figure 4 As shown, the cover 11 is generally plate-shaped, and a flange is formed at the edge of the cover 11 protruding from the bottom surface toward the interior of the housing space. The top surface of the wall 12 is adjacent to the plate-shaped portion of the cover 11 to form a generally T-shaped contact area.
[0055] The EMI shielding element 2 is a strip-shaped shielding element and extends longitudinally in the middle of the lower surface of the cover 11, wherein the EMI shielding element 2 comprises a bent portion 20 adapted to the shape of the cover 11 at both ends to fit the corresponding wall portion to the greatest extent.
[0056] The EMI shielding element 2, in a compressed state, contacts the lower surface of the cover 11 with its top surface and contacts the top surface of the wall 12 facing the cover 11 with its bottom surface, thereby electrically connecting the cover 11 and the wall 12. Figure 5 In the embodiment shown, the EMI shielding element 2 is bonded with its top surface to the lower surface of the cover 11 and is correspondingly clamped between the cover 11 and the wall 12 .
[0057] Alternatively, the EMI shielding element 2 may be bonded to the upper edge of the wall 12 with its bottom surface, or the EMI shielding element 2 may be bonded to the lower surface of the cover 11 and the upper surface of the wall 12 with its top surface and bottom surface respectively.
[0058] As a result, an electrically conductive connection is established between the electromagnetic shielding element 2 and the cover 11 and / or the wall 12. This connection method is characterized by simple process and low cost as well as flexible arrangement of the electromagnetic shielding element.
[0059] However, in an embodiment not shown, a groove for accommodating the electromagnetic interference shielding element 2 may also be provided on the cover 11 or the wall 12, so that the electromagnetic shielding element 2 is accommodated in the groove in a form-fitting manner. The side wall height of the groove should be less than the original thickness of the electromagnetic interference shielding element 2 in its uncompressed state, that is, in the uncompressed state of the electromagnetic shielding element 2, the free end of the electromagnetic shielding element 2 should protrude from the upper edge of the groove instead of being sunken in the groove, so that the electromagnetic interference shielding element 2 can be tightly attached to the cover 11 and the wall 12 with its top surface and bottom surface respectively in the compressed state, so that a reliable conductive connection can be established between the two.
[0060] As a result, a detachable connection is established between the electromagnetic shielding element 2 and the cover 11 and / or the wall 12 .
[0061] In addition, the above-mentioned connection methods of the electromagnetic shielding element 2 can be combined with each other, that is, a groove for accommodating the electromagnetic shielding element 2 can be opened on the cover 11 and / or the wall 12, so that the electromagnetic shielding element 2 can be embedded in the groove in a shape-fitting manner, and an adhesive can be applied to the top surface and / or the bottom surface of the electromagnetic shielding element 2 so that it can form a bond with the cover 11 and / or the wall 12.
[0062] At least one embodiment of the present disclosure further provides a vehicle, which includes the on-board power supply 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.
[0063] By including the vehicle-mounted power supply device as described above in the vehicle, when the vehicle-mounted power supply device performs its corresponding function, it can be easier to assemble and have a lower manufacturing cost while effectively preventing electromagnetic interference, and can prevent debris / powder problems caused by wear.
[0064] Certain features, structures or characteristics in one or more embodiments of the present application may be appropriately combined.
[0065] 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.
[0066] 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. A vehicle-mounted power supply device (1), characterized in that: The vehicle-mounted power supply device comprises a housing and an electromagnetic interference shielding element (2), The shell comprises a cover (11) and a wall (12), wherein the wall (12) separates two adjacent spaces in the shell, and the electromagnetic interference shielding element (2) is arranged between the cover (11) and the wall (12) and is in conductive contact with the cover (11) and the wall (12).
2. The vehicle-mounted power supply device according to claim 1, characterized in that: The top surface of the wall (12) is adjacent to the cover (11), and the electromagnetic interference shielding element (2) is a strip-shaped shielding element.
3. The vehicle-mounted power supply device according to claim 2, characterized in that: The electromagnetic interference shielding element (2) is an electromagnetic interference shielding layer.
4. The vehicle-mounted power supply device according to claim 3, characterized in that: The electromagnetic interference shielding layer is made of an elastically compressible non-metallic conductive material, and the thickness of the electromagnetic interference shielding layer in an uncompressed original state is greater than the width of the gap between the cover (11) and the wall (12).
5. The vehicle-mounted power supply device according to claim 1, characterized in that: The material of the electromagnetic interference shielding element (2) includes conductive foam or conductive rubber.
6. The vehicle-mounted power supply device according to claim 1, characterized in that: The electromagnetic interference shielding element (2) is bonded to the cover (11) and / or the wall (12).
7. The vehicle-mounted power supply device according to claim 1, characterized in that: The cover (11) and / or the wall (12) are provided with a groove for accommodating the electromagnetic interference shielding element (2).
8. The vehicle-mounted power supply device according to claim 7, characterized in that: The electromagnetic interference shielding element (2) is snapped into the groove of the cover (11) and / or the wall (12).
9. The vehicle-mounted power supply device according to claim 1, characterized in that: The wall (12) is integrally formed with the shell.
10. The vehicle-mounted power supply device according to claim 1, characterized in that: The wall (12) is formed inside the shell by casting or splicing process.
11. The vehicle-mounted power supply device according to claim 1, characterized in that: The vehicle-mounted power supply device includes a vehicle-mounted charger or a DC converter or a power distribution unit or a motor controller.
12. A vehicle, characterized in that: The vehicle includes the in-vehicle power supply device according to any one of claims 1 to 11.