Cover plate, vehicle ECU and vehicle

Abstract

The utility model provides a cover plate, a vehicle ECU and a vehicle, the cover plate is used for a shell of the vehicle ECU, and the cover plate comprises a cover plate main body; the cover plate peripheral edge part is fixed on the peripheral edge of the cover plate main body through secondary injection molding, and the cover plate peripheral edge part is made of laser-penetrable plastic; wherein the peripheral part of the cover plate is connected with the side wall of the shell through laser welding, so that the shell is sealed by the cover plate; the cover plate is divided into the cover plate main body and the cover plate peripheral part, the laser-penetrable plastic is only used on the cover plate peripheral part, the manufacturing cost of the cover plate is remarkably reduced while the welding quality is ensured, and the cover plate main body and the cover plate peripheral part are connected through secondary injection molding, so that the structural stability and compatibility of the whole structure of the cover plate are ensured.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle electronic control units, and in particular, to a cover plate for a vehicle ECU, a vehicle ECU, and a vehicle. Background Art

[0002] The vehicle ECU (Electronic Control Unit), also known as the vehicle's electronic control unit, is often referred to as the "driving computer" or "onboard computer" in the automotive industry. Functionally, it is a microcomputer controller designed specifically for automobiles. Its internal structure is similar to that of a conventional computer, including a microprocessor (CPU), memory (ROM, RAM), input and output interfaces (I / O), analog-to-digital converters (A / D), and large-scale integrated circuits such as shaping and drivers. It can be said to be the brain of the car.

[0003] Vehicle ECUs typically have a housing that houses integrated circuits and other electronic components. The housing is enclosed by an ECU cover to protect these components. In some known vehicle ECUs, the cover and housing are connected via laser welding. Laser light penetrates the cover, partially melting the housing and welding it to the cover. Consequently, the entire cover is typically made of a plastic with laser-transparent particles, while the housing is typically made of a conventional, laser-opaque plastic.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Utility Model Content

[0005] According to different aspects, one of the objectives of the present application is to reduce the cost of the cover plate while ensuring welding quality.

[0006] In addition, this application also aims to solve or alleviate other technical problems existing in the prior art.

[0007] According to one aspect of the present application, there is provided:

[0008] A cover plate for a vehicle ECU housing, comprising

[0009] Cover body;

[0010] a cover plate peripheral portion, the cover plate peripheral portion being fixed to the peripheral edge of the cover plate body by secondary injection molding, the cover plate peripheral portion being made of laser-transmissive plastic;

[0011] The peripheral edge of the cover plate is connected to the side wall of the shell by laser welding, so that the cover plate closes the shell.

[0012] According to another aspect of the present application, the present application provides a vehicle ECU, comprising a shell and the cover plate described above, wherein the shell is made of laser-impermeable plastic, and the side wall of the shell is connected to the peripheral edge of the cover plate by laser welding, so that the cover plate closes the shell.

[0013] According to yet another aspect of the present application, the present application provides a vehicle comprising the vehicle ECU described above.

[0014] Benefits of this application include:

[0015] 1. This application divides the cover into two parts: the cover body and the cover edge, which are connected into a whole cover using a two-stage injection molding technology. Laser-transmissive plastic is used only in the cover edge where laser welding is required, while lower-cost ordinary plastic is used for the rest of the cover, significantly reducing material costs.

[0016] 2. This application achieves optimal material configuration by precisely controlling the material usage location, which not only meets welding requirements but also controls the manufacturing cost of the cover plate;

[0017] 3. This application is more compatible with different types of plastic materials. By using laser-transmissive plastic on the periphery of the cover and ordinary plastic in the main body, and by using secondary injection molding, a seamless combination of different materials is achieved, ensuring the stability and compatibility of the overall structure.

[0018] 4. Special protrusions are designed at the periphery of the cover to enhance the strength of the connection area. This design not only ensures a firm connection between the two injection-molded parts, but also improves the strength, sealing and durability of the overall structure. A positioning hole plate is also provided on the cover body, which is conducive to the precise positioning of the cover body and the periphery of the cover during injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other features of the present application will become apparent with reference to the accompanying drawings, in which:

[0020] Figure 1 An exploded schematic diagram of a cover plate according to one embodiment of the present application is shown;

[0021] Figure 2 An enlarged view of the cross section showing the connection between the cover plate body and the cover plate peripheral portion.

[0022] Figure 3 Shows a view of the cover plate body viewed from another direction. DETAILED DESCRIPTION

[0023] It is easy to understand that, based on the technical solution of this application, without changing the essential spirit of this application, a person skilled in the art can propose a variety of interchangeable structural methods and implementation methods. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of this application and should not be regarded as the entire application or as a limitation or restriction of the technical solution of this application.

[0024] The terms "up," "down," "left," "right," "front," "back," "front," "back," "top," and "bottom" mentioned or potentially mentioned in this specification are defined relative to the configurations shown in the accompanying drawings. These are relative concepts and may vary depending on the location or usage of the device. Therefore, these or other directional terms should not be construed as restrictive. Furthermore, the terms "first," "second," "third," and similar expressions are used solely for descriptive and distinguishing purposes and should not be construed as indicating or implying the relative importance of the corresponding components or the order or sequence of their assembly.

[0025] refer to Figure 1 , which shows a schematic diagram of an exploded view of a cover plate according to an embodiment of the present application. The cover plate 100 includes a cover plate body 110 and a cover plate peripheral portion 120 arranged around the cover plate body 110. For the convenience of description, Figure 1 The direction from the cover plate peripheral portion 120 to the cover plate main body 110 is defined as the direction from top to bottom, and the cover plate 100 is covered on the housing of the vehicle ECU along this direction. The cover plate peripheral portion 120 is fixed to the periphery of the cover plate main body 110 by secondary injection molding, and the cover plate peripheral portion 120 is made of laser-transmissive plastic. Therefore, the cover plate 100 does not need to be made entirely of laser-transmissive plastic, but only a part of it, namely the cover plate peripheral portion 120, is made of laser-transmissive plastic. When laser welding is used, the laser is incident from the cover plate peripheral portion 120 and hits the side wall of the housing, especially the top end of the housing side wall, melting the top end of the housing side wall so that it can be welded to the cover plate peripheral portion 120, thereby allowing the cover plate 100 to close the housing. This method allows most of the cover 100 (especially the entire cover body) to be manufactured using ordinary plastics that are not transparent to lasers, such as PBT (polybutylene terephthalate) and PPS (polyphenylene sulfide), saving the manufacturing cost of the cover 100. In addition, the cover peripheral portion 120 is fixed to the cover body 110 by secondary injection molding, which also ensures the seamless connection between the cover body 110 and the cover peripheral portion 120, ensuring the stability and compatibility of the overall structure of the cover 100.

[0026] In one embodiment of the present application, the cover plate peripheral portion 120 has a laser transmittance of 20% or greater. The cover plate peripheral portion 120 is made of a laser-transmissive plastic having a transmittance of 20% or greater, so that the laser can penetrate the cover plate peripheral portion 120 to weld the housing without melting the cover plate peripheral portion 120 itself.

[0027] refer to Figure 2 , which shows an enlarged cross-section of the connection between the cover plate body and the cover plate peripheral portion. In this embodiment, a groove 121 is constructed on the cover plate peripheral portion 120, into which the side walls of the housing can be inserted. This groove 121 extends along the entire cover plate peripheral portion 120, allowing the upper ends of all the housing side walls to be inserted, facilitating the positioning and fixing of the cover plate peripheral portion 120 to the housing side walls. Before laser welding, the upper ends of the housing side walls are first inserted into the groove 121. During laser welding, the upper ends of the side walls are melted by the laser and welded to the bottom 1211 of the groove 121. The melted plastic of the side walls flows downward along the inner groove wall 1212 of the groove 121 and eventually solidifies there, preventing the molten plastic from dripping from the housing. Furthermore, the groove 121 also shields the welded joint between the housing and the cover plate 100, preventing it from being exposed and affecting the appearance.

[0028] In one embodiment of the present application, the width of the groove 121 is greater than the width of the sidewall, and the distance between the inner groove wall 1212 of the groove 121 extending in the concave direction and the sidewall is greater than or equal to 0.5 mm. In other words, a clearance fit is adopted between the groove 121 and the sidewall, allowing the upper end of the sidewall to easily engage with the groove 121. The clearance between the groove 121 and the sidewall also provides space for the upper end of the sidewall to deform during laser melting.

[0029] In one embodiment of the present application, for example, Figure 2 In the embodiment, the cover body 110 includes a main board 111 and an inclined portion 112 inclined from the periphery of the main board 111 toward the shell, and the cover peripheral portion 120 is fixed to the inclined portion 112 by secondary injection molding. The structure of the inclined portion 112 makes the shape of the cover body 110 more three-dimensional, and when storing multiple cover plates 100, multiple cover plates 100 can be stacked and stored through the inclined portion 112. An injection molding connection portion 122 connected to the outer groove wall of the groove 121 is constructed on the cover peripheral portion 120, and the injection molding connection portion 122 is connected to the inclined portion 112 by secondary injection molding. The presence of the inclined portion 112 makes the matching injection molding surface of the injection molding connection portion 122 and the inclined portion 112 have a larger surface area, which is beneficial to improving the stability of the injection molding connection.

[0030] In one embodiment of the present application, a protrusion 113 is configured on the inclined portion 112, and a recess 123 that cooperates with the protrusion 113 is configured on the injection molding connection portion 122. When the cover plate peripheral portion 120 is injection-molded to the inclined portion 112 of the cover plate body 110 via the injection molding connection portion 122, the cover plate body 110 is inserted into the recess 123 of the cover plate peripheral portion 120 via the protrusion 113, further strengthening the injection molding connection between the cover plate body 110 and the cover plate peripheral portion 120, improving the stability of the overall structure of the cover plate 100, and also facilitating the precise positioning of the cover plate peripheral portion 120 and the cover plate body 110.

[0031] It should be understood that the protrusion 113 may also be provided on the injection-molded connecting portion 122 , and correspondingly, the recess 123 cooperating therewith is provided on the inclined portion 112 .

[0032] refer to Figure 3 , which shows a view of the cover body from another direction. Figure 3 In the embodiment, two protrusions 114 are arranged on the cover body 110, particularly on the side of the main board 111 of the cover body 110 facing the housing. These protrusions are used to accurately position the cover body 110 with the injection mold to improve the accuracy of injection molding. These two protrusions 114 are, for example, hollow cylindrical protrusions that protrude from the main board 111 toward the housing. It should be understood that more than two protrusions 114 can be provided on the cover body 110 for positioning, and those skilled in the art can also configure the protrusions 114 to other shapes that facilitate positioning of the cover body with the injection mold.

[0033] Another aspect of the present application provides a vehicle ECU comprising a housing and the aforementioned cover plate 100. The housing is made of a laser-impermeable plastic, such as PBT (polybutylene terephthalate) and PPS (polyphenylene sulfide). The housing's sidewalls are laser-welded to the cover plate's peripheral edge 120, enclosing the housing. Electronic components, such as integrated circuits, are disposed within the housing, and the cover plate 100 and the housing seal these components from the outside.

[0034] Another aspect of the present application provides a vehicle, which includes the above-mentioned vehicle ECU.

[0035] It should be understood that the vehicle ECU of the present application can be installed on various vehicles, including cars, trucks, buses, hybrid vehicles, pure electric vehicles, etc. Therefore, the subject matter of the present application is also intended to protect various vehicles equipped with the vehicle ECU of the present application.

[0036] It should be understood that all the above preferred embodiments are illustrative rather than restrictive, and that various modifications or variations made by those skilled in the art to the specific embodiments described above based on the concept of this application should be within the legal protection scope of this application.

Claims

1. A cover plate for a housing of a vehicle ECU, characterized in that: include Cover body; a cover plate peripheral portion, the cover plate peripheral portion being fixed to the peripheral edge of the cover plate body by secondary injection molding, the cover plate peripheral portion being made of laser-transmissive plastic; The peripheral edge of the cover plate is connected to the side wall of the shell by laser welding, so that the cover plate closes the shell.

2. The cover plate according to claim 1, wherein: The cover plate body is made of PBT or PPS, and the light transmittance of the peripheral portion of the cover plate to laser light is greater than or equal to 20%.

3. The cover plate according to claim 1, wherein: A groove into which the side wall can be inserted is formed on the peripheral edge of the cover plate.

4. The cover plate according to claim 3, wherein: The width of the groove is greater than the width of the side wall, and the distance between the inner groove wall extending along the concave direction of the groove and the side wall is greater than or equal to 0.5 mm.

5. The cover plate according to claim 3, characterized in that: The cover plate body includes a main plate and an inclined portion inclined from a periphery of the main plate toward the housing, and the peripheral edge of the cover plate is fixed to the inclined portion by secondary injection molding.

6. The cover plate according to claim 5, characterized in that: An injection-molded connection portion connected to an outer groove wall of the groove is formed on a peripheral portion of the cover plate, and the injection-molded connection portion is injection-molded and connected to the inclined portion.

7. The cover plate according to claim 6, characterized in that: A protrusion is formed on the inclined portion, and a recess that cooperates with the protrusion is formed on the injection-molded connection, or a recess is formed on the inclined portion, and a protrusion inserted into the recess is formed on the injection-molded connection.

8. The cover plate according to claim 5, characterized in that: At least two protrusions are arranged on a side of the main board facing the housing to be used for positioning the cover body and the injection mold.

9. A vehicle ECU, characterized in that: The invention comprises a shell and a cover according to any one of claims 1 to 8, wherein the shell is made of laser-impermeable plastic, and the side wall of the shell is connected to the peripheral edge of the cover by laser welding, so that the cover closes the shell.

10. A vehicle, characterized in that: Comprising the vehicle ECU according to claim 9.

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