Grounding device and smart grid management module

Abstract

The utility model relates to a grounding device, including metal shell, there is a convex rod on the metal shell, still include ground spring piece, the ground spring piece is U type board shape, one side is fixed end, the fixed end welds and fixes on the grounding point on printed circuit board, the other side is free end, the free end with convex rod position corresponds. The utility model can guarantee ground reliable fast and stable, has reduced the requirement of the accurate degree of assembly positioning between printed circuit board and metal shell bottom plate, and the requirement of positioning accuracy between the cover plate and the bottom plate, has reduced the requirement of product consistency height, has improved product pass rate, has reduced manufacturing control difficulty.

Description

Technical Field

[0001] This utility model relates to a grounding device, and more particularly to a smart grid management module for an automotive electrical junction box, belonging to the field of automotive electrical box manufacturing technology. Background Technology

[0002] As the electronic and electrical architecture and functions of vehicles become increasingly complex, especially with the increasing prevalence of assisted driving and even autonomous driving systems, these scenarios and vehicle functions have a growing impact on vehicle driving safety. The power supply of the system faces increasingly higher requirements in terms of power and reliability. If the power supply in these scenarios fails, the power supply, as its most basic and core function, will also lose its corresponding functions, which will have an extremely serious impact on the driving safety of the entire vehicle, and may even lead to tragic accidents involving vehicle destruction and loss of life.

[0003] To avoid this situation, from the perspective of vehicle electronic and electrical architecture and functional safety, it is necessary to improve the functional safety level of the power network and ensure that the above functions can work normally. The smart grid management module has emerged to ensure the safety and reliability of the vehicle power network.

[0004] The metal casing and grounding device of the smart grid management module are designed to shield against interference. Grounding can conduct away external electromagnetic interference and prevent internal interference from radiating to the outside. It also helps suppress common-mode noise, allowing high-frequency interference signals to return to their source through the grounding path, thus reducing their impact on signal lines.

[0005] The existing grounding device consists of a protruding rod on a metal casing (aluminum alloy top cover). The protruding rod is brought into contact with the grounding connection point on the printing plate by accurate positioning during assembly, thereby achieving the grounding function. Summary of the Invention

[0006] The implementation of the above-mentioned grounding function requires a high degree of accuracy in assembly positioning. Moreover, accurate positioning depends on the positioning between the printed circuit board and the metal casing base plate, as well as the positioning between the cover plate and the base plate. It is also affected by the manufacturing precision of the protrusion and the printed circuit board itself, resulting in a high probability of grounding failure in practice.

[0007] The present invention aims to provide a new grounding device and a corresponding smart grid management module to solve the above-mentioned technical problems.

[0008] The present invention adopts the following technical solution:

[0009] A grounding device includes a metal housing with a protruding rod on it, and a grounding spring 2. The grounding spring 2 is U-shaped, with one side being a fixed end that is welded to a grounding point on a printed circuit board 3, and the other side being a free end that corresponds to the position of the protruding rod.

[0010] Preferably, the free end of the grounding spring 2 has an inwardly bent triangular structure.

[0011] Furthermore, the main body of the triangular structure and the grounding spring 2 is formed by bending a continuous metal plate.

[0012] Preferably, the surface area of ​​the free end of the grounding spring 2 is greater than the end face area of ​​the protruding rod.

[0013] Preferably, the metal casing includes an aluminum alloy top cover 1 and a protruding rod, wherein the protruding rod and the aluminum alloy top cover 1 are an integral structure.

[0014] Preferably, the printed circuit board 3 is the PCBA of the main body of the smart grid management module.

[0015] Preferably, a welding process hole is provided at the fixed end of the grounding spring 2.

[0016] A smart grid management module includes the aforementioned grounding device, with the grounding spring 2 soldered onto the pads of the PCBA of the main body of the smart grid management module.

[0017] Preferably, the aluminum alloy top cover 1 is fastened to the main body of the smart grid management module by screws.

[0018] Preferably, when the installation and positioning are completed, the grounding spring 2 described in the design standard has a slight elastic deformation.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1) It can quickly and reliably ensure reliable grounding.

[0021] 2) It can shield interference and ensure power grid isolation.

[0022] 3) It is safe and convenient to use, and the molding mold is simple and the molding process is reliable.

[0023] 4) It reduces the accuracy requirements for the assembly and positioning between the printed circuit board and the metal casing base plate, as well as the accuracy requirements for the positioning between the cover plate and the base plate, thereby reducing the requirements for product consistency, improving the product qualification rate, and reducing the difficulty of manufacturing control. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the grounding device of this utility model.

[0025] Figure 2 This is a schematic diagram of the grounding spring.

[0026] Figure 3 This is a view of the main body of the smart grid management module (excluding the top cover). The dot on its left side is the welding point of the grounding spring.

[0027] Figure 4 This is a view of the aluminum alloy top cover. (a) is a view of the internal structure of the aluminum alloy top cover, and (b) is a view of the external appearance of the aluminum alloy top cover.

[0028] Figure 5 This is a view of the protruding rod on the aluminum alloy top cover.

[0029] Figure 6 This is a view of the PCBA pads.

[0030] Figure 7 This is an overall external view of the smart grid management module.

[0031] In the diagram: 1. Aluminum alloy top cover; 2. Grounding spring; 3. Printed circuit board (or the main body of the smart grid management module). Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] See Figure 3-4 , Figure 3 This image shows a view of the main body of the smart grid management module (excluding the top cover). The dot on its left side is the welding point for the grounding spring. Figure 4 The images show views of the aluminum alloy top cover. (a) is an internal view of the aluminum alloy top cover, and (b) is an external view of the aluminum alloy top cover.

[0034] Figure 3 The component has a grounding pad located on the printed circuit board. In the prior art, this pad is used for direct contact with the protrusion. The shape and position of the protrusion are shown in the appendix. Figure 4 and attached Figure 5 Due to limitations in the dimensional and assembly precision of the products themselves, grounding problems often occur in existing technologies.

[0035] Therefore, this utility model provides a grounding device, see appendix. Figure 1-2 and in conjunction with the appendix Figure 3-5 See the appendix for details. Figure 1A grounding device includes a metal housing with a protruding rod welded on it, and a grounding spring 2. The grounding spring 2 is U-shaped, with one side being a fixed end that is welded and fixed to a grounding point on a printed circuit board 3, and the other side being a free end that corresponds to the position of the protruding rod.

[0036] In this embodiment, see Appendix Figure 2 The free end of the grounding spring 2 has an inwardly bent triangular structure.

[0037] Furthermore, the main body of the triangular structure and the grounding spring 2 is formed by bending a continuous metal plate.

[0038] In this embodiment, the surface area of ​​the free end of the grounding spring 2 is larger than the end face area of ​​the protruding rod. This is not shown in the accompanying drawings.

[0039] See Figure 4 The metal casing includes an aluminum alloy top cover 1 and a protruding rod, wherein the protruding rod and the aluminum alloy top cover 1 are an integral structure, such as... Figure 4 As shown in (a).

[0040] In this embodiment, see Figure 3 The printed circuit board 3 is the PCBA of the main body of the smart grid management module.

[0041] See Figure 2 A welding process hole is provided at the fixed end of the grounding spring 2.

[0042] A smart grid management module includes the aforementioned grounding device, with the grounding spring 2 soldered onto the pads of the PCBA of the main body of the smart grid management module.

[0043] Specifically, the aluminum alloy top cover 1 is fastened to the main body of the smart grid management module with screws. This is not shown in the attached drawings.

[0044] When the installation and positioning are completed, the grounding spring 2 described in the design standard has a slight elastic deformation, which makes the grounding more reliable.

[0045] See Figure 1 , Figure 2 As shown, the grounding spring 2 is welded to the main body PCBA of the smart grid management module 3. During assembly, after the aluminum alloy cover 1 is fixed to the main body 3 of the smart grid management module with screws, it comes into contact with the grounding spring 2 to complete the grounding connection.

[0046] See Figure 3 and Figure 6 As shown, the main PCBA of the smart grid management module has pads with a diameter of 3mm, which can be used to connect circuits.

[0047] See Figure 4 and Figure 5 The aluminum alloy top cover 1 has a conical protrusion (grounding post) made of aluminum alloy, which has good heat dissipation and conductivity.

[0048] See Figure 6 It refers to the overall external structure of the finished product of the smart grid management module.

[0049] This invention provides a quick and convenient way to implement the grounding function of a smart grid management module, ensuring both assembly stability and reliable grounding to prevent connection issues and guarantee product functionality. The molding process is simple and reliable, making this structure worthy of widespread application in smart grid management modules and other electronic and electrical products.

[0050] The above are preferred embodiments of the present utility model. Those skilled in the art can make various changes or improvements based on this. Without departing from the overall concept of the present utility model, these changes or improvements should all fall within the scope of protection claimed by the present utility model.

Claims

1. A grounding device, comprising a metal housing, wherein the metal housing has a protruding rod, characterized in that: It also includes a grounding spring (2), which is U-shaped, with one side being a fixed end that is welded to the grounding point on the printed circuit board (3) and the other side being a free end that corresponds to the position of the protruding rod.

2. The grounding device as described in claim 1, characterized in that: The free end of the grounding spring (2) has an inwardly bent triangular structure.

3. The grounding device as described in claim 2, characterized in that: The main body of the triangular structure and the grounding spring (2) is formed by bending a continuous metal plate.

4. The grounding device as described in claim 1, characterized in that: The surface area of ​​the free end of the grounding spring (2) is greater than the end face area of ​​the protruding rod.

5. The grounding device as described in claim 1, characterized in that: The metal casing includes an aluminum alloy top cover (1) and a protruding rod, which are integrally formed with the aluminum alloy top cover (1).

6. The grounding device as described in claim 1, characterized in that: The printed circuit board (3) is the PCBA of the main body of the smart grid management module.

7. The grounding device as described in claim 1, characterized in that: A welding process hole is opened at the fixed end of the grounding spring (2).

8. A smart grid management module, characterized in that: The device includes the grounding device as described in claim 6, wherein the grounding spring (2) is soldered onto the pad of the PCBA (3) of the main body of the smart grid management module.

9. The smart grid management module as described in claim 8, characterized in that: The aluminum alloy top cover (1) is fastened to the main body of the smart grid management module by screws.

10. The smart grid management module as described in claim 8, characterized in that: When the installation and positioning are completed, the grounding spring (2) described in the design standard has a small elastic deformation.

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