Terminal fixing structure and thin film capacitor

Abstract

The utility model discloses a terminal fixed structure and film capacitor, including electrode plate and casing, are equipped with the terminal on the electrode plate, are equipped with the open gap at the side of terminal, are equipped with the limit peg on the casing, and the open gap and the limit peg's location cooperation will be positioned on the casing and ensure the installation flatness of terminal on the casing through the open gap and the limit peg's location cooperation. The utility model utilizes through the open gap and the limit peg's location cooperation and can realize the positioning installation of terminal on the casing, and can guarantee the flatness of terminal.

Description

Technical Field

[0001] This utility model relates to the field of thin film capacitor technology, specifically to a terminal fixing structure and a thin film capacitor. Background Technology

[0002] In existing technologies, the traditional connection method between the terminals of the vehicle bus capacitor and the power module is generally to fix them with bolts. However, the laser connection process for terminals is the latest manufacturing process that upgrades and iterates the manufacturing process of new energy vehicles. It is difficult to ensure the flatness of the terminals during the assembly of boltless capacitors. If the flatness of the welding surface of the capacitor terminals cannot be guaranteed, welding quality defects such as incomplete soldering, burn-through terminals, and spatter are likely to occur during the laser welding process. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a terminal fixing structure that utilizes the limiting cooperation between an open notch and a limiting pin to achieve both the positioning and installation of the terminal block on the housing and to ensure the flatness of the terminal block.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: A terminal fixing structure includes an electrode plate and a housing. A wiring terminal is provided on the electrode plate, and an open notch is provided on the side of the wiring terminal. A limiting pin is provided on the housing. The wiring terminal is positioned on the housing by the limiting cooperation between the open notch and the limiting pin, and the mounting flatness of the wiring terminal on the housing is ensured.

[0005] Furthermore, at least one open notch is provided on both the left and right sides of the terminal block, and multiple limiting pins corresponding to each open notch are provided on the housing. The terminal block is positioned on the housing by the limiting engagement of the open notches on both sides of the terminal block and the corresponding limiting pins, which also limit the left and right and front and back of the terminal block and ensure the flatness of the terminal block on the housing.

[0006] Furthermore, the limiting pin has a cylindrical structure, while the open notch has an arc-shaped notch structure.

[0007] Furthermore, the open gap is a semi-circular gap structure.

[0008] Furthermore, the limiting pin and the housing are integrally injection molded structures.

[0009] Furthermore, a boss corresponding to the bottom of the terminal block is provided on the housing, and a gap of 0.1mm to 0.3mm is reserved between the top of the boss and the bottom of the terminal block to form a stress relief space for the terminal block to release assembly stress.

[0010] Furthermore, both the top of the boss and the bottom of the terminal block have a flat surface structure.

[0011] Furthermore, a soldering surface is formed on the top of the terminal block.

[0012] Based on the same inventive concept, this utility model also provides a thin-film capacitor, including the above-mentioned terminal fixing structure.

[0013] Furthermore, the housing is equipped with support columns for supporting the PCB board.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] In the terminal fixing structure and film capacitor described in this utility model, the limiting pin on the housing and the open notch on the side of the terminal are used for limiting cooperation. On the one hand, the terminal and the housing can be positioned and assembled. On the other hand, the flatness of the terminal on the housing can be guaranteed. This helps to improve the laser welding quality of the terminal, thereby ensuring the operational stability and service life of the capacitor. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the thin-film capacitor according to an embodiment of the present invention.

[0017] Figure 2 This is a side view of a thin-film capacitor according to an embodiment of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the electrode plate according to an embodiment of the present invention.

[0019] Figure 4 yes Figure 1 A magnified view of section A in the image.

[0020] Figure 5 yes Figure 2 A magnified view of section B in the image.

[0021] Label Explanation:

[0022] 1. Electrode plate; 2. Housing; 11. Terminal block; 21. Limiting pin; 22. Boss; 23. Support column; 111. Open notch. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Please refer to the appendix. Figure 1 To be continued Figure 5 One embodiment of this utility model provides a terminal fixing structure for use in a film capacitor. It includes an electrode plate 1 and a housing 2. A terminal 11 is provided on the electrode plate 1, and an open notch 111 is formed on the side of the terminal 11. A limiting pin 21 is provided on the housing 2. The terminal 11 is positioned on the housing 2 by the limiting engagement between the open notch 111 and the limiting pin 21, ensuring the flatness of the terminal 11 on the housing 2. It is understood that in this embodiment, the limiting pin 21 on the housing 2 engages with the open notch 111 on the side of the terminal 11. This not only achieves the positioning and assembly of the terminal 11 with the housing 2, but also ensures the flatness of the terminal 11 on the housing 2. This improves the laser welding quality of the terminal 11, thereby ensuring the operational stability and service life of the capacitor.

[0026] Please refer to the appendix. Figure 1 To be continued Figure 5In one preferred embodiment, at least one open notch 111 is provided on both the left and right sides of the terminal 11. A plurality of limiting pins 21 corresponding to each open notch 111 are provided on the housing 2. The terminal 11 is positioned on the housing 2 by the limiting cooperation between the open notches 111 on both sides of the terminal 11 and the corresponding limiting pins 21, and the terminal 11 is limited in the left and right and front and back directions to ensure the flatness of the terminal 11 on the housing 2. During assembly, other components (such as capacitor cores) are assembled above and below the electrode plate 1. After all components of the film capacitor are assembled, the vertical movement of the terminal 11 relative to the housing 2 is effectively limited. Simultaneously, the open notches 111 on both sides of the terminal 11 engage with the corresponding limiting pins 21 on the housing 2 to effectively limit the left-right and front-back directions of the terminal 11. This prevents the terminal 11 from shifting or tilting relative to the housing 2, thus affecting its flatness and meeting the requirements of laser welding. This effectively ensures the flatness of the terminal 11 on the housing 2, improving welding quality. However, those skilled in the art should understand that in other embodiments, other numbers of open notches can be provided on both sides of the terminal 11, and the method is not limited to the specific implementation disclosed in this embodiment. For example, two or more open notches 111 can be provided on each side of the terminal 11. In addition, each electrode plate 1 of the capacitor is provided with three (or more) terminals 11, and each terminal 11 is positioned by at least two limiting pins 21, thereby effectively ensuring the stability and consistency of each terminal 11 during the welding process.

[0027] Please refer to the appendix. Figure 1 To be continued Figure 5 In one preferred embodiment, the limiting pin 21 is a cylindrical structure, while the open notch 111 is an arc-shaped notch structure. Preferably, in this embodiment, the open notch 111 is a semi-circular notch structure. In this embodiment, the limiting engagement between the semi-circular notch 111 and the cylindrical limiting pin 21 effectively ensures a tight fit, thereby improving the positioning stability of the terminal block 11 and enhancing the assembly flatness of the terminal block 11.

[0028] Please refer to the appendix. Figure 1 To be continued Figure 5 In one preferred embodiment, the limiting pin 21 and the housing 2 are integrally injection molded. In this embodiment, by configuring the limiting pin 21 and the housing 2 as an integrally injection molded structure, the assembly process of the limiting pin 21 can be reduced, and the defects of difficult assembly or inaccurate and unstable positioning of the terminal 11 due to assembly errors of the limiting pin 21 can be avoided.

[0029] Please refer to the appendix. Figure 1 To be continued Figure 5 In one preferred embodiment, a boss 22 corresponding to the bottom of the terminal 11 is provided on the housing 2. A gap of 0.1mm to 0.3mm is reserved between the top of the boss 22 and the bottom of the terminal 11 to form a stress relief space for the terminal 11 to release assembly stress. In this embodiment, during the assembly process, the stress relief space allows the terminal 11 to bend downwards to a certain extent to release assembly stress. Furthermore, when the terminal 11 is bent downwards, the boss 22 can effectively provide support and limit, preventing the terminal 11 from deforming or even breaking due to excessive bending, which would affect the welding quality of the terminal 11.

[0030] Please refer to the appendix. Figure 1 To be continued Figure 5 In one preferred embodiment, the top of the boss 22 and the bottom of the terminal 11 are both flat surfaces, and when they come into contact with each other, they can fit together tightly to form a surface-to-surface contact structure.

[0031] Please refer to the appendix. Figure 1 To be continued Figure 5 A soldering plane is formed on the top of the terminal block 11.

[0032] Please refer to the appendix. Figure 1 To be continued Figure 5 An embodiment of this utility model also provides a thin-film capacitor, including the terminal fixing structure described above.

[0033] Please refer to the appendix. Figure 1 To be continued Figure 5 In one preferred embodiment, the housing 2 is provided with a support column 23 for supporting the PCB board (not shown).

[0034] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A terminal fixing structure, characterized in that: The device includes an electrode plate (1) and a housing (2). A terminal block (11) is provided on the electrode plate (1). An open notch (111) is provided on the side of the terminal block (11). A limiting pin (21) is provided on the housing (2). The terminal block (11) is positioned on the housing (2) by the limiting cooperation between the open notch (111) and the limiting pin (21) and the limiting pin (21) and the terminal block (11) are ensured to have a flatness of installation on the housing (2).

2. The terminal fixing structure according to claim 1, characterized in that: At least one open notch (111) is provided on both the left and right sides of the terminal (11). Multiple limiting pins (21) corresponding to each open notch (111) are provided on the housing (2). The terminal (11) is positioned on the housing (2) by the limiting cooperation between the open notches (111) on both sides of the terminal (11) and the corresponding limiting pins (21), and the terminal (11) is limited in the left and right and front and back directions, and the installation flatness of the terminal (11) on the housing (2) is ensured.

3. The terminal fixing structure according to claim 1, characterized in that: The limiting pin (21) is a cylindrical structure, while the open notch (111) is an arc notch structure.

4. The terminal fixing structure according to claim 3, characterized in that: The open gap (111) is a semi-circular gap structure.

5. The terminal fixing structure according to claim 3, characterized in that: The limiting pin (21) and the shell (2) are integrally injection molded structures.

6. The terminal fixing structure according to any one of claims 1 to 5, characterized in that: The housing (2) is provided with a boss (22) corresponding to the bottom of the terminal (11). A gap of 0.1mm to 0.3mm is reserved between the top of the boss (22) and the bottom of the terminal (11) to form a stress release space for the terminal (11) to release assembly stress.

7. The terminal fixing structure according to claim 6, characterized in that: The top of the boss (22) and the bottom of the terminal block (11) are both flat surfaces.

8. The terminal fixing structure according to claim 6, characterized in that: A soldering plane is formed on the top of the terminal block (11).

9. A thin-film capacitor, characterized in that: Includes the terminal fixing structure as described in any one of claims 1 to 8.

10. The thin-film capacitor according to claim 9, characterized in that: The housing (2) is provided with support columns (23) for supporting the PCB board.

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