Capacitor cover plate and capacitor

Abstract

The utility model discloses a capacitor cover plate, comprising a cover plate body and a wiring terminal, the cover plate body is provided with a protruding part, and the protruding part is provided with a welding groove; the wiring terminal is provided with a welding section, the welding section is welded to the welding groove, and the side wall of the welding groove is arranged on the periphery of the welding section in a surrounding mode. A capacitor comprises a shell, an electrode core and a capacitor cover plate. When in use, due to the arrangement of the lug boss on the cover plate body, the strength of the position of the outgoing line terminal is increased, and the deformation resistance of the position of the terminal of the cover plate is improved. Besides, the welding groove is formed in the cover plate body, so that in the welding process of the wiring terminal, the side wall of the welding groove can play a role in restraining tin liquid used during welding, the tin liquid is prevented from overflowing to the surface of the cover plate, the tin liquid is concentrated in the groove, the welding strength is improved, and the stability of electrical connection is improved. Meanwhile, the risk that tin liquid overflows the end face of the cover plate can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, and in particular to a capacitor cover plate and a capacitor. Background Technology

[0002] Currently, most capacitors on the market adopt a low-voltage cover design. The design standards for structural strength and stability are usually based on the requirements of low-voltage environments. They have limited ability to withstand external impacts, thermal stresses, etc. When applied to scenarios with higher requirements or when facing special stresses during manufacturing or explosion-proof processes, they are prone to deformation, which limits their application range.

[0003] In addition, the ends of the terminals used to connect to the cover plate are usually not treated, which may cause molten solder to overflow onto the surface of the cover plate during soldering. This not only seriously weakens the soldering strength, but also has a negative impact on the appearance of the product. Utility Model Content

[0004] To overcome at least one of the defects described in the prior art, one objective of this utility model is to provide a capacitor cover plate that, by providing a protrusion, enhances the structural strength of the entire cover plate and effectively reduces the probability of deformation. Simultaneously, welding grooves are provided on the protrusion for welding terminals, reducing the risk of molten solder overflowing onto the cover plate surface.

[0005] The second objective of this utility model is to provide a capacitor with an increased strength of the capacitor cover plate, reducing the probability of deformation during subsequent use, and with high welding strength of the wiring terminals, improving the reliability of the electrical connection.

[0006] One of the objectives of this utility model is achieved through the following technical solution:

[0007] A capacitor cover includes a cover body and a terminal block. The cover body has a protrusion and a welding groove. The terminal block has a welding section, which is welded to the welding groove. The sidewall of the welding groove surrounds the outer periphery of the welding section.

[0008] Furthermore, the protrusion is also provided with a boss, and the welding groove is provided on the boss.

[0009] Furthermore, the cover plate body is provided with at least one reinforcing rib, and at least one of the reinforcing ribs is provided on the boss.

[0010] Furthermore, the boss is provided with at least two welding grooves, and the wiring terminal is provided with at least two, with each pair of adjacent wiring terminals spaced apart and welded into the welding groove respectively.

[0011] Furthermore, at least one reinforcing rib is provided between every two adjacent terminals.

[0012] Furthermore, the terminal block is provided with a wire hole, and the cover plate body is provided with a wire hole. The wire hole is located in the welding groove, and the wire hole is used to conduct electricity with the wire hole after the terminal block is installed in the welding groove.

[0013] Furthermore, the cover plate body is also provided with a liquid injection hole, which penetrates the cover plate body.

[0014] Furthermore, the cover plate body is provided with a liquid guiding column, the liquid guiding column protrudes from the cover plate body, and the liquid injection hole is located on the liquid guiding column and penetrates the liquid guiding column.

[0015] Furthermore, a shielding ring is provided at the top of the liquid guiding column, the shielding ring extends along the periphery of the liquid guiding column and surrounds the outer periphery of the injection hole.

[0016] The technical solution adopted for the second objective of this utility model is:

[0017] A capacitor includes a housing, an electrode core, and a capacitor cover plate, wherein the electrode core is disposed inside the housing, and the capacitor cover plate is used to seal the housing.

[0018] In summary, the capacitor cover and capacitor provided by this utility model have the following technical effects:

[0019] During use, the protrusions on the cover plate enhance its resistance to deformation, thus better protecting the electrode core inside the housing and reducing the probability of internal short circuits, open circuits, and other faults caused by cover plate deformation, making it safer to use.

[0020] Furthermore, by providing welding grooves on the cover plate body, the sidewalls of the welding grooves can restrain the molten solder used during welding, preventing it from overflowing onto the cover plate surface. This concentrates the molten solder within the grooves, increasing welding strength and improving the stability of the electrical connection. Simultaneously, it reduces the risk of molten solder overflowing from the cover plate end face, resulting in a cleaner exterior for the cover plate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the cover plate body of this utility model;

[0023] Figure 3 This is a schematic diagram of the liquid-guiding column of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the terminal block of this utility model;

[0025] The meanings of the reference numerals in the attached figures are as follows:

[0026] 10. Cover plate body; 11. Protrusion; 111. Welding groove; 112. Boss; 113. Reinforcing rib; 12. Wire hole; 20. Terminal block; 21. Wire hole; 30. Liquid guide column; 31. Liquid injection hole; 32. Shielding ring. Detailed Implementation

[0027] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0028] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0030] Example 1,

[0031] See Figures 1 to 4 This utility model discloses a capacitor cover plate, including a cover plate body 10 and a terminal block 20. The cover plate body 10 is provided with a protrusion 11, and the protrusion 11 is provided with a welding groove 111. The terminal block 20 has a welding section, which is welded to the welding groove 111. The side wall of the welding groove 111 surrounds the outer periphery of the welding section.

[0032] Based on the above structure, by providing a protrusion 11 on the cover plate body 10, the geometry of the surface of the cover plate body 10 is changed by the protrusion 11. When an external force is applied to the cover plate, the protrusion 11 can disperse the external force to the surrounding flat area. In this way, after the terminal 20 is installed on the protrusion, when the terminal 20 is subjected to external impact or vibration, the protrusion 11 will transmit the force to the surrounding flat area, avoiding the force from concentrating in a small flat area, thereby reducing the possibility of local deformation. The protrusion 11 can better disperse stress, preventing the terminal 20 from deforming or loosening due to force, thus making the electrical connection more stable.

[0033] Furthermore, the combination of the protrusion 11 and the plane makes the force transmission path inside the cover plate body 10 more complex and diverse. The external force is no longer transmitted only along the plane direction, but multiple transmission paths are formed between the protrusion 11 and the plane. This allows the force to be distributed more evenly throughout the cover plate structure, improving the overall resistance of the cover plate to deformation. When subjected to external forces, it is more resistant to bending deformation. Thus, during the production, transportation and use of capacitors, the cover plate body 10 can better protect the internal components and reduce the probability of internal short circuits, open circuits and other faults caused by the deformation of the cover plate body 10.

[0034] Furthermore, when the terminal block 20 is connected to the cover plate body 10, the soldering section of the terminal block 20 can be placed in the soldering groove 111. During the soldering process, the molten solder will flow into the soldering groove 111 along the outer periphery of the soldering section and fill the soldering groove 111. At the same time, since the side wall of the soldering groove 111 acts as a barrier to the molten solder, the molten solder is concentrated in the soldering groove 111, thereby reducing the probability of the molten solder flowing to the end face of the cover plate during the soldering process, reducing the risk of molten solder residue on the surface of the cover plate, and improving the appearance quality of the product.

[0035] Meanwhile, since the sidewall of the welding groove 111 surrounds the outer periphery of the welding section, the molten solder can fill the space between the groove and the welding section during welding, which greatly increases the contact area between the two. The larger the contact area, the stronger the bonding force and the higher the welding strength, making the connection between the terminal 20 and the cover plate firm and not easy to loosen or fall off under these external forces. This allows the capacitor to maintain normal working condition even in harsh working environments, making it suitable for a wider range of applications.

[0036] It should be noted that the protrusion 11 in this embodiment can be integrally formed on the cover plate body 10 by means of a mold, so as to enhance the deformation resistance of the cover plate body 10. In addition, the welding groove 111 can be mechanically cut or integrally formed on the protrusion 11.

[0037] Furthermore, the protrusion 11 is also provided with a boss 112, and a welding groove 111 is provided on the boss 112.

[0038] Specifically, by setting the boss 112 on the protrusion 11, the deformation resistance of the welded part is further increased. At the same time, the weld at the welding groove 111 can be deeper and thicker, which can improve the load-bearing capacity of the welded joint. Especially under the condition of bearing large tensile, compressive or shear forces, it can better resist damage and improve the strength and stability of the welded structure.

[0039] More specifically, at least one reinforcing rib 113 is provided on the cover plate body 10. At least one reinforcing rib 113 is provided on the boss 112. The reinforcing rib 113 increases the structural strength of the boss 112 and the entire cover plate, enabling it to withstand greater external forces and pressures. Thus, when the cover plate is subjected to external loads, the reinforcing rib 113 can effectively disperse stress, preventing deformation and cracking of the boss 112 and the cover plate, thereby improving the load-bearing capacity of the cover plate and making it safer and more reliable during use.

[0040] Furthermore, the boss 112 is provided with at least two welding grooves 111, and the terminal block 20 is provided with at least two, with each pair of adjacent terminal blocks 20 spaced apart and welded into the welding groove 111 respectively.

[0041] Specifically, since the capacitor may need to be connected to multiple different circuits or devices during use, this embodiment provides multiple terminals 20 and multiple welding grooves 111 on the boss 112 to install the terminals 20. In this way, when the cover plate body 10 is connected to the capacitor body, the capacitor can be electrically connected to multiple electrical devices through the multiple terminals 20 on the multiple cover plate bodies 10.

[0042] In addition, at least one reinforcing rib 113 is provided between every two adjacent terminals 20. The reinforcing rib 113 makes the structure of the boss 112 and the entire cover plate more stable. When the cover plate is subjected to external pressure, tension or vibration, the reinforcing rib 113 can effectively disperse the stress and avoid damage to the boss 112 or terminal 20 due to stress concentration, thereby improving the reliability and service life of the entire structure.

[0043] Furthermore, the terminal block 20 is provided with a wire hole 21, and the cover plate body 10 is provided with a wire hole 12. The wire hole 12 is located in the welding groove 111. After the terminal block 20 is installed in the welding groove 111, the wire hole 21 is connected to the wire hole 12.

[0044] Specifically, after the cover plate body 10 of this embodiment is sealed on the outer shell of the capacitor, the wires inside the capacitor can pass through the wire hole 12 and be led out through the wire hole 21 to the terminal 20, so that the wires and the terminal 20 can be reliably electrically connected.

[0045] More specifically, by fixing the wire to the terminal 20 through the wire hole 21, the wire can be prevented from loosening or falling off due to external pulling or vibration during use, thereby ensuring the stability and reliability of the electrical connection.

[0046] Furthermore, the cover plate body 10 is also provided with an injection hole 31, which penetrates the cover plate.

[0047] Specifically, since insulating materials (such as insulating oil or potting compound) need to be introduced into the capacitor during the manufacturing process, liquid insulating materials can be introduced into the capacitor through the injection hole 31 after the cover plate body 10 is sealed to the capacitor shell. Since the injection hole 31 provides a dedicated injection channel, liquid insulating materials can be easily injected into the capacitor even after the cover plate body 10 is sealed to the capacitor shell, eliminating the need for complex insulating material filling operations during capacitor assembly and improving production efficiency.

[0048] Meanwhile, after the capacitor is assembled, liquid is injected to allow the liquid insulating material to better fill the internal space of the capacitor, including some narrow gaps and corners, expel impurities such as air, and form a uniform and continuous insulating layer, which effectively improves the insulation performance of the capacitor and reduces the occurrence of problems such as partial discharge.

[0049] Furthermore, the cover plate is provided with a liquid guiding column 30, which protrudes from the cover plate, and the liquid injection hole 31 is provided on the liquid guiding column 30 and penetrates through the liquid guiding column 30.

[0050] Specifically, the protrusion of the liquid guide column 30 from the cover plate provides a positioning mark for the liquid injection operation, enabling the operator to more accurately align the liquid injection equipment with the liquid injection hole 31, ensuring that the liquid insulating material is accurately injected into the capacitor, avoiding deviations during the liquid injection process, and improving the accuracy and reliability of the liquid injection.

[0051] In addition, the liquid guiding column 30 and the cover plate body 10 form an integral structure. During the liquid injection process, the liquid guiding column 30 can withstand a certain pressure, which can strengthen the local structure of the cover plate and reduce the deformation or damage of the cover plate body 10 caused by the liquid injection pressure.

[0052] It should be noted that during assembly, a through hole can be provided on the cover plate, and the liquid guiding column 30 can be correspondingly placed at the through hole so that after the liquid guiding column 30 is connected to the cover plate body 10, the injection hole 31 is connected to the through hole.

[0053] Furthermore, a shielding ring 32 is provided at the top of the liquid guiding column 30. The shielding ring 32 extends along the periphery of the liquid guiding column 30 and surrounds the outer periphery of the injection hole 31.

[0054] Specifically, by surrounding the injection hole 31 with the shielding ring 32, external dust, debris and other impurities can be prevented from falling directly into the injection hole 31 during the injection process, reducing the probability of impurities entering the capacitor with the insulating liquid and preventing the capacitor's performance and lifespan from being affected by the presence of impurities.

[0055] In addition, during the liquid injection process, the shielding ring 32 can play a certain blocking role, which can reduce the splashing of liquid insulating material when it overflows from the injection hole 31, help to keep the working environment clean, and also avoid waste of insulating liquid and pollution to surrounding equipment or products.

[0056] Example 2,

[0057] A capacitor includes a housing, an electrode core, and a capacitor cover plate as described in Embodiment 1. The electrode core is disposed inside the housing, and the capacitor cover plate is used to seal the housing.

[0058] Based on this, during assembly, the electrode core is first installed inside the housing, and the electrode core is electrically connected to the terminal 20 via a wire. Finally, the capacitor cover is placed on the outside of the housing to protect the internal structure of the housing.

[0059] Specifically, by providing a protrusion 11 on the cover plate body 10, the geometry of the cover plate body 10 surface is altered. When an external force is applied to the cover plate, the protrusion 11 can disperse the external force to the surrounding flat area. Thus, when the terminal 20 is installed on the protrusion, when the terminal 20 is subjected to external impact or vibration, the protrusion 11 transmits the force to its surrounding flat area, preventing the force from concentrating in a small flat area. This reduces the possibility of local deformation, allowing the protrusion 11 to better disperse stress and prevent the terminal 20 from deforming or loosening due to force, thereby making the electrical connection more stable.

[0060] Furthermore, the combination of the protrusion 11 and the plane makes the force transmission path inside the cover plate body 10 more complex and diverse. The external force is no longer transmitted only along the plane direction, but multiple transmission paths are formed between the protrusion 11 and the plane. This allows the force to be distributed more evenly throughout the cover plate structure, improving the overall resistance of the cover plate to deformation. When subjected to external forces, it is more resistant to bending deformation. Thus, during the production, transportation and use of capacitors, the cover plate body 10 can better protect the internal components and reduce the probability of internal short circuits, open circuits and other faults caused by the deformation of the cover plate body 10.

[0061] Furthermore, when the terminal block 20 is connected to the cover plate body 10, the soldering section of the terminal block 20 can be placed in the soldering groove 111. During the soldering process, the molten solder will flow into the soldering groove 111 along the outer periphery of the soldering section and fill the soldering groove 111. At the same time, since the side wall of the soldering groove 111 acts as a barrier to the molten solder, the molten solder is concentrated in the soldering groove 111, thereby reducing the probability of the molten solder flowing to the end face of the cover plate during the soldering process, reducing the risk of molten solder residue on the surface of the cover plate, and improving the appearance quality of the product.

[0062] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A capacitor cover plate, characterized in that, The device includes a cover plate body and a terminal block. The cover plate body has a protrusion and a welding groove. The terminal block has a welding section, which is welded to the welding groove. The sidewall of the welding groove surrounds the outer periphery of the welding section.

2. The capacitor cover plate as described in claim 1, characterized in that, The protrusion is further provided with a boss, and the welding groove is provided on the boss.

3. The capacitor cover plate as described in claim 2, characterized in that, The cover plate body is provided with at least one reinforcing rib, and at least one of the reinforcing ribs is provided on the boss.

4. The capacitor cover plate as described in claim 3, characterized in that, The boss is provided with at least two welding grooves, and the terminal block is provided with at least two, with each pair of adjacent terminals spaced apart and welded into the welding groove respectively.

5. The capacitor cover plate as described in claim 4, characterized in that, At least one reinforcing rib is provided between each pair of adjacent terminals.

6. The capacitor cover plate as described in claim 1, characterized in that, The terminal block is provided with a wire hole, and the cover plate body is provided with a wire hole. The wire hole is located in the welding groove, and the wire hole is used to conduct electricity with the wire hole after the terminal block is installed in the welding groove.

7. The capacitor cover plate according to any one of claims 1-6, characterized in that, The cover plate body is also provided with a liquid injection hole, which penetrates the cover plate body.

8. The capacitor cover plate as described in claim 7, characterized in that, The cover plate body is provided with a liquid guiding column, which protrudes from the cover plate body. The liquid injection hole is located on the liquid guiding column and penetrates through the liquid guiding column.

9. The capacitor cover plate as described in claim 8, characterized in that, The top of the liquid guiding column is provided with a shielding ring, which extends along the periphery of the liquid guiding column and surrounds the outer periphery of the injection hole.

10. A capacitor, characterized in that, It includes a housing, an electrode core, and a capacitor cover as described in any one of claims 1-9, wherein the electrode core is disposed within the housing, and the capacitor cover is used to seal the housing.

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