Capacitor resistant to thermal shock

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By using the combination of concave and convex structure clamping and sealant in the capacitor, the problem of loosening and moisture intrusion of the capacitor under hot and cold impact is solved, stable connection and moisture-proof effects are achieved, and device life is extended.

CN222440363UActive Publication Date: 2025-02-07GUANGDONG FENGMING ELECTRONICS TECH

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Patent Information

Application Number: CN202420967627.3
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-05-07
Publication Date: 2025-02-07
Estimated Expiration: 2034-05-07

AI Technical Summary

Technical Problem

Existing capacitors are prone to loosening under the impact of hot and cold, causing moisture to invade the components and shorten the device life.

Method used

The clamping and coupling of the concave and convex structure is adopted to clamp the connection part of the metal shell and the clamping groove of the insulating upper cover through the clamping part, and a tight connection is achieved with the help of sealing glue to prevent shelling and moisture intrusion.

Benefits of technology

It effectively solves the problem that capacitors are easily separated and loosened under hot and cold impact, realizes the stability and moisture-proof performance of the connection structure, and extends the life of the device.

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Abstract

The utility model discloses a cold and hot shock resistant capacitor, which relates to the technical field of capacitors, and comprises a metal shell, which is provided with an accommodating cavity and a top opening communicated with the accommodating cavity, and a clamping part is formed on the inner side of the top of the metal shell; the insulating upper cover is provided with a clamping groove, the clamping part is connected with the clamping groove in a clamping manner, and the insulating upper cover is provided with a through hole communicated with the accommodating cavity; the core package is placed in the accommodating cavity, an electrode is arranged at the top of the core package, and the electrode extends out of the insulating upper cover through the through hole; and the filling and sealing body is filled in the accommodating cavity and wraps the outer part of the core package. The capacitor resistant to cold and hot impact is stable in connection structure, anti-shelling and capable of avoiding invasion of moisture.

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Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor resistant to cold and hot shocks. Background Art

[0002] Capacitors play an important role in tuning, bypassing, coupling, filtering and other circuits. The metal shell of the capacitor has the advantages of high mechanical strength, fast thermal conductivity, and good moisture resistance. It plays a role in protecting the internal core components in electronic components. The insulating cover is generally made of plastic materials such as PP, PBT, PPS, etc., which plays the role of electrical insulation to prevent the busbar connected to the electrode from short-circuiting with the metal shell.

[0003] At present, the insulating cover is connected to the metal shell by direct insertion, that is, the insulating cover and the metal shell are snap-connected by surface contact. When the components are subjected to hot and cold shocks, the detachment force generated by the thermal expansion and contraction of the potting body is greater than its bonding force with the metal shell, the potting body and the shell are easily separated and loosened. Once the shell is loose, moisture can easily invade the interior of the component, greatly reducing the life of the component. Utility Model Content

[0004] The main purpose of the utility model is to provide a capacitor resistant to cold and heat shocks, aiming to provide a capacitor resistant to cold and heat shocks with a stable connection structure, anti-shelling and moisture intrusion prevention.

[0005] In order to achieve the above-mentioned object, the utility model provides a capacitor resistant to thermal shock, and the capacitor resistant to thermal shock comprises:

[0006] A metal shell having a receiving cavity and a top opening communicating with the receiving cavity, wherein a clamping portion is formed on the inner side of the top of the metal shell;

[0007] An insulating upper cover, wherein the insulating upper cover is provided with a clamping groove, the clamping portion is clamped and connected with the clamping groove, and the insulating upper cover is provided with a through hole communicating with the accommodating cavity;

[0008] A core package, the core package is placed in the accommodating cavity, an electrode is provided on the top of the core package, and the electrode extends out of the insulating upper cover through the through hole;

[0009] A potting body is filled in the accommodating cavity and wrapped around the outside of the core package.

[0010] Optionally, the clamping portion is formed by bending or rolling the top of the metal shell inward.

[0011] Optionally, the insulating upper cover comprises:

[0012] A cover portion, the cover portion abutting against an upper end surface of the clamping portion;

[0013] A limiting portion, the limiting portion abutting against a lower end surface of the clamping portion;

[0014] A connecting portion is disposed between the cover portion and the limiting portion and forms the clamping groove.

[0015] Optionally, the limiting portion is an inverted first truncated cone, and the lower end surface of the clamping portion abuts against the upper end surface of the first truncated cone.

[0016] Optionally, the limiting portion includes an inverted second truncated cone and an annular flange, the annular flange is arranged between the connecting portion and the second truncated cone, and the lower end surface of the clamping portion abuts against the annular flange.

[0017] Optionally, the clamping groove is provided with a sealant, and the clamping portion is tightly connected by the sealant.

[0018] Optionally, the material of the sealant is silicone rubber, polyurethane resin or epoxy resin.

[0019] Optionally, the insulating upper cover is further provided with a filling port connected to the accommodating cavity.

[0020] Optionally, the material of the potting body is a polyurethane resin or an epoxy resin that cures at room temperature or high temperature.

[0021] Optionally, the metal shell is made of aluminum, aluminum alloy or stainless steel.

[0022] The technical solution of the utility model includes a metal shell, an insulating upper cover, a core package and a potting body, wherein the core package is placed inside the accommodating cavity of the metal shell, the clamping part of the metal shell is clamped and connected with the clamping groove of the insulating upper cover, and the potting body is filled in the accommodating cavity and wrapped around the outside of the core package. Since the technical means of anti-slipping is achieved by using the clamping match of the concave-convex structure, the technical problems of easy separation and loosening and moisture easily invading the components and greatly reducing the life of the components in the prior art by surface contact are effectively solved, thereby achieving the technical effects of stable connection structure, anti-shelling and moisture invasion prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a capacitor resistant to thermal shock of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the first embodiment of the utility model of a capacitor resistant to thermal shock;

[0025] Figure 3 It is a structural schematic diagram of the second embodiment of the utility model of the capacitor resistant to thermal shock;

[0026] Figure 4It is a structural schematic diagram of the third embodiment of the utility model of a capacitor resistant to thermal shock;

[0027] Figure 5 It is a structural schematic diagram of the fourth embodiment of the capacitor resistant to thermal shock of the utility model;

[0028] Description of Figure Numbers:

[0029] A capacitor 100 resistant to thermal shocks; a metal shell 10; a clamping portion 11; an insulating upper cover 20; a cover body 21; a through hole 211; a pouring port 212; a first truncated cone 221; a second truncated cone 222; an annular flange 223; a connecting portion 23; a clamping groove 24; a core package 30; an electrode 31; and a potting body 40. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] The utility model provides a capacitor 100 that is resistant to thermal shock.

[0035] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] In the embodiments of the present invention, Figures 1 to 5 As shown, the capacitor 100 resistant to cold and heat shocks includes a metal shell 10, an insulating upper cover 20, a core package 30 and a potting body 40, wherein the metal shell 10 has a accommodating cavity and a top opening connected to the accommodating cavity, and a clamping portion 11 is formed on the inner side of the top of the metal shell 10; the insulating upper cover 20 is provided with a clamping groove 24, the clamping portion 11 is clamped and connected with the clamping groove 24, and the insulating upper cover 20 is provided with a through hole 211 connected to the accommodating cavity; the core package 30 is placed in the accommodating cavity, and an electrode 31 is provided on the top of the core package 30, and the electrode 31 extends out of the insulating upper cover 20 through the through hole 211; the potting body 40 fills the accommodating cavity and wraps the outside of the core package 30.

[0037] In the utility model, an electrode 31 is first welded on the core package 30, and the electrode 31 is used to connect to an external power supply. When the core package 30 is placed in the accommodating cavity of the metal shell 10, the electrode 31 on the top of the core package 30 is led out through the through hole 211 of the insulating upper cover 20. The potting body 40 can be poured before the insulating upper cover 20 is installed or after the insulating upper cover 20 is installed. If the potting is performed after the insulating upper cover 20 is installed, the insulating upper cover 20 is provided with a pouring port 212 for pouring. The metal shell 10 and the insulating upper cover 20 of the utility model adopt a concave-convex structure to achieve a clamping fit. Specifically, the metal shell 10 is provided with a clamping portion 11, and the insulating upper cover 20 is provided with a clamping groove 24. The clamping portion 11 and the metal shell 10 can be an integrally formed structure, and can also be fixed at a specific position of the metal shell 10 by welding, bonding, etc. The clamping groove 24 is an annular groove structure. When the insulating upper cover 20 is assembled downward, the clamping portion 11 is clamped into the clamping groove 24 to achieve the installation of the insulating upper cover 20.

[0038] The technical solution of the utility model includes a metal shell 10, an insulating upper cover 20, a core package 30 and a potting body 40. The core package 30 is placed inside the accommodating cavity of the metal shell 10. The clamping portion 11 of the metal shell 10 is clamped and connected with the clamping groove 24 of the insulating upper cover 20. The potting body 40 is filled in the accommodating cavity and wrapped around the outside of the core package 30. Since the technical means of anti-slipping is achieved by using the concave-convex structure clamping and matching, the technical problems of easy separation and loosening and moisture easily invading the components and greatly reducing the life of the components in the prior art through surface contact are effectively solved, thereby achieving the technical effects of stable connection structure, anti-shelling and moisture invasion prevention.

[0039] In the embodiments of the present invention, Figures 2 to 5 As shown, the clamping portion 11 is formed by bending or rolling the top of the metal shell 10 inward.

[0040] The clamping portion 11 of the present invention is formed by the material of the metal shell 10 itself, and the clamping portion 11 has various shapes and can be formed by bending inward or winding inward. Figure 2 , Figure 3 and Figure 4 As shown, when the top of the metal shell 10 is bent inward to form the clamping portion 11, the clamping portion 11 can be bent to an angle that fits the inner wall of the metal shell 10, or can be bent to an angle that is perpendicular to the inner wall of the metal shell 10. In addition to the above-mentioned 180° and 90°, the clamping portion 11 can also form other angles, that is, as long as a clamping fit can be achieved. Figure 5 As shown, when the top of the metal shell 10 is wound inward to form the clamping portion 11 , the number of windings can be selected according to the depth of the clamping groove 24 , so that the wound clamping portion 11 can fit tightly with the clamping groove 24 .

[0041] In the embodiments of the present invention, Figures 2 to 5 As shown, the insulating upper cover 20 includes a cover body 21, a limiting portion and a connecting portion 23, wherein the cover body 21 abuts against the upper end surface of the clamping portion 11; the limiting portion abuts against the lower end surface of the clamping portion 11; the connecting portion 23 is arranged between the cover body 21 and the limiting portion, and forms a clamping groove 24. The cover body 21 of the utility model is further provided with an annular boss at a position corresponding to the through hole 211, and the annular boss can protect the electrode 31 and prevent the electrode 31 from being broken.

[0042] The limiting part of the utility model has different structures.

[0043] In one embodiment of the present invention, Figure 2As shown, the limiting portion is an inverted first truncated cone 221, and the lower end surface of the clamping portion 11 abuts against the upper end surface of the first truncated cone 221. The inverted truncated cone structure can play a guiding role, facilitating the assembly of the insulating upper cover 20. In addition, the upper end surface of the first truncated cone 221 cooperates with the clamping portion 11 to also play a limiting and clamping role.

[0044] In another embodiment of the present invention, Figures 3 to 5 As shown, the limiting portion includes an inverted second truncated cone 222 and an annular flange 223, the annular flange 223 is arranged between the connecting portion 23 and the second truncated cone 222, and the lower end surface of the clamping portion 11 abuts against the annular flange 223. The difference between the two embodiments is that the annular flange 223 is further provided in this embodiment, the structure of the second truncated cone 222 is the same as that of the first truncated cone 221, both of which are inverted truncated cone structures, which can play a guiding role and facilitate the assembly of the insulating upper cover 20, and the annular flange 223 plays a role of limiting and clamping, and the cross section of the annular flange 223 is semicircular, which is convenient for assembly.

[0045] In the embodiment of the utility model, the clamping groove 24 is provided with a sealant, and the clamping portion 11 is tightly connected by the sealant. In order to further improve the anti-loosening effect, improve the moisture-proof performance of the device, and extend the life of the device, the clamping portion 11 and the clamping groove 24 of the utility model are not only clamped, but also coated with a sealant to achieve an adhesive connection. When the sealant is cured, a sealed connection between the insulating upper cover 20 and the metal shell 10 can be achieved.

[0046] In the embodiment of the present invention, the material of the sealant is silicone rubber, polyurethane resin or epoxy resin.

[0047] In the embodiments of the present invention, Figure 1 As shown, the insulating upper cover 20 is also provided with a pouring port 212 communicating with the accommodating cavity. The potting body 40 of the utility model is poured after the insulating upper cover 20 is installed. There are two pouring ports 212 to facilitate exhaust during the pouring process. The insulating upper cover 20 of the utility model and the metal shell 10 are sealed by a sealant. After the sealant is cured, resin is poured from the pouring port 212 at the top of the insulating upper cover 20 to complete the device packaging.

[0048] In the embodiment of the present invention, the material of the potting body 40 is a polyurethane resin or an epoxy resin that is cured at room temperature or high temperature.

[0049] In the embodiment of the present invention, the material of the metal housing 10 is aluminum, aluminum alloy or stainless steel.

[0050] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A capacitor resistant to thermal shock, characterized in that: The thermal shock resistant capacitor comprises: A metal shell having a receiving cavity and a top opening communicating with the receiving cavity, wherein a clamping portion is formed on the inner side of the top of the metal shell; An insulating upper cover, wherein the insulating upper cover is provided with a clamping groove, the clamping portion is clamped and connected with the clamping groove, and the insulating upper cover is provided with a through hole communicating with the accommodating cavity; A core package, the core package is placed in the accommodating cavity, an electrode is provided on the top of the core package, and the electrode extends out of the insulating upper cover through the through hole; A potting body is filled in the accommodating cavity and wrapped around the outside of the core package.

2. The thermal shock resistant capacitor according to claim 1, characterized in that: The clamping portion is formed by bending or rolling the top of the metal shell inwardly.

3. The thermal shock resistant capacitor according to claim 1, characterized in that: The insulating upper cover comprises: A cover portion, the cover portion abutting against an upper end surface of the clamping portion; A limiting portion, the limiting portion abutting against a lower end surface of the clamping portion; A connecting portion is disposed between the cover portion and the limiting portion and forms the clamping groove.

4. The thermal shock resistant capacitor according to claim 3, characterized in that: The limiting portion is an inverted first truncated cone, and the lower end surface of the clamping portion abuts against the upper end surface of the first truncated cone.

5. The thermal shock resistant capacitor according to claim 3, characterized in that: The limiting portion includes an inverted second truncated cone and an annular flange, wherein the annular flange is arranged between the connecting portion and the second truncated cone, and the lower end surface of the clamping portion abuts against the annular flange.

6. The thermal shock resistant capacitor according to any one of claims 1 to 5, characterized in that: The clamping groove is provided with sealant, and the clamping part is tightly connected by the sealant.

7. The thermal shock resistant capacitor according to claim 6, characterized in that: The material of the sealant is silicone rubber, polyurethane resin or epoxy resin.

8. The thermal shock resistant capacitor according to any one of claims 1 to 5, characterized in that: The insulating upper cover is also provided with a filling port communicating with the accommodating cavity.

9. The thermal shock resistant capacitor according to any one of claims 1 to 5, characterized in that: The material of the potting body is polyurethane resin or epoxy resin that is cured at room temperature or high temperature.

10. The thermal shock resistant capacitor according to any one of claims 1 to 5, characterized in that: The material of the metal shell is aluminum, aluminum alloy or stainless steel.