An explosion-proof and leakage-proof shell structure of a solid capacitor

Abstract

The utility model provides a kind of explosion-proof and leakage-proof shell structure of solid capacitor, including shell, shell includes lower shell and upper shell, the bottom of lower shell is provided with the base that is outwardly convex, for stabilizing shell, the outer side of lower shell is fixedly connected with protective strip, lower shell bottom upper end surface is provided with pin protection sleeve, the top inner wall of lower shell is fixedly connected with inboard edge strip, the upper end surface of inboard edge strip is provided with guide hole, the lower end surface of upper shell is fixedly connected with guide column;Lower shell is provided with mounting assembly inside, for installing solid capacitor.The utility model sets up heat dissipation hole on upper shell, cooperate lower shell heat dissipation cavity, heat is dissipated immediately, prevent the risk of bulging and explosion caused by internal pressure sudden rise;Lower shell bottom is provided with pin protection sleeve, positive and negative pole pin is inserted into protection sleeve, avoid pin skew, misplacement, while pin protection sleeve provides external support for pin, prevent pin from shaking after welding.

Description

Technical Field

[0001] This utility model relates to the field of solid-state capacitor technology, specifically to an explosion-proof and leakage-proof housing structure for a solid-state capacitor. Background Technology

[0002] Solid-state capacitors, as an upgrade of traditional liquid electrolytic capacitors, use solid electrolytes (such as polymer conductive materials) instead of liquid electrolytes. They have significant advantages such as high temperature resistance, long lifespan, and low ESR (equivalent series resistance), and are widely used in electronic equipment fields such as computer motherboards, power modules, and new energy vehicles. However, solid-state capacitors have poor protection performance. In the event of current leakage, their state cannot be detected, and they are prone to electric shock when touched, posing a threat to the personal safety of workers.

[0003] A search revealed that application number CN202323334953.5 discloses a solid-state capacitor with a protective shell, including a mounting shell. A limiting platform is fixedly connected to the lower surface of the mounting shell, and a fixing rod is fixedly connected to the lower surface of the limiting platform. A conductive plate is fixedly connected to the inner wall of the mounting shell. A base is provided on the lower surface of the limiting platform, and a groove is formed on the lower surface of the base. An insulating block is fixedly connected to the upper surface of the base, and a second conductive plate is fixedly connected to the upper surface of the insulating block. This solid-state capacitor with a protective shell mounts the capacitor body on the second conductive plate, and then the mounting shell covers the base, ensuring contact between the first and second conductive plates. This prevents conductivity on the mounting shell and base, thus preventing electric shock accidents to the installer or those in contact with the capacitor. The fixing rod is then inserted into a through hole and tightened with a fixing nut to ensure the stability of the connection between the mounting shell and the base. This also prevents foreign objects from entering and affecting the capacitor's lifespan, and expands the capacitor's application range.

[0004] However, when using the aforementioned mounting case, the positive and negative leads of the capacitor are completely exposed outside the case. When not soldered, the leads are usually of a certain length for easy trimming, making them prone to puncturing the packaging bag during storage and transportation. Additionally, the positive and negative leads of the solid capacitor may become misaligned due to external collisions. Furthermore, the aforementioned mounting case is a closed structure with a small internal space and a lack of effective heat dissipation channels, making it difficult for the heat generated by the solid capacitor to dissipate during operation. Long-term use can easily lead to electrolyte thermal runaway, causing the capacitor to bulge or even explode, posing a certain risk. Utility Model Content

[0005] The purpose of this invention is to provide an explosion-proof and leakage-proof housing structure for solid capacitors to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An explosion-proof and leakage-proof housing structure for a solid capacitor, comprising:

[0008] The housing includes a lower housing and an upper housing. The bottom of the lower housing has an outwardly protruding base for stabilizing the housing. A protective strip is fixedly connected to the outer side of the lower housing. A pin protection sleeve is provided on the upper end face of the bottom of the lower housing. An inner side strip is fixedly connected to the inner wall of the top of the lower housing. A guide hole is opened on the upper end face of the inner side strip. A guide post is fixedly connected to the lower end face of the upper housing. When the guide post is inserted into the guide hole, the upper housing and the lower housing are closed to protect the internal solid capacitor.

[0009] The lower housing contains a mounting assembly for mounting solid-state capacitors.

[0010] Preferably, the mounting assembly includes a support ring, which is fixedly connected to the inner wall of the bottom of the lower housing, and a boss is fixedly connected to the inner edge of the upper end face of the support ring for contacting the solid capacitor.

[0011] Preferably, an auxiliary fixing strip is fixedly connected to the outer edge of the upper end face of the support ring, and the inner edge of the auxiliary fixing strip is an arc-shaped surface with the same curvature as the outer wall of the solid capacitor.

[0012] Preferably, a heat dissipation cavity is formed inside the lower housing between the auxiliary fixing strips, and the heat dissipation cavity is connected to the inner cavity of the upper housing.

[0013] Preferably, the top of the upper housing is provided with a first heat dissipation hole, and the side of the upper housing is provided with a second heat dissipation hole, which is used to cooperate with the heat dissipation cavity for heat dissipation.

[0014] Preferably, the upper surface of the solid capacitor is provided with a second guide mark, and the upper surface of the lower housing is provided with a first guide mark. When the second guide mark is aligned with the first guide mark, the solid capacitor is inserted, and the positive and negative leads of the solid capacitor are inserted into the lead protection sleeve.

[0015] Preferably, a support plate is fixedly connected to the center of the support ring.

[0016] Preferably, the height of the upper end face of the support plate is the same as the height of the upper end face of the boss.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention constructs a heat dissipation channel by opening a first heat dissipation hole and a second heat dissipation hole in the upper and lower shells and forming a heat dissipation cavity between the auxiliary fixing strips. This effectively dissipates the heat generated by the solid capacitor during operation and avoids the risk of bulging and explosion caused by electrolyte aging and decomposition due to excessive temperature and sudden increase in internal pressure.

[0019] In this invention, the boss, support plate, and auxiliary fixing strip are all made of rubber. The good insulation of rubber effectively isolates the capacitor from the shell, enhances the electrical isolation effect of the overall structure, prevents leakage current from the solid capacitor from being conducted to other components, and ensures the safety of the motherboard and the personal safety of the operator.

[0020] In this invention, a pin protection sleeve is provided inside the lower housing. It works in conjunction with the second guide mark on the solid capacitor and the first guide mark on the lower housing. When the capacitor is inserted, the positive and negative pins can be accurately guided into the protection sleeve, avoiding pin skew or misalignment. At the same time, the pin protection sleeve provides external support for the pins and prevents the pins from shaking after soldering.

[0021] This invention features an auxiliary fixing strip with an inner edge that matches the curvature of the outer wall of the solid capacitor. When the capacitor is installed, its elastic deformation generates an inward wrapping force, which acts like a flexible clamp to firmly fix the capacitor. Furthermore, the high surface friction prevents the capacitor from shifting during installation and use, thus improving the stability of the capacitor installation. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a three-dimensional schematic diagram of the solid capacitor mounted on the lower housing of this utility model;

[0024] Figure 3 This utility model Figure 1 Another perspective 3D illustration;

[0025] Figure 4 This is a three-dimensional schematic diagram of the upper shell of this utility model when opened;

[0026] Figure 5 This is a three-dimensional schematic diagram of the lower shell of this utility model;

[0027] Figure 6 This is a three-dimensional schematic diagram of the internal structure of the lower shell of this utility model;

[0028] Figure 7 This is a three-dimensional schematic diagram of the solid capacitors installed inside the upper and lower shells of this utility model.

[0029] Figure 8 This is a three-dimensional schematic diagram of the internal structure of the lower housing of this utility model, in which a solid capacitor is installed.

[0030] In the diagram: 1. Lower housing; 101. Base; 102. Protective strip; 103. Inner side strip; 104. Guide hole; 105. First guide mark; 2. Upper housing; 201. First heat dissipation hole; 202. Second heat dissipation hole; 203. Guide post; 3. Auxiliary fixing strip; 4. Solid capacitor; 401. Positive pin; 402. Negative pin; 403. Second guide mark; 5. Support ring; 501. Boss; 502. Support plate; 6. Heat dissipation cavity; 7. Pin protective sleeve. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example:

[0033] Please see Figures 1 to 8 This utility model provides a technical solution:

[0034] An explosion-proof and leakage-proof housing structure for a solid capacitor, comprising:

[0035] The outer casing includes a lower casing 1 and an upper casing 2. The bottom of the lower casing 1 is provided with an outwardly protruding base 101 for stabilizing the casing. A protective strip 102 is fixedly connected to the outer side of the lower casing 1. A pin protection sleeve 7 is provided on the upper end face of the bottom of the lower casing 1. An inner side strip 103 is fixedly connected to the inner wall of the top of the lower casing 1. A guide hole 104 is opened on the upper end face of the inner side strip 103. A guide post 203 is fixedly connected to the lower end face of the upper casing 2. When the guide post 203 is inserted into the guide hole 104, the upper casing 2 and the lower casing 1 are closed to protect the internal solid capacitor 4.

[0036] The lower housing 1 is provided with an installation assembly for installing the solid capacitor 4.

[0037] Specifically, the protective strip 102 is preferably made of rubber, which has good insulation properties. Operators can use their fingers to hold the protective strips 102 on both sides to remove the lower housing 1, preventing electric shock.

[0038] Specifically, the solid-state capacitor 4 is a capacitor that uses a solid electrolyte (such as a polymer conductive material) instead of a traditional liquid electrolyte. It is mainly composed of aluminum / ceramic electrodes, a solid electrolyte, an insulating medium, and a shell. The electrolyte is in the form of solid powder or colloidal filling between the electrodes.

[0039] In this embodiment, the outer shell is divided into a lower shell 1 and an upper shell 2. The upper inner wall of the lower shell 1 has inner side strips 103 on both sides. The upper end face of the inner side strips 103 is provided with guide holes 104. The lower end face of the upper shell 2 is fixedly connected to a guide post 203. The upper shell 2 and the lower shell 1 are positioned and connected by the interference fit between the guide post 203 and the guide hole 104. The outer diameter of the guide post 203 is slightly larger than the inner diameter of the guide hole 104 to ensure that an interference effect is generated when inserted. When the guide post 203 is inserted into the guide hole 104, the interference contact between the two generates friction, preventing the upper shell 2 from moving upward and causing the upper shell 2 to detach and be fixed.

[0040] Specifically, the outer casing can be reused. When the motherboard malfunctions and it is found through tools that the capacitor is damaged and needs to be replaced, the upper casing 2 can be pulled out by pulling upwards, the pin soldering can be removed, and the solid capacitor 4 can be taken out for replacement.

[0041] Specifically, the inner side strip 103 and the guide hole 104 are long enough to ensure that the guide post 203 will not easily detach from the guide hole 104 in the event of strong vibration or high-frequency shaking.

[0042] Specifically, the upper surface of the solid capacitor 4 is provided with a second guide mark 403, and the upper surface of the lower housing 1 is provided with a first guide mark 105. When the second guide mark 403 is aligned with the first guide mark 105, the solid capacitor 4 is inserted, and the positive terminal pin 401 and the negative terminal pin 402 of the solid capacitor 4 are inserted into the pin protection sleeve 7.

[0043] In this embodiment, a first guide mark 105 and a second guide mark 403 are respectively provided on the lower housing 1 and the solid capacitor 4, providing intuitive visual guidance for the operator. When the second guide mark 403 of the solid capacitor 4 is aligned with the first guide mark 105 of the lower housing 1, the fixed capacitor can be quickly inserted into the lower housing 1. The solid capacitor 4 usually has two pins, one positive pin 401 and one negative pin 402. Two pin protection sleeves 7 are provided on the inner bottom of the lower housing 1 to guide the pins to the bottom of the lower housing 1, avoiding problems such as pin misalignment and skewing, and facilitating wiring. By combining the guide mark with the pin protection sleeve 7, the pins can be guided to the correct position and protected while the solid capacitor 4 is quickly inserted.

[0044] Specifically, the mounting assembly includes a support ring 5, which is fixedly connected to the bottom inner wall of the lower housing 1. A boss 501 is fixedly connected to the inner edge of the upper end face of the support ring 5 for contacting the solid capacitor 4.

[0045] Specifically, an auxiliary fixing strip 3 is fixedly connected to the outer edge of the upper end face of the support ring 5. The inner edge of the auxiliary fixing strip 3 is an arc-shaped surface with the same curvature as the outer wall curvature of the solid capacitor 4.

[0046] Specifically, a support plate 502 is fixedly connected to the center of the support ring 5.

[0047] Specifically, the height of the upper end face of the support plate 502 is the same as the height of the upper end face of the boss 501.

[0048] In this embodiment, the support ring 5 is preferably made of metal. The high strength of metal provides a stable and rigid support foundation for the solid capacitor 4. The boss 501 and the support plate 502 are made of rubber. Utilizing the good elasticity of rubber, it will produce appropriate deformation when in contact with the solid capacitor 4. This can not only tightly fit the capacitor surface to enhance the support stability, but also effectively isolate the support ring 5 from the capacitor electrode due to the insulating properties of rubber, preventing leakage current from the solid capacitor 4 from being conducted to other components and damaging the motherboard or operators, thus ensuring safety.

[0049] The auxiliary fixing strip 3 is also made of rubber. When the solid capacitor 4 is installed, the arc-shaped surface of the inner edge of the auxiliary fixing strip 3 fits tightly against the outer wall of the capacitor. The elastic deformation of the rubber itself generates an inward wrapping force, which firmly fixes the capacitor like a flexible clamp. The surface of the rubber auxiliary fixing strip 3 has a certain friction, which can prevent the capacitor from shifting during installation or use. The insulation of the rubber enhances the electrical isolation effect of the overall structure, further preventing the solid capacitor 4 from leaking current and damaging other components and operators.

[0050] Specifically, a heat dissipation cavity 6 is formed inside the lower housing 1 between the auxiliary fixing strips 3, and the heat dissipation cavity 6 is connected to the inner cavity of the upper housing 2.

[0051] Specifically, the top of the upper housing 2 is provided with a first heat dissipation hole 201, and the side of the upper housing 2 is provided with a second heat dissipation hole 202, which are used to cooperate with the heat dissipation cavity 6 for heat dissipation.

[0052] Specifically, the outer casing is preferably made of metal, which has good heat absorption and dissipation properties, and auxiliary heat dissipation holes are used for heat dissipation.

[0053] In this embodiment, auxiliary fixing strips 3 are evenly distributed on the outer ring of the upper end face of the support ring 5, and adjacent auxiliary fixing strips 3 are spaced with the same size. These spaces form heat dissipation cavities 6 (e.g., Figure 5Because the bottom is blocked by the support ring 5, the heat dissipation cavity 6 is connected to the inner cavity of the upper shell 2. Heat diffuses upward along this connecting channel. The top of the upper shell 2 has a first heat dissipation hole 201 and the side has a second heat dissipation hole 202, forming a heat dissipation outlet. The bulging and explosion of the solid capacitor 4 is mainly caused by internal thermal runaway due to abnormal temperature. When the operating environment temperature exceeds the rated range, such as being in a high-temperature environment for a long time, the electrolyte of the solid capacitor 4 will age and decompose faster, generating a large amount of heat and gas, which will increase the internal pressure. The existing mounting shell encloses the solid capacitor 4, which has a small internal space and makes it difficult to dissipate heat. By opening the first heat dissipation hole 201, the second heat dissipation hole 202 and the heat dissipation cavity 6 in the shell, heat can be dissipated normally, preventing the capacitor from bulging and exploding, while maintaining the protective function of the shell for the solid capacitor 4.

[0054] In this embodiment, the solid-state capacitor 4 is often connected by soldering. The soldering process often requires trimming the leads to maintain stability after soldering. However, in actual operation, manual operation may result in errors and misjudgments. If the leads are trimmed too long, the solid-state capacitor 4 will easily wobble after soldering, leading to instability. If they are trimmed too short, there are fewer solderable parts, making it difficult to ensure a strong solder joint. A distance is left between the support ring 5 and the lead protective sleeve 7 inside the lower housing 1 (e.g., ...). Figure 7 The pins are modified so that only a portion of the pins are exposed for soldering, so that the pins do not need to be trimmed too much. The pin protection sleeve 7 provides external support for the pins, which can prevent the pins from bending after soldering and prevent them from shaking.

[0055] In use, the upper housing 2 is first pulled out upwards to release the fixation between the guide hole 104 and the guide post 203. The operator aligns the second guide mark 403 of the solid capacitor 4 with the first guide mark 105 of the lower housing 1 and inserts it. At this time, the positive and negative leads 402 of the solid capacitor 4 will fall precisely into the lead protection sleeve 7. The bottom of the solid capacitor 4 contacts the protrusion 501 of the support ring 5 and the support plate 502. The arc-shaped surface of the auxiliary fixing strip 3 wraps around the outer wall of the capacitor through the elastic deformation of the rubber, completing the stable installation. The guide post 203 of the upper housing 2 is aligned with the guide hole 104 of the lower housing 1. With the friction of the interference fit and the tight contact, the upper housing 2 is pressed down and closed, forming all-round protection for the solid capacitor 4. Then, the welding and wiring can be carried out.

[0056] All other parts of this utility model not described herein are the same as existing technologies, or are known technologies, or can be implemented using existing technologies, and will not be described in detail here.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A solid capacitor's explosion-proof and leakage-proof housing structure, characterized in that, include: The outer shell includes a lower shell (1) and an upper shell (2). The bottom of the lower shell (1) is provided with an outwardly protruding base (101) for stabilizing the shell. A protective strip (102) is fixedly connected to the outer side of the lower shell (1). A pin protection sleeve (7) is provided on the upper end face of the bottom of the lower shell (1). An inner side strip (103) is fixedly connected to the inner wall of the top of the lower shell (1). A guide hole (104) is opened on the upper end face of the inner side strip (103). A guide post (203) is fixedly connected to the lower end face of the upper shell (2). When the guide post (203) is inserted into the guide hole (104), the upper shell (2) and the lower shell (1) are closed to protect the internal solid capacitor (4). The lower housing (1) is provided with an installation assembly for installing solid capacitors (4).

2. The explosion-proof and leakage-proof housing structure for a solid capacitor according to claim 1, characterized in that: The mounting assembly includes a support ring (5), which is fixedly connected to the bottom inner wall of the lower housing (1). A boss (501) is fixedly connected to the inner edge of the upper end face of the support ring (5) for contacting the solid capacitor (4).

3. The explosion-proof and leakage-proof housing structure of a solid capacitor according to claim 2, characterized in that: An auxiliary fixing strip (3) is fixedly connected to the outer edge of the upper end face of the support ring (5). The inner edge of the auxiliary fixing strip (3) is an arc-shaped surface with the same arc as the outer wall arc of the solid capacitor (4).

4. The explosion-proof and leakage-proof housing structure of a solid capacitor according to claim 3, characterized in that: The lower housing (1) forms a heat dissipation cavity (6) between the auxiliary fixing strips (3), and the heat dissipation cavity (6) is connected to the cavity inside the upper housing (2).

5. The explosion-proof and leakage-proof housing structure of a solid capacitor according to claim 4, characterized in that: The top of the upper housing (2) is provided with a first heat dissipation hole (201), and the side of the upper housing (2) is provided with a second heat dissipation hole (202) for use in conjunction with the heat dissipation cavity (6) for heat dissipation.

6. The explosion-proof and leakage-proof housing structure of a solid capacitor according to claim 1, characterized in that: The upper end face of the solid capacitor (4) is provided with a second guide (403), and the upper end face of the lower housing (1) is provided with a first guide (105). When the second guide (403) is aligned with the first guide (105), the solid capacitor (4) is inserted. The positive terminal (401) and negative terminal (402) of the solid capacitor (4) are inserted into the pin protection sleeve (7).

7. The explosion-proof and leakage-proof housing structure for a solid-state capacitor according to claim 2, characterized in that: The support ring (5) is fixedly connected to the center of the support plate (502).

8. The explosion-proof and leakage-proof housing structure of a solid capacitor according to claim 7, characterized in that: The height of the upper end face of the support plate (502) is the same as the height of the upper end face of the boss (501).

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