A protective structure, a shell and an aluminum electrolytic capacitor

Abstract

The present invention discloses a protective structure, a shell and an aluminum electrolytic capacitor. The protective structure comprises a protective shell and a plurality of protective feet. The protective shell is used to prevent internal electrolyte from overflowing when the capacitor is damaged. The protective feet are arranged at the lower part of the protective shell and are used to provide auxiliary support to the capacitor when the capacitor is installed. The present invention provides auxiliary support to the aluminum electrolytic capacitor during installation by using a shell with a protective structure, and prevents internal electrolyte from overflowing when the capacitor is damaged. The protective structure is mainly provided between an outer tube shell and an internal aluminum shell, and an explosion-proof valve on the upper end face of the aluminum shell is protected by the protective shell in the protective structure. When the internal electrolyte of the aluminum electrolytic capacitor overflows after being damaged, the overflowed electrolyte is in a space determined by the surface where the explosion-proof valve is located and the protective shell, that is, the diffusion of the overflowed liquid can be limited. At the same time, the protective feet in the protective structure can slide up and down to provide auxiliary support to the aluminum electrolytic capacitor during installation.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitors, and in particular to a protective structure, a shell and an aluminum electrolytic capacitor. Background Art

[0002] A capacitor is mainly composed of two conductors close to each other with a non-conductive insulating medium in between. When a voltage is applied between the two plates of a capacitor, the capacitor will store charge. The capacitance of a capacitor is numerically equal to the value of the charge on one conductive plate. The ratio of the voltage between the two plates. , , Aluminum electrolytic capacitors are made of aluminum cylinders as negative electrodes, which contain liquid , insert a curved To make the positive electrode. Processing, so that a layer of As a medium. Its characteristics are large capacity, but large leakage, poor stability, positive and negative polarity, suitable for power supply filtering or low-frequency circuits.

[0003] Commonly used capacitors include direct-insert capacitors and chip capacitors. Chip capacitors have the advantages of high assembly density, small size of electronic products, and light weight. However, chip capacitors are less sturdy than direct-insert capacitors. At the same time, they have higher requirements on production equipment and device quality. In some power devices, such as MOSFET, electrolytic capacitors are better than chips because power devices generate more heat and the heat dissipation of plug-ins is better than that of chips.

[0004] In traditional direct-insert aluminum electrolytic capacitors, the capacitors are mainly supported and fixed by the inserted pins. The force caused by external vibration is mainly borne by the pins. The existing capacitor structure lacks a structure that can provide auxiliary support for the pins. At the same time, capacitors will be damaged if they are used for too long or improperly. Aluminum electrolytic capacitors will bulge, explode, and overflow electrolyte when damaged. Improper handling will have adverse effects on other surrounding components. Summary of the invention

[0005] In view of the problems raised in the above background technology, the purpose of the present invention is to provide a protective structure, a shell and an aluminum electrolytic capacitor. The shell with a protective structure can provide auxiliary support for the aluminum electrolytic capacitor during installation and can prevent the internal electrolyte from overflowing when it is damaged.

[0006] In order to achieve the above-mentioned purpose, in the technical solution of the present invention, on the one hand, a protective structure is provided, which includes a protective shell and a plurality of protective feet. The protective shell is used to prevent the electrolyte inside the aluminum electrolytic capacitor from overflowing when the aluminum electrolytic capacitor is damaged. The protective feet are arranged at the lower part of the protective shell and are used to provide auxiliary support for the aluminum electrolytic capacitor when the aluminum electrolytic capacitor is installed. The protective shell includes an annular wall and a sealing cover. The annular wall is a hollow cylindrical structure. A cavity is provided inside the structure of the annular wall. An opening is also provided on the lower end surface of the structure of the annular wall to communicate with the cavity. The sealing cover is fixedly connected to the upper end of the annular wall to seal the upper end of the annular wall. The protective feet include a sliding rod and an anti-static rubber pad. The sliding rod is fixedly connected to the lower end of the structure of the annular wall. The anti-static rubber pad is fixedly connected to the lower end of the sliding rod.

[0007] In the technical solution of the present invention, on the other hand, a shell is also provided, which includes the above-mentioned protective structure, and the shell also includes an outer tube shell, an aluminum shell and two connecting rings; the outer tube shell is a hollow cylindrical structure; the aluminum shell is arranged inside the outer tube shell and the upper end face of the aluminum shell is sealed and the lower end face is open; the connecting rings are respectively arranged between the outer tube shell and the aluminum shell in the vertical direction to connect the outer tube shell and the aluminum shell.

[0008] Furthermore, the protective structure is slidably installed between the outer tube shell and the aluminum shell, and the ring wall in the protective structure is tightly attached to the inner wall of the outer tube shell and the outer wall of the aluminum shell; a plurality of sliding holes are opened on the connecting ring, and the protective structure is slidably installed in the sliding holes through the sliding rods therein; heat transfer oil is provided in the gap between the sliding rods between the two connecting rings and inside the cavity to export the heat inside the shell; an explosion-proof valve is also provided on the upper end surface of the aluminum shell, and the upper part of the aluminum shell is located inside the protective shell.

[0009] In the technical solution of the present invention, an aluminum electrolytic capacitor is also provided, which includes a capacitor element and a sealing rubber, and the aluminum electrolytic capacitor also includes the above-mentioned shell; the capacitor element is located at the upper end of the interior of the aluminum shell, the sealing rubber is used to seal the capacitor element inside the aluminum shell, and a lead wire is provided at the lower end of the capacitor element.

[0010] In summary, the present invention provides a protective structure, a shell and an aluminum electrolytic capacitor, wherein the shell with the protective structure is used to provide auxiliary support for the aluminum electrolytic capacitor during installation, and at the same time, prevent the internal electrolyte from overflowing when the aluminum electrolytic capacitor is damaged; in the technical solution of the present invention, a slidable protective structure is provided between the outer tube shell and the internal aluminum shell, and the explosion-proof valve on the upper end surface of the aluminum shell is protected by the protective shell in the protective structure. When the internal electrolyte of the aluminum electrolytic capacitor overflows after being damaged, the overflowed electrolyte is in the space determined by the surface where the explosion-proof valve is located and the protective shell, that is, the diffusion of the overflowed liquid can be limited, and at the same time, the protective feet in the protective structure can slide up and down to provide auxiliary support for the installation pins of the aluminum electrolytic capacitor;

[0011] In addition, in the technical solution of the present invention, the protective structure adopts a sliding design between the outer tube shell and the internal aluminum shell. On the one hand, it is convenient to slide and change the height of the protective structure to adjust the height of the protective foot according to the actual installation of the capacitor, which has higher applicability. On the other hand, when the electrolyte overflows, if the overflowed electrolyte is large, the inner upper end of the protective shell can be lifted, driving the protective structure and the protective shell to move upward to increase the space between the protective shell and the overflow surface, so as to accommodate more overflowed electrolyte and prevent overpressure explosion.

[0012] Other features and advantages of the present invention will be set forth in the description which follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram showing a partially cutaway structure of an aluminum electrolytic capacitor according to an embodiment of the present invention;

[0014] Figure 2 is a schematic diagram illustrating the structure of an aluminum electrolytic capacitor according to an embodiment of the present invention;

[0015] Figure 3 is a schematic structural diagram illustrating a protective structure according to an embodiment of the present invention;

[0016] Figure 4 is a partially cutaway schematic diagram illustrating a protective structure according to an embodiment of the present invention;

[0017] Figure 5 is a schematic structural diagram illustrating a housing according to an embodiment of the present invention;

[0018] Figure 6 is a schematic diagram illustrating the installation of a protective structure according to an embodiment of the present invention;

[0019] Figure 7 is a partial structural cutaway schematic diagram illustrating the installation of a protective structure according to an embodiment of the present invention;

[0020] Figure 8The invention is a schematic diagram of a specific use of an aluminum electrolytic capacitor and a protective structure according to an embodiment of the present invention. Figure 1 ;

[0021] Fig. 9 The invention is a schematic diagram of a specific use of an aluminum electrolytic capacitor and a protective structure according to an embodiment of the present invention. Figure 2 . DETAILED DESCRIPTION

[0022] The embodiments of the present invention provide a protection structure, a housing and an aluminum electrolytic capacitor. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] Figure 1 , Figure 2 1 and 2 are respectively a partial cross-sectional structural schematic diagram and a structural schematic diagram of an aluminum electrolytic capacitor according to an embodiment of the present invention. Figure 1 and Figure 2 As shown, this embodiment specifically provides an aluminum electrolytic capacitor. As shown in the figure, the aluminum electrolytic capacitor includes a protective structure (A), a shell, a capacitor element (F) and a sealing rubber (G). This embodiment uses the protective structure (A) to achieve auxiliary support for the aluminum electrolytic capacitor during installation and prevent the electrolyte inside the aluminum electrolytic capacitor from overflowing when it is damaged.

[0024] Specifically, Figure 3 and Figure 4 As shown, it is a structural schematic diagram and a partially cut-away structural schematic diagram of a protective structure (A) according to this embodiment, as shown Figure 3 and Figure 4 As shown, the protective structure (A) includes a protective shell (A1), and the protective shell (A1) is used to prevent the electrolyte inside the aluminum electrolytic capacitor from overflowing when the aluminum electrolytic capacitor is damaged. The protective shell (A1) includes an annular wall (A11) and a sealing cover (A12), wherein the annular wall (A11) is a hollow cylindrical structure, and a cavity (A111) is also provided inside the structure of the annular wall (A11), and an opening (A112) is also provided on the lower end surface of the structure of the annular wall (A11) to communicate with the cavity (A111); the sealing cover (A12) is fixedly connected to the upper end of the annular wall (A11) to seal the upper end of the annular wall (A11); when the electrolyte inside the aluminum electrolytic capacitor overflows after the aluminum electrolytic capacitor is damaged, the overflowed electrolyte is in a space defined by the overflow surface, the annular wall (A11) and the sealing cover (A12) to limit the overflow of the electrolyte, and limiting the overflowed electrolyte can prevent the overflowed electrolyte from having adverse effects on other components.

[0025] For details, please continue to refer to Figure 3 and Figure 4The protective structure (A) also includes a plurality of protective feet (A2), which are arranged at the lower part of the protective shell (A1). The protective feet (A2) are used to assist in supporting the aluminum electrolytic capacitor when the aluminum electrolytic capacitor is installed. The protective feet (A2) include a slide bar (A21) and an antistatic rubber pad (A22). The slide bar (A21) is fixedly connected to the lower end of the structure of the ring wall (A11); the antistatic rubber pad (A22) is fixedly connected to the lower end of the slide bar (A21); when the aluminum electrolytic capacitor is installed, the protective feet (A2) are located on one side of the mounting pin of the aluminum electrolytic capacitor. After the capacitor is fixed by the pin, the protective feet (A2) can be extended and retracted by sliding and supported around the pin of the aluminum electrolytic capacitor by the antistatic rubber pad (A22), so as to assist the pin of the aluminum electrolytic capacitor in supporting and fixing the installed aluminum electrolytic capacitor, and can effectively alleviate the external pressure on the mounting pin of the aluminum electrolytic capacitor caused by vibration and other reasons.

[0026] Figure 5 FIG. 1 is a schematic diagram of a housing structure according to an embodiment of the present invention. In this embodiment, the housing first includes the above-mentioned protective structure (A), such as Figure 5 As shown, it also includes an outer tube shell (B), an aluminum shell (C) and two connecting rings (D), the outer tube shell (B) is a hollow cylindrical structure; the aluminum shell (C) is arranged inside the outer tube shell (B), and the upper end face of the aluminum shell (C) is sealed and the lower end face is open; the two connecting rings (D) are respectively arranged between the outer tube shell (B) and the aluminum shell (C) in the vertical direction to connect the outer tube shell (B) and the aluminum shell (C); the protective structure (A) is slidably installed between the outer tube shell (B) and the aluminum shell (C), and the ring wall (A11) in the protective structure (A) is tightly attached to the inner wall of the outer tube shell (B) and the outer wall of the aluminum shell (C); a plurality of sliding holes (D1) are opened on the connecting ring (D), Figure 6 FIG. 2 is a schematic diagram showing the installation of a protective structure according to an embodiment of the present invention. Figure 6As shown, the protective structure (A) is slidably installed in the sliding hole (D1) through the sliding rod (A21), that is, the protective structure (A) can slide up and down within a certain range through the sliding rod; wherein the upper end surface of the aluminum shell (C) is also provided with an explosion-proof valve (C1), and the upper part of the aluminum shell (C) is located inside the protective shell (A1). It should be noted that the protective structure (A) is tightly installed between the outer tube shell (B) and the inner aluminum shell (C), and at the same time, the upper protective shell (A1) of the protective structure (A) covers the upper part of the aluminum shell (C), and the upper part of the aluminum shell (C) is provided with an explosion-proof valve (C1), that is, when the aluminum electrolytic capacitor When the device is damaged, the electrolyte overflowing from the explosion-proof valve (C1) is located in the space defined by the surface of the explosion-proof valve (C1) on the upper part of the aluminum shell (C) and the protective shell (A1), that is, the overflow of the electrolyte is limited; at the same time, the plurality of protective feet (A2) at the bottom of the protective structure (A) respectively pass through the sliding holes (D1) on the two connecting rings (D) through the sliding rods (A21), and the lower ends of the protective feet (A2) and the antistatic rubber pads (A22) are located at the lower part of the outer tube shell (B) and the aluminum shell (C), that is, at the side of the aluminum electrolytic capacitor with the mounting pins, so as to provide auxiliary support for the installation of the aluminum electrolytic capacitor.

[0027] Figure 7 FIG. 2 is a schematic diagram of a partial structural cross-section of a protective structure installed according to an embodiment of the present invention. Figure 7 As shown, heat transfer oil (E) is provided in the gap of the slide bar (A21) between the two connecting rings (D) and inside the cavity (A111) for extracting the heat inside the shell, that is, for extracting the internal heat of the aluminum electrolytic capacitor. It should be noted that the heat transfer oil (E) in the gap of the slide bar (A21) between the two connecting rings (D) is inconveniently located, but the heat transfer oil (E) inside the cavity (A111) is inconveniently located when the protective structure (A) moves upward. , the heat transfer oil (E) will flow out from the opening (A112) at the lower end of the cavity (A111) and will be in the gap between the inner wall of the outer tube shell (B) and the outer wall of the aluminum shell (C). When the protective structure (A) moves downward, the heat transfer oil will flow into the cavity (A111) from the opening (A112) at the lower end of the cavity (A111), that is, it will always be located on one side of the outer wall of the aluminum shell (C) and will not move upward with the upward movement of the protective structure (A), so that the heat transfer effect on the heat inside the aluminum shell will deteriorate.

[0028] Specifically, in an aluminum electrolytic capacitor according to the present embodiment, the capacitor element (F) is located at the upper end of the interior of the aluminum shell (C), the sealing rubber (G) is used to seal the capacitor element (F) inside the aluminum shell (C), and the lower end of the capacitor element (F) is also provided with a lead wire (H), and the aluminum electrolytic capacitor is installed through the lead wire. It should be noted that the protective structure (A) of the present embodiment is slidable between the outer tube shell (B) and the internal aluminum shell (C). On the one hand, it is convenient to slide and change the height of the protective structure (A) to adjust the height of the protective foot (A2) according to the actual installation of the aluminum electrolytic capacitor, and has higher applicability. On the other hand, when the electrolyte overflows, if the overflowed electrolyte is large, it can support the inner upper end of the protective shell (A1) and drive the protective structure (A) and the protective shell (A1) to move upward to increase the space between the protective shell (A1) and the overflow surface, that is, the upper end surface of the aluminum shell (C), so as to accommodate more overflowed electrolyte.

[0029] Specific working principle: Figure 8 and Fig. 9 As shown, it is a schematic diagram of the specific use of an aluminum electrolytic capacitor and a protective structure according to an embodiment of the present invention. When the embodiment of the present invention is used, the aluminum electrolytic capacitor is used and installed through the lead wire (H), that is, the pin. After the lead wire (H) is connected, installed and fixed, the height of the protective structure (A) is changed by sliding to adjust the protective foot (A2), so that the antistatic rubber pad (A22) at the lower end of the protective foot (A2) contacts the installation surface. When used, press the upper end of the protective structure (A) to slide it down until it contacts the installation surface, and the protective foot (A2) can be realized. ) is an auxiliary support for the lead wire (H) of the aluminum electrolytic capacitor. When the aluminum electrolytic capacitor is damaged, the electrolyte inside overflows from the surface where the explosion-proof valve (C1) is located. The space defined by the surface where the explosion-proof valve (C1) is located and the protective shell (A1) limits the overflow of the electrolyte. When a large amount of electrolyte overflows, the electrolyte will press against the upper end of the inner part of the protective shell (A1) and can drive the protective structure (A) and the protective shell (A1) to move upward to increase the space between the protective shell (A1) and the overflow surface, so as to accommodate more overflowed electrolyte and prevent overpressure explosion.

[0030] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A housing, characterized in that: A protective structure is included, wherein the protective structure includes: A protective shell, used to prevent the electrolyte inside the capacitor from overflowing when the capacitor is damaged, the protective shell comprising an annular wall, the annular wall being a hollow cylindrical structure, a cavity being formed inside the structure of the annular wall, and an opening being formed on the lower end surface of the structure of the annular wall to communicate with the cavity; A sealing cover, fixedly connected to the upper end of the annular wall to seal the upper end of the annular wall; A plurality of protective feet, the protective feet are arranged at the lower part of the protective shell, and are used to provide auxiliary support for the capacitor when the capacitor is installed, and the protective feet include a slide bar fixedly connected to the lower end of the ring wall structure and an antistatic rubber pad fixedly connected to the lower end of the slide bar; The housing further comprises: An outer tube shell, wherein the outer tube shell is a hollow cylindrical structure; An aluminum shell is arranged inside the outer tube shell, and the upper end surface of the aluminum shell is sealed and the lower end surface is open. The upper end surface of the aluminum shell is also provided with an explosion-proof valve, and the upper part of the aluminum shell is located inside the protective shell. When the capacitor is damaged, the internal electrolyte overflows from the surface where the explosion-proof valve is located. The space defined by the surface where the explosion-proof valve is located and the protective shell restricts the overflowed electrolyte. The overflowed electrolyte can lift the upper end of the inner part of the protective shell, driving the protective structure and the protective shell to move upward to increase the space between the protective shell and the overflow surface. Two connecting rings, the connecting rings are respectively arranged between the outer tube shell and the aluminum shell in the vertical direction to connect the outer tube shell and the aluminum shell, and heat transfer oil is provided in the gap between the two connecting rings and the inside of the cavity, which is used to extract the heat inside the shell. When the protective structure moves upward, the heat transfer oil flows out from the opening at the lower end of the cavity and is in the gap between the inner wall of the outer tube shell and the outer wall of the aluminum shell. When the protective structure moves downward, the heat transfer oil flows into the cavity from the opening at the lower end of the cavity, that is, the heat transfer oil is always at a position on one side of the outer wall of the aluminum shell to facilitate heat dissipation; The protection structure is slidably installed between the outer tube shell and the aluminum shell, and the annular wall is closely attached to the inner wall of the outer tube shell and the outer wall of the aluminum shell.

2. A housing according to claim 1, characterized in that: The connecting ring is provided with a plurality of sliding holes, and the protective structure is slidably installed in the sliding holes through the sliding rods.

3. An aluminum electrolytic capacitor, comprising a capacitor element and a sealing rubber, characterized in that: The aluminum electrolytic capacitor further comprises the case as claimed in claim 2.

4. The aluminum electrolytic capacitor according to claim 3, characterized in that: The capacitor element is located at the upper end of the aluminum shell, the sealing rubber is used to seal the capacitor element inside the aluminum shell, and a lead wire is provided at the lower end of the capacitor element.

Images