Shell and aluminum electrolytic capacitor

Abstract

A shell comprises a body and a positioning piece, the top of the body is open, the positioning piece is arranged at the bottom or the lower portion of the body, and the positioning piece comprises a positioning girdle, a positioning block or a positioning step. According to the utility model, the capacitor body is arranged in the shell, and the positioning girdling, the positioning block or the positioning step is arranged on the shell, so that the cavity for accommodating the liquid absorption material is formed between the bottom of the shell of the capacitor body and the bottom of the shell; and the connection between the shell and the shell of the capacitor body can be realized through girdling or resin adhesive, thereby being convenient and very suitable for industrial production.

Description

TECHNICAL FIELD

[0001] The utility model relates to an aluminum electrolytic capacitor, especially to a shell of an aluminum electrolytic capacitor and the aluminum electrolytic capacitor. BACKGROUND

[0002] Currently, the core package of the liquid aluminum electrolytic capacitor contains the electrolyte, when the capacitor appears short circuit and the like, the core package will heat, when the core package heats, the explosion-proof valve at the bottom of the shell can be opened to cause the electrolyte to spray out of the explosion-proof valve, once the sprayed electrolyte falls on the electrified circuit board, fire is easily caused.

[0003] Currently, in the aluminum electrolytic capacitor industry, some measures are also taken for the electrolyte leakage, such as patent 2024217758504, an aluminum electrolytic capacitor capable of preventing liquid leakage; a connecting piece is connected through threads, a cavity containing a liquid absorbing material is formed between the connecting piece and the shell, so that when the explosion-proof valve of the aluminum electrolytic capacitor is opened, the flowing electrolyte is absorbed by the liquid absorbing material, so that the phenomenon of fire on the circuit board is prevented. However, the cavity is formed by the threaded connection, the cost is increased in production due to the setting of the threads, and the threaded connection is not suitable for mass production. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem of overcoming the prior art, and provides a shell and an aluminum electrolytic capacitor capable of preventing liquid leakage and using the shell.

[0005] To solve the above technical problems, the technical scheme provided by the utility model is as follows: a shell, comprising a body and a positioning piece, the top of the body is open, the positioning piece is arranged at the bottom or lower part of the body, and the positioning piece comprises a positioning waist, a positioning block or a positioning step.

[0006] Preferably, the positioning waist is arranged at the lower part of the body, and a cavity is formed between the positioning waist and the bottom of the body.

[0007] Preferably, the positioning block is fixedly arranged at the bottom of the body, and the positioning block forms a cavity at the bottom of the body.

[0008] Preferably, the positioning block is in the form of a ring.

[0009] Preferably, the positioning block is in the form of a block, and the bottom of the body is uniformly provided with a plurality of positioning blocks close to the inner wall of the body.

[0010] Preferably, the bottom of the body of the shell is provided with a pressure relief hole or a pressure relief valve.

[0011] An aluminum electrolytic capacitor comprises a shell and a capacitor body; the capacitor body is arranged in the shell, the capacitor body comprises an outer shell, a core package and a sealing member; the core package is arranged in the outer shell through the sealing member; the bottom of the outer shell is provided with an explosion-proof valve;

[0012] The shell comprises a body and a positioning member, the top of the body is open; the positioning member is arranged at the bottom or lower part of the body, and the positioning member comprises a positioning waist or a positioning block;

[0013] The bottom of the outer shell is positioned on the positioning member, and the open end of the body is fixed with the upper part of the outer shell; a cavity is formed between the bottom of the outer shell and the bottom of the body.

[0014] The aluminum electrolytic capacitor described above, preferably, the open end of the body is fixed with the outer shell through resin glue.

[0015] The aluminum electrolytic capacitor described above, preferably, the open end of the body is bent to the waist part of the outer shell.

[0016] The aluminum electrolytic capacitor described above, preferably, the upper part of the body is provided with a first fixed waist at the position of the waist of the outer shell; the first fixed waist is positioned on the waist of the outer shell so as to fix the capacitor body in the body.

[0017] The aluminum electrolytic capacitor described above, preferably, the middle part of the body is provided with a fixing member, the fixing member is protruded to the inside of the body and is positioned on the outer wall of the outer shell; the fixing member comprises a second fixed waist, a screw-shaped waist or a vertical protrusion.

[0018] The aluminum electrolytic capacitor described above, preferably, the middle part of the outer shell is provided with an anti-vibration waist, and the second fixed waist is positioned on the outer wall of the anti-vibration waist.

[0019] The aluminum electrolytic capacitor described above, preferably, 3-6 vertical protrusions are uniformly arranged on the body.

[0020] The aluminum electrolytic capacitor described above, preferably, the bottom of the body of the shell is provided with a pressure relief hole or a pressure relief valve.

[0021] The aluminum electrolytic capacitor described above, preferably, the cavity is provided with a liquid absorbing material.

[0022] Compared with the prior art, the capacitor body is arranged in the shell, the positioning waist, the positioning block or the positioning step are arranged on the shell, so that a cavity is formed between the bottom of the shell of the capacitor body and the bottom of the shell, the cavity can be provided with a liquid absorbing material, the cavity is arranged to play a buffering and storage role of the sprayed electrolyte when the explosion-proof valve is opened, and the connection between the shell and the shell of the capacitor body can be connected through the waist or the resin glue, which is convenient and very suitable for industrial production. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structure schematic view of the shell in embodiment 1.

[0024] Figure 2 It is the structure schematic view of the aluminum electrolytic capacitor in embodiment 1.

[0025] Figure 3 It is the structure schematic view of the aluminum electrolytic capacitor containing the first fixed waist and the second fixed waist in embodiment 1.

[0026] Figure 4 It is the structure schematic view of the second fixed waist and the anti-vibration waist.

[0027] Figure 5 It is the structure schematic view of the aluminum electrolytic capacitor in embodiment 2.

[0028] Figure 6 It is the structure schematic view of the shell when the resin glue is injected in embodiment 2.

[0029] Figure 7 It is the structure schematic view of the shell in embodiment 3.

[0030] Figure 8 It is the structure schematic view of the aluminum electrolytic capacitor in embodiment 3.

[0031] Figure 9 It is the structure schematic view of the shell in embodiment 4.

[0032] Figure 10 It is the structure schematic view of the aluminum electrolytic capacitor in embodiment 4.

[0033] Figure 11 It is the structure schematic view of the aluminum electrolytic capacitor in embodiment 5.

[0034] LEGEND

[0035] 1, shell; 11, body; 12, positioning waist; 13, positioning block; 14, positioning step; 2, capacitor body; 21, shell; 22, core package; 23, sealing element; 24, explosion-proof valve; 3, liquid absorbing material; 4, first fixing waist; 5, second fixing waist; 6, glue injection gap; 7, resin glue. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present application, the following will be combined with the description, drawings and preferred embodiments to make a more comprehensive and detailed description of the present application, but the protection scope of the present application is not limited to the following specific embodiments.

[0037] It should be particularly noted that when an element is described as being "fixed to, connected to, or communicated with" another element, it can be directly fixed, connected or communicated with the other element, or indirectly fixed, connected or communicated with the other element through other intermediate connecting elements.

[0038] Unless otherwise defined, all professional terms used herein have the same meaning as generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the protection scope of the present application. Embodiment 1

[0039] A shell, as shown in Figure 1 , comprises a body 11 and a positioning element, the top of the body 11 is open, and the positioning element is arranged at the bottom or lower part of the body 11, and the positioning element is a positioning waist 12.

[0040] In this embodiment, as shown in Figure 1 , when the positioning element is a positioning waist 12, the positioning waist 12 is arranged at the lower part of the body 11; a cavity is formed between the positioning waist 12 and the bottom of the body.

[0041] This embodiment also provides an aluminum electrolytic capacitor, which has the characteristics of preventing liquid leakage. The aluminum electrolytic capacitor of this embodiment comprises a shell 1 and a capacitor body 2; the capacitor body 2 is arranged in the shell 1, and the capacitor body 2 comprises a shell 21, a core package 22 and a sealing element 23; the sealing element 23 can be a rubber plug or a cover plate; the core package 22 is arranged in the shell 21 through the sealing element 23, and the core package 22 is impregnated with electrolyte; the bottom of the shell 21 is provided with an explosion-proof valve 24.

[0042] As shown in Figure 1 and Figure 2As shown, the shell 1 includes a body 11 and a positioning member, the top of the body 11 is open, the bottom of the body 11 of the shell 1 can be provided with a pressure relief hole (not shown in the figure), the number of pressure relief holes can be one or more, and the diameter of the pressure relief hole is between 0.5-2mm. The positioning member is arranged at the bottom or lower part of the body 11, and the positioning member is a positioning waist 12.

[0043] The bottom of the shell 21 is placed on the positioning waist 12, and the open end of the body 11 is fixed with the upper part of the shell 21; the cavity formed between the bottom of the shell 21 and the bottom of the body 11 is provided with a liquid absorbing material 3. The liquid absorbing material 3 can be sponge or liquid absorbing cotton, etc. In this embodiment, the height of the cavity is preferably between 1-2cm, and the cavity can not be provided with a liquid absorbing material.

[0044] As shown in Figure 2 and Figure 3 , the upper part of the body 11 is provided with a first fixed waist 4 at the position of the waist of the shell 21; the first fixed waist 4 is placed against the waist of the shell 21 to fix the capacitor body 2 in the body 11.

[0045] The open end of the shell is inwardly rolled, so that the open end of the shell 1 is placed on the rolled edge position of the shell 21.

[0046] In this embodiment, as shown in Figure 3 , in order to ensure the stability of the connection between the shell 1 and the shell 21, a fixing member is arranged in the middle of the body, and in this embodiment, the fixing member is a second fixed waist 5, which is placed against the outer wall of the shell 21; the second fixed waist can be spiral on the shell.

[0047] In other embodiments, as shown in Figure 4 , the middle part of the shell 21 is provided with an anti-vibration waist, and the second fixed waist 5 can be placed against the outer wall of the anti-vibration waist. The arrangement of the anti-vibration waist can reduce the shaking amplitude of the core in the shell, thereby enhancing the anti-vibration performance of the aluminum electrolytic capacitor.

[0048] In other embodiments, the fixing member can also be a spiral waist or a vertical protrusion. When a vertical protrusion is used, the number of vertical protrusions can be 3-6, and the vertical protrusions are evenly arranged on the body of the shell; the vertical protrusions can be as shown in patent CN206505836U or patent CN217740352U.

[0049] In this embodiment, the capacitor body 2 is disposed inside the housing 1. The positioning waist 12 on the housing 1 creates a cavity between the bottom of the capacitor body and the bottom of the housing. Liquid-absorbing material can be disposed in the cavity. The cavity serves to buffer and store the ejected electrolyte when the explosion-proof valve 24 is opened. The connection between the housing 1 and the outer shell 21 of the capacitor body 2 can be made by the waist or resin glue 7, which is convenient and very suitable for industrial production. Example 2

[0050] In this embodiment, as Figure 5 As shown, in this embodiment, the first fixed waist 4 and the second fixed waist are not provided. Instead, the open end of the body 11 of the housing 1 is fixed to the outer shell 21 by resin glue 7.

[0051] In this embodiment, as Figure 6 As shown, due to the small gap between the outer shell 21 of the capacitor body 2 and the housing 1, and the waist at the rubber stopper position on the outer shell 21 of the capacitor body 2, an injection notch 6 is formed between the housing and the outer shell 21 of the capacitor body 2, allowing for the injection of resin glue 7. After the resin glue 7 is injected, heating will allow the resin glue 7 to cure. After the resin glue 7 is injected and fixed between the body 11 and the outer shell 21 of the housing 1, the open end of the body 11 bends towards the waist of the outer shell 21.

[0052] The other parts of this embodiment are the same as those in Embodiment 1. Example 3

[0053] In this embodiment, as Figure 7 The shell 1 shown and Figure 8 The aluminum electrolytic capacitor shown has a positioning block 13 as its positioning element. The positioning block 13 is fixedly disposed at the bottom of the body 11, and a cavity is formed in the bottom of the body 11. The positioning block 13 can be in the shape of a ring or a block. When the positioning block 13 is in the shape of a block, there are multiple positioning blocks 13, which are evenly disposed at the bottom of the body 11 near the inner wall of the body 11.

[0054] The other parts of this embodiment are the same as those in Embodiment 1 or Embodiment 2. Example 4

[0055] like Figure 9 The shell 1 shown and Figure 10 When the positioning element of the aluminum electrolytic capacitor shown is a positioning step 14, the positioning step 14 is set at the bottom of the body 11; specifically, the positioning step 14 is integrally formed with the body 11.

[0056] The other parts of this embodiment are the same as those in Embodiment 1 or Embodiment 2. Example 5

[0057] As Figure 10 shown, a pressure relief valve 15 is arranged at the bottom of the body 11 of the housing 1, so that when the explosion-proof valve of the capacitor body is opened, the pressure relief valve can timely discharge the gas from the body 11 of the housing 1. The other parts of the embodiment are the same as those of embodiment 1.

Claims

1. A housing characterized by: The body is open at the top, and the positioning member is arranged at the bottom or lower part of the body, and the positioning member comprises a positioning waist, a positioning block or a positioning step.

2. The case according to claim 1, characterized in that: The positioning waist is arranged at the lower part of the body, and a cavity is formed between the positioning waist and the bottom of the body.

3. The case according to claim 1, characterized by: The positioning block is fixedly arranged at the bottom of the body, and the positioning block forms a cavity at the bottom of the body.

4. The case according to claim 3, characterized in that: The positioning block is in the shape of a ring.

5. The case of claim 3, wherein: The positioning block is in the shape of a block, and the bottom of the body is uniformly provided with a plurality of positioning blocks close to the inner wall of the body.

6. The case of claim 1, wherein: The bottom of the body of the shell is provided with a pressure relief hole or a pressure relief valve.

7. An aluminum electrolytic capacitor characterized by: The shell comprises a shell body and a capacitor body; the capacitor body is arranged in the shell body, and the capacitor body comprises a shell, a core package and a sealing member; the core package is arranged in the shell through the sealing member; the bottom of the shell is provided with an explosion-proof valve; The shell comprises a body and a positioning member, and the body is open at the top; the positioning member is arranged at the bottom or lower part of the body, and the positioning member comprises a positioning waist or a positioning block; The bottom of the shell is supported on the positioning member, the open end of the body is fixed with the upper part of the shell, and a cavity is formed between the bottom of the shell and the bottom of the body.

8. The aluminum electrolytic capacitor according to claim 7, characterized by: The open end of the body is fixed with the shell through resin glue.

9. The aluminum electrolytic capacitor according to claim 8, characterized by: The open end of the body is bent towards the waist part of the shell.

10. The aluminum electrolytic capacitor according to claim 7, characterized by: A first fixing waist is arranged at the position of the waist of the shell on the upper part of the body; the first fixing waist supports the waist of the shell, so as to fix the capacitor body in the body.

11. The aluminum electrolytic capacitor according to claim 10, characterized by: A fixing member is arranged in the middle part of the body, and the fixing member protrudes towards the inside of the body and supports the outer wall of the shell; the fixing member comprises a second fixing waist, a threaded waist or a vertical protrusion.

12. The aluminum electrolytic capacitor according to claim 11, characterized by: A vibration-proof waist is arranged in the middle part of the shell, and the second fixing waist supports the outer wall of the vibration-proof waist.

13. The aluminum electrolytic capacitor of claim 11, wherein: The body is uniformly provided with 3-6 vertical protrusions.

14. The aluminum electrolytic capacitor of claim 7, wherein: The bottom of the body of the shell is provided with a pressure relief hole or a pressure relief valve.

15. The aluminum electrolytic capacitor of claim 6 wherein: The cavity is provided with a liquid absorbing material.

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