Fully-sealed capacitor module

Abstract

The fully-sealed capacitor module comprises a housing and a cover plate, the housing and the cover plate are assembled and connected and define a capacitor cavity for accommodating a core group, the cover plate is provided with a lead-out electrode electrically connected with the core group, an opening of the housing is provided with a circle of connection step in an annular direction, and the connection step is provided with a lead-out electrode electrically connected with the core group. The cover plate is clamped on the step surface of the connecting step in a buckling manner, the surface of the connecting step is flush with the outer surface of the cover plate, and sealing structures are also arranged between the joint surfaces of the cover plate and the connecting step and between the joint surfaces of the cover plate and the extraction electrode; according to the capacitor module, the shell and the cover plate are matched through the sealing structure of the threads or the sealing ring, the sealing performance, the waterproof performance and the moisture resistance of the whole product are effectively guaranteed, and it is guaranteed that the product is completely located in a fully-sealed environment.

Description

Technical Field

[0001] The utility model relates to the field of capacitors, in particular to a fully sealed capacitor module. Background Art

[0002] As the most important energy storage element in the energy conversion process, capacitors are indispensable key components, especially capacitors for energy storage / pulse, which are widely used in industrial energy conservation and environmental protection, power systems and military industries. With the increasing requirements for miniaturization, lightweight and high energy density of equipment, corresponding requirements are also put forward for components, not only in terms of reliability and long life, but also in terms of the requirements for the use environment of capacitors. For high-power module capacitors, how to use them in special environments such as land, aerospace, underwater, underground, etc., how to ensure that the product is used in a harsh environment, moisture-proof, anti-oxidation, high altitude and other factors are also being improved simultaneously. In traditional existing technologies, at present, domestic and foreign products for special harsh environments generally use a metal shell fully sealed structure to ensure its waterproofness and moisture-proofness, and the high-altitude method is to increase the creepage distance of the lead-out electrode. Therefore, a structure that can improve the sealing and waterproofness of the product as a whole is needed. Summary of the invention

[0003] The purpose of the utility model is to solve the above-mentioned existing problems and provide a completely sealed capacitor power module that can operate in a humid environment for a long time or in water where there is a concern about water vapor entering or working in water. Its main function is to ensure the sealing, waterproofness and moisture resistance of the overall product.

[0004] A fully sealed capacitor module comprises a shell and a cover plate, wherein the shell and the cover plate are assembled and connected to define a capacitor cavity for accommodating a core group, an extraction electrode electrically connected to the core group is mounted on the cover plate, a circle of connecting steps with an annular direction is arranged at the opening of the shell, the cover plate is snap-fitted onto the step surface of the connecting step, the table surface of the connecting step is arranged flush with the outer surface of the cover plate, and a sealing structure is also arranged between the joint surface of the cover plate and the connecting step, and between the joint surface of the cover plate and the extraction electrode.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, a first threaded portion is provided on the step wall of the connecting step, the thread depth of the first threaded portion is greater than or equal to the thickness of the cover plate, and a second threaded portion is provided on the edge of the cover plate corresponding to the first threaded portion, and the cover plate is screwed into the opening of the outer shell through threaded fitting.

[0007] As a further solution, the sealing structure is sealing glue. After the shell and the cover are assembled in place, the sealing glue drips from the joint gap into the joint surface between the cover and the connecting step, and between the joint surface between the cover and the lead-out electrode.

[0008] As a further solution, the sealing structure includes a silicone sealing ring, which is tightly pressed between the bottom surface of the cover plate and the step surface, and between the bottom surface of the cover plate and the lead-out electrode.

[0009] As a further solution, the step surface is provided on the inner wall surface of the shell, the cover plate is embedded in the shell in an inwardly buckled manner, the open end surface of the shell forms a table surface, and the upper surface of the cover plate is arranged flush with the open end surface of the shell;

[0010] Alternatively, the step surface is provided on the outer wall surface of the shell, the cover plate is externally snapped into the shell, the outer surface of the shell forms a table top, and the side surface of the cover plate is flush with the outer surface of the shell.

[0011] As a further solution, the cover plate includes an upper cover and a bottom cover, and at least the upper cover is snap-fitted onto the opening of the outer shell, and a plurality of locking screws are arranged between the upper cover and the bottom cover. The ends of the upper cover and the bottom cover corresponding to the locking screws are provided with connecting through holes, and the locking screws are connected to the ends of the locking screws through the connecting through holes, so that the upper cover and / or the bottom cover are tightened and fixed to the outer shell.

[0012] As a further solution, the shell is provided with a plurality of threaded holes, which are evenly distributed on the step surface of the connecting step. The cover plate is provided with connecting piece through holes corresponding to the threaded holes. The cover plate is pressed tightly against the step surface by passing the locking screws through the connecting through holes and the threaded holes.

[0013] As a further solution, the connecting step is provided on the edge of the cover plate, the step surface of the connecting step is pressed against the open end surface of the shell, and the table surface of the connecting step is flush with the outer surface of the shell.

[0014] As a further solution, a plurality of connecting ears are extended outwardly from the outer surface of the shell and / or the cover plate, and each connecting ear is provided with at least one connecting through hole.

[0015] As a further solution, the shell is made of a metal material in one piece, or the shell is made of an insulating material in one piece; the insulating material includes ABS, PPS, PC and SMC.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. The shell and cover of this capacitor module are matched with a threaded or sealing ring sealing structure, which effectively ensures the sealing, waterproofness and moisture-proofness of the overall product, and ensures that the product is completely in a fully sealed environment.

[0018] 2. The design of the product's insulating terminal can be integrated or decomposed to ensure product diversity. When the voltage is low and the user does not need terminal sealing, the insulating terminal can be directly cancelled and the lead electrode can be directly led out from the upper cover. Sealant is dripped into the lead position to ensure the seal and fit between the lead and the cover.

[0019] 3. Ensure that the lead-out electrode is completely sealed. After the lead-out insulating terminal is assembled, inject sealant to ensure the sealing of the lead-out connection position for a second time.

[0020] 4. In summary, through multiple sealing guarantees, the product effectively ensures the waterproof and moisture-proof effect, and fully meets the use requirements for special extreme environments where the product is in contact with high temperature and high humidity, or is completely in a hot and humid environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of Example 1 of the present utility model.

[0022] Figure 2 It is an enlarged structural schematic diagram of Example 1 in the utility model.

[0023] Figure 3 This is a structural schematic diagram of Example 2 of the present utility model.

[0024] Figure 4 This is a structural schematic diagram of Example 3 of the present utility model.

[0025] Figure 5 This is a structural schematic diagram of Example 4 of the present utility model.

[0026] Figure 6 This is a structural schematic diagram of Embodiment 5 of the present utility model.

[0027] Figure 7 This is a structural schematic diagram of Example 6 of the present utility model.

[0028] Figure 8 This is a structural schematic diagram of Embodiment 7 of the present utility model.

[0029] Fig. 9 This is a structural schematic diagram of Example 8 of the present utility model.

[0030] Fig.10 The utility model is a schematic diagram of the structure in which the lead-out electrode is led out by a soft wire. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings and embodiments. Embodiment 1:

[0032] like Figure 1 and Figure 2 As shown, a fully sealed capacitor module comprises a shell 1 and a cover plate 2, wherein the shell 1 and the cover plate 2 are assembled and connected to define a capacitor cavity 101 for accommodating a core group 3, an extraction electrode 4 electrically connected to the core group 3 is installed on the cover plate 2, a circle of connecting steps 5 with an annular direction is arranged at the opening of the shell 1, the cover plate 2 is snap-fitted on the step surface 501 of the connecting step 5, the table surface 502 of the connecting step 5 is arranged flush with the outer surface of the cover plate 2, and a sealing structure is also arranged between the joint surface of the cover plate 2 and the connecting step 5 and between the joint surface of the cover plate 2 and the extraction electrode 4;

[0033] The shell 1 and the cover plate 2 in this capacitor module are matched with a threaded or sealing ring sealing structure, which effectively ensures the sealing, waterproofness and moisture resistance of the overall product and ensures that the product is completely in a fully sealed environment.

[0034] In this embodiment, the step surface 501 is opened on the inner wall surface of the outer shell 1, the cover plate 2 is embedded in the outer shell 1 in an inwardly buckled manner, the open end surface of the outer shell 1 constitutes a table surface 502, and the upper surface of the cover plate 2 is flush with the open end surface of the outer shell 1, so that the fit between the outer shell 1 and the cover plate 2 is smoother and more beautiful.

[0035] The sealing structure is a sealing glue 6. After the outer shell 1 and the cover plate 2 are assembled in place, the sealing glue 6 drips from the joint gap into the joint surface between the cover plate 2 and the connecting step 5, and between the joint surface between the cover plate 2 and the lead-out electrode 4; by dripping the sealing glue 6 between the two joint surfaces, a sealing treatment is formed between the cover plate 2 and the outer shell 1 or the lead-out electrode 4.

[0036] In this embodiment, the housing 1 is a cylindrical housing, which is made of metal material in one piece. Embodiment 2:

[0037] The difference between the second embodiment and the first embodiment is that: Figure 2 and Figure 3 As shown, a first threaded portion 51 is provided on the step wall 503 of the connecting step 5, the thread depth of the first threaded portion 51 is greater than or equal to the thickness of the cover plate 2, and a second threaded portion 23 is provided on the edge of the cover plate 2 corresponding to the first threaded portion 51, and the cover plate 2 is screwed into the opening of the housing 1 by threaded fitting.

[0038] The assembly of this model includes the following steps:

[0039] a. Assemble the bottom cover plate 2 and the outer shell 1 first, and screw the outer edge of the bottom cover plate 2 into the outer shell 1 until it is parallel to the edge of the outer shell;

[0040] b. The core group 3 and the lead-out electrode 4 are welded and assembled into the housing 1, and the bottom lead-out electrode is directly and tightly fitted onto the bottom cover plate 2;

[0041] c. Then install the top cover plate 2 and screw it into the housing 1;

[0042] d. After the assembly is completed, drip sealing glue into the threaded assembly position between the housing 1 and the cover plate 2, and the assembly position between the lead-out electrode 4 and the cover plate 2;

[0043] e. After the assembly is completed, the waterproof and moisture-proof potting material is potted at the top cover plate 2. After the sealing is completed, a nut is screwed into the sealing port of the cover plate 2 to tightly seal it with the cover plate 2. The potting material tightly fits the cover plate and the plugging piece through the threaded contact position to seal;

[0044] f. The core group 3 is directly welded to the lead-out electrode 4 in a serial-parallel manner. The core group 3 can be composed of any one or more cores connected in series. Embodiment three:

[0045] like Figure 4 As shown, the cover plate 2 is provided with an insulating terminal boss 26, the inner edge of the insulating terminal boss 26 and the nut matching position are threaded, and the outer diameter of the cover plate nut assembly position ≤ the nut outer diameter 0.1mm, the nut can be directly inserted into the cover plate 2, the nut is tightly fitted with the cover plate 2 for assembly, and the exposed part of the nut is synchronously threaded for assembly. After the module product is installed and wired as a whole, the lead-out electrode 4 connector position is installed and connected, and then directly filled with insulating materials such as square sealing resin / waterproof sealant. The encapsulation sealing material increases the sealing of the contact gap through threaded contact, and the ultra-high voltage type increases the creepage distance; the product assembly body

[0046] In addition, when the edge terminal boss 26 is increased in height, an external insulating sleeve 27 can be added. The insulating sleeve 27 is sleeved on the outer periphery of the lead-out electrode. On the other hand, the inside of the insulating sleeve 27 can be threaded to increase the sealing performance. Embodiment 4:

[0047] The fourth embodiment is different from the first embodiment in that: Figure 5 As shown, the sealing structure includes a silicone sealing ring 7, which is tightly pressed between the bottom surface of the cover plate 2 and the step surface 501, and between the bottom surface of the cover plate 2 and the lead-out electrode 4; after the cover plate 2 is tightly assembled, the silicone sealing ring 7 is tightly pressed between the bottom surface of the cover plate 2 and the step surface 501, or between the lead-out electrode 4.

[0048] The lead-out electrode 4 is a nut or a bolt, and the head of the nut or the bolt is arranged below the cover plate 2. After assembly, the silicone sealing ring 7 is pressed between the bottom surface of the cover plate 2 and the head. Embodiment five:

[0049] The difference between the fifth embodiment and the first embodiment is that: Figure 6 As shown, the step surface 501 is opened on the outer wall surface of the shell 1, the cover plate 2 is externally engaged on the shell 1, the outer surface 2b of the shell 1 constitutes a table 502, and the side surface of the cover plate 2 is flush with the outer surface of the shell 1.

[0050] In this embodiment, the edge of the cover plate 2 is provided with a cover edge 28 extending downward, and the cover edge 28 is nested outside the connecting step 5 , and the bottom surface of the cover edge 28 is pressed against the step surface 501 . Embodiment six:

[0051] Embodiment 6 is improved on the basis of embodiment 4: Figure 7 As shown, the cover plate 2 includes an upper cover 21 and a bottom cover 22, and at least the upper cover 21 is snap-fitted onto the opening of the housing 1, and a plurality of locking screws 8 are arranged between the upper cover 21 and the bottom cover 22. The ends of the upper cover 21 and the bottom cover 22 corresponding to the locking screws 8 are provided with connecting holes 24, and the locking screws 9 are connected to the ends of the locking screws 8 through the connecting holes 24, so that the upper cover 21 and / or the bottom cover 22 are tightened and fixed on the housing 1.

[0052] The silicone sealing ring 7 is provided with a through hole corresponding to the connecting through hole 24, and the locking screw 9 passes through the connecting through hole 24 and the through hole to be connected with the end of the locking screw 8, and the end of the locking screw 8 will be pressed against the silicone sealing ring 7, or a sealing ring is placed between the locking screw 8 and the upper cover 21 and the bottom cover 22. Embodiment seven:

[0053] The housing 1 in the seventh embodiment is a rectangular structure. Figure 8 As shown, the housing 1 can be made of an insulating material, and the insulating material includes ABS, PC, PPS, SMC and FR4.

[0054] The housing 1 is provided with a plurality of threaded holes 504, which are evenly distributed on the four corners of the step surface 501 of the square connecting step 5. The cover plate 2 is provided with connecting piece through holes 25 corresponding to the threaded holes 504. The captive screws 9 are passed through the connecting through holes 24 and the threaded holes 504 to press the cover plate 2 tightly against the step surface 501. The captive screws 9 are tightened to press the silicone sealing ring 7 against the step surface 501. Embodiment eight:

[0055] like Fig. 9As shown, the connecting step 5 is opened on the edge of the cover plate 2 , the step surface 501 of the connecting step 5 is pressed against the open end surface of the shell 1 , and the table surface 502 of the connecting step 5 is flush with the outer surface of the shell 1 .

[0056] In the above embodiments, the outer surface of the housing 1 and / or the cover plate 2 has a plurality of connecting ears 10 of any design extending outward (see Figure 8 As shown), each connecting ear 10 is provided with at least one connecting through hole 1001, and the connecting ear 10 can ensure the user's installation; the cover plate 2 is provided with a potting hole, and a pressure relief and explosion-proof buckle 11 is installed in the potting hole (refer to Figure 6 As shown), the installation of the pressure relief and explosion-proof buckle 11 ensures the dual protection of the internal pressure release when the product is broken down and damaged and the sealing of the product packaging position.

[0057] In addition, in the above embodiments, the lead-out electrode is a busbar that can be connected to the nut of the cover plate 2 for lead-out, or, as Fig.10 As shown, the lead-out electrode 4 is a flexible wire, which is connected to the core assembly 3 and directly passes through the cover plate 2 to be led out.

[0058] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A fully sealed capacitor module, comprising a housing (1) and a cover plate (2), wherein the housing (1) and the cover plate (2) are assembled and connected to define a capacitor cavity (101) for accommodating a core group (3), and an extraction electrode (4) electrically connected to the core group (3) is mounted on the cover plate (2), characterized in that The opening of the housing (1) is provided with a connecting step (5) in an annular direction, the cover plate (2) is snap-fitted onto the step surface (501) of the connecting step (5), the table surface (502) of the connecting step (5) is flush with the outer surface of the cover plate (2), and a sealing structure is also provided between the joint surfaces of the cover plate (2) and the connecting step (5) and between the joint surfaces of the cover plate (2) and the lead-out electrode (4); a first threaded portion (51) is provided on the step wall (503) of the connecting step (5), the thread depth of the first threaded portion (51) is greater than or equal to the thickness of the cover plate (2), and a second threaded portion (23) is provided on the edge of the cover plate (2) corresponding to the first threaded portion (51), and the cover plate (2) is screwed into the opening of the housing (1) by threaded engagement.

2. A fully sealed capacitor module according to claim 1, characterized in that The sealing structure is a sealing glue (6). After the housing (1) and the cover plate (2) are assembled in place, the sealing glue (6) drips from the joint gap into the joint surface between the cover plate (2) and the connecting step (5), and between the joint surface between the cover plate (2) and the lead-out electrode (4).

3. A fully sealed capacitor module according to claim 1, characterized in that The sealing structure comprises a silicone sealing ring (7), wherein the silicone sealing ring (7) is tightly pressed between the bottom surface of the cover plate (2) and the step surface (501), and the silicone sealing ring (7) is tightly pressed between the bottom surface of the cover plate (2) and the lead-out electrode (4).

4. A fully sealed capacitor module according to claim 1, characterized in that : the step surface (501) is provided on the inner wall surface of the outer shell (1); the cover plate (2) is embedded in the outer shell (1) in an inwardly buckled manner; the open end surface of the outer shell (1) forms a table surface (502); and the upper surface (2a) of the cover plate (2) is arranged flush with the open end surface of the outer shell (1); Alternatively, the step surface (501) is provided on the outer wall surface of the outer shell (1), the cover plate (2) is externally snap-fitted onto the outer shell (1), the outer surface (2b) of the outer shell (1) forms the table surface (502), and the side surface of the cover plate (2) is arranged flush with the outer surface of the outer shell (1).

5. A fully sealed capacitor module according to claim 1, characterized in that The cover plate (2) comprises an upper cover (21) and a bottom cover (22), and at least the upper cover (21) is snap-fitted onto the opening of the housing (1), and a plurality of locking screws (8) are arranged between the upper cover (21) and the bottom cover (22). The ends of the upper cover (21) and the bottom cover (22) corresponding to the locking screws (8) are provided with connecting holes (24), and the locking screws (9) are passed through the connecting holes (24) and connected to the ends of the locking screws (8), so that the upper cover (21) and / or the bottom cover (22) are tightened and fixed to the housing (1).

6. A fully sealed capacitor module according to claim 1, characterized in that The housing (1) is provided with a plurality of threaded holes (504), which are evenly distributed on the step surface (501) of the connecting step (5); the cover plate (2) is provided with connecting member through holes (25) corresponding to the threaded holes (504); and the cover plate (2) is pressed tightly against the step surface (501) by passing the locking screws (9) through the connecting through holes (24) and the threaded holes (504).

7. A fully sealed capacitor module according to claim 1, characterized in that The connecting step (5) is provided on the edge of the cover plate (2), the step surface (501) of the connecting step (5) is pressed against the open end surface of the outer shell (1), and the table surface (502) of the connecting step (5) is arranged flush with the outer surface of the outer shell (1).

8. The fully sealed capacitor module according to claim 1, characterized in that A plurality of connection ears (10) are extended outwardly from the outer surface of the housing (1) and / or the cover plate (2), and each connection ear (10) is provided with at least one connection through hole (1001).

9. The fully sealed capacitor module according to claim 1, characterized in that: The housing (1) is made of a metal material in one piece, or the housing (1) is made of an insulating material in one piece.

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