A potting plug, a capacitor assembly, a filter assembly and a potting method

Abstract

The present application belongs to the technical field of electronic device potting, and particularly relates to a potting plugging piece, a capacitor assembly, a filter assembly and a potting method. The potting plugging piece comprises a connecting body, which is used for being inserted into a shell opening to be sealed, and the cross-sectional shape of the connecting body is the same as that of the shell opening; a flexible convex rib is arranged on the side wall surface of the connecting body corresponding to the sealed edge of the shell opening, and the flexible convex rib is arranged along the side length direction of the sealed edge; and the protruding height of the flexible convex rib is greater than the gap between the side wall surface of the connecting body and the inner wall of the shell opening. The capacitor assembly and the filter assembly are both sealed by using the potting plugging piece. The potting plugging piece provided by the present application does not need to be glued and welded, and can be pressed into the shell once to realize sealing, thereby simplifying the material and production equipment investment and improving the process convenience and production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of electronic device potting technology, specifically relating to a potting plug, capacitor assembly, filter assembly, and potting method. Background Technology

[0002] Some electronic components in new energy power electronic controller products, such as capacitors and filters, generate heat during operation. Effective heat dissipation is crucial for stable product performance. Typically, the electronic components to be cooled are housed in a casing and filled with potting compound, which then conducts heat. When filling the casing with potting compound, it is necessary to seal the compound to prevent it from flowing out through other pores in the casing if it enters through the potting opening.

[0003] Existing technologies for sealing with potting compounds mainly include adhesive bonding and welding. Both existing sealing methods require additional steps before potting, resulting in low production efficiency. For adhesive bonding, adhesive needs to be applied to the edges of the sealing baffle to bond it to the inner wall of the housing opening, and curing is required after bonding. For welding, it is often necessary to weld each edge of the sealing baffle sequentially to the inner wall of the housing opening, which is inefficient and unsuitable for applications with electrical properties requiring the prevention of short circuits. Summary of the Invention

[0004] This application provides a potting and sealing component to solve related technical problems.

[0005] This invention is achieved through the following technical solution:

[0006] A potting and sealing component, comprising:

[0007] A connector for insertion into the opening of the housing to be sealed, wherein the cross-sectional shape of the connector is the same as the cross-sectional shape of the opening of the housing;

[0008] The side wall of the connector is provided with a flexible rib corresponding to the edge to be sealed of the shell opening, and the flexible rib is arranged along the side length direction of the edge to be sealed.

[0009] The protrusion height of the flexible rib is greater than the gap between the side wall of the connector and the inner wall of the shell opening.

[0010] The potting and sealing component of this invention requires neither adhesive bonding nor welding. Instead, it utilizes a flexible rib to form a tight fit with the shell opening. Since the protrusion height of the flexible rib is greater than the gap between the side wall of the connector and the inner wall of the shell opening, after the connector is inserted into the shell opening, the flexible rib is compressed and pressed into the gap between the connector and the shell through deformation. Simultaneously, because the flexible rib is positioned along the side length of the edge to be sealed, the entire edge can be sealed. After the potting and sealing component of this invention is pressed into the shell opening, a sealing structure is naturally formed, greatly simplifying the sealing operation and improving production efficiency.

[0011] Furthermore, it also includes a baffle for covering the opening of the housing; one end of the connector is connected to the baffle.

[0012] Adding a baffle not only improves the aesthetics but also further enhances the sealing performance.

[0013] Furthermore, the connector is provided with an axial through hole. The axial through hole facilitates the installation of devices that need to extend beyond the housing.

[0014] Furthermore, it also includes a baffle for covering the opening of the housing; one end of the connector is connected to the baffle; the axial through hole penetrates the baffle.

[0015] Furthermore, the side of the flexible rib facing the insertion direction of the housing opening is an inclined surface, and the inclined surface is inclined in a direction away from the housing opening.

[0016] The inclined surface on the flexible rib can cause it to tilt and deform when the connector is inserted into the opening of the housing, thus preventing the flexible rib from breaking and ensuring the reliability of the seal.

[0017] Furthermore, the connector has at least three flexible ribs corresponding to each edge to be sealed.

[0018] The gaps between the flexible ribs can form barrier cavities with the inner wall of the shell opening. These barrier cavities can reduce the liquid flow rate. Several barrier cavities form a labyrinthine sealing path, which can gradually reduce the liquid flow rate to zero and improve the sealing effect.

[0019] Furthermore, the flexible ribs corresponding to the same edge to be sealed are parallel to each other. This facilitates the formation of a uniformly distributed labyrinthine sealing path.

[0020] The present invention also provides a potting method, wherein before potting, the above-mentioned potting and sealing component is used to seal the opening of the shell to be sealed; after potting, under the curing effect of the potting adhesive, the potting and sealing component is bonded to the shell as a whole.

[0021] The potting and sealing component of the present invention does not require adhesive or welding to fix the potting and sealing component before potting. It is fixed by the flexible protrusions on the potting and sealing component forming a tight fit with the shell. After potting, no additional fixing means are required. The potting and sealing component is bonded to the shell as a whole by the curing effect of the potting adhesive.

[0022] Furthermore, the step of sealing the shell opening includes: inserting the connector into the shell opening, wherein the flexible rib undergoes elastic deformation under the compression of the shell and fits tightly against the inner wall of the shell opening.

[0023] Furthermore, at least three flexible ribs are provided for each edge to be sealed; after the sealing is completed, an isolation cavity is formed between adjacent flexible ribs and the inner wall of the shell, and several isolation cavities form a labyrinthine sealing path.

[0024] The present invention also provides a capacitor assembly, including a housing and an electronic component, wherein the mounting port of the electronic component on the housing is sealed by the aforementioned potting and sealing component.

[0025] The present invention also provides a filter assembly, including a housing and an electronic component. The copper busbar through-holes on the housing are sealed using the aforementioned potting and sealing components. The copper busbar on the electronic component is injection molded integrally with the connector insert, and the copper busbar extends out of the housing through an axial through-hole on the connector.

[0026] Compared with existing technologies, the potting and sealing component provided by this invention does not require adhesive bonding or welding. It can achieve sealing by pressing it into the shell in one go, which simplifies the input of materials and production equipment and improves process convenience and production efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the potting process in existing technology;

[0029] Figure 2 These are schematic diagrams of the potting and sealing components used in Examples 1 to 3.

[0030] Figure 3 This is a schematic diagram of a flexible raised rib of a certain shape;

[0031] Figure 4 This is a schematic diagram of another shape of flexible raised rib;

[0032] Figure 5 This is a schematic diagram illustrating the principle of flexible ribs forming a labyrinthine sealing path.

[0033] Figure 6 This is a breakdown diagram of the capacitor assembly in Example 3;

[0034] Figure 7 This is a schematic diagram of the potting and sealing component in Example 4;

[0035] Figure 8 This is a breakdown diagram of the filter component in Example 4. Detailed Implementation

[0036] Existing sealing methods typically involve connecting the sealing baffle to the housing using adhesive or welding to form a sealed cavity, preventing the potting compound from leaking. For solutions involving adhesive application, such as... Figure 1 As shown in (a), in practice, adhesive 1A is applied to the edge of the sealing baffle. Due to the "drooping" characteristics of the adhesive, it is difficult to control the amount and trajectory of the adhesive. For some design features, there are also problems with the adhesive scratching the surrounding area and affecting cleanliness. Even after the adhesive is applied, the product still needs to undergo a certain curing time, which affects the production cycle. For welding solutions, such as... Figure 1 As shown in (b), multiple welding processes are required between the cover and the shell to seal the seal through welds 1a, 1b, 1c, and 1d, which is inefficient. Furthermore, the welding solution is not suitable for applications with electrical properties that require avoiding short circuits.

[0037] To simplify the process flow, improve efficiency and versatility, this invention provides a potting and sealing component. The flexible ribs on the potting and sealing component form a sealing fit with the shell, eliminating the need for adhesives and welding. Sealing can be achieved by pressing it into the shell in one go, thus reducing the input of materials and production equipment.

[0038] Example 1

[0039] This embodiment describes the specific structure of the potting and sealing component.

[0040] refer to Figure 2 As shown, a potting and sealing component includes:

[0041] Connector 1 is used to be inserted into the opening of the housing to be sealed, and the cross-sectional shape of connector 1 is the same as the cross-sectional shape of the opening of the housing;

[0042] The side wall of the connector 1 is provided with a flexible rib 101 corresponding to the edge to be sealed of the shell opening, and the flexible rib 101 is arranged along the side length direction of the edge to be sealed.

[0043] The protrusion height of the flexible rib 101 is greater than the gap between the side wall of the connector 1 and the inner wall of the shell opening.

[0044] The potting and sealing component of this embodiment requires neither adhesive bonding nor welding. Instead, it utilizes a flexible rib 101 to form a tight fit with the shell opening. Since the protrusion height of the flexible rib 101 is greater than the gap between the side wall of the connector 1 and the inner wall of the shell opening, after the connector 1 is inserted into the shell opening, the flexible rib 101 is compressed and deformed, pressing it firmly into the gap between the connector 1 and the shell. Simultaneously, because the flexible rib 101 is positioned along the side length of the edge to be sealed, the entire edge to be sealed can be sealed. After the potting and sealing component of this embodiment is pressed into the shell opening, a sealing structure is naturally formed, greatly simplifying the sealing operation and improving production efficiency.

[0045] In this embodiment, the flexible rib 101 can be of any shape, for example... Figure 3 As shown, the flexible rib 101 has inclined surfaces on both sides, but the stiffness of the flexible rib 101 must be less than the stiffness of the shell material. For example, the shell is made of metal and the flexible rib 101 is made of polypropylene; the shell can also be made of plastic, but the flexible rib 101 should be made of a material with lower stiffness than the shell.

[0046] Example 2

[0047] Based on Example 1, this example describes the preferred structure of the flexible rib 101.

[0048] refer to Figure 4 As shown, in this embodiment, the side of the flexible rib 101 facing the insertion direction of the housing opening is an inclined surface, and the inclined surface is inclined in a direction away from the housing opening.

[0049] The inclined surface provided on the flexible rib 101 can undergo directional bending deformation when the connector 1 is inserted into the opening of the housing, so as to prevent the flexible rib 101 from being broken and ensure the reliability of the seal.

[0050] In this embodiment, at least three flexible ribs 101 are provided for each edge to be sealed.

[0051] refer to Figure 5 As shown, the spacing between the flexible ribs 101 can form a barrier cavity 102 with the inner wall 3 of the shell opening. The barrier cavity 102 can reduce the flow rate of the potting compound 6. Several barrier cavities 102 can form a labyrinthine sealing path, gradually reducing the flow rate of the potting compound 6 to zero and improving the sealing effect.

[0052] In this embodiment, the flexible ribs 101 corresponding to the same edge to be sealed are parallel to each other. This facilitates the formation of a uniformly distributed labyrinthine sealing path.

[0053] Example 3

[0054] refer to Figure 6 As shown, this embodiment provides a capacitor assembly, including a housing 301 and an electronic component 401. The electronic component mounting port on the housing 301 is sealed using a potting and sealing component as described in Embodiment 1 or 2.

[0055] In this embodiment, the potting and sealing component further includes a baffle 2 for covering the housing opening (electronic component mounting port); one end of the connector 1 is connected to the baffle 2. Adding the baffle 2 improves both aesthetics and sealing performance.

[0056] The housing has a water-cooling area 3011 in the center for installing a water-cooling device. Both ends of the housing have electronic component mounting ports, so two potting sealants are required for sealing. The electronic component is axially inserted into the housing through the electronic component mounting port at one end. Since the copper busbar at one end of the electronic component has a bend, a protruding structure 201 is provided on the baffle 2 of the potting sealant on the right end to accommodate the bend. An axial through hole is provided on the connecting body 1 so that the bend can smoothly extend into the protruding structure 201 at the upper end of the baffle 2.

[0057] The baffle 2 of the sealing component at the left end can be a flat plate structure. Since the electronic component mounting port at the left end has a locally raised stepped structure, the connecting body 1 and the baffle 2 of the sealing component at the left end are also provided with locally raised stepped structures. Since the water level of the potting compound is lower than the stepped structure of the electronic component mounting port, the step structure of the connecting body 1 does not have flexible ribs 101 distributed on it.

[0058] Example 4

[0059] refer to Figure 7 As shown, in this embodiment, the potting and sealing component includes a baffle 2 for covering the opening (copper busbar through hole) of the housing; the connector 1 is provided with an axial through hole, and one end of the connector 1 is connected to the baffle 2; the axial through hole penetrates the baffle 2, and the axial through hole facilitates the copper busbar to extend out of the housing.

[0060] refer to Figure 8 As shown, based on the potting and sealing component of this embodiment, this embodiment provides a filter component, including a housing 302 and an electronic component 402. The copper busbar through-hole 3021 on the housing 302 is sealed by the potting and sealing component. The copper busbar on the electronic component is injection molded integrally with the insert of the connector 1 (the copper busbar and the potting and sealing component are sealed), and the copper busbar extends out of the housing through the axial through hole on the connector 1.

[0061] In this embodiment, the copper busbar input terminal 501 and copper busbar output terminal 502 of the electronic component are located at opposite ends of the housing. The copper busbar output terminal 502 needs to extend from the copper busbar through-hole 3021 at the bottom of the housing. The potting sealant and the copper busbar insert are pre-molded into one piece. The potting sealant is inserted into the copper busbar through-hole along the direction perpendicular to the housing. The flexible rib 101 on the potting sealant can form a sealed connection with the copper busbar through-hole. The baffle 2 covers the copper busbar through-hole from the inside of the housing.

[0062] Example 5

[0063] This embodiment also provides a potting method. Before potting, the potting and sealing component described in any of Embodiments 1 to 4 is used to seal the opening of the shell to be sealed. After potting, the potting and sealing component is bonded to the shell as a whole under the curing effect of the potting adhesive.

[0064] The potting and sealing component of this embodiment does not require adhesive or welding to fix it before potting. It is fixed by the flexible protrusions 101 on the potting and sealing component forming a tight fit with the shell. After potting, no additional fixing means are required. The potting and sealing component is bonded to the shell as a whole by the curing effect of the potting adhesive.

[0065] In this embodiment, the step of sealing the shell opening includes: inserting the connector 1 into the shell opening, and the flexible rib 101 undergoing elastic deformation under the squeezing action of the shell to fit tightly against the inner wall of the shell opening.

[0066] In this embodiment, at least three flexible ribs 101 are provided on the connector 1 for each edge to be sealed; after the sealing is completed, an isolation cavity is formed between adjacent flexible ribs 101 and the inner wall of the shell, and several isolation cavities form a labyrinth sealing path.

[0067] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A potting and sealing component, characterized in that, include: A connector for insertion into the opening of the housing to be sealed, wherein the cross-sectional shape of the connector is the same as the cross-sectional shape of the opening of the housing; The side wall of the connector is provided with a flexible rib corresponding to the edge to be sealed of the shell opening, and the flexible rib is arranged along the side length direction of the edge to be sealed. The protrusion height of the flexible rib is greater than the gap between the side wall of the connector and the inner wall of the shell opening.

2. The potting and sealing component according to claim 1, characterized in that, It also includes a baffle for covering the opening of the housing; one end of the connector is connected to the baffle.

3. The potting and sealing component according to claim 1, characterized in that, The connector is provided with an axial through hole.

4. The potting and sealing component according to claim 3, characterized in that, It also includes a baffle for covering the opening of the housing; one end of the connector is connected to the baffle; the axial through hole penetrates the baffle.

5. The potting and sealing component according to any one of claims 1 to 4, characterized in that, The side of the flexible rib facing the insertion direction of the shell opening is an inclined surface, and the inclined surface is inclined away from the shell opening.

6. The potting and sealing component according to claim 5, characterized in that, The connector has at least three flexible ribs corresponding to each edge to be sealed.

7. The potting and sealing component according to claim 6, characterized in that, The flexible ribs corresponding to the same edge to be sealed are parallel to each other.

8. A potting method, characterized in that, Before potting, the potting and sealing component described in any one of claims 1 to 5 is used to seal the opening on the housing to be sealed; after potting, the potting and sealing component is bonded to the housing as a whole under the curing action of the potting adhesive.

9. The potting method according to claim 8, characterized in that, The steps for sealing the shell opening include: inserting the connector into the shell opening, and the flexible rib undergoing elastic deformation under the squeezing action of the shell to fit tightly against the inner wall of the shell opening.

10. The potting method according to claim 8, characterized in that, At least three flexible ribs are provided for each edge to be sealed; after the sealing is completed, a barrier cavity is formed between two adjacent flexible ribs and the inner wall of the shell, and several barrier cavities form a labyrinthine sealing path.

11. A capacitor assembly, characterized in that, It includes a housing and electronic components, wherein the electronic component mounting ports on the housing are sealed using a potting sealant as described in claim 1 or 2.

12. A filtering component, characterized in that, The device includes a housing and electronic components. The copper busbar vias on the housing are sealed using a potting sealant as described in claim 3 or 4. The copper busbars on the electronic components are injection molded integrally with the connector insert, and the copper busbars extend out of the housing through axial through holes on the connector.

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