Sealing structure and capacitor thereof

Abstract

The utility model discloses a sealing structure and a capacitor comprising the same, the sealing structure comprises a housing, an encapsulation part and a capacitor core, the housing is internally provided with a cavity used for accommodating the encapsulation part and the capacitor core; the encapsulation part wraps the capacitor core, a plurality of raised lines are uniformly distributed on the side surface of the encapsulation part, and grooves are formed among the raised lines; a positioning block matched with the groove is arranged on the inner wall of the cavity; and the shell is inserted into the groove through the positioning block and is fixedly connected with the encapsulation part. The capacitor core can be stably fixed in the cavity by arranging the shell and the filling and sealing part, the sealing performance reduction caused by deformation of the shell and the filling and sealing part in the use process is avoided by arranging the positioning block and the groove, the operation stability of the sealing structure is improved, and the service life of the sealing structure is prolonged; through the arrangement of the raised lines and the positioning blocks, the encapsulation part can accurately and stably fix the capacitor core in the shell, and the structural stability of the capacitor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to capacitor technical field especially a kind of sealing structure and capacitor thereof. BACKGROUND

[0002] At present, the capacitor used on new energy automobile inverter is mostly resin pouring capacitor core process, to improve the sealing of capacitor core. The purpose is to avoid the influence of product in long-term use, core moisture on the deterioration of capacitor electrical characteristics. Especially in the environment of high-low temperature cross change, the capacitor shell and the pouring material can not keep sealed state because of deformation, leading to the water vapor outside capacitor into capacitor, causing corrosion to capacitor core, affecting the running stability and service life of capacitor. SUMMARY

[0003] To solve the above problems, the purpose of the utility model is to provide a kind of sealing structure and capacitor thereof, ensure the sealing of capacitor in use process, improve the running stability and service life of capacitor.

[0004] The technical scheme adopted by the utility model to solve its problem is:

[0005] The first aspect of the application, a sealing structure, comprising: shell, pouring part and capacitor core, the shell is equipped with the cavity for accommodating the pouring part and the capacitor core;The pouring part wraps the capacitor core, the side of the pouring part is uniformly distributed with a plurality of convex strips, and the convex strips are provided with grooves;The inner wall of the cavity is provided with a positioning block matched with the groove, and the shell is fixedly connected with the pouring part by inserting the positioning block into the groove.

[0006] The above sealing structure has at least the following beneficial effects: by setting shell and pouring part, capacitor core can be stably fixed in cavity, by setting positioning block and groove, avoid deformation of shell and pouring part in use process and reduce sealing, improve the running stability and service life of sealing structure;By setting convex strip and positioning block, the pouring part can accurately and stably fix the capacitor core in the shell, improve the structural stability of capacitor.

[0007] Further, the upper and lower sides of the positioning block are provided with clamping grooves, and the convex strip is inserted into the clamping groove to seal the cavity. By setting clamping groove, the connection stability of convex strip and shell is guaranteed, the positioning block is prevented from falling off from the groove, and the integrity of sealing structure is affected.

[0008] Further, the height of the convex strip is equal to the height of the clamping groove. This structure ensures that the upper and lower ends of the convex strip can fit the two sides of the clamping groove, and ensures the sealing property of the sealing structure.

[0009] Further, the length of the convex strip is equal to the depth of the clamping groove. This structure ensures that the outer side of the convex strip can fit the bottom of the clamping groove, avoiding the gap between the positioning block and the groove, affecting the sealing performance of the sealing structure.

[0010] Further, the convex strip fills the clamping groove to seal the cavity in a high-temperature environment. This structure ensures that the convex strip can fit the clamping groove in a high-temperature environment, avoiding the water vapor above the shell from entering the lower part of the convex strip, improving the operation stability and service life of the sealing structure.

[0011] Further, the convex strip shrinks to fit the positioning block to seal the cavity in a low-temperature environment. This structure ensures that the upper and lower convex strips can clamp the positioning block in a low-temperature environment, avoiding the water vapor above the shell from entering the lower part of the convex strip, improving the operation stability and service life of the capacitor.

[0012] Further, the distance between adjacent convex strips is equal to the height of the positioning block. This structure ensures that adjacent convex strips can stably clamp the positioning block, avoiding the gap between the groove and the positioning block, affecting the structural stability of the sealing structure.

[0013] Further, the potting part and the convex strip are integrally formed. This structure ensures that the convex strip can be stably fixed to the side of the potting part, improving the integrity of the potting part.

[0014] Further, the potting part is made of epoxy resin. Epoxy resin has strong heat resistance, arc resistance and mechanical properties, and the potting part is made of epoxy resin, effectively improving the stability and insulation of the sealing structure.

[0015] In the second aspect of the present application, a capacitor includes the sealing structure as described above.

[0016] The capacitor has the following advantages: by arranging the shell and the potting part, the capacitor core can be stably fixed in the cavity; by arranging the positioning block and the groove, the deformation of the shell and the potting part during use is avoided, improving the operation stability and service life of the sealing structure; by arranging the convex strip and the positioning block, the potting part can accurately and stably fix the capacitor core in the shell, improving the structural stability of the capacitor; by arranging the clamping groove, the connection stability of the convex strip and the shell is ensured, avoiding the positioning block from falling out of the groove, affecting the integrity of the sealing structure; the convex strip fills the clamping groove to seal the cavity in a high-temperature environment, ensuring that the convex strip can fit the clamping groove in a high-temperature environment, avoiding the water vapor above the shell from entering the lower part of the convex strip, improving the operation stability and service life of the sealing structure; the convex strip shrinks to fit the positioning block to seal the cavity in a low-temperature environment, ensuring that the upper and lower convex strips can clamp the positioning block in a low-temperature environment, avoiding the water vapor above the shell from entering the lower part of the convex strip, improving the operation stability and service life of the capacitor.

[0017] The additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A structure diagram of a sealing structure according to an embodiment of the present application;

[0019] Figure 2 An exploded view of a sealing structure according to an embodiment of the present application;

[0020] Figure 3 A sectional view of a sealing structure according to an embodiment of the present application;

[0021] Figure 4 A structure diagram of a sealing structure according to an embodiment of the present application; Figure 3 A structure diagram of a sealing structure according to an embodiment of the present application;

[0022] Figure 5 A structure diagram of a sealing structure according to an embodiment of the present application; Figure 3 A structure diagram of a sealing structure according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] Embodiments of the present application are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0024] With reference to Figures 1 to 5 , the present application provides a sealing structure, comprising: a shell 100, a pouring sealing part 200 and a capacitor core 300, the shell 100 is provided with a cavity 110 for accommodating the pouring sealing part 200 and the capacitor core 300; the pouring sealing part 200 wraps the capacitor core 300, the side surface of the pouring sealing part 200 is uniformly distributed with a plurality of convex strips 210, and a groove 220 is arranged between the convex strips 210; the inner wall of the cavity 110 is provided with a positioning block 120 matched with the groove 220, and the shell 100 is fixedly connected with the pouring sealing part 200 by inserting the positioning block 120 into the groove 220.

[0025] By arranging the shell 100 and the pouring sealing part 200, the capacitor core 300 can be stably fixed in the cavity 110, by arranging the positioning block 120 and the groove 220, the deformation of the shell 100 and the pouring sealing part 200 during use is avoided, the sealing performance is improved, and the operation stability and service life of the sealing structure are improved; by arranging the convex strip 210 and the positioning block 120, the pouring sealing part 200 can accurately and stably fix the capacitor core 300 in the shell 100, and the structural stability of the capacitor is improved.

[0026] Another embodiment, the upper and lower of the positioning block 120 is provided with a card slot 130, the convex strip 210 is inserted into the card slot 130 to seal the cavity 110. By setting the card slot 130, the connection stability of the convex strip 210 and the shell 100 is ensured, and the positioning block 120 is prevented from falling off from the groove 220, thereby affecting the integrity of the sealing structure.

[0027] Another embodiment, the height of the convex strip 210 is equal to the height of the card slot 130. This structure ensures that the upper and lower ends of the convex strip 210 can fit the two sides of the card slot 130, thereby ensuring the sealing property of the sealing structure.

[0028] Another embodiment, the length of the convex strip 210 is equal to the depth of the card slot 130. This structure ensures that the outer side of the convex strip 210 can fit the bottom of the card slot 130, thereby avoiding the gap between the positioning block 120 and the groove 220, and affecting the sealing property of the sealing structure.

[0029] Referring to Figure 4 , another embodiment, the convex strip 210 fills the card slot 130 to seal the cavity 110 in a high-temperature environment. This structure ensures that the convex strip 210 can fit the card slot 130 in a high-temperature environment, thereby preventing the water vapor above the shell 100 from entering the lower side of the convex strip 210, and improving the operation stability and service life of the sealing structure.

[0030] Referring to Figure 5 , another embodiment, the convex strip 210 shrinks to fit the positioning block 120 to seal the cavity 110 in a low-temperature environment. This structure ensures that the two convex strips 210 above and below can clamp the positioning block 120 in a low-temperature environment, thereby preventing the water vapor above the shell 100 from entering the lower side of the convex strip 210, and improving the operation stability and service life of the capacitor.

[0031] Another embodiment, the distance between adjacent convex strips 210 is equal to the height of the positioning block 120. This structure ensures that the adjacent convex strips 210 can stably clamp the positioning block 120, thereby avoiding the gap between the groove 220 and the positioning block 120, and affecting the structural stability of the sealing structure.

[0032] Another embodiment, the potting portion 200 is integrally formed with the convex strip 210. This structure ensures that the convex strip 210 can be stably fixed to the side of the potting portion 200, thereby improving the integrity of the potting portion 200.

[0033] Another embodiment, the potting portion 200 is made of epoxy resin. The epoxy resin has strong heat resistance, arc resistance and mechanical properties, and the potting portion 200 is made of epoxy resin, thereby effectively improving the stability and insulation of the sealing structure.

[0034] In some embodiments, the positioning block 120 can adopt a square, a semicircle, a R-angle shape, etc., and the groove 220 can form a structure matched with the positioning block 120 in the production process of the component, so as to effectively ensure the connection stability and the sealing property between the shell 100 and the potting part 200.

[0035] The application also provides a capacitor comprising the sealing structure as described above.

[0036] The working principle of the application will be further described below.

[0037] In the production process of the capacitor in the embodiment, first, the shell 100 with a corresponding size is selected according to the specification of the capacitor core 300, wherein the shell 100 is internally provided with the cavity 110 and the positioning block 120, and the positioning block 120 is provided with the clamping groove 130 on the upper and lower sides; then the capacitor core 300 is placed in the cavity 110, and the epoxy resin is poured between the shell 100 and the capacitor core 300 to form the potting part 200 and the convex strip 210 and the groove 220 matched with the positioning block 120 and the clamping groove 130, so that the shell 100 is inserted into the groove 220 through the positioning block 120 and is sealingly connected with the potting part 200.

[0038] In the use process of the capacitor, when the capacitor is in a high-temperature environment, for example, Figure 4 As shown, the potting part 200 expands due to heat, so that the convex strip 210 fills the clamping groove 130, the cavity 110 is sealed, and the water vapor outside the shell 100 cannot enter the cavity 110 through the gap between the convex strip 210 and the clamping groove 130 to corrode the capacitor core 300. When the capacitor is in a low-temperature environment, for example, Figure 5 As shown, the potting part 200 shrinks due to cold, the adjacent convex strips 210 shrink and move close to the positioning block 120, and the positioning block 120 is adhered, the cavity 110 is sealed, and the water vapor outside the shell 100 cannot enter the cavity 110 through the gap between the convex strip 210 and the clamping groove 130 to corrode the capacitor core 300. Therefore, the capacitor of the application can ensure the sealing property between the shell 100 and the potting part 200 in different temperature environments, avoid the water vapor outside the shell 100 from corroding the inside of the capacitor, and improve the operation stability and the service life of the capacitor.

[0039] From the above description, the sealing structure and the capacitor thereof can stably fix the capacitor core 300 in the cavity 110 by setting the shell 100 and the pouring portion 200, avoid deformation of the shell 100 and the pouring portion 200 in the use process to reduce the sealing performance, improve the operation stability and service life of the sealing structure, set the positioning block 120 and the groove 220, set the convex strip 210 and the positioning block 120, make the pouring portion 200 accurately and stably fix the capacitor core 300 in the shell 100, improve the structural stability of the capacitor, set the clamping groove 130, ensure the connection stability of the convex strip 210 and the shell 100, avoid the positioning block 120 from falling off from the groove 220, and affect the integrity of the sealing structure, the convex strip 210 fills the clamping groove 130 to seal the cavity 110 in a high-temperature environment, ensures that the convex strip 210 can be attached to the clamping groove 130 in a high-temperature environment, avoids water vapor above the shell 100 from entering below the convex strip 210, improves the operation stability and service life of the sealing structure, the convex strip 210 shrinks to attach to the positioning block 120 to seal the cavity 110 in a low-temperature environment, ensures that the upper and lower two convex strips 210 can clamp the positioning block 120 in a low-temperature environment, avoids water vapor above the shell 100 from entering below the convex strip 210, and improves the operation stability and service life of the capacitor.

[0040] The utility model is not limited to the above embodiment, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the utility model.

Claims

1. A seal structure, characterized by, The application relates to a sealing structure of a capacitor, which comprises a shell, a pouring part and a capacitor core, a cavity for accommodating the pouring part and the capacitor core is arranged in the shell; the pouring part wraps the capacitor core, a plurality of convex strips are uniformly distributed on the side surface of the pouring part, and grooves are arranged between the convex strips; the inner wall of the cavity is provided with positioning blocks matched with the grooves, and the shell is fixedly connected with the pouring part by being inserted into the grooves through the positioning blocks. Upper and lower sides of the positioning blocks are provided with clamping grooves, and the convex strips are inserted into the clamping grooves to seal the cavity.

2. A seal structure according to claim 1, wherein The height of the convex strips is equal to the height of the clamping grooves.

3. A seal structure according to claim 2, wherein The length of the convex strips is equal to the depth of the clamping grooves.

4. A seal structure according to claim 3, wherein The convex strips fill the clamping grooves to seal the cavity in a high-temperature environment.

5. The seal structure of claim 2, wherein The convex strips shrink to fit the positioning blocks to seal the cavity in a low-temperature environment.

6. A seal structure according to claim 5, wherein The distance between adjacent convex strips is equal to the height of the positioning blocks.

7. The sealed structure of claim 1, wherein The pouring part is integrally formed with the convex strips.

8. The sealed structure of claim 1, wherein The pouring part is made of epoxy resin.

9. A seal structure according to claim 8, wherein The application further relates to a sealing structure comprising any one of the sealing structures according to claims 1-9.

10. A capacitor characterized by ​

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