Insulation isolation cylinder for thin film capacitor and thin film capacitor

Abstract

The utility model provides an insulating isolation cylinder and a film capacitor with the same, the insulating isolation cylinder comprises a cylinder body, the cylinder body comprises a bottom wall part and a side wall part, the side wall part is annular and is arranged around the bottom wall part, a core bag accommodating cavity is formed between the bottom wall part and the side wall part, the side wall part is provided with a through diversion hole, and a distance is formed between the diversion hole and the bottom wall part. According to the insulation isolation cylinder and the film capacitor with the insulation isolation cylinder, the through diversion hole is formed in the side wall part of the insulation isolation cylinder, the gap is formed between the diversion hole and the bottom wall part, and the gap between the insulation isolation cylinder and the core package can be communicated with the gap between the shell and the insulation isolation cylinder through the diversion hole; in the glue filling process, glue liquid can flow on the inner side and the outer side of the insulation isolation cylinder through the flow guide holes, the flowing path of the glue liquid is increased, and the glue filling efficiency of the thin film capacitor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to capacitor technical field especially thin film capacitor insulating isolation cylinder and thin film capacitor. BACKGROUND

[0002] The thin film capacitor includes a metal shell and a core package, the core package is placed in the metal shell, and the core package and the metal shell are insulated. A kind of shell assembly and capacitor with it are disclosed in Chinese patent (authorized announcement number: CN217719323U), including shell, core package and insulating sleeve, core package is located in shell, and insulating sleeve is columnar and is formed with accommodating cavity, the top of insulating sleeve is equipped with second opening, and core package is located in accommodating cavity, and insulating sleeve is formed between core package and shell insulation.

[0003] However, the inner cavity of the above-mentioned insulating sleeve is only communicated with the space between the insulating sleeve and the shell through the opening at the top, which affects the filling flow of glue solution in the shell during the glue pouring process, and further affects the glue pouring efficiency of the thin film capacitor. UTILITY MODEL CONTENT

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an insulating isolation cylinder for a thin film capacitor and a thin film capacitor.

[0005] In a first aspect, the present application provides an insulating isolation cylinder for a thin film capacitor, comprising a cylinder body, the cylinder body includes a bottom wall part and a side wall part, the side wall part is annular and is arranged around the bottom wall part, a core package accommodating cavity is formed between the bottom wall part and the side wall part, the side wall part is provided with a through-flow hole, and the through-flow hole and the bottom wall part have a spacing therebetween.

[0006] Further, the side wall part is provided with an isolation protrusion corresponding to the through-flow hole on the side close to the core package accommodating cavity, the isolation protrusion is annular and is arranged around the axis of the through-flow hole.

[0007] Further, the isolation protrusion has at least one separation section in the circumferential direction.

[0008] Further, the through-flow hole is a plurality of, and the plurality of through-flow holes are arranged at intervals along the circumferential direction of the side wall part.

[0009] Further, it further includes a reinforcing ring, and the reinforcing ring is located at one end of the side wall part away from the bottom wall part.

[0010] Further, the reinforcing ring is arranged on the side of the side wall part close to the core package accommodating cavity.

[0011] Further, the side wall part is provided with a thickening part on one side in the thickness direction, and the thickening part forms a reinforcing ring.

[0012] In a second aspect, the present application also provides a thin film capacitor, comprising an insulating isolation cylinder for a thin film capacitor.

[0013] The insulating isolation cylinder and film capacitor provided in this application embodiment have a through-hole in the side wall of the insulating isolation cylinder, and there is a gap between the through-hole and the bottom wall. The gap between the insulating isolation cylinder and the core package and the gap between the outer shell and the insulating isolation cylinder can be connected through the through-hole. This allows the adhesive to flow through the through-hole inside and outside the insulating isolation cylinder during the potting process, increasing the flow path of the adhesive and improving the potting efficiency of the film capacitor. Attached Figure Description

[0014] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0015] Figure 1 This is a half-sectional schematic diagram of the insulating isolation cylinder provided in the embodiments of this application;

[0016] Figure 2 for Figure 1 Enlarged view of part A. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Please refer to the attached document. Figures 1-2The embodiment of the present application provides an insulating isolation cylinder 100 for a film capacitor, which comprises a cylinder body 110, the cylinder body 110 is prepared from an insulating material and has a cylindrical shape, and the material can be but is not limited to PP. The cylinder body 110 comprises a bottom wall part 111 and a side wall part 112, the side wall part 112 is annular and is arranged around the bottom wall part 111, a core package containing cavity is formed between the bottom wall part 111 and the side wall part 112, and an opening end is formed at one end of the side wall part 112 away from the bottom wall part 111. The film capacitor comprises a shell and a core package, the insulating isolation cylinder 100 is arranged in the shell, the core package is arranged in the core package containing cavity, that is, the insulating isolation cylinder 100 is located between the core package and the shell, and insulation between the shell and the core package is realized. There is a first gap between the shell and the insulating isolation cylinder 100, there is a second gap between the core package and the insulating isolation cylinder 100, and the first gap and the second gap can be communicated through the opening end. The side wall part 112 is provided with a flow guide hole 1121 penetrating through, and the flow guide hole 1121 and the bottom wall part 111 have a spacing. The flow guide hole 1121 can communicate the first gap and the second gap, so that the glue solution in the glue filling process can flow between the first gap and the second gap through the opening end and the flow guide hole 1121, the flow path of the glue solution is increased, and the glue filling efficiency of the film capacitor is improved.

[0020] The core package in the film capacitor is generally in a cylindrical shape, and the core package has a gold spraying layer only at two end faces. The flow guide hole 1121 is located on the side wall part 112 and has a spacing with the bottom wall part 111, so that the risk of conductive connection between the flow guide hole 1121 and the shell can be avoided. The spacing can be but is not limited to greater than or equal to 5 mm.

[0021] The flow guide hole 1121 can be one or more, for example, two or four.

[0022] The diameter of the flow guide hole 1121 can be but is not limited to 2-5 mm.

[0023] In some embodiments of the present application, the side wall part 112 is provided with an isolation protrusion 113 corresponding to the flow guide hole 1121 on the side close to the core package containing cavity. The isolation protrusion 113 is annular and is arranged around the axis of the flow guide hole 1121. The isolation protrusion 113 can ensure a safe distance between the flow guide hole 1121 and the core package, and further improve the insulation performance of the insulating isolation cylinder 100.

[0024] When the flow guide hole 1121 is multiple, the isolation protrusion 113 is also multiple and is arranged one by one corresponding to the multiple flow guide holes 1121.

[0025] Optionally, the isolation protrusion 113 has at least one partition segment 1131 in the circumferential direction thereof, which allows the glue flowing in the second gap to flow into the flow guide hole 1121. Preferably, the partition segment 1131 is multiple and is spaced apart in the circumferential direction of the isolation protrusion 113.

[0026] Optionally, the protrusion height of the isolation protrusion 113 relative to the side wall 112 can be, but is not limited to, 1-2 mm, etc.

[0027] In some embodiments of the present application, the insulation isolation cylinder 100 further comprises a reinforcing ring 114 located at one end of the side wall 112 away from the bottom wall 111. The opening end of the existing insulation sleeve with a thin wall thickness (usually the wall thickness is 1 mm) will be deformed due to lack of support during transportation, and the second gap is usually small (for example, 2-4 mm), which increases the assembly difficulty between the core package and the insulation sleeve. The reinforcing ring 114 in the present embodiment can strengthen the opening end of the side wall 112, reduce the extrusion deformation of the opening end of the insulation isolation cylinder 100 during transportation, and facilitate the assembly between the core package and the insulation isolation cylinder 100.

[0028] Optionally, the reinforcing ring 114 can be located on the side of the side wall 112 close to the core package containing cavity or on the side of the side wall 112 away from the core package containing cavity. Preferably, the reinforcing ring 114 is arranged on the side of the side wall 112 close to the core package containing cavity to avoid occupying the space of the first gap.

[0029] Optionally, the side wall 112 is provided with a thickening portion on one side in the thickness direction, and the thickening portion forms the reinforcing ring 114. The thickness of the thickening portion can be, but is not limited to, 0.5-1 mm. Alternatively, in other embodiments, the reinforcing ring 114 can also be a plastic ring, the hardness of the plastic ring is greater than that of the side wall 112, and the plastic ring and the side wall 112 are bonded. For example, when the material of the side wall 112 is PP, the material of the elastic plastic ring can be, but is not limited to, PVC, etc.

[0030] The present application also provides a film capacitor comprising the above-mentioned insulation isolation cylinder 100 for film capacitors.

[0031] It should be understood that the above-mentioned terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the orientation terms "inner" and "outer" refer to the inner and outer of the contour of each component itself. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features.

[0032] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper", etc. can be used to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned 90 degrees or in other orientations in other different ways, and the spatial relative descriptions used herein are interpreted accordingly.

[0033] The above description is only the preferred embodiment of the present application and the explanation of the technical principles applied. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the utility model concept. For example, the technical solutions formed by mutually replacing the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. An insulating spacer for a thin film capacitor, characterized by comprising a cylindrical body made of a resin, and a plurality of projections formed on the outer surface of the cylindrical body. The cylinder includes a bottom wall part and a side wall part, the side wall part is annular and is arranged around the bottom wall part, a core containing cavity is formed between the bottom wall part and the side wall part, the side wall part is provided with a flow guide hole, and the flow guide hole and the bottom wall part have a spacing.

2. The insulating spacer for a thin film capacitor according to claim 1, wherein The side wall part is provided with an isolation protrusion corresponding to the flow guide hole on the side close to the core containing cavity, the isolation protrusion is annular and is arranged around the axis of the flow guide hole.

3. The insulating spacer for a thin film capacitor according to claim 1, wherein The isolation protrusion has at least one separation section in the circumferential direction.

4. The insulating spacer for a thin film capacitor according to claim 1, wherein The flow guide hole is a plurality of flow guide holes, and the plurality of flow guide holes are arranged at intervals in the circumferential direction of the side wall part.

5. The insulating spacer for a thin film capacitor according to claim 1, wherein A reinforcing ring is further included, and the reinforcing ring is located at one end of the side wall part away from the bottom wall part.

6. The insulating spacer for a thin film capacitor according to claim 5, wherein The reinforcing ring is arranged on the side of the side wall part close to the core containing cavity.

7. The insulating spacer for a thin film capacitor according to claim 5, wherein The side wall part is provided with a thickened part on one side in the thickness direction, and the thickened part forms the reinforcing ring.

8. A thin film capacitor characterized by The insulating isolation cylinder for a thin film capacitor includes any one of claims 1-7.

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