Inductor, filter, inverter and vehicle
By using a protective case and filler adhesive in the nanocrystalline inductor, the problems of cracking and debris leakage of nanocrystalline tape under vibration environment are solved, the fixed connection is enhanced, the production process is simplified and the cost is reduced, and the performance stability of the inductor is improved.
Patent Information
- Application Number
- CN202520187489.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-06
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-02-06
AI Technical Summary
Existing nanocrystalline inductors are prone to cracking, peeling, and detachment under vibration, resulting in the outflow of metal debris, which affects the internal circuitry of the inverter. Furthermore, the intrusion of epoxy potting compound affects performance, and the production process is complex and costly.
The design employs a protective box structure and filler adhesive. The nanocrystalline ribbon is placed inside the receiving cavity of the protective box, and the filler adhesive fills the gap between the ribbon and the cavity wall to enhance the fixed connection and prevent epoxy potting compound from intruding.
It improves the vibration resistance of nanocrystalline ribbons, prevents metal debris from flowing out, simplifies the production process, reduces costs, and ensures stable inductor performance.
Smart Images
Figure CN223884233U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of automobiles, and particularly relates to an inductor, a filter, an inverter and a vehicle. BACKGROUND
[0002] A nanocrystalline inductor is an inductor with relatively excellent performance and plays an extremely important role in a filter of an inverter of a new energy automobile. The existing nanocrystalline inductor is currently composed of a plastic shell and a nanocrystalline strip. When assembled, the nanocrystalline strip needs to be first immersed in paint or sprayed with epoxy material, and then fixed in the plastic shell by means of point gluing. This kind of nanocrystalline inductor has relatively more production procedures, a complex process and a relatively high product cost. After the nanocrystalline inductor is arranged in the inverter, epoxy potting material needs to be filled into the inverter shell. In this process, the epoxy potting material is easy to invade the gap between the nanocrystalline strip and the plastic shell. The part of the epoxy potting material solidified will squeeze the nanocrystalline strip, so that the inductance of the nanocrystalline strip decreases, and then the performance of the nanocrystalline inductor decreases.
[0003] Under the vibration environment of the vehicle in operation, the nanocrystalline strip is easy to produce debris due to cracking, peeling and falling off and other factors. The existing nanocrystalline inductor cannot prevent the debris from flowing out, and is easy to cause short circuit of other lines or elements in the inverter. At the same time, the glue between the nanocrystalline strip and the plastic shell is also easy to crack due to the vibration environment, and the nanocrystalline strip is easy to be damaged due to the vibration environment. CONTENT OF THE UTILITY MODEL
[0004] In view of the above problems, the utility model is provided to overcome the above problems or at least partially solve the above problems.
[0005] In order to solve the above technical problems, the application is implemented as follows:
[0006] In a first aspect, the embodiments of the application provide an inductor, comprising a nanocrystalline strip, a protective box and a first filling glue.
[0007] The protective box comprises a box body and a cover body, the box body has a receiving cavity and an opening, the opening is in communication with the receiving cavity, and the cover body is sealed to the opening.
[0008] The nanocrystalline strip is arranged in the receiving cavity, and at least part of the side surface of the nanocrystalline strip has a gap with the cavity wall of the receiving cavity.
[0009] The first filling glue is filled in the gap between the side surface of the nanocrystalline strip and the cavity wall of the receiving cavity.
[0010] Optionally, the box body comprises a first box wall, a second box wall and a third box wall.
[0011] The first box wall is cylindrical to form a first through cavity for the copper bar of the filter to pass through; the second box wall is arranged around the first box wall and spaced from the first box wall; the third box wall is connected between the first end of the first box wall and the first end of the second box wall, and covers the gap between the first end of the first box wall and the first end of the second box wall, and the first box wall, the second box wall and the third box wall enclose the containing cavity, and the gap between the second end of the first box wall and the second end of the second box wall forms the opening.
[0012] The nanocrystalline strip is annular, and is arranged around the first box wall and the second box wall.
[0013] Optionally, the nanocrystalline strip includes a first annular surface and a second annular surface.
[0014] The first annular surface is opposite to and spaced from the first box wall, and the second annular surface is opposite to and spaced from the second box wall.
[0015] The first filling adhesive covers the nanocrystalline strip, and the first annular surface and the second annular surface form a side surface of the nanocrystalline strip.
[0016] Optionally, the nanocrystalline strip includes a first end surface and a second end surface.
[0017] The first end surface is opposite to and spaced from the third box wall, and the second end surface is opposite to and spaced from the cover.
[0018] Optionally, the nanocrystalline strip includes a first end surface and a second end surface.
[0019] The first end surface is attached to the third box wall, and the second end surface is attached to the cover.
[0020] Optionally, the cover includes a first side wall, a second side wall and a third side wall.
[0021] The first side wall is cylindrical to form a second through cavity, the second side wall is arranged around the first side wall and spaced from the first side wall, and the third side wall is connected between the first end of the first side wall and the first end of the second side wall, and covers the gap between the first end of the first side wall and the first end of the second side wall.
[0022] The first side wall covers the side of the first box wall away from the second box wall, the first through cavity and the second through cavity extend in the same direction and are communicated; and the second side wall covers the side of the second box wall away from the first box wall.
[0023] Optionally, the second end of the first box wall is provided with a first notch, and the first side wall cover is sealed and clamped in the first notch; the second end of the second box wall is provided with a second notch; and the second side wall cover is sealed and clamped in the second notch.
[0024] Optionally, the first filling glue is silica gel.
[0025] Optionally, a boss is arranged on the outer surface of the protective box, and a top surface of the boss is a plane and is used to contact an inner surface of the inverter shell.
[0026] In a second aspect, an embodiment of the present application provides a filter, the filter comprising any of the inductors as described above.
[0027] In a third aspect, an embodiment of the present application provides an inverter, the inverter comprising an inverter shell, a second filling glue, and any of the filters as described above.
[0028] The filter is arranged in the inverter shell, and the second filling glue is filled between an outer surface of the filter and an inner surface of the inverter shell.
[0029] In a fourth aspect, an embodiment of the present application provides a vehicle, the vehicle comprising any of the inverters as described above.
[0030] In the embodiment of the present application, the inductor comprises a nanocrystalline strip, a protective box, and a first filling glue. The protective box comprises a box body and a cover body, the nanocrystalline strip is arranged in a containing cavity of the box body, and the cover body is sealed at an opening of the box body. There is a gap between at least part of a side surface of the nanocrystalline strip and a cavity wall of the containing cavity, and the first filling glue is filled in the gap between the side surface of the nanocrystalline strip and the cavity wall of the containing cavity.
[0031] Under the protection of the box body and the cover body, the epoxy potting material of the inverter is not easy to invade into the inductor, and metal debris of the nanocrystalline strip is also not easy to flow out of the inductor. Compared with the fixing mode of two end point glues, the first filling glue filled between at least part of the side surface of the nanocrystalline strip and the box body can increase the fixed connection area between the nanocrystalline strip and the box body, and further improve the connection strength between the nanocrystalline strip and the box body, so as to prevent the nanocrystalline strip and the box body from being disconnected and damaged in a vibration environment. Meanwhile, the first filling glue can further prevent the epoxy potting material of the inverter from invading into the inductor, and can further prevent the metal debris of the nanocrystalline strip from flowing out of the inductor.
[0032] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS
[0033] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings, of which:
[0034] Figure 1 is an axonometric view of the inductor described in the present application;
[0035] Figure 2 is an exploded view of Figure 1
[0036] Figure 3 is a cutaway schematic view of Figure 2
[0037] Figure 4 is an axonometric view of the inductor and the copper bar of the filter described in the present application;
[0038] Figure 5 is an axonometric view of the inverter housing and the filter of the inverter described in the present application;
[0039] Fig. 1 is an inductor; Fig. 11 is a nanocrystalline strip; Fig. 111 is a first end face; Fig. 112 is a second end face; Fig. 113 is a first annular face; Fig. 114 is a second annular face; Fig. 12 is a protective box; Fig. 121 is a box body; Fig. 1211 is a containing cavity; Fig. 1212 is an opening; Fig. 1213 is a first box wall; Fig. 1214 is a second box wall; Fig. 1215 is a third box wall; Fig. 1216 is a first through cavity; Fig. 1217 is a first notch; Fig. 1218 is a second notch; Fig. 122 is a cover body; Fig. 1221 is a first side wall; Fig. 1222 is a second side wall; Fig. 1223 is a third side wall; Fig. 1224 is a second through cavity; Fig. 123 is a boss; Fig. 1231 is a mesa; Fig. 13 is a first filling glue; Fig. 2 is a copper bar; Fig. 3 is an insulating structure; Fig. 4 is an inverter housing; Fig. 5 is a second filling glue. DETAILED DESCRIPTION
[0040] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0041] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.
[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate 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 limiting the present application.
[0043] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0044] Referring to Figure 1 , a kind of inductor 1 described in the embodiment of the present application is shown.The inductor 1 described in the present application is applied to filter, referring to Figure 2 , inductor 1 specifically includes nanocrystalline strip 11, protective box 12 and first filling glue 13.
[0045] Nanocrystalline strip 11 is a strip-shaped material made of nanocrystalline material.Nanocrystalline material is a material composed of nanoscale crystals.The thickness of the strip made of it is relatively thin, usually below 100um.When applied in inductor 1, nanocrystalline strip 11 is usually wound and placed.
[0046] Referring to Figure 2The protective box 12 specifically comprises a box body 121 and a cover body 122. The box body 121 has a containing cavity 1211 and an opening 1212, and the opening 1212 communicates with the containing cavity 1211. When installed, the nanocrystalline strip 11 is loaded into the containing cavity 1211 of the box body 121 from the opening 1212. After the nanocrystalline strip 11 is installed in place, the cover body 122 is sealed at the opening 1212 of the box body 121, so that the nanocrystalline strip 11 is completely enclosed in the protective box 12. After the nanocrystalline strip 11 is installed in the containing cavity 1211, there is a gap between at least part of the side surface of the nanocrystalline strip 11 and the cavity wall of the containing cavity 1211. The gap is filled with the first filling glue 13, so as to fix the nanocrystalline strip 11 in the protective box 12.
[0047] When the inductor 1 is applied in a vibrating environment, due to the brittle texture and extremely small thickness of the nanocrystalline strip 11, the nanocrystalline strip 11 is prone to cracking, peeling and falling off due to vibration. In this process, metal debris will be generated from the nanocrystalline strip 11, and if the metal debris flows out of the inductor 1, it is easy to cause short circuit of external lines, thereby affecting the normal operation of the entire device. For example, when the inductor 1 is applied to the inverter of a vehicle, if the metal debris of the nanocrystalline strip 11 flows out of the inductor 1, it is very likely to cause short circuit of internal lines of the inverter. This will seriously affect the normal driving of the vehicle and easily threaten the life and property safety of the passengers on the vehicle. In the present application, the cover body 122 and the box body 121 can form a closed containing cavity 1211. When the nanocrystalline strip 11 is installed in the containing cavity 1211, the metal debris generated from the nanocrystalline strip 11 is not easy to flow out of the protective box 12. The first filling glue 13 filled between the nanocrystalline strip 11 and the box body 121 can play a second protective role to further prevent the debris of the nanocrystalline strip 11 from flowing out of the inductor 1.
[0048] The original inductor 1 using the nanocrystalline strip 11 usually fixes the nanocrystalline strip 11 in the protective box 12 by using the method of two-point glue, that is, the opposite ends of the nanocrystalline strip 11 are fixed to the protective box 12 by glue. In a vibrating environment, the glue between the nanocrystalline strip 11 and the protective box 12 is prone to breakage. The nanocrystalline strip 11 that loses fixation will vibrate relative to the protective box 12 under the influence of the environment, which is easy to cause damage to the nanocrystalline strip 11. In the present application, the first filling glue 13 is filled in the gap between at least part of the side surface of the nanocrystalline strip 11 and the box body 121, which increases the fixed connection area of the nanocrystalline strip 11 and the box body 121. In this way, the anti-vibration capability of the inductor 1 can be improved.
[0049] For the inductor 1 used in the inverter, the protective case 12 and the first filler 13 can isolate the nanocrystalline ribbon 11 from the outside environment. Specifically, after the inductor 1 is placed in the inverter housing 4 of the inverter, epoxy potting compound is usually added to the inverter housing 4. During this process, the epoxy potting compound can easily enter the interior of the inductor 1. The epoxy potting compound that has entered the interior of the inductor 1 will generate shrinkage stress during the curing process and squeeze the nanocrystalline ribbon 11, thereby reducing the final inductance of the inductor 1. The housing 121 and the cover 122 can serve as the first layer of protection to prevent the epoxy potting compound from entering the inductor 1, and the first filler 13 filled in the housing 121 and the nanocrystalline ribbon 11 can serve as the second layer of protection to prevent the epoxy potting compound from further penetrating into the interior of the inductor 1.
[0050] Reference Figure 2 , Figure 3 In some embodiments of this application, the box body 121 specifically includes a first box wall 1213, a second box wall 1214, and a third box wall 1215. The first box wall 1213 forms a cylindrical shape to create a first through cavity 1216. In other words, the first box wall 1213 has a cylindrical structure, and the inner cavity of this cylindrical structure is the first through cavity 1216. (Refer to...) Figure 4 The first through cavity 1216 is used for the copper busbars 2 of the filter to pass through. Typically, the filter has pairs of copper busbars 2. The pairs of copper busbars 2 can be stacked together along their thickness direction, separated by an insulating structure 3 such as insulating paper or insulating pads, and both pass through the first through cavity 1216. Compared to a technical solution that sets two independent through cavities on the housing and places the two copper busbars 2 in separate through cavities, this allows for a more compact structure of the inductor 1 and reduces the space occupied by the inductor 1. The second housing wall 1214 surrounds the first housing wall 1213.
[0051] The second box wall 1214 faces the side of the first box wall 1213, with a gap between it and the side of the first box wall 1213 facing the second box wall 1214. The third box wall 1215 connects the first end of the first box wall 1213 and the first end of the second box wall 1214, simultaneously sealing the gap between the first ends of the first box wall 1213 and the second box wall 1214. In this manner, the first box wall 1213, the second box wall 1214, and the third box wall 1215 enclose the aforementioned receiving cavity 1211. The gap between the second end of the first box wall 1213 and the second end of the second box wall 1214 forms the aforementioned opening 1212. A nanocrystalline ribbon 11 is wound into a ring structure and disposed around the first box wall 1213 and the second box wall 1214. (See reference...) Figure 2 and Figure 3As shown, the first end of the first box wall 1213 and the first end of the second box wall 1214 are the ends of the first box wall 1213 and the second box wall 1214 that are away from the cover 122.
[0052] Reference Figure 2 , Figure 3 In some embodiments of this application, the nanocrystalline ribbon 11 wound into a ring structure specifically includes a first ring surface 113 and a second ring surface 114. The first ring surface 113 and the second ring surface 114 form the side surfaces of the nanocrystalline ribbon 11. The first ring surface 113 is opposite to and spaced apart from the first box wall 1213, and the second ring surface 114 is opposite to and spaced apart from the second box wall 1214. A first filler adhesive 13 is placed in the gaps and covers the nanocrystalline ribbon 14. Since the first ring surface 113 and the second ring surface 114 can provide a large connection area, the above arrangement can ensure a good fixed connection between the nanocrystalline ribbon 11 and the box body 121. At the same time, the first filler adhesive 13 covering the side surfaces of the nanocrystalline ribbon 11 can prevent metal debris generated by the nanocrystalline ribbon 11 from flowing out of the protective box 12 as much as possible, and isolate the side surfaces of the nanocrystalline ribbon 11 from the outside.
[0053] Reference Figure 2 , Figure 3 In some embodiments of this application, the nanocrystalline ribbon 11 wound into a ring structure further includes a first end face 111 and a second end face 112. The first end face 111 is opposite to and spaced apart from the third box wall 1215, and the second end face 112 is opposite to and spaced apart from the cover 122. In other words, there are gaps between the nanocrystalline ribbon 11 and the box 121 and the cover 122. The first filler adhesive 13 is in the above-mentioned gaps and completely covers the nanocrystalline ribbon 11. The volume of the first filler adhesive 13 filling the gap between the nanocrystalline ribbon 11 and the box 121 depends on the actual needs. Specifically, the volume of the first filler adhesive 13 can be equal to the total volume of the gap space between the nanocrystalline ribbon 11 and the box 121, or it can be equal to a portion of the gap space between the nanocrystalline ribbon 11 and the box 121.
[0054] The existing inductor 1 needs to be sprayed with epoxy material on the nanocrystalline strip 11 or be pre-impregnated with paint on the nanocrystalline strip 11 when assembled, so as to prevent the nanocrystalline strip 11 from generating a large amount of metal debris in the use process, thereby affecting the performance and normal operation of the inductor 1. Before being loaded into the matched plastic shell, the two opposite end faces of the nanocrystalline strip 11 are pre-coated with fixing glue, so that the nanocrystalline strip 11 can be fixed in the matched plastic shell. The inductor 1 described in the present application can be directly assembled into the box body 121 after the nanocrystalline strip 11 is cooled to room temperature when assembled, without pre-impregnation or spraying of epoxy material. After the nanocrystalline strip 11 is assembled in place, the first filling glue 13 is poured into the box body 121. The first filling glue 13 flows flat and fills the gap between the nanocrystalline strip 11 and the box body 121, and covers all surfaces of the nanocrystalline strip 11. Since the nanocrystalline strip 11 is covered by the first filling glue 13, the nanocrystalline strip 11 is not easy to generate metal debris that can fall off in a vibrating environment, thus completely eliminating the possibility of metal debris flowing out of the inductor 1, avoiding the risk of short circuit or failure of the external circuit of the inductor 1. At the same time, the first filling glue 13 filled between the nanocrystalline strip 11 and the box body 121 increases the fixed connection area between the nanocrystalline strip 11 and the box body 121, so that the nanocrystalline strip 11 has a better fixing effect inside the box body 121, thereby effectively improving the anti-vibration performance of the inductor 1.
[0055] Compared with the existing inductor 1, the inductor 1 described in the present application uses the first filling glue 13 covering the nanocrystalline strip 11 to fix the nanocrystalline strip 11 in the box body 121, while preventing the nanocrystalline strip 11 from generating a large amount of metal debris in the use process. In this way, the nanocrystalline strip 11 does not need to be pre-impregnated with paint or sprayed with epoxy material on the surface. Therefore, the inductor 1 described in the present application can effectively simplify the production and processing technology of the inductor 1, improve the production and processing efficiency of the inductor 1, and at the same time reduce the production and processing cost of the inductor 1.
[0056] Reference Figure 5When the inductor 1 is installed in the inverter, the inductor 1 is first placed in the inverter housing 4, and then the epoxy potting material is poured into the inverter housing 4, so that the outer surface of the inductor 1 is entirely or partially covered by the epoxy potting material. At this time, the box body 121 and the cover body 122 can prevent the epoxy potting material from invading the inside of the inductor 1. However, the sealing effect between the box body 121 and the cover body 122 is limited, and the first filling glue 13 covering the nanocrystalline ribbon 11 can serve as a second protection to completely separate the epoxy potting material from the nanocrystalline ribbon 11. In this way, when the epoxy potting material solidifies, the shrinkage stress of the epoxy potting material invading the protective box 12 will be absorbed by the first filling glue 13 and will not continue to act on the nanocrystalline ribbon 11, so that the inductance performance of the inductor 1 will not be affected by the epoxy potting material invading the protective box 12, and the product performance is further improved.
[0057] In other embodiments, the first end surface 111 or the second end surface 112 of the nanocrystalline ribbon 11 can also be attached to the corresponding surface on the protective box 12, that is, the first end surface 111 of the nanocrystalline ribbon 11 is attached to the third box wall 1215, the second end surface 112 is attached to the cover body 122, and the first ring surface 113 and the second ring surface 114 of the nanocrystalline ribbon 11 are arranged in a spaced manner between the box body 121. Compared with the technical solution of fully covering the nanocrystalline ribbon 11 with the first filling glue 13, the above-mentioned arrangement can avoid filling the first filling glue 13 between the first end surface 111 of the nanocrystalline ribbon 11 and the third box wall 1215, and between the second end surface 112 and the cover body 122. While meeting the need for fixed connection, this can reduce the amount of first filling glue 13 required in the inductor 1, and thus reduce the production and processing cost of the inductor 1.
[0058] Referring to Figure 2 , Figure 3 In some embodiments of the present application, the cover body 122 specifically includes a first side wall 1221, a second side wall 1222, and a third side wall 1223. The first side wall 1221 forms a cylindrical shape to form a second through cavity 1224. In other words, the first side wall 1221 is in a cylindrical structure, and the inner cavity of the cylindrical structure is the second through cavity 1224. The second side wall 1222 is arranged around the first side wall 1221. The side of the second side wall 1222 facing the first side wall 1221 is spaced from the side of the first side wall 1221 facing the second side wall 1222. The third side wall 1223 is connected between the first end of the first side wall 1221 and the first end of the second side wall 1222, and covers the gap between the first end of the first side wall 1221 and the first end of the second side wall 1222. For reference Figure 2 and Figure 3 , the first end of the first side wall 1221 and the first end of the second side wall 1222 are the ends of the first side wall 1221 and the second side wall 1222 facing away from the box body 121.
[0059] During installation, the first side wall 1221 covers the side of the first box wall 1213 which is away from the second box wall 1214. In other words, the first side wall 1221 in a cylindrical shape is inserted into the first through cavity 1216 surrounded by the first box wall 1213, so that the first through cavity 1216 and the second through cavity 1224 extend in the same direction and are in communication with each other. The second side wall 1222 covers the side of the second box wall 1214 which is away from the first box wall 1213. In this way, the cover 122 can completely cover the opening 1212 of the box 121, which is conducive to improving the sealing between the box 121 and the cover 122.
[0060] Referring to Figure 2 , Figure 3 In some embodiments of the present application, the nanocrystalline strip 11 is wound into a racetrack-shaped annular structure. Correspondingly, the first box wall 1213 and the second box wall 1214 of the box 121 also correspond to a racetrack-shaped cylindrical structure to form a containing cavity 1211 adapted to the nanocrystalline strip 11. The first side wall 1221 and the second side wall 1222 of the cover 122 also correspond to a racetrack-shaped cylindrical structure according to the shape of the box 121, so as to ensure that the cover 122 can be well covered on the opening 1212 of the box 121.
[0061] Referring to Figure 2 , Figure 3In some embodiments of the present application, the second end of the first box wall 1213 is provided with a first notch 1217, and the first side wall 1221 is covered and clamped on the first notch 1217. Specifically, the thickness of the edge portion of the second end of the first box wall 1213, which is away from the third box wall 1215, is smaller than that of other portions to form the first notch 1217. When the cover 122 is installed on the box 121, the first side wall 1221 of the box 121 is clamped into the first notch 1217. The side of the first notch 1217, which is opposite to the first side wall 1221, can be provided with a protrusion, and the first side wall 1221 is provided with a clamping groove or a clamping protrusion which is matched with the protrusion. When the first side wall 1221 is clamped on the first notch 1217, the clamping protrusion on the first notch 1217 is clamped into the clamping groove on the first side wall 1221 or beside the clamping protrusion on the first side wall 1221, so as to prevent the cover 122 from falling off the box 121. Similarly, the second end of the second box wall 1214 is provided with a second notch 1218, and the second side wall 1222 is covered and clamped on the second notch 1218. Specifically, the thickness of the edge portion of the second end of the second box wall 1214, which is away from the third box wall 1215, is smaller than that of other portions to form the second notch 1218. When the cover 122 is installed on the box 121, the second side wall 1222 of the box 121 is clamped into the second notch 1218. The side of the second notch 1218, which is opposite to the second side wall 1222, can be provided with a protrusion, and the second side wall 1222 is provided with a clamping groove or a clamping protrusion which is matched with the protrusion. When the second side wall 1222 is clamped on the second notch 1218, the clamping protrusion on the second notch 1218 is clamped into the clamping groove on the second side wall 1222 or beside the clamping protrusion on the second side wall 1222, so as to prevent the cover 122 from falling off the box 121. The first notch 1217 and the second notch 1218 facilitate the positioning of the cover 122 during installation. Meanwhile, the first side wall 1221 and the first box wall 1213, and the second side wall 1222 and the second box wall 1214 have clamping relationship, which facilitates the stable clamping of the cover 122 on the box 121, and thus ensures the reliability of the protection effect of the cover 122 and the box 121.
[0062] In some embodiments of this application, the first filler 13 is specifically silicone. Silicone has a low viscosity before curing, and after being potted into the housing 121, it can uniformly fill the gap between the nanocrystalline ribbon 11 and the housing 121. This prevents local defects caused by uneven flow of the first filler 13, ensuring that the nanocrystalline ribbon 11 is completely encapsulated by the silicone after potting. Simultaneously, silicone has good elasticity, effectively absorbing the shrinkage stress after the epoxy potting compound cures, thus reducing the stress acting on the nanocrystalline ribbon 11 to negligible levels. Therefore, using silicone as the first filler 13 provides buffer protection for the entire nanocrystalline ribbon 11, preventing the inductor 1 from losing inductance due to the curing of the epoxy potting compound when used in an inverter, further improving the performance of the final product.
[0063] Reference Figure 2 , Figure 3 In some embodiments of this application, a boss 123 is also provided on the outer surface of the protective case 12. The boss 123 protrudes from one side of the protective case 12 and has a platform 1231 that is flat relative to the surface of the protective case 12. In use, the inductor 1 is placed inside the inverter housing 4. The platform 1231 of the boss 123 contacts the inner surface of the inverter housing 4 to ensure that the inductor 1 can be placed more stably inside the inverter housing 4.
[0064] Secondly, embodiments of this application propose a filter, which includes an inductor 1 as described above. The filter also includes related electronic components such as a copper busbar 2. (Refer to...) Figure 4 During installation, the copper busbar 2 passes through the inductor 1 and is electrically connected to other electronic components.
[0065] Specifically, the inductor 1 includes a nanocrystalline ribbon 11, a protective case 12, and a first filler adhesive 13. The nanocrystalline ribbon 11 is a ribbon material made of nanocrystalline material, which is wound into a ring structure, specifically including a first end face 111, a second end face 112, a first ring face 113, and a second ring face 114.
[0066] The protective box 12 specifically comprises a box body 121 and a cover body 122. The box body 121 has a containing cavity 1211 and an opening 1212, and the opening 1212 communicates with the containing cavity 1211. The box body 121 specifically comprises a first box wall 1213, a second box wall 1214 and a third box wall 1215. The first box wall 1213 is in a cylindrical shape to form a first through cavity 1216. The second box wall 1214 is arranged around the first box wall 1213. The second box wall 1214 is spaced from the side of the first box wall 1213 facing the second box wall 1214. The third box wall 1215 is connected between the first end of the first box wall 1213 and the first end of the second box wall 1214, and simultaneously covers the gap between the first end of the first box wall 1213 and the first end of the second box wall 1214. In the above manner, the first box wall 1213, the second box wall 1214 and the third box wall 1215 enclose the aforementioned containing cavity 1211. The gap between the second end of the first box wall 1213 and the second end of the second box wall 1214 forms the aforementioned opening 1212.
[0067] The nanocrystalline strip 11 is arranged around the first box wall 1213 and the second box wall 1214. The first end surface 111 of the nanocrystalline strip 11 is arranged opposite and spaced from the third box wall 1215, the second end surface 112 is arranged opposite and spaced from the cover body 122, the first annular surface 113 is arranged opposite and spaced from the first box wall 1213, and the second annular surface 114 is arranged opposite and spaced from the second box wall 1214. In other words, the nanocrystalline strip 11 has a gap with the box body 121 and the cover body 122. The first filling glue 13 is in the aforementioned gap and fully covers the nanocrystalline strip 11.
[0068] The cover body 122 specifically comprises a first side wall 1221, a second side wall 1222 and a third side wall 1223. The first side wall 1221 is in a cylindrical shape to form a second through cavity 1224. The second side wall 1222 is arranged around the first side wall 1221. The second side wall 1222 is spaced from the side of the first side wall 1221 facing the second side wall 1222. The third side wall 1223 is connected between the first end of the first side wall 1221 and the first end of the second side wall 1222, and covers the gap between the first end of the first side wall 1221 and the first end of the second side wall 1222.
[0069] In the installation, the nanocrystalline strip 11 is loaded into the accommodating cavity 1211 of the box body 121 from the opening 1212, and then the first filling glue 13 is filled into the gap between the nanocrystalline strip 11 and the cavity wall of the accommodating cavity 1211, so as to fix the nanocrystalline strip 11 in the protective box 12. The first filling glue 13 is specifically silicone. Finally, the cover body 122 is clamped on the box body 121, and the first side wall 1221 of the cover body 122 is covered on the side of the first box wall 1213 away from the second box wall 1214. In other words, the first side wall 1221 in the form of a cylinder is inserted into the first through cavity 1216 surrounded by the first box wall 1213, so that the first through cavity 1216 and the second through cavity 1224 extend in the same direction and communicate with each other. The second side wall 1222 is covered on the side of the second box wall 1214 away from the first box wall 1213. After the inductor 1 is assembled, the copper bars 2 of the filter pass through the first through cavity 1216 and the second through cavity 1224. Usually, the filter has a pair of copper bars 2. The pair of copper bars 2 can be stacked together in the thickness direction, and are separated by an insulating structure 3 such as insulating paper or insulating pad, and pass through the first through cavity 1216 and the second through cavity 1224 together.
[0070] In summary, the filter described in the embodiments of the present application can at least have the following advantages:
[0071] Firstly, since the cover body 122 and the box body 121 can form a closed accommodating cavity 1211, when the nanocrystalline strip 11 is installed in the accommodating cavity 1211, metal scraps generated by the nanocrystalline strip 11 are not easy to flow out to the outside of the protective box 12. The first filling glue 13 filled between the nanocrystalline strip 11 and the box body 121 can play a second protective role, so as to further prevent the nanocrystalline strip 11 from flowing out to the outside of the inductor 1. The filter will not affect the normal operation of other external lines due to the metal scraps flowing out of the inductor 1, which is beneficial to ensure the reliability of the final product.
[0072] The original inductor 1 using the nanocrystalline strip 11 usually fixes the nanocrystalline strip 11 in the protective box 12 by using the two-point glue method, that is, the opposite ends of the nanocrystalline strip 11 are fixed to the protective box 12 by glue. In a vibration environment, the glue between the nanocrystalline strip 11 and the protective box 12 is easy to break. The nanocrystalline strip 11 that loses fixation will vibrate relative to the protective box 12 under the influence of the environment, which is easy to cause damage to the nanocrystalline strip 11. In the present application, the first filling glue 13 is filled in the gap between the nanocrystalline strip 11 and the box body 121, which increases the fixed connection area of the nanocrystalline strip 11 and the box body 121. In this way, the vibration resistance of the inductor 1 can be improved, and the vibration resistance of the filter is further ensured.
[0073] When the filter is applied in the inverter, the inductor 1 of the filter needs to be placed in the inverter housing 4 first, and then the epoxy pouring material is poured into the inverter housing 4, so that the outer surface of the inductor 1 is entirely or partially covered by the epoxy pouring material. At this time, the box body 121 and the housing can prevent the epoxy pouring material from invading the inside of the inductor 1. The first filling glue 13 covering the nanocrystalline strip material 11 can serve as a second protection to completely isolate the epoxy pouring material from the nanocrystalline strip material 11. In this way, when the epoxy pouring material is solidified, the shrinkage stress of the epoxy pouring material invading the protective box 12 can be absorbed by the first filling glue 13, and will not continue to act on the nanocrystalline strip material 11, so that the inductance performance of the inductor 1 will not be affected by the epoxy pouring material invading the protective box 12, and the performance of the filter is further improved.
[0074] In addition, the inductor 1 described in the present application uses the first filling glue 13 covering the nanocrystalline strip material 11 to fix the nanocrystalline strip material 11 in the box body 121, while preventing the nanocrystalline strip material 11 from generating a large amount of metal debris during use. In this way, the nanocrystalline strip material 11 does not need to be pre-impregnated with paint, and the surface of the nanocrystalline strip material 11 does not need to be sprayed with an epoxy material. Therefore, by using the inductor 1 described in the present application, the production and processing technology of the filter can be effectively simplified, the production and processing efficiency of the filter can be improved, and the production and processing cost of the filter can be reduced.
[0075] In a third aspect, the embodiments of the present application provide an inverter, which refers to Figure 5 The inverter includes an inverter housing 4, a second filling glue 5, and any one of the filters described above.
[0076] In use, the filter is arranged in the inverter housing 4, and the second filling glue 5 is filled between the outer surface of the filter and the inner surface of the inverter housing 4. The second filling glue 5 is specifically the epoxy pouring material described above.
[0077] In a fourth aspect, the embodiments of the present application provide a vehicle, which includes the inverter described above.
[0078] For example, in the embodiments of the present application, the vehicle can include a small car, a medium car, a three-door car, a truck, a trailer, a CDV (Car Derived Van, a van based on a car platform), an MPV (multi-Purpose Vehicles, a multi-purpose vehicle), an SUV (Sport Utility Vehicles, a sport utility vehicle), and the like. The specific type of the vehicle can not be limited in the embodiments of the present application. The inverter can convert the high-voltage direct current input by the battery of the vehicle into three-phase alternating current with adjustable amplitude, frequency, and phase to drive the motor of the vehicle to rotate at a set torque and speed, so as to ensure the normal driving of the vehicle.
[0079] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0080] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.
Claims
1. An inductor characterized by, The nanocrystalline strip (11), a protective box (12) and a first filling glue (13) are included. The protective box (12) includes a box body (121) and a cover body (122), the box body (121) has a containing cavity (1211) and an opening (1212), the opening (1212) communicates with the containing cavity (1211), and the cover body (122) is sealed on the opening (1212). The nanocrystalline strip (11) is arranged in the containing cavity (1211), and a gap is formed between at least part of a side surface of the nanocrystalline strip (11) and a cavity wall of the containing cavity (1211). The first filling glue (13) is filled in the gap between the side surface of the nanocrystalline strip (11) and the cavity wall of the containing cavity (1211).
2. The inductor of claim 1, wherein, The box body (121) includes a first box wall (1213), a second box wall (1214) and a third box wall (1215). The first box wall (1213) is in a cylindrical shape to form a first through cavity (1216) for a copper bar (2) of a filter to pass through, the second box wall (1214) is arranged around the first box wall (1213) and is spaced apart from the first box wall (1213), the third box wall (1215) is connected between a first end of the first box wall (1213) and a first end of the second box wall (1214), and the third box wall (1215) seals a gap between the first end of the first box wall (1213) and the first end of the second box wall (1214), the first box wall (1213), the second box wall (1214) and the third box wall (1215) enclose the containing cavity (1211), and a gap between a second end of the first box wall (1213) and a second end of the second box wall (1214) forms the opening (1212). The nanocrystalline strip (11) is in a ring structure and is arranged around the first box wall (1213) and the second box wall (1214).
3. The inductor of claim 2, wherein, The nanocrystalline strip (11) includes a first ring surface (113) and a second ring surface (114). The first ring surface (113) is opposite to and spaced apart from the first box wall (1213), and the second ring surface (114) is opposite to and spaced apart from the second box wall (1214). The first filling glue (13) covers the nanocrystalline strip (11), and the first ring surface (113) and the second ring surface (114) form a side surface of the nanocrystalline strip (11).
4. The inductor of claim 3, wherein, The nanocrystalline strip (11) includes a first end surface (111) and a second end surface (112). The first end surface (111) is opposite to and spaced apart from the third box wall (1215), and the second end surface (112) is opposite to and spaced apart from the cover body (122).
5. The inductor of claim 3, wherein, The nanocrystalline strip (11) includes a first end surface (111) and a second end surface (112). The first end surface (111) is attached to the third box wall (1215), and the second end surface (112) is attached to the cover (122).
6. The inductor of claim 2, wherein The cover (122) comprises a first side wall (1221), a second side wall (1222), and a third side wall (1223). The first side wall (1221) is cylindrical to form a second through cavity (1224), the second side wall (1222) surrounds and is spaced apart from the first side wall (1221), the third side wall (1223) is connected between the first end of the first side wall (1221) and the first end of the second side wall (1222), and the third side wall (1223) covers the gap between the first end of the first side wall (1221) and the first end of the second side wall (1222). The first side wall (1221) covers the side of the first box wall (1213) away from the second box wall (1214), the first through cavity (1216) and the second through cavity (1224) extend in the same direction and are in communication, and the second side wall (1222) covers the side of the second box wall (1214) away from the first box wall (1213).
7. The inductor of claim 6, wherein, The second end of the first box wall (1213) is provided with a first notch (1217), the first side wall (1221) covers and is clamped in the first notch (1217), the second end of the second box wall (1214) is provided with a second notch (1218), and the second side wall (1222) covers and is clamped in the second notch (1218).
8. The inductor of any one of claims 1-7, wherein, The first filling glue (13) is silica gel.
9. The inductor of any of claims 1-7, wherein, The outer surface of the protective box (12) is provided with a boss (123), the mesa (1231) of the boss (123) is a plane and is used for contacting the inner surface of the inverter shell (4).
10. A filter, characterized by, The filter comprises the inductor (1) of any one of claims 1-9.
11. An inverter, characterized by comprising: The inverter comprises an inverter shell (4), a second filling glue (5), and the filter of claim 10. The filter is arranged in the inverter shell (4), and the second filling glue (5) is filled between the outer surface of the filter and the inner surface of the inverter shell (4).
12. A vehicle characterized by comprising: The inverter comprises the inverter of claim 11. The inverter comprises the inverter of claim 11.