Limiting structure and capacitor thereof
The design of the limiting structure solves the problem of unstable fixation of the capacitor core in capacitor production, achieves efficient production and high yield of capacitors, and reduces production costs.
Patent Information
- Application Number
- CN202422645885.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-10-30
AI Technical Summary
During the production process of existing capacitors, the capacitor core cannot be stably and accurately fixed in the capacitor shell, resulting in a complex production process, high cost and low yield.
A limiting structure is designed, including a connecting part and a contact part. The shell and the limiting part are integrally formed using BMC material to ensure that the capacitor core does not move during the resin potting process. An arc-shaped contact surface is used to increase the contact area, and the terminal and the connecting part are not in the same plane to ensure stable fixation.
The precise positioning of the capacitor core is achieved, production efficiency and yield rate are improved, production costs are reduced, and the stability and insulation of the limiting structure are enhanced.
Smart Images
Figure CN223486863U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of capacitor technology, and in particular to a limiting structure and its capacitor. Background Technology
[0002] Currently, most capacitors used in inverters for new energy vehicles employ resin-encapsulated capacitor cores to improve their sealing. This is to prevent moisture absorption by the core during long-term use, which can degrade the capacitor's electrical characteristics. In existing capacitor manufacturing processes, the capacitor core is placed inside the capacitor casing before resin encapsulation. However, during the actual encapsulation process, the capacitor core tends to float on the liquid resin, making it difficult to stably and accurately fix it within the capacitor casing. Current technology involves fixing the capacitor core using external equipment during resin cooling, which increases the production process and costs. Utility Model Content
[0003] To address the aforementioned problems, the purpose of this utility model is to provide a limiting structure and its capacitor, ensuring the positioning accuracy of the capacitor core during the production process and improving the production efficiency and yield of the capacitor.
[0004] The technical solution adopted by this utility model to solve its problem is:
[0005] In a first aspect, this application provides a limiting structure applied to a capacitor core and a housing, comprising: a limiting portion, wherein the housing has a cavity for accommodating the capacitor core; the limiting portion includes a connecting portion and a contact portion, the connecting portion being fixed to the inner wall of the cavity; the contact portion being fixedly connected to the housing via the connecting portion; the connecting portion being located above the capacitor core, and the contact portion being in contact with the capacitor core.
[0006] The aforementioned limiting structure has at least the following beneficial effects: by setting the outer shell and the limiting part, the capacitor core can be stably fixed in the cavity, avoiding displacement of the capacitor core during resin potting, and improving the positioning accuracy and structural stability of the limiting structure; by setting the connecting part and the contact part, the limiting part can fit the capacitor core through the contact part, so that the capacitor core can be accurately fixed in the cavity, improving the production efficiency and yield of capacitors.
[0007] Furthermore, there are four connecting parts, which are evenly distributed on both sides of the cavity. This structure ensures that the connecting parts can apply pressure to the capacitor core stably and evenly, preventing displacement of the capacitor core during resin potting and improving the positioning accuracy of the limiting structure.
[0008] Furthermore, the cross-sectional area of the connecting part gradually decreases along the direction close to the capacitor core. This structure ensures that the connecting part can be stably fixed to the inner wall of the cavity, preventing the connecting part from loosening during use and improving the stability of the limiting structure.
[0009] Furthermore, the lower end of the contact portion is provided with a contact surface that mates with the capacitor core. By providing a contact surface, the contact portion can stably apply pressure to the capacitor core, thereby improving the production efficiency of the capacitor.
[0010] Furthermore, the contact surface is arc-shaped. This structure effectively increases the contact area between the contact part and the capacitor core, preventing collisions during contact and thus avoiding damage to the capacitor core, thereby improving the production efficiency and yield of the capacitor.
[0011] Furthermore, terminals are connected to the two poles of the capacitor core, and these terminals are fixed to the inner wall of the cavity. By providing terminals, it is easier for the limiting structure to extend outwards to the capacitor core, thus improving the usability of the limiting structure.
[0012] Furthermore, the inner wall surface of the cavity where the terminal is located is perpendicular to the inner wall surface of the cavity where the connecting part is located. This structure avoids the terminal and the connecting part being on the same plane, which would affect the stability of the capacitor core during resin potting and ensure the production efficiency of the capacitor.
[0013] Furthermore, the limiting part is integrally formed with the outer shell. This integral forming effectively ensures the stability of the limiting structure, prevents the limiting part from becoming detached from the outer shell, and improves the integrity of the limiting structure.
[0014] Furthermore, both the limiting part and the outer shell are integrally injection molded from BMC material. BMC material has strong heat resistance, arc resistance, and mechanical properties. The integral injection molding of the limiting part and the outer shell from BMC material effectively improves the stability and insulation of the limiting structure.
[0015] A second aspect of this application is a capacitor comprising the limiting structure described above.
[0016] The beneficial effects of the above-mentioned capacitor are as follows: by setting the outer shell and limiting part, the capacitor core can be stably fixed in the cavity, avoiding displacement of the capacitor core during resin potting, and improving the positioning accuracy and structural stability of the internal parts of the capacitor; by setting the connecting part and contact part, the limiting part can fit the capacitor core through the contact part, so that the capacitor core can be accurately fixed in the cavity, improving the production efficiency and yield of the capacitor; by setting the contact surface, it is convenient for the contact part to stably apply pressure to the capacitor core, improving the production efficiency of the capacitor.
[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of a limiting structure according to an embodiment of the present utility model;
[0019] Figure 2 This is a top view of a limiting structure according to an embodiment of the present utility model;
[0020] Figure 3 This is a cross-sectional view of a limiting structure according to an embodiment of the present utility model. Detailed Implementation
[0021] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0022] Reference Figures 1 to 3 This utility model embodiment provides a limiting structure applied to a capacitor core 300 and a housing 100, including: a limiting part 200; the housing 100 has a cavity 110 for accommodating the capacitor core 300; the limiting part 200 includes a connecting part 210 and a contact part 220; the connecting part 210 is fixed to the inner wall of the cavity 110; the contact part 220 is fixedly connected to the housing 100 through the connecting part 210; the connecting part 210 is located above the capacitor core 300, and the contact part 220 is in contact with the capacitor core 300.
[0023] By providing the outer shell 100 and the limiting part 200, the capacitor core 300 can be stably fixed in the cavity 110, preventing displacement of the capacitor core 300 during resin potting and improving the positioning accuracy and structural stability of the limiting structure. By providing the connecting part 210 and the contact part 220, the limiting part 200 can fit the capacitor core 300 through the contact part 220, so that the capacitor core 300 can be accurately fixed in the cavity 110, improving the production efficiency and yield of the capacitor.
[0024] In another embodiment, there are four connecting portions 210, which are evenly distributed on both sides of the cavity 110. This structure ensures that the connecting portions 210 can stably and evenly apply pressure to the capacitor core 300, preventing displacement of the capacitor core 300 during resin potting and improving the positioning accuracy of the limiting structure.
[0025] In another embodiment, the cross-sectional area of the connecting portion 210 gradually decreases along the direction close to the capacitor core 300. This structure ensures that the connecting portion 210 can be stably fixed to the inner wall of the cavity 110, preventing the connecting portion 210 from loosening during use and improving the stability of the limiting structure.
[0026] In another embodiment, the lower end of the contact portion 220 is provided with a contact surface 221 that mates with the capacitor core 300. By providing the contact surface 221, the contact portion 220 can stably apply pressure to the capacitor core 300, thereby improving the production efficiency of the capacitor.
[0027] In another embodiment, the contact surface 221 is arc-shaped. This structure effectively increases the contact area between the contact portion 220 and the capacitor core 300, preventing collisions between the contact portion 220 and the capacitor core 300 during contact, thus avoiding damage to the capacitor core 300 and improving the production efficiency and yield of the capacitor.
[0028] In another embodiment, terminals 310 are also connected to the two poles of the capacitor core 300, and the terminals 310 are fixed to the inner wall of the cavity 110. By providing terminals 310, it is convenient for the limiting structure to lead outwards to the capacitor core 300, thereby improving the ease of use of the limiting structure.
[0029] In another embodiment, the inner wall surface of the cavity 110 where the terminal 310 is located is perpendicular to the inner wall surface of the cavity 110 where the connecting part 210 is located. This structure avoids the terminal 310 and the connecting part 210 being on the same plane, which would affect the stability of the capacitor core 300 during the resin potting process and ensure the production efficiency of the capacitor.
[0030] In another embodiment, the limiting part 200 is integrally formed with the outer shell 100. The integral forming of the limiting part 200 and the outer shell 100 effectively ensures the stability of the limiting structure, avoids the limiting part 200 from the outer shell 100 from becoming loose, and improves the integrity of the limiting structure.
[0031] In another embodiment, both the limiting part 200 and the outer shell 100 are integrally injection molded from BMC material. BMC material has strong heat resistance, arc resistance and mechanical properties. The integral injection molding of both the limiting part 200 and the outer shell 100 from BMC material effectively improves the stability and insulation of the limiting structure.
[0032] This application also provides a capacitor, including the limiting structure described above.
[0033] By providing the outer shell 100 and the limiting part 200, the capacitor core 300 can be stably fixed in the cavity 110, preventing displacement of the capacitor core 300 during resin potting and improving the positioning accuracy and structural stability of the limiting structure. By providing the connecting part 210 and the contact part 220, the limiting part 200 can fit against the capacitor core 300 through the contact part 220, so that the capacitor core 300 can be accurately fixed in the cavity 110, improving the production efficiency and yield of the capacitor. By providing the contact surface 221, the contact part 220 can stably apply pressure to the capacitor core 300, improving the production efficiency of the capacitor.
[0034] The working principle of this utility model will be further explained below.
[0035] In the capacitor manufacturing process of this embodiment, firstly, a shell 100 of corresponding size is selected according to the specifications of the capacitor core 300. The height of the limiting part 200 is set according to the size of the capacitor core 300 and the parameter requirements of the capacitor, so that when the upper end of the capacitor core 300 is attached to the contact part 220, the capacitor core 300 is at a suitable height within the cavity 110. Then, terminals 310 are welded to the two poles of the capacitor core 300. Next, the capacitor core 300 is placed in the cavity 110. Since the cross-sectional area of the connecting part 210 gradually decreases along the direction close to the capacitor core 300, and both the limiting part 200 and the shell 100 are integrally injection molded from BMC material, the limiting part 200 has a certain degree of toughness. The capacitor core is placed and pressed on the limiting part 200. The capacitor core 300 is fixed below the limiting part 200. Then, the outer shell 100 is placed into the resin potting equipment, and liquid resin is injected into the cavity 110. Under the action of the liquid resin, the capacitor core 300 is buoyed and moves upward until the upper end of the capacitor core 300 is in contact with the contact surface 221. Since the terminal 310 and the connecting part 210 are not on the same plane, the stability of the capacitor core 300 during the resin potting process is improved, ensuring the production efficiency of the capacitor. After the resin potting operation of the outer shell 100 is completed, the capacitor core 300 is at a preset height in the cavity 110 under the action of the limiting part 200, and waits for the resin to harden, achieving the effect of precisely controlling the position of the capacitor core 300, ensuring the production efficiency and yield of the capacitor.
[0036] As can be seen from the above description, the limiting structure and capacitor of this utility model, by setting the outer shell 100 and the limiting part 200, can stably fix the capacitor core 300 in the cavity 110, avoiding displacement of the capacitor core 300 during resin potting, and improving the positioning accuracy and structural stability of the limiting structure; by setting the connecting part 210 and the contact part 220, the limiting part 200 can fit the capacitor core 300 through the contact part 220, so that the capacitor core 300 can be accurately fixed in the cavity 110, improving the production efficiency and yield of the capacitor; by setting the contact surface 221, it is convenient for the contact part 220 to stably apply pressure to the capacitor core 300, improving the production efficiency of the capacitor.
[0037] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A limiting structure applied to a capacitor core and casing, characterized in that, include: The limiting part includes a cavity inside the outer shell for accommodating the capacitor core; the limiting part includes a connecting part and a contact part, and the connecting part is fixed to the inner wall of the cavity; The contact portion is fixedly connected to the outer casing via the connecting portion; the connecting portion is located above the capacitor core, and the contact portion is in contact with the capacitor core.
2. The limiting structure according to claim 1, characterized in that, The number of connecting parts is four, and the connecting parts are evenly distributed on both sides of the cavity.
3. The limiting structure according to claim 2, characterized in that, The cross-sectional area of the connection gradually decreases along the direction closer to the capacitor core.
4. The limiting structure according to claim 1, characterized in that, The lower end of the contact portion is provided with a contact surface that mates with the capacitor core.
5. A limiting structure according to claim 4, characterized in that, The contact surface is arc-shaped.
6. The limiting structure according to claim 1, characterized in that, The capacitor core is also connected to terminals on its two poles, and the terminals are fixed to the inner wall of the cavity.
7. A limiting structure according to claim 6, characterized in that, The inner wall surface of the cavity where the terminal is located is perpendicular to the inner wall surface of the cavity where the connecting part is located.
8. A limiting structure according to claim 1, characterized in that, The limiting part is integrally formed with the outer shell.
9. A limiting structure according to claim 8, characterized in that, Both the limiting part and the outer shell are integrally injection molded from BMC material.
10. A capacitor, characterized in that, Includes the limiting structure described in any one of claims 1-9 above.