Hollow capacitor
Through the design of hollow capacitors, the use of heating wires and rapid sealing technology in a vacuum environment has solved the shortcomings of the resin potting process and achieved efficient production and high yield of capacitors.
Patent Information
- Application Number
- CN202422634494.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-10-29
AI Technical Summary
In the existing capacitor production process, the resin potting process has problems such as difficulty in controlling resin blending and bubble overflow, resulting in low production efficiency, low yield rate, and the need for large equipment and space, affecting the continuous production of capacitors.
The hollow capacitor design is adopted. By setting up the shell, conductive part and heating wire, the heating wire is heated in a vacuum environment to achieve rapid sealing. Combined with the positioning groove, through hole and support block structure, the stable installation and sealing of the capacitor core are ensured.
It improves the sealing and installation convenience of capacitors, improves production efficiency and yield rate, avoids the shortcomings of resin potting, and realizes continuous production of capacitors and reduces equipment footprint.
Smart Images
Figure CN223401478U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of capacitors, in particular to a hollow capacitor. Background Art
[0002] At present, most of the capacitors used in new energy vehicle inverters use a resin potting capacitor core process to improve the sealing of the capacitor core. The purpose is to prevent the core from absorbing moisture during long-term use, which may affect the deterioration of the capacitor's electrical characteristics. During the production process of existing capacitors, the capacitor core is often vacuumed and the core is sealed and assembled to achieve the moisture-proof and anti-humidity requirements of the product. However, the resin potting production method has problems such as the difficulty in controlling the resin blending and the overflow of resin bubbles. At the same time, since the resin takes time to harden and cool, the capacitor cannot be produced continuously, and large-scale hardening equipment and a large area of production site are required, which affects the production efficiency and yield of the capacitor. Utility Model Content
[0003] In order to solve the above problems, the purpose of the present invention is to provide a hollow capacitor to ensure the sealing between the shell and the capacitor core, improve the installation convenience of the hollow capacitor, and improve the production efficiency and yield rate of the capacitor.
[0004] The technical solution adopted by the utility model to solve the problem is:
[0005] A hollow capacitor comprises: a shell, a conductive part and a capacitor core, wherein the shell comprises an upper cover and a lower cover, and the lower cover is provided with a positioning groove; the conductive part comprises a terminal and a heating wire, and the heating wire is fixed in the positioning groove; the terminal is fixed to the lower cover, and the terminal is connected to the two poles of the capacitor core; the lower cover is provided with a through hole connected to the positioning groove, and the two ends of the heating wire extend into the through hole.
[0006] The above-mentioned hollow capacitor has at least the following beneficial effects: by providing an outer shell and a conductive part, the capacitor core can be quickly and stably sealed by inserting the upper cover into the positioning groove, thereby improving the sealing and installation convenience of the hollow capacitor; by providing a heating wire and a through hole, it is convenient to apply voltage to the heating wire through the through hole, so that the upper cover and the lower cover can be quickly and stably covered, thereby achieving the effect of sealing the outer shell in a vacuum environment, thereby improving the production efficiency and yield rate of the capacitor.
[0007] Furthermore, the positioning grooves are evenly distributed on the edge of the lower cover. This structure ensures that the upper cover can be stably inserted into the positioning grooves, increases the contact area between the upper cover and the lower cover, and ensures the sealing between the upper cover and the lower cover.
[0008] Furthermore, there are two through holes and two heating wires each; the through holes are located on either side of the lower cover; and the ends of the heating wire are fixed in the two through holes. By providing two through holes and two heating wires, an external power source can easily apply voltage to the heating wires, allowing the heating wires to quickly and stably heat the positioning slots, thereby improving capacitor production efficiency.
[0009] Furthermore, the heating wire is made of stainless steel. This facilitates control of the wire diameter, improves the rigidity of the heating wire, and facilitates assembly. The stainless steel heating wire effectively ensures the structural stability of the hollow capacitor and improves the production efficiency and yield rate of the hollow capacitor.
[0010] Furthermore, grooves are provided on both sides of the upper cover to fit the capacitor core. The grooves facilitate the stable fixation of the capacitor core within the upper cover, preventing displacement of the capacitor core during assembly and improving the structural stability of the hollow capacitor.
[0011] Furthermore, the cross-sectional area of the upper cover gradually decreases as it moves away from the lower cover. This structure allows the capacitor core to be stably and accurately snapped into place inside the upper cover, increasing the contact area between the upper and lower covers and ensuring a tight seal between them.
[0012] Furthermore, the lower end of the upper cover is provided with a convex strip that cooperates with the positioning groove. The convex strip ensures the connection stability between the upper cover and the lower cover, and avoids the formation of a gap between the upper cover and the lower cover, which affects the sealing of the hollow capacitor.
[0013] Furthermore, the lower cover is provided with a plurality of support blocks, between which the capacitor core is fixed. The provision of the support blocks facilitates the precise fixing of the capacitor core to the lower cover, preventing displacement of the capacitor core during assembly, and improving the production efficiency and yield rate of the capacitor.
[0014] Furthermore, the terminal is clamped between the capacitor core and the support block. This structure ensures the connection stability between the terminal and the capacitor core, avoids poor contact between the terminal and the capacitor core, and improves the structural stability and service life of the capacitor.
[0015] Furthermore, the terminal is provided with a notch that matches the support block. The notch ensures the connection stability between the terminal and the support block, prevents the terminal from being displaced or falling off, and ensures the structural stability and service life of the capacitor.
[0016] The beneficial effects of the above-mentioned hollow capacitor are: by providing an outer shell and a conductive part, the capacitor core can be quickly and stably sealed by inserting the upper cover into the positioning groove, thereby improving the sealing and installation convenience of the hollow capacitor; by providing a heating wire and a through hole, it is convenient to apply voltage to the heating wire through the through hole, so that the upper cover and the lower cover can be quickly and stably covered, achieving the effect of sealing the outer shell in a vacuum environment, thereby improving the production efficiency and yield of the capacitor; by providing two through holes and a heating wire, it is convenient to apply voltage to the heating wire from an external power supply, so that the heating wire can quickly and stably heat the positioning groove, thereby improving the production efficiency of the capacitor; by providing a convex strip, the connection stability between the upper cover and the lower cover is guaranteed, and gaps between the upper cover and the lower cover are avoided, which affects the sealing of the hollow capacitor; by providing a support block, the capacitor core can be accurately fixed on the lower cover, thereby avoiding displacement of the capacitor core during assembly, thereby improving the production efficiency and yield of the capacitor.
[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic structural diagram of a hollow capacitor according to an embodiment of the present utility model;
[0019] Figure 2 This is an exploded view of the structure of a hollow capacitor according to an embodiment of the present utility model;
[0020] Figure 3 This is a structural exploded view from another angle of a hollow capacitor according to an embodiment of the present invention;
[0021] Figure 4 This is a vertical cross-sectional view of a hollow capacitor according to an embodiment of the present utility model;
[0022] Figure 5 This is a bottom view of a hollow capacitor according to an embodiment of the present utility model. DETAILED DESCRIPTION
[0023] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.
[0024] Reference Figures 1 to 5The embodiment of the utility model provides a hollow capacitor, including: a shell 100, a conductive part 200 and a capacitor core 300, the shell 100 includes an upper cover 110 and a lower cover 120, and the lower cover 120 is provided with a positioning groove 121; the conductive part 200 includes a terminal 210 and a heating wire 220, and the heating wire 220 is fixed in the positioning groove 121; the terminal 210 is fixed on the lower cover 120, and the terminal 210 is connected to the two poles of the capacitor core 300; the lower cover 120 is provided with a through hole 122 connected to the positioning groove 121, and both ends of the heating wire 220 extend into the through hole 122.
[0025] By providing the outer shell 100 and the conductive part 200, the capacitor core 300 can be quickly and stably sealed by inserting the upper cover 110 into the positioning groove 121, thereby improving the sealing and installation convenience of the hollow capacitor; by providing the heating wire 220 and the through hole 122, it is convenient to apply voltage to the heating wire 220 through the through hole 122, so that the upper cover 110 and the lower cover 120 can be quickly and stably covered, thereby achieving the effect of sealing the outer shell 100 in a vacuum environment, thereby improving the production efficiency and yield rate of the capacitor.
[0026] In another embodiment, the positioning grooves 121 are evenly distributed on the edge of the lower cover 120. This structure ensures that the upper cover 110 can be stably inserted into the positioning grooves 121, increases the contact area between the upper cover 110 and the lower cover 120, and ensures the sealing between the upper cover 110 and the lower cover 120.
[0027] In another embodiment, there are two through holes 122 and two heating wires 220. The through holes 122 are located on both sides of the lower cover 120, and the ends of the heating wire 220 are fixed in the two through holes 122. The provision of two through holes 122 and heating wires 220 facilitates the application of voltage to the heating wires 220 from an external power source, allowing the heating wires 220 to quickly and stably heat the positioning grooves 121, thereby improving the production efficiency of the capacitor.
[0028] In another embodiment, the heating wire 220 is made of stainless steel. This facilitates control of the wire diameter of the heating wire 220, improves the rigidity of the heating wire 220, and facilitates assembly of the heating wire 220. The stainless steel heating wire 220 effectively ensures the structural stability of the hollow capacitor, improving the production efficiency and yield rate of the hollow capacitor.
[0029] In another embodiment, grooves 111 are provided on both sides of the upper cover 110 to mate with the capacitor core 300. The provision of grooves 111 facilitates the stable fixation of the capacitor core 300 within the upper cover 110, preventing displacement of the capacitor core 300 during assembly and improving the structural stability of the hollow capacitor.
[0030] In another embodiment, the cross-sectional area of the upper cover 110 gradually decreases as it moves away from the lower cover 120. This structure allows the capacitor core 300 to be stably and accurately snapped into place within the upper cover 110, increasing the contact area between the upper cover 110 and the lower cover 120 and ensuring a tight seal between the upper cover 110 and the lower cover 120.
[0031] In another embodiment, the lower end of the upper cover 110 is further provided with a ridge 112 that cooperates with the positioning groove 121. The provision of the ridge 112 ensures the connection stability between the upper cover 110 and the lower cover 120, and avoids the formation of a gap between the upper cover 110 and the lower cover 120, which would affect the sealing of the hollow capacitor.
[0032] In another embodiment, the lower cover 120 is further provided with a plurality of support blocks 123, and the capacitor core 300 is fixed between the support blocks 123. The provision of the support blocks 123 facilitates the precise fixing of the capacitor core 300 to the lower cover 120, prevents displacement of the capacitor core 300 during assembly, and improves the production efficiency and yield rate of the capacitor.
[0033] In another embodiment, the terminal 210 is clamped between the capacitor core 300 and the support block 123. This structure ensures the connection stability between the terminal 210 and the capacitor core 300, avoids poor contact between the terminal 210 and the capacitor core 300, and improves the structural stability and service life of the capacitor.
[0034] In another embodiment, the terminal 210 is provided with a notch 211 that cooperates with the support block 123. The notch 211 ensures the connection stability between the terminal 210 and the support block 123, prevents the terminal 210 from being displaced or falling off, and ensures the structural stability and service life of the capacitor.
[0035] The working principle of the present utility model is further described below.
[0036] In the production process of the hollow capacitor in this embodiment, first, according to the specifications of the capacitor core 300, the upper cover 110 and the lower cover 120 of corresponding sizes are selected, and the heating wire 220 is set in the positioning groove 121 on the lower cover 120, wherein the two ends of the heating wire 220 are respectively fixed in the two through holes 122; then, the capacitor core and the terminal 210 are set between the support block 123, and the terminal 210 is clamped between the capacitor core 300 and the support block 123; then, the terminal 210 is welded to the two poles of the capacitor core 300. Specifically, the terminal 210 and the capacitor core 300 are heated to 370°C by a welding gun, and the welding is completed within 3S; then, the lower cover 120 and the capacitor core 300 are placed in a vacuum tank and evacuated. The temperature reaches 1kPa, and the upper cover 110 is installed on the lower cover 120. At this time, the ridge 112 is inserted into the positioning groove 121 and fits the heating wire 220. Then, a pressure of 0.5MPa is applied to the upper cover 110. At the same time, the external welding electrode is connected to the two ends of the heating wire 220 through the through hole 122 and a DC voltage of 50V is applied for a duration of 3s. After the voltage is connected to the heating wire 220, it generates heat and heats the positioning groove 121 and the ridge 112. The positioning groove 121 and the ridge 112 are fused under heat and force, so that the upper cover 110 and the lower cover 120 are covered in a vacuum environment. The capacitor core 300 can stably fit the inner wall of the groove 111, and a vacuum environment cavity for accommodating the capacitor core 300 is formed in the upper cover 110. This completes the assembly of the hollow capacitor. The entire process is efficient and orderly. The upper cover 110 and the lower cover 120 ensure the sealing and structural strength of the hollow capacitor during the hot melt process, avoiding product defects caused by the use of resin potting technology. It also realizes the continuous production of hollow capacitors, reduces production equipment and space, and improves the production capacity of hollow capacitors.
[0037] From the above description, it can be seen that the hollow capacitor of the present invention can quickly and stably seal the capacitor core 300 by inserting the upper cover 110 into the positioning groove 121 by providing the shell 100 and the conductive part 200, thereby improving the sealing and installation convenience of the hollow capacitor; by providing the heating wire 220 and the through hole 122, it is convenient to apply voltage to the heating wire 220 through the through hole 122, so that the upper cover 110 and the lower cover 120 can be quickly and stably covered, achieving the effect of sealing the shell 100 in a vacuum environment, thereby improving the production efficiency and yield rate of the capacitor; by providing two through holes 122 and the heating wire 220, it is convenient to apply voltage to the heating wire 220 through the through hole 122, so that the upper cover 110 and the lower cover 120 can be quickly and stably covered, thereby achieving the effect of sealing the shell 100 in a vacuum environment, thereby improving the production efficiency and yield rate of the capacitor; The heating wire 220 facilitates an external power source to apply voltage to the heating wire 220, so that the heating wire 220 can quickly and stably heat the positioning groove 121, thereby improving the production efficiency of the capacitor; by providing the ridge 112, the connection stability between the upper cover 110 and the lower cover 120 is ensured, and gaps between the upper cover 110 and the lower cover 120 are avoided, which affects the sealing of the hollow capacitor; by providing the support block 123, the capacitor core 300 can be accurately fixed on the lower cover 120, thereby avoiding displacement of the capacitor core 300 during the assembly process, thereby improving the production efficiency and yield rate of the capacitor.
[0038] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention.
Claims
1. A hollow capacitor, characterized in that: include: The outer shell comprises an upper cover and a lower cover, and the lower cover is provided with a positioning groove; the conductive part comprises a terminal and a heating wire, and the heating wire is fixed in the positioning groove; the terminal is fixed on the lower cover, and the terminal is connected to the two poles of the capacitor core; the lower cover is provided with a through hole connected to the positioning groove, and the two ends of the heating wire extend into the through hole.
2. The hollow capacitor according to claim 1, characterized in that: The positioning grooves are evenly distributed on the edge of the lower cover.
3. The hollow capacitor according to claim 2, characterized in that: The number of the through holes and the number of the heating wires are both two; the through holes are located on both sides of the lower cover; and the two ends of the heating wire are respectively fixed in the two through holes.
4. The hollow capacitor according to claim 3, characterized in that: The heating wire is made of stainless steel.
5. The hollow capacitor according to claim 3, characterized in that: Grooves matching the capacitor core are provided on both sides of the upper cover.
6. The hollow capacitor according to claim 5, characterized in that: The cross-sectional area of the upper cover gradually decreases in a direction away from the lower cover.
7. The hollow capacitor according to claim 1, characterized in that: The lower end of the upper cover is further provided with a convex strip that cooperates with the positioning groove.
8. The hollow capacitor according to claim 1, characterized in that: The lower cover is further provided with a plurality of support blocks, and the capacitor core is fixed between the support blocks.
9. The hollow capacitor according to claim 8, characterized in that: The terminal is clamped between the capacitor core and the support block.
10. The hollow capacitor according to claim 9, characterized in that: The terminal is provided with a notch which matches the supporting block.