Heat dissipation enhanced cylindrical capacitor
By filling the capacitor casing with graphene polymer composite filler and applying inner and outer graphene coatings, the problem of poor heat dissipation in capacitors is solved, achieving efficient heat dissipation and insulation, extending the capacitor's service life and reducing its weight.
Patent Information
- Application Number
- CN202520114951.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-01-17
AI Technical Summary
Existing capacitors have poor heat dissipation, which makes them prone to thermal aging at high temperatures, affecting their service life.
A graphene polymer composite filler is used to fill the inside of the capacitor shell, combined with inner and outer graphene coatings and an insulating layer to form a highly efficient heat dissipation structure, including an inner heat dissipation layer, an outer heat dissipation layer and an insulating layer. The high thermal conductivity and thinness of graphene are used to improve heat dissipation performance, and the annular groove and necking are used to achieve sealing and fixation.
It significantly improves the heat dissipation performance of capacitors, extends their service life, and achieves lightweight design and good insulation performance.
Smart Images
Figure CN223956452U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of capacitor, in particular to a heat dissipation enhanced cylindrical capacitor. BACKGROUND
[0002] The capacitor is commonly known as the capacitor, as the name implies, is a 'container of electricity', which is a device that stores electric charge. Capacitors are one of the electronic components used in electronic devices, and are widely used in direct current through the circuit, coupling, bypass, filtering, tuning loop, energy conversion, control, etc. To effectively transmit or convert electrical energy, improve its power factor, usually use capacitors.
[0003] With the rapid development of electronic information technology, the update speed of digital electronic products is getting faster and faster. The production and sales of consumer electronic products such as flat panel televisions (LCD and PDP), notebook computers, digital cameras and other products continue to grow, driving the growth of the capacitor industry.
[0004] In the prior art, the capacitor is composed of a shell and a capacitor core, wherein the capacitor core is placed in the shell, and the heat generated by the capacitor core during operation is dissipated through the terminal and the shell. However, the heat dissipation effect of the current capacitor is not good enough, and the capacitor is prone to thermal aging under high temperature for a long time, thereby seriously affecting the service life of the capacitor. CONTENT OF THE INVENTION
[0005] In order to improve the heat dissipation effect of the capacitor and prolong the service life of the capacitor, the present application provides a heat dissipation enhanced cylindrical capacitor.
[0006] The heat dissipation enhanced cylindrical capacitor provided by the present application adopts the following technical scheme:
[0007] A heat dissipation enhanced cylindrical capacitor, comprising:
[0008] A shell;
[0009] A capacitor core, the capacitor core is arranged in the shell, and a filling space is formed between the capacitor core and the inner wall of the shell;
[0010] A graphene high polymer composite filler body is arranged in the filling space.
[0011] Optionally, the shell is an aluminum shell in a cylindrical shape.
[0012] Optionally, the outer surface of the shell is provided with an insulating layer.
[0013] Optionally, the outer side of the insulating layer is provided with an outer heat dissipation layer, and the inner surface of the shell is provided with an inner heat dissipation layer.
[0014] Optionally, the outer heat dissipation layer is an outer graphene coating, and the inner heat dissipation layer is an inner graphene coating.
[0015] Optionally, the shell is provided with a cover plate, and the cover plate is provided with a through hole for the wiring terminal of the capacitor core to pass through.
[0016] Optionally, the two side plate surfaces of the cover plate are provided with end cap heat dissipation layers.
[0017] Optionally, the cover plate is a circular aluminum plate, the outer circumferential surface of the cover plate is provided with an annular groove, and the side wall of the shell is inwardly recessed to form a necked portion matched with the annular groove.
[0018] In summary, the present application has at least one of the following beneficial technical effects:
[0019] 1. By arranging the graphene polymer composite filler, on the one hand, the shell interior is filled for surface sealing and fixing of the capacitor core; on the other hand, the graphene polymer composite filler has a very high thermal conductivity, which can quickly conduct the heat generated by the capacitor core to the shell, thereby improving the heat dissipation performance of the capacitor, which is beneficial to prolong the service life of the capacitor. In addition, the graphene polymer composite filler has the characteristics of lightness and thinness, which not only ensures the heat dissipation effect, but also realizes the lightness of the capacitor.
[0020] 2. By arranging the insulating layer, the shell of the capacitor has good insulation performance; by arranging the inner heat dissipation layer and the outer heat dissipation layer, the heat in the shell can be quickly conducted to the outside, further improving the heat dissipation efficiency of the capacitor.
[0021] 3. By arranging the annular groove and the necked portion, the inwardly recessed necked portion can be embedded in the annular groove, thereby realizing the sealing and fixing of the cover plate and the shell, and ensuring the sealing performance of the capacitor. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a schematic diagram of the overall structure of a heat dissipation enhanced cylindrical capacitor according to an embodiment of the present application.
[0023] Figure 2 is a schematic diagram of the layer structure of the shell according to an embodiment of the present application.
[0024] Figure 3 is a schematic diagram of the layer structure of the cover plate according to an embodiment of the present application.
[0025] Figure 4 is a sectional view of the internal structure of the shell according to an embodiment of the present application.
[0026] Explanation of reference signs: 1, shell; 11, neck part; 2, cover plate; 21, through hole; 22, annular groove; 3, insulation layer; 4, outer heat dissipation layer; 5, inner heat dissipation layer; 6, end cover heat dissipation layer; 7, capacitor core; 71, terminal; 8, filling space; 9, graphene polymer composite filler body. DETAILED DESCRIPTION
[0027] The following will be described in detail below with reference to the accompanying drawings. Figures 1-4 The present application will be further described in detail.
[0028] Embodiment:
[0029] The embodiment of the present application discloses a heat dissipation enhanced cylindrical capacitor. Referring to Figure 1 A heat dissipation enhanced cylindrical capacitor comprises a shell 1 and a cover plate 2 for sealing the shell 1, wherein the shell 1 is an aluminum shell in a cylindrical shape, and the cover plate 2 is a circular aluminum plate.
[0030] Referring to Figure 2 In order to make the shell 1 of the capacitor have good insulation performance, an insulation layer 3 is coated on the outer surface of the shell 1. In the embodiment, the insulation layer 3 is an insulation oxide film.
[0031] Referring to Figures 2-3 In order to improve the heat dissipation performance of the capacitor, an outer heat dissipation layer 4 is coated on the outer side of the insulation layer 3, an inner heat dissipation layer 5 is coated on the inner surface of the shell 1, and an end cover heat dissipation layer 6 is arranged on the two side surfaces of the cover plate 2. Since graphene has excellent heat dissipation performance, the outer heat dissipation layer 4 is an outer graphene coating layer, and the inner heat dissipation layer 5 is an inner graphene coating layer. In the embodiment, the end cover heat dissipation layer 6 also adopts a graphene coating layer.
[0032] Referring to Figure 4 A capacitor core 7 is arranged in the shell 1, and a through hole 21 for the terminal 71 of the capacitor core 7 to pass through is arranged on the cover plate 2. In the embodiment, the through hole 21 is provided with two.
[0033] Referring to Figure 4 The filling space 8 is formed between the capacitor core 7 and the inner wall of the shell 1, and the filling space 8 is filled with a graphene polymer composite filler body 9. By filling the graphene polymer composite filler body 9 in the filling space 8, on the one hand, the inside of the shell 1 is filled and sealed, so as to seal and fix the capacitor core 7; on the other hand, the graphene polymer composite filler body 9 has a very high thermal conductivity, which can quickly conduct the heat generated by the capacitor core 7 to the shell 1, so as to improve the heat dissipation performance of the capacitor, and is beneficial to prolong the service life of the capacitor.
[0034] Referring to Figure 1 and Figure 4The outer circumferential surface of the cover plate 2 is provided with an annular groove 22, and the sidewall of the shell 1 is provided with a necked part 11 which is recessed inwardly by concave pressing and is matched with the annular groove 22. In this way, the necked part 11 is recessed inwardly and can be embedded in the annular groove 22 through the arrangement of the annular groove 22 and the necked part 11, so that the cover plate 2 and the shell 1 are fixed and sealed, and the sealing property of the capacitor is ensured.
[0035] The implementation principle of the heat dissipation enhanced cylindrical capacitor according to an embodiment of the present application is as follows: the present application is provided with the graphene high polymer composite filler body 9, which can fill and seal the inside of the shell 1, so as to seal and fix the capacitor core 7; on the other hand, the graphene high polymer composite filler body 9 has a very high thermal conductivity, which can quickly conduct the heat generated by the capacitor core 7 to the shell 1, so as to improve the heat dissipation performance of the capacitor and prolong the service life of the capacitor. In addition, the graphene high polymer composite filler body 9 has the characteristics of lightness and thinness, which can ensure the heat dissipation effect and also realize the lightness of the capacitor.
[0036] The present application is provided with the insulating layer 3, so that the shell 1 of the capacitor has good insulation performance; the inner graphene coating and the outer graphene coating are arranged, which is beneficial to quickly conduct the heat in the shell 1 to the outside, and further improve the heat dissipation efficiency of the capacitor.
[0037] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.
Claims
1. A heat dissipation enhanced cylindrical capacitor, characterized by, The application relates to a capacitor, which comprises the following parts: a shell (1); a capacitor core (7) arranged in the shell (1), and a filling space (8) formed between the capacitor core (7) and the inner wall of the shell (1); a graphene polymer composite filler body (9) arranged in the filling space (8).
2. The enhanced heat dissipation cylindrical capacitor of claim 1, wherein: The shell (1) is an aluminum shell in a cylindrical shape.
3. The enhanced heat dissipation cylindrical capacitor of claim 1, wherein: An insulating layer (3) is arranged on the outer surface of the shell (1).
4. The enhanced heat dissipation cylindrical capacitor of claim 3, wherein: An outer heat dissipation layer (4) is arranged on the outer side of the insulating layer (3), and an inner heat dissipation layer (5) is arranged on the inner surface of the shell (1).
5. The enhanced heat dissipation cylindrical capacitor of claim 4, wherein: The outer heat dissipation layer (4) is an outer graphene coating, and the inner heat dissipation layer (5) is an inner graphene coating.
6. The enhanced heat dissipation cylindrical capacitor of claim 1, wherein: A cover plate (2) is arranged on the shell (1), and the cover plate (2) is provided with a through hole (21) for the wire terminal (71) of the capacitor core (7) to pass through.
7. The enhanced heat dissipation cylindrical capacitor of claim 6, wherein: End cover heat dissipation layers (6) are arranged on the two side surfaces of the cover plate (2).
8. The enhanced heat dissipation cylindrical capacitor of claim 6, wherein: The cover plate (2) is a circular aluminum plate, an annular groove (22) is arranged on the outer circumferential surface of the cover plate (2), and a necked portion (11) matched with the annular groove (22) is formed on the side wall of the shell (1) by being inwardly recessed.