Capacitors
By designing a capacitor shell made of conductive materials and setting up a capacitor cavity and lead connection inside it, the capacitor shell is directly used as an electrode to dissipate heat by using a large surface area, which solves the problem of poor heat dissipation ability of the capacitor under high-frequency and high current conditions, and achieves the uniform distribution of current and the improvement of heat dissipation performance.
Patent Information
- Application Number
- CN202420657154.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-04-01
AI Technical Summary
In the case of high-frequency and high current conditions, existing capacitors have poor current carrying capacity and heat dissipation capacity due to the limited size of the capacitors, resulting in a sharp rise in temperature, affecting performance and even causing burning failure.
By designing the capacitor shell as a conductive material and setting a capacitor cavity inside it, the capacitor core and the shell are evenly connected through multiple leads, and the capacitor shell is directly used as an electrode to dissipate heat using a larger surface area.
It realizes the uniform current distribution and heat dissipation performance of the capacitor, improves the conductive performance of the product, making it more efficient and safe to apply under special operating conditions.
Smart Images
Figure CN222749340U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor with a shell as an electrode and improved heat dissipation performance. Background Art
[0002] As a basic component, capacitors are widely used in power electronic equipment.
[0003] When the capacitor is small in size and used in high-frequency and high-current conditions, due to the limitation of the size of the capacitor itself, the conventional capacitor design will have poor current carrying capacity and heat dissipation capacity. If there is not enough heat conduction environment outside the capacitor, the capacitor will have serious heating, causing its temperature to rise sharply, seriously affecting the performance of the capacitor, and even directly causing the capacitor to burn out and fail, resulting in safety accidents. Utility Model Content
[0004] The utility model aims to provide a capacitor to solve the problems existing in the prior art. By optimizing the structural design, the outer shell of the capacitor is directly used as an electrode, thereby improving the conductivity and heat dissipation performance.
[0005] In order to achieve the above purpose, the solution of the utility model is:
[0006] A capacitor comprises a capacitor shell, a capacitor core, leads, a filler, an extraction electrode and a first insulating member; the capacitor shell is made of a conductive material and is provided with a cavity; the capacitor core is arranged in the cavity, and a plurality of leads are evenly connected around the capacitor core, and the leads are connected to the inner wall of the cavity; the filler is encapsulated in the cavity; the extraction electrode is buried in the filler, one end of the extraction electrode is connected to the capacitor core, and the other end of the extraction electrode is exposed from the filler; the first insulating member is coated on the circumference of the extraction electrode to achieve insulation isolation between the extraction electrode and the capacitor shell.
[0007] The capacitor inner core and the lead wire, the lead wire and the capacitor shell, and the lead-out electrode and the capacitor inner core are fixedly connected by welding process.
[0008] The filler is epoxy resin.
[0009] The first insulating member is made of plastic.
[0010] The inner wall of the cavity is provided with positioning grooves matching the number of the lead wires, and the ends of the lead wires are fitted in the positioning grooves.
[0011] The capacitor also includes a second insulating member; the cavity has an upper opening and a sealed bottom; the second insulating member is located at the bottom of the cavity, and the capacitor core is located above the second insulating member.
[0012] Alternatively, the cavity has two upper and lower openings; the lead-out electrode is located at the upper opening of the cavity, and sealing rings are provided between the lead-out electrode and the first insulating member, and between the first insulating member and the upper opening of the cavity.
[0013] After adopting the above technical solution, the utility model has the following technical effects:
[0014] The capacitor shell of the utility model is made of conductive material, and the capacitor core inside the capacitor is evenly connected to the capacitor shell through multiple leads, so that the current of the capacitor can be evenly distributed, and the capacitor shell is directly used as an electrode, and the large surface area of the capacitor shell can be used for heat dissipation, which ultimately improves the conductivity and heat dissipation performance of the product, making the application of the capacitor more efficient and safer under some special working conditions. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional diagram of the first embodiment of the utility model;
[0016] Figure 2 This is an exploded view of the first embodiment of the utility model;
[0017] Figure 3 It is a cross-sectional view of the first embodiment of the utility model;
[0018] Figure 4 It is a perspective view of the second embodiment of the utility model;
[0019] Figure 5 The second embodiment of the utility model is decomposed Figure 1 ;
[0020] Figure 6 The second embodiment of the utility model is decomposed Figure 2 ;
[0021] Figure 7 It is a cross-sectional view of the second embodiment of the utility model;
[0022] Description of Figure Numbers:
[0023] 1-capacitor housing; 11-container cavity; 12-positioning groove; 2-capacitor core; 3-lead wire; 4-filler; 5-lead electrode; 6-first insulating member; 7-second insulating member; 8-sealing ring. DETAILED DESCRIPTION
[0024] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.
[0025] refer to Figures 1 to 7 As shown, the utility model discloses a capacitor, comprising a capacitor housing 1, a capacitor core 2, a lead wire 3, a filler 4, a lead electrode 5 and a first insulating member 6;
[0026] The capacitor housing 1 is made of a conductive material and is provided with a cavity 11;
[0027] The capacitor core 2 is disposed in the cavity 11, and a plurality of leads 3 are evenly connected around the capacitor core 2, and the leads 3 are connected to the inner wall of the cavity 11;
[0028] The filler 4 is encapsulated in the cavity 11;
[0029] The lead electrode 5 is buried in the filler 4, one end of which is connected to the capacitor core 2, and the other end of the lead electrode 5 is exposed from the filler 4, so as to facilitate connection with external power and electrical equipment;
[0030] The first insulating member 6 is coated on the circumference of the lead-out electrode 5 to achieve insulation isolation between the lead-out electrode 5 and the capacitor housing 1 .
[0031] Through the above scheme, the capacitor housing 1 of the utility model is made of conductive material, and the capacitor core 2 inside it is evenly connected to the capacitor housing 1 through multiple leads 3, so that the current of the capacitor can be evenly distributed, and the capacitor housing 1 is directly used as an electrode, and the large surface area of the capacitor housing 1 can be used for heat dissipation, ultimately achieving the improvement of the product's conductivity and heat dissipation performance, making the application of capacitors more efficient and safer under some special working conditions.
[0032] In some embodiments of the present invention, the capacitor core 2 and the lead wire 3, the lead wire 3 and the capacitor housing 1, and the lead electrode 5 and the capacitor core 2 are fixedly connected by welding.
[0033] In some embodiments of the present invention, the welding positions of the lead wires 3 and the capacitor housing 1 are evenly distributed relative to the capacitor housing 1 , and the welding positions of the lead wires 3 and the capacitor core 2 are evenly distributed relative to the capacitor core 2 .
[0034] The filler 4 plays a role in moisture-proofing and insulation of the capacitor core 2 and is in a liquid or solid state. In some embodiments of the present invention, the filler 4 is epoxy resin.
[0035] In some embodiments of the present invention, the first insulating member 6 is made of plastic or other materials with insulating properties.
[0036] See also Figures 1 to 3 , which is the first embodiment of the utility model.
[0037] In the first embodiment, the capacitor housing 1 is square in shape, and the cavity 11 has an upper opening and a sealed bottom, so there is no problem of the filler leaking from the bottom of the cavity 11 when the filler 4 is potted.
[0038] In the first embodiment, a second insulating member 7 is further included. The second insulating member 7 is located at the bottom of the cavity 11 , and the capacitor core 2 is located above the second insulating member 7 to achieve insulation isolation between the capacitor core 2 and the capacitor housing 1 .
[0039] See also Figures 4 to 7 , which is the second embodiment of the utility model.
[0040] In the second embodiment, the capacitor housing 1 is cylindrical in shape, and the cavity 11 has two upper and lower openings; the lead-out electrode 5 is located at the upper opening of the cavity 11, and sealing rings 8 are provided between the lead-out electrode 5 and the first insulating member 6, and between the first insulating member 6 and the upper opening of the cavity 11, so as to prevent the filler 4 from leaking in the gap between the lead-out electrode 5, the first insulating member 6, and the capacitor housing 1 when encapsulating the filler 4.
[0041] In the second embodiment, the inner wall of the cavity 11 is provided with positioning grooves 12 matching the number of leads 3, and the ends of the leads 3 fit into the positioning grooves 12, which can limit the connection position between the leads 3 and the capacitor housing 1 and ensure uniform distribution and connection of the leads 3.
[0042] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.
Claims
1. A capacitor, characterized in that: It includes a capacitor shell, a capacitor core, a lead wire, a filler, a lead electrode and a first insulating member; The capacitor housing is made of a conductive material and is provided with a cavity; The capacitor core is arranged in the cavity, and a plurality of leads are evenly connected around the capacitor core, and the leads are connected to the inner wall of the cavity; The filler is encapsulated in the cavity; The lead electrode is buried in the filler, one end of which is connected to the capacitor core, and the other end of the lead electrode is exposed from the filler; The first insulating member is coated on the circumference of the lead-out electrode to achieve insulation isolation between the lead-out electrode and the capacitor housing.
2. The capacitor according to claim 1, wherein: The capacitor inner core and the lead wire, the lead wire and the capacitor shell, and the lead-out electrode and the capacitor inner core are fixedly connected by welding process.
3. The capacitor according to claim 1, wherein: The filler is epoxy resin.
4. The capacitor according to claim 1, wherein: The first insulating member is made of plastic.
5. The capacitor according to claim 1, wherein: The inner wall of the cavity is provided with positioning grooves matching the number of the lead wires, and the ends of the lead wires are fitted in the positioning grooves.
6. The capacitor according to any one of claims 1 to 5, characterized in that: It also includes a second insulating member; the cavity has an upper opening and a bottom seal; the second insulating member is located at the bottom of the cavity, and the capacitor core is located above the second insulating member.
7. The capacitor according to any one of claims 1 to 5, characterized in that: The cavity has two upper and lower openings; the lead-out electrode is located at the upper opening of the cavity, and sealing rings are provided between the lead-out electrode and the first insulating member, and between the first insulating member and the upper opening of the cavity.