Thin film type aluminum electrolytic capacitor

Abstract

The utility model relates to the technical field of capacitors, and discloses a film type aluminum electrolytic capacitor, which comprises an aluminum shell, a capacitor core arranged in the aluminum shell, and a sealing cover encapsulated at an opening of the aluminum shell, a plurality of positioning strips are fixedly connected to the inner wall of the aluminum shell, a gasket is placed at the inner bottom of the aluminum shell, an anode terminal and a cathode terminal are arranged on the two sides of the capacitor core respectively, an anode pin and a cathode pin are installed on the sealing cover in a penetrating mode, the anode terminal and the cathode terminal are connected to the anode pin and the cathode pin through foil guiding strips respectively, and the anode pin and the cathode pin are connected to the aluminum shell through foil guiding strips respectively. Heat conduction silicone grease is filled between the inner wall of the aluminum shell and the capacitor core, and a plurality of heat dissipation strips are fixedly connected to the side face of the aluminum shell. Through the arrangement of the positioning strips, a gap is formed between the capacitor core and the aluminum shell, deformation or welding point breakage is avoided, and the service life of the capacitor is prolonged; the heat conduction silicone grease can quickly transmit heat generated by the capacitor core to the aluminum shell and the heat dissipation strips, so that the heat dissipation performance of the capacitor is improved.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, specifically a thin-film aluminum electrolytic capacitor. Background Technology

[0002] Film-film aluminum electrolytic capacitors are a special type of capacitor that combines the characteristics of aluminum electrolytic capacitors and film capacitors. The working principle of film-film aluminum electrolytic capacitors is similar to other aluminum electrolytic capacitors. When a voltage is applied, a thin film of aluminum oxide forms on the surface of the aluminum foil; this film acts as the dielectric of the capacitor. Because the aluminum oxide film is very thin, the capacitor has a high capacitance per unit volume.

[0003] In existing thin-film aluminum electrolytic capacitors, the core is usually tightly fitted to the inner wall of the casing. The heat generated by the core during normal operation can cause the core to expand and deform, which can lead to deformation of the capacitor or breakage of the solder joints. Secondly, the heat dissipation of existing capacitors is not good and needs to be improved. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned technical defects and provide a thin-film aluminum electrolytic capacitor.

[0005] To solve the above problems, the technical solution of this utility model is: a thin-film aluminum electrolytic capacitor, including an aluminum shell, a capacitor core installed inside the aluminum shell, and a sealing cap filled at the opening of the aluminum shell;

[0006] Multiple positioning strips are fixed to the inner wall of the aluminum shell, and a gasket is placed at the bottom. Anode terminals and cathode terminals are respectively provided on both sides of the capacitor core. Anode pins and cathode pins are installed through the sealing cover. The anode terminals and cathode terminals are respectively connected to the anode pins and cathode pins through conductive foil strips. Thermal grease is filled between the inner wall of the aluminum shell and the capacitor core. Multiple heat dissipation strips are fixed to the side of the aluminum shell.

[0007] Furthermore, the capacitor core is fixed in the center of the aluminum casing by multiple positioning strips.

[0008] Furthermore, the positioning strip is a rubber strip.

[0009] Furthermore, the conductive foil strip is fixed to the anode / cathode pins via an aluminum washer.

[0010] Furthermore, the sealing cap is formed by potting epoxy resin material into the opening of the aluminum housing, and the aluminum housing, anode pin, and cathode pin are connected and fixed by the potted epoxy resin material.

[0011] The advantages of this invention compared to existing technologies are as follows: the positioning strip creates a gap between the capacitor core and the aluminum casing, preventing deformation or breakage of the solder joints and extending the lifespan of the capacitor; the thermal grease can quickly transfer the heat generated by the capacitor core to the aluminum casing and heat sink, improving the heat dissipation performance of the capacitor. Attached Figure Description

[0012] Figure 1 This is a perspective view of the present invention.

[0013] Figure 2 This is a cross-sectional view of the present invention.

[0014] Figure 3 This is a structural diagram of the aluminum casing of this utility model.

[0015] As shown in the figure: 1. Aluminum casing; 2. Capacitor core; 3. Sealing cover; 4. Positioning strip; 5. Gasket; 6. Anode terminal; 7. Cathode terminal; 8. Anode pin; 9. Cathode pin; 10. Conductive foil strip; 11. Thermal grease; 12. Heat sink; 13. Aluminum washer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1 to 3 As shown, a thin-film aluminum electrolytic capacitor includes an aluminum casing 1, a capacitor core 2 installed inside the aluminum casing 1, and a sealing cap 3 encapsulated at the opening of the aluminum casing 1.

[0018] Multiple positioning strips 4 are fixed to the inner wall of the aluminum shell 1, and a pad 5 is placed at the bottom. The capacitor core 2 is fixed in the center of the aluminum shell 1 by multiple positioning strips 4, and the positioning strips 4 are rubber strips.

[0019] The positioning strip 4 creates a gap between the capacitor core 2 and the aluminum shell 1. This gap helps to alleviate the mechanical stress caused by the expansion of the capacitor core 2 and the aluminum shell 11 due to the temperature rise during capacitor operation, thereby preventing deformation or breakage of the solder joint and extending the service life of the capacitor.

[0020] The capacitor core 2 has an anode terminal 6 and a cathode terminal 7 on both sides respectively. An anode pin 8 and a cathode pin 9 are installed through the sealing cover 3. The anode terminal 6 and the cathode terminal 7 are connected to the anode pin 8 and the cathode pin 9 respectively through the guide foil strip 10. The guide foil strip 10 is connected and fixed to the anode pin 8 / cathode pin 9 through the aluminum washer 13.

[0021] Thermal grease 11 is filled between the inner wall of the aluminum casing 1 and the capacitor core 2, and multiple heat sink strips 12 are fixed to the side of the aluminum casing 1.

[0022] The sealing cap 3 is formed by potting epoxy resin material into the opening of the aluminum housing 1. The aluminum housing 1, the anode pin 8 and the cathode pin 9 are connected and fixed by the potted epoxy resin material.

[0023] The aluminum washer 13 connects and fixes the conductive foil strip 10 to the anode pin 8 / cathode pin 9, improving the stability of the connection. The thermal grease 11 can quickly transfer the heat generated by the capacitor core 2 to the aluminum shell 1 and the heat sink, improving the heat dissipation performance of the capacitor.

[0024] In practical use, the positioning strip 4 creates a gap between the capacitor core 2 and the aluminum shell 1, preventing deformation or breakage of the solder joints and extending the lifespan of the capacitor. The thermal grease 11 can quickly transfer the heat generated by the capacitor core 2 to the aluminum shell 1 and the heat sink 12, improving the heat dissipation performance of the capacitor.

[0025] The parts not disclosed in this utility model are all prior art, and their specific structures and working principles will not be described in detail.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A thin-film aluminum electrolytic capacitor, comprising an aluminum casing (1), a capacitor core (2) installed inside the aluminum casing (1), and a sealing cap (3) encapsulated at the opening of the aluminum casing (1), characterized in that: Multiple positioning strips (4) are fixed to the inner wall of the aluminum shell (1), and a gasket (5) is placed at the bottom. Anode terminals (6) and cathode terminals (7) are respectively provided on both sides of the capacitor core (2). Anode pins (8) and cathode pins (9) are installed through the sealing cover (3). The anode terminals (6) and cathode terminals (7) are respectively connected to the anode pins (8) and cathode pins (9) through the guide foil strips (10). Thermal grease (11) is filled between the inner wall of the aluminum shell (1) and the capacitor core (2). Multiple heat dissipation strips (12) are fixed to the side of the aluminum shell (1).

2. A thin film aluminum electrolytic capacitor as defined in claim 1, wherein: The capacitor core (2) is fixed in the center of the aluminum shell (1) by multiple positioning strips (4).

3. A thin film aluminum electrolytic capacitor as defined in claim 2, wherein: The positioning strip (4) is a rubber strip.

4. A thin-film aluminum electrolytic capacitor according to claim 1, characterized in that: The guide foil strip (10) is connected and fixed to the anode pin (8) / cathode pin (9) by an aluminum washer (13).

5. A thin-film aluminum electrolytic capacitor according to claim 1, characterized in that: The sealing cap (3) is formed by potting epoxy resin material at the opening of the aluminum housing (1), and the aluminum housing (1), anode pin (8) and cathode pin (9) are connected and fixed by the potted epoxy resin material.

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