Anti-oxidation capacitor core and capacitor thereof

Abstract

The anti-oxidation capacitor core comprises a main body, a conductive part and a protection part, the conductive part comprises an upper electrode layer and a lower electrode layer, and the protection part comprises an upper protection layer and a lower protection layer; the upper protective layer is fixed at the upper end of the main body through the upper electrode layer; the lower protective layer is fixed at the lower end of the main body through the lower electrode layer; the upper electrode layer and the lower electrode layer are both made of metal powder, and the upper protective layer and the lower protective layer are both made of organic solderability preservative films. Through arranging the conductive part and the protection part, the upper protection layer effectively protects the upper electrode layer and the upper end of the main body, and the lower protection layer effectively protects the lower electrode layer and the lower end of the main body, thereby preventing the surface of the conductive part and the metal in the main body from being oxidized or vulcanized, improving the protection performance of the main body, and guaranteeing the performance of the capacitor core. And the service life of the capacitor core is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, and in particular to an antioxidant capacitor core and its capacitor. Background Technology

[0002] Film capacitors are capacitors constructed by overlapping metal foil as electrodes with thin films such as polyethylene, polypropylene, polystyrene, or polycarbonate at both ends and then winding them into a cylindrical shape. In the actual production process, the capacitor core is produced by winding the film and then spraying metal powder onto the electrodes at both ends to form large-area contact electrodes. However, because the electrodes are composed of metal powder, some voids will exist. Therefore, the storage conditions for the capacitor core need to be strictly controlled; otherwise, the capacitor core is prone to moisture absorption, leading to a decrease in insulation resistance and reducing the capacitor's performance. Furthermore, because the metal electrodes are prone to oxidation, it is not conducive to soldering the capacitor core, affecting the capacitor's production efficiency and yield. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to provide an antioxidant capacitor core and its capacitor, ensuring the antioxidant performance of the capacitor core, extending the service life of the capacitor core, 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, an antioxidant capacitor core is provided, comprising: a main body, a conductive portion, and a protective portion. The conductive portion includes an upper electrode layer and a lower electrode layer, and the protective portion includes an upper protective layer and a lower protective layer. The upper protective layer is fixed to the upper end of the main body via the upper electrode layer, and the lower protective layer is fixed to the lower end of the main body via the lower electrode layer. Both the upper electrode layer and the lower electrode layer are made of metal powder, and both the upper protective layer and the lower protective layer are made of organic solder resist film.

[0006] The aforementioned antioxidant capacitor core has at least the following beneficial effects: by setting conductive and protective parts, the upper protective layer effectively protects the upper electrode layer and the upper end of the main body, and the lower protective layer effectively protects the lower electrode layer and the lower end of the main body, preventing oxidation or sulfidation of the surface of the conductive part and the metal inside the main body, improving the protective performance of the main body, ensuring the performance of the capacitor core, and extending the service life of the capacitor core.

[0007] Furthermore, the thickness of the protective layer is less than the thickness of the conductive layer. This structure ensures that excessive thickness of the upper and lower protective layers does not affect the welding quality and efficiency between the conductive layer and external components, thus reducing the production efficiency of the capacitor.

[0008] Furthermore, the melting point of the protective portion is lower than that of the conductive portion. This structure ensures that the upper and lower protective layers melt rapidly during the welding process, and the main body can be electrically connected to external components through the conductive portion, thereby improving the production efficiency and yield of the capacitor.

[0009] Furthermore, the upper electrode layer covers the upper surface of the main body; the lower electrode layer covers the lower surface of the main body. This structure ensures that the conductive part can completely cover the upper and lower surfaces of the main body, preventing the upper and lower ends of the main body from being unable to quickly and stably connect to external components through the conductive part, thus affecting the installation efficiency of the anti-oxidation capacitor core.

[0010] Furthermore, the upper protective layer covers the upper surface of the upper electrode layer; the lower protective layer covers the lower surface of the lower electrode layer. This structure ensures that the protective portion can completely cover the upper and lower surfaces of the conductive portion, preventing the upper surface of the upper electrode layer and the lower surface of the lower electrode layer from oxidizing due to contact with air and other impurities during transportation and storage, thus improving the protective performance of the anti-oxidation capacitor core.

[0011] Furthermore, the cross-section of the main body is a rounded rectangle. This structure prevents damage to the anti-oxidation capacitor core during transportation or use, effectively ensuring the structural stability of the anti-oxidation capacitor core.

[0012] Furthermore, the conductive part is formed by spraying a zinc-copper alloy onto the main body. Zinc-copper alloy possesses excellent mechanical properties, corrosion resistance, and good electrical and thermal conductivity. Spraying the conductive part with a zinc-copper alloy effectively improves the protective and conductive properties of the anti-oxidation capacitor core.

[0013] Furthermore, the protective layer is made of benzotrichloride, alkylimidazolium, or alkylbenzylimidazolium. Benzotrichloride, alkylimidazolium, and alkylbenzylimidazolium have good stability and protective properties, and the resulting organic solderable protective layer can effectively protect the conductive parts from damage and improve the protective performance of the antioxidant capacitor core.

[0014] Furthermore, the thickness of the upper protective layer and the lower protective layer is between 0.2 and 0.5 μm. This structure ensures the structural stability of the anti-oxidation capacitor core and also avoids the excessive thickness of the protective layer from affecting the welding quality and efficiency of the conductive part and the external components.

[0015] In a second aspect of this application, a capacitor is provided, comprising a housing and an antioxidant capacitor core as described above; the housing is provided with terminals, which pass through the protective portion and are electrically connected to the conductive portion and the main body.

[0016] The beneficial effects of the above-mentioned capacitor are as follows: by setting conductive parts and protective parts, the upper protective layer effectively protects the upper electrode layer and the upper end of the main body, and the lower protective layer effectively protects the lower electrode layer and the lower end of the main body, preventing oxidation or sulfidation of the surface of the conductive parts and the internal metal of the main body, improving the protective performance of the main body, ensuring the performance of the capacitor core, and improving the convenience of transportation and storage of the capacitor core; by setting terminals and protective parts, during the welding process of terminals and the main body, the protective parts can be quickly removed by flux, exposing clean conductive parts and allowing the molten solder between the terminals and the main body to form a strong solder joint, thereby 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 the structure of an antioxidant capacitor core according to an embodiment of the present invention;

[0019] Figure 2 This is an exploded view of the structure of an antioxidant capacitor core according to an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view of an antioxidant capacitor core according to an embodiment of the present invention. 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 provides an antioxidant capacitor core, comprising: a main body 100, a conductive part 200, and a protective part 300. The conductive part 200 includes an upper electrode layer 210 and a lower electrode layer 220, and the protective part 300 includes an upper protective layer 310 and a lower protective layer 320. The upper protective layer 310 is fixed to the upper end of the main body 100 via the upper electrode layer 210, and the lower protective layer 320 is fixed to the lower end of the main body 100 via the lower electrode layer 220. Both the upper electrode layer 210 and the lower electrode layer 220 are made of metal powder, and both the upper protective layer 310 and the lower protective layer 320 are made of organic solder resist film.

[0023] By providing the conductive part 200 and the protective part 300, the upper protective layer 310 effectively protects the upper electrode layer 210 and the upper end of the main body 100, and the lower protective layer 320 effectively protects the lower electrode layer 220 and the lower end of the main body 100, preventing oxidation or sulfidation of the surface of the conductive part 200 and the internal metal of the main body 100, improving the protective performance of the main body 100, ensuring the performance of the capacitor core, and extending the service life of the capacitor core.

[0024] In another embodiment, the thickness of the protective portion 300 is less than the thickness of the conductive portion 200. This structure ensures that excessive thickness of the upper protective layer 310 and the lower protective layer 320 does not affect the welding quality and efficiency of the conductive portion 200 with external components, thus reducing the production efficiency of the capacitor.

[0025] In another embodiment, the melting point of the protective portion 300 is lower than that of the conductive portion 200. This structure ensures that the upper protective layer 310 and the lower protective layer 320 melt rapidly during the welding process, and the main body 100 can be electrically connected to external components through the conductive portion 200, thereby improving the production efficiency and yield of the capacitor.

[0026] In another embodiment, the upper electrode layer 210 covers the upper surface of the main body 100, and the lower electrode layer 220 covers the lower surface of the main body 100. This structure ensures that the conductive part 200 can completely cover the upper and lower surfaces of the main body 100, preventing the upper and lower ends of the main body 100 from being unable to quickly and stably connect to external components through the conductive part 200, thus affecting the installation efficiency of the anti-oxidation capacitor core.

[0027] In another embodiment, the upper protective layer 310 covers the upper surface of the upper electrode layer 210; the lower protective layer 320 covers the lower surface of the lower electrode layer 220. This structure ensures that the protective portion 300 can completely cover the upper and lower surfaces of the conductive portion 200, preventing the upper surface of the upper electrode layer 210 and the lower surface of the lower electrode layer 220 from oxidizing due to contact with air and other impurities during transportation and storage, thereby improving the protective performance of the anti-oxidation capacitor core.

[0028] In another embodiment, the cross-section of the main body 100 is a rounded rectangle. This structure of the main body 100 can prevent damage to the anti-oxidation capacitor core during transportation or use, effectively ensuring the structural stability of the anti-oxidation capacitor core.

[0029] In another embodiment, the conductive part 200 is formed by spraying a zinc-copper alloy onto the main body 100. Zinc-copper alloy has excellent mechanical properties, corrosion resistance, and good electrical and thermal conductivity. Forming the conductive part 200 with a zinc-copper alloy effectively improves the protective and conductive properties of the anti-oxidation capacitor core.

[0030] In another embodiment, the protective part 300 is made of benzotrichloride, alkylimidazolium, or alkylbenzylimidazolium. Benzotrichloride, alkylimidazolium, and alkylbenzylimidazolium have good stability and protective properties, and the resulting organic solderable protective layer can effectively protect the conductive part 200 from damage and improve the protective performance of the antioxidant capacitor core.

[0031] In another embodiment, the thicknesses of the upper protective layer 310 and the lower protective layer 320 are between 0.2 and 0.5 μm. This structure ensures the structural stability of the anti-oxidation capacitor core and also avoids the excessive thickness of the protective part 300 from affecting the welding quality and efficiency of the conductive part 200 and the external components.

[0032] This application embodiment also provides a capacitor, including a housing and an antioxidant capacitor core as described above; the housing is provided with terminals, which pass through the protective part 300 and are electrically connected to the conductive part 200 and the main body 100.

[0033] The working principle of this utility model will be further explained below.

[0034] In the production process of the antioxidant capacitor core in this embodiment, firstly, according to the specifications of the main body 100, a film of the corresponding size is selected, and the main body 100 is formed by winding the film; then, copper-zinc alloy is sprayed on the upper and lower ends of the main body 100 to form conductive parts 200, that is, the electrodes of the main body 100. Among them, copper-zinc alloy is a copper-based alloy whose main components are copper and zinc. The zinc content is generally between 5% and 45%. Copper-zinc alloy has good mechanical properties, corrosion resistance, and machinability, as well as good electrical and thermal conductivity, effectively improving the protective and conductive properties of the main body 100. Then, the main body 100 and the conductive part 200 are tested. After passing the test, a water-soluble operation is performed on the upper surface of the upper electrode layer 210 and the lower surface of the lower electrode layer 220 to form the upper protective layer 310 and the lower protective layer 320. The specific process is as follows: the upper surface of the upper electrode layer 210 and the lower surface of the lower electrode layer 220 are washed with water, pre-immersed, and dried, and then an organic solderable protective layer is plated. Then, drying, washing with water, blowing dry, baking dry, and packaging are carried out. During the coating process, the temperature can be controlled below 80°C to avoid damage to the conductive part 200 and the protective part 300. This completes the production of the anti-oxidation capacitor core. Since the protective part 300 covers the conductive part 200, it can effectively prevent the electrodes of the main body 100 from contacting the air and oxidizing, improve the convenience of storage and transportation of the anti-oxidation capacitor core, and also extend the service life of the anti-oxidation capacitor core.

[0035] During the assembly of the capacitor, the terminals need to be soldered to the two electrodes of the main body 100 and fixedly installed inside the casing. During the high-temperature soldering process, the protective part 300 can be quickly removed by the flux, exposing the clean and unoxidized conductive part 200, so that the conductive part 200 and the terminal can be bonded to form a strong solder joint in a very short time through molten solder. This avoids poor contact between the main body 100 and the terminal or the solder joint falling off, thereby improving the operational stability and service life of the capacitor.

[0036] As can be seen from the above description, the antioxidant capacitor core and capacitor of this utility model, by setting a conductive part 200 and a protective part 300, the upper protective layer 310 effectively protects the upper electrode layer 210 and the upper end of the main body 100, and the lower protective layer 320 effectively protects the lower electrode layer 220 and the lower end of the main body 100, preventing oxidation or sulfidation of the surface of the conductive part 200 and the internal metal of the main body 100, improving the protective performance of the main body 100, ensuring the performance of the capacitor core, and improving the convenience of transportation and storage of the capacitor core; by setting terminals and protective parts 300, during the welding process of terminals and main body 100, the protective parts 300 can be quickly removed by flux, exposing the clean conductive part 200 and making the molten solder between the terminals and main body 100 bond into a strong solder joint, improving the production efficiency and yield 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. An antioxidant capacitor core, characterized in that, include: The device comprises a main body, a conductive part, and a protective part. The conductive part includes an upper electrode layer and a lower electrode layer, and the protective part includes an upper protective layer and a lower protective layer. The upper protective layer is fixed to the upper end of the main body via the upper electrode layer, and the lower protective layer is fixed to the lower end of the main body via the lower electrode layer. Both the upper electrode layer and the lower electrode layer are made of metal powder, and both the upper protective layer and the lower protective layer are made of organic solder resist film.

2. The antioxidant capacitor core according to claim 1, characterized in that, The thickness of the protective part is less than the thickness of the conductive part.

3. The antioxidant capacitor core according to claim 2, characterized in that, The melting point of the protective part is lower than that of the conductive part.

4. The antioxidant capacitor core according to claim 1, characterized in that, The upper electrode layer covers the upper surface of the main body; the lower electrode layer covers the lower surface of the main body.

5. An antioxidant capacitor core according to claim 4, characterized in that, The upper protective layer covers the upper surface of the upper electrode layer; the lower protective layer covers the lower surface of the lower electrode layer.

6. The antioxidant capacitor core according to claim 1, characterized in that, The cross-section of the main body is a rounded rectangle.

7. The antioxidant capacitor core according to claim 1, characterized in that, The conductive part is formed by spraying a zinc-copper alloy onto the main body.

8. The antioxidant capacitor core according to claim 1, characterized in that, The protective part is made of benzotrichloroazole, alkylimidazolium, or alkylbenzylimidazolium.

9. An antioxidant capacitor core according to claim 8, characterized in that, The thickness of the upper protective layer and the lower protective layer is between 0.2 and 0.5 μm.

10. A capacitor, characterized in that, It includes a housing and an antioxidant capacitor core as described in any one of claims 1-9; the housing is provided with terminals, which pass through the protective portion and are electrically connected to the conductive portion and the main body.

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