High-temperature-resistant and pressure-resistant aluminum electrolytic capacitor

Abstract

The utility model relates to the technical field of aluminum electrolytic capacitors, and discloses a high-temperature-resistant and pressure-resistant aluminum electrolytic capacitor, which comprises an aluminum electrolytic capacitor, a rubber sealing plug is fixedly connected to the bottom end of the aluminum electrolytic capacitor, and a cathode lead is fixedly connected to the inside of the rubber sealing plug. The interior of the rubber sealing plug is fixedly connected with a positive electrode lead; the interior of the aluminum electrolytic capacitor is fixedly connected with an aluminum housing. According to the utility model, the equipment body is developed in the high-voltage electrolyte, and a novel waterproof additive is added in the electrolyte, so that the generation of esterification water is effectively inhibited, the bottom of the product is prevented from bulging when the product is subjected to reflow soldering, the impregnation process is changed, the onboard impregnation technology is researched, and the exposure time of a moist core package in air is shortened; and the butyl rubber with the hardness of more than or equal to 88 degrees is selected, so that rubber particles are not deformed when the product is subjected to reflow soldering, and other series of products are improved and widened.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum electrolytic capacitors, in particular to a high-temperature resistant and pressure-resistant aluminum electrolytic capacitor. Background Art

[0002] The CDVS chip environmental protection type 130 °C high-temperature resistant aluminum electrolytic capacitor (specially used for LED lamps) of this project is mainly used in energy-saving lamps and LED semiconductor lighting devices. It is a key component necessary for lighting devices. As long as energy-saving lamps and LED semiconductors are manufactured, aluminum electrolytic capacitors exist, and upgrades and replacements must be carried out synchronously. This product is suitable for extra-long service life, with the power factor reaching the international level, can withstand the ripple current of different lighting power equipment, and the harmful substances in the product fully meet the standards of European Union countries and other countries.

[0003] Comparative publication number 202221652797.X, a high-temperature resistant and pressure-resistant aluminum electrolytic capacitor, includes a base, an aluminum electrolytic capacitor body, a limiting plate, a pressing cover and a pad; the base is horizontally arranged, and pads are symmetrically welded on the left and right sides of its lower surface; on the upper surface of the base, limiting plates are vertically symmetrically arranged on the left and right sides. Each limiting plate is an arc-shaped plate matching the aluminum electrolytic capacitor body and is made of a heat dissipation material; the aluminum electrolytic capacitor body is vertically placed in the middle position of the upper surface of the base and is fixedly surrounded by two limiting plates; at the bottom of the aluminum electrolytic capacitor body, two lead-out wires are provided, and each lead-out wire extends vertically downward out of the lower surface of the base and is respectively welded to the corresponding pad; at the top of the two limiting plates, a pressing cover is coaxially clamped, and the aluminum electrolytic capacitor body is vertically limited by the pressing cover. By setting heat dissipation fins, the heat in the aluminum electrolytic capacitor body can be dissipated, thereby improving the high-temperature resistance strength. By setting the first spring, the aluminum electrolytic capacitor body can be better fixed in the limiting plate, thereby playing a protective role and preventing the aluminum electrolytic capacitor body from being damaged. By setting pads, welding connection can be carried out with the corresponding pads on the PCB board, thereby improving the stability.

[0004] For this high-temperature resistant and pressure-resistant aluminum electrolytic capacitor, by setting the first spring, the aluminum electrolytic capacitor body can be better fixed in the limiting plate, thereby playing a protective role and preventing the aluminum electrolytic capacitor body from being damaged. By setting pads, welding connection can be carried out with the corresponding pads on the PCB board, thereby improving the stability. However, no waterproof additive is added to the electrolyte in the device body, which affects the product from bulging at the bottom during reflow soldering and affects the overall service life of the device. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides a high-temperature resistant and pressure-resistant aluminum electrolytic capacitor.

[0006] The present utility model is implemented by the following technical solutions: A high-temperature and high-pressure resistant aluminum electrolytic capacitor, including an aluminum electrolytic capacitor, a rubber sealing plug is fixedly connected to the bottom end of the aluminum electrolytic capacitor, a negative lead is fixedly connected inside the rubber sealing plug, and a positive lead is fixedly connected inside the rubber sealing plug;

[0007] An aluminum shell is fixedly connected inside the aluminum electrolytic capacitor, a core package is fixedly connected inside the aluminum shell, a tape is adhered to the surface of the core package, a negative lead is fixedly connected to the bottom end of the core package, a positive lead is fixedly connected to the bottom end of the core package, a lead-out bar is fixedly connected inside the core package, an insulating paper is fixedly connected inside the core package, and a cathode foil is fixedly connected inside the lead-out bar.

[0008] Through the above technical solutions, the insulating paper plays an isolating and insulating role between the anode and cathode aluminum foils of the electrolytic capacitor. The better the quality, the more it can meet the requirements of the capacitor for high voltage resistance, low impedance, and low loss.

[0009] As a further improvement of the above solution, the negative lead is fixedly connected inside the aluminum electrolytic capacitor, the positive lead is fixedly connected inside the aluminum electrolytic capacitor, and a negative lead is fixedly connected inside the aluminum shell.

[0010] As a further improvement of the above solution, a positive lead is fixedly connected inside the aluminum shell, a core package is arranged at the top end of the rubber sealing plug, and a tape is fixedly connected inside the aluminum electrolytic capacitor.

[0011] As a further improvement of the above solution, the core package is fixedly connected inside the aluminum electrolytic capacitor, and the lead-out bars are symmetrically distributed with the core package as the center.

[0012] Through the above technical solutions, the lead-out bar structure is compact, and the electrolytic capacitors can be connected in series to form a rolled and sealed structure, greatly reducing the volume and also reducing the space occupancy rate of the device.

[0013] As a further improvement of the above solution, the lead-out bar is fixedly connected inside the aluminum electrolytic capacitor, and the insulating paper is fixedly connected inside the aluminum electrolytic capacitor.

[0014] As a further improvement of the above solution, the cathode foil is fixedly connected inside the aluminum electrolytic capacitor, the negative lead is fixedly connected inside the core package, and the positive lead is fixedly connected inside the core package.

[0015] As a further improvement of the above solution, the insulating paper is fixedly connected inside the aluminum shell, the cathode foil is fixedly connected inside the aluminum shell, and the lead-out bar is fixedly connected inside the aluminum shell.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model arranges the equipment body in the research and development of high-voltage electrolyte, adds a new waterproof additive into the electrolyte, thereby effectively inhibiting the generation of esterified water, ensuring that the product does not bulge when the product is reflow soldering, changes the impregnation process, studies the on-machine impregnation technology, shortens the time that the tide core package is exposed to the air, reduces the water in the electrolyte, ensures that the product does not bulge when the product is reflow soldering, selects butyl rubber with a hardness of 88 degrees or more, thereby ensuring that the rubber particles of the product do not deform when the product is reflow soldering, improves and expands other series of products, and improves the overall technology and level of aluminum electrolytic capacitors used in the energy-saving industry by 10%.

[0018] The utility model adopts a laminated busbar for the internal connection of the capacitor of the equipment body, reduces the equivalent series inductance of the capacitor, improves the product's ability to absorb peak voltage during DC filtering, and has strong ability to withstand large ripple current. The polymer solid electrolytic capacitor has the ability to withstand large ripple current and is suitable for providing large current in a short time in the switching power supply circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the anatomical structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the utility model when viewed from above;

[0022] Figure 4 This is a schematic diagram of the structure of the utility model.

[0023] Description of main symbols:

[0024] 1. Aluminum electrolytic capacitor; 2. Rubber sealing plug; 3. Negative lead; 4. Positive lead; 5. Aluminum shell; 6. Core package; 7. Adhesive tape; 8. Lead strip; 9. Isolation paper; 10. Cathode foil. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment. Example

[0026] Please combine Figures 1-4, A high-temperature and high-pressure resistant aluminum electrolytic capacitor of this embodiment includes an aluminum electrolytic capacitor 1. A rubber seal 2 is fixedly connected to the bottom end of the aluminum electrolytic capacitor 1. A negative lead 3 is fixedly connected inside the rubber seal 2, and a positive lead 4 is fixedly connected inside the rubber seal 2;

[0027] An aluminum shell 5 is fixedly connected inside the aluminum electrolytic capacitor 1. A core package 6 is fixedly connected inside the aluminum shell 5. A tape 7 is bonded to the surface of the core package 6. The negative lead 3 is fixedly connected to the bottom end of the core package 6, and the positive lead 4 is fixedly connected to the bottom end of the core package 6. An extraction strip 8 is fixedly connected inside the core package 6, and a separator paper 9 is fixedly connected inside the core package 6. A cathode foil 10 is fixedly connected inside the extraction strip 8. By setting the equipment body in the research and development of high-voltage electrolyte, a new type of waterproof additive is added to the electrolyte, thereby effectively inhibiting the generation of esterified water, ensuring that the product does not bulge at the bottom during reflow soldering. With the change of the impregnation process, the in-machine impregnation technology is studied, shortening the exposure time of the wet core package 6 in the air, reducing the moisture in the electrolyte, ensuring that the product does not bulge at the bottom during reflow soldering, and selecting butyl rubber with a hardness ≥ 88 degrees, thereby ensuring that the rubber particles do not deform during reflow soldering of the product, improving and broadening other series of products, and increasing the overall technology and level of the application of aluminum electrolytic capacitor 1 in the energy-saving industry by 10%.

[0028] The separator paper 9 plays an isolation and insulation role between the anode and cathode aluminum foils of the electrolytic capacitor. The better the quality, the more it can meet the requirements of the capacitor for high voltage resistance, low impedance, and low loss.

[0029] As a further improvement of the above solution, the negative lead 3 is fixedly connected inside the aluminum electrolytic capacitor 1, the positive lead 4 is fixedly connected inside the aluminum electrolytic capacitor 1, and the negative lead 3 is fixedly connected inside the aluminum shell 5.

[0030] The positive lead 4 is fixedly connected inside the aluminum shell 5. The core package 6 is arranged at the top end of the rubber seal 2, and the tape 7 is fixedly connected inside the aluminum electrolytic capacitor 1.

[0031] The core package 6 is fixedly connected inside the aluminum electrolytic capacitor 1, and the extraction strips 8 are symmetrically distributed with the core package 6 as the center.

[0032] The extraction strips 8 are structurally compact and can connect the electrolytic capacitors in series to form a rolled and sealed structure, greatly reducing the volume and also reducing the space occupancy rate of the device.

[0033] The lead-out strip 8 is fixedly connected inside the aluminum electrolytic capacitor 1, and the separator paper 9 is fixedly connected inside the aluminum electrolytic capacitor 1. By arranging that the internal connection of the capacitor of the device body adopts a laminated busbar, the equivalent series inductance of the capacitor is reduced, the ability of the product to absorb spike voltage during DC filtering is improved, and the ability to withstand large ripple current is strong. The polymer solid electrolytic capacitor has the ability to withstand large ripple current and is suitable for providing a large current in a switching power supply circuit for a short time.

[0034] The cathode foil 10 is fixedly connected inside the aluminum electrolytic capacitor 1, the negative lead 3 is fixedly connected inside the core package 6, and the positive lead 4 is fixedly connected inside the core package 6.

[0035] The separator paper 9 is fixedly connected inside the aluminum shell 5, the cathode foil 10 is fixedly connected inside the aluminum shell 5, and the lead-out strip 8 is fixedly connected inside the aluminum shell 5.

[0036] The implementation principle of a high-temperature and high-pressure resistant aluminum electrolytic capacitor in the embodiment of the present application is as follows: Place the device in a suitable position. By arranging the research and development of high-voltage electrolyte for the device body and adding a new type of waterproof additive to the electrolyte, the generation of esterified water can be effectively inhibited, ensuring that the product does not bulge at the bottom during reflow soldering. With the change of the impregnation process and the research on in-machine impregnation technology, the exposure time of the wet core package 6 in the air is shortened, the moisture in the electrolyte is reduced, ensuring that the product does not bulge at the bottom during reflow soldering. Select butyl rubber with a hardness ≥ 88 degrees, thus ensuring that the rubber particles do not deform during reflow soldering of the product, improving and broadening other series of products, and increasing the overall technology and level of the application of the aluminum electrolytic capacitor 1 in the energy-saving industry by 10%. By arranging that the internal connection of the capacitor of the device body adopts a laminated busbar, the equivalent series inductance of the capacitor is reduced, the ability of the product to absorb spike voltage during DC filtering is improved, and the ability to withstand large ripple current is strong. The polymer solid electrolytic capacitor has the ability to withstand large ripple current and is suitable for providing a large current in a switching power supply circuit for a short time.

[0037] The above implementation manners are only the preferred implementation manners of the present utility model and cannot be used to limit the scope of protection of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model belong to the scope of protection required by the present utility model.

Claims

1. A high temperature resistant and pressure resistant aluminum electrolytic capacitor, comprising an aluminum electrolytic capacitor (1), the bottom end of the aluminum electrolytic capacitor (1) being fixedly connected to a rubber sealing plug (2), the interior of the rubber sealing plug (2) being fixedly connected to a negative electrode lead (3), and the interior of the rubber sealing plug (2) being fixedly connected to a positive electrode lead (4); It is characterized in that The aluminum electrolytic capacitor (1) is fixedly connected to an aluminum shell (5) inside, the aluminum shell (5) is fixedly connected to a core bag (6) inside, the surface of the core bag (6) is bonded with an adhesive tape (7), the bottom end of the core bag (6) is fixedly connected to a negative electrode lead (3), the bottom end of the core bag (6) is fixedly connected to a positive electrode lead (4), the inside of the core bag (6) is fixedly connected to a lead strip (8), the inside of the core bag (6) is fixedly connected to an isolation paper (9), and the inside of the lead strip (8) is fixedly connected to a cathode foil (10).

2. A high temperature resistant and pressure resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The negative electrode lead (3) is fixedly connected to the inside of the aluminum electrolytic capacitor (1), the positive electrode lead (4) is fixedly connected to the inside of the aluminum electrolytic capacitor (1), and the negative electrode lead (3) is fixedly connected to the inside of the aluminum shell (5).

3. The high temperature resistant and pressure resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The interior of the aluminum housing (5) is fixedly connected with a positive lead (4), the top end of the rubber sealing plug (2) is provided with a core bag (6), and the interior of the aluminum electrolytic capacitor (1) is fixedly connected with an adhesive tape (7).

4. A high temperature resistant and pressure resistant aluminum electrolytic capacitor as claimed in claim 3, characterized in that: The core package (6) is fixedly connected to the inside of the aluminum electrolytic capacitor (1), and the lead bars (8) are symmetrically distributed with the core package (6) as the center.

5. The high temperature resistant and pressure resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The lead-out bar (8) is fixedly connected to the inside of the aluminum electrolytic capacitor (1), and the isolation paper (9) is fixedly connected to the inside of the aluminum electrolytic capacitor (1).

6. A high temperature resistant and pressure resistant aluminum electrolytic capacitor as claimed in claim 5, characterized in that: The cathode foil (10) is fixedly connected to the inside of the aluminum electrolytic capacitor (1), the negative electrode lead (3) is fixedly connected to the inside of the core package (6), and the positive electrode lead (4) is fixedly connected to the inside of the core package (6).

7. A high temperature resistant and pressure resistant aluminum electrolytic capacitor as claimed in claim 6, characterized in that: The isolation paper (9) is fixedly connected to the inside of the aluminum shell (5), the cathode foil (10) is fixedly connected to the inside of the aluminum shell (5), and the lead-out bar (8) is fixedly connected to the inside of the aluminum shell (5).

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