Solid-liquid mixed state aluminum electrolytic capacitor

Abstract

The utility model discloses a solid -liquid mixed state aluminum electrolytic capacitor, it includes aluminum alloy capacitor protection shell, capacitor winding structure, polar plate lead conductor, capacitor top explosion -proof packaging cover and capacitor bottom aluminum thickened bottom, aluminum alloy capacitor protection shell use material is pure aluminum, and the capacitor winding structure is installed to aluminum alloy capacitor protection shell inside cavity, and the K type guide needle is fixedly connected to polar plate lead conductor top, and the capacitor top explosion -proof packaging cover is fixedly connected to K type guide needle bottom, and the capacitor bottom aluminum thickened bottom is fixedly connected to aluminum alloy capacitor protection shell inside bottom, and the electrolyte liquid is injected to aluminum alloy capacitor protection shell inside cavity, and is born this all aspects performance are excellent capacitor through electrolyte liquid and the part in capacitor winding structure inside.

Description

Technical Field

[0001] This utility model relates to the field of solid-liquid hybrid capacitor technology, and in particular to a solid-liquid hybrid aluminum electrolytic capacitor. Background Technology

[0002] The invention of capacitors was initially due to the inability of power sources to provide a large current instantaneously to start the power supply system. Capacitors can provide a large instantaneous current and have the function of stabilizing voltage, thus preventing voltage drops caused by slow power supply. Capacitors are used in solid-liquid mixed-state aluminum electrolysis for various indices such as capacity and voltage resistance.

[0003] There are solid-state capacitors and liquid capacitors on the market. Solid-state capacitors have less energy storage capacity, while liquid capacitors have more. Solid-state capacitors have lower voltage, but liquid capacitors have extremely high voltage. In terms of ESR, leakage current, LC, high-temperature lifespan, and failure modes, each has its own advantages and disadvantages. However, the solid-liquid hybrid aluminum electrolytic capacitor avoids the disadvantages of both solid-state capacitors and liquid capacitors. Compared with the two, its performance in all aspects is relatively superior. Utility Model Content

[0004] The purpose of this invention is to provide a solid-liquid hybrid aluminum electrolytic capacitor, which utilizes the advantages of both solid and liquid capacitors to create a capacitor with relatively excellent performance in all aspects.

[0005] To achieve the above objectives, a solid-liquid hybrid aluminum electrolytic capacitor is provided, comprising: an aluminum alloy capacitor protective shell, a capacitor winding structure, electrode lead conductors, an explosion-proof top cover, and a thickened aluminum bottom. The aluminum alloy capacitor protective shell is made of pure aluminum. The capacitor winding structure is installed inside the aluminum alloy capacitor protective shell. The bottom of the explosion-proof top cover is fixedly connected to the electrode lead conductors. A K-type guide pin is fixedly connected to the top of the electrode lead conductors. The bottom of the K-type guide pin is fixedly connected to the explosion-proof top cover. The thickened aluminum bottom is installed inside the aluminum alloy capacitor protective shell.

[0006] As a preferred embodiment, the explosion-proof encapsulation cover on the top of the capacitor has a cross-shaped groove.

[0007] As a preferred embodiment, the outermost layer of the capacitor winding structure is provided with an outer layer of electrolytic paper, the inner wall of the outer layer of electrolytic paper is tightly bonded with a cathode aluminum foil, the inner wall of the cathode aluminum foil is tightly bonded with a middle layer of electrolytic paper, and the inner wall of the middle layer of electrolytic paper is tightly bonded with an anode aluminum foil.

[0008] As a preferred embodiment, the surface of the anode aluminum foil is etched with an uneven, rough structure, and the surface of the cathode aluminum foil is etched with an uneven, rough structure.

[0009] As a preferred embodiment, the aluminum alloy capacitor protective shell has an internal cavity filled with electrolyte.

[0010] As a preferred embodiment, the inner surface of the anode aluminum foil is fixedly connected with multiple positive conductor plates at intervals, and the inner surface of the cathode aluminum foil is fixedly connected with multiple negative conductor plates at intervals. The surfaces of the multiple positive and negative conductor plates have conductive polymer coatings.

[0011] As a preferred embodiment, the exposed top ends of the plurality of positive and negative conductor plates are all fixedly connected to the plate lead conductors.

[0012] As a preferred embodiment, the outer wall of the aluminum alloy capacitor protective shell is tightly fitted with a capacitor insulating plastic packaging layer, and the capacitor insulating plastic packaging layer has a flame-retardant layer.

[0013] As a preferred embodiment, the electrode lead conductor is an elastic arc-shaped flexible sheet, and the end of the electrode lead conductor is fixed to a K-type guide pin by a solder pad.

[0014] As a preferred embodiment, the K-type guide pins are of two lengths, one long and one short, with the longer guide pin being the positive electrode and the shorter guide pin being the negative electrode. Both the positive and negative guide pins have anti-detachment lugs for positioning on the circuit board, and the anti-detachment lugs of the positive and negative guide pins face different directions.

[0015] The above-mentioned solution has the following beneficial effects: 1. Solid capacitors are generally limited to voltages below 25V, but even some technologically advanced manufacturers can only achieve 35V to 50V. Liquid capacitors, on the other hand, can easily reach 400V or higher. However, without changing the volume, solid-liquid hybrid aluminum electrolytic capacitors can achieve higher voltages than solid capacitors and have the advantage of smaller size than liquid capacitors.

[0016] 2. Compared with solid capacitors, hybrid aluminum electrolytic capacitors have a relatively higher ESR, lower LC leakage current, and significantly improved leakage current. Their operating life at high temperatures is much longer than that of liquid capacitors. As they are made of aluminum, they have the advantages of relatively low weight and good heat dissipation.

[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] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a complete axonometric view of a solid-liquid hybrid aluminum electrolytic capacitor according to this utility model; Figure 2This is an exploded isometric view of a solid-liquid mixed-state aluminum electrolytic capacitor according to the present invention. Figure 3 This is a bottom isometric view of a solid-liquid hybrid aluminum electrolytic capacitor according to the present invention. Figure 4 This is a partial detail view of the winding structure of a solid-liquid hybrid aluminum electrolytic capacitor according to this utility model.

[0019] Legend: 1. K-type lead pin; 2. Insulating plastic packaging for capacitor; 3. Aluminum alloy capacitor protective shell; 4. Capacitor winding structure; 5. Electrode lead conductor; 6. Explosion-proof top cover for capacitor; 7. Thickened aluminum bottom for capacitor; 11. Anti-detachment lug; 21. Flame retardant layer; 401. Outer electrolytic paper; 402. Cathode aluminum foil; 403. Middle electrolytic paper; 404. Anode aluminum foil; 405. Negative conductor plate; 406. Positive conductor plate; 407. Electrolyte; 408. Conductive polymer coating layer. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] Reference Figure 1-4 This utility model discloses a solid-liquid hybrid aluminum electrolytic capacitor, comprising: an aluminum alloy capacitor protective shell 3, a capacitor winding structure 4, electrode lead conductors 5, an explosion-proof encapsulation cover 6 on the top of the capacitor, and a thickened aluminum base 7 on the bottom of the capacitor. The aluminum alloy capacitor protective shell 3 is made of pure aluminum. The capacitor winding structure 4 is installed inside the aluminum alloy capacitor protective shell 3. A K-type guide pin 1 is fixedly connected to the top of the electrode lead conductor 5. The K-type guide pin 1 has one long and one short pin, with the long pin being the positive electrode and the short pin being the negative electrode. Each guide pin has an anti-detachment lug 11 for positioning on the circuit board. The bottom of the K-type guide pin 1 is fixedly connected to the explosion-proof encapsulation cover 6 on the top of the capacitor. The thickened aluminum bottom 7 of the capacitor is installed inside the aluminum alloy capacitor protective shell 3. The use of aluminum material is for two reasons: first, to reduce weight; second, to solve the heat dissipation problem and improve the service life of the capacitor. The explosion-proof encapsulation cover 6 on the top of the capacitor has a cross-shaped groove, which can greatly reduce the sound and force of the explosion when the capacitor is exposed to high temperature and explosion, and protect the chips around the components from damage. The K-type guide pin 1 has a left longer and right shorter length, that is, the longer one is the positive terminal and the shorter one is the negative terminal. Setting different lengths is also to avoid installation errors that may cause accidents, thereby increasing and improving safety.

[0022] The outermost layer of the capacitor winding structure 4 is provided with an outer layer of electrolytic paper 401. The inner wall of the outer layer of electrolytic paper 401 is tightly attached to a cathode aluminum foil 402. The inner wall of the cathode aluminum foil 402 is tightly attached to a middle layer of electrolytic paper 403. The inner wall of the middle layer of electrolytic paper 403 is tightly attached to an anode aluminum foil 404. The surface of the anode aluminum foil 404 and the surface of the cathode aluminum foil 402 are etched with an uneven and rough structure. In a capacitor of the original size, by etching uneven pits on the surface of both the anode and cathode aluminum foils, the area of ​​the aluminum foil can be increased several times, making the capacitance much larger than that of a capacitor of the same size. The more uneven pits are etched on the surface of the aluminum foil, the larger the area of ​​the aluminum foil, which also means that the storage capacity of the capacitor is greater.

[0023] The internal cavity of the aluminum alloy capacitor protective shell 3 is filled with electrolyte 407. Electrolyte 407 has the function of repairing the oxide film on the aluminum foil, preventing performance degradation caused by oxidation of the negative conductor plate 405 and the positive conductor plate 406. Simultaneously, with the assistance of electrolyte 407, leakage current is also less pronounced, similar to that of liquid capacitors. In terms of lifespan, the hybrid solid-liquid aluminum electrolytic capacitor does not experience the drastic lifespan reduction seen in liquid capacitors due to the presence of electrolyte 407; its lifespan is close to that of solid capacitors. The positive conductor plate 406 is fixedly connected to the inner surface of the anode aluminum foil 404, and the negative conductor plate 405 is fixedly connected to the inner surface of the cathode aluminum foil 402. Conductive polymers are attached to the surfaces of the positive and negative conductor plates 406 and 405, and are also present on the electrolytic paper. The conductive polymers and electrolyte 407 form an electrolyte system, making the hybrid solid-liquid aluminum... The electrolytic capacitor has better electrical performance. Multiple positive conductor plates 406 and negative conductor plates 405 are fixedly connected to the exposed ends of the plate lead conductors 5. The surfaces of the positive conductor plates 406 and negative conductor plates 405 are coated with conductive polymer coating layers 408. The outer wall of the aluminum alloy capacitor protective shell 3 is tightly fitted with capacitor insulating plastic packaging 2. The capacitor insulating plastic packaging layer 2 has a flame retardant layer 21. In operation after being connected to electricity, the external factors of high temperature combustion can also cause the solid-liquid mixed state aluminum electrolytic capacitor to burn, which may cause explosions and other risks. Therefore, the flame retardancy of the capacitor insulating plastic packaging 2 is very important. It slows down the risk of combustion and heating. When the capacitor heats up slowly, the internal pressure will cause the explosion-proof seal 6 on the top of the solid-liquid mixed state aluminum electrolytic capacitor to crack along the cross-shaped groove, releasing the pressure and preventing explosion during an accident, which greatly improves safety and reliability.

[0024] Working principle: The power supply slowly delivers electricity to the capacitor winding structure 4 inside the solid-liquid hybrid aluminum electrolytic capacitor for storage, which is used to achieve instantaneous release. When the electricity is input, the alumina dielectric layer on the surface of the anode aluminum foil 404 is first subjected to voltage. The conductive polymer becomes the main charge transport channel path, providing extremely low equivalent series resistance (ESR). This gives the solid-liquid hybrid aluminum electrolytic capacitor the ability to operate at high frequencies and respond quickly. The electrolyte 407 immersed in it effectively repairs the alumina and improves the capacitor's withstand voltage and breakdown reliability. The solid-liquid hybrid aluminum electrolytic capacitor retains the high withstand voltage and strong self-healing ability of traditional liquid capacitors, while also achieving the low ESR performance of solid capacitors. It not only has a longer lifespan, but the aluminum heat dissipation can stabilize the operating temperature. The solid-liquid hybrid aluminum electrolytic capacitor obtains the comprehensive advantages of both types of capacitors.

[0025] 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. A solid-liquid hybrid aluminum electrolytic capacitor, comprising: An aluminum alloy capacitor protective shell (3), a capacitor winding structure (4), an electrode lead conductor (5), a capacitor top explosion-proof encapsulation cover (6), and a capacitor bottom aluminum thickened base (7) are characterized in that the aluminum alloy capacitor protective shell (3) is made of pure aluminum material, the capacitor winding structure (4) is installed inside the aluminum alloy capacitor protective shell (3), the capacitor top explosion-proof encapsulation cover (6) is fixedly connected to the bottom of the electrode lead conductor (5), the electrode lead conductor (5) is fixedly connected to the top of the electrode lead conductor (5), the bottom of the K-type guide needle (1) is fixedly connected to the bottom of the capacitor top explosion-proof encapsulation cover (6), and the capacitor bottom aluminum thickened base (7) is installed inside the aluminum alloy capacitor protective shell (3).

2. The solid-liquid hybrid aluminum electrolytic capacitor according to claim 1, characterized in that, The explosion-proof encapsulation cover (6) on the top of the capacitor has a cross-shaped groove.

3. The solid-liquid hybrid aluminum electrolytic capacitor according to claim 1, characterized in that, The outermost layer of the capacitor winding structure (4) is provided with an outer layer of electrolytic paper (401), the inner wall of the outer layer of electrolytic paper (401) is tightly attached with a cathode aluminum foil (402), the inner wall of the cathode aluminum foil (402) is tightly attached with a middle layer of electrolytic paper (403), and the inner wall of the middle layer of electrolytic paper (403) is tightly attached with an anode aluminum foil (404).

4. The solid-liquid hybrid aluminum electrolytic capacitor according to claim 3, characterized in that, The surface of the anode aluminum foil (404) is etched with an uneven, rough structure, and the surface of the cathode aluminum foil (402) is etched with an uneven, rough structure.

5. A solid-liquid hybrid aluminum electrolytic capacitor according to claim 1, characterized in that, The aluminum alloy capacitor protective shell (3) has a cavity filled with electrolyte (407) inside.

6. A solid-liquid hybrid aluminum electrolytic capacitor according to claim 3, characterized in that, The inner surface of the anode aluminum foil (404) is fixedly connected with a plurality of positive conductor plates (406) at intervals, and the inner surface of the cathode aluminum foil (402) is fixedly connected with a plurality of negative conductor plates (405) at intervals. The surfaces of the plurality of positive conductor plates (406) and negative conductor plates (405) are coated with a conductive polymer coating layer (408).

7. A solid-liquid hybrid aluminum electrolytic capacitor according to claim 6, characterized in that, The exposed top ends of the multiple positive conductor plates (406) and negative conductor plates (405) are all fixedly connected to the plate lead conductors (5).

8. The solid-liquid hybrid aluminum electrolytic capacitor according to claim 1, characterized in that, The outer wall of the aluminum alloy capacitor protective shell (3) is tightly fitted with a capacitor insulating plastic packaging layer (2), and the capacitor insulating plastic packaging layer (2) has a flame retardant layer (21).

9. A solid-liquid hybrid aluminum electrolytic capacitor according to claim 1, characterized in that, The electrode lead conductor (5) is an elastic arc-shaped flexible sheet, and the end of the electrode lead conductor (5) is fixed to the K-type guide pin (1) by a solder pad.

10. A solid-liquid hybrid aluminum electrolytic capacitor according to claim 1, characterized in that, The K-type guide pin (1) has one long and one short guide pin. The long guide pin is the positive pole and the short guide pin is the negative pole. Both the positive and negative guide pins have anti-detachment lugs (11) for positioning on the circuit board. The anti-detachment lugs of the positive and negative guide pins face different directions.

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