Capacitor impregnation sealing cabinet

Abstract

The invention relates to a capacitor impregnation sealing cabinet, which comprises a bottom plate, side plates and a top plate, and is characterized in that the bottom plate, the side plates and the top plate are mutually connected to form a sealing cabinet body; the impregnation cabinet is characterized in that a rack is mounted in the cabinet body, and a supporting plate for fixing impregnation equipment is arranged on the rack; a dehumidification device is arranged in the cabinet body, and an air inlet, an air outlet and an air outlet of the dehumidification device are communicated with the internal space of the cabinet body to form a closed circulating air duct; the cabinet body is provided with a plurality of sealing doors used for opening and closing. Adjusting micro-positive pressure dehumidification can be achieved in the cabinet, energy consumption is reduced, the dehumidification effect and drying efficiency are improved, and the quality and reliability of the capacitor are improved.

Description

Technical Field

[0001] This invention relates to the field of capacitor manufacturing technology, and in particular to a capacitor impregnation and sealing cabinet. Background Technology

[0002] Before impregnating the aluminum foil in an aluminum electrolytic capacitor with electrolyte, it is essential to thoroughly dry it to remove moisture. This ensures that the electrolyte can be effectively absorbed into the porous microstructure of the aluminum foil during impregnation, allowing the capacitor to achieve its intended electrical performance. If the foil is not thoroughly dehumidified and dried before impregnation, moisture will react chemically and hydrolyze with the electrolyte, causing premature deterioration. Furthermore, moisture can damage the anolyte film, accelerating catalytic corrosion and hydration, leading to dielectric degradation and ultimately capacitor failure.

[0003] Currently, the traditional processing method involves separating the dehumidification and impregnation processes of aluminum electrolytic capacitors into two different stations. First, the capacitors are placed in a dehumidification device to remove moisture. After dehumidification, the dried capacitors are transferred to an impregnation tank for the impregnation process. Because the impregnation cabinet cannot control the humidity inside, the capacitors are exposed to the outside air during the transfer process, causing them to reabsorb moisture from the air, resulting in incomplete dehumidification, poor dehumidification efficiency, and high energy consumption. There is an urgent need to address the fundamental problem of the extreme sensitivity of aluminum electrolytic capacitors to moisture. Summary of the Invention

[0004] To overcome the technical deficiencies of existing technologies, this invention provides a capacitor impregnation and sealing cabinet. This cabinet enables adjustable micro-positive pressure dehumidification, reducing energy consumption and improving dehumidification and drying efficiency. It effectively addresses the fundamental problem of aluminum electrolytic capacitors' extreme sensitivity to moisture.

[0005] The technical problem solved by this invention is achieved through the following technical solution: A capacitor impregnation sealing cabinet includes a base plate, side plates, and a top plate, which are interconnected to form a sealed cabinet body. The cabinet body is characterized by: a frame installed inside, with a support plate on the frame for fixing impregnation equipment; a dehumidification device installed inside the cabinet, with its air inlet, outlet, and exhaust outlet all communicating with the internal space of the cabinet to form a closed-loop air duct; and a sealed door for opening and closing on the cabinet body.

[0006] Preferably, the two side panels are connected by a column, and a connecting component is provided at the connection point between the side panel and the column, wherein the connecting component includes a first connector and a second connector.

[0007] Preferably, the first connector and the second connector are fixedly connected to one side of the side plate and the column, respectively, and the opposite sides of the first connector and the second connector are interlocked to seal and fix the side plate and the column.

[0008] Preferably, the first connector includes a plug groove, a first sealing groove, and a connecting groove; the second connector includes a first insert surface, a second insert surface, and a second sealing groove; wherein the first insert surface is inserted into the plug groove, the second insert surface is inserted into the connecting groove, and the first sealing groove corresponds to the second sealing groove.

[0009] Preferably, a sealing element is provided between the first sealing groove and the second sealing groove, wherein one side of the sealing element is fixed inside the first sealing groove and the other side contacts the second sealing groove, and a cavity is provided inside the sealing element; a through hole communicating with the cavity is provided inside the first sealing groove, and the through hole communicates with the inner cavity of the cabinet.

[0010] Preferably, the column includes a first fixing plate and a second fixing plate that are perpendicular to each other, wherein the first fixing plate and the second fixing plate are provided with a second connecting member at the joint end with the side plate, and one side of the first fixing plate and the second fixing plate are respectively sealed to the side plate.

[0011] Preferably, a crossbeam is connected at the upper end between the adjacent columns, wherein the top of the crossbeam is provided with a plug for connecting and fixing the top plate, wherein the plug matches and connects with the installation socket at the edge of the top plate, and the crossbeam and the top plate form a sealed connection.

[0012] Preferably, a sealing strip is provided on the outer edge of the sealed door, wherein the sealing strip is tightly fitted with the flange of the side panel to form a contact surface; an observation window is provided on the sealed door, and a control panel for controlling the immersion program is provided on the outside of the cabinet.

[0013] Preferably, the tray is provided with an oven mounting base, an impregnation tank mounting base, a dehumidifier mounting base, and a liquid storage tank mounting base.

[0014] Preferably, the oven mounting bases are arranged in a row at intervals on the tray, and the impregnation tank mounting bases are arranged in a row at intervals on the tray, with the oven mounting bases and the impregnation tank mounting bases matching and corresponding to each other.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention employs a cabinet assembled from a base plate, side plates, and a top plate. Through improved structural design, it not only facilitates disassembly and maintenance of equipment but also enhances the cabinet's sealing, allowing the internal space to meet a slightly positive pressure condition. Furthermore, the cabinet's interior, combined with a dehumidification device, forms a dehumidification circulation duct to provide a dry atmosphere. The humidity within the cabinet is controllable, achieving dehumidification under slightly positive pressure, effectively improving the humidity of the impregnation space. This effectively avoids the phenomenon of poor dehumidification caused by different material displacements during element impregnation. Moreover, the cabinet's interior incorporates an impregnation tank and a baking oven, allowing dehumidification and impregnation processes to occur simultaneously within the cabinet, further enhancing the dehumidification effect. The residual moisture rate can be reduced to below 8 ppm, thus breaking through the limits of traditional drying and achieving deep dehydration. This process improves the stability of capacitor elements, meeting the quality requirements of high-end capacitors and effectively solving the fundamental problem of the extreme sensitivity of aluminum electrolytic capacitors to moisture.

[0016] 2. A connecting component is provided at the joint between the side panel and the column. This connecting component is not only airtight but also easy to disassemble and assemble. The improved structural design allows the entire cabinet to be quickly disassembled and assembled, making maintenance and repair more convenient and improving disassembly and maintenance efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the cabinet of the present invention.

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the cabinet of the present invention.

[0020] Figure 3 This is a partial perspective three-dimensional structural schematic diagram of the present invention.

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the frame of the present invention.

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the pallet of the present invention.

[0023] Figure 6 This is a schematic diagram of the three-dimensional structure of the side plate and column of the present invention.

[0024] Figure 7 This is a top view schematic diagram of the cabinet of the present invention.

[0025] Figure 8 This is the present invention. Figure 7 A magnified partial structural diagram of the connecting component in the middle E.

[0026] Figure 9 This is the present invention. Figure 6 A schematic diagram of the first connecting component in C.

[0027] Figure 10 This is the present invention. Figure 6 A schematic diagram of the second connecting component in section D.

[0028] Figure 11 This is the present invention. Figure 1 A schematic diagram of the three-dimensional structure of A.

[0029] Figure 12 This is the present invention. Figure 1 A schematic diagram of the three-dimensional structure of B.

[0030] Figure 13 This is a three-dimensional structural diagram of the dehumidification device of the present invention.

[0031] 1. Cabinet body; 101. Base plate; 102. Side plate; 103. Top plate; 1021. First connector; 1031. Mounting groove; 1032. Insert strip; 10211. Insert groove; 10212. First sealing groove; 10213. Connecting groove; 10214. Through hole; 2. Upright column; 201. First fixing plate; 202. Second fixing plate; 203. Second connector; 204. Sealing element; 2031. First insertion surface; 2032. Second insertion surface; 2033. Second sealing groove; 2041. Cavity; 2042. Buckle; 3. Crossbeam; 301. Insert block; 302 1. Socket; 4. Sealing door; 401. Sealing strip; 5. Observation window; 6. Control panel; 7. Frame; 701. Horizontal bar; 702. Vertical bar; 703. Pad; 8. Tray; 801. Oven mounting base; 802. Impregnation tank mounting base; 803. Liquid storage tank mounting base; 804. Dehumidifier mounting base; 9. Gripping mechanism; 901. Robotic arm; 902. X-axis track; 903. Y-axis track; 10. Dehumidifier; 1011. Air inlet; 1002. Air outlet; 1003. Exhaust vent. Detailed Implementation

[0032] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings: The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the terms "both sides," "both ends," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In addition, the term "comprising" and any variations thereof mean "at least comprising."

[0034] In the description of this invention, it should be understood that the terms "first," "second," etc., are used to distinguish and do not indicate the order of precedence.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1

[0036] like Figures 1-3 As shown, a capacitor impregnation sealing cabinet includes a base plate 101, side plates 102, and a top plate 103, which are interconnected to form a sealed cabinet body 1. The cabinet body 1 is characterized by: a frame 7 installed inside, with a support plate 8 for fixing the impregnation equipment on the frame 7; a dehumidification device 10 installed inside the cabinet body 1, with its air inlet 1001, air outlet 1002, and exhaust outlet 1003 all communicating with the internal space of the cabinet body 1 to form a closed circulating air duct; and a sealing door 4 for opening and closing on the cabinet body 1.

[0037] Specifically, the bottom plate 101 is parallel to the top plate 103, and the side plate 102 is vertically located between the bottom plate 101 and the top plate 103, with its upper and lower ends connected to the top plate 103 and the bottom plate 101 respectively to form a sealed cabinet 1. The inner wall of the cabinet 1 is coated with an anti-corrosion coating, and the internal space of the cabinet 1 is used for the drying and impregnation of capacitor elements.

[0038] like Figures 2-3As shown, a frame 7 is installed inside the cabinet 1. The frame 7 includes interconnected horizontal bars 701 and vertical bars 702, with pads 703 mounted on the horizontal bars 701. The horizontal bars 701 and vertical bars 702 are staggered to form a frame structure, supporting the top plate 103, side plates 102, and bottom plate 103 of the cabinet 1, making the entire cabinet 1 structurally robust and stable. A tray 8 for fixing the impregnation equipment is installed on the frame 7. The tray 8 is horizontally installed in the middle of the frame 7, and the horizontal bars 701 and vertical bars 702 fix the tray 8. In this embodiment, the tray 8 adopts a plate-like structure, dividing the internal space of the cabinet 1 into an upper compartment and a lower compartment. The upper compartment is used for dehumidifying and drying capacitor elements and for impregnation operations, while the lower compartment is used for installing impregnation pipelines and the electrical pipelines of the entire machine. The upper and lower compartments facilitate dehumidification and impregnation operations and daily equipment maintenance.

[0039] Specifically, the tray 8 is equipped with an oven mounting base 801, an impregnation tank mounting base 802, a dehumidifier mounting base 804, and a liquid storage tank mounting base 803. The number of oven mounting bases 801 and impregnation tank mounting bases 802 is set according to actual needs and is not specifically limited.

[0040] Oven mounting seats 801 are arranged in a row at intervals on the tray 8, and immersion tank mounting seats 802 are arranged in a row at intervals on the tray 8. The oven mounting seats 801 and immersion tank mounting seats 802 are matched and correspond to each other. In this embodiment, the oven mounting seats 801 are preferably arranged in a row in an interval array. The immersion tank mounting seats 802 are preferably arranged in a row in an interval array. The arrangement and number of oven mounting seats 801 and immersion tank mounting seats 802 are consistent.

[0041] More specifically, the oven mounting base 801, the impregnation tank mounting base 802, the dehumidifier mounting base 804, and the liquid storage tank mounting base 803 are all equipped with corresponding mounting slots that match the impregnation equipment package. The impregnation equipment includes an oven, an impregnation tank, a dehumidifier 10, and a liquid storage tank. The oven, impregnation tank, dehumidifier 10, and liquid storage tank can be detachably installed on the oven mounting base 801, the impregnation tank mounting base 802, the dehumidifier mounting base 804, and the liquid storage tank mounting base 803, respectively. The oven, impregnation tank, and liquid storage tank are not shown in the attached diagram. The oven is an infrared spectroscopy oven used for drying the raw materials; the impregnation tank contains an electrolyte solution used for impregnating the raw materials; the liquid storage tank stores the electrolyte solution and is connected to the impregnation tank; the dehumidifier 10 is used to dehumidify the interior of the cabinet 1 and regulate the humidity inside the cabinet 1.

[0042] like Figure 13As shown, the dehumidification device 10 includes a dehumidifier, an air inlet 1001, an air outlet 1002, and an exhaust outlet 1003. In this embodiment, the dehumidifier is one of a compressor type, a condenser type, or a rotary dehumidifier; in this embodiment, a rotary dehumidifier is used. The air inlet 1001, air outlet 1002, and exhaust outlet 1003 of the dehumidification device 10 are all connected to the internal space of the cabinet 1 to form a closed-loop air duct, wherein the air inlet 1001 and the exhaust outlet 1003 are both connected to the outside of the cabinet 1. During dehumidification, the fan inside the dehumidification device 10 draws air from outside the cabinet 1 into the dehumidification device 10 through the air inlet 1001. The dry air, after absorbing moisture from the air by the rotating wheel, is discharged from the air outlet 1002 into the interior space of the cabinet 1, providing dry air for the interior space of the cabinet 1. On the one hand, the dehumidification device 10 draws in humid air from inside the cabinet 1 through the fan, evaporates the moisture by heating the rotating wheel, and discharges the water vapor from outside the cabinet 1 through the air outlet 1003, forming a closed-loop air duct. The dehumidification device 10 continuously sends dry air inward. The dry air is sent in from one side, forcibly expelling the humid air inside from the air outlet 1003 on the other side, forming a pressure slightly higher than atmospheric pressure, i.e., a slight positive pressure, in which the range of slight positive pressure is 1-2 times the normal atmospheric pressure. In the event of any minute leak, the gas inside cabinet 1 will flow outwards, preventing external moisture from seeping in and thus fundamentally eliminating the intrusion of external moisture. Not only does it prevent external moisture from entering, but the continuous flow of drying gas also dilutes and removes trace amounts of moisture adsorbed during the storage and transfer of the elements, achieving deep drying. This ensures that the interior space of cabinet 1 maintains a preset humidity level, providing drying conditions for the impregnation process inside cabinet 1.

[0043] like Figures 1-3 As shown, the two side panels 102 are connected by a column 2. A connecting component is provided at the connection between the side panel 102 and the column 2, wherein the connecting component includes a first connector 1021 and a second connector 203.

[0044] The first connector 1021 and the second connector 203 are fixedly connected to one side of the side plate 102 and the column 2, respectively. The first connector 1021 and the second connector 203 are interlocked on opposite sides to seal and fix the side plate 102 and the column 2.

[0045] Specifically, one side of the first connector 1021 is fixedly connected to one side of the side plate 102. In this embodiment, the side plate 102 and the first connector 1021 can be integrally formed by stamping metal sheets to obtain an integrated structure of the side plate 102 and the first connector 1021, thereby improving sealing performance and structural stability. Similarly, the column 2 and the second connector 203 can be integrally formed by stamping metal sheets to obtain an integrated structure of the column 2 and the second connector 203, further simplifying the connection structure and thus improving sealing performance and structural stability.

[0046] The column 2 includes a first fixing plate 201 and a second fixing plate 202 that are perpendicular to each other. The first fixing plate 201 and the second fixing plate 202 are provided with a second connector 203 at the joint end with the side plate 102. The first fixing plate 201 and the second fixing plate 202 are respectively sealed to the side plate 102 on one side.

[0047] The two side panels 102 are connected by uprights 2, which are set at the four corners of the cabinet 1 to enhance the stability of the cabinet 1. At the same time, the side panels 102 and the uprights 2 are detachable, which facilitates the disassembly and assembly of equipment for maintenance and repair.

[0048] A crossbeam 3 is connected at the upper end between adjacent columns 2. The top of the crossbeam 3 is provided with a plug 301 for connecting and fixing the top plate 103. The plug 301 matches and connects with the installation socket 1031 at the edge of the top plate 103, and the crossbeam 3 and the top plate 103 form a sealed connection.

[0049] The uprights 2 are connected by crossbeams 3, which further improves the structural stability of the cabinet 1. The crossbeams 3 are combined with the side panels 102, which effectively improves the compressive strength of the side panels 102 under slight positive pressure inside the cabinet 1. At the same time, the combination of the crossbeams 3 and the side panels 102 facilitates the disassembly and assembly of the cabinet.

[0050] The inner side of the crossbeam 3 is sealed and fixed to the side panel 102, and the joint surface of the crossbeam 3 and the top panel 103 forms a sealed connection. A socket 302 is provided at the joint between the crossbeam 3 and the top panel 103, and a strip 1032 is provided at the joint between the top panel 103 and the crossbeam 3. When the crossbeam 3 and the top panel 103 are installed together, the strip 1032 of the top panel 103 is inserted into the socket 302 of the crossbeam 3 to form a sealed connection structure. When disassembling the top panel 103, the top panel 103 and the strip 1032 are pulled out, thus completing the disassembly of the top panel 103, facilitating the assembly and disassembly of the cabinet.

[0051] like Figures 8 to 10 As shown, the first connector 1021 includes a insertion groove 10211, a first sealing groove 10212, and a connecting groove 10213; the second connector 203 includes a first insertion surface 2031, a second insertion surface 2032, and a second sealing groove 2033; wherein the first insertion surface 2031 is inserted into the insertion groove 10211, the second insertion surface 2032 is inserted into the connecting groove 10213, and the first sealing groove 10212 corresponds to the second sealing groove 2033.

[0052] In this embodiment, both the first connector 1021 and the second connector 203 can be formed by one of integral stamping, die casting or turning, and in this embodiment, stamping is preferred.

[0053] When the side panel 102 is installed with the column 2, the first connector 1021 on one side of the side panel 102 and the second connector 203 on the side of the column 2 are interlocked. Specifically, the insertion groove 10211 in the first connector 1021 matches and is inserted into the first insertion surface 2031 in the second connector 203; the connecting groove 10213 in the first connector 1021 matches and is inserted into the second insertion surface 2032 in the second connector 203. After interlocking, the first connector 1021 and the second connector 203 engage to form a connecting assembly, so that the side panel 102 and the column 2 are firmly connected. By connecting the side panel 102 and the column 2 together with the bottom plate 101 and the top plate 103 in sequence, a closed cabinet 1 is obtained. Example 2

[0054] like Figure 8 As shown, Embodiment 2 is a further design of the connecting assembly based on Embodiment 1. The difference lies in that a sealing element 2401 is provided between the first sealing groove 10212 and the second sealing groove 2033. One side of the sealing element 2401 is fixed to the inside of the first sealing groove 10212, and the other side contacts the second sealing groove 2033. A cavity 2041 is provided inside the sealing element 2401. A through hole 10214 communicating with the cavity 2041 is provided inside the first sealing groove 10212, and the through hole 10214 communicates with the inner cavity of the cabinet 1. A buckle 2042 is provided on the side of the sealing element 2401 near the first sealing groove 10212, and the sealing element 2401 is fixed in the first sealing groove 10212 by the buckle 2042.

[0055] The first sealing groove 10212 in the first connector 1021 and the second sealing groove 2033 in the second connector 203 are matched in shape, size and position. After the first connector 1021 and the second connector 203 are inserted and joined, the first sealing groove 10212 and the second sealing groove 2033 meet to form a cavity, and the sealing member 2401 is installed in the sealing cavity formed by the meeting of the first sealing groove 10212 and the second sealing groove 2033.

[0056] When the air pressure inside the cabinet 1 increases, the gas inside the cabinet 1 enters the cavity 2041 inside the seal 2401 through the through hole 10214 on the inner side of the first sealing groove 10212. This causes the air pressure in the cavity 2041 to increase and expand. Consequently, the outer wall of the seal 2401 expands outward and presses against the inner walls of the first sealing groove 10212 and the second sealing groove 2033 to form a sealing structure. This further improves the sealing performance, prevents the convection of water vapor inside and outside the cabinet 1, and makes the internal space of the cabinet 1 a sealed space. Example 3

[0057] Example 3 differs from Example 2 in that a sealing strip 401 is provided on the outer edge of the sealing door 4. The sealing strip 401 has a U-shaped groove, which fits tightly with the flange of the side plate 102 to form a contact surface. This improves the sealing effect of the sealing door 4, ensuring good sealing performance when the sealing door 4 is closed. During actual impregnation operations, the sealing door 4 can be opened and closed for impregnation operations or equipment maintenance. An observation window 5 is provided on the sealing door 4. The observation window 5 is made of transparent, pressure-resistant glass. When the impregnation operation begins, the sealing door 4 is closed. The internal air pressure of the cabinet 1 is higher than the external air pressure, allowing observation of the internal equipment's operation through the observation window 5 without disrupting the internal and external air pressure difference or the internal air dryness. A control panel 6 for controlling the impregnation program is provided on the outside of the cabinet 1. Operators read impregnation and dehumidification data through the external control panel 6 and control the impregnation and dehumidification parameters through the control panel 6. A gripping mechanism 9 is installed at the upper part of the cabinet 1. The gripping mechanism 9 includes a robotic arm 901, an X-axis track 902, and a Y-axis track 903. During operation, the robotic arm 901 moves along the X-axis track 902 and the Y-axis track 903. The gripping mechanism 9 uses a robotic arm. During the immersion operation, the gripping mechanism 9 moves and rises and falls on the X-axis track 902 and the Y-axis track 903 to grasp and transfer the capacitor elements between the oven station and the immersion station, thereby realizing the free transfer of the elements between the baking and immersion stations.

[0058] For dehumidification, it is essential to ensure the core conditions of the micro-positive pressure system. This involves controlling air dryness and ensuring the injected gas has an extremely low dew point to effectively remove deep moisture from the particles. Pressure control is crucial; maintaining a stable, low positive pressure, such as 200-3000 Pa, is necessary to effectively block outside air while preventing excessively rapid airflow that could lead to localized over-drying or energy waste. Temperature and time coordination are also important. Micro-positive pressure is typically combined with medium-low temperature heating, such as 80-120℃, to accelerate moisture migration through airflow, potentially shortening the overall drying time.

[0059] Working principle: The robotic arm 901 delivers capacitor substrates pushed from the upstream station into the oven inside cabinet 1. After loading, the sealing door 4 is closed, and the dehumidification device 10 is activated to introduce dry gas into cabinet 1 and expel moisture, creating a slightly positive pressure inside cabinet 1 and forming a dry, sealed space. After the oven finishes baking the substrates, the robotic arm 901 transfers the dried substrates from the oven to an impregnation tank for impregnation. After impregnation, the robotic arm 901 removes the substrates from the impregnation tank and transfers them to the discharge point, completing the drying and impregnation of the substrates. This simultaneous drying and impregnation in a dry atmosphere improves dehumidification effect and efficiency.

[0060] By maintaining a slightly positive pressure environment inside cabinet 1, not only is the dew point of the internal air lowered, but the penetration of external humid air is also prevented. The air pressure inside cabinet 1 is greater than the external pressure, causing the sealing element 2401 to expand and compress, enhancing the sealing performance of cabinet 1 and preventing external moisture from seeping in, thus maintaining the preset dryness of cabinet 1. After the elements are thoroughly dried, on the one hand, the ionization breakdown source that may occur later is effectively eliminated. Because moisture is polar, it will ionize under the action of a strong electric field, producing free H⁺ and OH⁻ ions. These ions are accelerated in the electric field and will collide with the molecular chains of the dielectric, destroying its structure and ultimately leading to local breakdown. The electrolyte impregnation in the slightly positive pressure drying environment ensures that the dielectric is in an absolutely dry state, fundamentally eliminating this major breakdown mechanism problem. On the other hand, the dried elements effectively protect the ultrathin electrodes, preventing them from being oxidized or corroded from the edges by a humid environment, which would lead to increased electrode resistance, increased losses, and even failure due to local overheating during pulse charging and discharging. After dehumidification and drying, the energy loss caused by moisture in the capacitor is completely eliminated, minimizing the capacitor's own energy consumption. Dehumidification and drying of the capacitor within this cabinet effectively improves capacitor performance and enhances capacitor quality.

[0061] After the substrate is thoroughly dried, it effectively eliminates the sources of ionization breakdown that may occur later. On the other hand, it effectively protects the ultrathin electrode from oxidation or corrosion starting from the edges in a humid environment, which can lead to increased electrode resistance, increased losses, or even failure due to local overheating during pulse charging and discharging.

[0062] Compared to traditional vacuum heating drying, the core performance improvement brought by micro-positive pressure drying is that through continuous, clean, and ultra-low dew point drying airflow, the sealed cabinet creates a drying environment that provides ideal conditions for the formation and repair of capacitor element oxide film, resulting in higher dielectric strength, lower leakage current, and more margin in breakdown voltage (UR).

[0063] Furthermore, reducing hydrated ions and impurities that cause losses at the source results in lower initial tanδ and ESR values, and better stability during high-temperature and lifespan testing. Deep dehumidification of capacitor elements fundamentally inhibits electrolyte decomposition, gas generation, and corrosion processes. The failure rate of capacitors under high-temperature loads is significantly reduced, and the predicted lifespan is extended several times over.

[0064] The micro-positive pressure drying process for aluminum electrolytic capacitor elements is a key technology that improves the product's intrinsic quality and inherent characteristics. Its direct effect is the achievement of superior initial electrical parameters such as leakage current, tanδ, and ESR. Furthermore, its fundamental effect is the creation of a more stable and robust oxide film dielectric. Secondly, its long-term effect is the significant suppression of chemical reactions that lead to failure, resulting in a leap in lifespan and reliability. This is crucial for aluminum electrolytic capacitors with industrial, automotive, and long-life requirements. It also effectively addresses the fundamental pain point of aluminum electrolytic capacitors' extreme sensitivity to moisture.

[0065] It should be emphasized that the embodiments described in this invention are illustrative rather than limiting. Therefore, this invention is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this invention also fall within the scope of protection of this invention.

Claims

1. A capacitor impregnation and sealing cabinet, comprising a base plate (101), side plates (102), and a top plate (103), wherein the base plate (101), side plates (102), and top plate (103) are interconnected to form a sealed cabinet body (1); characterized in that: The cabinet (1) is equipped with a rack (7) inside, and the rack (7) is provided with a support plate (8) for fixing the impregnation equipment; the cabinet (1) is equipped with a dehumidification device (10), and the air inlet (1001), air outlet (1002), and exhaust outlet (1003) of the dehumidification device (10) are all connected to the internal space of the cabinet (1) to form a closed circulation air duct; the cabinet (1) is provided with a sealed door (4) for opening and closing.

2. The capacitor impregnation and sealing cabinet according to claim 1, characterized in that: The two side plates (102) are connected by a column (2), and a connecting component is provided at the connection between the side plate (102) and the column (2), wherein the connecting component includes a first connector (1021) and a second connector (203).

3. The capacitor impregnation and sealing cabinet according to claim 2, characterized in that: The first connector (1021) and the second connector (203) are fixedly connected to one side of the side plate (102) and the column (2), respectively. The first connector (1021) and the second connector (203) are interlocked on opposite sides to seal and fix the side plate (102) and the column (2).

4. A capacitor impregnation and sealing cabinet according to claim 2, characterized in that: The first connector (1021) includes a plug groove (10211), a first sealing groove (10212), and a connecting groove (10213); the second connector (203) includes a first insert surface (2031), a second insert surface (2032), and a second sealing groove (2033); wherein the first insert surface (2031) is inserted into the plug groove (10211), the second insert surface (2032) is inserted into the connecting groove (10213), and the first sealing groove (10212) corresponds to the second sealing groove (2033).

5. A capacitor impregnation and sealing cabinet according to claim 4, characterized in that: A sealing element (2401) is provided between the first sealing groove (10212) and the second sealing groove (2033). One side of the sealing element (2401) is fixed inside the first sealing groove (10212), and the other side is in contact with the second sealing groove (2033). A cavity (2041) is provided inside the sealing element (204). A through hole (10214) communicating with the cavity (2041) is provided inside the first sealing groove (10212). The through hole (10214) is communicating with the inner cavity of the cabinet (1).

6. A capacitor impregnation and sealing cabinet according to claim 1, characterized in that: The column (2) includes a first fixing plate (201) and a second fixing plate (202) that are perpendicular to each other. The first fixing plate (201) and the second fixing plate (202) are provided with a second connector (203) at the joint end with the side plate (102). The first fixing plate (201) and the second fixing plate (202) are respectively sealed to the side plate (102) on one side.

7. A capacitor impregnation and sealing cabinet according to claim 6, characterized in that: The upper ends of the adjacent columns (2) are connected by a crossbeam (3), wherein the top of the crossbeam (3) is provided with a plug (301) for connecting and fixing the top plate (103), wherein the plug (301) matches and connects with the installation socket (1031) at the edge of the top plate (103), and the crossbeam (3) and the top plate (103) form a sealed connection.

8. A capacitor impregnation and sealing cabinet according to claim 1, characterized in that: A sealing strip (401) is provided on the outer edge of the sealing door (4), wherein the sealing strip (401) and the flange of the side panel (102) are tightly fitted to form a contact surface; an observation window (5) is provided on the sealing door (4), and a control panel (6) for controlling the immersion program is provided on the outside of the cabinet (1).

9. A capacitor impregnation and sealing cabinet according to claim 1, characterized in that: The tray (8) is provided with an oven mounting base (801), an impregnation tank mounting base (802), a dehumidifier mounting base (804), and a liquid storage tank mounting base (803).

10. A capacitor impregnation and sealing cabinet according to claim 9, characterized in that: The oven mounting base (801) is arranged in a row at intervals on the tray (8), and the impregnation tank mounting base (802) is arranged in a row at intervals on the tray (8). The oven mounting base (801) and the impregnation tank mounting base (802) are matched and correspond to each other.

Images