Combined aluminum electrolytic capacitor and production process thereof

Abstract

The invention relates to the technical field of capacitors, in particular to a combined aluminum electrolytic capacitor and a production process thereof, the combined aluminum electrolytic capacitor comprises a plurality of capacitor monomers which are detachably connected, each capacitor monomer is enclosed by a shell, a lower end cover and an upper end cover to form an accommodating cavity, and an electrode assembly, electrolyte and a liquid bag filled with thermal expansion liquid are arranged in the accommodating cavity; the two ends of the upper end cover are provided with a male connecting part and a female connecting part respectively, and the male connecting part and the female connecting part are detachably connected and provided with a male channel, a female channel, a male blocking assembly and a female blocking assembly, the problems that an aluminum electrolytic capacitor is insufficient in mechanical stability, uneven in electrolyte permeation, poor in electrochemical performance consistency and low in detection efficiency due to the fact that a core body is too thick can be solved, on-demand assembly is achieved through modular design, the liquid bag is used for driving the electrolyte circulation balance performance, the product reliability and the production yield are improved, and the production cost is reduced. And the method is suitable for high-power and miniaturized application scenes.

Description

Technical Field

[0001] This invention relates to the field of capacitor technology, specifically to a combined aluminum electrolytic capacitor and its manufacturing process. Background Technology

[0002] Aluminum electrolytic capacitors are indispensable passive electronic components in electronic equipment and power systems. Their electrical performance stability and production yield directly affect the reliability of end products. Currently, the mainstream aluminum electrolytic capacitors in the industry generally adopt a wound core structure. This structure is formed by alternately stacking anode aluminum foil, cathode aluminum foil, and separator and then winding them into a whole roll. It has the characteristics of mature technology and high production efficiency, and is widely used in small and medium capacity, single-layer aluminum electrolytic capacitors.

[0003] However, with the development of electronic devices towards higher power and miniaturization, the capacity requirements for aluminum electrolytic capacitors are constantly increasing, and multi-layer designs or large-capacity products are becoming increasingly widely used. When using the existing fully wound core structure, the number of core layers or thickness must be increased to meet capacity requirements, resulting in a significant increase in the overall core thickness. This leads to insufficient mechanical stability, making the core prone to deformation and delamination during subsequent processing, transportation, and use. Simultaneously, the integrated structure of the fully wound core makes it difficult for the electrolyte to penetrate evenly into all areas of the core during impregnation, and it is impossible to differentiate control for different areas of the core during packaging, resulting in variations in the electrochemical performance of different parts of the core. Furthermore, this structure makes modular inspection difficult, hindering the rapid location of defective areas within the core. Only the entire wound core can be inspected, which is not only inefficient but may also lead to the scrapping of the entire wound core due to localized defects, severely reducing production yield and product electrical performance consistency, thus limiting the application of aluminum electrolytic capacitors in high-capacity, high-precision applications. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing a combined aluminum electrolytic capacitor and its manufacturing process.

[0005] The objective of this invention is achieved through the following technical solution: a combined aluminum electrolytic capacitor, comprising multiple capacitor cells; the multiple capacitor cells are detachably connected; Each capacitor cell includes a housing, a lower end cap at the bottom of the housing, and an upper end cap at the top of the housing; a receiving cavity is formed between the housing, the lower end cap, and the upper end cap; an electrode assembly and an electrolyte are disposed within the receiving cavity; The accommodating cavity is provided with a liquid bladder; the liquid bladder is filled with a thermally expanding liquid; One end of the upper cover is provided with a male connection part; the other end of the upper cover is provided with a female connection part; the male connection part and the female connection part are detachably connected; the male connection part is provided with a male channel communicating with the accommodating cavity; the female connection part is provided with a female channel communicating with the accommodating cavity; the male connection part is provided with a male blocking component for blocking the male channel; the female connection part is provided with a female blocking component for blocking the female channel.

[0006] The present invention is further configured such that the liquid bladder has a cylindrical structure; the liquid bladder is located at the center of the accommodating cavity.

[0007] The present invention is further configured such that the electrode assembly is formed by sequentially stacking an anode aluminum foil, a first diaphragm, a cathode aluminum foil, and a second diaphragm; the electrode assembly is wound around the outside of the liquid bladder.

[0008] The present invention is further configured such that one end of the lower end cover is provided with a lower boss; the other end of the lower end cover is provided with a lower groove that cooperates with the lower boss.

[0009] The present invention is further configured such that the female connecting part is provided with a female groove; the male connecting part is provided with a male boss that mates with the female groove; the female groove and the male boss are detachably connected.

[0010] The invention is further configured such that the side wall of the female groove is provided with a fixing groove; the side wall of the male protrusion is provided with a fixing pin that mates with the fixing groove; the fixing pin is telescopically movably disposed on the side wall of the male protrusion; a fixing spring is provided between the fixing pin and the male protrusion; wherein the fixing spring is not shown in the figure. The end of the fixing pin is provided with a conical surface.

[0011] The present invention is further configured such that the male connecting portion is provided with a male lifting groove extending along the height direction; the male lifting groove is connected to the male channel; the male blocking assembly includes a male baffle that is movably mounted on the male lifting groove; the male baffle protrudes into the male channel; and a male spring is provided between the male baffle and the bottom of the male lifting groove. The female connector is provided with a female lifting groove extending along the height direction; the female lifting groove is connected to the female channel; the female blocking assembly includes a female baffle that is movably mounted on the female lifting groove; the female baffle protrudes into the female channel; a female spring is provided between the female baffle and the bottom of the female lifting groove.

[0012] The present invention is further configured such that a male push rod is provided at the end of the male protrusion along the length direction; and a female push rod is provided at the end of the female groove along the length direction. One end of the male push rod is used to abut against one end of the female push rod; the other end of the male push rod protrudes into the male lifting groove and abuts against the male baffle. One end of the female push rod is used to abut against one end of the male push rod; the other end of the female push rod protrudes into the female lifting groove and abuts against the female baffle.

[0013] The present invention is further configured such that the other end of the male push rod is provided with a first male driving inclined surface; the side of the male baffle is provided with a second male driving inclined surface that cooperates with the first male driving inclined surface; the other end of the female push rod is provided with a first female driving inclined surface; and the side of the female baffle is provided with a second female driving inclined surface that cooperates with the first female driving inclined surface.

[0014] A manufacturing process for a modular aluminum electrolytic capacitor includes the following steps: S1. Place the liquid bladder filled with thermally expanding liquid on the lower end cap; S2. Wrap the electrode assembly around the outer periphery of the liquid bladder; S3. Assemble the bottom of the outer casing with the lower end cover so that the electrode assembly and liquid bladder are located inside the outer casing; S4. Pour electrolyte between the outer casing and the lower end; S5. Assemble the top of the outer casing with the upper end cover to form a single capacitor unit; S6. Assemble multiple capacitor cells together according to actual needs.

[0015] The beneficial effects of this invention are: I. This invention allows for the detachable connection of multiple capacitor cells, enabling flexible assembly of the required capacity according to actual needs. Furthermore, when a single cell is defective, the entire capacitor does not need to be scrapped; only the faulty capacitor cell needs to be replaced. This significantly improves testing and maintenance efficiency, reduces production costs, and solves the problem of overall scrapping caused by local defects in existing roll-type cores.

[0016] Second, the present invention adopts a single-unit split design, which avoids the risk of deformation and interlayer peeling caused by excessive core layers or thickness. The structure is more stable during processing, transportation and use, and is suitable for the use requirements of high-power equipment.

[0017] Third, the liquid bladder in the center of the cavity of the present invention is filled with thermally expandable liquid. When a single cell heats up, the thermally expandable liquid expands rapidly, driving the electrolyte to circulate between the cells through the connected male and female channels. This not only solves the problem of uneven electrolyte penetration in the existing whole-roll core, but also balances the electrolyte temperature and concentration of each cell, ensuring that the electrochemical performance of all cells is consistent. Attached Figure Description

[0018] The invention will be further illustrated with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the invention. For those skilled in the art, other drawings can be obtained based on the following drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of multiple capacitor cells in this invention. Figure 2This is a cross-sectional view of the combination of multiple capacitor cells in this invention; Figure 3 yes Figure 2 A magnified view of part A in the middle; Figure 4 This is a cross-sectional view from another perspective of the combination of multiple capacitor cells in this invention; Figure 5 yes Figure 4 A magnified view of part B in the middle; Figure 6 This is a schematic diagram of the structure of a single capacitor cell of the present invention; Figure 7 yes Figure 6 A magnified view of part C in the middle; Figure 8 This is a structural schematic diagram of the capacitor cell of the present invention from another perspective; Figure 9 yes Figure 8 A magnified view of part D in the middle; Figure 10 This is a cross-sectional view of a single capacitor cell of the present invention; Figure 11 yes Figure 10 A magnified view of part E in the middle; Figure 12 This is a cross-sectional view of a single capacitor cell of the present invention from another perspective; Figure 13 yes Figure 12 A magnified view of part F in the middle; The components are: 1. Capacitor cell; 2. Shell; 21. Receptacle; 22. Liquid bladder; 3. Lower end cap; 31. Lower boss; 32. Lower groove; 4. Upper end cap; 5. Electrode assembly; 51. Anode aluminum foil; 52. First diaphragm; 53. Cathode aluminum foil; 54. Second diaphragm; 6. Male connector; 61. Male channel; 62. Male boss; 63. Fixing pin; 65. Conical surface; 7. Female connector; 71. Female channel; 72. Female groove; 73. Fixing groove; 81. Male lifting groove; 82. Male baffle; 83. Male spring; 84. Male push rod; 85. First male driving ramp; 86. Second male driving ramp; 91. Female lifting groove; 92. Female baffle; 93. Female spring; 94. Female push rod; 95. First female driving ramp; 96. Second female driving ramp. Detailed Implementation

[0020] The present invention will be further described in conjunction with the following embodiments.

[0021] Depend on Figures 1 to 13 As can be seen, the combined aluminum electrolytic capacitor described in this embodiment includes multiple capacitor cells 1; the multiple capacitor cells 1 are detachably connected to each other. Each capacitor cell 1 includes a housing 2, a lower end cover 3 located at the bottom of the housing 2, and an upper end cover 4 located at the top of the housing 2; a receiving cavity 21 is formed between the housing 2, the lower end cover 3, and the upper end cover 4; an electrode assembly 5 and an electrolyte are disposed in the receiving cavity 21. The cavity 21 is provided with a liquid bladder 22; the liquid bladder 22 is filled with a thermally expandable liquid; wherein the specific heat capacity of the thermally expandable liquid is less than that of the electrolyte, so that the temperature rise rate of the thermally expandable liquid is faster than that of the electrolyte. One end of the upper cover 4 is provided with a male connection part 6; the other end of the upper cover 4 is provided with a female connection part 7; the male connection part 6 and the female connection part 7 are detachably connected; the male connection part 6 is provided with a male channel 61 communicating with the accommodating cavity 21; the female connection part 7 is provided with a female channel 71 communicating with the accommodating cavity 21; the male connection part 6 is provided with a male blocking component for blocking the male channel 61; the female connection part 7 is provided with a female blocking component for blocking the female channel 71.

[0022] Specifically, in the production of the combined aluminum electrolytic capacitor described in this embodiment, the liquid bladder 22 filled with thermally expanding liquid is first placed on the lower end cover 3, and then the electrode assembly 5 is wrapped around the outer periphery of the liquid bladder 22. Next, the bottom of the outer shell 2 is assembled with the lower end cover 3, so that the electrode assembly 5 and the liquid bladder 22 are placed inside the outer shell 2. Then, electrolyte is poured between the outer shell 2 and the lower end. Next, the top of the outer shell 2 is assembled with the upper end cover 4 to form a capacitor unit 1. Finally, multiple capacitor units 1 are assembled together according to actual needs.

[0023] After multiple capacitor cells 1 are assembled together, the male connection portion 6 of capacitor cell 1 is connected to the female connection portion 7 of the adjacent capacitor cell 1. By driving the male blocking assembly and the female blocking assembly, the male channel 61 of capacitor cell 1 is connected to the female channel 71 of the adjacent capacitor cell 1.

[0024] When one of the capacitor cells 1 heats up severely, the thermally expanding liquid in the liquid bladder 22 expands due to heat, thereby increasing the volume of the liquid bladder 22. This allows the electrolyte in the accommodating cavity 21 to be driven into the male channel 61 or female channel 71, and heat conduction occurs between the electrolyte in the accommodating cavity 21 of the adjacent capacitor cell 1 and the male channel 61 or female channel 71 of the adjacent capacitor cell 1, thereby ensuring the consistency of all capacitor cells 1.

[0025] This embodiment allows for the detachable connection of multiple capacitor cells 1, enabling flexible assembly of the required capacity according to actual needs. Furthermore, when a single cell is defective, the entire unit does not need to be scrapped; only the faulty capacitor cell 1 needs to be replaced. This significantly improves testing and maintenance efficiency, reduces production costs, and solves the problem of local defects in existing roll-type cores leading to overall scrapping.

[0026] This embodiment adopts a single-unit split design, which avoids the risk of deformation and interlayer peeling caused by excessive core layers or thickness. The structure is more stable during processing, transportation and use, and is suitable for the use requirements of high-power equipment.

[0027] In this embodiment, the liquid sac 22 in the center of the accommodating cavity 21 is filled with thermally expanding liquid. When a single cell heats up, the thermally expanding liquid expands rapidly, driving the electrolyte to circulate between the cells through the connected male channel 61 and female channel 71. This solves the problem of uneven electrolyte penetration in existing roll-type cores and balances the electrolyte temperature and concentration of each cell, ensuring that the electrochemical performance of all cells is consistent.

[0028] In this embodiment, a combined aluminum electrolytic capacitor is described, wherein the liquid bladder 22 has a cylindrical structure and is located at the center of the accommodating cavity 21. The cylindrical structure of the liquid bladder 22 and its central location within the accommodating cavity 21 allow the electrode assembly 5 to be evenly wound, ensuring balanced force distribution. Furthermore, the thermally expanding liquid, when heated, can diffuse evenly in all directions, driving the electrolyte to circulate comprehensively and preventing uneven local penetration.

[0029] This embodiment describes a combined aluminum electrolytic capacitor, in which the electrode assembly 5 is formed by sequentially stacking an anode aluminum foil 51, a first separator 52, a cathode aluminum foil 53, and a second separator 54; the electrode assembly 5 is wound around the liquid bladder 22. The electrode assembly 5 adopts a stacking and winding method of anode aluminum foil 51-first separator 52-cathode aluminum foil 53-second separator 54, which ensures sufficient contact between the electrode and the separator, and allows the electrolyte driven by the liquid bladder 22 to quickly penetrate to each layer of the electrode, improving electrochemical reaction efficiency and reducing performance differences.

[0030] In this embodiment, a combined aluminum electrolytic capacitor is provided with a lower boss 31 at one end of the lower end cover 3; and a lower groove 32 that mates with the lower boss 31 at the other end of the lower end cover 3.

[0031] Specifically, when multiple capacitor cells 1 are combined, the lower boss 31 and lower groove 32 of the lower end cover 3 of adjacent capacitor cells 1 form a precise fit, and form a bidirectional positioning with the male connection part 6 and female connection part 7 of the upper end cover 4, thus constructing a double fixing structure. The above settings can enhance the overall mechanical stability after combination, prevent axial misalignment and radial shaking of capacitor cells 1 during processing, transportation or use, reduce the risk of deformation and interlayer peeling, and improve the reliability of product structure.

[0032] This embodiment describes a combined aluminum electrolytic capacitor. The female connector 7 has a female groove 72; the male connector 6 has a male boss 62 that mates with the female groove 72; the female groove 72 and the male boss 62 are detachably connected. In this embodiment, the female groove 72 has a fixing groove 73 on its side wall; the male boss 62 has a fixing pin 63 on its side wall that mates with the fixing groove 73; the fixing pin 63 is telescopically movably disposed on the side wall of the male boss 62; a fixing spring is provided between the fixing pin 63 and the male boss 62; and the end of the fixing pin 63 has a conical surface 65.

[0033] Specifically, in this embodiment, the combined aluminum electrolytic capacitor is assembled by inserting the male boss 62 into the female groove 72. The fixing pin 63 automatically engages with the fixing groove 73 on the side wall of the female groove 72 under the action of the fixing spring, achieving detachable locking. The conical surface 65 design guides the male boss 62 to be inserted smoothly, reducing assembly resistance. The elastic preload of the fixing spring can compensate for assembly gaps. This embodiment achieves rapid assembly and disassembly of the capacitor unit 1 through the above settings, meeting the modular combination requirements. At the same time, the connection structure is firm and not easy to loosen. When disassembling, only a reverse pulling force needs to be applied to compress and reset the fixing pin 63, making the operation convenient and taking into account both connection stability and usage flexibility.

[0034] This embodiment describes a combined aluminum electrolytic capacitor. The male connector 6 has a male lifting groove 81 extending along the height direction; the male lifting groove 81 communicates with a male channel 61. The male blocking assembly includes a male baffle 82 movably mounted on the male lifting groove 81; the male baffle 82 protrudes into the male channel 61; a male spring 83 is provided between the male baffle 82 and the bottom of the male lifting groove 81. The female connector 7 has a female lifting groove 91 extending along the height direction; the female lifting groove 91 communicates with a female channel 71. The female blocking assembly includes a female baffle 92 movably mounted on the female lifting groove 91; the female baffle 92 protrudes into the female channel 71; a female spring 93 is provided between the female baffle 92 and the bottom of the female lifting groove 91.

[0035] Specifically, the male spring 83 and the female spring 93 always apply an elastic thrust to the male baffle 82 and the female baffle 92, so that the male baffle 82 and the female baffle 92 protrude into the male channel 61 and the female channel 71 under normal conditions, thereby achieving a normally closed seal of the male channel 61 and the female channel 71. When flow is required, the external force drives the male baffle 82 and the female baffle 92 to compress the springs and descend along the lifting groove, thereby opening the male channel 61 and the female channel 71. Through the above settings, the electrolyte of a single capacitor cell 1 can be effectively prevented from being lost through the channels when stored and transported independently, thus ensuring the independent integrity of the capacitor cell 1.

[0036] In this embodiment, a combined aluminum electrolytic capacitor is provided. The male boss 62 has a male push rod 84 that extends and retracts along its length at its end; the female groove 72 has a female push rod 94 that extends and retracts along its length at its end; one end of the male push rod 84 abuts against one end of the female push rod 94; the other end of the male push rod 84 protrudes into the male lifting groove 81 and abuts against the male baffle 82; one end of the female push rod 94 abuts against one end of the male push rod 84; the other end of the female push rod 94 protrudes into the female lifting groove 91 and abuts against the female baffle 92. In this embodiment, the combined aluminum electrolytic capacitor also includes a first male driving slope 85 at the other end of the male push rod 84; a second male driving slope 86 that mates with the first male driving slope 85 on the side of the male baffle 82; a first female driving slope 95 at the other end of the female push rod 94; and a second female driving slope 96 that mates with the first female driving slope 95 on the side of the female baffle 92.

[0037] Specifically, during the process of the male protrusion 62 being inserted into the female groove 72, the male push rod 84 and the female push rod 94 push against each other to generate axial displacement. Through the cooperation of the first male driving inclined surface 85 and the second male driving inclined surface 86, the axial thrust is converted into the vertical lifting force of the male baffle 82, realizing the automatic opening of the male channel 61 without additional manual operation. Similarly, through the cooperation of the first female driving inclined surface 95 and the second female driving inclined surface 96, the axial thrust is converted into the vertical lifting force of the female baffle 92, realizing the automatic opening of the female channel 71 without additional manual operation, thereby realizing the connection between the male channel 61 and the female channel 71.

[0038] The manufacturing process of a combined aluminum electrolytic capacitor described in this embodiment includes the following steps: S1. Place the liquid bladder 22 filled with thermally expanding liquid on the lower end cap 3; S2. The electrode assembly 5 is wrapped around the outer periphery of the liquid bladder 22; S3. Assemble the bottom of the outer shell 2 with the lower end cover 3, so that the electrode assembly 5 and the liquid bladder 22 are located inside the outer shell 2; S4. Pour electrolyte between the outer casing 2 and the lower end; S5. Assemble the top of the outer casing 2 with the upper end cover 4 to form the capacitor unit 1; S6. Assemble multiple capacitor cells 1 together according to actual needs.

[0039] This embodiment breaks down the traditional roll-type core into multiple independent capacitor cells 1, which are then combined as needed via male connector 6 and female connector 7. Each capacitor cell 1 can be produced and tested independently, and defective capacitor cells 1 can be replaced individually, avoiding overall scrapping. This solves the problem of insufficient mechanical stability caused by the excessive thickness of the traditional roll-type core, while also enabling modular testing and maintenance, improving testing efficiency, and reducing production cost waste caused by local defects. The number of capacitor cells 1 can be flexibly combined according to actual capacity requirements to adapt to different power and capacity scenarios, balancing large capacity requirements with miniaturized design, and broadening the product's application range.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A combined aluminum electrolytic capacitor, characterized in that: It includes multiple capacitor cells (1); the multiple capacitor cells (1) are detachably connected to each other; Each capacitor cell (1) includes a housing (2), a lower end cap (3) located at the bottom of the housing (2), and an upper end cap (4) located at the top of the housing (2); a receiving cavity (21) is formed between the housing (2), the lower end cap (3), and the upper end cap (4); an electrode assembly (5) and an electrolyte are provided in the receiving cavity (21); The accommodating cavity (21) is provided with a liquid bladder (22); the liquid bladder (22) is filled with a thermally expanding liquid; One end of the upper cover (4) is provided with a male connection part (6); the other end of the upper cover (4) is provided with a female connection part (7); the male connection part (6) and the female connection part (7) are detachably connected; the male connection part (6) is provided with a male channel (61) communicating with the accommodating cavity (21); the female connection part (7) is provided with a female channel (71) communicating with the accommodating cavity (21); the male connection part (6) is provided with a male blocking component for blocking the male channel (61); the female connection part (7) is provided with a female blocking component for blocking the female channel (71).

2. The combined aluminum electrolytic capacitor according to claim 1, characterized in that: The liquid bladder (22) has a cylindrical structure; the liquid bladder (22) is located at the center of the accommodating cavity (21).

3. A combined aluminum electrolytic capacitor according to claim 2, characterized in that: The electrode assembly (5) is formed by stacking an anode aluminum foil (51), a first diaphragm (52), a cathode aluminum foil (53), and a second diaphragm (54) in sequence; the electrode assembly (5) is wrapped around the liquid bladder (22).

4. A combined aluminum electrolytic capacitor according to claim 1, characterized in that: One end of the lower end cover (3) is provided with a lower boss (31); the other end of the lower end cover (3) is provided with a lower groove (32) that cooperates with the lower boss (31).

5. A combined aluminum electrolytic capacitor according to claim 1, characterized in that: The female connecting part (7) is provided with a female groove (72); the male connecting part (6) is provided with a male boss (62) that mates with the female groove (72); the female groove (72) and the male boss (62) are detachably connected.

6. A combined aluminum electrolytic capacitor according to claim 5, characterized in that: The female groove (72) has a fixing groove (73) on its side wall; the male boss (62) has a fixing pin (63) that mates with the fixing groove (73) on its side wall; the fixing pin (63) is telescopically movably located on the side wall of the male boss (62); a fixing spring is provided between the fixing pin (63) and the male boss (62); The end of the fixing pin (63) is provided with a conical surface (65).

7. A combined aluminum electrolytic capacitor according to claim 5, characterized in that: The male connection part (6) is provided with a male lifting groove (81) extending along the height direction; the male lifting groove (81) is connected to the male channel (61); the male blocking assembly includes a male baffle (82) that is movably mounted on the male lifting groove (81); the male baffle (82) protrudes into the male channel (61); a male spring (83) is provided between the bottom of the male baffle (82) and the male lifting groove (81); The female connecting part (7) is provided with a female lifting groove (91) extending along the height direction; the female lifting groove (91) is connected to the female channel (71); the female blocking assembly includes a female baffle (92) that is movably mounted on the female lifting groove (91); the female baffle (92) protrudes into the female channel (71); a female spring (93) is provided between the bottom of the female baffle (92) and the female lifting groove (91).

8. A combined aluminum electrolytic capacitor according to claim 7, characterized in that: The male protrusion (62) is provided with a male push rod (84) that extends and retracts along the length direction at its end; the female groove (72) is provided with a female push rod (94) that extends and retracts along the length direction at its end; One end of the male push rod (84) is used to abut against one end of the female push rod (94); the other end of the male push rod (84) protrudes into the male lifting groove (81) and abuts against the male baffle (82); One end of the female push rod (94) is used to abut against one end of the male push rod (84); the other end of the female push rod (94) protrudes into the female lifting groove (91) and abuts against the female baffle (92).

9. A combined aluminum electrolytic capacitor according to claim 8, characterized in that: The male push rod (84) has a first male driving ramp (85) at one end; the male baffle (82) has a second male driving ramp (86) on its side that cooperates with the first male driving ramp (85); the female push rod (94) has a first female driving ramp (95) at one end; the female baffle (92) has a second female driving ramp (96) on its side that cooperates with the first female driving ramp (95).

10. A manufacturing process for a combined aluminum electrolytic capacitor based on any one of claims 1-9, characterized in that: Includes the following steps: S1. Place the liquid bladder (22) filled with thermally expanding liquid on the lower end cap (3); S2. The electrode assembly (5) is wrapped around the outer periphery of the liquid bladder (22); S3. Assemble the bottom of the outer shell (2) with the lower end cap (3) so that the electrode assembly (5) and the liquid bladder (22) are located inside the outer shell (2); S4. Pour electrolyte between the outer casing (2) and the lower end; S5. Assemble the top of the outer shell (2) with the upper end cover (4) to form a capacitor cell (1); S6. Assemble multiple capacitor cells (1) together according to actual needs.

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