Stacking method of laminated aluminum capacitor

Abstract

The invention discloses a stacking method of a laminated aluminum capacitor, and belongs to the technical field of aluminum capacitors. The method comprises the following steps of: 1, welding a row aluminum core at the bottom of a steel bar; step 2, positioning and mounting the row aluminum cores with the steel bars, the row aluminum cores without the steel bars and row gaskets on a stacking and curing jig for lamination, and preparing row core packages; the step 2, positioning and mounting the row aluminum cores with the steel bars, the row aluminum cores without the steel bars and the row gaskets on the stacking and curing jig for lamination; step 3, cutting off the steel bars on the row core cladding; and step 4, sequentially positioning and installing one row of core cladding, the lead frame and the other row of core cladding on a stacking and curing jig for lamination and bonding, thereby completing the preparation work of a plurality of laminated aluminum capacitors. The row aluminum cores with the steel bars, the row aluminum cores without the steel bars and the row gaskets are positioned and mounted on the stacking and curing jig to be laminated, so that synchronous stacking and manufacturing of a plurality of core packages are realized, the stacking uniformity of the aluminum cores and the gaskets is improved, and the production efficiency of the core packages is remarkably improved.

Description

Technical Field

[0001] The invention relates to a stacking method for laminated aluminum capacitors, belonging to the technical field of aluminum capacitors. Background Art

[0002] The laminated aluminum capacitor is a solid aluminum electrolytic capacitor made of metal aluminum without electrolyte. Because it uses metal aluminum as the substrate anode, aluminum oxide as the dielectric, and conductive polymer as the cathode, and is encapsulated by epoxy resin, it can not only resist mechanical stress, but also adapt to high and low temperature working environments. During the working process, the laminated aluminum capacitor has the performance of automatically repairing or isolating the defects in the oxide film, so that the oxide film medium can be reinforced and restored to its proper insulation performance at any time without continuous cumulative damage. This unique self-healing performance ensures its advantages of long life and high reliability. The laminated aluminum capacitor has a very high working electric field strength, and has the characteristics of excellent performance and light weight. Therefore, the laminated aluminum capacitor has been rapidly developed. With the increasing application scope of laminated aluminum capacitors, it has not only been widely used in industrial control, film and television equipment, communication instruments and other fields, but also gradually used in military communications, aerospace and other fields.

[0003] Among them, stacking is the key process or core process in the manufacturing process of laminated aluminum capacitors. The positive electrode of the aluminum core of the product is connected to the positive electrode lead by welding and led out, and the cathode silver paste is bonded and led out by the negative electrode lead. Because the negative end is covered with PEDOT, carbon layer, and silver layer, the thickness difference between the positive and negative electrodes causes the aluminum foil to produce bending internal stress. As the number of stacked layers increases, this bending stress will be further amplified, and in severe cases, the Al 2 O 3 Cracks appear in the dielectric oxide film, which eventually leads to increased leakage or short circuit breakdown of the laminated aluminum capacitor. To solve this problem, the common method currently used in the industry is: for products with more than 4 layers of stacking, gaskets are added at the anode welding position to ensure the flatness and welding strength of the aluminum core when stacking, so that the product parameters meet the process requirements.

[0004] However, for products with more than 4 layers, the stacking method often used is to add a gasket to the positive electrode and laser weld it layer by layer. The production efficiency is low, and the spot welding positioning accuracy of the positive gasket is poor, resulting in the U-shaped pressing block causing the positive aluminum foil to bend and deform severely during laser welding. At the same time, the thermal stress and welding slag generated by layer-by-layer laser welding will damage the cathode layer, such as the polymer layer and the oxide film layer peeling off, and the welding slag contaminating the silver paste layer, which ultimately leads to increased product leakage current or short circuit breakdown failure. Therefore, it is necessary to further improve the stacking method and internal structure of the laminated aluminum capacitor.

[0005] The Chinese patent document with the publication number CN119446791A discloses an aluminum capacitor and its stacking method, including the following steps: preparing a single-layer capacitor monomer on a raw material piece, removing defective single-layer capacitor monomers, cutting the qualified single-layer capacitor monomers from the raw material piece and transferring them to a lamination jig, performing negative electrode bonding and then laminating, welding the positive electrodes between the single-layer capacitor monomers and on an auxiliary frame, curing the negative electrodes of the single-layer capacitor monomers to obtain a laminated body, then impregnating the negative electrode of the laminated body, assembling the laminated body to a frame lead, welding the positive electrode area of the laminated body to the frame lead, connecting the negative electrode of the laminated body and the frame lead, and cutting off the redundant part of the auxiliary frame to complete the lamination preparation. The used lamination auxiliary frame also has the function of a positive electrode gasket, which can effectively reduce the height difference between the positive and negative electrodes of a single-chip capacitor unit. The lamination auxiliary frame can be integrally impregnated with conductive paste after lamination, enhancing the connection between the negative electrode units of the capacitor and reducing the equivalent series resistance.

[0006] However, the above lamination method still has the following deficiencies: after preparing a single-layer capacitor monomer on a raw material piece, it is necessary to cut the single-layer capacitor monomer from the raw material piece, and then stack multiple single-layer capacitor monomers separately to form a laminated body, which greatly reduces the production efficiency of the laminated body. Summary of the Invention

[0007] To solve the above technical problems, the present invention provides a stacking method for laminated aluminum capacitors.

[0008] The present invention is achieved through the following technical solutions:

[0009] A stacking method for laminated aluminum capacitors includes the following steps:

[0010] Step 1: Weld a row of aluminum cores at the bottom of a steel bar;

[0011] Step 2: According to the stacking requirements, position and install the row of aluminum cores with the steel bar, the row of aluminum cores without the steel bar, and the row of gaskets on a stacking and curing jig for lamination, then weld the positive electrodes of all the upper and lower row of aluminum cores and the row of gaskets together at one time, and perform high-temperature curing on the negative electrode silver paste of all the upper and lower row of aluminum cores to obtain a row of core packs;

[0012] Step 3: Cut off the steel bar on the row of core packs;

[0013] Step 4: Sequentially position and install the row of core packs, the lead frame, and another row of core packs on a stacking and curing jig for lamination and bonding, and then cut off the redundant parts on the row of aluminum cores, the row of gaskets, and the lead frame to complete the preparation of multiple laminated aluminum capacitors.

[0014] The stacked curing fixture includes a base, a sliding seat, a support plate, and a curing press block. Two guide rods are arranged side by side on the base. The sliding seat is slidably connected to the base. The support plate is arranged on the sliding seat. A row of positioning pins is arranged on the top of the sliding seat. The positioning pins penetrate through the support plate, and the upper ends of the positioning pins extend above the support plate. The curing press block is located above the support plate and is slidably connected to the two guide rods.

[0015] The cross-sectional shape of the base is convex.

[0016] The sliding seat includes a sliding seat body. A rectangular groove is longitudinally opened at the bottom of the sliding seat body. A row of support blocks B and a row of support blocks A are arranged longitudinally on the top of the sliding seat body.

[0017] One side surface of the support plate is in contact with one side surface of the support block A. The support block A is located between the support block B and the support plate, and the top surfaces of the support block A, the support block B, and the support plate are coplanar.

[0018] The curing press block includes a press block body. A row of pressing strips is longitudinally arranged at the bottom of the press block body, and the arrangement positions of the pressing strips correspond to the arrangement positions of the support blocks B and the support blocks A. A positioning hole C is opened at the bottom of the press block body at a position corresponding to the positioning pins, and a guide hole is opened at a position corresponding to the guide rods.

[0019] The row of aluminum cores includes an aluminum foil auxiliary frame. A positioning hole A is arranged on the aluminum foil auxiliary frame at a position corresponding to the positioning pins. A row of aluminum foil substrates is integrally formed with one side of the aluminum foil auxiliary frame. A cathode layer is arranged on the aluminum foil substrate to form the aluminum core.

[0020] The row of gaskets includes a gasket auxiliary frame. A positioning hole B is arranged on the gasket auxiliary frame at a position corresponding to the positioning pins. A row of gaskets is integrally formed with one side of the gasket auxiliary frame.

[0021] The method of positioning and installing the row of aluminum cores with strip steel, the row of aluminum cores without strip steel, and the row of gaskets on the stacked curing fixture for lamination according to the stacking requirements in step two includes the following steps:

[0022] Step A: Use the positioning hole A on the row of aluminum cores and the positioning pins on the top of the sliding seat for positioning, and position and install the row of aluminum cores with strip steel on the support plate.

[0023] Step B: Use the positioning hole A and the positioning pins for positioning, and sequentially position and install several rows of aluminum cores without strip steel on the row of aluminum cores with strip steel to achieve positioning stacking of the row of aluminum cores.

[0024] Step C: During the positioning and stacking process of the row-connected aluminum cores, according to the stacking layers of the row-connected aluminum cores, the thickness difference between the positive and negative electrodes of the row-connected aluminum cores, and the thickness of the row-connected gaskets, and using the positioning holes B and the positioning pins for positioning, position and place the row-connected gaskets on any row-connected aluminum core in Step A and Step B, so as to reduce or eliminate the thickness difference between the positive and negative electrodes of the row-connected core package through the row-connected gaskets.

[0025] In Step 2, before the high-temperature curing of the negative silver paste of all the upper and lower row-connected aluminum cores, first move the curing press block downward along the guide rod until the curing press block cooperates with the support block A and the support block B to clamp all the row-connected aluminum cores and the row-connected gaskets, so as to ensure that the thickness of each core package in the row-connected core package remains consistent after high-temperature curing through the gravity of the curing press block.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. Position and install the row-connected aluminum cores with strip steel, the row-connected aluminum cores without strip steel, and the row-connected gaskets on the stacking and curing fixture for lamination, realizing the synchronous stacking and production of multiple core packages, improving the stacking neatness of the aluminum cores and gaskets, and significantly improving the production efficiency of the core packages.

[0028] 2. Using the row-connected method of positioning and laminating the row-connected aluminum cores and the row-connected gaskets by the stacking and curing fixture can ensure that the upper and lower layer aluminum cores and gaskets do not shift during the subsequent welding of the positive electrodes of the upper and lower row-connected aluminum cores and the row-connected gaskets, and the high-temperature curing of the negative silver paste of the upper and lower row-connected aluminum cores, and can effectively alleviate the bending and deformation of the positive aluminum foil during the stacking and welding process of the core packages. Step

[0029] 3. In Step 4, using the positioning pins, the positioning holes A and B on the row-connected core package, and the positioning hole D on the lead frame, position and laminate the row-connected core package and the lead frame on the stacking and curing fixture, realizing the purpose of synchronously bonding the lead frames of multiple core packages, and ensuring that the lead frame will not be misaligned relative to the core package, improving the bonding efficiency of the lead frame and the side neatness of the laminated aluminum electrolytic capacitor, and greatly reducing the risk of die pressing and leakage sealing of the product.

[0030] 4. The stacking and curing fixture can be used not only for the positioning and stacking of the row-connected aluminum cores and the row-connected gaskets, but also for the high-temperature curing of the negative silver paste of the upper and lower row-connected aluminum cores, and can also be used for the positioning, stacking and bonding of the row-connected core package and the lead frame, realizing the multi-purpose of one fixture and having strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the row-connected aluminum core with strip steel of the present invention;

[0032] Figure 2 It is a schematic structural diagram of the row-connected aluminum core of the present invention;

[0033] Figure 3 Structural schematic diagram of the row-connected gasket of the present invention;

[0034] Figure 4 Structural schematic diagram of the stacking and curing fixture of the present invention;

[0035] Figure 5 is Figure 4 Structural schematic diagram from another perspective;

[0036] Figure 6 Structural schematic diagram of the sliding seat of the present invention;

[0037] Figure 7 Structural schematic diagram of the curing pressing block of the present invention;

[0038] Figure 8 Structural schematic diagram when the row-connected aluminum cores with steel strips, row-connected aluminum cores without steel strips and row-connected gaskets of the present invention are stacked on the stacking and curing fixture;

[0039] Figure 9 is Figure 8 Structural schematic diagram from another perspective;

[0040] Figure 10 Structural schematic diagram of the lead frame of the present invention;

[0041] Figure 11 Structural schematic diagram when the row-connected core package and the lead frame of the present invention are bonded on the stacking and curing fixture.

[0042] In the figure: 1 - steel strip, 2 - row-connected aluminum core, 20 - aluminum foil auxiliary frame, 200 - positioning hole A, 21 - aluminum foil base material, 3 - row-connected gasket, 30 - gasket auxiliary frame, 300 - positioning hole B, 31 - gasket, 4 - stacking and curing fixture, 40 - base, 41 - sliding seat, 410 - sliding seat body, 411 - support block A, 412 - support block B, 413 - rectangular groove, 42 - support plate, 43 - positioning pin, 44 - curing pressing block, 440 - pressing block body, 441 - pressing strip, 442 - positioning hole C, 443 - guiding hole, 45 - guiding rod, 5 - row-connected core package, 6 - lead frame, 60 - positioning hole D. Detailed implementation manners

[0043] The technical solution of the present invention will be further described below, but the scope of protection claimed is not limited thereto.

[0044] As Figures 1 to 11 shown, a stacking method for laminated aluminum capacitors according to the present invention includes the following steps:

[0045] Step 1, weld the row-connected aluminum core 2 at the bottom of the steel strip 1;

[0046] Step 2: According to the stacking requirements, position and install the row-connected aluminum cores 2 with strip steel 1, the row-connected aluminum cores 2 without strip steel 1, and the row-connected gaskets 3 on the stacking and curing fixture 4 for lamination. Then, weld the positive electrodes of all the upper and lower row-connected aluminum cores 2 and the row-connected gaskets 3 together at one time, and perform high-temperature curing on the negative silver paste of all the upper and lower row-connected aluminum cores 2 to obtain the row-connected core pack 5;

[0047] Step 3: Cut off the strip steel 1 on the row-connected core pack 5;

[0048] Step 4: Sequentially position and install the row-connected core pack 5, the lead frame 6, and another row-connected core pack 5 on the stacking and curing fixture 4 for lamination and bonding. Then, cut off the redundant parts on the row-connected aluminum cores 2, the row-connected gaskets 3, and the lead frame 6, and the preparation of multiple stacked aluminum capacitors can be completed.

[0049] During use, the strength and stiffness of the bottom row-connected aluminum core 2 are improved through the strip steel 1. After the row-connected core pack 5 is obtained, it is convenient to take out the row-connected core pack 5 from the stacking and curing fixture 4 through the strip steel 1. The core pack is formed by parallel connection of multiple layers of aluminum cores, that is, the positive electrodes of the aluminum cores are connected to each other, and the negative electrodes are connected to each other.

[0050] Positioning and installing the row-connected aluminum cores 2 with strip steel 1, the row-connected aluminum cores 2 without strip steel 1, and the row-connected gaskets 3 on the stacking and curing fixture 4 for lamination, compared with the prior art with the publication number CN119446791A, omits a large amount of cutting work of cutting the aluminum cores one by one from the aluminum foil auxiliary frame 20, realizes synchronous stacking and production of multiple core packs, improves the stacking neatness of the aluminum cores and the gaskets 31, and significantly improves the production efficiency of the core pack. The row arrangement method of positioning and laminating the row-connected aluminum cores 2 and the row-connected gaskets 3 by using the stacking and curing fixture 4 can ensure that the upper and lower aluminum cores and the gaskets 31 do not shift during the subsequent welding of the positive electrodes of the upper and lower row-connected aluminum cores 2 and the row-connected gaskets 3, and the high-temperature curing of the negative silver paste of the upper and lower row-connected aluminum cores 2, and can effectively alleviate the bending deformation of the positive aluminum foil during the stacking and welding of the core pack. In Step 4, by using the positioning pins 43, the positioning holes A200 and the positioning holes B300 on the row-connected core pack 5, and the positioning holes D60 on the lead frame 6, the row-connected core pack 5 and the lead frame 6 are positioned and laminated on the stacking and curing fixture 4, realizing the purpose of synchronously bonding the lead frame 6 to multiple core packs, and ensuring that the lead frame 6 will not be misaligned relative to the core pack, improving the bonding efficiency of the lead frame 6 and the side neatness of the stacked aluminum capacitor, and greatly reducing the risk of die pressing and leakage sealing of the product.

[0051] The stacking and curing fixture 4 can be used not only for positioning and stacking the row-connected aluminum cores 2 and the row-connected gaskets 3, but also for high-temperature curing of the negative silver paste of the upper and lower row-connected aluminum cores 2, and can also be used for positioning and stacking and bonding the row-connected core pack 5 and the lead frame 6, realizing multiple uses of one fixture and having strong practicability.

[0052] The stacked curing fixture 4 includes a base 40, a sliding seat 41, a support plate 42, and a curing press block 44. Two guide rods 45 are arranged side by side on the base 40. The sliding seat 41 is slidably connected to the base 40. The support plate 42 is arranged on the sliding seat 41. A row of positioning pins 43 is arranged on the top of the sliding seat 41. The positioning pins 43 penetrate through the support plate 42, and the upper ends of the positioning pins 43 extend above the support plate 42. The curing press block 44 is located above the support plate 42 and is slidably connected to the two guide rods 45.

[0053] The cross-sectional shape of the base 40 is convex. During use, the protrusion on the top of the base 40 is slidably connected to the rectangular groove 413 at the bottom of the sliding seat body 410.

[0054] The sliding seat 41 includes a sliding seat body 410. A rectangular groove 413 is longitudinally opened at the bottom of the sliding seat body 410. A row of support blocks B412 and a row of support blocks A411 are arranged longitudinally on the top of the sliding seat body 410. During use, a screw is threadedly connected to one side of the rectangular groove 413 on the sliding seat body 410, which is convenient for tightening the screw to lock and fix the sliding seat body 410 on the base 40.

[0055] One side surface of the support plate 42 is in contact with one side surface of the support block A411. The support block A411 is located between the support block B412 and the support plate 42, and the top surfaces of the support block A411, the support block B412, and the support plate 42 are coplanar. During use, the positive electrode of the aluminum core or core package is supported by the support block A411, the negative electrode of the aluminum core or core package is supported by the support block B412, and the aluminum foil auxiliary frame 20, the gasket auxiliary frame 30, the steel strip 1, etc. are supported by the support plate 42.

[0056] The curing press block 44 includes a press block body 440. A row of pressing strips 441 is longitudinally arranged at the bottom of the press block body 440, and the arrangement positions of the pressing strips 441 correspond to the arrangement positions of the support blocks B412 and the support blocks A411. A positioning hole C442 is opened at the bottom of the press block body 440 at a position corresponding to the positioning pins 43, and a guide hole 443 is opened at a position corresponding to the guide rods 45.

[0057] The row of aluminum cores 2 includes an aluminum foil auxiliary frame 20. A positioning hole A200 is arranged on the aluminum foil auxiliary frame 20 at a position corresponding to the positioning pins 43. A row of aluminum foil substrates 21 is integrally formed with the aluminum foil auxiliary frame 20 on one side of the aluminum foil auxiliary frame 20. A cathode layer is provided on the aluminum foil substrates 21 to form aluminum cores. During use, the cathode layer includes a dielectric layer, a conductive polymer layer, a conductive graphite layer, a conductive silver paste layer, etc. The preparation process of the cathode layer is prior art and will not be elaborated here.

[0058] The row-connected gasket 3 includes a gasket auxiliary frame 30. A positioning hole B300 is provided on the gasket auxiliary frame 30 at a position corresponding to the positioning pin 43. A row of gaskets 31 is integrally formed on one side of the gasket auxiliary frame 30. During use, the width of the gasket 31 is the same as the width of the aluminum foil substrate 21.

[0059] A positioning hole D60 is provided on the lead frame 6 at a position corresponding to the positioning pin 43.

[0060] The method in step two of positioning and installing the row-connected aluminum cores 2 of the strip steel 1, the row-connected aluminum cores 2 without the strip steel 1, and the row-connected gaskets 3 onto the stacking and curing fixture 4 according to the stacking requirements for lamination includes the following steps:

[0061] Step A: Use the positioning hole A200 on the row-connected aluminum core 2 and the positioning pin 43 on the top of the slide block 41 for positioning, and position and install the row-connected aluminum core 2 of the strip steel 1 onto the support plate 42.

[0062] Step B: Use the positioning hole A200 and the positioning pin 43 for positioning, and sequentially position and install several row-connected aluminum cores 2 without the strip steel 1 onto the row-connected aluminum core 2 of the strip steel 1 to achieve the positioning stacking of the row-connected aluminum cores 2.

[0063] During the positioning stacking process of the row-connected aluminum cores 2, according to the stacking layers of the row-connected aluminum cores 2, the positive and negative thickness difference of the row-connected aluminum cores 2, and the thickness of the row-connected gasket 3, and use the positioning hole B300 and the positioning pin 43 for positioning, and position and place the row-connected gasket 3 on any of the row-connected aluminum cores 2 in step A and step B, so as to reduce or eliminate the positive and negative thickness difference of the row-connected core package 5 through the row-connected gasket 3.

[0064] In the case of positioning using the positioning pin 43, the row-connected aluminum core 2 with the positioning hole A200 and the row-connected gasket 3 with the positioning hole B300 are used for in-situ synchronous grouping. During the grouping process, the gasket 31 is directly welded to the positive electrode of the aluminum core. Compared with the traditional grouping method of adding the gasket 31 during the stacking of the aluminum cores and performing layer-by-layer welding, the process of separately welding the gasket 31 is omitted, greatly improving the production efficiency of the core package stacking. Moreover, since the width of the gasket 31 is the same as the width of the aluminum foil substrate 21, it can effectively alleviate the bending deformation of the positive aluminum foil substrate 21 during the welding process of the core package stacking.

[0065] After the row-connected aluminum cores 2 and row-connected gaskets 3 are positioned and stacked on the stacking and curing fixture 4, the positive electrodes of all the upper and lower row-connected aluminum cores 2 and the row-connected gaskets 3 are welded together at one time. Compared with the traditional method of realizing stacking by welding the aluminum cores and gaskets 31 layer by layer one by one, the one-time welding can effectively reduce the damage to the product caused by thermal stress during the welding process, and at the same time greatly improve the production efficiency of the first-in-first-out stacking and the neatness of the core package.

[0066] In the second step, before the high-temperature curing of the negative silver paste of all the upper and lower row-connected aluminum cores 2, the curing press block 44 is first moved down along the guide rod 45 until the curing press block 44 cooperates with the support block A411 and the support block B412 to clamp all the row-connected aluminum cores 2 and the row-connected gaskets 3, so as to ensure that the thickness of each core package in the row-connected core package 5 remains the same after high-temperature curing by the gravity of the curing press block 44.

[0067] In addition, during the process of bonding the row-connected core package 5 and the lead frame 6 in the fourth step, the curing press block 44 is also moved down along the guide rod 45 until the curing press block 44 cooperates with the support block A411 and the support block B412 to clamp all the row-connected core packages 5 and the lead frames 6, so as to ensure that the thickness of all the core packages remains the same after bonding the lead frames 6 by the gravity of the curing press block 44. Compared with the traditional method of realizing stacking by welding the aluminum cores and gaskets 31 layer by layer one by one, the synchronous bonding of multiple core packages to the lead frame improves the neatness of the side of the stacked aluminum capacitor and greatly reduces the risk of die pressing and leakage sealing of the product.

Claims

1. A method for stacking a laminated aluminum capacitor, characterized in that: The following steps are involved: Step 1: Welding a row of aluminum cores (2) at the bottom of the steel bar (1); Step 2: According to the stacking requirements, the stacked aluminum core (2) with the steel bar (1), the stacked aluminum core (2) without the steel bar (1) and the stacked gasket (3) are positioned and installed on the stacking curing fixture (4) for stacking, and then the positive electrodes and the stacked gaskets (3) of all the upper and lower stacked aluminum cores (2) are welded together at one time, and the negative electrode silver paste of all the upper and lower stacked aluminum cores (2) is cured at high temperature to obtain the stacked core package (5); Step 3, cutting off the steel strips (1) on the row core package (5); Step 4: sequentially position and install the row core package (5), the lead frame (6), and another row core package (5) on the stacking curing jig (4) for lamination and bonding, and then cut off the excess parts of the row aluminum core (2), the row gasket (3), and the lead frame (6), thereby completing the preparation of multiple stacked aluminum capacitors.

2. The method for stacking a laminated aluminum capacitor according to claim 1, wherein: The stacking curing jig (4) comprises a base (40), a slide (41), a support plate (42) and a curing pressing block (44); two guide rods (45) are arranged side by side on the base (40); the slide (41) is slidably connected to the base (40); the support plate (42) is arranged on the slide (41); a row of positioning pins (43) are arranged on the top of the slide (41); the positioning pins (43) penetrate the support plate (42), and the upper ends of the positioning pins (43) extend above the support plate (42); the curing pressing block (44) is located on the upper side of the support plate (42) and is slidably connected to the two guide rods (45).

3. The method for stacking a laminated aluminum capacitor according to claim 2, wherein: The cross-section of the base (40) is in the shape of a convex letter "U".

4. The method for stacking a laminated aluminum capacitor according to claim 3, wherein: The slide seat (41) comprises a slide seat body (410), the bottom of the slide seat body (410) is provided with a rectangular groove (413) in the longitudinal direction, and the top of the slide seat body (410) is provided with a row of support blocks B (412) and a row of support blocks A (411) in the longitudinal direction.

5. The method for stacking a laminated aluminum capacitor according to claim 4, wherein: One side surface of the support plate (42) contacts one side surface of the support block A (411), the support block A (411) is located between the support block B (412) and the support plate (42), and the top surface of the support block A (411), the top surface of the support block B (412) and the top surface of the support plate (42) are coplanar.

6. The method for stacking a laminated aluminum capacitor according to claim 5, wherein: The solidifying pressing block (44) comprises a pressing block body (440), the bottom of the pressing block body (440) is provided with a row of pressing strips (441) in the longitudinal direction, and the setting position of the pressing strips (441) corresponds to the setting position of the support block B (412) and the support block A (411), and the bottom of the pressing block body (440) is provided with a positioning hole C (442) at a position corresponding to the positioning pin (43), and a guide hole (443) at a position corresponding to the guide rod (45).

7. The method for stacking a laminated aluminum capacitor according to claim 6, wherein: The row of aluminum cores (2) comprises an aluminum foil auxiliary frame (20), a positioning hole A (200) is provided on the aluminum foil auxiliary frame (20) at a position corresponding to the positioning pin (43), and a row of aluminum foil substrates (21) is integrally formed with the aluminum foil auxiliary frame (20) on one side of the aluminum foil auxiliary frame (20); a cathode layer is provided on the aluminum foil substrate (21) to form an aluminum core.

8. The method for stacking a laminated aluminum capacitor according to claim 7, wherein: The row of gaskets (3) comprises a gasket auxiliary frame (30), a positioning hole B (300) is provided on the gasket auxiliary frame (30) at a position corresponding to the positioning pin (43), and a row of gaskets (31) is integrally formed with the gasket auxiliary frame (30) on one side of the gasket auxiliary frame (30).

9. The method for stacking a laminated aluminum capacitor according to claim 8, wherein: In the step 2, according to the stacking requirements, the method of positioning and installing the row aluminum core (2) with steel bars (1), the row aluminum core (2) without steel bars (1) and the row gasket (3) on the stacking and curing jig (4) for lamination comprises the following steps: Step A, using the positioning hole A (200) on the row aluminum core (2) and the positioning pin (43) on the top of the slide seat (41) for positioning, the row aluminum core (2) with the steel strip (1) is positioned and installed on the support plate (42); Step B, using the positioning hole A (200) and the positioning needle (43) to position and sequentially position and install a plurality of row aluminum cores (2) without steel bars (1) onto the row aluminum cores (2) with steel bars (1), thereby achieving the positioning and stacking of the row aluminum cores (2); Step C: During the positioning and stacking process of the row aluminum cores (2), the row gasket (3) is positioned on any row aluminum core (2) in step A and step B according to the number of stacked layers of the row aluminum cores (2), the difference in thickness between the positive and negative electrodes of the row aluminum cores (2), and the thickness of the row gasket (3), and positioning is performed using positioning holes B (300) and positioning needles (43), so that the row gasket (3) is positioned and placed on any row aluminum core (2) in step A and step B, so as to reduce or eliminate the difference in thickness between the positive and negative electrodes of the row core package (5) through the row gasket (3).

10. The method for stacking a laminated aluminum capacitor according to claim 9, wherein: In the second step, before high-temperature curing of the negative electrode silver paste of all the upper and lower layered aluminum cores (2), the curing pressing block (44) is first moved downward along the guide rod (45) until the curing pressing block (44) cooperates with the support block A (411) and the support block B (412) to clamp all the row aluminum cores (2) and the row gaskets (3), so as to ensure that the thickness of each core package in the row core package (5) remains consistent after high-temperature curing through the gravity of the curing pressing block (44).

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