Ultrahigh-voltage high-capacity non-solid electrolyte tantalum capacitor and manufacturing method thereof

Abstract

The invention discloses an ultrahigh-voltage high-capacity non-solid electrolyte tantalum capacitor and a manufacturing method thereof, and the capacitor is characterized in that a combined tantalum capacitor is arranged in a metal housing, one end of a negative electrode outgoing line is electrically connected with the negative electrode of the combined tantalum capacitor, and the other end of the negative electrode outgoing line is led out of the metal housing from a second wire outlet hole provided with an insulating pad; an insulating film is arranged on the inner wall of the metal shell; heat-conducting epoxy resin is encapsulated in a space outside the combined tantalum capacitor in the metal shell to fix the whole combined tantalum capacitor; the sealing cover is hermetically arranged on the opening of the metal shell; one end of the positive electrode outgoing line is electrically connected with the positive electrode of the combined tantalum capacitor, and the other end of the positive electrode outgoing line is led out of the metal shell from the first wire outlet hole provided with the insulation pad. The product capacity of the capacitor with the same packaging size is improved by about 50% or the voltage is improved by 30%, and compared with an existing capacitor, the capacitor has higher voltage and larger capacitance.

Description

Technical Field

[0001] The present invention relates to the field of tantalum capacitor preparation, and in particular to an ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor and a manufacturing method thereof. Background Art

[0002] With the continuous advancement of technology, the demand for high-voltage, large-capacity tantalum capacitors continues to increase.

[0003] Currently, non-solid electrolyte tantalum capacitors have the characteristics of high withstand voltage, high energy density, and low leakage current. However, due to the breakdown voltage limit of the raw material tantalum powder, the maximum voltage can only reach 160V, and the maximum capacitance can only reach 47μF. In addition, any form of reverse voltage is prohibited for non-solid tantalum capacitors with silver shells. Since the shell is made of metallic silver, when there is a weak reverse voltage in the circuit, the silver ions in the shell will migrate to the tantalum core, increasing the leakage current of the product and causing the product to fail.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor and a manufacturing method thereof, which has a withstand voltage of more than 160V and does not cause the capacitance to decrease with the increase of the withstand voltage, thereby solving the problems that the currently used non-solid electrolyte tantalum capacitor has a withstand voltage of up to 160V and the capacitance decreases with the increase of the withstand voltage.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] An ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor, comprising:

[0008] Combined tantalum capacitor, metal casing, negative lead wire, thermal conductive epoxy resin, sealing cover, positive lead wire, first lead hole, second lead hole, insulating pad and insulating film; wherein,

[0009] The first wire outlet hole is arranged on the metal shell or the sealing cover;

[0010] The second wire outlet hole is arranged on the metal shell or the sealing cover;

[0011] Insulation pads are provided on the first wire outlet hole and the second wire outlet hole;

[0012] An insulating film is provided on the inner wall of the metal shell;

[0013] The combined tantalum capacitor is arranged in the metal shell, one end of the negative electrode lead wire is electrically connected to the negative electrode of the combined tantalum capacitor, and the other end of the negative electrode lead wire is led out of the metal shell from the second lead hole;

[0014] One end of the positive lead wire is electrically connected to the positive electrode of the combined tantalum capacitor, and the other end of the positive lead wire is led out of the metal housing through the first lead hole;

[0015] The space outside the combined tantalum capacitor in the metal shell is filled with a heat-conductive epoxy resin to fix the combined tantalum capacitor as a whole;

[0016] The sealing cover is sealingly arranged on the opening of the metal shell.

[0017] A method for manufacturing the ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor of the present invention comprises:

[0018] A combined tantalum capacitor is prepared in advance, and a positive lead wire and a negative lead wire are connected to the positive electrode and the negative electrode of the combined tantalum capacitor respectively;

[0019] Leading the connected negative electrode lead wire out of the metal housing from the second lead hole provided with an insulating pad;

[0020] Putting the combined tantalum capacitor into the metal shell, and leading the positive lead wire out of the metal shell from the first lead hole provided with an insulating pad;

[0021] A thermally conductive epoxy resin is poured into the metal shell to be cured. Before curing, a sealing cover is added to the opening of the metal shell to seal the thermally conductive epoxy resin in the metal shell and the overall assembled tantalum capacitor. After the thermally conductive epoxy resin is completely cured, the ultra-high voltage and large-capacity non-solid electrolyte tantalum capacitor is obtained through testing and screening, printing, finished product measurement, packaging, and warehousing inspection.

[0022] Compared with the prior art, the ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor and the manufacturing method thereof provided by the present invention have the following beneficial effects:

[0023] By adopting combined tantalum capacitors, large capacity and high withstand voltage are guaranteed. When a combination of all tantalum capacitors is used for combined tantalum capacitors, it can withstand a reverse voltage of 3V. When a combination of tantalum capacitors is used with a combination of non-solid electrolyte tantalum capacitors encapsulated in a tantalum shell, compared with conventional silver-shell non-solid electrolyte tantalum capacitors, the product has a smaller volume, higher energy density, lower leakage current, and higher reliability. The capacity of products with the same package size is increased by about 50% or the voltage is increased by 30%, and higher voltage and larger capacitance are achieved compared to existing capacitors. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of an ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor provided in an embodiment of the present invention.

[0026] Figure 2 A circuit diagram of a series-parallel hybrid combination structure of an ultra-high voltage and large-capacity non-solid electrolyte tantalum capacitor provided in an embodiment of the present invention.

[0027] Figure 3 A schematic structural diagram of a single non-solid electrolyte tantalum capacitor of the ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor provided in an embodiment of the present invention.

[0028] Figure 4 A flow chart of a method for manufacturing an ultra-high voltage, large-capacity non-solid electrolyte tantalum capacitor provided in an embodiment of the present invention.

[0029] The components corresponding to the numbers in the figure are: 1-combined tantalum capacitor; 11-tantalum core; 12-tantalum shell; 13-electrolyte; 14-cathode ring or ruthenium dioxide coating; 15-cathode lead; 16-anode lead; 17-lower pad; 18-sealing ring; 19-tantalum glass insulator; 110-sealing plug; 111-polytetrafluoroethylene insulating pad; 2-negative lead wire; 3-positive lead wire; 4-metal shell; 5-epoxy resin; 6-insulating pad; 7-insulating film. DETAILED DESCRIPTION

[0030] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in combination with the specific content of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0031] First, the terms that may be used in this article are explained as follows:

[0032] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0033] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0034] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0035] Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0036] The orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of this document.

[0037] The scheme provided by the present invention is described in detail below. The contents not described in detail in the embodiments of the present invention belong to the prior art known to professionals in the field. If the specific conditions are not specified in the embodiments of the present invention, they are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturers are not specified in the reagents or instruments used in the embodiments of the present invention, they are all conventional products that can be purchased commercially.

[0038] like Figure 1 As shown, an embodiment of the present invention provides an ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor, comprising:

[0039] Combined tantalum capacitor, metal casing, negative lead wire, thermal conductive epoxy resin, sealing cover, positive lead wire, first lead hole, second lead hole, insulating pad and insulating film; wherein,

[0040] The first wire outlet hole is arranged on the metal shell or the sealing cover;

[0041] The second wire outlet hole is arranged on the metal shell or the sealing cover;

[0042] Insulation pads are provided on the first wire outlet hole and the second wire outlet hole;

[0043] An insulating film is provided on the inner wall of the metal shell;

[0044] The combined tantalum capacitor is arranged in the metal shell, one end of the negative electrode lead wire is electrically connected to the negative electrode of the combined tantalum capacitor, and the other end of the negative electrode lead wire is led out of the metal shell from the second lead hole;

[0045] One end of the positive lead wire is electrically connected to the positive electrode of the combined tantalum capacitor, and the other end of the positive lead wire is led out of the metal housing through the first lead hole;

[0046] The space outside the combined tantalum capacitor in the metal shell is filled with a heat-conductive epoxy resin to fix the combined tantalum capacitor as a whole;

[0047] The sealing cover is sealingly arranged on the opening of the metal shell.

[0048] Preferably, the withstand voltage of the above-mentioned combined tantalum capacitor is greater than 160V, and can reach 800V or even higher; or the withstand voltage of the combined tantalum capacitor is less than or equal to 160V, and the capacity is greater than 1000μF. As the withstand voltage decreases, the capacity can reach 10000μF or even higher.

[0049] Preferably, in the above-mentioned tantalum capacitor, the combined tantalum capacitor is a combined tantalum capacitor composed of at least two non-solid electrolyte tantalum capacitors of the same specification, which are connected to each other in series, in parallel, or in a series-parallel hybrid connection through a conductor through the positive lead and the negative lead of each non-solid electrolyte tantalum capacitor. Figure 2 shown.

[0050] Preferably, in the above-mentioned tantalum capacitor, in the combined tantalum capacitor, at least one of an insulating sleeve, an insulating film, and an insulating tape is provided on the surface of at least one of the two adjacent non-solid electrolyte tantalum capacitors connected in series.

[0051] Preferably, in the above-mentioned tantalum capacitors, each non-solid electrolyte tantalum capacitor is a non-solid tantalum electrolytic capacitor encapsulated by a tantalum metal shell or a non-solid tantalum electrolytic capacitor encapsulated by a silver shell. The structure of a single non-solid tantalum electrolytic capacitor is as follows: Figure 3 shown.

[0052] Preferably, in the above tantalum capacitor, a high temperature resistant insulating film or a high temperature resistant insulating tape is provided between the combined tantalum capacitor and the metal shell, so as to ensure the insulation effect when the metal shell needs to be insulated from the shell or the negative electrode of each non-solid electrolyte tantalum capacitor of the combined tantalum capacitor.

[0053] Preferably, in the above tantalum capacitor, the insulating pad is made of polytetrafluoroethylene, which can ensure better insulation effect.

[0054] See also Figure 4 The embodiment of the present invention also provides a method for manufacturing the above-mentioned ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor, comprising:

[0055] A combined tantalum capacitor is prepared in advance, and a positive lead wire and a negative lead wire are connected to the positive electrode and the negative electrode of the combined tantalum capacitor respectively;

[0056] Leading the connected negative electrode lead wire out of the metal housing from the second lead hole provided with an insulating pad;

[0057] Putting the combined tantalum capacitor into the metal shell, and leading the positive lead wire out of the metal shell from the first lead hole provided with an insulating pad;

[0058] A thermally conductive epoxy resin is poured into the metal shell to be cured. Before curing, a sealing cover is added to the opening of the metal shell to seal the thermally conductive epoxy resin in the metal shell and the overall assembled tantalum capacitor. After the thermally conductive epoxy resin is completely cured, the ultra-high voltage and large-capacity non-solid electrolyte tantalum capacitor is obtained through testing and screening, printing, finished product measurement, packaging, and warehousing inspection.

[0059] Preferably, in the above method, the combined tantalum capacitor is pre-prepared in the following manner, including:

[0060] At least two non-solid electrolyte tantalum capacitors of the same specification are selected, and the leads of the non-solid electrolyte tantalum capacitors are connected by connecting wires through lead-tin welding to form a combined structure of a series structure, a parallel structure or a series-parallel mixed structure to form a combined structure of a combined tantalum capacitor.

[0061] Preferably, in the above method, in the combined tantalum capacitor, at least one of an insulating sleeve, an insulating film and an insulating tape is provided on the surface of at least one of the two adjacent non-solid electrolyte tantalum capacitors connected in series.

[0062] Preferably, in the above method, when the metal shell needs to be insulated from the negative electrodes of the non-solid electrolyte tantalum capacitors of the combined tantalum capacitor, a high-temperature insulating tape is pasted on the inner wall of the metal shell or a high-temperature insulating film is placed;

[0063] When the metal shell needs to be connected to the negative electrode of each non-solid electrolyte tantalum capacitor of the combined tantalum capacitor, a high-temperature insulating tape or a high-temperature insulating film is only attached to the positive end of each non-solid electrolyte tantalum capacitor.

[0064] In summary, the high-voltage and large-capacity non-solid electrolyte tantalum capacitor of the embodiment of the present invention is formed by connecting several non-solid electrolyte tantalum capacitors in series, parallel or series-parallel mixed structure through wires, and then encapsulating them in a metal shell with thermal conductive epoxy resin to form an ultra-high voltage and large-capacity combined non-solid electrolyte tantalum capacitor. When all single capacitors are combined to use all-tantalum capacitors, they can withstand a 3V reverse voltage; when non-solid electrolyte tantalum capacitors encapsulated in tantalum shells are used, compared with conventional non-solid electrolyte tantalum capacitors in silver shells, the product has a smaller volume, higher energy density, lower leakage current, and higher reliability. The capacity of products with the same package size is increased by about 50% or the voltage is increased by 30%, and higher voltage and larger capacitance are achieved compared to existing capacitors.

[0065] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the solution provided by the embodiment of the present invention is described in detail with specific embodiments below.

[0066] Example 1

[0067] like Figure 1 As shown, the embodiment provides an ultra-high voltage and large capacity non-solid tantalum electrolyte tantalum capacitor, which is a traditional non-solid electrolyte tantalum capacitor with an electrochemical capacitor cathode added, which has the characteristics of high energy density and high power of electrochemical capacitors, and also has the characteristics of high working voltage of traditional electrolytic capacitors and small volume-to-capacity ratio of tantalum capacitors. The hybrid tantalum capacitor has more perfect AC characteristics and can meet the requirements of pulse power technology. The tantalum capacitor includes: a combined tantalum capacitor, a metal shell, a thermally conductive epoxy resin, a sealing cover, a positive lead wire and a negative lead wire;

[0068] Among them, the combined tantalum capacitor is composed of multiple non-solid electrolyte tantalum capacitors and is prepared in the following way: a number of non-solid electrolyte tantalum capacitors with the same design and process are selected. For the tantalum capacitors combined in parallel, no surface insulation treatment is required. For the tantalum capacitors combined in series, at least one of the two adjacent products is subjected to surface insulation treatment (usually an insulating sleeve, or an insulating tape or insulating film).

[0069] When the metal shell needs to be insulated from the negative electrode of the tantalum capacitor, a high-temperature insulating tape is pasted on the inner wall of the metal shell or a high-temperature insulating film is placed. When the metal shell needs to be connected to the negative electrode of the tantalum capacitor, a high-temperature insulating tape or a high-temperature insulating film is only pasted on the positive end of the tantalum capacitor.

[0070] Connect the leads of each tantalum capacitor into a series structure, a parallel structure or a series-parallel structure by lead-tin welding. When a series-parallel structure is required, the series combination should be performed first and then the tantalum capacitors in the series combination should be combined in parallel. Then, the positive and negative lead wires should be connected to the positive and negative leads of the combined product respectively and the positive and negative lead wires should be passed through the center hole of the polytetrafluoroethylene insulation pad of the metal shell. Put the assembled tantalum capacitor into the metal shell; Figure 2 The circuit diagram shows that the tantalum capacitors are connected by wires to form a series-parallel combination structure.

[0071] The positive lead wire is connected to the positive electrode of the series structure or parallel structure formed after the tantalum capacitors are connected; the negative lead wire is connected to the negative electrode of the series structure or parallel structure formed after the tantalum capacitors are connected.

[0072] Pour thermally conductive epoxy resin into the metal shell to solidify it, and before solidification, add a sealing cover plate to the opening of the metal shell to seal the thermally conductive epoxy resin and the tantalum capacitors and their connecting wires in the metal shell, so that the thermally conductive epoxy resin inside is completely solidified and combined with the tantalum capacitor to form a whole, and the metal shell and the internal tantalum capacitors and their connecting wires are fixed. The positive and negative lead wires pass through the central hole of the polytetrafluoroethylene insulation pad on the reserved hole of the metal shell of the thermally conductive silicone encapsulation body and lead out of the metal shell as positive and negative lead terminals.

[0073] The several tantalum capacitors used in the above-mentioned ultra-high voltage and large-capacity non-solid electrolyte tantalum capacitors should be non-solid electrolyte tantalum capacitors of the same specification. Non-solid electrolyte tantalum capacitors of the same specification refer to that the capacity and withstand voltage of each tantalum capacitor are basically the same, and the error is within the allowable range. Each non-solid electrolyte tantalum capacitor uses a tantalum metal shell. The internal structure of a single non-solid electrolyte tantalum capacitor is as follows: Figure 3As shown, it is composed of tantalum glass insulator 19, polytetrafluoroethylene insulating pad 111 (I-shaped pad, upper pad 17, lower pad), sealing plug 110, tantalum core 11, cathode ring 14 (or ruthenium dioxide layer attached to the inner wall of tantalum shell) 14, electrolyte 13 and tantalum shell 12, anode lead 16, cathode lead 15, and sealing ring 18. This tantalum shell packaged non-solid electrolyte tantalum capacitor, especially the ruthenium dioxide layer attached to the inner wall of the tantalum shell, has the advantages of high withstand voltage, high capacitance, full sealing, low leakage current, high thermal stability, wide temperature range, high reliability, etc. compared with existing capacitors under the same packaging size. It can solve the problems of low voltage, low energy density, and excessive volume currently used.

[0074] The tantalum capacitor of the present invention is further described below in conjunction with specific embodiments.

[0075] The capacitor manufacturing process of the present invention is as follows:

[0076] according to Figure 4 In the process, each single tantalum capacitor is prepared from the pressing to the assembly step, and the assembled tantalum capacitor is subjected to aging, temperature shock, high and low temperature testing, electrical aging, sealing test and other processes. Qualified tantalum capacitors are selected and insulated on their surfaces to form an insulating layer, and are connected in series, parallel or series-parallel structure by welding through lead forming wires in a corresponding manner. Specifically, a certain length of lead is formed by a single product lead and welded with an electric soldering iron. Each tantalum capacitor that needs insulation treatment before welding should be covered with an insulating sleeve. The welded tantalum capacitor combination is placed in a metal casing, cured by injecting epoxy resin, sealed with a sealing cover before curing, and thoroughly cured under certain temperature conditions, and then tested and screened, as well as the subsequent printing, finished product measurement, packaging, and warehousing inspection processes are completed. The manufacturing process of the ultra-high voltage and large-capacity non-solid electrolyte tantalum capacitor is completed.

[0077] In summary, it can be seen from the structure of the ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor of this embodiment that a plurality of airtight tantalum shells are used to package the non-solid electrolyte tantalum capacitors, which are connected in series and in parallel using leads and packaged in a metal shell. The product achieves high voltage, large capacity, and an applicable temperature of -55°C to +125°C. Compared with the current capacitors, it has higher reliability, better thermal stability, low leakage current, and a wide temperature range. Compared with existing capacitors, the capacity of products with the same package size is increased by 50% or the voltage is increased by 30%. The circuit using the capacitor is safer and has a longer lifespan. It can be used in high-power pulse circuits. This structural feature significantly reduces the circuit space occupied by the capacitor.

[0078] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. An ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor, characterized in that: include: Combined tantalum capacitor, metal casing, negative lead wire, thermal conductive epoxy resin, sealing cover, positive lead wire, first lead hole, second lead hole, insulating pad and insulating film; wherein, The first wire outlet hole is arranged on the metal shell or the sealing cover; The second wire outlet hole is arranged on the metal shell or the sealing cover; Insulation pads are provided on the first wire outlet hole and the second wire outlet hole; An insulating film is provided on the inner wall of the metal shell; The combined tantalum capacitor is arranged in the metal shell, one end of the negative electrode lead wire is electrically connected to the negative electrode of the combined tantalum capacitor, and the other end of the negative electrode lead wire is led out of the metal shell from the second lead hole; One end of the positive lead wire is electrically connected to the positive electrode of the combined tantalum capacitor, and the other end of the positive lead wire is led out of the metal housing through the first lead hole; The space outside the combined tantalum capacitor in the metal shell is filled with a heat-conductive epoxy resin to fix the combined tantalum capacitor as a whole; The sealing cover is sealingly arranged on the opening of the metal shell.

2. The ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor according to claim 1, characterized in that: The combined tantalum capacitor is a combined tantalum capacitor composed of at least two non-solid electrolyte tantalum capacitors of the same specification, which are connected into a combined structure by connecting the positive lead and the negative lead of each non-solid electrolyte tantalum capacitor via a wire in any of the following ways: series connection, parallel connection, or series-parallel mixed connection.

3. The ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor according to claim 2, characterized in that: In the combined tantalum capacitor, at least one of an insulating sleeve, an insulating film and an insulating tape is provided on the surface of at least one of two adjacent non-solid electrolyte tantalum capacitors connected in series.

4. The ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor according to claim 2 or 3, characterized in that: Each non-solid electrolyte tantalum capacitor is a non-solid tantalum electrolytic capacitor enclosed in a tantalum metal case or a non-solid tantalum electrolytic capacitor enclosed in a silver case.

5. The ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor according to any one of claims 1 to 3, characterized in that: A high temperature resistant insulating film or a high temperature resistant insulating tape is provided between the combined tantalum capacitor and the metal shell.

6. The ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor according to any one of claims 1 to 3, characterized in that: The insulating pad is a polytetrafluoroethylene insulating pad.

7. A method for manufacturing the ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor according to any one of claims 1 to 6, characterized in that: include: A combined tantalum capacitor is prepared in advance, and a positive lead wire and a negative lead wire are connected to the positive electrode and the negative electrode of the combined tantalum capacitor respectively; Leading the connected negative electrode lead wire out of the metal housing from the second lead hole provided with an insulating pad; Putting the combined tantalum capacitor into the metal shell, and leading the positive lead wire out of the metal shell from the first lead hole provided with an insulating pad; A thermally conductive epoxy resin is poured into the metal shell to be cured. Before curing, a sealing cover is added to the opening of the metal shell to seal the thermally conductive epoxy resin in the metal shell and the overall assembled tantalum capacitor. After the thermally conductive epoxy resin is completely cured, the ultra-high voltage and large-capacity non-solid electrolyte tantalum capacitor is obtained through testing and screening, printing, finished product measurement, packaging, and warehousing inspection.

8. The method for manufacturing an ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor according to claim 7, characterized in that: The combined tantalum capacitor is prepared in advance in the following manner, including: At least two non-solid electrolyte tantalum capacitors of the same specification are selected, and the leads of the non-solid electrolyte tantalum capacitors are connected by connecting wires through lead-tin welding to form a combined structure of a series structure, a parallel structure or a series-parallel mixed structure to form a combined structure of a combined tantalum capacitor.

9. The method for manufacturing an ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor according to claim 8, characterized in that: In the combined tantalum capacitor, at least one of an insulating sleeve, an insulating film and an insulating tape is provided on the surface of at least one of two adjacent non-solid electrolyte tantalum capacitors connected in series.

10. The method for manufacturing an ultra-high voltage and large capacity non-solid electrolyte tantalum capacitor according to any one of claims 7 to 9, characterized in that: When the metal shell needs to be insulated from the negative electrodes of the non-solid electrolyte tantalum capacitors of the combined tantalum capacitor, a high-temperature insulating tape is pasted on the inner wall of the metal shell or a high-temperature insulating film is placed; When the metal shell needs to be connected to the negative electrode of each non-solid electrolyte tantalum capacitor of the combined tantalum capacitor, a high-temperature insulating tape or a high-temperature insulating film is only attached to the positive end of each non-solid electrolyte tantalum capacitor.

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