CN116387046A - High-strength aluminum electrolytic capacitor and manufacturing method thereof - Google Patents

High-strength aluminum electrolytic capacitor and manufacturing method thereof Download PDF

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Publication number
CN116387046A
CN116387046A CN202310500070.2A CN202310500070A CN116387046A CN 116387046 A CN116387046 A CN 116387046A CN 202310500070 A CN202310500070 A CN 202310500070A CN 116387046 A CN116387046 A CN 116387046A
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CN
China
Prior art keywords
metal
explosion
cover plate
electrolytic capacitor
proof
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CN202310500070.2A
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Chinese (zh)
Inventor
尹志华
李良
尹超
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Shenzhen Jianghao Electron Co ltd
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Shenzhen Jianghao Electron Co ltd
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Priority to CN202310500070.2A priority Critical patent/CN116387046A/en
Publication of CN116387046A publication Critical patent/CN116387046A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/08—Housing; Encapsulation
    • H01G9/10—Sealing, e.g. of lead-in wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/008—Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/08—Housing; Encapsulation
    • H01G9/12—Vents or other means allowing expansion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13—Energy storage using capacitors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Laser Beam Processing (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Abstract

The invention discloses a high-strength aluminum electrolytic capacitor and a manufacturing method thereof, wherein the high-strength aluminum electrolytic capacitor comprises a metal shell, a core pack arranged in the metal shell, a metal explosion-proof cover plate for packaging the core pack in the metal shell, and a terminal assembly arranged on the metal cover plate; the terminal assembly is fixed on the metal cover plate through laser welding, and the metal explosion-proof cover plate and the metal shell are mounted together through laser welding so as to encapsulate the core package in the metal shell; the terminal assembly is also connected to the core pack by laser welding. The high-strength aluminum electrolytic capacitor has firm structure and good explosion-proof effect, and can greatly prolong the service life of the aluminum electrolytic capacitor.

Description

High-strength aluminum electrolytic capacitor and manufacturing method thereof
Technical Field
The invention belongs to the technical field of capacitors, and particularly relates to a high-strength aluminum electrolytic capacitor and a manufacturing method thereof.
Background
With the continuous improvement of capacitor performance, aluminum electrolytic capacitors have been widely used in consumer electronics, communication products, computers and peripheral products, new energy, automation control, automotive industry, photovoltaic products, high-speed railway and aviation and military equipment, etc. In the technical field of consumer electronics, the application of the aluminum electrolytic capacitor has the characteristics of small volume, large stored electric quantity and high cost performance along with structural transformation and technical progress, and the aluminum electrolytic capacitor is expanded in various emerging fields such as energy-saving lamps, frequency converters, new energy sources and the like, and has wider application range.
At present, an aluminum electrolytic capacitor is generally composed of a core bag formed by winding positive and negative aluminum foils and electrolytic paper, a cylindrical aluminum shell and a sealing cover plate with positive and negative wiring terminals, wherein positive and negative terminal lead-out holes are formed in the cover plate, and positive and negative terminals are arranged on the cover plate through the through holes.
Among them, the cover plate of most aluminum electrolytic capacitors is generally manufactured by compounding high-temperature-resistant rubber with a phenolic resin substrate, and the performance of the cover plate has a significant influence on the performance of the capacitor. When the capacitor fails, the core bag heats, the aluminum electrolyte expands when encountering heat, gas is generated from slow to rapid inside the aluminum shell, and the pressure can cause the cover plate of the capacitor to bulge upwards, so that the capacitor can burst. The cover plate of most electrolytic capacitors is generally provided with an explosion-proof valve, but most of the electrolytic capacitors are simple in explosion-proof structure and poor in explosion-proof effect, so that the service life of the capacitors is short, the service efficiency of the capacitors is low, and serious potential safety hazards exist.
It is thus seen that there is a need in the art for a development and research to provide a solution to provide a high strength aluminum electrolytic capacitor.
The foregoing background is only for the purpose of providing an understanding of the inventive concepts and technical aspects of the present invention and is not necessarily prior art to the present application and is not intended to be used to evaluate the novelty and creativity of the present application in the event that no clear evidence indicates that such is already disclosed at the filing date of the present application.
Disclosure of Invention
The invention aims to provide a high-strength aluminum electrolytic capacitor and a manufacturing method thereof, which are used for solving at least one of the problems in the background technology.
In order to achieve the above object, the technical solution of the embodiment of the present invention is as follows:
a high-strength aluminum electrolytic capacitor comprises a metal shell, a core pack arranged in the metal shell, a metal explosion-proof cover plate for packaging the core pack in the metal shell, and a terminal assembly arranged on the metal cover plate; the terminal assembly is fixed on the metal cover plate through laser welding, and the metal explosion-proof cover plate and the metal shell are mounted together through laser welding so as to encapsulate the core package in the metal shell; the terminal assembly is also connected to the core pack by laser welding.
In some embodiments, the metal shell is a rectangular-shaped container that is open at one end.
In some embodiments, the metal shell is an aluminum shell, a stainless steel shell, or an alloy shell.
In some embodiments, the metal shell is flat rectangular, and one end of the metal shell is provided with a rectangular opening.
In some embodiments, the metal explosion-proof cover plate is encapsulated at the rectangular opening of the metal shell and is connected with the metal shell through laser welding.
In some embodiments, the metal explosion-proof cover plate comprises a metal cover plate main body and a terminal assembly arranged on the metal cover plate main body; the metal cover plate main body is provided with a groove, and a terminal assembly mounting hole and an explosion-proof structure recessed on the surface of the groove are arranged on the bottom surface of the groove.
In some embodiments, the explosion-proof structure is disposed in a middle position of the groove; the explosion-proof structure comprises an explosion-proof groove formed by recessing the surface of the groove and a protrusion formed on the surface of the metal cover plate main body corresponding to the explosion-proof groove.
In some embodiments, the terminal assembly includes an outgoing metal lead, an insulating rubber mount, and a metal sleeve.
In some embodiments, the insulating rubber seat is disposed between the lead-out metal lead pin and a metal sleeve welded to the terminal assembly mounting hole, thereby mounting and securing the terminal assembly to the metal cover body.
In some embodiments, the depth of the groove is less than the height of the metal sleeve of the terminal assembly; the outer diameter of the metal sleeve is matched with the terminal assembly mounting hole.
The technical scheme of another embodiment of the invention is as follows:
a manufacturing method of a high-strength aluminum electrolytic capacitor comprises the following steps:
s10, providing a metal shell, wherein the metal shell is a flat rectangular container with a rectangular opening at one end;
s11, providing a core pack, and installing the core pack in a metal shell; wherein the core pack is flat corresponding to the metal shell, and a current collector is arranged on the core pack;
s12, providing a metal explosion-proof cover plate, and arranging a metal guide pin on the metal explosion-proof cover plate; and the metal explosion-proof cover plate is encapsulated and welded at the rectangular opening of the metal shell through laser welding, and the metal guide pin is welded on the current collector of the core package through laser welding, so that the core package is encapsulated inside the metal shell.
In some embodiments, step 12 further comprises:
arranging a terminal assembly mounting hole on the metal explosion-proof cover plate;
providing a metal sleeve and an insulating rubber seat;
a through hole is formed in the middle of the insulating rubber seat, the metal guide pin penetrates through the through hole, the metal sleeve is sleeved on the surface of the insulating rubber seat, the metal sleeve is subjected to corset, and the edge of the opening of the metal sleeve is curled, so that the metal guide pin, the insulating rubber seat and the metal sleeve are tightly installed and fixed together to form a terminal assembly;
and installing the terminal assembly at the assembly installation hole of the metal explosion-proof cover plate, and welding the metal sleeve on the assembly installation hole through laser welding.
In some embodiments, step 12 further comprises:
a groove is arranged on the metal explosion-proof cover plate, and a concave explosion-proof structure is arranged on the bottom surface of the groove; the explosion-proof structure comprises an explosion-proof groove formed on the surface of the groove in a recessed mode and a protrusion formed on the surface of the metal explosion-proof cover plate at the position corresponding to the explosion-proof groove.
The technical scheme of the invention has the beneficial effects that:
compared with the prior art, the high-strength aluminum electrolytic capacitor has the advantages of firm structure and good explosion-proof effect, and can greatly prolong the service life of the aluminum electrolytic capacitor.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a perspective view of a high-strength aluminum electrolytic capacitor according to an embodiment of the present invention;
FIG. 2 is a partially exploded schematic view of a high strength aluminum electrolytic capacitor in accordance with one embodiment of the invention;
FIG. 3 is a partially exploded schematic view of a high strength aluminum electrolytic capacitor in accordance with one embodiment of the invention;
FIG. 4 is a partially exploded schematic view of a high strength aluminum electrolytic capacitor in accordance with one embodiment of the invention;
FIG. 5 is a schematic view of a metallic explosion-proof cover plate of a high strength aluminum electrolytic capacitor in accordance with one embodiment of the present invention;
FIG. 6 is an exploded view of a terminal assembly of a high strength aluminum electrolytic capacitor according to one embodiment of the present invention;
FIG. 7 is a schematic view, partially in section, of a metallic explosion-proof cover plate of a high strength aluminum electrolytic capacitor in accordance with one embodiment of the present invention;
FIG. 8 is another angular partially cut-away schematic illustration of a metallic explosion-proof cover plate of a high strength aluminum electrolytic capacitor in accordance with one embodiment of the invention;
FIG. 9 is another angular schematic view of a metallic explosion proof cover plate of a high strength aluminum electrolytic capacitor in accordance with one embodiment of the present invention;
fig. 10 is a flow chart showing a method of manufacturing a high-strength aluminum electrolytic capacitor according to another embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention more clear and make those skilled in the art better understand the solutions of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for a fixing function or for a circuit communication function.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing embodiments of the invention and to simplify the description by referring to the figures, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In describing embodiments of the present invention, unless explicitly stated and limited otherwise, the meaning of "plurality" is two or more, and the terms "mounted," "connected," "secured," etc. are to be construed broadly, as for example, they may be fixedly connected, detachably connected, or as a unit; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 to 9, as an embodiment of the present invention, there is provided a high-strength aluminum electrolytic capacitor 100, and as shown in fig. 2, the high-strength aluminum electrolytic capacitor 100 of the present invention includes a metal case 10, a core pack 20 installed in the metal case 10, a metal explosion-proof cover 300 encapsulating the core pack 20 in the metal case 10, and a terminal assembly 400 installed on the metal cover 300; wherein the terminal assembly 400 is fixed on the metal cover plate 300 by laser welding, and the metal explosion-proof cover plate 300 and the metal housing 10 are mounted together by laser welding to encapsulate the core pack 20 in the metal housing 10; the terminal assembly 400 is also connected to the core pack 20 by laser welding.
Referring to fig. 2, the core pack 20 includes a current collector 21, electrolytic paper (not numbered), a cathode foil (not numbered), and an anode foil (not numbered), wherein electrolytic paper layers are respectively disposed between the innermost layer of the core pack 20 and the cathode foil and the anode foil; the current collector 21 includes an anode current collector (not numbered) and a cathode current collector (not numbered); specifically, a negative current collector is led out of the cathode foil, and a positive current collector is led out of the anode foil; as an embodiment of the invention, the electrolytic paper, the cathode foil and the anode foil are arranged in sequence. In another embodiment, after the electrolytic paper and the cathode foil are wound into a flat shape with a certain thickness, adding the positive foil and continuing to wind into a flat shape until the quantitative cutting length of the positive foil is fully wrapped in the electrolytic paper and the cathode composite layer. In some embodiments, the core pack 20 is generally in the shape of a flat rectangle.
The metal shell 10 is a rectangular container with one end open, and is made of metal; in particular, the metal shell 10 may be an aluminum shell, a stainless steel shell, or an alloy shell. In some embodiments, one end of the metal casing 10 is provided with a rectangular opening 101, and the metal casing 10 is flat rectangular; the core pack 20 is placed inside the metal shell 10 through the rectangular opening 101 of the metal shell 10. In some embodiments, rounded transitions are provided at the corners of the metal shell 10.
The metal explosion-proof cover 300 is encapsulated at the rectangular opening 101 of the metal casing 10, and is connected with the metal casing 10 by laser welding, and the metal cover 300 is substantially rectangular. Specifically, the metal explosion-proof cover 300 includes a metal cover body 30, and a terminal assembly 400 disposed on the metal cover body 30; wherein, the metal cover body 30 is provided with a groove 31, and a terminal assembly mounting hole 310 and an explosion-proof structure 311 recessed on the surface of the groove are arranged on the bottom surface of the groove 31; the explosion-proof structure 311 is arranged in the middle of the groove 31; the explosion-proof structure 311 includes an explosion-proof groove 312 concavely formed at the surface of the recess 31 and a protrusion 313 formed at the surface of the metal cap body 30 corresponding to the explosion-proof groove 312.
In some embodiments, the bottom surface of the explosion proof slot 312 is provided with a slot 314; in some embodiments, the explosion-proof slot 312 is elongated, and the surface of the explosion-proof slot 312 is provided with a smooth arc shape; the slots 314 are configured as rectangular strip-shaped grooves, and the bottom surfaces of the slots 314 are plane.
It should be noted that, in other embodiments, the explosion-proof slot 312 and/or the slot 314 may be configured in any shape, which is not limited to the above-mentioned embodiments.
In some embodiments, the top of the protrusion 313 forms an annular groove 315, and the bottom surface of the annular groove 315 is a plane; in some embodiments, as shown in FIG. 1, a strip groove 316 is provided on the bottom surface of the annular groove 315.
The terminal assembly 400 comprises a lead-out metal guide pin 40, an insulating rubber seat 41 and a metal sleeve 42; the insulating rubber seat 41 is disposed between the lead-out metal pins 40 and the metal sleeve 42, and the metal sleeve 42 is welded to the terminal assembly mounting hole 310, so that the terminal assembly 400 is mounted and fixed on the metal cover body 30.
Referring to fig. 5, the opening edge of the groove 31 of the metal cover body 30 is provided in an arc shape to form an arc opening inclined inward; the junction of the bottom surface and the peripheral side surfaces of the groove 31 is provided with an arc transition. In the embodiment of the invention, the groove 31 of the metal cover body 30 is a rectangular shape. In some embodiments, the metal cover body 30 has a rectangular shape, and the connection between each two adjacent surfaces of the outer surface of the metal cover body 30 is configured to have an arc shape.
In some embodiments, the depth of the recess 31 is less than the height of the metal sleeve 42 of the terminal assembly 400; the outer diameter of the metal sleeve 42 is adapted to the terminal assembly mounting hole 310; the insulating rubber seat 41 of the terminal assembly 400 includes a cylindrical sleeve 410 and a circular bottom plate 411, and the circular bottom plate 411 has an outer diameter larger than the aperture of the terminal assembly mounting hole 310. The metal sleeve is welded at the terminal assembly mounting hole of the metal explosion-proof cover plate through laser, so that the terminal assembly is fixed on the metal explosion-proof cover plate.
In some embodiments, the terminal assembly mounting holes 310 are two for mounting the positive and negative terminal assemblies. The two terminal assembly mounting holes 310 are symmetrically or asymmetrically provided on the metal cap body 30. The explosion-proof structure 311 is disposed at a position between the two terminal assembly mounting holes 310. In some embodiments, the midline of the explosion proof slot 312 coincides with the center line of the two terminal assembly mounting holes 310.
Referring to fig. 5 and 6, an insulating rubber seat 41 of the terminal assembly is provided between the lead-out metal lead 40 and the metal sleeve 42 so as to insulate the lead-out metal lead 40 from the metal sleeve 42; the lead-out metal guide pin 40 comprises a CP lead 401, an aluminum stem 402 and a welding base 403. In some embodiments, the metal guide pin comprises a positive electrode metal guide pin and a negative electrode metal guide pin, and the welding base of the positive electrode metal guide pin and the welding base of the negative electrode metal guide pin are welded on the positive electrode current collector and the negative electrode current collector of the core pack respectively through laser welding.
In the embodiment of the invention, the CP lead 401 and the aluminum stem 402 from which the metal guide pin is led out are in a circular strip shape, wherein the diameter of the aluminum stem 402 is larger than that of the CP lead 401, and the length of the CP lead 401 is larger than that of the aluminum stem 402; the welding base 403 is disc-shaped and is welded to the battery cell of the aluminum electrolytic container through the welding base.
The insulating rubber seat 41 comprises a cylindrical sleeve 410 and a circular chassis 411, a through hole 412 matched with the aluminum stem 402 for leading out the metal guide pin is arranged in the center of the insulating rubber seat 41, and the outer diameter of the aluminum stem 402 is matched with the inner diameter of the through hole 412, so that the aluminum stem 402 can be tightly sleeved in the through hole 412. In some embodiments, the length of the through hole 412 is greater than the length of the aluminum stem 402. In some embodiments, the diameter of the cylindrical sleeve 410 is less than the diameter of the circular chassis 411. The circular chassis 411 of the insulating rubber mount 41 is abutted against the welding base 403 from which the metal lead 40 is led out.
The metal sleeve 42 is arranged on the surface of the cylindrical sleeve 410 of the insulating rubber seat 41, and corresponds to the cylindrical sleeve 410, the metal sleeve 42 is cylindrical, the inner diameter of the metal sleeve 42 is matched with the outer diameter of the cylindrical sleeve 410, the length of the metal sleeve 42 is greater than that of the cylindrical sleeve 410, the metal sleeve 42 is sleeved on the surface of the cylindrical sleeve 410 to be bunched, one end of the metal sleeve 42 is connected with the circular chassis 411 of the insulating rubber seat 41 in a low-pressure manner, and the other end of the metal sleeve 42 is buckled with the cylindrical sleeve 410 of the insulating rubber seat 41 through a curled edge. In some implementations, the metal sleeve 42 is an aluminum tube.
In some implementations, the height of the protrusions 313 formed on the surface of the metal cover body 30 is no greater than the thickness of the circular bottom plate 411 of the insulating rubber mount 41.
In some embodiments, the welding base 403 of the lead-out metal pin 40 is provided with a circular protruding strip 404 on the upper surface, and an annular groove 405 is formed between the circular protruding strip 404 and the bottom of the aluminum stem; so designed, when the metal sleeve 42 is in a girdling state, the insulating rubber seat 41 is extruded, the circular chassis 411 of the insulating rubber seat 41 is partially extruded and embedded into the annular groove 405, and meanwhile, the circular protruding strip 404 is extruded and embedded into the circular chassis 411 of the insulating rubber seat 41, so that the insulating rubber seat 41 and the lead-out metal guide pin 40 are tightly combined together.
It should be understood that, in some embodiments, the lead-out metal pins 40 may be in the shape of strips with other irregular patterns, and the shapes of the lead-out metal pins are not particularly limited in this embodiment, and any pattern should be included in the protection scope of the present application as long as the pattern does not deviate from the gist of the present application.
Referring to fig. 10, as another embodiment of the present invention, there is provided a method for manufacturing a high-strength aluminum electrolytic capacitor, comprising:
s10, providing a metal shell, wherein the metal shell is a flat rectangular container with a rectangular opening at one end;
s11, providing a core pack, and installing the core pack in a metal shell; wherein the core pack is flat corresponding to the metal shell, and a current collector is arranged on the core pack;
s12, providing a metal explosion-proof cover plate, and arranging a metal guide pin on the metal explosion-proof cover plate; and the metal explosion-proof cover plate is encapsulated and welded at the rectangular opening of the metal shell through laser welding, and the metal guide pin is welded on the current collector of the core package through laser welding, so that the core package is encapsulated inside the metal shell.
Specifically, step 12 further includes:
arranging a terminal assembly mounting hole on the metal explosion-proof cover plate;
providing a metal sleeve and an insulating rubber seat;
a through hole is formed in the middle of the insulating rubber seat, the metal guide pin penetrates through the through hole, the metal sleeve is sleeved on the surface of the insulating rubber seat, the metal sleeve is subjected to corset, and the edge of the opening of the metal sleeve is curled, so that the metal guide pin, the insulating rubber seat and the metal sleeve are tightly installed and fixed together to form a terminal assembly;
and installing the terminal assembly at the assembly installation hole of the metal explosion-proof cover plate, and welding the metal sleeve on the assembly installation hole through laser welding.
In one embodiment, step 12 further includes:
a groove is arranged on the metal explosion-proof cover plate, and a concave explosion-proof structure is arranged on the bottom surface of the groove;
in some embodiments, the explosion-proof structure includes an explosion-proof groove concavely formed at a surface of the groove and a protrusion formed at a position of a surface of the metal explosion-proof cover plate corresponding to the explosion-proof groove.
It is to be understood that the foregoing is a further detailed description of the present invention in connection with the specific/preferred embodiments, and that no particular implementation of the present invention is to be considered limited to such description. It will be apparent to those skilled in the art to which the present invention pertains that many substitutions and modifications of these described embodiments may be made without departing from the inventive concepts herein, and these substitutions and modifications are intended to be within the scope of this patent. In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "preferred embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention.
In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope as defined by the appended claims.
Furthermore, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. Those of ordinary skill in the art will readily appreciate that the above-described disclosures, procedures, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.

Claims (13)

1. A high strength aluminum electrolytic capacitor, characterized in that: the anti-explosion metal shell comprises a metal shell, a core pack arranged in the metal shell, a metal anti-explosion cover plate for packaging the core pack in the metal shell and a terminal assembly arranged on the metal cover plate; the terminal assembly is fixed on the metal cover plate through laser welding, and the metal explosion-proof cover plate and the metal shell are mounted together through laser welding so as to encapsulate the core package in the metal shell; the terminal assembly is also connected to the core pack by laser welding.
2. The high-strength aluminum electrolytic capacitor as recited in claim 1, wherein: the metal shell is a rectangular container with one end open.
3. The high-strength aluminum electrolytic capacitor as recited in claim 2, wherein: the metal shell is an aluminum shell, a stainless steel shell or an alloy shell.
4. A high strength aluminum electrolytic capacitor according to claim 3, wherein: the metal shell is flat rectangle, and one end of metal shell is provided with the rectangle opening.
5. The high-strength aluminum electrolytic capacitor as recited in claim 4, wherein: the metal explosion-proof cover plate is packaged at the rectangular opening of the metal shell and is connected with the metal shell through laser welding.
6. The high-strength aluminum electrolytic capacitor as recited in claim 5, wherein: the metal explosion-proof cover plate comprises a metal cover plate main body and a terminal assembly arranged on the metal cover plate main body; the metal cover plate main body is provided with a groove, and a terminal assembly mounting hole and an explosion-proof structure recessed on the surface of the groove are arranged on the bottom surface of the groove.
7. The high-strength aluminum electrolytic capacitor as recited in claim 6, wherein: the explosion-proof structure is arranged in the middle of the groove; the explosion-proof structure comprises an explosion-proof groove formed by recessing the surface of the groove and a protrusion formed on the surface of the metal cover plate main body corresponding to the explosion-proof groove.
8. The high-strength aluminum electrolytic capacitor as recited in claim 7, wherein: the terminal assembly comprises an outgoing metal guide pin, an insulating rubber seat and a metal sleeve.
9. The high-strength aluminum electrolytic capacitor as recited in claim 8, wherein: the insulating rubber seat is arranged between the lead-out metal guide pin and the metal sleeve, and the metal sleeve is welded at the terminal assembly mounting hole, so that the terminal assembly is mounted and fixed on the metal cover plate main body.
10. The high-strength aluminum electrolytic capacitor as recited in claim 9, wherein: the depth of the groove is smaller than the height of the metal sleeve of the terminal assembly; the outer diameter of the metal sleeve is matched with the terminal assembly mounting hole.
11. A method for manufacturing a high-strength aluminum electrolytic capacitor, comprising the steps of:
s10, providing a metal shell, wherein the metal shell is a flat rectangular container with a rectangular opening at one end;
s11, providing a core pack, and installing the core pack in a metal shell; wherein the core pack is flat corresponding to the metal shell, and a current collector is arranged on the core pack;
s12, providing a metal explosion-proof cover plate, and arranging a metal guide pin on the metal explosion-proof cover plate; and the metal explosion-proof cover plate is encapsulated and welded at the rectangular opening of the metal shell through laser welding, and the metal guide pin is welded on the current collector of the core package through laser welding, so that the core package is encapsulated inside the metal shell.
12. The method of manufacturing a high-strength aluminum electrolytic capacitor as recited in claim 11, wherein step 12 further comprises:
arranging a terminal assembly mounting hole on the metal explosion-proof cover plate;
providing a metal sleeve and an insulating rubber seat;
a through hole is formed in the middle of the insulating rubber seat, the metal guide pin penetrates through the through hole, the metal sleeve is sleeved on the surface of the insulating rubber seat, the metal sleeve is subjected to corset, and the edge of the opening of the metal sleeve is curled, so that the metal guide pin, the insulating rubber seat and the metal sleeve are tightly installed and fixed together to form a terminal assembly;
and installing the terminal assembly at the assembly installation hole of the metal explosion-proof cover plate, and welding the metal sleeve on the assembly installation hole through laser welding.
13. The method of manufacturing a high-strength aluminum electrolytic capacitor as recited in claim 12, wherein step 12 further comprises:
a groove is arranged on the metal explosion-proof cover plate, and a concave explosion-proof structure is arranged on the bottom surface of the groove; the explosion-proof structure comprises an explosion-proof groove formed on the surface of the groove in a recessed mode and a protrusion formed on the surface of the metal explosion-proof cover plate at the position corresponding to the explosion-proof groove.
CN202310500070.2A 2023-05-05 2023-05-05 High-strength aluminum electrolytic capacitor and manufacturing method thereof Pending CN116387046A (en)

Priority Applications (1)

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CN202310500070.2A CN116387046A (en) 2023-05-05 2023-05-05 High-strength aluminum electrolytic capacitor and manufacturing method thereof

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