Vehicle-mounted aluminum electrolytic capacitor

Abstract

The utility model discloses a vehicle-mounted aluminum electrolytic capacitor, which comprises an aluminum shell, a core package packaged in the aluminum shell, and a metal cover plate used for packaging the core package in the aluminum shell, wherein the aluminum shell comprises a cylindrical aluminum shell body and a plurality of fixing sheets arranged on the aluminum shell body; one end of the aluminum shell body is provided with an opening, and the other end of the aluminum shell body is closed, so that an accommodating space with an opening at one end is formed; an annular groove is formed in the end, close to the opening, of the aluminum shell body around the aluminum shell. A sealing ring is arranged between the annular groove and the opening of the aluminum shell body, and the plurality of fixing sheets are attached to the outer surface of the sealing ring; the metal cover plate comprises a disc-shaped cover plate main body and a terminal assembly arranged on the cover plate main body; the cover plate body comprises a circular plane and a circular ring belt which is arranged on the periphery of the circular plane and is perpendicular to the circular plane. The vehicle-mounted aluminum electrolytic capacitor is strong in shock resistance, and can be suitable for various complex application environments with bumpiness and shock.

Description

Technical Field

[0001] The utility model belongs to the technical field of capacitors, and in particular relates to a vehicle-mounted aluminum electrolytic capacitor. Background Art

[0002] At present, aluminum electrolytic capacitors are generally composed of a core package consisting of positive and negative aluminum foils and electrolytic paper windings, a cylindrical aluminum shell, and a sealing cover plate with positive and negative terminal terminals. The cover plate is provided with positive and negative terminal lead-out holes, and the positive and negative terminals are installed on the cover plate through through holes. When in use, the positive and negative terminals are welded to the circuit board, so that the aluminum electrolytic capacitor is installed and fixed on the circuit board as a whole. However, this type of aluminum electrolytic capacitor is only suitable for small volumes and relatively stable application environments. For large-volume aluminum electrolytic capacitors or for use in complex environments with shaking or vibration, it is easy for the aluminum electrolytic capacitor to shake easily if the positive and negative terminals are welded to the circuit board alone. Long-term shaking eventually causes the positive and negative terminals to loosen or be damaged, thereby affecting the life of the whole product; especially when the aluminum electrolytic capacitor is used in a whole product with vibration and bumps such as new energy vehicles, the bumps and vibrations of the whole product are easy to cause the aluminum electrolytic capacitor to shake, thereby affecting the performance of the aluminum electrolytic capacitor and ultimately affecting the life of the whole product.

[0003] It can be seen that, with respect to the above-mentioned current existing technologies, it is necessary to conduct research and development to provide a solution, to provide an on-board aluminum electrolytic capacitor with strong vibration resistance to adapt to various complex application environments with severe vibration.

[0004] The disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Utility Model Content

[0005] The utility model aims to provide a vehicle-mounted aluminum electrolytic capacitor to solve at least one of the above-mentioned background technical problems.

[0006] To achieve the above purpose, the technical solution of the embodiment of the utility model is implemented as follows:

[0007] A vehicle-mounted aluminum electrolytic capacitor comprises an aluminum shell, a core package encapsulated in the aluminum shell, and a metal cover plate for encapsulating the core package in the aluminum shell; wherein the aluminum shell comprises a cylindrical aluminum shell body and a plurality of fixing plates arranged on the aluminum shell body; the aluminum shell body is provided with an opening at one end and is closed at the other end, thereby forming a receiving space with an opening at one end; an annular groove is provided around the aluminum shell near one end of the opening of the aluminum shell body; a sealing ring is formed between the annular groove and the opening of the aluminum shell body, and the plurality of fixing plates are attached to the outer surface of the sealing ring; the metal cover plate comprises a disc-shaped cover plate body and a terminal assembly arranged on the cover plate body; the cover plate body comprises a circular plane and a circular ring belt arranged at the periphery of the circular plane and perpendicular to the circular plane.

[0008] In some embodiments, the fixing sheet includes a fitting portion fitted with the outer surface of the sealing ring, a plug-in portion connected to an external device, and a reinforcing portion disposed between the fitting portion and the plug-in portion.

[0009] In some embodiments, the fitting portion is configured in a sheet shape, and a punching hole is provided on one side of the fitting portion; the fitting portion is attached to the outer surface of the sealing ring by welding or riveting.

[0010] In some embodiments, the fitting portion is in the shape of a square sheet, and the surface of the fitting portion is a plane; the length of the fitting portion is greater than or equal to the width of the sealing ring.

[0011] In some embodiments, the metal cover plate is encapsulated in the opening of the aluminum shell body by laser welding the outer surface of the annular band of the cover plate body to the inner surface of the aluminum shell body.

[0012] In some embodiments, a terminal assembly mounting hole is provided on the circular plane of the cover plate body; the terminal assembly includes a lead-out metal guide pin, an insulating rubber seat, and a metal sleeve.

[0013] In some embodiments, the lead-out metal guide pin includes a connection end connected to an external device, an aluminum stem, and a welding end connected to the core package; the end of the plug-in portion of the fixing plate is on the same plane as the end of the lead-out metal guide pin.

[0014] In some embodiments, the aluminum shell body is provided with a plurality of spokes at the bottom of the receiving space, and the plurality of spokes extend radially toward the inner wall of the aluminum shell body with the bottom center circle as the center.

[0015] In some embodiments, the spokes are in the shape of square strips, one end of the spokes extends to connect to the inner wall of the aluminum shell body, and the other end of the spokes is connected to the edge of the bottom center circle.

[0016] In some embodiments, the end of the spoke connected to the bottom center circle is configured to be wedge-shaped.

[0017] The beneficial effects of the technical solution of the utility model are:

[0018] Compared with the prior art, the vehicle-mounted aluminum electrolytic capacitor of the utility model has strong shock resistance and can adapt to various complex application environments with bumps and vibrations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a three-dimensional schematic diagram of a vehicle-mounted aluminum electrolytic capacitor according to an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of an exploded view of an aluminum shell of a vehicle-mounted aluminum electrolytic capacitor according to an embodiment of the utility model;

[0022] Figure 3 It is a partial three-dimensional schematic diagram of a vehicle-mounted aluminum electrolytic capacitor according to an embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of a fixing plate of a vehicle-mounted aluminum electrolytic capacitor according to an embodiment of the utility model;

[0024] Figure 5 It is an exploded schematic diagram of a terminal assembly of a vehicle-mounted aluminum electrolytic capacitor according to an embodiment of the utility model;

[0025] Figure 6 The utility model is a schematic diagram of the interior of a vehicle-mounted aluminum electrolytic capacitor in a transverse section of an aluminum shell according to an embodiment of the utility model. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the utility model clearer and more understandable, and to enable people in the technical field to better understand the solutions of the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0027] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for fixing or for circuit connection.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, unless otherwise clearly specified and defined, the meaning of "multiple" is two or more, and 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 whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0030] Reference Figure 1-Figure 5 As shown, as an embodiment of the utility model, a vehicle-mounted aluminum electrolytic capacitor 100 is provided, comprising an aluminum shell 10, a core package encapsulated in the aluminum shell 10, and a metal cover plate 300 for encapsulating the core package in the aluminum shell; wherein the aluminum shell 10 comprises a cylindrical aluminum shell body 11 and a plurality of fixing plates 20 arranged on the aluminum shell body 11; wherein the aluminum shell body 11 is provided with an opening at one end and is closed at the other end, thereby forming a receiving space with an opening at one end, and the core package of the capacitor is placed into the receiving space from the opening end of the aluminum shell body 11; the aluminum shell body 11 is provided with an annular groove 101 around the aluminum shell near the opening end; a sealing ring 102 is provided between the annular groove 101 and the opening of the aluminum shell body, and the plurality of fixing plates 20 are attached to the outer surface of the sealing ring 102.

[0031] The opening width of the annular groove 101 is greater than the depth of the groove; the annular groove 101 forms an annular protrusion 103 in the receiving space of the aluminum shell.

[0032] In some embodiments, the height of the annular protrusion 103 formed by the annular groove 101 in the receiving space is substantially equal to the depth of the groove.

[0033] Please refer to Figure 2 , Figure 4 As shown, in some embodiments, the fixing sheet 20 includes a fitting portion 21 fitted with the outer surface of the sealing ring 102, a plug-in portion 22 connected to an external device, and a reinforcing portion 23 disposed between the fitting portion 21 and the plug-in portion 22. In some embodiments, the fitting portion 21 is configured in a sheet shape, and a punching hole 210 is provided on one side of the fitting portion 21; the fitting portion 21 is attached to the outer surface of the sealing ring 102 by welding or riveting. The reinforcing portion 23 is conical, gradually shrinking from the plug-in portion 22 to the fitting portion 21; the plug-in portion 22 is strip-shaped; it should be noted that in some other embodiments, the reinforcing portion 23 and the plug-in portion 22 can also be configured in other shapes.

[0034] In some embodiments, the fitting portion 21 is in the shape of a square sheet, and the surface of the fitting portion is a plane; in some embodiments, the length of the fitting portion 21 is greater than or equal to the width of the sealing ring 102 .

[0035] Please refer to Figure 1-Figure 3 As shown, in some embodiments, the plurality of fixing plates 20 are equidistantly arranged on the outer surface of the sealing ring 102; in an embodiment of the utility model, the number of the fixing plates 20 is an even number, such as four, and the four fixing plates 20 are configured to be located at the four corners of a square; in some embodiments, the number of the fixing plates 20 may also be an odd number, such as three, and the three fixing plates are configured to be located at the three vertices of an equilateral triangle.

[0036] Please refer to Figure 6 As shown, in some embodiments, the aluminum shell body is provided with a plurality of spokes 104 at the bottom of the receiving space, and the plurality of spokes extend radially toward the inner wall of the aluminum shell body with the bottom center circle as the center. In some embodiments, the spokes 104 are in the shape of square strips, one end of the spokes extends to connect to the inner wall of the aluminum shell body, and the other end connects to the edge of the bottom center circle, and the end of the spokes 104 connected to the bottom center circle is wedge-shaped.

[0037] Reference Figure 6 As shown, in some embodiments, a small notch-type explosion-proof structure 105 is provided in the bottom center circle. In the embodiment of the utility model, the explosion-proof structure 105 is a cross-shaped notch.

[0038] In some embodiments, the intersection of the bottom of the receiving space and the inner wall of the aluminum shell body is non-vertically connected. In some embodiments, the spokes 104 are perpendicular to the bottom plane of the receiving space; in some embodiments, the spokes are perpendicular to the inner wall of the aluminum shell body.

[0039] In the embodiment of the utility model, the cylindrical core package is placed in the receiving space of the aluminum shell body, and the protrusion 103 formed by the annular groove inside the aluminum shell squeezes and fixes the core package, thereby fixing the core package in the receiving space of the aluminum shell. When the capacitor is installed on the circuit board, the fixing piece is inserted and fixed on the external circuit board, so that the capacitor is firmly fixed on the circuit board to prevent the capacitor from shaking.

[0040] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, the metal cover plate 300 includes a disc-shaped cover plate body 30 and a terminal assembly 400 arranged on the cover plate body 30; wherein, the cover plate body 30 includes a circular plane, a circular ring belt 301 extending at the periphery of the circular plane and perpendicular to the circular plane, and the circular ring belt 301 and the circular plane are combined to form a concave disc shape; the metal cover plate is encapsulated in the opening position of the aluminum shell by placing the circular ring belt of the cover plate body toward the core package.

[0041] The metal cover plate 300 is encapsulated in the opening of the aluminum shell body by laser welding the outer surface of the annular belt 301 of the cover plate body 30 to the inner surface of the aluminum shell body, thereby encapsulating the core package in the aluminum shell body. The annular groove of the aluminum shell body forms a circle of protrusions 102 inside the aluminum shell body, and the annular belt of the cover plate body 30 abuts against the protrusions 102.

[0042] Reference Figure 3 , Figure 5 As shown, a terminal assembly mounting hole is provided on the circular plane of the cover body 30; the terminal assembly 400 includes a lead-out metal guide pin 40, an insulating rubber seat 41, and a metal sleeve 42; the lead-out metal guide pin 40 includes a connecting end 401 connected to an external device, an aluminum stem 402, and a welding end 403 connected to the core package. The welding end of the lead-out metal guide pin faces the inside of the aluminum shell to be welded to the lead-out electrode on the core package, and the connecting end extends outward from the recessed side of the cover. In some embodiments, the end of the plug-in portion of the fixing plate is on the same plane as the end of the lead-out metal guide pin. When the electrolytic capacitor is installed on a circuit board, a plurality of fixing plates mounted on the surface of the aluminum shell and the lead-out metal guide pin are welded to the circuit together, thereby firmly mounting the electrolytic capacitor on the circuit board.

[0043] It is understandable that, in some embodiments, the lead-out metal guide needle 40 may also be a strip of other irregular shapes, which is not particularly limited in this embodiment. No matter what shape it is, as long as it does not deviate from the main purpose of this application, it should fall within the protection scope of this application.

[0044] It is understandable that the above content is a further detailed description of the invention of the utility model in combination with specific / preferred implementation methods, and it cannot be determined that the specific implementation of the invention of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the invention of the utility model belongs, without departing from the concept of the invention of the utility model, they can also make several substitutions or modifications to these described implementation methods, and these substitutions or modifications should be deemed to belong to the scope of protection of this patent. In the description of this specification, the description of reference terms such as "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model.

[0045] In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradicting each other. Although the embodiments and advantages of the utility model have been described in detail, it should be understood that various changes, substitutions and modifications may be made herein without departing from the scope defined by the appended claims.

[0046] In addition, the scope of the invention is not intended to be limited to the specific embodiments of the processes, machines, manufactures, material compositions, means, methods, and steps described in the specification. It will be readily understood by those skilled in the art that the above disclosures, processes, machines, manufactures, material compositions, means, methods, or steps currently existing or to be developed later that perform substantially the same functions as the corresponding embodiments described herein or obtain substantially the same results as the embodiments described herein may be utilized. Therefore, the appended claims are intended to include these processes, machines, manufactures, material compositions, means, methods, or steps within their scope.

Claims

1. A vehicle-mounted aluminum electrolytic capacitor, characterized in that: It comprises an aluminum shell, a core package encapsulated in the aluminum shell, and a metal cover plate for encapsulating the core package in the aluminum shell; wherein the aluminum shell comprises a cylindrical aluminum shell body and a plurality of fixing plates arranged on the aluminum shell body; the aluminum shell body is provided with an opening at one end and is closed at the other end, thereby forming a receiving space with an opening at one end; an annular groove is provided around the aluminum shell near one end of the opening of the aluminum shell body; a sealing ring is formed between the annular groove and the opening of the aluminum shell body, and the plurality of fixing plates are attached to the outer surface of the sealing ring; the metal cover plate comprises a disc-shaped cover plate body and a terminal assembly arranged on the cover plate body; the cover plate body comprises a circular plane and a circular ring belt arranged at the periphery of the circular plane and perpendicular to the circular plane.

2. The vehicle-mounted aluminum electrolytic capacitor according to claim 1, characterized in that: The fixing sheet comprises a fitting portion fitted with the outer surface of the sealing ring, a plug-in portion connected to an external device, and a reinforcing portion arranged between the fitting portion and the plug-in portion.

3. The vehicle-mounted aluminum electrolytic capacitor according to claim 2, characterized in that: The bonding part is configured in a sheet shape, and a punching hole is provided on one side of the bonding part; the bonding part is attached to the outer surface of the sealing ring by welding or riveting.

4. The vehicle-mounted aluminum electrolytic capacitor according to claim 2, characterized in that: The fitting portion is in the shape of a square sheet, and the surface of the fitting portion is a plane; the length of the fitting portion is greater than or equal to the width of the sealing ring.

5. The vehicle-mounted aluminum electrolytic capacitor according to claim 1, characterized in that: The metal cover plate is encapsulated in the opening of the aluminum shell body by laser welding the outer surface of the annular belt of the cover plate body and the inner surface of the aluminum shell body.

6. The vehicle-mounted aluminum electrolytic capacitor according to claim 1, characterized in that: A terminal assembly mounting hole is arranged on the circular plane of the cover plate body; the terminal assembly comprises a lead-out metal guide pin, an insulating rubber seat, and a metal sleeve.

7. The vehicle-mounted aluminum electrolytic capacitor according to claim 6, characterized in that: The lead-out metal guide pin includes a connection end connected to an external device, an aluminum stem, and a welding end connected to the core package; the end of the plug-in portion of the fixing plate and the end of the lead-out metal guide pin are on the same plane.

8. The vehicle-mounted aluminum electrolytic capacitor according to claim 1, characterized in that: The aluminum shell body is provided with a plurality of spokes at the bottom of the receiving space, and the plurality of spokes extend radially toward the inner wall of the aluminum shell body with the bottom center circle as the center.

9. The vehicle-mounted aluminum electrolytic capacitor according to claim 8, characterized in that: The spokes are in the shape of square strips, one end of the spokes extends to connect to the inner wall of the aluminum shell body, and the other end of the spokes connects to the edge of the bottom center circle.

10. The vehicle-mounted aluminum electrolytic capacitor according to claim 9, characterized in that: One end of the spoke connected to the bottom center circle is arranged in a wedge shape.

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