CN219626484U - Ox horn type right square prism aluminium electrolytic capacitor - Google Patents

Abstract

The utility model relates to the technical field of capacitors, in particular to a ox horn type straight quadrangular prism aluminum electrolytic capacitor, which comprises a straight quadrangular prism core package, a straight quadrangular prism shell and a sealing piece for sealing the core package in the shell; the core package comprises a layer of electrolytic paper, at least two layers of negative foil, a layer of electrolytic paper and at least one layer of positive foil which are sequentially laminated from bottom to top, and also comprises a plurality of leading-out ends, wherein each layer of negative foil is connected with at least one leading-out end, and each layer of positive foil is connected with at least one leading-out end; the plurality of leading-out ends are connected with a corresponding number of external wiring terminals through a plurality of conductive metal pieces fixed on the sealing piece; the external connecting terminal is a ox horn type welding pin or welding lug. The capacitor has the advantages of vibration resistance, high capacitance per unit volume, high energy density, high ripple current resistance, large heat dissipation area, high heat conductivity and the like, improves the space utilization rate in the case, and has good application prospect.

Description

Ox horn type right square prism aluminium electrolytic capacitor

Technical Field

The utility model relates to the technical field of capacitors, in particular to a ox horn type rectangular prism aluminum electrolytic capacitor.

Background

The shape of the shell of the aluminum electrolytic capacitor is cylindrical and square, but most of the core bags are cylindrical, and the core bags are a piece of positive electrode foil, a piece of electrolytic paper and a piece of negative electrode foil which are wound into a cylindrical core bag, are filled with electrolyte, are filled into a cylindrical aluminum shell or square aluminum shell, and are sealed by a mechanical crimping die.

For example, chinese patent application No. 201520772169.9 discloses an aluminum electrolytic capacitor, wherein the core package is elliptical and the outer case is rectangular. Although the capacitor with the structure provides a thought of fully utilizing the space structure in the case, the capacitor is easy to lose effectiveness when the use occasion has vibration requirements and needs higher capacity and higher current impact exists.

Disclosure of Invention

The ox horn type rectangular prism aluminum electrolytic capacitor is provided for solving the technical problems that the capacitor has vibration requirements in use occasions and is invalid when higher capacity and higher current impact are needed. The aluminum electrolytic capacitor with the structure has the advantages of vibration resistance, large capacitance in unit volume, high energy density, high heat conduction capacity and the like.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

a ox horn type right square prism aluminum electrolytic capacitor comprises a right square prism core package, a right square prism shell and a sealing piece sealing the core package in the shell;

the core bag comprises electrolytic paper, a negative foil, electrolytic paper and a positive foil which are sequentially laminated from bottom to top, and is wound and shaped into a straight quadrangular prism shape; the number of layers of the negative electrode foil is at least one layer and the number of layers matched with the positive electrode foil is multiple, or the number of layers of the negative electrode foil is multiple and the number of layers matched with the positive electrode foil is at least one layer;

the core pack further comprises a plurality of leading-out ends, wherein each layer of the negative foil is connected with at least one leading-out end, and each layer of the positive foil is connected with at least one leading-out end; the plurality of leading-out ends are connected with a corresponding number of external wiring terminals through a plurality of conductive metal pieces fixed on the sealing piece; the external connecting terminal is a ox horn type welding pin or welding lug.

Further, the core bag comprises electrolytic paper, two layers of negative foil, electrolytic paper and one layer of positive foil which are sequentially laminated from bottom to top, and is formed by winding and shaping;

or the core bag comprises electrolytic paper, two layers of negative foil, electrolytic paper and two layers of positive foil which are laminated in sequence from bottom to top, and is formed by winding and shaping;

or the core bag comprises electrolytic paper, a layer of negative foil, electrolytic paper and two layers of positive foil which are sequentially laminated from bottom to top, and is formed by winding and shaping.

Further, the number of layers of the electrolytic paper is one or more.

Further, the leading-out end and the external connecting terminal are respectively riveted with the conductive metal piece; the connection mode of the leading-out end and the negative foil and the positive foil is cold press welding or laser welding.

Further, the number of the outlets is three to six, and the external wiring terminals are provided in corresponding numbers. It should be ensured that at least 1 tab is connected to each of the positive electrode foil and the negative electrode foil.

Further, the external connection terminal has a metal plating film on its surface, the film thickness is 1 μm-500 μm, and the material of the metal plating film is one of tin, silver and zinc. The film imparts excellent solderability to the terminal.

Still further, the external connection terminal is a horn-shaped soldering lug, the size of which is 0.6mm×1.5mm-1.2mm×6.0mm.

Further, the ox horn square prism shaped aluminum electrolytic capacitor further includes an electrolyte that impregnates the core and is contained within the case.

The beneficial technical effects are as follows:

in the case structure, the space reserved by the circuit board for the capacitor is usually rectangular space, and the conventional cylindrical capacitor cannot fully utilize the space, so that on one hand, the space utilization rate is low, and on the other hand, the heat dissipation is not facilitated; the core package and the shell of the capacitor are designed to be the straight quadrangular prism, and more straight quadrangular prism capacitors compared with the cylindrical capacitors can be accommodated in the space reserved for the capacitor in the same case, so that the capacitor has higher capacitance and energy density in unit volume, and the heat dissipation area between the straight quadrangular prism capacitors is larger, thereby being beneficial to heat dissipation; in addition, at least one layer of positive electrode foil is arranged in the core package structure and is matched with a plurality of layers of negative electrode foil, or a plurality of layers of positive electrode foil are arranged and are matched with at least one layer of negative electrode foil, so that the capacity of the capacitor can be increased to a certain extent; the structure of the plurality of leading-out ends and the plurality of external wiring terminals is adopted, and the external wiring terminals are arranged as the ox horn type soldering lugs or the soldering pins, the strength of the external wiring terminals of the structure is higher than that of the lead type wiring terminals, the sectional area of the external wiring terminals is larger than that of the lead type wiring terminals by more than 2-8 times, the lead type wiring terminals can bear higher impact force, and the plurality of wiring terminals are connected, so that the capacitor has better vibration resistance and impact resistance and better stability under the application scenes of vibration, impact and the like; the external wiring terminal of the structure can bear higher current capacity, the number of the terminals is increased, the shunting effect can be well achieved, and the external wiring terminal is particularly suitable for application scenes of large current impact.

Drawings

FIG. 1 is a schematic diagram of a ox horn type rectangular prism aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 2 is a top view of an embodiment of a square right prism aluminum electrolytic capacitor;

FIG. 3 is a view showing the structure of a core pack in a square-shaped rectangular prism aluminum electrolytic capacitor of the structure of example 1;

FIG. 4 is a view showing the structure of a core pack in a square-shaped rectangular prism aluminum electrolytic capacitor of the structure of example 2;

FIG. 5 is a view showing the structure of a core pack in a square rectangular prism aluminum electrolytic capacitor having the structure of example 3;

FIG. 6 is a schematic view of each layer of the prismatic core pack of example 1;

FIG. 7 is a schematic view of each layer of the prismatic core pack of example 3;

the device comprises a 1-core package, 11-negative foil, 12-positive foil, 13-electrolytic paper, 14-leading-out end, 2-shell, 3-sealing element, 31-metal conductive element and 4-external wiring terminal; the electrolyte is not shown in the above figures.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, as the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used for convenience in describing the present utility model and simplifying the description based on the azimuth or positional relationship shown in the drawings, it should not be construed as limiting the present utility model, but rather should indicate or imply that the devices or elements referred to must have a specific azimuth, be constructed and operated in a specific azimuth. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.

In the description of the present utility model, it should be noted that unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model is further described below in connection with the drawings and the specific embodiments, without limiting the scope of the utility model.

Example 1

A ox horn type square prism aluminum electrolytic capacitor, the whole structure of which is shown in figure 1, the top view of which is shown in figure 2, comprises a square prism core package 1, a square prism shell 2 and a sealing piece 3 sealing the core package 1 in the shell 2;

the structure of the core pack 1 in this case is shown in fig. 3, and the structure is as follows: the electrolytic paper 13, the two layers of negative foil 11 (the two layers of foil are directly laminated and adopt corrosion foil), the electrolytic paper 13 and the positive foil 12 are wound and shaped into a straight quadrangular prism shape, the schematic diagram of the laminated structure is shown in fig. 6, the core pack 1 also comprises four leading-out ends 14, two leading-out ends 14 are cold-welded on the positive foil 12 and are separated by a certain distance (namely, one layer of positive foil 12 is simultaneously provided with two leading-out ends 14), the other two leading-out ends 14 are cold-welded on the two layers of negative foil 11 respectively (namely, each layer of negative foil 11 is connected with one leading-out end 14), and a plurality of leading-out ends 14 are aligned or misplaced during lamination;

the four outlet ends 14 are riveted to the four external terminals 4 by means of conductive metal parts 31, which can be, for example, conductive nuts and nuts, which are fastened to the sealing part 3; the external wiring terminal 4 is a ox horn type soldering lug, the surface of the soldering lug is provided with a metal plating film, the film thickness is 1-500 mu m, the material of the metal plating film is one of tin, silver and zinc, and the size of the soldering lug is 0.6mm×1.5mm-1.2mm×6.0mm;

in addition, the capacitor further includes an electrolyte (not shown) impregnating the core pack 1, and the electrolyte impregnates the core pack 1 and is contained in the case 2.

Example 2

A ox horn type square prism aluminum electrolytic capacitor, the whole structure of which is shown in figure 1, the top view of which is shown in figure 2, comprises a square prism core package 1, a square prism shell 2 and a sealing piece 3 sealing the core package 1 in the shell 2;

the structure of the core pack 1 in this case is shown in fig. 4, and the structure is as follows: the core package 1 further comprises four leading-out ends 14, wherein two leading-out ends 14 are respectively welded on the two layers of positive electrode foils 12 by laser (namely, each positive electrode foil 12 is respectively connected with one leading-out end 14), and the other two leading-out ends 14 are respectively welded on the two layers of negative electrode foils 11 by laser (namely, each negative electrode foil 11 is respectively connected with one leading-out end 14), and a plurality of leading-out ends 14 are aligned or misplaced during lamination;

the four outlet ends 14 are riveted to the four external terminals 4 by means of conductive metal parts 31, which can be, for example, conductive nuts and nuts, which are fastened to the sealing part 3; the external connecting terminal 4 is a ox horn type welding pin, the surface of the welding pin is provided with a metal plating film, the film thickness is 1-500 mu m, the material of the metal plating film is one of tin, silver and zinc, and the size of the welding pin is 0.6mm×1.5mm-1.2mm×6.0mm;

in addition, the capacitor further includes an electrolyte (not shown) impregnating the core pack 1, and the electrolyte impregnates the core pack 1 and is contained in the case 2.

Example 3

A ox horn type square prism aluminum electrolytic capacitor, the whole structure of which is shown in figure 1, the top view of which is shown in figure 2, comprises a square prism core package 1, a square prism shell 2 and a sealing piece 3 sealing the core package 1 in the shell 2;

the structure of the core pack 1 in this case is shown in fig. 5, and the structure is as follows: the laminated structure is shown in fig. 7, the core package 1 further comprises four lead-out ends 14, two lead-out ends 14 are respectively welded on two layers of the positive electrode foil 12 in a cold pressing mode (namely, each layer of positive electrode foil 12 is connected with one lead-out end 14), the other two lead-out ends 14 are welded on the negative electrode foil 11 in a cold pressing mode, the two lead-out ends are separated by a certain distance (namely, two lead-out ends 14 are simultaneously arranged on one layer of negative electrode foil 11), and the lead-out ends 14 are aligned or misplaced during lamination;

the four outlet ends 14 are riveted to the four external terminals 4 by means of conductive metal parts 31, which can be, for example, conductive nuts and nuts, which are fastened to the sealing part 3; the external wiring terminal 4 is a ox horn type soldering lug, the surface of the soldering lug is provided with a metal plating film, the film thickness is 1-500 mu m, the material of the metal plating film is one of tin, silver and zinc, and the size of the soldering lug is 0.6mm×1.5mm-1.2mm×6.0mm;

in addition, the capacitor further includes an electrolyte (not shown) impregnating the core pack 1, and the electrolyte impregnates the core pack 1 and is contained in the case 2.

The structure of the ox horn type rectangular prism capacitor can solve the problem that the terminal is easy to break and fall off under the condition of large vibration of the capacitor, and can also solve the problem of failure of the terminal in the capacitor caused by large current impact. The utility model is connected with the four internal leading-out ends through the external connecting terminals of the ox horn type soldering lug or the soldering pin, and the straight quadrangular core-in-package structure of at least one layer of positive electrode foil and a plurality of layers of negative electrode foil or a plurality of layers of positive electrode foil and at least one layer of negative electrode foil is arranged, so that the overall appearance is combined into a straight quadrangular structure, the installation space of the chassis has the advantage of more installation per unit area, the space utilization rate of the chassis is improved, the capacitance per unit volume is high, the energy density per unit volume is high, the heat dissipation area is large, and the thermal conductivity is good; the high-voltage power supply is applied to vibration, impact and other scenes, has better stability, and has better impact current resistance and large ripple current resistance. The ox horn type right square prism capacitor with the structure has better application prospect.

Claims (8)

1. A ox horn type square prism aluminum electrolytic capacitor, characterized by comprising a square prism core pack (1), a square prism shell (2) and a sealing piece (3) for sealing the core pack (1) in the shell (2);

the core bag (1) comprises electrolytic paper (13), a negative foil (11), electrolytic paper (13) and a positive foil (12) which are sequentially laminated from bottom to top, and the electrolytic paper, the negative foil and the positive foil are wound and shaped into a straight quadrangular prism shape; the number of layers of the negative electrode foil (11) is at least one and the number of layers matching the positive electrode foil (12) is multiple, or the number of layers of the negative electrode foil (11) is multiple and the number of layers matching the positive electrode foil (12) is at least one;

the core pack (1) further comprises a plurality of leading-out ends (14), wherein each layer of negative foil (11) is connected with at least one leading-out end (14), and each layer of positive foil (12) is connected with at least one leading-out end (14); the plurality of the leading-out ends (14) are connected with a corresponding number of the plurality of external wiring terminals (4) through a plurality of conductive metal pieces (31) fixed on the sealing piece (3); the external connecting terminal (4) is a ox horn type welding pin or welding lug.

2. The ox horn type right square prism aluminum electrolytic capacitor according to claim 1, wherein the core package (1) is formed by winding and shaping electrolytic paper (13), two layers of negative foil (11), electrolytic paper (13) and one layer of positive foil (12) which are sequentially laminated from bottom to top;

or the core bag (1) comprises electrolytic paper (13), two layers of negative foil (11), electrolytic paper (13) and two layers of positive foil (12) which are sequentially laminated from bottom to top, and is formed by winding and shaping;

or the core bag (1) comprises electrolytic paper (13), a layer of negative foil (11), electrolytic paper (13) and two layers of positive foil (12) which are laminated in sequence from bottom to top, and is formed by winding and shaping.

3. A ox horn type rectangular prism aluminum electrolytic capacitor as claimed in claim 1 or 2, wherein the number of layers of the electrolytic paper is one or more.

4. A square-prism aluminum electrolytic capacitor as claimed in claim 1 or 2, wherein the lead-out terminal (14) and the external connection terminal (4) are respectively riveted with the conductive metal member (31); the connection mode of the leading-out end (14) and the negative foil (11) and the positive foil (12) is cold press welding or laser welding.

5. A square-prism-shaped aluminum electrolytic capacitor as recited in claim 1 or 2, wherein the number of the lead-out terminals (14) is three to six, and the external connection terminals (4) are provided in a corresponding number.

6. The ox horn type rectangular prism aluminum electrolytic capacitor as claimed in claim 1 or 2, wherein the external connection terminal (4) has a metal plating film on its surface, the film thickness is 1 μm-500 μm, and the metal plating film is made of one of tin, silver and zinc.

7. The ox horn type right square prism body aluminum electrolytic capacitor as claimed in claim 6, wherein the external connection terminal (4) is a ox horn type tab with a size of 0.6mm x 1.5mm-1.2mm x 6.0mm.

8. A ox horn square prism shaped aluminum electrolytic capacitor as claimed in claim 1 or 2, further comprising an electrolytic solution impregnating the core pack (1) and contained in the case (2).