CN217902908U

CN217902908U - High-capacity density electrolytic capacitor

Info

Publication number: CN217902908U
Application number: CN202221725095.XU
Authority: CN
Inventors: 许雷冰; 刘毅
Original assignee: Hunan Aihua Group Co Ltd
Current assignee: Hunan Aihua Group Co Ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2022-11-25
Anticipated expiration: 2032-07-06

Abstract

A high-capacity density electrolytic capacitor comprises a metal shell, a core package and an insulating cover, wherein the core package is sealed in the metal shell through the insulating cover, the core package consists of anode foil, electrolytic paper and cathode foil, and the anode foil and the cathode foil respectively extend out of the upper end and the lower end of the core package; the cathode foil extending out of the lower end of the core package is in contact with and electrically connected with the inner wall of the bottom of the metal shell, a current collecting plate is arranged between the anode foil extending out of the upper end of the core package and the insulating cover, the anode foil extending out of the upper end of the core package is in contact with and electrically connected with the current collecting plate, an anode leading-out terminal is connected onto the current collecting plate, and the anode leading-out terminal penetrates out of the insulating cover. In this application, replace traditional rubber buffer through the insulating boot and come to seal the core package in the metal casing, the thickness of insulating boot can be done thinly to effectual reduction electrolytic capacitor's height, thereby improve electrolytic capacitor's capacity density.

Description

High-capacity density electrolytic capacitor

Technical Field

The utility model relates to an electrolytic capacitor especially relates to a high capacity density electrolytic capacitor.

Background

Most of the existing capacitors are sealed by rubber plugs, however, the sealing form of the rubber plugs is that the rubber plugs have certain height, so that the size of the electrolytic capacitor is larger, and the capacity density of the electrolytic capacitor is reduced. Meanwhile, in the form of sealing by using a rubber plug, the air tightness is not high, and the square electrolytic capacitor is not suitable for use.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide an airtight effectual and high capacity density electrolytic capacitor.

In order to solve the technical problem, the utility model provides a technical scheme does: a high-capacity-density electrolytic capacitor comprises a metal shell, a core package and an insulating cover, wherein the core package is sealed in the metal shell through the insulating cover, the core package consists of anode foil, electrolytic paper and cathode foil, and the anode foil and the cathode foil respectively extend out of the upper end and the lower end of the core package; the cathode foil extending out of the lower end of the core package is in contact with and electrically connected with the inner wall of the bottom of the metal shell, a current collecting plate is arranged between the anode foil extending out of the upper end of the core package and the insulating cover, the anode foil extending out of the upper end of the core package is in contact with and electrically connected with the current collecting plate, an anode leading-out terminal is connected to the current collecting plate, and the anode leading-out terminal penetrates out of the insulating cover.

In the above high capacity density electrolytic capacitor, preferably, the insulating cover includes a top plate and a side wall, and the side wall is hermetically connected to the upper wall of the open end of the metal case; and the top plate is provided with a through hole through which the anode leading-out terminal passes, and the top plate is hermetically connected with the current collecting plate.

In the high-capacity-density electrolytic capacitor, it is preferable that the insulating cover is formed in a cylindrical shape having an open lower end, the metal case is formed in a cylindrical shape having an open upper end, and the insulating cover is covered on the upper end of the metal case.

In the high capacity density electrolytic capacitor, the core wrap is preferably formed by winding an anode foil, an electrolytic paper and a cathode foil.

In the high-capacity-density electrolytic capacitor, preferably, the insulating cover has a rectangular parallelepiped shape with a lower end open, the metal case has a rectangular parallelepiped shape with an upper end open, and the insulating cover covers the upper end of the metal case.

In the above electrolytic capacitor with high capacity density, preferably, the core package is composed of a sheet-shaped anode foil, a sheet-shaped cathode foil and electrolytic paper, and the anode foil and the cathode foil are respectively arranged on two sides of the electrolytic paper after the electrolytic paper is folded.

Compared with the prior art, the utility model has the advantages of: in this application, replace traditional rubber buffer through the insulating boot and seal the core package in the metal casing, the thickness of insulating boot can be done than thinner to effectual reduction electrolytic capacitor's height, thereby improve electrolytic capacitor's capacity density.

Drawings

FIG. 1 is a schematic view showing the structure of a high-capacity density electrolytic capacitor in example 1.

Fig. 2 is a schematic structural diagram of the core package in embodiment 1.

FIG. 3 is a schematic view showing the structure of a high-capacity density electrolytic capacitor in example 2.

Description of the figures

1. A metal housing; 2. an insulating cover; 3. a core package; 31. an anode foil; 32. electrolytic paper; 33. a cathode foil; 4. a collector plate; 5. an anode lead-out terminal; 6. and a cathode lead-out terminal.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.

It should be particularly noted that when an element is referred to as being "fixed to, connected to or communicated with" another element, it can be directly fixed to, connected to or communicated with the other element or indirectly fixed to, connected to or communicated with the other element through other intermediate connecting components.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.

Example 1

The high-capacity-density electrolytic capacitor shown in fig. 1 is an aluminum electrolytic capacitor, and comprises a metal shell 1, a core package 3 and an insulating cover 2, wherein the core package 3 is sealed in the metal shell 1 through the insulating cover 2, and the core package 3 is composed of an anode foil 31, electrolytic paper 32 and a cathode foil 33. In the present embodiment, the metal case 1 has a square shape; the core package 3 is composed of a sheet-shaped anode foil 31, a sheet-shaped cathode foil 33 and electrolytic paper 32, and the anode foil 31 and the cathode foil 33 are respectively arranged on two sides of the electrolytic paper 32 after the electrolytic paper 32 is folded. The core package 3 is also formed in a square shape, the insulating cover 2 is in a rectangular parallelepiped shape with an opening at the lower end, the metal shell 1 is in a rectangular parallelepiped shape with an opening at the upper end, and the insulating cover 2 covers the upper end of the metal shell 1.

In the present embodiment, as shown in fig. 2, the anode foil 31 and the cathode foil 33 respectively extend out of the upper end of the core pack 3 and the lower end of the core pack 3; the cathode foil 33 extending out of the lower end of the core package 3 is in contact with and electrically connected with the inner wall of the bottom of the metal shell 1, a current collecting plate 4 is arranged between the anode foil 31 extending out of the upper end of the core package 3 and the insulating cover 2, the anode foil 31 extending out of the upper end of the core package 3 is in contact with and electrically connected with the current collecting plate 4, an anode leading-out terminal 5 is connected to the current collecting plate 4, and the anode leading-out terminal 5 penetrates out of the insulating cover 2; a cathode lead-out terminal 6 is connected to the metal case 1. In this embodiment, the upper end of the core pack 3 refers to one end of the core pack 3 close to the insulating cover 2 after the aluminum electrolytic capacitor is assembled. In the present embodiment, as can be seen from fig. 2, the anode foil 31 extends from the upper end of the core pack 3, and the upper end of the cathode foil 33 is located at a lower position than the upper end of the electrolytic paper 32 at the upper end of the core pack 3, that is, the electrolytic paper 32 on both sides of the upper end of the cathode foil 33 extends from the upper end of the cathode foil 33, so that the electrolytic paper 32 on the upper side of the cathode foil 33 completely covers the upper end of the cathode foil 33, thereby reducing the possibility of short circuit between the burrs at the upper section of the cathode foil 33 and the anode foil 31. The cathode foil 33 protrudes from the lower end of the core pack 3, and the lower end of the anode foil 31 is located higher than the lower end of the electrolytic paper 32 at the lower end of the core pack 3, so that the electrolytic paper 32 at the lower side of the anode foil 31 completely wraps the lower end of the anode foil 31, thereby reducing the possibility of short circuit between burrs at the lower end of the anode foil 31 and the cathode foil 33.

In the embodiment, the insulating cover 2 comprises a top plate and a side wall, and the side wall is connected with the upper wall of the opening end of the metal shell 1 in a sealing manner through a sealant; the top plate is provided with a through hole through which the anode leading-out terminal 5 passes, and the top plate is hermetically connected with the collector plate 4 through sealant. The sealant can adopt thermosetting resin glue. When the insulating cover 2 is transparent, a photo-curable resin paste may be used.

In this application, replace traditional rubber buffer through insulating boot 2 and seal core package 3 in to metal casing 1, insulating boot 2's thickness can be done comparatively thinly to effectual reduction electrolytic capacitor's height, thereby improve electrolytic capacitor's capacity density. Simultaneously, in this embodiment, adopt sealed glue with between insulating boot 2 and the shell to and sealing connection between insulating boot 2 and the current collection board 4, the sealed effectual of this kind of sealed form for the air tightness performance of condenser obtains promoting.

Example 2

In the present embodiment, as shown in fig. 3, the insulating cover 2 is cylindrical with an open lower end, the metal case 1 is cylindrical with an open upper end, and the insulating cover 2 covers the upper end of the metal case 1. The core pack 3 is cylindrical, and the core pack 3 is formed by winding an anode foil 31, an electrolytic paper 32, and a cathode foil 33. The other portions of this example are the same as example 1.

Claims

1. A high capacity density electrolytic capacitor characterized by: the core package is sealed in the metal shell through the insulating cover, the core package is composed of anode foil, electrolytic paper and cathode foil, and the anode foil and the cathode foil respectively extend out of the upper end of the core package and the lower end of the core package; the cathode foil extending out of the lower end of the core package is in contact with and electrically connected with the inner wall of the bottom of the metal shell, a current collecting plate is arranged between the anode foil extending out of the upper end of the core package and the insulating cover, the anode foil extending out of the upper end of the core package is in contact with and electrically connected with the current collecting plate, an anode leading-out terminal is connected onto the current collecting plate, and the anode leading-out terminal penetrates out of the insulating cover.

2. The high capacity density electrolytic capacitor as recited in claim 1, wherein: the insulating cover comprises a top plate and a side wall, and the side wall is connected with the upper wall of the opening end of the metal shell in a sealing mode; and the top plate is provided with a through hole through which the anode leading-out terminal passes, and the top plate is hermetically connected with the collector plate.

3. The high capacity density electrolytic capacitor according to claim 1 or 2, characterized in that: the insulating cover is cylindrical with an opening at the lower end, the metal shell is cylindrical with an opening at the upper end, and the insulating cover covers the upper end of the metal shell.

4. The high capacity density electrolytic capacitor according to claim 3, characterized in that: the core package is formed by winding anode foil, electrolytic paper and cathode foil.

5. The high capacity density electrolytic capacitor according to claim 1 or 2, characterized in that: the insulating cover is in a cuboid shape with an opening at the lower end, the metal shell is in a cuboid shape with an opening at the upper end, and the insulating cover covers the upper end of the metal shell.

6. The high capacity density electrolytic capacitor as claimed in claim 5, wherein: the core package is composed of a sheet anode foil, a sheet cathode foil and electrolytic paper, wherein the anode foil and the cathode foil are respectively arranged on two sides of the electrolytic paper after the electrolytic paper is folded.