Aluminum electrolytic capacitor with good isolation effect from circuit board

Abstract

The utility model provides a kind of aluminium electrolytic capacitor with good isolation effect from circuit board, including shell, core package and sealing element, core package is sealed and set in shell by sealing element, sleeve is provided on shell;The opening end of shell is sealed by crimping between sealing element, and insulation isolation sheet is provided on the crimping part of shell, and is fixed after being thermoplastic formed by sleeve.In the utility model, insulation isolation sheet is provided on the crimping part of shell, after aluminium electrolytic capacitor is installed on circuit board, insulation isolation sheet can well isolate shell and circuit board, so as to ensure the insulation between aluminium electrolytic capacitor and circuit board.

Description

Technical Field

[0001] This utility model relates to an aluminum electrolytic capacitor, and more particularly to an aluminum electrolytic capacitor with good isolation effect from the circuit board. Background Technology

[0002] Aluminum electrolytic capacitors are widely used in various electronic products. They have functions such as filtering, bypassing, coupling, and fast charging and discharging in electronic circuits. They are characterized by small size, large energy storage capacity, and high cost performance. They are widely used in consumer electronics, automation control, automotive industry, and optoelectronic products.

[0003] With the increasing demand for miniaturization in electronic products, aluminum electrolytic capacitors, as key electronic components on circuit boards, directly impact the miniaturization of the entire product. PCB layouts are also shrinking from traditional large-area single-sided boards. Due to space constraints and increased trace density, routing traces under the aluminum electrolytic capacitor mounting location has become a critical issue. This is because the insulation performance of the aluminum electrolytic capacitor sleeve is relatively poor; moreover, the sleeve is prone to damage during mounting. Routing traces under the aluminum electrolytic capacitor mounting location can create a circuit between the aluminum shell of the capacitor and the copper foil of the PCB, causing the entire device to malfunction. Traditional stepped plugs, due to limitations in step height, have certain limitations in application to miniaturized electronics. Therefore, adapting aluminum electrolytic capacitor design to PCB miniaturization has become a challenge for aluminum electrolytic capacitor design engineers. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an aluminum electrolytic capacitor with good isolation effect from the circuit board.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows: an aluminum electrolytic capacitor with good isolation effect from the circuit board, comprising a shell, a core, and a sealing element. The core is sealed inside the shell by the sealing element, and a sleeve is provided on the shell. The open end of the shell is sealed to the sealing element by a rolled edge, and an insulating isolation sheet is provided on the rolled edge of the shell. The insulating isolation sheet is fixed after being thermoplastic formed by the sleeve.

[0006] Preferably, in the aluminum electrolytic capacitor described above, which provides good isolation from the circuit board, the thickness of the insulating insulating sheet is between 0.05 mm and 0.15 mm.

[0007] Preferably, in the aluminum electrolytic capacitor described above, which provides good isolation from the circuit board, the insulating insulating sheet and the sealing element are connected by sealant.

[0008] In the aforementioned aluminum electrolytic capacitor with good isolation effect from the circuit board, preferably, the sealant fills the space between the insulating insulating sheet and the sealing element.

[0009] Preferably, the insulating insulating sheet of the aluminum electrolytic capacitor described above, which provides good isolation from the circuit board, is circular or annular.

[0010] Compared with the prior art, the advantages of this utility model are as follows: In this utility model, an insulating isolation sheet is provided on the rolled edge of the outer shell. After the aluminum electrolytic capacitor is installed on the circuit board, the insulating isolation sheet can effectively isolate the outer shell and the circuit board, thereby ensuring the insulation between the aluminum electrolytic capacitor and the circuit board. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the aluminum electrolytic capacitor with good isolation effect from the circuit board in Example 1.

[0012] Figure 2 This is a schematic diagram of the installation structure of the insulating isolation ring in Example 1.

[0013] Figure 3 This is a schematic diagram of the installation structure of the insulating isolation ring in Example 2.

[0014] Figure 4 This is a schematic diagram of the aluminum electrolytic capacitor with good isolation effect from the circuit board in Example 3.

[0015] Legend

[0016] 1. Outer shell; 2. Seal; 3. Insulating insulating sheet; 4. Sealant. Detailed Implementation

[0017] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0018] It should be noted that when a component is described as being "fixed to, attached to, connected to or connected to" another component, it can be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.

[0019] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention. Example 1

[0020] like Figure 1 and Figure 2 The aluminum electrolytic capacitor shown is a leaded type, providing good isolation from the circuit board. It includes a casing, a core, and a seal, the seal being a rubber stopper. The core is sealed inside the casing by the rubber stopper, and a sleeve is provided on the casing. The open end of the casing is sealed to the seal by a rolled edge, and an insulating isolation sheet is provided on the rolled edge of the casing. The insulating isolation sheet is fixed after being thermoformed by the sleeve. The thickness of the insulating isolation sheet is between 0.05mm and 0.15mm. In this embodiment, the insulating isolation sheet on the rolled edge of the casing effectively isolates the casing from the circuit board after the aluminum electrolytic capacitor is mounted on the circuit board, thus ensuring insulation between the aluminum electrolytic capacitor and the circuit board.

[0021] In this embodiment, the insulating sheet can be made of PET or other insulating materials, such as polycarbonate, polypropylene, and polyimide.

[0022] In this embodiment, the insulating spacer is circular and completely covers the rolled edge of the outer casing. To facilitate sleeve installation, the diameter of the insulating spacer is smaller than or equal to the diameter of the outer casing.

[0023] In this embodiment, as shown in Figure 2, the insulating insulating sheet must be installed before the sleeve is installed. The insulating insulating sheet can be annular or circular; if a circular insulating sheet is used, two through holes need to be provided on it; the anode guide needle and the cathode guide needle each pass through one through hole; during the sleeve installation, it is necessary to ensure that the insulating insulating sheet is placed flat on the rolled edge of the outer shell. After the sleeve installation is completed, the sleeve shrinks, thus fixing the insulating insulating sheet to the rolled edge of the outer shell. Example 2

[0024] In this embodiment, as Figure 3 As shown, the insulating separator and the rubber stopper are connected by sealant; the sealant fills the space between the insulating separator and the rubber stopper. The sealant further enhances the sealing effect between the rubber stopper and the outer shell, as well as the anode and cathode leads; simultaneously, the sealant further secures the insulating separator, preventing it from falling off the aluminum electrolytic capacitor. The other parts of this embodiment are the same as in Embodiment 1. Example 3

[0025] like Figure 4As shown, the aluminum electrolytic capacitor in this embodiment is a horn-shaped aluminum electrolytic capacitor with a cover plate as the sealing element and an annular insulating sheet. In the horn-shaped capacitor, the explosion-proof valve can be set at the bottom of the shell or on the cover plate. When the explosion-proof valve is set on the cover plate, the annular insulating sheet can allow the explosion-proof valve on the cover plate to be exposed, so that the setting of the insulating sheet does not affect the explosion-proof valve.

Claims

1. An aluminum electrolytic capacitor with good isolation effect from the circuit board, comprising a shell, a core, and a sealing element, wherein the core is sealed inside the shell by the sealing element, and a sleeve is provided on the shell; characterized in that: The opening end of the outer shell is sealed to the sealing element by a rolled edge. An insulating isolation sheet is provided on the rolled edge of the outer shell. The insulating isolation sheet is fixed after being thermoplastic formed by a sleeve.

2. The aluminum electrolytic capacitor with good isolation effect from the circuit board according to claim 1, characterized in that: The thickness of the insulating sheet is between 0.05 mm and 0.15 mm.

3. The aluminum electrolytic capacitor with good isolation effect from the circuit board according to claim 1, characterized in that: The insulating insulating sheet and the sealing element are connected by sealant.

4. The aluminum electrolytic capacitor with good isolation effect from the circuit board according to claim 3, characterized in that: The sealant fills the space between the insulating insulating sheet and the sealant.

5. The aluminum electrolytic capacitor with good isolation effect from the circuit board according to claim 1, characterized in that: The insulating separator is circular or ring-shaped.

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