Low-temperature-resistant aluminum electrolytic capacitor

Abstract

A low-temperature-resistant aluminum electrolytic capacitor comprises an aluminum shell, a cover plate and a lead are installed at the upper end of the aluminum shell, a core bag is installed in the aluminum shell and formed by winding an anode foil, a cathode foil and electrolytic paper, the two sides of the anode foil and the two sides of the cathode foil are each provided with a layer of electrolytic paper, and the electrolytic paper comprises base layer paper and multiple fiber adsorption layers. The fiber adsorption layer comprises upper-layer fibers and lower-layer fibers, the upper-layer fibers and the lower-layer fibers are processed through electrostatic spinning, the upper-layer fibers and the lower-layer fibers are arranged in a crossed mode, and liquid guide holes are evenly distributed in the base layer paper. Compared with the prior art, the low-temperature-resistant aluminum electrolytic capacitor provided by the utility model adopts a plurality of fiber adsorption layers, the electrolyte adsorption capacity is increased, and meanwhile, the liquid guide holes are uniformly distributed on the base paper, so that the loss of the electrolyte after impregnation is reduced, the electrostatic capacity of the aluminum electrolytic capacitor is improved, and the performance of the aluminum electrolytic capacitor in a low-temperature state is ensured.

Description

Technical Field

[0001] The utility model relates to the field of capacitor production and manufacturing, in particular to a low-temperature resistant aluminum electrolytic capacitor. Background Art

[0002] Aluminum electrolytic capacitors are energy storage components. The temperature range of general capacitors is -20℃~80℃. Within the temperature range, aluminum electrolytic capacitors can be used normally. In special areas, such as northern my country, the temperature can drop to -40℃ or even lower. The electrolytic paper inside ordinary aluminum electrolytic capacitors is made of high-density material, which has insufficient adsorption capacity for electrolyte. It is easy to cause the electrostatic capacitance of the capacitor to decrease due to insufficient electrolyte content at low temperatures and the capacitor life to fail prematurely, causing the terminal equipment to be unable to be used normally. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a low temperature resistant aluminum electrolytic capacitor in view of the deficiencies of the above-mentioned prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A low-temperature resistant aluminum electrolytic capacitor comprises an aluminum shell, a cover plate and a lead are installed on the upper end of the aluminum shell, a core package is installed inside the aluminum shell, the core package is formed by winding an anode foil, a cathode foil and electrolytic paper, a layer of electrolytic paper is arranged on both sides of the anode foil and the cathode foil, the electrolytic paper comprises a base paper and a multi-layer fiber adsorption layer, the fiber adsorption layer comprises an upper fiber layer and a lower fiber layer, the upper fiber layer and the lower fiber layer are processed by electrostatic spinning, the upper fiber layer and the lower fiber layer are cross-arranged, and the base paper is evenly distributed with liquid guide holes.

[0006] Furthermore, the fibers of the lower fiber layer are arranged in a 130° to 140° twill manner, and the fibers of the upper fiber layer are arranged in a 40° to 50° twill manner.

[0007] Furthermore, 2 to 4 fiber adsorption layers are arranged on the electrolytic paper.

[0008] Furthermore, the liquid conducting hole is funnel-shaped, with the large hole of the liquid conducting hole facing outward and the small hole facing the lower fiber layer.

[0009] Furthermore, the base paper of the outermost electrolytic paper of the core package is exposed to the outside.

[0010] Compared with the prior art, the utility model provides a low-temperature resistant aluminum electrolytic capacitor, which adopts a multi-layer fiber adsorption layer to increase the electrolyte adsorption capacity. At the same time, liquid guide holes are evenly distributed on the base paper to reduce the loss of electrolyte after impregnation, improve the electrostatic capacity of the aluminum electrolytic capacitor, and ensure its performance under low temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a structural schematic diagram of the core package of the utility model;

[0013] Figure 3 It is a structural schematic diagram of the electrolytic paper of the utility model;

[0014] Figure 4 It is a structural schematic diagram of the arrangement of the upper fiber layer and the lower fiber layer in the electrolytic paper of the utility model;

[0015] Among them, 1. aluminum shell, 2. cover plate, 3. lead, 4. core package, 5. anode foil, 6. cathode foil, 7. electrolytic paper, 8. base paper, 9. fiber adsorption layer, 10. liquid guide hole, 911. upper fiber, 912. lower fiber. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present utility model will be described clearly and completely below.

[0017] like Figure 1 to Figure 4 As shown, a low-temperature resistant aluminum electrolytic capacitor comprises an aluminum shell 1, a cover plate 2 and a lead 3 are installed on the upper end of the aluminum shell 1, a core package 4 is installed inside the aluminum shell 1, and the core package 4 is formed by winding an anode foil 5, a cathode foil 6 and an electrolytic paper 7. In this embodiment, a layer of electrolytic paper 7 is arranged on both sides of the anode foil 5 and the cathode foil 6, that is, two layers of electrolytic paper wrap a layer of anode foil, and two layers of electrolytic paper wrap a layer of cathode foil, and then the wrapped anode foil and cathode foil are wound into a core package, which improves the breakdown voltage on the one hand and improves the adsorption performance of the electrolyte on the other hand.

[0018] The electrolytic paper 7 includes a base paper 8 and a multi-layer fiber adsorption layer 9, the fiber adsorption layer 9 includes an upper fiber layer 911 and a lower fiber layer 912, the upper fiber layer 911 and the lower fiber layer 912 are processed by electrostatic spinning, wherein the upper fiber layer 911 and the lower fiber layer 912 are cross-arranged to improve the adsorption performance of the fiber adsorption layer to the electrolyte.

[0019] In this embodiment, during the electrospinning process, the lower fiber layer 911 arranges the fibers in a 130° to 140° twill manner, while the upper fiber layer 912 arranges the fibers in a 40° to 50° twill manner to achieve a cross arrangement.

[0020] In some embodiments, 2 to 4 fiber adsorption layers are disposed on the base paper 8, which are selected according to the electrostatic capacity of the capacitor.

[0021] As another improvement of the present invention, liquid conducting holes 10 are evenly distributed on the base paper 8, and the liquid conducting holes 10 are funnel-shaped, with large holes facing outward and small holes facing downward. The fiber layer 912 is impregnated after the electrode foil and the electrolytic paper are made into a core package. Since the liquid conducting holes are funnel-shaped, with large holes facing outward and small holes facing inward, the electrolyte can be further locked.

[0022] In this embodiment, the base paper of the outermost electrolytic paper of the core package 4 is exposed to the outside, which can better lock the electrolyte in the core package and improve the electrostatic capacity.

[0023] The present invention is not limited to the described embodiments. Those skilled in the art may make some modifications or changes without departing from the spirit and scope of the present invention, that is, within the scope of disclosure. Therefore, the scope of protection of the present invention shall be subject to the scope defined in the claims.

Claims

1. A low temperature resistant aluminum electrolytic capacitor, comprising an aluminum shell, a cover plate and a lead wire are installed on the upper end of the aluminum shell, a core package is installed inside the aluminum shell, and the core package is wound by an anode foil, a cathode foil and an electrolytic paper, characterized in that: A layer of electrolytic paper is arranged on both sides of the anode foil and the cathode foil. The electrolytic paper includes a base paper and a multi-layer fiber adsorption layer. The fiber adsorption layer includes an upper fiber layer and a lower fiber layer. The upper fiber layer and the lower fiber layer are processed by electrostatic spinning. The upper fiber layer and the lower fiber layer are arranged crosswise. The base paper is evenly distributed with liquid guide holes.

2. The low temperature resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The fibers of the lower fiber layer are arranged in a 130° to 140° twill manner, and the fibers of the upper fiber layer are arranged in a 40° to 50° twill manner.

3. The low temperature resistant aluminum electrolytic capacitor according to claim 1, characterized in that: 2 to 4 fiber adsorption layers are arranged on the electrolytic paper.

4. The low temperature resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The liquid-conducting hole is funnel-shaped, with the large hole facing outward and the small hole facing the lower fiber layer.

5. The low temperature resistant aluminum electrolytic capacitor according to claim 4, characterized in that: The base paper of the outermost electrolytic paper of the core package is exposed on the outside.

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