Ox horn type aluminum electrolytic capacitor with low thermal resistance and vibration resistance

Abstract

The utility model discloses a low-thermal-resistance vibration-resistant ox horn type aluminum electrolytic capacitor, and particularly relates to the technical field of ox horn type aluminum electrolytic capacitors, the ox horn type aluminum electrolytic capacitor comprises an aluminum shell, a core bag is arranged in the aluminum shell, and two aluminum washers are arranged at the upper end of the core bag. According to the utility model, through the arrangement of the cathode foil extension structure, the axial thermal resistance of the capacitor core cladding can be reduced, heat can be more efficiently conducted out along the axial direction, and accumulation of heat in the core cladding is reduced, so that the problem of temperature rise caused by heat generated by ripple current is relieved, and the service life of the capacitor is prolonged. And secondly, the outer surface of the aluminum shell is provided with the pressing grooves, so that the direct radial thermal resistance between the core cladding and the shell can be reduced, a smoother path is opened for heat transfer from the core cladding to the shell, the overall heat dissipation efficiency is further improved, the temperature rise caused by the ripple current is effectively controlled, and the service life of the capacitor is prolonged. And the service life of the capacitor is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of horn type aluminum electrolytic capacitor, specifically relates to a low thermal resistance vibration resistance horn type aluminum electrolytic capacitor. BACKGROUND

[0002] The lead terminal of the horn type aluminum electrolytic capacitor is in the shape of a horn, generally comprises a shell, a capacitor core package installed inside the shell, a cover plate for packaging the capacitor core package in the shell, and a terminal assembly installed on the cover plate, and is widely used in consumer electronic products, communication products, computers and peripheral products, new energy, automation control, automobile industry, optoelectronic products, high-speed railway and aviation and military equipment fields, and is a key component restricting the quality and reliability of the whole machine.

[0003] However, in the actual circuit operation process of the horn type aluminum electrolytic capacitor, the ripple current flowing through the aluminum electrolytic capacitor is inevitable, and the existence of the ripple current causes heat to be generated inside the capacitor, which not only affects the performance stability of the capacitor itself, but also accelerates the deterioration process of the internal materials, for example, excessive temperature may cause the electrolyte to dry up, the electrode material to corrode, etc., thereby shortening the service life of the capacitor and reducing its reliability, and even may cause the failure of the capacitor, which seriously threatens the normal operation of the entire electronic device, therefore, a low thermal resistance vibration resistance horn type aluminum electrolytic capacitor is proposed. SUMMARY

[0004] The utility model aims at providing a low thermal resistance vibration resistance horn type aluminum electrolytic capacitor to solve the above-mentioned shortcomings in the art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a low thermal resistance vibration resistance horn type aluminum electrolytic capacitor, comprising an aluminum shell, the inside of the aluminum shell is provided with a core package, the upper end of the core package is provided with two aluminum wafers, the two aluminum wafers are respectively connected with positive and negative pins, the upper end surface of the aluminum shell is connected with a cover plate at the opening, the lower end surface of the cover plate is connected with a rubber plug, the core package is provided with adhesive tape, the outer wall of the aluminum shell is provided with a pressing groove, and the lower end of the core package and inside the aluminum shell is provided with a negative extension structure.

[0006] Through the above technical scheme:

[0007] The negative electrode extension structure can reduce the axial thermal resistance of the capacitor core pack, enabling more efficient axial heat conduction, reducing heat accumulation inside the core pack, thereby alleviating the temperature rise problem caused by ripple current heat, effectively controlling the temperature rise caused by ripple current, ensuring capacitor performance stability and extending life, improving the ripple current resistance of the aluminum electrolytic capacitor, (Note: The negative electrode extension structure can be similar to an extension plate shape, extending from the negative electrode of the capacitor core pack, like a flat metal sheet. This sheet structure can effectively increase the heat conduction area, especially in the axial direction, when it comes into contact with the aluminum shell or other heat dissipation components, the larger flat area can better conduct the heat generated by the core pack, like a heat sink fin. Secondly, the negative electrode extension structure can also be composite, composed of multiple layers of foil or combined with other heat-conducting materials such as heat-conducting glue and heat-conducting fibers. Multiple layers of foil can further increase the heat conduction path and area, while the combination with heat-conducting materials can enhance the heat conduction performance, especially when heat needs to be quickly transferred to a certain heat dissipation area of the aluminum shell).

[0008] Preferably, the outer surface of the aluminum shell is provided with an electromagnetic shielding reinforcing structure, which comprises a first fixed ring, a second fixed ring and a third fixed ring sleeved on the outer surface of the aluminum shell, the first fixed ring, the second fixed ring and the third fixed ring are provided with two respectively, the second fixed ring is provided with a reinforcing net between the first fixed ring and the third fixed ring respectively, and the outer surface of the electromagnetic shielding reinforcing structure 11 is sleeved with an aluminum cover 16.

[0009] Preferably, the reinforcing net comprises a plurality of vertical ribs fixedly connected to the second fixed ring at equal intervals and uniformly, one end of the plurality of vertical ribs away from the second fixed ring is connected with the second fixed ring and the third fixed ring respectively, and the outer wall of the vertical rib is connected with a horizontal rib, and the inner wall of the horizontal rib is provided with a matching embedding groove.

[0010] Preferably, the end of the first fixed ring, the second fixed ring and the third fixed ring on one side is provided with a splicing groove respectively, and the end of the first fixed ring, the second fixed ring and the third fixed ring on the other side is connected with a splicing block matched with the splicing groove, the splicing block is threadedly connected with a fastening screw, and the outer wall of the splicing groove is provided with a screw groove matched with the fastening screw.

[0011] Preferably, the end of the horizontal rib on one side is provided with a slot, and the end of the horizontal rib on the other side is connected with a plug matched with the slot.

[0012] Specifically, the splicing blocks at the end of the first fixing ring, the second fixing ring and the third fixing ring on one side are inserted into the splicing grooves at the end of the first fixing ring, the second fixing ring and the third fixing ring on the other side, and finally the fastening screws are screwed into the screw grooves, so that the electromagnetic shielding reinforcing structure is sleeved on the outside of the aluminum shell. While splicing, the insertion blocks at the end of the transverse ribs on one side are inserted into the insertion grooves at the end of the transverse ribs on the other side, so that the firmness of the electromagnetic shielding reinforcing structure after splicing is ensured.

[0013] Through the above technical scheme:

[0014] When in use, the reinforcing net formed by the transverse ribs and the vertical ribs plays a very key role. The reinforcing net has a unique structure design, and each rib supports each other to form a stable and efficient stress dispersion system, so that the stress borne by the aluminum shell can be evenly distributed to the entire reinforcing net, the sectional moment of inertia of the aluminum shell is improved, the vibration resistance of the capacitor is improved, the torsional and circumferential stress resistance of the aluminum shell is enhanced in a vibration environment, and the capacitor can still stably and reliably operate under severe vibration conditions, and the risk of internal element damage or connection loosening caused by vibration is greatly reduced.

[0015] Preferably, the vertical ribs and the transverse ribs each comprise a base material layer and an electromagnetic shielding coating layer, and the electromagnetic shielding coating layer is coated on the outer wall of the base material layer.

[0016] Specifically, the electromagnetic shielding coating layer is coated on the outer surface of the base material layer (the electromagnetic shielding coating layer is a ferrite particle coating), so that the reinforcing net has an electromagnetic shielding function, can efficiently absorb and reflect electromagnetic radiation, can reduce the influence of electromagnetic interference, and can ensure the electromagnetic compatibility and stable operation of the entire electronic system.

[0017] In the above technical scheme, the technical effects and advantages of the present application are provided:

[0018] 1、By setting the negative pole foil extension structure, the axial thermal resistance of the capacitor core package can be reduced, so that heat can be more efficiently conducted along the axial direction, reducing the accumulation of heat inside the core package, thereby alleviating the temperature rise problem caused by the heat generated by the ripple current, helping to improve the ripple current resistance and delay the internal material degradation, secondly, the pressure groove opened on the outer surface of the aluminum shell can reduce the direct radial thermal resistance of the core package and the shell, opening up a smoother path for heat transfer from the core package to the shell, further improving the overall heat dissipation efficiency, effectively controlling the temperature rise caused by the ripple current, ensuring the performance stability of the capacitor and prolonging the service life, furthermore, the turbulence degree is enhanced at the concave surface during air cooling, improving the heat dissipation effect and reducing the risk of heat accumulation caused by the ripple current, finally, the fixing ability of the core package can also be enhanced, and the vibration resistance of the capacitor is improved;

[0019] 2、By the electromagnetic shielding reinforcing structure, when in use, the aluminum electrolytic capacitor can be provided with strong support and the stress borne by the aluminum electrolytic capacitor can be dispersed, the sectional moment of inertia of the aluminum shell is effectively increased, the problem of dramatic increase in weight caused by the large thickness is avoided, the anti-vibration performance of the aluminum electrolytic capacitor is improved under the premise of only a small increase in weight, and the anti-torsion and anti-circumferential stress capabilities of the aluminum shell are also enhanced, the overall anti-vibration capability of the horn-shaped aluminum electrolytic capacitor is improved, so that the capacitor can always maintain a stable and reliable working state even in a complex and strong vibration environment, secondly, the electromagnetic shielding coating can efficiently absorb and reflect electromagnetic radiation, effectively reducing the influence of electromagnetic interference on the capacitor and other components, avoiding a series of problems such as signal distortion and equipment failure caused by electromagnetic interference, and ensuring the electromagnetic compatibility and stable operation of the entire electronic system. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0022] Figure 2 It is a schematic diagram of the plane section of the present application.

[0023] Figure 3 It is a schematic diagram of the electromagnetic shielding reinforcing structure of the present application.

[0024] Figure 4 It is an enlarged schematic diagram of the connection end structure of the electromagnetic shielding reinforcing structure of the present application.

[0025] Figure 5 The transverse ribs and vertical ribs are split schematic views of the utility model.

[0026] Mark explanation:

[0027] 1, aluminum shell; 2, core package; 3, aluminum bushing; 4, positive electrode pin; 5, negative electrode pin; 6, cover plate; 7, rubber plug; 8, adhesive tape; 9, pressing groove; 10, negative electrode extension structure; 11, electromagnetic shielding reinforcing structure; 111, first fixing ring; 112, second fixing ring; 113, third fixing ring; 114, reinforcing net; 1141, transverse rib; 1142, vertical rib; 1143, embedding groove; 115, splicing groove; 116, splicing block; 117, fastening screw; 118, screw groove; 12, base material layer; 13, electromagnetic shielding coating; 14, insertion groove; 15, insertion block; 16, aluminum cover. Specific implementation

[0028] In order to make the technical personnel in the field better understand the technical scheme of the utility model, the utility model will be further introduced in detail below in combination with the drawings.

[0029] The utility model provides a kind of low-thermal-resistance vibration-resistant horn type aluminum electrolytic capacitor as shown in Figure 1 And Figure 2 As shown in a kind of low-thermal-resistance vibration-resistant horn type aluminum electrolytic capacitor, comprising:

[0030] Aluminum shell 1, the inside of aluminum shell 1 is equipped with core package 2, the upper end of core package 2 is equipped with two aluminum bushings 3, two aluminum bushings 3 are respectively connected with positive electrode pin 4 and negative electrode pin 5, the upper end surface opening of aluminum shell 1 is connected with cover plate 6, the lower end surface of cover plate 6 is connected with rubber plug 7, core package 2 is equipped with adhesive tape 8, the outer wall of aluminum shell 1 is provided with pressing groove 9, the lower end of core package 2 and inside aluminum shell 1 is equipped with negative electrode extension structure 10.

[0031] Through the above technical scheme:

[0032] The negative electrode extension structure 10 can reduce the axial thermal resistance of the capacitor core package, so that the heat can be conducted out along the axial direction more efficiently, and the heat accumulation in the core package 2 is reduced, so as to alleviate the temperature rise problem caused by the heat generated by the ripple current. The pressure groove 9 opened on the outer surface of the aluminum shell 1 can reduce the direct radial thermal resistance between the core package 2 and the aluminum shell 1, further improve the overall heat dissipation efficiency, effectively control the temperature rise caused by the ripple current, ensure the performance stability of the capacitor and prolong the service life, improve the ripple current resistance of the aluminum electrolytic capacitor, and (note: the negative electrode extension structure 10 can be similar to an extension plate, which extends from the negative electrode of the capacitor core package, like a flat metal sheet. This sheet structure can effectively increase the heat conduction area, especially in the axial direction. When it is in contact with the aluminum shell 1 or other heat dissipation components, the large plane area can better conduct the heat generated by the core package 2 out, like a fin of a heat sink. Secondly, the negative electrode extension structure 10 can also be composite, which is composed of multiple layers of foil or combined with other heat-conducting glue, heat-conducting fibers and other heat-conducting materials. Multiple layers of foil can further increase the heat conduction path and area, and the combination with heat-conducting materials can enhance the heat conduction performance, especially when the heat needs to be quickly transferred to a certain heat dissipation area of the aluminum shell 1).

[0033] The utility model provides a low heat resistance vibration resistant horn type aluminum electrolytic capacitor as Figure 1 And Figure 3 The utility model discloses a low heat resistance vibration resistant horn type aluminum electrolytic capacitor, the outside of aluminum shell 1 is equipped with electromagnetic shield type reinforcing structure 11, and the electromagnetic shield type reinforcing structure 11 includes the first fixed ring 111, second fixed ring 112 and third fixed ring 113 of sleeve setting at the outside of aluminum shell 1, and the first fixed ring 111, second fixed ring 112 and third fixed ring 113 are equipped with two respectively, and the second fixed ring 112 is equipped with reinforcing net 114 between the first fixed ring 111 and third fixed ring 113 respectively, and the outside of electromagnetic shield type reinforcing structure 11 is inserted with aluminum cover 16.

[0034] The reinforcing net 114 includes a plurality of vertical ribs 1142 fixedly connected to the second fixed ring 112 at equal intervals and uniformly, the ends of the plurality of vertical ribs 1142 away from the second fixed ring 112 are connected to the second fixed ring 112 and the third fixed ring 113 respectively, the outer wall of the vertical rib 1142 is connected with a horizontal rib 1141, and the inner side wall of the horizontal rib 1141 is provided with a matching groove 1143 matched with the vertical rib 1142.

[0035] Further, refer to Figure 3 And Figure 4As shown, the end of the first fixing ring 111, the second fixing ring 112 and the third fixing ring 113 on one side is respectively provided with a splicing groove 115, and the end of the first fixing ring 111, the second fixing ring 112 and the third fixing ring 113 on the other side is connected with a splicing block 116 matched with the splicing groove 115, the splicing block 116 is threadedly connected with a fastening screw 117, and the outer wall of the splicing groove 115 is provided with a screw groove 118 matched with the fastening screw 117.

[0036] The end of the transverse rib 1141 on one side is provided with a plug groove 14, and the end of the transverse rib 1141 on the other side is connected with a plug block 15 matched with the plug groove 14.

[0037] Specifically, the splicing block 116 at the end of the first fixing ring 111, the second fixing ring 112 and the third fixing ring 113 on one side is inserted into the splicing groove 115 at the end of the first fixing ring 111, the second fixing ring 112 and the third fixing ring 113 on the other side, and finally the fastening screw 117 is screwed into the screw groove 118, so that the electromagnetic shielding reinforcing structure 11 can be sleeved on the outside of the aluminum shell 1. While splicing, the plug block 15 at the end of the transverse rib 1141 on one side is inserted into the plug groove 14 at the end of the transverse rib 1141 on the other side, so that the firmness of the electromagnetic shielding reinforcing structure 11 after splicing can be ensured.

[0038] Through the above technical solution:

[0039] In use, the reinforcing net 114 formed by the transverse ribs 1141 and the vertical ribs 1142 plays a very key role. The unique structural design of the reinforcing net 114, the mutual support between the ribs, forms a stable and efficient stress dispersion system, so that the stress borne by the aluminum shell 1 can be evenly distributed to the entire reinforcing net 114, improving the section moment of inertia of the aluminum shell 1 and the anti-vibration performance of the capacitor. In a vibrating environment, the torsional and circumferential stress resistance of the aluminum shell 1 is enhanced, ensuring that the capacitor can still operate stably and reliably under harsh vibration conditions, greatly reducing the risk of internal component damage or connection loosening caused by vibration.

[0040] Further, referring to Figure 5 As shown, the vertical rib 1142 and the transverse rib 1141 respectively include a base material layer 12 and an electromagnetic shielding coating layer 13, and the electromagnetic shielding coating layer 13 is coated on the outer wall of the base material layer 12.

[0041] Specifically, the electromagnetic shielding coating layer 13 is coated on the outer surface of the base material layer 12 (the electromagnetic shielding coating layer 13 is a coating of ferrite particles), so that the reinforcing net 114 has electromagnetic shielding function and can efficiently absorb and reflect electromagnetic radiation, reducing the influence of electromagnetic interference and ensuring the electromagnetic compatibility and stable operation of the entire electronic system.

[0042] Certain exemplary embodiments of this application are described herein by way of illustration, and not limitation, and it is to be understood that the application can be carried out by using various means, compositions, and procedures and that specific embodiments described herein are simply illustrative of exemplary embodiments of the application as claimed. The specific embodiments provided herein are illustrative only and not limiting of the application as claimed. Certain changes and modifications can be practiced, which should be self-evident by those having the benefit of this disclosure, and it is understood that the application disclosed herein is capable of further modifications and changes in various aspects, all without departing from the spirit and scope of the present application.

Claims

1. A low thermal resistance vibration resistant cowhorn type aluminum electrolytic capacitor characterized by, Include: Aluminum shell (1), the inside of the aluminum shell (1) is provided with a core package (2), the upper end of the core package (2) is provided with two aluminum buss (3), two aluminum buss (3) is respectively connected with positive electrode pin (4) and negative electrode pin (5), the upper end surface of the aluminum shell (1) is connected with the cover plate (6), the lower end surface of the cover plate (6) is connected with rubber plug (7), the core package (2) is provided with adhesive tape (8); The outer wall of the aluminum shell (1) is provided with a pressing groove (9), and the lower end of the core package (2) and the inside of the aluminum shell (1) are provided with a negative electrode extension structure (10).

2. A low thermal resistance vibration resistant cowhorn type aluminum electrolytic capacitor as claimed in claim 1, characterized in that: The outside of the aluminum shell (1) is provided with an electromagnetic shielding reinforcing structure (11), the electromagnetic shielding reinforcing structure (11) includes a first fixed ring (111), a second fixed ring (112) and a third fixed ring (113) sleeved on the outside of the aluminum shell (1), the first fixed ring (111), the second fixed ring (112) and the third fixed ring (113) are provided with two respectively, the second fixed ring (112) is provided with a reinforcing net (114) between the first fixed ring (111) and the third fixed ring (113) respectively, the outside of the electromagnetic shielding reinforcing structure (11) is inserted with an aluminum cover (16).

3. A low thermal resistance vibration resistant cowhorn electrolytic capacitor according to claim 2, characterized in that: The reinforcing net (114) includes a plurality of vertical ribs (1142) fixedly connected to the second fixed ring (112) at equal intervals and uniformly, one end of the plurality of vertical ribs (1142) away from the second fixed ring (112) is connected with the second fixed ring (112) and the third fixed ring (113) respectively, the outer wall of the vertical rib (1142) is connected with a horizontal rib (1141), the inner side wall of the horizontal rib (1141) is provided with an embedding groove (1143) matched with the vertical rib (1142).

4. A low thermal resistance vibration resistant cowhorn electrolytic capacitor according to claim 3, characterized in that: The end of the first fixed ring (111), the second fixed ring (112) and the third fixed ring (113) on one side is respectively provided with a splicing groove (115), the end of the first fixed ring (111), the second fixed ring (112) and the third fixed ring (113) on the other side is connected with a splicing block (116) matched with the splicing groove (115), the splicing block (116) is threadedly connected with a fastening screw (117), the outer wall of the splicing groove (115) is provided with a screw groove (118) matched with the fastening screw (117).

5. A low thermal resistance, vibration resistant, cowhorn electrolytic capacitor according to claim 4, wherein: The end of the horizontal rib (1141) on one side is provided with a slot (14), and the end of the horizontal rib (1141) on the other side is connected with a plug (15) matched with the slot (14).

6. A low thermal resistance, vibration resistant, cowhorn electrolytic capacitor according to claim 5, wherein: The vertical rib (1142) and the horizontal rib (1141) respectively include a base material layer (12) and an electromagnetic shielding coating layer (13), and the electromagnetic shielding coating layer (13) is coated on the outer wall of the base material layer (12).

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