Aluminum electrolytic capacitor module compatible with multiple heat dissipation configurations and installation modes

Abstract

The invention relates to an aluminum electrolytic capacitor module, which comprises a plurality of aluminum electrolytic capacitor monomers without insulating sleeves, a trapezoidal cubic metal heat conduction component and a ship-shaped open insulating shell, the capacitor monomers are arranged in a single row and in a straight line in the holes of the metal heat-conducting member to form a radial trapezoidal combined structure body of the capacitor; the structural body is put into a ship-shaped open insulating shell for half-surrounded insulating protection; and an exposed structural body plane parallel to the axial direction of the capacitor is a heat dissipation mounting surface. The technical scheme can adapt to the change of the requirement of a user for the electrostatic capacity of the capacitor module, can adapt to the installation of different heat dissipation devices, and can make a proper three-dimensional size design through vertical and horizontal installation on a circuit board, and especially, the change is realized under the manufacturing of one set of mold, so that a large amount of mold cost is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of small aluminum electrolytic capacitor module structure design, in particular to provide a small aluminum electrolytic capacitor module (module) design scheme with multiple flexible selection and compatible advantages in installation and heat dissipation. BACKGROUND

[0002] Aluminum electrolytic capacitors are important basic electronic components, and are widely used in many fields such as consumer electronics, industrial electrical appliances, automobiles, aviation and military industry.

[0003] Generally, aluminum electrolytic capacitors exist as single bodies. In order to cope with high power, the volume is continuously increased to improve the ripple current capacity. For example, snap-in and screw aluminum electrolytic capacitors. After the volume of the capacitor is increased, various aspects such as high frequency characteristics and unit capacity ripple current capacity will be reduced, and if a small volume aluminum electrolytic capacitor is used to form a module and a heat sink is added to form an aluminum electrolytic capacitor module, it will have higher efficiency than using a large single aluminum electrolytic capacitor.

[0004] Generally, the capacitor module can be disassembled and replaced for individual capacitor single body maintenance. When the product is improved in reliability, such as adding glue filling, press machine press fitting and other processes, the single body cannot be disassembled and replaced for maintenance. At this time, the module is more appropriate. Among various constitutions of small aluminum electrolytic capacitor modules, the centralized insulation type aluminum electrolytic capacitor module of patent 202110059122.8 has the advantages of simplified process, high reliability, low cost, etc.

[0005] Due to wide use, such as high power and low power (determined by the number of integrated capacitors), high voltage and low voltage (determined by the parallel and series connection of sub-units inside the module and between modules), and various scenarios such as vehicles, aviation, etc., the module capacitor itself needs to be adapted to the use characteristics of installation and heat dissipation, etc.

[0006] Because there are many problems involved, the universality of the capacitor module product is very important. Using a design with good compatibility to deal with as many specific use cases as possible can provide convenience and reduce costs for capacitor module manufacturers and users. SUMMARY

[0007] The present application provides a centralized insulation type aluminum electrolytic capacitor module design compatible with multiple heat dissipation configurations and installation methods for low power use.

[0008] The technical scheme is as follows: an aluminum electrolytic capacitor module comprises a plurality of aluminum electrolytic capacitor units without insulation sleeves, a trapezoidal cuboid metal heat-conducting component and a "boat-shaped" open insulation shell; the capacitor units are arranged in a single row and are arranged in the nest holes of the metal heat-conducting component to form a capacitor combined structure with a trapezoidal radial direction; the combined structure is placed in the "boat-shaped" open insulation shell for semi-enclosed insulation protection; and the exposed surface of the combined structure parallel to the axial direction of the single-row capacitor is a heat dissipation mounting surface.

[0009] The number of capacitor units of the aluminum electrolytic capacitor module can be 2, 3, 4, 5, 6 or the like.

[0010] Specifically, after the aluminum electrolytic capacitor units are arranged in the metal heat-conducting component, the bottom pressure relief valve plane is inside the plane of the metal heat-conducting component, and the insulation shell forms an internal cavity of the metal heat-conducting component, so that the electrolyte cannot be sprayed outward when the pressure relief valve is opened.

[0011] Further, after the aluminum electrolytic capacitor units are arranged in the metal heat-conducting component, the electrode lead-out line end surface is lower than the plane of the metal heat-conducting component to form a pit, and electronic potting glue is poured into the pit to enhance the sealing performance of the aluminum electrolytic capacitor units.

[0012] The heat dissipation mounting surface of the aluminum electrolytic capacitor module is insulated and mounted for heat dissipation by using insulation heat-conducting sheets.

[0013] Specifically, the insulation heat-conducting sheets can be insulation heat-conducting silica gel cloth or insulation heat-conducting ceramics or other materials with voltage resistance and high heat conductivity.

[0014] The aluminum electrolytic capacitor module can be independently externally mounted with a finned heat sink, or can be installed and cooled by sharing a heat dissipation device with other capacitor modules or power semiconductors MOSFET / IGBT and the like.

[0015] Further, the aluminum electrolytic capacitor module is externally mounted with a finned heat sink, the heat sink is in a three-sided surrounding form to semi-enclose the capacitor module therein, and the heat sink uses the inner hook structure of the two side walls as a mounting rack for fastening by machine screws and T-shaped nuts, so that the surface area of the heat sink is increased and the installation space of the fixing screws is saved.

[0016] Specifically, the aluminum electrolytic capacitor can change the static capacity by changing the height of the capacitor under the condition that the diameter is unchanged, and the external heat sink and the metal heat-conducting component are manufactured by extrusion, so that only the length of the cut part needs to be changed to adapt to the change of the height of the capacitor, thereby saving a large amount of extrusion mold cost.

[0017] Further, the aluminum electrolytic capacitor module can be vertically installed or horizontally installed according to the need, under the condition that the radiator is fully cooled, thereby providing convenience for use design.

[0018] The centralized insulation type aluminum electrolytic capacitor module design scheme provided by the application is compatible with various heat dissipation configurations and installation modes, can be flexibly changed according to the need, can adapt to the change of the static capacity demand of the capacitor module by the user, can adapt to the installation of different heat dissipation devices, and can be designed in three dimensions through vertical or horizontal installation on the circuit board, especially the change is realized under the manufacturing of a set of molds, thereby saving a large amount of mold cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of an aluminum electrolytic capacitor single body loaded into a metal heat conduction member

[0020] Figure 2 is a schematic view of a combined structure loaded into an open insulation shell

[0021] Figure 3 is a schematic view of a capacitor module independently externally hung fin radiator

[0022] Figure 4 is a schematic view of vertical installation of a capacitor module

[0023] In the drawings, the numbers are:

[0024] 1, aluminum electrolytic capacitor single body

[0025] 11, pressure release valve

[0026] 12, electrode lead-out wire

[0027] 13, sealing rubber plug

[0028] 14, capacitor sealing measurement pit

[0029] 2, metal heat conduction member

[0030] 21 capacitor nest hole

[0031] 22 heat dissipation installation surface

[0032] 3, insulation shell

[0033] 4, independent radiator

[0034] 41 fin

[0035] 42 inner hook of surrounding plate

[0036] 43 fastener installation port

[0037] 44 machine screw T-shaped nut set

[0038] 5. Heat conducting insulating sheet DETAILED DESCRIPTION

[0039] The application will be further described in details by specific embodiments in conjunction with the accompanying drawings. In the following embodiments, many descriptions are made to make the application better understood. However, those skilled in the art can easily recognize that some features can be replaced by other materials, methods or omitted in different cases. In some cases, some related operations are not shown or described in the specification to avoid the core part of the application being overwhelmed by too much description, and those skilled in the art can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0040] The following is a preferred embodiment:

[0041] As shown in the drawings, three aluminum electrolytic capacitor monomers 1 without insulation sleeve are loaded into the nest holes 21 of the aluminum alloy member 2 to form a combined structure. To ensure that the capacitor monomers are in close contact with the heat conducting member, the combined structure can be pressed by a press after being loaded. Figure 1 The end surface of the lead-out wire of the capacitor monomer is lower than the plane of the aluminum alloy member to form a pit 14. Electronic potting glue is poured into the pit to strengthen the sealing performance of the electrolytic capacitor monomer.

[0042] The combined structure is roughly trapezoidal when viewed radially from the capacitor. The three capacitor monomers are arranged in a single row in straight line along the heat dissipation mounting surface.

[0043] As shown in the drawings, the pressure release valve plane 11 of the capacitor monomer is lower than the plane of the nest hole of the aluminum alloy member 2 to form an internal pit cavity of the aluminum alloy member.

[0044] Figure 2 The trapezoidal combined structure of the capacitor monomer and the aluminum alloy member can be easily placed into the open "boat-shaped" insulating shell 3 to form an insulating protection with four sides and a bottom. The heat dissipation mounting surface 22 on the upper side is used to assemble a heat dissipation device through the insulating heat conducting sheet 5.

[0045] As shown in the drawings, the upper side of the independent externally hung heat sink 4 is provided with heat dissipation fins 41, and both sides are provided with downward extending coaming and inner hook structure 42. The middle part is provided with fastener 44 mounting hole 43.

[0046] The upper side heat dissipation mounting surface 22 of the combined structure is insulated and isolated by the insulating heat conducting sheet 5, and then loaded into the semi-enclosed space of the heat sink from the side. The machine screw and T-shaped nut sleeve 44 are fastened and installed from the coaming inner hook opening 43. Figure 3 The upper side heat dissipation mounting surface 22 of the combined structure is insulated and isolated by the insulating heat conducting sheet 5, and then loaded into the semi-enclosed space of the heat sink from the side. The machine screw and T-shaped nut sleeve 44 are fastened and installed from the coaming inner hook opening 43.

[0047] The upper side heat dissipation mounting surface 22 of the combined structure is insulated and isolated by the insulating heat conducting sheet 5, and then loaded into the semi-enclosed space of the heat sink from the side. The machine screw and T-shaped nut sleeve 44 are fastened and installed from the coaming inner hook opening 43.

[0048] ​The placement direction shown in the figure is horizontal installation of the capacitor module, the PCB circuit board is located at the bottom of the capacitor module, and the capacitor lead is bent downward to be electrically connected to the mounting hole on the PCB circuit board.

[0049] As shown in Figure 4 , the capacitor module is vertically installed, and the capacitor lead is directly electrically connected to the mounting hole on the lower PCB circuit board.

[0050] All the above vertical and horizontal installations need other fixing parts for installation and reinforcement, which is determined according to the situation on the PCB circuit board, and cannot be fixed and installed only by the capacitor lead.

[0051] The aluminum alloy heat-conducting member and the externally-hung fin radiator in the illustrated case are manufactured by profile extrusion, and then processed according to the different static capacities and different heights of the capacitors to obtain corresponding lengths, so the design scheme has good flexibility and can save a lot of mold cost.

Claims

1. An aluminum electrolytic capacitor module compatible with various heat dissipation configurations and installation methods, comprising multiple aluminum electrolytic capacitor cells without insulating sleeves, trapezoidal cuboid metal heat-conducting components, and "boat-shaped" open insulating shells; the capacitor cells are arranged in a single row and installed in the holes of the metal heat-conducting components to form a radial trapezoidal composite structure of the capacitors; the structure is placed in the "boat-shaped" open insulating shell for semi-enclosed insulation protection; the exposed plane of the structure parallel to the capacitor axis is the insulating heat dissipation mounting surface.

2. The aluminum electrolytic capacitor module as described in claim 1, characterized in that... The number of individual capacitors mounted on independent metal heat-conducting components can be 1, 2, 3, 4, 5, 6, etc.

3. The aluminum electrolytic capacitor module as described in claim 1, characterized in that... After the aluminum electrolytic capacitor cell is installed in the metal heat-conducting component, the plane of its bottom pressure relief valve is below the plane of the metal heat-conducting component, forming an internal cavity of the metal heat-conducting component with the insulating shell, ensuring that the electrolyte will not splash outward when the pressure relief valve is open.

4. The aluminum electrolytic capacitor module as described in claim 1, characterized in that... After an aluminum electrolytic capacitor cell is installed into a metal thermally conductive substrate, the end face of its electrode lead is lower than the plane of the metal thermally conductive substrate, forming a pit. Electronic potting compound is poured into the pit to enhance the sealing performance of the electrolytic capacitor cell.

5. The aluminum electrolytic capacitor module as described in claim 1, characterized in that... The heat dissipation mounting surface uses an insulating thermally conductive sheet for external insulation to dissipate heat. The insulating thermally conductive sheet can be made of materials with voltage resistance and high thermal conductivity, such as insulating thermally conductive silicone cloth or insulating thermally conductive ceramic.

6. The aluminum electrolytic capacitor module as described in claim 1, characterized in that... It can be installed with an independent external finned heat sink, or it can be installed and cooled by sharing a heat sink with other capacitor modules or power semiconductor MOSFETs / IGBTs.

7. The aluminum electrolytic capacitor module external finned heat sink as described in claims 1 and 6, characterized in that... The heat sink surrounds the capacitor module on three sides, and uses the hook structure inside the two side panels as a mounting bracket for fastening with screws and T-nuts, which not only increases the surface area of ​​the heat sink but also saves space for fixing screws.

8. The aluminum electrolytic capacitor module as described in claim 1, characterized in that... You can choose to install it vertically or horizontally.

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