阅读说明：本技术 一种耐高温的电解电容器 (High-temperature-resistant electrolytic capacitor ) 是由 李唐 张明 田红波 于 2020-12-24 设计创作，主要内容包括：本申请涉及一种耐高温的电解电容器,其包括底座、与底座配合形成容纳腔的圆柱状的壳体、安装于容纳腔内的电容、以及在容纳腔内弹性连接壳体和底座的调节装置,所述底座上设置有环形凹槽,所述壳体嵌入环形凹槽并与环形凹槽螺纹连接,所述壳体的顶部设置有用于供电解液注入容纳腔的可控注入孔。本申请具有降低电解电容在高温环境下的故障率的效果。(The utility model relates to a high temperature resistance electrolytic capacitor, it includes the base, forms the cylindric casing that holds the chamber with the base cooperation, installs in the electric capacity that holds the intracavity and at the adjusting device who holds intracavity elastic connection casing and base, be provided with the annular groove on the base, casing embedding annular groove and annular groove threaded connection, the top of casing is provided with and is used for supplying electrolyte to pour into the controllable filling hole that holds the chamber into. The electrolytic capacitor has the effect of reducing the fault rate of the electrolytic capacitor in a high-temperature environment.)

1. The utility model provides a high temperature resistant electrolytic capacitor, its characterized in that includes base (1), forms cylindric casing (2) that hold chamber (21) with base (1) cooperation, installs electric capacity (3) in holding chamber (21) and adjusting device (4) of elastic connection casing (2) and base (1) in holding chamber (21), be provided with annular groove (11) on base (1), casing (2) embedding annular groove (11) and with annular groove (11) threaded connection, the top of casing (2) is provided with and is used for supplying electrolyte to pour into controllable filling hole (22) that hold chamber (21).

2. The high-temperature-resistant electrolytic capacitor as claimed in claim 1, wherein a top through hole (23) coaxial with the housing (2) is formed in the top of the housing (2), the adjusting device (4) comprises an upper pull rod (41) penetrating the top through hole (23) and rotatably connected with the top through hole (23), a rotary disc (42) located in the accommodating cavity (21) and arranged on the upper pull rod (41), and a spring (43) sleeved on the upper pull rod (41) and having two ends respectively welded to the upper pull rod (41) and the base (1), and a fixing component for fixing the rotary disc (42) is arranged on the inner side surface of the housing (2).

3. The high-temperature-resistant electrolytic capacitor as claimed in claim 2, wherein the cross section of the rotating disc (42) is oval, the fixing component comprises two projections (44) which are arranged on the top of the inner side surface of the shell (2) and used for being in interference fit with the rotating disc (42), the two projections (44) are symmetrically arranged relative to the axis of the shell (2), and the relative distance between the two projections (44) is greater than the minor axis length of the rotating disc (42) and less than the major axis length of the rotating disc (42).

4. The high-temperature-resistant electrolytic capacitor as claimed in claim 3, wherein the rotary disc (42) is provided with a dislocation hole (45), the shape of the dislocation hole (45) is matched with the shape of the controllable injection hole (22), the distance from the axis of the dislocation hole (45) to the axis of the shell (2) is equal to the distance from the axis of the top through hole (23) to the axis of the shell (2), and the dislocation hole (45) is in contraposition or dislocation with the controllable injection hole (22) to open or close the controllable injection hole (22).

5. The high-temperature resistant electrolytic capacitor as claimed in claim 4, wherein the capacitor (3) comprises two aluminum foils wound around each other, an electrolytic paper between the aluminum foils, and an electrolyte impregnated on the electrolytic paper, and the aluminum foils are wound on the upper pull rod (41).

6. The high-temperature-resistant electrolytic capacitor as claimed in claim 5, wherein the upper pull rod (41) is a conductive rod, the spring (43) is a conductive spring (43), the spring (43) is electrically connected with the upper pull rod (41), the surfaces of the upper pull rod (41) and the spring (43) are covered with an anticorrosive insulation layer, a section of the upper pull rod (41) welded between the upper pull rod (41) and the turntable (42) at the spring (43) is a thermistor, the base (1) is provided with a pin (5), the pin (5) and the spring (43) are welded at one end of the base (1) and electrically connected, and the upper end of the upper pull rod (41) is used for being connected with a circuit.

7. The high-temperature-resistant electrolytic capacitor as claimed in claim 1, characterized in that the outer side of the housing (2) is provided with heat-dissipating fins (24).

8. The high-temperature resistant electrolytic capacitor as claimed in claim 3, wherein the ratio of the lengths of the major axis and the minor axis of the turntable (42) is 1.01 to 1.04.

Technical Field

The application relates to the field of capacitors, in particular to a high-temperature-resistant electrolytic capacitor.

Background

With the rapid development of global economy, more and more of the chinese manufactured products are sold abroad. However, the capacitor suitable for China cannot meet the high temperature environment of foreign countries and regions in terms of high temperature resistance, especially the severe high temperature environment of countries such as Africa. A common structure of an electrolytic capacitor generally includes an aluminum case, an electrolytic paper wound in the case, and an electrolyte impregnated in the electrolytic paper.

In domestic environments, room temperature is generally low and good cooling and ventilation conditions are generally present, so that electrolytic capacitors have a low operating temperature. However, in the laggard areas of african countries, the electrolytic capacitors are often used in devices with simple structure and incomplete functions, which usually have the characteristics of poor heat dissipation and high heat generation, and have high working environment and poor working conditions. In the use process of the capacitor, the organic solvent of the electrolyte solution soaked in the electrolytic capacitor is evaporated, the electrolyte solution is decomposed by heat to generate evaporation gas, or the electrolyte solution is decomposed by electrochemical reaction to generate hydrogen or evaporation gas, so that the internal pressure of the electrolytic capacitor is increased to cause explosion.

In the related art, a method of providing an explosion-proof valve on an electrolytic capacitor is generally adopted so that an electrolyte is discharged when an overvoltage occurs in the capacitor. Thus, the entire capacitor needs to be replaced in time, but the inventor believes that the replacement and repair of the capacitor is very inconvenient in the African lagging areas, and therefore an electrolytic capacitor which can conveniently work in a high-temperature environment and has low failure rate is needed urgently.

Disclosure of Invention

In order to reduce the fault rate of the electrolytic capacitor in a high-temperature environment, the application provides a high-temperature-resistant electrolytic capacitor.

The application provides a high temperature resistant electrolytic capacitor adopts following technical scheme:

the utility model provides a high temperature resistant electrolytic capacitor, includes the base, forms the cylindric casing that holds the chamber with the base cooperation, installs in the electric capacity that holds the intracavity and holding the adjusting device of intracavity elastic connection casing and base, be provided with the annular groove on the base, casing embedding annular groove and with annular groove threaded connection, the top of casing is provided with and is used for supplying electrolyte to pour into the controllable filling hole that holds the chamber into.

Through adopting above-mentioned technical scheme, the base forms with the casing cooperation and holds the chamber, holds the chamber and is used for holding electric capacity, and electric capacity has electrolyte solution, and when electrolyte solution was heated and takes place the inflation, it will produce the interior pressure that is enough to lead to the casing to explode to hold the chamber, because casing and electric capacity threaded connection, consequently the casing will be at the effect partial back-out annular groove of interior pressure to the feasible chamber that holds grow is in order to reduce the interior pressure that holds the chamber. When electric capacity stop work, or when the environment radiating effect strengthens, hold the interior pressure reduction in chamber, because adjusting device elastic connection casing and base, consequently the casing will be at the effect of adjusting device lower screwing annular groove. The capacitor can be applied to the working condition that the ambient temperature is high and the requirement on the capacitance value precision of the capacitor is not high, can be self-adaptive at high temperature, and avoids the capacitor from being exploded to enable the whole electric appliance to be incapable of being used. In addition, the capacitor is of an assembly type structure, can be replaced or maintained simply, and has low requirements on maintenance conditions.

Preferably, the top of casing is provided with the top perforation coaxial with the casing, adjusting device including penetrate the top perforation and with the perforation rotate the last pull rod of being connected of top, be located hold the intracavity and set up the carousel on last pull rod and the cover locate on the pull rod and both ends weld respectively in the spring of last pull rod and base, the medial surface of casing is provided with the fixed subassembly that is used for fixed carousel.

Through adopting above-mentioned technical scheme, when the assembly, establish the spring housing on last pull rod earlier, weld the both ends of spring on base and last pull rod respectively again, then install the electric capacity on last pull rod. The upper end of the upper pull rod is passed through the top of the housing and the housing is then screwed into the annular groove with the spring in its natural stretched state. After the shell is screwed into the annular groove, the upper pull rod is pulled upwards until the top surface of the upper pull rod abuts against the shell, and at the moment, the spring is in a stretching state. And finally, fixing the turntable on the shell by using the fixing assembly.

Preferably, the cross section of carousel is oval, fixed subassembly including set up in two lugs that are used for with carousel interference fit at casing medial surface top, two the axis symmetry setting of the relative casing of lug, two the relative distance of lug is greater than the minor axis length of carousel and is less than the major axis length of carousel.

Through adopting above-mentioned technical scheme, when the carousel butt in the top of casing, rotate the carousel, until the major axis end butt lug of carousel and with lug interference fit, lug and carousel produce great frictional force and fix the top at the casing with the carousel.

Preferably, the turntable is provided with a dislocation hole, the shape of the dislocation hole is matched with that of the controllable injection hole, the distance from the axis of the dislocation hole to the axis of the shell is equal to the distance from the axis of the top through hole to the axis of the shell, and the dislocation hole is aligned or dislocated with the controllable injection hole to open or close the controllable injection hole.

Through adopting above-mentioned technical scheme, when the carousel butt when the top of casing, the adjustment carousel rotates, and until the dislocation hole is relative with controllable injection hole, electrolyte can hold the chamber through controllable injection hole and dislocation hole injection this moment, treats to live in full, rotates the carousel and makes controllable injection hole and dislocation hole stagger to close controllable injection hole.

Preferably, the capacitor comprises two pieces of aluminum foil wound around each other, electrolytic paper positioned between the aluminum foils, and electrolyte soaked in the electrolytic paper, and the aluminum foil is wound around the upper pull rod.

Preferably, the upper pull rod is a conductive rod, the spring is a conductive spring, the spring is electrically connected with the upper pull rod, the surface of the upper pull rod and the surface of the spring are covered with an anti-corrosion insulating layer, one section of the upper pull rod, which is welded between the upper pull rod and the turntable at the spring, is a thermistor, the base is provided with a pin, the pin and the spring are welded at one end of the base and electrically connected with each other, and the upper end of the upper pull rod is used for being connected with a circuit.

Through adopting above-mentioned technical scheme, pin, spring, last pull rod have constituted one section detection circuitry for detect the inside temperature of electric capacity, this detection circuitry can connect on the chip, makes the chip can come the circular telegram or the outage of control electric capacity based on the detected signal that this detection circuitry produced.

Preferably, the outer side surface of the shell is provided with heat radiating fins.

By adopting the technical scheme, the radiating fins are beneficial to outward radiation of the capacitor and temperature reduction.

Preferably, the ratio of the lengths of the long axis and the short axis of the rotating disc is 1.01-1.04.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the method is applied to the working conditions that the environment temperature is high and the requirement on the capacitance value precision of the capacitor is not high, can generate self-adaptation at high temperature, and avoids the capacitor from bursting to cause the whole electric appliance to be unusable;

2. the additional structure is few, the temperature of the capacitor can be monitored in real time, the power-on and power-off are controlled, and the stability of the capacitor is improved;

3. the whole body is of an assembly structure, can be simply replaced or maintained, and has low requirement on maintenance conditions.

Drawings

FIG. 1 is a schematic view of an electrolytic capacitor of high temperature resistance according to an embodiment of the present invention;

FIG. 2 is an exploded view of a high temperature resistant electrolytic capacitor according to an embodiment of the present application;

FIG. 3 is a schematic view of a high temperature resistant electrolytic capacitor of the present embodiment with the top of the case cut away;

fig. 4 is a schematic view of a base and an adjustment device in an embodiment of the present application.

Description of reference numerals:

1. a base; 11. an annular groove; 2. a housing; 21. an accommodating chamber; 22. a controllable injection hole; 23. perforating the top; 24. a heat dissipating fin; 3. a capacitor; 4. an adjustment device; 41. an upper pull rod; 42. a turntable; 43. a spring; 44. a bump; 45. a dislocation hole; 5. and (7) a pin.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a high-temperature-resistant electrolytic capacitor. Referring to fig. 1, the electrolytic capacitor includes a base 1 for connection to an electric circuit, a cylindrical case 2 fitted with the base 1 to form a receiving chamber 21, a capacitor 3 mounted in the receiving chamber 21 and fixed to the base 1, and an adjusting device 4 elastically connecting the case 2 and the base 1 in the receiving chamber 21.

Referring to fig. 1 and 2, the base 1 is in a disc shape, an annular groove 11 is formed in the base 1, threads are formed in the wall of the annular groove 11, and the shell 2 is embedded in the annular groove 11 and is in threaded connection with the annular groove 11. The housing 2 is a cylindrical aluminum shell, and the outer side surface of the housing 2 is provided with heat dissipation fins 24, in this embodiment, the heat dissipation fins 24 are integrally connected with the housing 2, and the axis of the housing 2 coincides with the central axis of the annular groove 11. The capacitor 3 comprises two aluminum foils wound around each other, electrolytic paper positioned between the aluminum foils, and electrolyte soaked on the electrolytic paper, wherein the electrolytic paper is used for insulating the two aluminum foils from each other. Three pins 5 are arranged at the bottom of the base 1 in a penetrating manner, and two of the pins 5 are respectively and electrically connected to the two aluminum foils.

Referring to fig. 2, the top of the housing 2 is provided with a top through-hole 23, and the top through-hole 23 is a circular hole and is coaxial with the housing 2. Referring to fig. 2 and 4, the adjusting device 4 includes an upper rod 41, a rotary disc 42 and a spring 43, the upper rod 41 is a round rod, the upper rod 41 penetrates through the top through hole 23 and is rotatably connected with the top through hole 23, and the diameter of the upper rod 41 is matched with that of the top through hole 23 in order to prevent liquid leakage.

The cross section of the rotary disk 42 is an ellipse, which is positioned in the accommodating cavity 21 and is coaxially arranged with the upper pull rod 41, and in the embodiment, the rotary disk 42 is integrally connected with the upper pull rod 41. In order to fix the turntable 42 to the housing 2, the inner side of the housing 2 is provided with a fixing assembly for fixing the turntable 42. The fixing component comprises two lugs 44 arranged at the top of the inner side surface of the shell 2, the two lugs 44 are symmetrically arranged relative to the axis of the shell 2, the relative distance between the two lugs 44 is greater than the minor axis length of the rotary disc 42, and the relative distance between the two lugs 44 is smaller than the major axis length of the rotary disc 42. The ratio of the lengths of the long axis and the short axis of the turntable 42 is 1.01-1.04, and in the embodiment, the ratio of the lengths of the long axis and the short axis of the turntable 42 is 1.02. When the rotary disc 42 abuts against the top of the housing 2 in use, the rotary disc 42 is rotated until the long axis end of the rotary disc 42 abuts against the projection 44 and is in interference fit with the projection 44, and the projection 44 and the rotary disc 42 generate a large friction force to fix the rotary disc 42 on the top of the housing 2.

Referring to fig. 4, the spring 43 is sleeved on the upper pull rod 41, and two ends of the spring 43 are respectively welded to the upper pull rod 41 and the base 1. Specifically, the upper rod 41 is a conductive rod, and the upper rod 41 is a copper rod in this embodiment. The spring 43 is a conductive spring 43, the spring 43 is electrically connected to the upper pull rod 41, the pin 5 of the base 1, which is not connected to the capacitor 3, is electrically connected to one end of the base 1 where the spring 43 is welded, and the upper end of the upper pull rod 41 is used for connecting to a circuit. The surfaces of the upper pull rod 41 and the spring 43 are covered with an anti-corrosion insulating layer, and similarly, the welding points of the upper pull rod 41 and the spring 43 and the welding points of the pin 5 and the spring 43 are also covered with the anti-corrosion insulating layer to prevent the electrolyte from corroding metal materials. The section of the upper pull rod 41 between the position where the spring 43 is welded on the upper pull rod 41 and the turntable 42 is a thermistor, that is, the pin 5, the spring 43 and the upper pull rod 41 form a section of a detection circuit, and the detection circuit can detect the temperature inside the capacitor 3 and output a corresponding detection signal. In use, the detection circuit may be connected to a chip, and the chip may control the power on or off of the capacitor 3 based on a detection signal generated by the detection circuit.

Referring to fig. 2 and 3, in order to inject the electrolyte into the accommodating cavity 21 during production, the top of the housing 2 is provided with the controllable injection hole 22, the turntable 42 is provided with the dislocation hole 45, the shape of the dislocation hole 45 is matched with that of the controllable injection hole 22, in this embodiment, the dislocation hole 45 and the controllable injection hole 22 are both round holes, the distance from the axis of the dislocation hole 45 to the axis of the housing 2 is equal to the distance from the axis of the top perforation 23 to the axis of the housing 2, and the dislocation hole 45 is aligned or dislocated with the controllable injection hole 22 to open or close the controllable injection hole 22.

The implementation principle of the high-temperature-resistant electrolytic capacitor in the embodiment of the application is as follows:

during assembly, the spring 43 is sleeved on the upper pull rod 41, two ends of the spring 43 are welded to the base 1 and the upper pull rod 41 respectively, welding points are subjected to surface treatment after welding, and an anti-corrosion insulating layer is added to prevent the welding points from being corroded. The capacitor 3 is then mounted on the upper rod 41, the upper end of the upper rod 41 is passed through the top aperture 23 of the housing 2, and the housing 2 is then screwed into the annular recess 11 with the spring 43 in its natural extended condition. After the housing 2 is screwed into the annular groove 11, the upper rod 41 is pulled upward until the top surface of the upper rod 41 abuts against the housing 2, at which time the spring 43 is placed in a stretched state. When carousel 42 butt when the top of casing 2, adjustment carousel 42 rotates, and until dislocation hole 45 is relative with controllable filling hole 22, electrolyte can be injected into holding chamber 21 through controllable filling hole 22 and dislocation hole 45 this moment, and when waiting to full, rotate carousel 42 and make controllable filling hole 22 and dislocation hole 45 stagger to close controllable filling hole 22. The turntable 42 is rotated until the long axis end of the turntable 42 abuts the projection 44 and is in interference fit with the projection 44, and the projection 44 and the turntable 42 generate a large friction force, thereby fixing the turntable 42 on the top of the housing 2.

In use, a detection circuit consisting of the pin 5, the spring 43 and the upper pull rod 41 is connected to the chip, so that the chip can control the power on or off of the capacitor 3 based on a detection signal generated by the detection circuit.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.