阅读说明：本技术 一种抗电流冲击的电解电容 (Current impact resistant electrolytic capacitor ) 是由 李唐 张明 田红波 于 2020-12-31 设计创作，主要内容包括：本申请涉及一种抗电流冲击的电解电容,其包括壳体、安装于壳体内的电容本体、设置于壳体底部的第一引脚和第二引脚、以及设置于壳体的耐冲击机构,所述壳体内上下设置有相互连通的滑动腔和容置腔,所述电容本体安装于容置腔内且两极分别连于第一引脚和第二引脚,所述耐冲击机构包括设置于滑动腔内并隔断滑动腔两端的导电滑动件、以及设置于壳体侧面的过流熔断保护组件,所述导电滑动件在滑动腔内滑动并与壳体滑动连接,所述壳体在滑动腔的顶部处相对设置有第一触点和第二触点,所述第一触点与第一引脚电性相连,所述第二触点通过过流熔断保护组件与第二引脚电性相连。本申请具有受到电流冲击时自动断电,从而保护电容并防止电容爆炸的效果。(The application relates to an electrolytic capacitor with current impact resistance, which comprises a shell, a capacitor body arranged in the shell, a first pin and a second pin arranged at the bottom of the shell, and an impact-resistant mechanism arranged in the shell, the upper part and the lower part of the shell are provided with a sliding cavity and an accommodating cavity which are mutually communicated, the capacitor body is arranged in the accommodating cavity, two poles of the capacitor body are respectively connected with the first pin and the second pin, the impact-resistant mechanism comprises a conductive sliding part which is arranged in the sliding cavity and separates two ends of the sliding cavity, and an overcurrent fusing protection component which is arranged on the side surface of the shell, the conductive sliding part slides in the sliding cavity and is connected with the shell in a sliding way, the shell is oppositely provided with a first contact and a second contact at the top of the sliding cavity, the first contact is electrically connected with the first pin, and the second contact is electrically connected with the second pin through the overcurrent fusing protection assembly. This application has automatic power off when receiving the electric current impact to protection electric capacity prevents the effect of electric capacity explosion.)

1. An electrolytic capacitor with current impact resistance is characterized by comprising a shell (1), a capacitor body (2) arranged in the shell (1), a first pin (3) and a second pin (4) arranged at the bottom of the shell (1), and an impact-resistant mechanism (5) arranged in the shell (1), wherein a sliding cavity (11) and an accommodating cavity (12) which are communicated with each other are arranged in the shell (1) from top to bottom, the capacitor body (2) is arranged in the accommodating cavity (12), two poles of the capacitor body are respectively connected with the first pin (3) and the second pin (4), the impact-resistant mechanism (5) comprises a conductive sliding part (51) which is arranged in the sliding cavity (11) and used for isolating two ends of the sliding cavity (11), and a fusing protection component (52) which is movably arranged on the side face of the shell (1), and the conductive overcurrent sliding part (51) slides in the sliding cavity (11) and is connected with the shell (1) in a sliding manner, the shell (1) is provided with a first contact (14) and a second contact (15) at the top of the sliding cavity (11) relatively, the first contact (14) is electrically connected with the first pin (3), and the second contact (15) is electrically connected with the second pin (4) through an overcurrent fuse protection component (52).

2. The electrolytic capacitor against current impact as claimed in claim 1, wherein the inner wall of the shell (1) at the sliding cavity (11) is provided with a sliding ring groove (13), the conductive sliding member (51) comprises a metal sliding ring (511) matching with the sliding ring groove (13), and a partition sheet (512) arranged inside the metal sliding ring (511), the partition sheet (512) is fixedly connected with the metal sliding ring (511), and the partition sheet (512) is connected with the top of the shell (1) through an elastic member (53).

3. The electrolytic capacitor for resisting current impact as claimed in claim 2, wherein the outer side surface of the shell (1) is provided with a mounting hole (16) communicated with the sliding cavity (11), the overcurrent fuse protection component (52) comprises a moving part (521) arranged in the mounting hole (16) and a plurality of fuse tubes (522) arranged in the moving part (521) along the axial direction of the mounting hole (16), the moving piece (521) cuts off two ends of the mounting hole (16) and is movably connected with the moving hole, the wall of the mounting hole (16) is provided with an upper contact (161) and a lower contact (162) oppositely, a conducting position (163) is arranged between the upper contact (161) and the lower contact (162) in the mounting hole (16), the moving track of the fuse tube (522) in the mounting hole (16) passes through the conducting position (163), the fuse tube (522) electrically connects the upper contact (161) and the lower contact (162) when in the conducting position (163).

4. The electrolytic capacitor against current impact as claimed in claim 3, wherein said mounting hole (16) is a threaded circular hole, said moving member (521) is a threaded cylindrical column, said mounting hole (16) is in threaded connection with said moving member (521), and said fuse tubes (522) are arranged along the radial direction of said threaded cylindrical column and are axially arranged at equal intervals.

5. The electrolytic capacitor for current surge resistance according to claim 4, wherein a plurality of color rings are arranged on the side wall of the moving member (521), the color rings correspond to the fuse tubes (522) one by one, and the distance between the fuse tubes (522) and the conducting position (163) is equal to the distance between the color ring corresponding to the fuse tube (522) and the outer side surface of the housing (1).

6. Current surge resistant electrolytic capacitor according to claim 4, characterized in that the end of the moving element (521) remote from the sliding chamber (11) is provided with a straight slot (5211).

7. Current surge resistant electrolytic capacitor according to claim 6, characterized in that the housing (1) is cylindrical and the opening direction of the linear groove (5211) is in the same direction as the axis of the housing (1) when the fuse tube (522) is in the conducting position (163).

8. Current surge resistant electrolytic capacitor according to claim 2, characterized in that the bottom surface of the metallic slip ring (511) is provided with a corrosion protection layer.

9. Current surge resistant electrolytic capacitor according to claim 2, characterized in that the resilient member (53) is a spring.

Technical Field

The application relates to the field of electronic elements, in particular to an electrolytic capacitor resistant to current impact.

Background

A roll-to-roll capacitor is one of electronic elements widely used in electronic equipment, and has various types such as an aluminum electrolytic capacitor whose negative electrode is composed of a thin paper/film or an electrolytic polymer soaked with an electrolyte liquid (liquid electrolyte); when a forward voltage is applied, the anode is oxidized; but the compact oxide layer of the aluminum foil can protect the anode and can be quickly oxidized and repaired when the oxide layer is damaged, so that the forward leakage current of the electrolytic capacitor is very small, and the service life is very long.

The aluminum electrolytic capacitor is internally provided with electrolyte, when the electrolyte is heated or is impacted by surge current or voltage, an oxide film on an anode aluminum foil of the electrolytic capacitor is damaged, at the moment, aluminum in the aluminum foil is directly exposed in the electrolyte, and the electrolyte contains water, so that the water in the electrolyte and the anode aluminum foil can react to generate aluminum oxide and hydrogen to repair at the damaged part of the anode oxide film, and a new oxide layer is generated to realize self-healing. However, when the aluminum electrolytic capacitor is continuously heated or is subjected to current impact, the electrolyte expands rapidly, and the capacitor bulges when the electrolyte expands to a certain extent, and if the temperature of the electrolytic capacitor rises too fast, the capacitor can explode slurry and even explode, which causes danger.

Disclosure of Invention

In order to avoid explosion of the bulge of the electrolytic capacitor caused by current surge, the application provides the electrolytic capacitor resisting the current surge.

The application provides an electrolytic capacitor of anti current rush adopts following technical scheme:

an electrolytic capacitor with current impact resistance comprises a shell, a capacitor body arranged in the shell, a first pin and a second pin arranged at the bottom of the shell, and an impact-resistant mechanism arranged in the shell, the upper part and the lower part of the shell are provided with a sliding cavity and an accommodating cavity which are mutually communicated, the capacitor body is arranged in the accommodating cavity, two poles of the capacitor body are respectively connected with the first pin and the second pin, the impact-resistant mechanism comprises a conductive sliding part which is arranged in the sliding cavity and separates two ends of the sliding cavity, and an overcurrent fusing protection component which is movably arranged on the side surface of the shell, the conductive sliding part slides in the sliding cavity and is connected with the shell in a sliding way, the shell is oppositely provided with a first contact and a second contact at the top of the sliding cavity, the first contact is electrically connected with the first pin, and the second contact is electrically connected with the second pin through the overcurrent fusing protection assembly.

Through adopting above-mentioned technical scheme, when the electric capacity body received heavy current and assaulted, the positive pole aluminium foil on the electric capacity body will receive destruction and produce hydrogen, and the internal pressure of holding intracavity rose this moment, promoted electrically conductive slider and removed until electrically conductive slider switches on first contact and second contact. When the first contact and the second contact are conducted, the capacitor body is short-circuited by the conductive sliding part, the overcurrent fuse protection assembly is equivalently short-circuited to a power supply, and the overcurrent fuse protection assembly is rapidly short-circuited by large current, so that the capacitor is broken, and the capacitor body is prevented from continuously generating hydrogen to be damaged or even explode.

Preferably, the inner wall of the shell at the sliding cavity is provided with a sliding ring groove, the conductive sliding part comprises a metal sliding ring matched with the sliding ring groove and a partition sheet arranged inside the metal sliding ring, the partition sheet is fixedly connected with the metal sliding ring, and the partition sheet is connected with the top of the shell through an elastic part.

By adopting the technical scheme, when the metal slip ring slides to the first contact and the second contact, the first contact and the second contact are conducted. The gap between the metal slip ring and the sliding ring groove can be sealed by adding lubricating oil seal and other modes, so that ventilation is avoided. Meanwhile, the partition sheets block two sides of the sliding cavity, and when the air pressure in the accommodating cavity is increased, the partition sheets are pushed to compress the elastic part until the metal slip ring moves to the top of the sliding cavity to be connected with the contact.

Preferably, the outer side surface of the shell is provided with a mounting hole communicated with the sliding cavity, the overcurrent fuse protection assembly comprises a moving member arranged in the mounting hole and a plurality of fuse tubes arranged in the moving member along the axial direction of the mounting hole, the moving member partitions two ends of the mounting hole and is movably connected with the moving hole, an upper contact and a lower contact are oppositely arranged on the hole wall of the mounting hole, a conduction position is arranged between the upper contact and the lower contact in the mounting hole, the moving track of the fuse tubes in the mounting hole passes through the conduction position, and the fuse tubes are electrically connected with the upper contact and the lower contact when in the conduction position.

Through adopting above-mentioned technical scheme, when using, install the fuse tube in the outside earlier on switching on the position, when the fuse tube fusing, mean that the inside certain hydrogen that has produced of casing, but because timely short circuit, the self-healing will take place for the electric capacity body, therefore the electric property of electric capacity body keeps in rated range basically. When getting rid of external interference, outwards remove the moving member for adjacent fuse tube moves into and switches on the position and switches on with upper contact and lower contact, and the electric capacity body will resume work. At the moment, the moving piece moves outwards, the gas in the shell partially enters the mounting hole, the air pressure of the accommodating cavity is reduced, and the conductive sliding piece descends, so that the first contact and the second contact are disconnected.

Preferably, the mounting hole is the screw thread round hole, the moving member is the screw thread cylinder, mounting hole and moving member threaded connection, the fuse tube is along the radial setting of screw thread cylinder and arrange along axial equidistance.

Through adopting above-mentioned technical scheme, when using, rotate the moving member along the mounting hole and can realize the removal of moving member in the mounting hole, in addition, the screw thread in the mounting hole helps blocking the inside and outside gas of casing and switches on.

Preferably, a plurality of color rings are arranged on the side wall of the moving member, the color rings correspond to the fuse tubes one by one, and the distance between the fuse tubes and the conducting positions is equal to the distance between the color rings corresponding to the fuse tubes and the outer side surface of the shell.

Through adopting above-mentioned technical scheme, when the moving member outwards removed, can be according to the displacement of position control moving member of color ring, when the color ring was located the casing lateral surface, the fuse tube will move to switch on the position and link to each other with upper contact and lower contact.

Preferably, one end of the moving member, which is far away from the sliding cavity, is provided with a straight groove.

Through adopting above-mentioned technical scheme, the straight groove is favorable to people to use instruments such as screwdriver to twist the moving member.

Preferably, the housing is cylindrical, and when the fuse tube is located at the conducting position, the opening direction of the linear groove is in the same direction as the axis of the housing.

Through adopting above-mentioned technical scheme, the position indication can be carried out to the word groove, and people can finely tune the orientation of fuse tube.

Preferably, the bottom surface of the metal slip ring is provided with an anticorrosive coating.

By adopting the technical scheme, the anticorrosive coating prevents the metal slip ring from chemically reacting with the electrolyte.

Preferably, the elastic member is a spring.

Drawings

FIG. 1 is a schematic diagram of an electrolytic capacitor against current surge according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of an electrolytic capacitor resistant to current surges taken along a section through the axis of the displacement member and the axis of the housing in an embodiment of the present application;

FIG. 3 is an overall schematic view of an overcurrent fuse protection assembly in an embodiment of the present application;

FIG. 4 is an equivalent circuit diagram of an electrolytic capacitor resistant to current surge in the embodiment of the present application.

Description of reference numerals:

1. a housing; 11. a sliding cavity; 12. an accommodating cavity; 13. a sliding ring groove; 14. a first contact; 15. a second contact; 16. mounting holes; 161. an upper contact; 162. a lower contact; 163. a conducting bit; 2. a capacitor body; 3. a first pin; 4. a second pin; 5. an impact resistant mechanism; 51. a conductive slider; 511. a metallic slip ring; 512. separating the thin sheets; 52. an overcurrent fusing protection component; 521. a moving member; 5211. a straight slot; 522. a fuse tube; 53. an elastic member.

Detailed Description

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

The embodiment of the application discloses an electrolytic capacitor resistant to current surge. Referring to fig. 1 and 2, the electrolytic capacitor includes a case 1, a capacitor body 2 installed in the case 1, a first lead pin 3 and a second lead pin 4 disposed at the bottom of the case 1, and an impact resistant mechanism 5 disposed at the case 1.

Referring to fig. 2, the housing 1 is a cylindrical housing 1, and the first pin 3 and the second pin 4 are disposed at the bottom of the housing 1. The casing 1 has a cylindrical cavity therein, which is divided into a sliding chamber 11 and an accommodating chamber 12 that are communicated with each other, wherein the sliding chamber 11 is far away from the bottom of the casing 1, and the accommodating chamber 12 is close to the bottom of the casing 1. The capacitor body 2 is integrally cylindrical and is arranged in the accommodating cavity 12, the capacitor body 2 comprises two aluminum foils wound around each other, electrolytic paper positioned between the aluminum foils and electrolyte soaked on the electrolytic paper, and the electrolytic paper is used for insulating the two aluminum foils from each other.

The impact-resistant mechanism 5 comprises a conductive sliding part 51 arranged in the sliding cavity 11 and used for isolating two ends of the sliding cavity 11, and an overcurrent fuse protection component 52 movably arranged on the side surface of the shell 1. The inner wall of the housing 1 at the sliding cavity 11 is provided with a sliding ring groove 13, that is, the inner diameter of the side wall of the housing 1 at the sliding cavity 11 is larger than that at the accommodating cavity 12. The conductive sliding part 51 comprises a metal sliding ring 511 matched with the sliding ring groove 13 and a partition sheet 512 arranged inside the metal sliding ring 511, the metal sliding ring 511 slides in the sliding ring groove 13 and is connected with the sliding ring groove 13 in a sliding manner, and the bottom surface of the metal sliding ring 511 is provided with an anticorrosive layer to prevent the metal sliding ring 511 from generating chemical reaction with electrolyte. In order to improve the blocking capability of the metal slip ring 511 to the space on both sides, the metal slip ring 511 and the groove bottom of the sliding ring groove 13 may be sealed by oil seal or the like to block the gap and reduce the sliding friction force. The edge of the partition sheet 512 is fixedly connected to the metal slip ring 511, and the partition sheet 512 is connected to the top of the housing 1 through the elastic member 53, in this embodiment, the elastic member 53 is a spring.

The housing 1 is provided with a first contact 14 and a second contact 15 opposite to each other at the top of the sliding chamber 11, and when the metal slip ring 511 slides to the top of the sliding chamber 11, the metal slip ring 511 will be electrically connected with the first contact 14 and the second contact 15. The first contact 14 is electrically connected to the first pin 3 through a copper wire embedded in the housing 1, and the second contact 15 is sequentially connected to the overcurrent fuse protection component 52 and the second pin 4 through a copper wire embedded in the housing 1.

Referring to fig. 2, a mounting hole 16 communicating the sliding cavity 11 with the outside is formed in a side surface of the housing 1, and the mounting hole 16 is a threaded circular hole and has an axis perpendicular to an axis of the housing 1. Referring to fig. 2 and 3, the overcurrent fuse protection assembly 52 includes a moving member 521 disposed in the mounting hole 16 and a plurality of fuse tubes 522 mounted along the axial direction of the mounting hole 16, the moving member 521 blocks two ends of the mounting hole 16 and is movably connected with the moving hole, in this embodiment, the moving member 521 is a threaded cylinder, and the moving member 521 is in threaded connection with the mounting hole 16. The fuse tubes 522 are arranged in the radial direction of the threaded post and are arranged at equal intervals in the axial direction, and in the present embodiment, the orientation of each fuse tube 522 is the same. The wall of the mounting hole 16 is provided with an upper contact 161 and a lower contact 162 opposite to each other, a conducting position 163 is provided between the upper contact 161 and the lower contact 162 in the mounting hole 16, a moving track of the fuse tube 522 in the mounting hole 16 passes through the conducting position 163, and when the fuse tube 522 is in the conducting position 163, the upper contact 161 and the lower contact 162 are electrically connected. During the equipment, twist earlier and move moving member 521 for the fuse tube 522 that is far away from sliding chamber 11 on the moving member 521 is located and switches on position 163, and when fuse tube 522 fusing, it has produced certain hydrogen to mean that casing 1 is inside, but because in time the short circuit, self-healing will take place for electric capacity body 2, therefore electric property of electric capacity body 2 keeps in rated range basically. When the external interference is eliminated, the moving member 521 is screwed to move the moving member 521 in a direction away from the sliding chamber 11, so that the blown fuse tube 522 moves out of the conducting position 163, and the adjacent intact fuse tube 522 moves into the conducting position 163, so that the upper contact 161 and the lower contact 162 are conducted again. As the moving member 521 moves outward, the gas in the housing 1 partially enters the mounting hole 16, the air pressure in the accommodating chamber 12 is reduced, and the elastic member 53 pushes the conductive sliding member 51 to descend, so that the first contact 14 and the second contact 15 are disconnected.

In order to facilitate screwing the moving member 521, referring to fig. 3, an end of the moving member 521, which is away from the sliding cavity 11, is provided with a straight groove 5211, which is beneficial for people to use a tool such as a screwdriver to screw the moving member 521. In order to indicate the distance for screwing the moving member 521, a plurality of color rings are arranged on the side wall of the moving member 521, the number of the color rings is the same as that of the fuse tubes 522, and the color rings correspond to the fuse tubes 522 one by one. The distance between the fuse tube 522 and the conducting position 163 is equal to the distance between the color ring corresponding to the fuse tube 522 and the outer side surface of the housing 1. When the moving member 521 moves outward, the moving distance of the moving member 521 can be controlled according to the position of the color wheel, and when the color wheel is located at the outer side of the housing 1, the fuse tube 522 will move to the conducting position 163 and connect with the upper contact 161 and the lower contact 162. Further, when the fuse tube 522 is located at the conducting position 163, the opening direction of the linear groove 5211 is the same as the axial line of the housing 1. The linear slot 5211 can provide a position indication that allows one to fine tune the orientation of the fuse tube 522.

The implementation principle of the embodiment is as follows:

referring to fig. 2 and 4, the first pin 3 and the second pin 4 are connected to an external circuit, the first pin 3-the fuse tube 522-the capacitor body 2-the second pin 4 form a main circuit, the first contact 14-the metal slip ring 511-the second contact 15 are equivalent to controllable switches connected in parallel with two ends of the capacitor body 2, when the controllable switches are turned on, the capacitor body 2 is short-circuited and the current of the main circuit rapidly increases, so that the fuse tube 522 is blown off, and the main circuit is broken. Therefore, when the capacitor body 2 is subjected to a large current impact, the anode aluminum foil on the capacitor body 2 will be damaged and generate hydrogen, and at this time, the internal pressure in the accommodating cavity 12 rises to push the conductive sliding part 51 to move until the conductive sliding part 51 conducts the first contact 14 and the second contact 15, and the fuse tube 522 is blown. After current fluctuation factors of an external circuit are eliminated, in order to restore the operation of the capacitor, the moving member 521 is screwed by the linear groove 5211 to move outwards, the fused fuse tube 522 moves out of the conducting position 163, and the adjacent intact fuse tube 522 moves into the conducting position 163, so that the upper contact 161 and the lower contact 162 are conducted again, and the operation of the capacitor body 2 is restored.

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.