CN114093669B

CN114093669B - Capacitor and electronic device

Info

Publication number: CN114093669B
Application number: CN202111166890.XA
Authority: CN
Inventors: 陈华; 言伟; 许校艺; 张万红; 王润申
Original assignee: Capxon Electronic Shen Zhen Co ltd; Huawei Technologies Co Ltd
Current assignee: Capxon Electronic Shen Zhen Co ltd; Huawei Technologies Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2023-07-07
Anticipated expiration: 2041-09-30
Also published as: CN114093669A; WO2023051477A1

Abstract

The embodiment of the application provides a capacitor and electronic equipment, and the capacitor includes: the packaging shell, the core package and the first conducting electrode; the core package is arranged in the packaging shell, and a lead is arranged on the core package; the first conducting electrode comprises a first leading-out terminal, a metal shell, an elastic piece, a connecting piece and a temperature sensing body, wherein the elastic piece, the connecting piece and the temperature sensing body are sequentially arranged in the metal shell, the metal shell is connected with a lead, the first leading-out terminal is fixed in the metal shell and is in insulating connection with the metal shell, the connecting piece is movably connected with the metal shell and is communicated with the metal shell, and the temperature sensing body is used for being converted into a liquid state from a solid state when the temperature in the metal shell is higher than the melting point of the temperature sensing body. The embodiment of the application provides a capacitor and electronic equipment, which can realize explosion prevention of the capacitor by breaking current at high temperature.

Description

Capacitor and electronic device

Technical Field

The present application relates to the field of electrical components, and in particular, to a capacitor and an electronic device.

Background

The capacitor refers to a device for accommodating charges, is one of electronic elements widely used in electronic equipment, and is widely applied to the aspects of blocking direct-current alternating current, coupling, bypass, filtering, tuning loops, energy conversion, control and the like in a circuit. With the increase of the power of the electronic equipment, the more compact the arrangement of devices in the electronic equipment is, the more the problems caused by the failure of the capacitor are increased, so that the improvement of the safety coefficient of the capacitor and the improvement of the failure mode are imperative.

When the voltage and current borne by the capacitor are overlarge or the internal pressure of the capacitor is increased after the electrolyte is vaporized, the capacitor is easy to break down, so that the capacitor is subjected to high-temperature explosion. The explosion of the capacitor not only can cause self failure, but also can cause electrolyte to be sprayed out to affect devices nearby the capacitor, can cause the increase of module electric leakage, and even cause fire disaster when serious.

Disclosure of Invention

The embodiment of the application provides a capacitor and electronic equipment, which can realize explosion prevention of the capacitor by breaking current at high temperature.

In one aspect, a capacitor may include a package housing, a core pack, and a first conductive electrode; wherein the core package is arranged inside the packaging shell, and the lead is arranged on the core package; the first conducting electrode comprises a first leading-out terminal, a metal shell, an elastic piece, a connecting piece and a temperature sensing body, wherein the elastic piece, the connecting piece and the temperature sensing body are sequentially arranged in the metal shell, the metal shell is connected with a lead, the first leading-out terminal is fixed in the metal shell and is in insulating connection with the metal shell, the connecting piece is movably connected with the metal shell and is communicated with the metal shell, and the temperature sensing body is used for being converted into a liquid state from a solid state when the temperature in the metal shell is higher than the melting point of the temperature sensing body.

The embodiment of the application provides a condenser sets up a conducting electrode, can include metal casing and the elastic component of setting in metal casing, connecting piece and temperature sensing body, and under the normal operating condition, leading-out terminal passes through connecting piece and metal casing and the wire formation conductive path, and under the high temperature, the temperature sensing body fuses from the solid state to liquid, and the bullet stress of elastic component can make leading-out terminal and metal casing disconnection to cut off the electric current, can avoid electric capacity to continuously heat up the inflation, reach the purpose of protection condenser.

In one possible embodiment, the connection element comprises a conductive element and a support element, the conductive element and the metal housing being in communication, the support element being arranged between the conductive element and the temperature sensing body.

The conducting piece is used for conducting the first leading-out terminal and the metal shell, and the supporting piece is used for limiting the distance between the conducting piece and the temperature sensing body, so that the elastic piece is limited to be in a compressed state when the temperature sensing body is in a solid state, and enough space exists between the temperature sensing body and the conducting piece so as to be convenient for accommodating the melted temperature sensing body.

In one possible embodiment, the support is an elastic member.

The supporting piece is also arranged to be an elastic piece, so that the spring force can be increased, after the temperature sensing body is melted to be in a liquid state, the conducting piece can be far away from the first leading-out terminal faster and more timely, and the effectiveness of automatic power-off of the first conducting electrode as a whole can be improved.

In one possible embodiment, the connection is of unitary construction; alternatively, the support member is fixedly connected with the conductive member.

The connecting piece can be integrally formed, so that the process difficulty is reduced and the assembly efficiency is improved; the connecting piece can also adopt a split structure, so that the material and the structure are more flexible to set.

In one possible embodiment, the temperature sensing body has a melting point of 40-200 ℃.

The temperature sensing body is in a solid state when the ambient temperature is lower than the melting point, is in a liquid state when the ambient temperature is higher than the melting point, and is set to be between 40 and 200 ℃, so that the temperature sensing body can be melted into a liquid state in time after the internal temperature of the capacitor exceeds the normal working temperature, and the first conducting electrode can be switched from a conducting state into a power-off state in time.

In one possible embodiment, the constituent material of the temperature sensing body comprises paraffin, rosin or a hot melt adhesive.

The hot melting characteristics of the temperature sensing bodies can be met by various materials, the temperature sensing bodies with different materials are arranged, the capacitors which are powered off at different temperatures can be realized, and the applicability of the capacitors is improved.

In one possible embodiment, the first conductive electrode further comprises: the gasket is arranged between the temperature sensing body and the connecting piece.

The gasket mainly can be used for protecting the temperature sensing body, avoids the support piece to damage the temperature sensing body, and prolongs the service life of the temperature sensing body.

In one possible embodiment, the gasket is provided with a through hole, and the outer diameter edge of the gasket is in sliding contact with the inner surface of the metal shell.

The through hole is used for allowing the liquid temperature sensing body to penetrate, so that the gasket plays a role in protecting the temperature sensing body and does not influence melting of the temperature sensing body and spring-open of the elastic piece.

In one possible embodiment, a gap is provided between the peripheral side of the gasket and the inner wall of the metal housing.

The gap is used for allowing the liquid temperature sensing body to penetrate, so that the gasket plays a role in protecting the temperature sensing body and does not influence melting of the temperature sensing body and ejection of the elastic piece.

In one possible embodiment, the number of first conductive electrodes is one, the capacitor further comprises a second conductive electrode comprising a second lead-out terminal, the second lead-out terminal and the first lead-out terminal being connected to two leads on the core package, respectively.

For a capacitor, a first conducting electrode and a second conducting electrode are arranged at the same time, so that the function of high-temperature automatic power off can be realized, the capacitor is prevented from self-explosion, and the production cost can be reduced.

In one possible embodiment, the number of first conductive electrodes is at least two.

The two first conducting electrodes can play a role in high-temperature automatic power off, and one of the first conducting electrodes can be prevented from being failed, so that the reliability of an automatic power off function is improved.

In one possible embodiment, the package housing includes a receiving cavity and a cover plate, the cover plate is covered on an opening of the receiving cavity, the core package is disposed in the receiving cavity, the conductive electrode is disposed in the receiving cavity or the cover plate, and the lead-out terminal extends out of the cover plate.

The packaging shell of the capacitor is simple in structure, and the overall assembly difficulty of the capacitor is reduced.

In one possible embodiment, the elastic member is a spring or reed.

The reversible elastic deformation of various types of elastic pieces can be realized, and the power-off function requirement of the capacitor is met, so that the diversity and applicability of the capacitor can be improved.

In one possible embodiment, the outgoing terminal is shaped as a lead pin, a tab or a bolt.

The leading-out terminals with various shapes can realize the connection of the capacitor and an external device, thereby improving the diversity and the applicability of the capacitor.

Another aspect of the embodiments of the present application also provides an electronic device including a circuit board and a capacitor electrically connected to the circuit board.

According to the electronic equipment provided by the embodiment of the application, when the stress of the temperature or voltage environment is abnormal, the capacitor can realize open-circuit protection, so that the overall safety of the electronic equipment can be improved.

The embodiment of the application provides a condenser and electronic equipment, be connected to the lead wire of core package through setting up a conducting electrode in the condenser, the conducting electrode can include metal casing and the elastic component of setting in metal casing, connecting piece and temperature sensing body, under the normal operating condition, the leading-out terminal passes through connecting piece and metal casing and lead wire formation conductive path, under the high temperature, the temperature sensing body fuses from solid state to liquid state, the spring stress of elastic component can make leading-out terminal and metal casing disconnection to cut off the electric current, can avoid electric capacity to continuously heat up the inflation, reach the purpose of protection condenser. The capacitor that this application embodiment provided, part integrated level is high, and the open circuit protection structure that temperature sensing body, connecting piece, elastic component constitute is built-in metal casing, and not only explosion-proof effect verifies effectively, and the uniformity is better, is convenient for production automation and device miniaturization simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of a capacitor provided in the related art;

FIG. 2 is a schematic diagram of a capacitor according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram illustrating a state transition of a first conductive electrode according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of another structure of a first conductive electrode according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of another structure of a first conductive electrode according to an embodiment of the present disclosure;

fig. 6a, fig. 6b, fig. 6c, fig. 6d are schematic structural views of an elastic member according to an embodiment of the present application;

FIG. 7 is a schematic diagram illustrating a state transition of a first conductive electrode according to an embodiment of the present disclosure;

fig. 8a, 8b and 8c are schematic structural views of a lead-out terminal according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a package housing according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a package housing according to an embodiment of the present disclosure;

FIG. 11 is a schematic diagram of a packaging process of a capacitor according to an embodiment of the present application;

FIG. 12 is a schematic diagram of another packaging process of a capacitor according to an embodiment of the present disclosure;

fig. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Reference numerals illustrate:

100-packaging a shell; 11-a receiving cavity; 12-cover plate; 200-core pack; 21-lead wires; 300-a first conductive electrode; 31-a first lead-out terminal; 32-an insulator; 33-a metal housing; 34-an elastic member; 35-a connector; 351-conductive members; 352-support; 37-a gasket; 38-a temperature sensing body; 400-a second conductive electrode; 41-a second lead-out terminal; 500-an electronic device; 51-a circuit board; 52-capacitor.

Detailed Description

As one of electronic components used in a large number in electronic devices, the performance of a capacitor is critical to the reliability and safety of the electronic device. The capacitor can hold charges, the basic functions are charging and discharging, the process of charging the capacitor is called charging, the process of losing charge of the charged capacitor is called discharging, and the capacitor can evolve functions such as coupling, bypass, filtering, oscillation, phase shift, waveform conversion and the like by utilizing the two basic functions.

Fig. 1 is a schematic structural diagram of a capacitor provided in the related art. Referring to fig. 1, the capacitor may include a package case 100 and a core pack 200 disposed inside the package case 100, two leads being provided outside the core pack 200 as positive and negative poles of the core pack 200, respectively, the two leads being connected to a first lead-out terminal 31 and a second lead-out terminal 41, respectively, the first lead-out terminal 31 and the second lead-out terminal 41 protruding outside the package case 100 for connection with other devices.

Under the high-temperature environment, the dielectric layer voltage resistance of the capacitor is reduced, and the breakdown of local weak points occurs due to insufficient self voltage resistance or the superposition of high-voltage environment. In addition, the high temperature and high pressure also cause the capacitor to generate heat, resulting in a sharp increase in internal pressure. For a capacitor with electrolyte arranged in an aluminum capacitor and the like, if the capacitor is broken, the electrolyte is not well buffered or reduced, so that nearby devices are influenced by the ejection of the electrolyte, the module leakage is increased, and even a fire disaster is caused when the module leakage is serious. For a capacitor with a metal foil as an electrode in a thin film capacitor and the like, the excessive temperature in the capacitor can cause dissolution of materials such as the electrode and the like, so that the internal structure of the capacitor is damaged, the capacitor can explode, and the safety of peripheral devices of the capacitor is influenced.

In a related art, the capacitor may realize a self-fusing function using a fuse strip, which may be connected between the lead wire and the lead-out terminal of the core pack 200, and when the internal temperature of the capacitor is too high, the fuse strip may be broken by being heated to disconnect the lead-out terminal and the lead wire, thereby protecting the capacitor from burst. However, the fusing strip has surface tension in the high-temperature melting process, and the fusing is not easy to realize only by the gravity of the fusing strip; in addition, the material of the fusing strip is generally low-temperature alloy, and reacts with electrolyte in the capacitor to influence the reliability of the device.

In another related technology, the capacitor can be opened by using the expansion of the expansion sleeve, the lead side of the core bag is provided with a hollow electrode column structure, the electrode column is internally provided with a conductive sleeve and the expansion sleeve, the lead-out terminal is positioned in the electrode column, the length of the upper part of the lead-out terminal is externally provided with an insulating layer, under the normal working state, the lead-out terminal, the conductive sleeve and the electrode column are conducted, when the temperature inside the capacitor is too high, the expansion sleeve can generate thermal expansion, so that the conductive sleeve is pushed to move to the insulating layer, the lead-out terminal and the electrode column are disconnected, and the capacitor is automatically powered off, so that the continuous temperature rise of the capacitor is avoided. However, the electrode column structure having a complicated structure is provided on the lead side of the core package, and the manufacturing difficulty and the manufacturing cost are high.

Based on the above-mentioned problem, this application embodiment provides a condenser, sets up a conducting electrode, can include metal casing and the elastic component that sets up in metal casing, connecting piece and temperature sensing body, under normal operating condition, extraction terminal passes through connecting piece and metal casing and lead wire formation conductive path, and under the high temperature, temperature sensing body fuses from solid state to liquid, and the spring stress of elastic component can make extraction terminal and metal casing disconnection to cut off the electric current, can avoid electric capacity to continuously heat up and expand, reach the purpose of protection condenser.

Hereinafter, the structure of the capacitor provided in the present application will be described in detail through drawings and specific embodiments.

Fig. 2 is a schematic structural diagram of a capacitor according to an embodiment of the present application, and fig. 3 is a schematic state transition diagram of a first conductive electrode according to an embodiment of the present application. Referring to fig. 2 and 3, embodiments of the present application provide a capacitor, which may include: the package case 100, the core pack 200, and the first conductive electrode 300, the core pack 200 may be disposed inside the package case 100, the lead 21 may be disposed on the core pack 200, and the lead 21 may be connected to the first conductive electrode 300.

The first conductive electrode 300 may include a first lead-out terminal 31, a metal housing 33, and an elastic member 34, a connecting member 35 and a temperature sensing body 38 sequentially disposed in the metal housing 33, where the metal housing 33 may be connected with the lead 21, the first lead-out terminal 31 may be fixed in the metal housing 33 and connected with the metal housing 33 in an insulating manner, the connecting member 35 may be movably connected with the metal housing 33 and conducted, and the temperature sensing body 38 is used for converting from a solid state to a liquid state when the temperature in the metal housing 33 is higher than the melting point of the temperature sensing body 38.

One end of the first lead-out terminal 31 extends into the metal housing 33, and the other end is located outside the metal housing 33 and extends out of the package housing 100, so that the first lead-out terminal 31 can be electrically connected with other devices. The first lead-out terminal 31 may be fixedly connected in the metal housing 33 through the insulating member 32, the insulating member 32 may be embedded in the upper end surface of the metal housing 33 by means of bonding, clamping or the like, and the first lead-out terminal 31 may be inserted through the insulating member 32 and fixed in the insulating member 32 by means of bonding or the like, so that reliable fixing of the first lead-out terminal 31 may be achieved and insulation between the first lead-out terminal 31 and the metal housing 33 may be ensured.

Fig. 3 shows a state in which the first conductive electrode 300 is turned from conductive to power-off when the temperature sensing body 38 is turned from solid to liquid. When the temperature sensing body 38 is in a solid state, the connecting piece 35 is connected between the elastic piece 34 and the temperature sensing body 38, the elastic piece 34 is in a compressed state, the first leading-out terminal 31 is in contact conduction with the connecting piece 35, and the first leading-out terminal 31, the connecting piece 35, the metal shell 33 and the lead wire 21 form a conductive path; after the temperature sensing body 38 melts to become liquid at a high temperature, the liquid temperature sensing body 38 can not limit the connecting piece 35 any more, and under the elastic force of the elastic piece 34 restoring normal deformation, the connecting piece 35 moves downwards, namely moves towards a direction away from the first leading-out terminal 31, so that the first leading-out terminal 31 and the connecting piece 35 are disconnected, and disconnection is realized.

In the embodiment of the present application, the capacitor is automatically powered off at a high temperature, and the physical characteristics of the temperature sensing body 38 and the elastic member 34 are mainly utilized.

The temperature sensing body 38 is in a solid state when the ambient temperature is lower than the melting point, is in a liquid state when the ambient temperature is higher than the melting point, and the melting point of the temperature sensing body can be between 40 ℃ and 200 ℃, so that the temperature sensing body 38 can be melted into a liquid state in time after the internal temperature of the capacitor exceeds the normal working temperature, and the first conductive electrode 300 can be switched from the conductive state to the power-off state in time. The material of the temperature sensing body 38 is not particularly limited in the embodiments of the present application, and may include, for example, one or more of paraffin, rosin, hot melt adhesive, and other materials.

The elastic element 34 can be reversibly elastically deformed, when the temperature sensing body 38 is in a solid state, the limit of the connecting element 35 enables the elastic element 34 to be in a compressed state, after the temperature sensing body 38 is melted into a liquid state, part of the volume of the connecting element 35 can be immersed into the liquid state temperature sensing body 38, the connecting element 35 can move towards a direction far away from the elastic element 34, the acting force of the connecting element 35 is gradually reduced, the elastic element 34 can be gradually recovered to deform, namely the elastic element 34 is sprung out from the compressed state, and the connecting element 35 is pushed to be further far away, so that the first leading-out terminal 31 is not contacted with the connecting element 35 any more.

In addition, the connection member 35 may include a conductive member 351 and a support member 352, and the conductive member 351 and the metal case 33 are conducted such that the first lead-out terminal 31, the conductive member 351, the metal case 33, and the lead 21 constitute a conductive path when the first lead-out terminal 31 and the conductive member 351 are in contact. The supporting member 352 is disposed between the conductive member 351 and the temperature sensing member 38, the supporting member 352 is used to limit the distance between the conductive member 351 and the temperature sensing member 38, so that the solid temperature sensing member 38 and the conductive member 351 are relatively fixed, and the elastic member 34 is limited to be in a compressed state, and meanwhile, sufficient space exists between the temperature sensing member 38 and the conductive member 351 due to the existence of the supporting member 352, so as to accommodate the melted temperature sensing member 38.

The shape of the connection member 35 is not particularly limited in the embodiment of the present application, and illustratively, the conductive member 351 and the support member 352 may each be provided in a cylindrical shape, for example, a cylindrical shape, the conductive member 351 may have a diameter larger than that of the support member 352, the conductive member 351 may have a length smaller than that of the support member 352, and the peripheral side wall surface of the conductive member 351 may be in contact with the inner wall of the metal case 33 and the peripheral side wall surface of the support member 352 may have a certain distance from the inner wall of the metal case 33.

In one possible embodiment, and with reference to fig. 3, the connector 35 is of unitary construction. At this time, the conductive member 351 and the support member 352 may be made of the same material, for example, the connection member 35 may be integrally formed of a metal material such as aluminum, copper, or alloy by die casting, or the connection member 35 may be made of a non-metal conductive material such as conductive silicone, or the like, and may be integrally formed by injection molding, or the like. The conductive member 351 and the supporting member 352 may be made of different materials, for example, the conductive member 351 may be made of conductive rubber, the supporting member 352 may be made of non-conductive rubber, and both may be integrally formed by a process such as dual injection molding.

Fig. 4 is a schematic structural diagram of a first conductive electrode according to an embodiment of the present application. In another possible embodiment, as shown in fig. 4, the connection member 35 may be a separate structure, i.e., the conductive member 351 and the support member 352 may be formed separately and then connected together. At this time, the conductive member 351 may be made of a metal material such as aluminum, copper, alloy, or a non-metal conductive material, the support member 352 may be made of a conductive material or a non-conductive material, and the conductive member 351 may be fixedly connected by bonding, welding, or the like.

The support member 352 may be a rigid member that is not easily deformed by external force as shown in fig. 3 and 4, and in this case, the support member 352 only plays a structural supporting role. In another possible implementation, the support 352 may also be an elastic member.

Fig. 5 is a schematic structural diagram of a first conductive electrode according to an embodiment of the present application. Referring to fig. 5, the support member 352 may be provided as an elastic member, in which case the support member 352 may be fixed to the conductive member 351 by means of bonding, welding, or the like, or the support member 352 may be interposed between the temperature sensing body 38 and the conductive member 351, with the support member 352 and the conductive member 351 being in contact but not fixed.

When the support member 352 is provided as an elastic member, both the elastic member 34 and the support member 352 can be reversibly elastically deformed. When the temperature sensing body 38 is in a solid state, the elastic member 34 and the elastic supporting member 352 are both in a compressed state, after the temperature sensing body 38 is melted into a liquid state, a part of the volume of the supporting member 352 can be immersed into the liquid state temperature sensing body 38, and the elastic member 34 and the elastic supporting member 352 can be sprung out from the compressed state to push the conductive member 351 to move towards a direction away from the first leading-out terminal 31, so that the first leading-out terminal 31 is not contacted with the conductive member 351 any more.

It will be appreciated that the supporting member 352 is also configured as an elastic member, so that the spring force can be increased, and after the temperature sensing body 38 is melted into a liquid state, the conductive member 351 can be more quickly and timely far away from the first lead-out terminal 31, so that the effectiveness of automatic power-off of the first conductive electrode 300 as a whole can be improved.

It should be noted that, the elastic member 34 is exemplified by a spring in fig. 2-5, the supporting member 352 is exemplified by a spring in fig. 5, and the spring is only shown as an illustration, and the types of the elastic member 34 and the supporting member 352 are not limited. Fig. 6a, fig. 6b, fig. 6c, fig. 6d are schematic structural diagrams of an elastic member according to an embodiment of the present application. Referring to fig. 6 a-6 d, the elastic member 34 and the supporting member 352 may be made of various types, and the elastic member may include, but is not limited to, a spring, a metal spring, a rubber member, etc., wherein the spring may be, for example, a coil spring as shown in fig. 6a, the metal spring may be, for example, a Z-type spring as shown in fig. 6b or a "bow" type spring as shown in fig. 6c, and the rubber member may be, for example, a dome rubber as shown in fig. 6 d.

Fig. 7 is a state transition schematic diagram of a first conductive electrode according to an embodiment of the present application. Referring to fig. 7, the first conductive electrode 300 may further include: the gasket 37, the gasket 37 can be disposed between the temperature sensing body 38 and the connecting piece 35, the gasket 37 is mainly used for protecting the temperature sensing body 38, and avoiding the damage of the support piece 352 to the temperature sensing body 38, so as to prolong the service life of the temperature sensing body 38.

It should be understood that, for the temperature sensing body 38 made of the materials such as rosin, paraffin, and hot melt adhesive, the structural strength is low, the supporting member 352 is tightly abutted against the temperature sensing body 38, and the supporting member 352 made of the rigid material or the supporting member 352 made of the elastic member such as the spring may possibly generate the indentation on the temperature sensing body 38 or even fracture the temperature sensing body 38 when the pressure is applied to the temperature sensing body 38 for a long time, so that the limit effect of the solid temperature sensing body 38 on the conductive member 351 may be affected, and the electrical connection between the first lead-out terminal 31 and the lead 21 may be disabled.

The gasket 37 is interposed between the temperature sensing body 38 and the support member 352, and the area of the gasket 37 is larger than the area of the end portion of the support member 352, so that the pressure to the temperature sensing body 38 can be reduced under the same pressure to protect the temperature sensing body 38. At the same time, it should be noted that the gasket 37 should allow the liquid temperature sensing body 38 to pass through, so as to avoid affecting the spring-open of the elastic member 34 and the elastic support member 352.

In one possible embodiment, the outer diameter edge of the gasket 37 is in sliding contact with the inner surface of the metal housing 33, and the gasket 37 is provided with a through hole. At this time, the shape of the gasket 37 may be consistent with the inner cross-sectional shape of the metal housing 33, for example, may be circular, and the outer diameter of the gasket 37 is consistent with the inner diameter of the metal housing 33, which is advantageous for increasing the area of the gasket 37, facilitating smooth sliding of the gasket 37 in the metal housing 33, and the through hole is used for allowing the liquid temperature sensing body 38 to pass through.

In another possible embodiment, a gap is provided between the peripheral side of the gasket 37 and the inner wall of the metal housing 33, which gap serves to allow the liquid temperature sensing body 38 to pass through. At this time, the shape of the spacer 37 may not be particularly limited, and for example, the spacer 37 may be rectangular, elliptical, or circular.

With continued reference to fig. 7, it can be understood that the working principle of the capacitor provided in the embodiment of the present application is that, when the temperature sensing body 38 is in a solid state, the gasket 37 is sandwiched between the temperature sensing body 38 and the supporting member 352, the elastic member 34 and the supporting member 352 are in a compressed state, and the first lead-out terminal 31 is in contact conduction with the conductive member 351; when the temperature sensing body 38 is in a liquid state, the liquid temperature sensing body 38 penetrates through the through hole in the gasket 37 or the gap between the gasket 37 and the inner wall of the metal housing 33, the gasket 37 is immersed in the liquid temperature sensing body 38, and the conductive member 351 moves in a direction away from the first lead-out terminal 31 by the elastic member 34 and the supporting member 352, so that the first lead-out terminal 31 and the conductive member 351 are disconnected.

In addition, in the above embodiment of the present application, the number of the leads 21 of the core package 200 is two, the two leads 21 are respectively connected to the anode and the cathode of the core package 200, the two leads 21 are connected to the two conductive poles in one-to-one correspondence, and the two conductive poles each have a lead terminal for being used as the positive electrode and the negative electrode of the capacitor as a whole, and are connected to an external device.

In one possible embodiment, the number of first conductive electrodes 300 may be at least two. The two leads 21 can be connected with the two first conductive electrodes 300 in a one-to-one correspondence manner, and the two first conductive electrodes 300 can play a role in high-temperature automatic power off, so that one of the first conductive electrodes 300 can be prevented from being failed, and the reliability of an automatic power off function is improved.

In another possible embodiment, the number of first conductive electrodes 300 is one, the capacitor further comprises a second conductive electrode 400, the second conductive electrode 400 comprises a second lead-out terminal 41, and the second lead-out terminal 41 and the first lead-out terminal 31 are connected to two leads 21 on the core package 200, respectively. The second conductive electrode 400 may be a solid or hollow metal member, and may be directly connected to the lead wire 21 to form a conductive path, and the second conductive electrode 400 does not have the automatic power-off function of the first conductive electrode 300.

Because the second conductive electrode 400 has a simple structure and a simple manufacturing process, for one capacitor, the first conductive electrode 300 and the second conductive electrode 400 are arranged at the same time, so that the function of high-temperature automatic power off can be realized, the capacitor is prevented from self-explosion, and the production cost can be reduced.

At this time, the first conductive electrode 300 may be connected to one of the anode or the cathode of the core pack 200, and the second conductive electrode 400 may be connected to the other of the anode or the cathode. For a capacitor having a polarity, for example, an aluminum capacitance, the first lead terminal 31 may be a positive electrode or a negative electrode. For a capacitor without polarity, such as a film capacitor, the first lead terminal 31 may be any electrode.

In addition, the structures of the first lead-out terminal 31 and the second lead-out terminal 41 are not particularly limited in the embodiment of the present application, and the shapes of the two may be the same or different. The lead-out terminal may be made of an electrically conductive material of aluminum, copper, alloy or non-alloy. One end of the lead terminal is used to contact and conduct with the conductive member 351, and the number of internal contacts between the lead terminal and the conductive member 351 is not limited, and may be one or a plurality of.

The other end of the lead-out terminal is exposed outside the package case 100 for connection with an external device. Fig. 8a, fig. 8b, fig. 8c are schematic structural diagrams of a lead-out terminal according to an embodiment of the present application. Referring to fig. 8 a-8 c, the shape of the lead terminals exposed outside the package case 100 may include, but is not limited to, a lead pin type shown in fig. 8a, a bolt type shown in fig. 8b, or a tab type shown in fig. 8c, as examples.

The capacitor provided by the embodiment of the application is suitable for different types of capacitors, such as aluminum capacitors or film capacitors. The package case 100 of the capacitor is used to protect the core pack 200 and the conductive electrode inside, and the structure of the package case 100 is not particularly limited in the embodiments of the present application.

Fig. 9 is a schematic structural diagram of a package housing according to an embodiment of the present application. Referring to fig. 9, in one possible embodiment, the package housing 100 may include a receiving cavity 11 and a cover plate 12, the cover plate 12 is disposed on an opening of the receiving cavity 11, the core pack 200 is disposed in the receiving cavity 11, the first conductive electrode 300 and the second conductive electrode 400 may be disposed in the receiving cavity 11, and the first lead-out terminal 31 and the second lead-out terminal 41 provide another structural schematic diagram of the package housing. Referring to fig. 10, in another possible embodiment, the package housing 100 may include a receiving cavity 11 and a cap plate 12, the cap plate 12 is provided to cover an opening of the receiving cavity 11, the core pack 200 is provided in the receiving cavity 11, the first and second

conductive electrodes

300 and 400 may be provided in the cap plate 12, and the first and second lead-out

terminals

31 and 41 may protrude out of the cap plate 12.

The metal case 33 of the first conductive electrode 300 and the lead 21 need to be electrically connected, wherein the metal case 33 may be made of a metal material such as aluminum, copper, or an alloy, and the lead 21 may be made of a conductive material such as aluminum, copper, or an alloy, or a non-alloy. The outer surface of the metal shell 33 may be coated with a polymer or other materials, and the metal shell 33 may be fixedly connected with the lead 21 by using a pressure welding, an electronic welding, a laser welding, an ultrasonic welding, or other processing methods.

The capacitor structure provided in fig. 10 may have the following two packaging processes. Fig. 11 is a schematic diagram of a packaging process of a capacitor according to an embodiment of the present application. Referring to fig. 11, taking the first conductive electrode 300 as an example, in the first packaging process, the metal shell 33 of the first conductive electrode 300 may be fixed on the lead 21 by welding or the like, and then the core package 200 may be placed in the accommodating cavity 11, or the core package 200 may be placed in the accommodating cavity 11, and then the metal shell 22 may be fixed on the lead 21; finally, the cover plate 12 is covered on the opening side of the accommodating cavity 11, and the first lead-out terminal 31 of the first conductive electrode 300 extends out of the cover plate 12.

Fig. 12 is a schematic diagram of another packaging process of a capacitor according to an embodiment of the present application. Referring to fig. 12, in the second packaging process, the core package 200 may be first placed in the accommodating cavity 11, the metal case 33 of the first conductive electrode 300 is fixed in the cover plate 12, and then the cover plate 12 to which the first conductive electrode 300 is fixed is covered on the opening side of the accommodating cavity 11, so that the metal case 33 and the lead 21 are in contact conduction.

By combining the two packaging structures and the packaging process, the capacitor provided by the embodiment of the application is provided with the open-circuit protection structure inside the conducting electrode of the capacitor, so that the influence on the external structure and the size of the conducting electrode is small, the miniaturization of the capacitor is facilitated, the processing difficulty of the conducting electrode is low, the overall assembly difficulty of the capacitor is low, and the automatic production and the batch production of the capacitor are facilitated.

The capacitor that this application embodiment provided sets up a conducting electrode and comes to be connected to the lead wire of core package with extraction terminal, and the conducting electrode can include metal casing and the elastic component that sets up in metal casing, connecting piece and temperature sensing body, and under the normal operating condition, extraction terminal passes through connecting piece and metal casing and lead wire formation conductive path, and under the high temperature, the temperature sensing body fuses from solid state to liquid, and the spring stress of elastic component can make extraction terminal and metal casing disconnection to cut off the electric current, can avoid electric capacity to continuously heat up the inflation, reach the purpose of protection capacitor.

The capacitor that this application embodiment provided, part integrated level is high, and the open circuit protection structure that temperature sensing body, connecting piece, elastic component constitute is built-in metal casing, and not only explosion-proof effect verifies effectively, and the uniformity is better, is convenient for production automation and device miniaturization simultaneously.

Fig. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present application. Referring to fig. 13, the embodiment of the present application further provides an electronic device 500, including a circuit board 51 and the capacitor 52 provided in the embodiment of the present application and electrically connected to the circuit board 51.

The electronic device 500 with the capacitor 52 in this embodiment of the present application may include terminal devices such as a mobile phone, a tablet computer, a notebook computer, a wearable device, a virtual reality device, a vehicle-mounted device, and may also include devices in a data center such as a switch, a router, a firewall, video monitoring, video, and the like ICT (Information and Communication Technology), and devices in a data center such as a server, and power devices such as an inverter, a frequency converter, an uninterruptible power supply, and an adapter.

The capacitor 52 may perform various functions such as isolating the dc link, coupling, bypassing, filtering, tuning the loop, energy conversion, control, etc. in the circuitry of the electronic device 500. The lead-out terminals of the capacitor 52 may be soldered to the circuit board 51 to achieve reliable fixation and electrical connection with the circuit board 51. The circuit board 51 may further be provided with electronic devices such as a chip, a power module, an inductance device, a resistance device, a diode, etc., which will not be described in detail herein.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although embodiments of the present application have been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions.

Claims

1. A capacitor, comprising: the packaging shell, the core package and the first conducting electrode;

the core package is arranged inside the packaging shell, and a lead is arranged on the core package;

the first conducting electrode comprises a first leading-out terminal, a metal shell, an elastic piece, a connecting piece and a temperature sensing body, wherein the elastic piece, the connecting piece and the temperature sensing body are sequentially arranged in the metal shell, the metal shell is connected with the lead, the first leading-out terminal is fixed in the metal shell through an insulating piece and is in insulating connection with the metal shell, the connecting piece is movably connected with the metal shell and is communicated with the metal shell, the temperature sensing body is used for being converted from a solid state to a liquid state when the temperature in the metal shell is higher than the melting point of the temperature sensing body, the insulating piece is embedded into the upper end face of the metal shell, and the first leading-out terminal is fixedly arranged in the insulating piece in a penetrating way;

the connecting piece comprises a conductive piece and a supporting piece, the conductive piece is communicated with the metal shell, the supporting piece is arranged between the conductive piece and the temperature sensing body, and the peripheral side wall surface of the conductive piece is in contact with the inner wall of the metal shell;

the first conductive electrode further includes: the gasket is arranged between the temperature sensing body and the connecting piece; the gasket is provided with a through hole, and the outer diameter edge of the gasket is in sliding contact with the inner surface of the metal shell;

the metal shell and the lead are made of the same material, and the metal shell is fixedly connected with the lead.

2. The capacitor of claim 1, wherein the support member is a resilient member.

3. The capacitor of claim 1, wherein the connector is of unitary construction; or, the supporting member is fixedly connected with the conductive member.

4. A capacitor according to any one of claims 1-3, wherein the temperature sensing body has a melting point of 40-200 ℃.

5. The capacitor of claim 4, wherein the temperature sensing body comprises a paraffin wax, rosin, or hot melt adhesive.

6. A capacitor according to any one of claims 1-3, wherein the number of first conductive electrodes is one, the capacitor further comprising a second conductive electrode comprising a second outgoing terminal, the second outgoing terminal and the first outgoing terminal being connected to two of the leads on the core package, respectively.

7. A capacitor according to any one of claims 1-3, wherein the number of first conductive electrodes is at least two.

8. A capacitor according to any one of claims 1 to 3, wherein the package housing comprises a receiving cavity and a cover plate, the cover plate is arranged on an opening of the receiving cavity, the core pack is arranged in the receiving cavity, the conductive electrode is arranged in the receiving cavity or the cover plate, and the lead-out terminal extends out of the cover plate.

9. A capacitor according to any one of claims 1 to 3, wherein the resilient member is a spring or reed.

10. A capacitor according to any one of claims 1 to 3, wherein the lead-out terminal is in the shape of a lead pin, a tab or a bolt.

11. An electronic device comprising a circuit board and the capacitor of any one of claims 1-10 electrically connected to the circuit board.