Fuse and electronic device

Abstract

The application provides a fuse and an electronic device, the fuse comprising a shell with a mounting chamber, a melting element and an insulating element, the insulating element being mounted in the mounting chamber, the insulating element comprising a first flexible partition and a second flexible partition arranged oppositely, the first flexible partition and the second flexible partition being oppositely attached, the melting element being mounted between the first flexible partition and the second flexible partition, and both ends of the melting element extending out of the shell; before the melting element melts, the first flexible partition and the second flexible partition abut both sides of the melting element; after the melting element melts, the first flexible partition and the second flexible partition are oppositely attached to isolate the melted melting element. By arranging the oppositely attached first flexible partition and second flexible partition, after the melting element melts, the first flexible partition and the second flexible partition return to the initial state under the restoring action of the flexible material, so as to isolate the melted melting element.

Description

Technical Field

[0001] This application relates to the field of electrical technology, and in particular to a fuse and electronic device. Background Technology

[0002] A fuse is a current protection device that breaks the circuit by melting its molten element when the current exceeds a specified value. It is widely used in high and low voltage power distribution systems and control systems as a short-circuit and overcurrent protector, and is one of the most common types of protective electrical devices.

[0003] In recent years, with the continuous development of new energy vehicles, the use of fuses in new energy vehicles has also increased. After the existing medium and high voltage fuses blow, the contacts are still connected by an electric arc due to the close distance between them, which can damage the circuit. Summary of the Invention

[0004] Based on this, the present invention provides a fuse and electrical equipment to solve the problem of electric arcs being generated and the shell being melted during the melting process of the molten part.

[0005] This invention provides a fuse, which includes a housing with a mounting chamber, a molten element, and an insulating element. The insulating element is mounted in the mounting chamber and includes a first flexible partition and a second flexible partition disposed opposite to each other. The molten element is mounted between the first flexible partition and the second flexible partition, and both ends of the molten element extend out of the housing. An energy-absorbing element is disposed in the mounting chamber. Before the molten element melts, the first flexible partition and the second flexible partition abut against the two sides of the molten element. After the molten element melts, the first flexible partition and the second flexible partition are relatively fitted together to isolate the molten element after melting.

[0006] It is understandable that by setting relatively close first and second flexible partitions, after the molten part melts, the first and second flexible partitions return to their initial state under the recovery action of the flexible material, thereby isolating the molten part after melting.

[0007] In one embodiment of the present invention, the insulating member includes a first flexible partition, a second flexible partition, and a connecting part. The connecting part is disposed between the first flexible partition and the second flexible partition and is fixedly connected to the first flexible partition and the second flexible partition. The first flexible partition and the second flexible partition are relatively fitted together under the action of the connecting part.

[0008] It is understandable that by providing a connecting part to connect the first flexible partition and the second flexible partition, the first flexible partition and the second flexible partition are relatively fitted together under the action of the connecting part, thereby enabling the molten part to be clamped.

[0009] In one embodiment of the present invention, the connecting portion is provided with a through hole, and the heat-absorbing element is injected into the mounting chamber through the through hole.

[0010] It is understandable that by providing a through hole in the middle of the connection, an energy-absorbing element can be injected from the location of the through hole toward the locations of the first flexible separator and the second flexible separator.

[0011] In one embodiment of the present invention, the first flexible partition and the second flexible partition of the insulating member are integrally disposed, and the first flexible partition and the second flexible partition abut against the opposite inner walls of the mounting chamber, so that the first flexible partition and the second flexible partition can fit together.

[0012] It is understandable that the first flexible partition and the second flexible partition are relatively fitted together under the pressure of the inner wall of the shell so as to clamp the molten part.

[0013] In one embodiment of the present invention, the separator further includes a first protective portion and a second protective portion. The first protective portion is disposed on the side of the first flexible separator that abuts against the interior of the housing, and the width of the first protective portion is greater than the width of the first flexible separator. The second protective portion is disposed on the side of the second flexible separator that abuts against the interior of the housing, and the width of the second protective portion is greater than the width of the second flexible separator.

[0014] It is understandable that by setting up the first protective part and the second protective part, the large amount of energy released by the molten part during the melting process can be isolated to protect the shell.

[0015] In one embodiment of the present invention, the number of energy-absorbing elements is set to multiple, and they fill the mounting chamber.

[0016] Understandably, filling the mounting chamber with energy-absorbing elements maximizes the absorption of heat generated when the fuse melts.

[0017] In one embodiment of the present invention, the housing includes a receiving shell and a cover. The receiving shell has an installation chamber and an installation port on one side. The molten part is installed into the chamber through the installation port. The cover is placed over the installation port to close the installation chamber and fix the molten part.

[0018] It is understandable that by opening an installation port on one side of the housing, the molten part can be installed into the installation chamber through the installation port.

[0019] In one embodiment of the present invention, the molten element includes a molten portion and a contact head, the molten portion is disposed between the contact heads, the molten portion is disposed corresponding to the mounting chamber and sandwiched between the first flexible partition and the second flexible partition, and the contact head extends out of the mounting chamber from the molten portion.

[0020] It is understandable that by setting a molten part at the corresponding position in the installation chamber and sandwiching the molten part between the first flexible partition and the second flexible partition, the first flexible partition and the second flexible partition can function as a separator after the molten part melts.

[0021] In one embodiment of the present invention, the molten element further includes a limiting portion disposed on both sides of the contact head and extending from the contact head toward both sides. The receiving shell has a limiting cavity corresponding to the limiting portion, and the limiting portion is disposed in the limiting cavity to restrict the movement of the molten element.

[0022] It is understandable that by providing a limiting part on the molten part and a limiting cavity on the receiving shell, the limiting part and the limiting cavity can cooperate with each other to restrict the movement of the molten part.

[0023] The present invention also provides an electronic device comprising a fuse as described in any of the preceding claims.

[0024] Compared with the prior art, the fuse is designed with an insulating element to prevent the molten parts from being connected by an electric arc after melting. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the fuse provided in this application;

[0027] Figure 2 for Figure 1 The cross-sectional view of the fuse shown;

[0028] Figure 3 for Figure 1 A schematic diagram of the insulating component in the fuse shown;

[0029] Figure 4 for Figure 1 A schematic diagram of the insulation component in the fuse shown from another perspective.

[0030] Reference numerals: 100, fuse; 10, housing; 11, receiving shell; 111, mounting chamber; 112, mounting port; 113, connecting port; 114, limiting cavity; 12, cover; 20, molten element; 21, molten part; 22, contact head; 221, heat dissipation hole; 222, mating hole; 23, limiting part; 30, insulating element; 31, first flexible partition; 32, second flexible partition; 33, first protective part; 34, second protective part; 35, connecting part; 351, through hole; 40, energy-absorbing element. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0036] A fuse is a current protection device that breaks the circuit by melting its molten element when the current exceeds a specified value. It is widely used in high and low voltage power distribution systems and control systems as a short-circuit and overcurrent protector, and is one of the most common types of protective electrical devices.

[0037] In recent years, with the continuous development of new energy vehicles, the use of fuses in new energy vehicles has also increased. Existing medium and high voltage fuses usually have ceramic shells to protect the fuse body in order to achieve forced arc extinguishing. However, ceramic shells are expensive to manufacture and difficult to manufacture. In order to avoid damage to other electrical components, the ceramic shells often need to be polished with high precision, and the processing time is long.

[0038] To address the aforementioned technical problems, the present invention provides an improved fuse that uses a flexible separator to isolate the molten part after separation.

[0039] Please see Figures 1 to 2 In one embodiment of the present invention, the fuse 100 includes a housing 10, an insulating element 30, and a molten element 20. The insulating element 30 covers part of the molten element 20 and is installed inside the housing 10. The housing 10 has an installation chamber 111 for protecting the molten element 20 and preventing the molten solution of the molten element 20 from damaging other devices. The insulating element 30 is used to separate the molten element 20 after it is melted and to protect the housing 10. The molten element 20 is used to conduct current, and when the current is large, the molten element 20 melts to protect the circuit.

[0040] The housing 10 includes a receiving shell 11 and a cover 12. The receiving shell 11 is generally rectangular and relatively flat. The receiving shell 11 has an installation chamber 111. The receiving shell 11 has two opposite sides with connecting openings 113, and the side connecting the two connecting openings 113 has an installation opening 112. The molten part 20 is installed into the installation chamber 111 through the installation opening 112 and extends out of the receiving shell 11 through the two connecting openings 113. The cover 12 covers the installation opening 112 so that the molten part 20 can be sealed and installed into the installation chamber 111.

[0041] With this configuration, by opening an installation chamber 111 inside the housing 11, the molten element 20 can be installed, and by opening a communication port 113 on the side of the housing 11, both ends of the molten element 20 can extend out through the communication port 113 on the side of the housing 11.

[0042] It should be noted that the housing 10 of a traditional fuse 100 is usually made of ceramic material. However, due to the high manufacturing cost and high processing precision of ceramic housings, manufacturing ceramic housings often requires a high amount of manpower and resources. In this embodiment, the housing 10 is made of special engineering plastics. The price of special engineering plastics is lower than that of ceramics, and special engineering plastics can be injection molded into the housing 10. By setting a high-precision mold, a housing 10 with high fitting precision can be obtained without additional processing of fitting dimensions, thereby improving the manufacturing efficiency of the housing 10 and reducing costs.

[0043] In this embodiment, the housing 11 is formed by joining two symmetrically arranged special engineering plastic housings 10 together, and the cover 12 can easily cover the installation port 112, making installation simple and the processing technology simple. It should be noted that in other embodiments, the housing 11 can also be integrally molded by injection molding, as long as it can form a housing 11 that can accommodate the molten part 20.

[0044] In one embodiment of the present invention, the molten element 20 includes a molten portion 21 and a contact head 22. The molten portion 21 is disposed between the contact heads 22 to prevent excessive current from passing through and to provide overload protection. The contact head 22 extends out of the communication port 113 of the housing 11 for connecting external electrical components.

[0045] Specifically, there are two contact heads 22. The contact heads 22 can extend through the communication port 113 of the housing 11. A mating hole 222 is provided in the middle of the contact head 22 for connecting external electrical components. The molten part 21 is disposed between the two contact heads 22, and the cross-sectional area of ​​the molten part 21 is much smaller than the cross-sectional area of ​​the contact head 22. A heat dissipation hole 221 is provided through the contact head 22 at the position where it is connected to the molten part 21 along the central axis, so that the molten part 21 can dissipate heat during the melting process.

[0046] With this configuration, by providing a heat dissipation hole 221 at the connection point between the contact head 22 and the molten part 21, the molten part 21 can dissipate heat through the heat dissipation hole 221 during the melting process, thereby preventing the molten temperature from being too high and burning out the surrounding electrical components.

[0047] It should be noted that the present invention does not limit the bending method of the molten part 21. In other embodiments, the molten part 21 may also be provided with multiple bends, a "Z" shape, or an "X" shape, as long as the contact heads 22 at both ends can be connected through the molten part 21. It should be understood that although the shape of the molten part 21 can be set to various shapes and styles, the shape or style should meet the actual design needs and actual application to prevent damage to other electrical components during use.

[0048] Furthermore, in order to limit the position of the molten part 20 in the mounting chamber 111, the molten part 20 also includes a limiting part 23. The limiting part 23 is disposed at one end of the contact head 22 that is relatively close to the molten part 21 and extends from the contact head 22 toward both sides. A limiting cavity 114 that cooperates with the limiting part 23 is provided at the position of the connecting openings 113 on both sides of the housing shell 11. After the molten part 20 is installed into the mounting chamber 111, the limiting part 23 can be installed into the limiting cavity 114. The limiting part 23 limits the range of motion of the molten part 20 in the mounting chamber 111 by abutting against the side wall of the limiting cavity 114 and by the abutting of the cover 12 against the limiting part 23.

[0049] It should be noted that the present invention does not limit the arrangement of the limiting part 23, as long as it can limit the range of motion of the molten part 20. In other embodiments, a limiting hole can be opened on the molten part 20, and a corresponding limiting part 23 can be provided inside the housing 10. The range of motion of the molten part 20 can be limited by the cooperation between the limiting hole and the limiting part 23.

[0050] Furthermore, in this embodiment, the contact head 22 and the molten portion 21 are made of conductive materials, including but not limited to copper, silver, zinc, aluminum, tin, and alloys or combinations thereof, and the molten portion 21 and the contact head 22 are integrally formed during the manufacturing process. However, the present invention is not limited to the connection method of the molten portion 21 and the contact head 22. In other embodiments, the contact head 22 and the molten portion 21 can also be fixedly connected by welding, as long as the contact head 22 and the molten portion 21 are fixedly connected.

[0051] During operation, current flows normally from one end of the contact 22 through the molten part 21 to the other end of the contact 22. However, when the current is overloaded, the molten part 21 may melt or vaporize under the action of high current, releasing a large amount of energy, which may burn the housing 10 made of special engineering materials and damage surrounding electrical components. Therefore, in one embodiment of the present invention, the fuse 100 also includes an energy-absorbing element 40, which is disposed in the mounting chamber 111 to absorb the energy released when the molten part 21 melts. Preferably, multiple energy-absorbing elements 40 are provided to fill the mounting chamber 111, thereby absorbing the energy released by the molten part 20 during the melting process.

[0052] It should be noted that the present invention is not limited to filling the mounting chamber 111 with the energy-absorbing element 40. In other embodiments, the energy-absorbing element 40 may be slightly less than the capacity of the mounting chamber 111, as long as the energy-absorbing element 40 can absorb the energy released by the molten element 20.

[0053] In this embodiment, the energy-absorbing element 40 is set as quartz sand, but the present invention is not limited to absorbing the energy released by the molten element 20 through quartz sand. In other embodiments, other energy-absorbing elements 40 can also absorb the energy released by the molten element 20, such as clay, dolomite, etc.

[0054] Furthermore, the present invention is not limited to the energy-absorbing element 40 filling the mounting chamber 111. In other embodiments, the energy-absorbing element 40 may be slightly smaller than the capacity of the mounting chamber 111, as long as the energy-absorbing element 40 can absorb the energy released by the molten element 20.

[0055] Further, please refer to Figures 3 to 4 To prevent the molten parts 20 from remaining connected by an electric arc after melting, the fuse 100 also includes an insulating element 30. The insulating element 30 is installed in the mounting chamber 111 and is provided corresponding to the molten part 21 to separate the molten parts 20 after melting.

[0056] Specifically, the insulating member 30 includes a first flexible partition 31 and a second flexible partition 32 disposed opposite to each other. The first flexible partition 31 and the second flexible partition 32 are separately disposed. When the first flexible partition 31 and the second flexible partition 32 are installed into the mounting chamber 111, the first flexible partition 31 and the second flexible partition 32 can respectively abut against the opposite inner walls of the mounting chamber 111, so that the first flexible partition 31 and the second flexible partition 32 can be relatively fitted together to clamp the molten part 21. Before the molten part 20 is melted, the first flexible partition 31 and the second flexible partition 32 partially clamp the two sides of the molten part 20, and the remaining parts are relatively fitted together. After the molten part 20 is melted, the first flexible partition 31 and the second flexible partition 32 are fitted together under the recovery action of the flexible material to isolate the molten part 20 after melting.

[0057] With this configuration, by providing a first flexible partition 31 and a second flexible partition 32 that fit together, the first flexible partition 31 and the second flexible partition 32 can isolate the melted melted part 20 after it melts.

[0058] Furthermore, in order to isolate the heat generated by the molten component 20 during the melting process and to protect the housing 10, the insulating component 30 also includes a first protective part 33 and a second protective part 34. The first protective part 33 is disposed on the side of the first flexible partition 31 that abuts against the inside of the mounting chamber 111, and the width of the first protective part 33 is greater than the width of the first flexible partition 31. The second protective part 34 is disposed on the side of the second flexible partition 32 that abuts against the inside of the mounting chamber 111, and the width of the second protective part 34 is greater than the width of the second flexible partition 32. This allows the first protective part 33 and the second protective part 34 to protect the inner wall of the mounting chamber 111 and prevent the energy released by the molten component 20 during the melting process from damaging the housing 10.

[0059] In another embodiment of the present invention, the insulating member 30 further includes a connecting portion 35, which is disposed between the first protective portion 33 and the second protective portion 34 and is fixedly connected to the first protective portion 33 and the second protective portion 34, thereby connecting the first flexible partition portion 31, the second flexible partition portion 32, the first protective portion 33 and the second protective portion 34 into a whole through the connecting portion 35. The first flexible partition portion 31 and the second flexible partition portion 32 are relatively close together under the action of the connecting portion 35, thereby clamping the molten portion 21 of the molten member 20. After the molten member 20 melts, the first flexible partition portion 31 and the second flexible partition portion 32 are close together under the recovery action of the flexible material to isolate the molten member 20 after melting.

[0060] In addition, in order to ensure that the energy-absorbing component 40 can fill the mounting chamber 111, a through hole 351 is provided in the middle of the connecting part 35, through which the energy-absorbing component 40 can enter between the first flexible partition 31 and the second flexible partition 32 through the through hole 351 to absorb the energy generated during the melting process of the molten part 21.

[0061] It should be noted that in this embodiment, the two ends of the connecting part 35 are respectively connected to the first protective part 33 and the second protective part 34, so that the first flexible partition 31 installed on the first protective part 33 and the second flexible partition 32 installed on the second protective part 34 can fit together through the action of the connecting part 35. In other embodiments, the two ends of the connecting part 35 can also be connected to the first flexible partition and the second flexible partition 32, as long as the first flexible partition and the second flexible partition 32 can fit together.

[0062] It should be noted that in this embodiment, the first flexible partition 31 and the second flexible partition 32 are made of flexible materials, such as silicone or rubber. After being pressed, the first flexible partition 31 and the second flexible partition 32 will return to their initial state under the action of the flexible material. In other embodiments, the first flexible partition 31, the second flexible partition 32, the first protective part 33, the second protective part 34 and the connecting part 35 are all made of flexible materials, as long as the first flexible partition 31 and the second flexible partition 32 can fit together under the action of the flexible material to isolate the molten part 20 after melting.

[0063] The present invention also provides an electronic device including a fuse 100 as described in any of the above claims. In the event of an overload, the electrical device having the fuse 100 only needs to replace the fuse 100, without having to replace other electrical components damaged by the large amount of energy released by the fuse 100, thereby reducing the failure rate.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A fuse, characterized in that, The fuse comprises a housing (10) with a mounting chamber (111), a melting element (20), an insulating element (30) and an energy absorbing element (40), the insulating element (30) is mounted in the mounting chamber (111), the insulating element (30) comprises a first flexible partition (31), a second flexible partition (32) and a connecting portion (35), the first flexible partition (31) and the second flexible partition (32) are oppositely arranged, the melting element (20) is mounted between the first flexible partition (31) and the second flexible partition (32), and both ends of the melting element (20) extend out of the housing (10), and the energy absorbing element (40) is filled in the mounting chamber (111); Before the melting element (20) is melted, the first flexible partition (31) and the second flexible partition (32) abut the two side surfaces of the melting element (20); After the melting element (20) is melted, the first flexible partition (31) and the second flexible partition (32) are oppositely attached to isolate the melted melting element (20); The connecting portion (35) is arranged between the first flexible partition (31) and the second flexible partition (32), and both ends of the connecting portion (35) are connected to the first flexible partition (31) and the second flexible partition (32) respectively, and the first flexible partition (31) and the second flexible partition (32) are oppositely attached under the action of the connecting portion (35); The connecting portion (35) is provided with a through hole (351), and the energy absorbing element (40) is filled into the mounting chamber (111) through the through hole (351); The first flexible partition (31) and the second flexible partition (32) are made of flexible material, and the first flexible partition (31) and the second flexible partition (32) will return to the initial state under the action of flexible material after being pressed; The insulating element (30) further comprises a first protection portion (33) and a second protection portion (34), the first protection portion (33) is arranged on the side of the first flexible partition (31) abutting the inner wall of the housing (10), and the width of the first protection portion (33) is greater than the width of the first flexible partition (31); The second protection portion (34) is arranged on the side of the second flexible partition (32) abutting the inner wall of the housing (10), and the width of the second protection portion (34) is greater than the width of the second flexible partition (32).

2. The fuse of claim 1, wherein The first flexible partition (31) and the second flexible partition (32) of the insulating element (30) are arranged separately, the first flexible partition (31) and the second flexible partition (32) abut the opposite inner walls of the mounting chamber (111) respectively, so that the first flexible partition (31) and the second flexible partition (32) can be oppositely attached.

3. The fuse of claim 1, wherein The number of the energy absorbing element (40) is multiple, and the mounting chamber (111) is filled.

4. The fuse of claim 1, wherein The shell (10) comprises a containing shell (11) and a cover (12), the containing shell (11) is provided with a mounting cavity (111), one side of the containing shell (11) is provided with a mounting opening (112), the melting element (20) is mounted to the mounting cavity (111) through the mounting opening (112), and the cover (12) covers the mounting opening (112) to close the mounting cavity (111) and can fix the melting element (20).

5. The fuse of claim 4, wherein, The melting element (20) comprises melting portions (21) and contact portions (22), the melting portions (21) are arranged between the contact portions (22), the melting portions (21) are arranged corresponding to the mounting cavity (111) and are clamped between the first flexible separation portion (31) and the second flexible separation portion (32), and the contact portions (22) extend out of the mounting cavity (111) from the melting portions (21).

6. The fuse of claim 5, wherein, The melting element (20) further comprises limiting portions (23), the limiting portions (23) are arranged on both sides of the contact portions (22) and extend from the contact portions (22) to both sides, the containing shell (11) is provided with limiting cavities (114) corresponding to the limiting portions (23), and the limiting portions (23) are arranged in the limiting cavities (114) to limit the movement of the melting element (20).

7. An electrical device, characterized by The electrical equipment comprises the fuse as claimed in any one of claims 1 to 6.

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