Fuse link, fuse, and electric device

Abstract

A fuse link, a fuse, and an electric device. The fuse link comprises first fuse links and a second fuse link; at least one end of each first fuse link is configured to be connected to a fuse terminal; first narrow-diameter portions are formed on each first fuse link; two ends of the second fuse link are respectively configured to be connected to fuse terminals; second narrow-diameter portions are formed on the second fuse link; and the cross-sectional area of each first narrow-diameter portion is smaller than that of each second narrow-diameter portion. The fuse comprises a first terminal, a second terminal, and the fuse link. The electric device comprises the fuse.

Description

Fuse body, fuse and electric device

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202410848682.5, filed on June 26, 2024, and entitled "Fuse body, fuse and electric device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of circuit protection, in particular, to a fuse body, a fuse and an electric device. BACKGROUND

[0004] With the increasing demand for power system protection, a fuse is arranged in a circuit, which melts due to its own heat when an overload or short-circuit current passes through the fuse body, thereby breaking the circuit to achieve protection. Since the fuse body is arranged inside a fuse shell with a small volume, the breaking capacity of the fuse is limited. SUMMARY

[0005] The purpose of the present disclosure is to provide a fuse body, a fuse and an electric device, which can withstand high voltage while ensuring strong current resistance, and has strong breaking capacity, to at least partially solve the related technical problems.

[0006] To achieve the above purpose, the first aspect of the present disclosure provides a fuse body, comprising a first fuse body and a second fuse body, at least one end of the first fuse body is used to connect a fuse terminal, the first fuse body is formed with a first narrow diameter part;

[0007] Both ends of the second fuse body are used to connect the fuse terminals respectively, and the second fuse body is formed with a second narrow diameter part;

[0008] The cross-sectional area of the first narrow diameter part is smaller than that of the second narrow diameter part.

[0009] Optionally, both ends of the first fuse body are used to connect the fuse terminals on the same side;

[0010] Both ends of the second fuse body are used to connect the fuse terminals on both sides respectively;

[0011] The middle part of the first fuse body is connected to the second fuse body.

[0012] Optionally, the first fuse body is a plurality of first fuse bodies, and a part of the first fuse bodies are connected to the second fuse body and the fuse terminals on one side;

[0013] Another part of the first fuse element is connected to the second fuse element and another side of the fuse terminal.

[0014] Optionally, the current flow path in the fuse element comprises at least part of the first fuse element and at least part of the second fuse element.

[0015] Optionally, the middle part of the first fuse element is bent to form a first connecting part.

[0016] The middle part of the second fuse element is bent to form a second connecting part, and the first connecting part is connected to the second connecting part.

[0017] Optionally, the first connecting part and the second connecting part are welded.

[0018] Optionally, at least one of the second narrow sections is between two adjacent second connecting parts.

[0019] Optionally, the second fuse element is provided with a stress release part, and at least one of the second narrow sections is between two adjacent stress release parts.

[0020] Optionally, the number of second narrow sections is multiple, and they are arranged at intervals along the extension direction of the second fuse element.

[0021] Optionally, the first fuse element and the second fuse element are formed by stamping.

[0022] Optionally, the melting point of the first fuse element is lower than that of the second fuse element.

[0023] Optionally, the first fuse element is made of silver alloy material.

[0024] The second fuse element is made of copper material.

[0025] In a second aspect, the disclosure provides a fuse, comprising a first terminal, a second terminal and the above-mentioned fuse element.

[0026] The first terminal and the second terminal are respectively connected to opposite ends of the fuse element.

[0027] Optionally, the fuse further comprises a housing, a first baffle and a second baffle, the housing has openings at opposite ends, the first baffle is detachably connected to the opening at one end of the housing, the second baffle is detachably connected to the opening at the other end of the housing, and the housing, the first baffle and the second baffle form a containing space.

[0028] The fuse element is located inside the containing space, and the first terminal extends outward from the through hole of the first baffle away from one end of the fuse element.

[0029] The second terminal passes through the through hole of the second baffle and extends outward from one end of the fuse body.

[0030] Optionally, an arc extinguishing medium is arranged in the accommodating space.

[0031] The first baffle and / or the second baffle is formed with a sand filling hole, and a plug is detachably mounted at the sand filling hole.

[0032] The third aspect of the present disclosure further provides an electric device comprising the fuse described above.

[0033] Through the technical solution described above, i.e., the fuse body of the present disclosure, which comprises a first fuse body with a first narrow diameter part for connecting with a fuse terminal and a second fuse body with a second narrow diameter part, wherein the cross-sectional area of the first narrow diameter part is smaller than that of the second narrow diameter part, so as to ensure that the first fuse body can be fused first and the second fuse body can be fused later, thereby ensuring strong current resistance and high voltage resistance and strong breaking capacity.

[0034] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0036] FIG. 1 is a structural diagram of a fuse body according to some embodiments of the present disclosure.

[0037] FIG. 2 is a front view of the fuse body according to some embodiments of the present disclosure.

[0038] FIG. 3 is an exploded view of the fuse body according to some embodiments of the present disclosure.

[0039] FIG. 4 is a structural diagram of a first fuse body of the fuse body according to some embodiments of the present disclosure.

[0040] FIG. 5 is a structural diagram of a second fuse body of the fuse body according to some embodiments of the present disclosure.

[0041] FIG. 6 is a structural diagram of a fuse according to some embodiments of the present disclosure.

[0042] FIG. 7 is a front view of the fuse according to some embodiments of the present disclosure.

[0043] FIG. 8 is a sectional view of the fuse according to some embodiments of the present disclosure.

[0044] FIG. 9 is a structural diagram of the fuse according to some embodiments of the present disclosure, in which the shell is hidden.

[0045] Figure 10 is an exploded view of the fuse provided by some embodiments of the present disclosure. DETAILED DESCRIPTION

[0046] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0047] In the present disclosure, the orientation words such as "inner" and "outer" refer to the contour of the corresponding parts. The terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another element, and do not have sequentiality and importance. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements, unless otherwise indicated.

[0048] The purpose of the present disclosure is to provide a fuse body 100, a fuse 600 and an electrical device, which can withstand high voltage while ensuring strong current resistance, has strong breaking capacity, and can achieve good breaking capacity in a small volume, to at least partially solve the related technical problems.

[0049] To achieve the above-mentioned purpose, as shown in Figures 1 to 5, the embodiments of the present disclosure provide a fuse body 100, which can include a first fuse body 120 and a second fuse body 110, at least one end of the first fuse body 120 is used to connect the fuse terminal 200, and the first fuse body 120 is formed with a first narrow diameter part 1201; both ends of the second fuse body 110 are used to connect the fuse terminal 200, and the second fuse body 110 is formed with a second narrow diameter part 1101; the cross-sectional area of the first narrow diameter part 1201 is smaller than the cross-sectional area of the second narrow diameter part 1101.

[0050] Through the above technical solution, i.e. the fuse body 100 of the present disclosure, which includes the first fuse body 120 with the first narrow diameter part 1201 for connecting with the fuse terminal 200 and the second fuse body 110 with the second narrow diameter part 1101, wherein the cross-sectional area of the first narrow diameter part 1201 is smaller than the cross-sectional area of the second narrow diameter part 1101, to ensure that the first fuse body 120 can melt first and the second fuse body 110 can melt later, which can withstand high voltage while ensuring strong current resistance, and has strong breaking capacity after the first fuse body 120 melts and the second fuse body 110 melts.

[0051] It should be noted that the higher the current-carrying capacity of the fuse 600, the smaller the temperature rise power consumption under normal current and pulse current. The current density J = I / s, the current-carrying capacity is positively correlated with the cross-sectional area, the larger the cross-sectional area, the higher the current-carrying capacity. But with the increase of the cross-sectional area, that is, the more material of the fuse, not only leads to slower breaking speed, but also leads to more metal vapor during breaking, and the arc is difficult to extinguish, resulting in the breaking capacity of the fuse 600 is reduced, so the cross-sectional area cannot be increased indefinitely.

[0052] Therefore, in the embodiments of the present disclosure, the cross-sectional area of the first narrow diameter part 1201 is smaller than that of the second narrow diameter part 1101, so that the second narrow diameter part 1101 with larger cross-sectional area has larger current-carrying capacity, that is, the first narrow diameter part 1201 is fused first, and then the second narrow diameter part 1101 is fused, which guarantees strong breaking capacity.

[0053] The first narrow diameter part 1201 and the second narrow diameter part 1101 can be constructed in any suitable structure, and in some embodiments, a plurality of spaced through holes can be arranged along the width direction of the first fuse body 120 and the second fuse body 110 to form the first narrow diameter part 1201 and the second narrow diameter part 1101. For example, a plurality of circular holes can be arranged in the width direction of the first fuse body 120 and the second fuse body 110, the connecting lines of the plurality of circular holes can extend along the width direction and be perpendicular to the extension direction of the first fuse body 120 and the second fuse body 110, and the part between the adjacent two circular holes is used for current flow, wherein the diameter of the circular hole on the first fuse body 120 is larger than that of the circular hole on the second fuse body 110, thereby forming the first narrow diameter part 1201 on the first fuse body 120 and the second narrow diameter part 1101 on the second fuse body 110, and the cross-sectional area of the first narrow diameter part 1201 is smaller than that of the second narrow diameter part 1101, which guarantees that the first narrow diameter part 1201 is fused before the second narrow diameter part 1101.

[0054] It can be understood that the above-mentioned circular hole is exemplary, and can also be other polygonal holes, for example, rectangular holes, hexagonal holes, octagonal holes, etc.

[0055] In some embodiments, the number of the second narrow diameter part 1101 is multiple, and is arranged in the extension direction of the second fuse body 110. Through the above arrangement, the second narrow diameter part 1101 of the second fuse body 110 has multiple, and the multiple second narrow diameter parts 1101 make the voltage-withstanding capacity of the second fuse body 110 better, and can realize higher breaking capacity in small volume, without sacrificing the current-carrying capacity of the fuse body 100.

[0056] It should be noted that one end of the first fuse body 120 can be connected to the fuse terminal 200 on one side of the fuse 600, and the other end can be connected to the second fuse body 110 to realize current flow.

[0057] The first fuse body 120 and the second fuse body 110 can be arranged in any suitable manner between the two fuse terminals 200 of the fuse. As shown in FIG. 1 and FIG. 2, in some embodiments, two ends of the first fuse body 120 are used to connect the fuse terminals 200 on the same side; two ends of the second fuse body 110 are used to connect the fuse terminals 200 on the two sides respectively; and the middle part of the first fuse body 120 is connected to the second fuse body 110.

[0058] In the above embodiment, one end of the second fuse body 110 is used to connect the fuse terminal 200 (one of the first terminal 210 and the second terminal 220) at one end of the fuse 600, the other end is used to connect the fuse terminal 200 (the other of the first terminal 210 and the second terminal 220) at the other end of the fuse 600, and the first fuse body 120 is arranged between the second fuse body 110 and the fuse terminal 200 (the first terminal 210 or the second terminal 220), i.e. a part of the first fuse body 120 is arranged between the second fuse body 110 and one fuse terminal 200 (for example, the first terminal 210), and connects the fuse terminal 200 (the first terminal 210) and the second fuse body 110; another part of the first fuse body 120 is arranged between the second fuse body 110 and the other fuse terminal 200 (the second terminal 220), and connects the fuse terminal 200 (the second terminal 220) and the second fuse body 110. Two ends of the first fuse body 120 are connected to the fuse terminals 200 (the first terminal 210 or the second terminal 220) on the same side, and the middle part of the first fuse body 120 is connected to the second fuse body 110. Since the cross-sectional area of the first narrow diameter part 1201 of the first fuse body 120 is smaller than the cross-sectional area of the second narrow diameter part 1101 of the second fuse body 110, in actual use, when the current is large, the first fuse body 120 is first fused, and then the second fuse body 110 is fused.

[0059] In some embodiments, the first fuse body 120 is a plurality of first fuse bodies, a part of the first fuse bodies 120 is connected to the second fuse body 110 and the fuse terminal 200 on one side; and the other part of the first fuse bodies 120 is connected to the second fuse body 110 and the fuse terminal 200 on the other side.

[0060] As shown in FIG. 3, for example, the second fuse 110 can be one, and the first fuses 120 can be six, wherein three of the first fuses 120 are located above the second fuse 110 and between the second fuse 110 and the upper fuse terminal 200, and the three first fuses 120 are arranged side by side between the upper fuse terminal 200 and the second fuse 110; in addition, three of the first fuses 120 are located below the second fuse 110 and between the second fuse 110 and the lower fuse terminal 200, and the three first fuses 120 are arranged side by side between the lower fuse terminal 200 and the second fuse 110. It should be noted that the six first fuses 120 described above are exemplary, and there can be more first fuses 120, such as eight or ten, etc., which are not specifically limited here.

[0061] In order to realize the connection of the first fuse 120 and the second fuse 110, as shown in FIGS. 2, 4 and 5, the middle part of the first fuse 120 is bent to form a first connecting part 1202; the middle part of the second fuse 110 is bent to form a second connecting part 1103, and the first connecting part 1202 is connected with the second connecting part 1103 to realize the connection of the first fuse 120 and the second fuse 110. Since the first fuse 120 is formed with the bent first connecting part 1202, and the second fuse 110 is formed with the bent second connecting part 1103, the first fuse 120 and the second fuse 110 described above can be arranged inside the shell 300 of the fuse 600 with a smaller volume, which can guarantee stronger current resistance and withstand high voltage, while realizing better breaking capacity in a small volume, and is conducive to reducing the volume of the fuse 600.

[0062] The first connecting part 1202 and the second connecting part 1103 can be connected by welding, for example, in some embodiments, the middle part of the first fuse 120 is bent to form a first welding part; the middle part of the second fuse 110 is bent to form a second welding part, and the first welding part is welded and connected with the second welding part.

[0063] The middle part of the first fuse 120 forms the first connecting part 1202, and the middle part of the second fuse 110 forms the second connecting part 1103, which can be connected by resistance welding, i.e. spot welding. In addition, laser welding can also be selected according to the weldability of the material to realize the connection of the two. It should be noted that the second fuse 110 can be provided with a plurality of second connecting parts 1103, and the plurality of second welding parts 1103 are the same in number as the first fuses 120 and correspond one by one.

[0064] The first and second fuses 120 and 110 can be configured in any suitable shape, as shown in FIG. 4. In some embodiments, the first fuse 120 can be in a U-shaped or approximately U-shaped structure, with the open end of the U-shaped structure configured to connect with the fuse terminal 200, and the middle of the U-shaped structure forming the first connecting portion 1202 configured to connect with the second fuse 110.

[0065] As shown in FIG. 5, the second fuse 110 includes a first connecting segment 111, a second connecting segment 113, and a bent portion 112, with the two ends of the bent portion 112 connected with the first and second connecting segments 111 and 113, respectively, and the ends of the first and second connecting segments 111 and 113 away from the bent portion 112 connected with two different fuse terminals 200, respectively. The bent portion 112 includes a plurality of first connecting portions 1202 corresponding to the middle of the U-shaped structure, forming the second connecting portions 1103. It can be understood that the first and second connecting portions 1202 and 1103 can be flat, or alternatively, can be corresponding arc-shaped or curved surfaces, for facilitating welding connection.

[0066] In the first fuse 120, a first narrow portion 1201 is formed on each side of the U-shaped structure, and the two narrow portions correspond in the extension direction (vertical direction) of the first fuse 120.

[0067] As shown in FIG. 2, at least one second narrow portion 1101 is between two adjacent second connecting portions 1103. Among the plurality of second connecting portions 1103, a second narrow portion 1101 is provided between each two adjacent second connecting portions 1103, and the plurality of second narrow portions 1101 correspond in the vertical direction. In addition, two second narrow portions 1101 are also formed on the first and second connecting segments 111 and 113, with one of the second narrow portions 1101 corresponding to the second narrow portion 1101 between the two second connecting portions 1103 in the vertical direction, and the other second narrow portion 1101 corresponding to the first narrow portion 1201 on the first fuse 120. Thus, the entire fuse 100 has three rows of narrow portions in the vertical direction, i.e., an upper position including six first narrow portions 1201 of three first fuses 120 and one second narrow portion 1101 of the first connecting segment 111 of one second fuse 110; a middle position including seven second narrow portions 1101 of the second fuse 110; and a lower position including six first narrow portions 1201 of three first fuses 120 and one second narrow portion 1101 of the second connecting segment 113 of one second fuse 110.

[0068] As the second fusing body 110 is provided with a plurality of second narrow sections 1101, in order to avoid the second narrow sections 1101 from being broken due to tension, as shown in FIG. 2 and FIG. 5, in some embodiments of the present disclosure, the second fusing body 110 is provided with stress release sections 1102, and at least one second narrow section 1101 is located between two adjacent stress release sections 1102. The stress release section 1102 can be configured in any suitable structure, for example, the stress release section 1102 can be an arc-shaped structure, which is curved to one side in a direction perpendicular to the extension direction of the second fusing body 110, and one second narrow section 1101 is arranged between two stress release sections 1102, so as to relieve the pressure at the second narrow section 1101 and avoid the physical breakage of the second narrow section 1101. In addition, the stress release section 1102 can also be other curved structures, for example, a V-shaped structure, a U-shaped structure, etc., which are not limited here.

[0069] In order to improve the pressure resistance of the second fusing body 110, in some embodiments, the number of second narrow sections 1101 is plural, and the second narrow sections 1101 are arranged at intervals along the extension direction of the second fusing body 110. That is, a plurality of rows of second narrow sections 1101 can be arranged in the extension direction of the second fusing body 110, and in cooperation with the bending section 112 arranged on the second fusing body 110, the overall length of the second fusing body 110 is further improved without occupying a large space, so as to realize higher breaking capacity in a small volume, while not sacrificing the current resistance of the fuse 600.

[0070] The first fusing body 120 and the second fusing body 110 can be manufactured in any suitable manner, and optionally, the first fusing body 120 and the second fusing body 110 are manufactured by stamping. The bending shape and the structure of the first narrow section 1201 and the second narrow section 1101 are realized by punch forming. It can be understood that the first fusing body 120 and the second fusing body 110 can also be manufactured in other ways, for example, the first narrow section 1201 and the second narrow section 1101 can be formed by laser cutting.

[0071] Optionally, the melting point of the first fusing body 120 is less than the melting point of the second fusing body 110. The first fusing body 120 can be made of silver alloy material, for example, silver-copper alloy, in which the content of silver is 72%, and the content of copper is 28%. The second fusing body 110 can be made of copper material.

[0072] The fuse body 100 is composed of a first fuse 120 (low melting point metal) and a second fuse 110 (high melting point metal), and the two parts are electrically connected by spot welding or full welding. The fuse body 100 is composed of a plurality of fuse narrow sections (including a first narrow section 1201 and a second narrow section 1101), and the area of the fuse narrow section of the low melting point metal area is smaller than that of the high melting point metal area, so as to ensure that the I2T of the low melting point metal area I2T is smaller and the low melting point metal area is fused first, and the high melting point metal area is fused later.

[0073] As shown in FIGS. 6-10, the embodiments of the present disclosure provide a fuse 600, which includes a first terminal 210, a second terminal 220, and the above-mentioned fuse body 100; the first terminal 210 and the second terminal 220 are respectively connected to the opposite ends of the fuse body 100. The fuse 600 has one terminal connected to each end of the fuse body 100, i.e., the first terminal 210 and the second terminal 220, so the fuse 600 also has all the advantages of the above-mentioned fuse body 100.

[0074] As shown in FIG. 10, in some embodiments, the fuse 600 further includes a housing 300, a first baffle 410, and a second baffle 420. The housing 300 has openings 320 at opposite ends, the first baffle 410 is detachably connected to the opening 320 at one end of the housing 300, the second baffle 420 is detachably connected to the opening 320 at the other end of the housing 300, and the housing 300, the first baffle 410, and the second baffle 420 enclose a containing space 310; wherein the first baffle 410 and the second baffle 420 are connected to the openings 320 at the opposite ends of the housing 300 by four screws 500, so as to enclose the containing space 310 with the housing 300 for mounting the fuse body 100.

[0075] The fuse body 100 is located inside the containing space 310, and the first terminal 210 extends outward from one end of the fuse body 100 through the through hole of the first baffle 410; the second terminal 220 extends outward from one end of the fuse body 100 through the through hole of the second baffle 420. The first baffle 410 and the second baffle 420 are provided with openings for the first terminal 210 and the second terminal 220 to pass through, and the first terminal 210 and the second terminal 220 can also be fixedly connected to the first baffle 410 and the second baffle 420 by the screws 500, so as to fix the first terminal 210 and the second terminal 220.

[0076] In order to realize arc extinguishing when the fuse body 100 in the fuse 600 is fused, the containing space 310 is optionally provided with an arc extinguishing medium; wherein the arc extinguishing medium includes but is not limited to quartz sand, and can also be other materials that can realize the function of arc extinguishing.

[0077] In order to fill the arc-extinguishing medium into the inside of the shell 300, in some embodiments, the first baffle plate 410 and / or the second baffle plate 420 are formed with a sand filling hole 411, and a plug is detachably mounted at the sand filling hole 411. When the arc-extinguishing medium is filled into the accommodating space 310 inside the shell 300 through the sand filling hole 411, the sand filling hole 411 can be sealed by the plug to avoid leakage of the arc-extinguishing medium.

[0078] Embodiments of the present disclosure also provide an electric device comprising the fuse 600 described above, and therefore the electric device also has all the advantages of the fuse 600 described above. The electric device can be a battery pack, an energy storage cabinet, a vehicle, etc.

[0079] It should be noted that the electric device can also be a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer, etc. Embodiments of the present disclosure do not specially limit the above-mentioned electric device.

[0080] The specific working principle of the fuse body 100, the fuse 600, and the electric device of the present disclosure is as follows:

[0081] In the normal working mode, the first fuse body 120 (6 pieces) and the second fuse body 110 (1 piece) of the fuse body 100 are combined into a parallel 7-piece fuse structure, which can ensure strong current resistance. Each fuse structure contains 3 rows of series-connected fuse narrow sections (including the first narrow section 1201 and the second narrow section 1101). When a fault current passes through, the first fuse body 120 first melts at the first narrow section 1201 due to the small I2t rate, and the second fuse body 110 quickly bears a large current. Since the second fuse body 110 is 9 rows of second narrow sections 1101 in series at this time, the current density of a single row of second narrow sections 1101 is very large, so the second fuse body 110 can continue to melt at the moment after the first fuse body 120 melts. Since the number of rows is increased, it can also withstand high voltage and has strong breaking capacity, and can achieve an ultimate breaking capacity of 100KA in a small volume.

[0082] The quantity (hole row quantity) of the second narrow diameter part 1101 is increased, that is, the melting point is increased, the arc voltage is increased, the arc energy is reduced, and the arc time is shortened; the pressure of each row of the second narrow diameter part 1101 is smaller during melting, and a higher voltage can be resisted in the same space volume, and the insulation damage, arc, explosion and other phenomena are avoided; the melting point of the second narrow diameter part 1101 is more, the arc energy is dispersed, the quartz sand can be fully contacted with the arc, and the arc energy is more quickly absorbed and the arc is cooled.

[0083] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and the simple modifications all belong to the protection scope of the present disclosure.

[0084] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure will not further describe various possible combination manners.

[0085] In addition, various different embodiments of the present disclosure can also be combined in any manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed by the present disclosure.

Claims

1. A fuse body (100) characterized in that, The fuse body (100) comprises a first fuse body (120) and a second fuse body (110), at least one end of the first fuse body (120) is used for connecting a fuse terminal (200), and the first fuse body (120) is formed with a first narrow diameter part (1201); Both ends of the second fuse body (110) are used for connecting the fuse terminals (200) respectively, and the second fuse body (110) is formed with a second narrow diameter part (1101); The cross-sectional area of the first narrow diameter part (1201) is smaller than that of the second narrow diameter part (1101).

2. The fuse body (100) according to claim 1, characterized in that Both ends of the first fuse body (120) are used for connecting the fuse terminals (200) on the same side; Both ends of the second fuse body (110) are used for connecting the fuse terminals (200) on two sides respectively; The middle part of the first fuse body (120) is connected to the second fuse body (110).

3. The fuse body (100) according to claim 1 or 2, characterized in that The first fuse body (120) is in plurality, and a part of the first fuse body (120) is connected to the second fuse body (110) and the fuse terminal (200) on one side; Another part of the first fuse body (120) is connected to the second fuse body (110) and the fuse terminal (200) on the other side.

4. The fuse body (100) according to any one of claims 1 to 3, characterized in that The current flow path in the fuse body (100) comprises at least part of the first fuse body (120) and at least part of the second fuse body (110).

5. The fuse body (100) according to any one of claims 1 to 4, characterized in that The middle part of the first fuse body (120) is bent to form a first connecting part (1202); The middle part of the second fuse body (110) is bent to form a second connecting part (1103), and the first connecting part (1202) is connected to the second connecting part (1103).

6. The fuse body (100) according to claim 5, characterized in that The first connecting part (1202) and the second connecting part (1103) are welded.

7. The fuse body (100) according to claim 5 or 6, characterized in that At least one second narrow diameter part (1101) is between two adjacent second connecting parts (1103).

8. The fuse body (100) according to any one of claims 1 to 7, characterized in that The second fuse body (110) is formed with a stress release part (1102), and at least one second narrow diameter part (1101) is between two adjacent stress release parts (1102).

9. The fuse body (100) according to any one of claims 1 to 8, characterized in that The number of the second narrow diameter parts (1101) is plurality, and they are arranged at intervals along the extension direction of the second fuse body (110).

10. The fuse body (100) according to any one of claims 1 to 9, characterized in that The first fuse body (120) and the second fuse body (110) are formed by stamping.

11. The fuse body (100) according to any one of claims 1 to 10, characterized in that The melting point of the first fuse body (120) is lower than that of the second fuse body (110).

12. The fuse body (100) according to any one of claims 1 to 11, characterized in that The first fuse body (120) is made of silver alloy material; The second fuse body (110) is made of copper material.

13. A fuse (600) characterized by, The fuse body (100) comprises a first terminal (210), a second terminal (220) and the fuse body (100) of any one of claims 1-12; The first terminal (210) and the second terminal (220) are connected to opposite ends of the fuse body (100) respectively.

14. The fuse (600) according to claim 13, characterized in that The fuse (600) further comprises a housing (300), a first baffle (410) and a second baffle (420), the housing (300) has openings (320) at opposite ends, the first baffle (410) is detachably connected to the opening (320) at one end of the housing (300), and the second baffle (420) is detachably connected to the opening (320) at the other end of the housing (300), the housing (300), the first baffle (410) and the second baffle (420) form a containing space (310); The fuse body (100) is located inside the containing space (310), and the first terminal (210) is passed through the through hole of the first baffle (410) and extends outward away from one end of the fuse body (100); The second terminal (220) is passed through the through hole of the second baffle (420) and extends outward away from one end of the fuse body (100).

15. The fuse (600) according to claim 14, characterized in that An arc extinguishing medium is arranged in the containing space (310); The first baffle (410) and / or the second baffle (420) are formed with sand filling holes (411), and plugs are detachably installed at the sand filling holes (411).

16. An electrical device, comprising: The fuse according to any one of claims 13-15.

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