A melt structure and a fuse

Abstract

This application provides a fusible element structure and a fuse, relating to the field of fuse technology. The fusible element structure has a fusible element comprising multiple fusible sections connected in series along its length, with adjacent fusible sections connected by a connecting portion. Each fusible section includes a narrow neck with a current path along the length of the fusible element. The cross-sectional area of ​​the narrow necks in the width direction of the fusible element is equal, ensuring that the heat generated at different necks is essentially consistent. Furthermore, the surface areas of at least some of the connecting portions are set to be unequal, thereby creating a difference in the rate of temperature rise in the fusible sections on either side of the connecting portions with different heat dissipation capacities. The fusible sections within the fusible element exhibit a step-by-step fusing method; therefore, not all necks within the fusible element fuse simultaneously, and the generated arc is not concentrated. This step-by-step fusing method can reduce the peak pressure within the casing during fusing, improving the reliability and stability of the fuse containing the fusible element structure.

Description

Technical Field

[0001] This application relates to the field of fuse technology, and more specifically, to a fusible element structure and a fuse. Background Technology

[0002] A fuse is a protective device that breaks the circuit by melting the fusible element inside the fuse when the current exceeds a specified value, due to the heat generated by the fuse itself. Fuses are widely used in high and low voltage power distribution systems, control systems, and electrical equipment.

[0003] In related technologies, such as Figure 1 As shown, the fusible element structure 1 inside the fuse is typically a rectangular sheet structure (also called a fuse element). A rectangular array of through holes 2 are formed on the fusible element structure 1, creating narrow necks 3 between adjacent through holes 2 in each column. The shapes and dimensions of the different narrow necks 3, as well as the spacing between adjacent columns of narrow necks 3, are identical. When the fusible element structure melts, ignoring time errors, it can be considered that all narrow necks 3 melt simultaneously. This leads to concentrated arc generation and generates significant energy, easily causing excessive internal pressure in the fuse, resulting in casing rupture and the unfavorable phenomenon of arc leakage. Utility Model Content

[0004] The purpose of this application is to provide a fusible structure and a fuse to address the shortcomings of the prior art.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows: One aspect of this application provides a melt structure, including a fuse element; The fuse includes: Multiple fuse sections, each fuse section including a narrow neck arranged along the length direction of the fuse body, wherein the cross-sectional area of ​​the narrow neck in the width direction of the fuse body is equal; Multiple fuses are connected in series along the length direction, and adjacent fuses are connected by connecting parts, and at least some of the connecting parts have different surface areas.

[0006] Optionally, all the connecting parts in the fuse body are divided into at least two first connecting parts and at least one second connecting part, wherein the surface area of ​​the first connecting part is smaller than the surface area of ​​the second connecting part, and the surface areas of each first connecting part are equal; All the fuse parts in the fuse body are divided into a first fuse part and a second fuse part. At least one side of the first fuse part is adjacent to the second connecting part, and neither side of the second fuse part is adjacent to the second connecting part. The number of first-fuse sections is less than the number of second-fuse sections.

[0007] Optionally, the surface areas of different second connections are not equal.

[0008] Optionally, the fusible part in the fuse body satisfies: 0.7≤N / M<1, where N is the number of the second fusible parts, M is the sum of the number of the first and second fusible parts, and both N and M are positive integers.

[0009] Optionally, the fuse portion includes multiple necks, which are arranged along the length and width directions to form a neck array; Adjacent rows of narrow necks arranged along the length direction are connected by a spacer, the surface area of ​​which is smaller than the surface area of ​​any connecting part; The surface areas of the intermediate spaces in the fuse are equal.

[0010] Optionally, the number of narrow necks in different fuse sections may be unequal.

[0011] Optionally, the number of fuse elements is at least two, and the fuse elements are arranged side by side along the width direction.

[0012] Optionally, there are multiple hollow sections between two adjacent rows of fuses, and adjacent fuse sections along the width direction are separated by hollow sections. The multiple hollow sections between two adjacent rows of fuses are connected or spaced apart in sequence.

[0013] Optionally, the melt structure further includes opposing first and second connecting ends, with each melt element having its opposite ends along its length connected to the first and second connecting ends respectively.

[0014] In another aspect of the embodiments of this application, a fuse is provided, including a conductive circuit and a fusible element structure as described above, wherein the fusible element structure is connected in the conductive circuit.

[0015] The beneficial effects of this application include: This application provides a fusible element structure and a fuse. The fusible element structure has a fusible element, and multiple fusible sections of the fusible element are connected in series along the length of the fusible element, with adjacent fusible sections physically connected by connecting parts. The current path and conduction path of the necks within each fusible section are consistent, and the cross-sectional areas of the necks in different fusible sections are equal in the width direction of the fusible element, resulting in identical resistances for different necks. This ensures that the heat generated at different necks is essentially uniform when the fusible element structure is connected to the circuit. Furthermore, at least some of the connecting parts have unequal surface areas, giving these connecting parts different heat dissipation capabilities. This causes a difference in the rate of temperature rise in the fusible sections on either side of the connecting parts with different heat dissipation capabilities, thus creating a step-by-step fusing mechanism within the fusible element structure. This prevents all necks within the fusible element from fusing simultaneously, resulting in a less concentrated arc. This step-by-step fusing mechanism reduces the peak pressure within the casing during fusing, improving the reliability and stability of the fuse containing the fusible element structure. Attached Figure Description To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a melt structure provided in related technologies; Figure 2 This is one of the structural schematic diagrams of a melt structure provided in an embodiment of this application; Figure 3 for Figure 1 The diagram shows a comparison of the arc voltage rise during melting of the melt structure provided by the related technologies and the melt structure provided in this application. Figure 4 This is a second schematic diagram of a melt structure provided in an embodiment of this application; Figure 5 for Figure 4 Cross-sectional view of AA; Figure 6 This is the third schematic diagram of a melt structure provided in the embodiments of this application; Figure 7 This is the fourth schematic diagram of a melt structure provided in the embodiments of this application; Figure 8 Fifth schematic diagram of a melt structure provided in the embodiments of this application; Figure 9 This is the sixth schematic diagram of a melt structure provided in the embodiments of this application.

[0017] Icons: 100 - fused structure; 101 - first connecting end; 102 - second connecting end; 103 - fuse; 104 - hollow part; 110 - fuse part; 1101 - first fuse part; 1102 - second fuse part; 111 - through hole; 112 - neck; 113 - spacer; 114 - connecting part; 1141 - first connecting part; 1142 - second connecting part. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In one aspect of this application, a fusible structure is provided, including a fusible body; the fusible body includes: a plurality of fusible portions, each fusible portion including a narrow neck disposed along the length direction of the fusible body for a current path, the cross-sectional areas of the narrow necks in the width direction of the fusible body being equal; the plurality of fusible portions are connected in series along the length direction, adjacent fusible portions are connected by a connecting portion, and at least some of the connecting portions have unequal surface areas.

[0020] The fusible structure has a fuse element, with multiple fuse elements connected in series along the length of the fuse element. Adjacent fuse elements are physically connected by connecting parts, creating a conductive path extending along the length of the fuse element. The current path of the neck within each fuse element coincides with the conductive path, and the cross-sectional area of ​​the necks in different fuse elements is equal along the width of the fuse element, resulting in identical resistance across the necks. This ensures that the heat generated at different necks is relatively uniform when the fusible structure is connected to a circuit. Furthermore, at least some connecting parts have unequal surface areas, giving them different heat dissipation capabilities. This leads to differences in the rate of temperature rise in the fuse elements on either side of the connecting parts with different heat dissipation capabilities. For example, the necks in the fuse elements on either side of the connecting parts with smaller surface areas experience a faster temperature rise and fuse earlier, while the necks in the fuse elements on either side of the connecting parts with larger surface areas experience a slower temperature rise and fuse later. This constructs a step-by-step fusing mechanism within the fuse body, ensuring that all the narrow necks within the fuse body do not fuse simultaneously. Consequently, the generated arc is not concentrated. This step-by-step fusing method can reduce the peak pressure within the casing during fusing, thereby improving the reliability and stability of the fuse containing the fusible element structure.

[0021] Figure 2 This is one of the structural schematic diagrams of a melt structure provided in the embodiments of this application. Figure 3 for Figure 1 The diagram shows a comparison of the arc voltage rise during melting of the melt structure provided by the related technologies and the melt structure provided in this application.

[0022] The melt structure 100 includes an unlimited number of fuse elements 103. For ease of understanding, Figure 2 , 4 Figures 6 and 7 show the melt structure 100 when the number of fuse elements 103 is one, while... Figure 8 and Figure 9 The melt structure 100 is shown when the number of fuse elements 103 is three.

[0023] The fuse 103 includes a fuse portion 110 and a connecting portion 114. The number of fuse portions 110 can be three or more. Since adjacent fuse portions 110 need to be physically connected through the connecting portion 114, and connecting portions 114 with different heat dissipation capabilities need to be constructed, the number of connecting portions 114 is usually two or more. The relationship between the number of fuse portions 110 and the number of connecting portions 114 usually satisfies the following: the number of connecting portions 114 plus one equals the number of fuse portions 110.

[0024] When the fusible link structure 100 is connected to a conductive circuit, each fusible link 103 serves as a conductive path connected to the circuit. Of course, when there are two or more fusible links 103, different conductive paths can be connected in parallel, partially in series, or partially in parallel. Therefore, when the length direction of the fusible link 103 is used as the conductive path, it is convenient to arrange more fusible links 110 on the conductive path, so that when the fusible link 103 is broken, there are enough fusible links 110 to raise the arc voltage to the target value, that is, greater than the power supply voltage in the conductive circuit, so as to ensure the reliable breaking of the fusible link 103.

[0025] As can be seen from the above, the melting of the fusible structure 100 is achieved by the melting of the fusible body 103, the melting of the fusible body 103 is achieved by the melting of the melting portion 110, and the melting of the melting portion 110 is achieved by the melting of the narrow neck 112. When achieving the stepwise melting of the melting portion 110 within the fusible body 103, the rate of temperature rise within at least some of the melting portions 110 can be differentiated, causing each narrow neck 112 in the fusible body 103 to melt in batches. Specifically, by differentiating the heat dissipation capabilities of the connecting portions 114 between the fusible portions 110, for example by setting the surface areas of at least some of the connecting portions 114 to be unequal, the connecting portions 114 with different surface areas have different heat dissipation surfaces, that is, forming differentiated heat dissipation capabilities (or can also be described as different heat conduction capabilities). For example, when both sides of the fusible portion 110 are connecting portions 114 with smaller surface areas, the temperature at the narrow neck 112 inside the fusible portion 110 rises faster and melts earlier; when both sides of the fusible portion 110 are connecting portions 114 with larger surface areas, the temperature at the narrow neck 112 inside the fusible portion 110 rises slower and melts later; and when the two sides of the fusible portion 110 are connecting portions 114 with larger and smaller surface areas respectively, the temperature rise rate at the narrow neck 112 inside the fusible portion 110 is between the two, and the melting time point is also between the two. This constructs a step-by-step fusing method for the fusing part 110 within the fuse body 103, so that all the necks 112 within the fuse body 103 do not fuse simultaneously, and the resulting arc is not concentrated. This step-by-step fusing method can reduce the peak pressure inside the casing during fusing, and improve the reliability and stability of the fuse in which the fuse structure 100 is located.

[0026] Please refer to the reference. Figure 2 and Figure 4 The fuse portion 110 has at least one narrow neck 112, which is mainly formed by forming a through hole 111 in the fuse body 103 (this application does not limit the shape of the through hole 111, for example it can be...). Figure 2 or Figure 4 The rectangular hole can also be a circular hole, an oval hole, etc., for example... Figure 4 In each row of through holes 111 arranged along the width direction b of the fuse 103, the solid portion between two adjacent through holes 111 serves as a neck 112; of course, the solid portion between the two through holes 111 at both ends of each row and the edge of the fuse 103 can also serve as a neck 112. It should be understood that the neck 112 is also referred to in the art as a "neck" or "reduction neck," which have the same meaning. Figure 4 In the process, the narrow neck 112 extends along the length direction a of the fuse 103. Therefore, the current path corresponding to the narrow neck 112 should also be along the length direction a of the fuse 103, so that the current path at the narrow neck 112 is the same as the conductive path of the fuse 103.

[0027] In some possible implementations, to reduce design complexity, the cross-sectional area of ​​all the necks 112 within the fuse 103 in the width direction b of the fuse 103 can be made equal. This ensures that all the necks 112 within the fuse 103 have consistent resistance, and thus consistent fusing critical temperature (the temperature at which the neck 112 melts). Therefore, the desired step-by-step fusing can be achieved simply by adjusting the heat dissipation area of ​​the connection portion 114. For example... Figure 5 In, it is shown Figure 4 The cross-section AA of the middle narrow neck 112 in the width direction b of the fuse body 103 is shown, wherein 7 narrow necks 112 are shown, and the cross-sectional area of ​​the 7 narrow necks 112 is ( Figure 5 The shaded areas in the diagram are all equal, ensuring that the seven necks 112 have the same overcurrent area, thus achieving consistent resistance. When the fuse 103 is a sheet structure of uniform thickness, the cross-sectional areas of all necks 112 within the fuse 103 are equal in the width direction b. This can be understood as the dimensions W of all necks 112 within the fuse 103 being equal in the width direction b and equal in the length direction a.

[0028] In some possible implementations, the surface area of ​​the connecting portion 114 is the same as the surface area of ​​the solid portion between adjacent fuse portions 110. For example... Figure 2As shown, when the dimension and thickness of the fuse 103 are equal everywhere along the width direction b, the factor affecting the surface area of ​​the connecting part 114 is the dimension of the connecting part 114 along the length direction a (also called the length L of the connecting part 114). Figure 2 The diagram shows four fuse parts 110 and three connecting parts 114, from... Figure 2 From left to right, the length L of the first connecting part 114 is less than the length L of the second connecting part 114, which is less than the length L of the third connecting part 114. Therefore, the four fuse parts 110 will gradually fuse. (Refer to reference...) Figure 3 , Figure 1 In the related technologies shown, all the narrow necks 112 melt simultaneously, and the arc voltage (the melting of the narrow necks 112 will establish an arc voltage) rises rapidly to the peak value in a straight line during the establishment process. However, in this application, since the four melting parts 110 melt gradually, the arc voltage rises rapidly in a straight line in the early stage, and the rise slows down in the later stage.

[0029] As previously mentioned, during the melting process of fuse 103, the arc voltage establishment process is divided into an early stage and a late stage. The arc voltage established at the end of the early stage can be called the early arc voltage, and the arc voltage established at the end of the late stage can be called the late arc voltage. To ensure that the arc voltage required for arc extinguishing is provided during circuit faults, while mitigating the adverse effects caused by arc concentration, the early arc voltage (greater than the voltage of the connected power supply) can be established in a shorter time, while the establishment process of the late arc voltage is slowed down. Specifically: In some possible implementations, all connecting portions 114 in the same fuse body 103 are divided into first connecting portions 1141 and second connecting portions 1142, wherein there are at least two first connecting portions 1141 and at least one second connecting portion 1142, and the surface area of ​​the first connecting portions 1141 is smaller than the surface area of ​​the second connecting portions 1142, and the surface areas of each first connecting portion 1141 are equal. Based on this, all fusing portions 110 in the fuse body 103 are divided into first fusing portions 1101 and second fusing portions 1102, wherein the first fusing portion 1101 is a fusing portion 110 that is adjacent to the second connecting portion 1142 on at least one side, and the second fusing portion 1102 is a fusing portion 110 that is not adjacent to the second connecting portion 1142 on either side. Therefore, it can be seen that the temperature rise trend of the narrow neck 112 in the second fusing section 1102 is faster than that of the narrow neck 112 in the first fusing section 1101. Since the number of first fusing sections 1101 is less than the number of second fusing sections 1102, all the narrow necks 112 in the second fusing sections 1102 can melt simultaneously. The melting time of the narrow necks 112 in the first fusing section 1101 is later than that of the narrow necks 112 in the second fusing section 1102. In this way, the large number of second fusing sections 1102 can be used to establish the early arc voltage that meets the arc extinguishing requirements in a short time, and the first fusing sections 1101 can be used to establish the later arc voltage in a longer time.

[0030] In some possible implementations, the fuse element 103 has a fuse section 110 that satisfies the condition: 0.7 ≤ N / M < 1, for example, N / M = 0.7, 0.8, or 0.9, where N is the number of second fuse sections 1102, and M is the sum of the number of first fuse sections 1101 and second fuse sections 1102, with both N and M being positive integers. This ensures that the initial arc voltage established by the second fuse section 1102 is greater than the voltage of the connected power supply, thus meeting the arc extinguishing requirements.

[0031] In some possible implementations, the surface areas of the different second connection portions 1142 are not equal, which allows for a further slowing down of the later arc voltage build-up process by utilizing the second connection portions 1142 with different surface areas.

[0032] In some possible implementations, the number of necks 112 included in the fuse portion 110 can be at least one. Furthermore, the number of necks 112 in different fuse portions 110 can be equal or unequal, for example... Figure 4 As shown, each fuse section 110 includes 27 narrow necks 112; for example... Figure 6 In the diagram, from left to right, the first fuse section 110 has 18 narrow necks 112, and the second and third fuse sections 110 each have 27 narrow necks 112; for example... Figure 7In the figure, from left to right, the first fuse section 110 has 16 narrow necks 112 (divided into two columns), the second fuse section 110 has 30 narrow necks 112 (divided into three columns), the third fuse section 110 has 12 narrow necks 112 (in one column), and the subsequent fuse sections 110 are not described further.

[0033] In some possible embodiments, the fuse portion 110 includes a plurality of necks 112, which are arranged along the length direction a and the width direction b to form an array of necks 112, for example... Figure 4 The diagram shows that the fuse section 110 includes 27 necks 112, which are arranged in a rectangular array of 3 columns along the length direction a and 9 columns along the width direction b (i.e., the array of necks 112 is a rectangular array at this time).

[0034] In some possible implementations, adjacent rows of narrow necks 112 arranged along the length direction are connected by a spacer 113, such as Figure 4 In this structure, the spacer 113 is a rectangular strip located between two adjacent rows of narrow necks 112 (and also between two adjacent rows of through holes 111). The surface area of ​​the spacer 113 is smaller than the surface area of ​​any one of the connecting portions 114. To ensure that the heat generated at the narrow necks 112 within different fuse portions 110 is consistent, the surface areas of the spacers 113 within the same fuse portion 110 and between different fuse portions 110 in the fuse body 103 are all equal. For example... Figure 2 As shown, when the dimension and thickness of the fuse 103 are equal everywhere along the width direction b, the factor affecting the surface area of ​​the spacer 113 is the dimension of the spacer 113 along the length direction a (also called the length D of the spacer 113). Figure 2 The diagram shows that each fuse section 110 has two spacers 113 inside. The lengths D of the spacers 113 within the same fuse section 110 are all equal, and the lengths D of the spacers 113 between different fuse sections 110 are also equal.

[0035] In some possible implementations, the dimension of the fuse element 103 along the width direction b may not be uniform everywhere, for example... Figure 7 In the figure, from left to right, the width of the fuse 103 at the location of the first fuse portion 110 is smaller than its width at the location of the second fuse portion 110, which is smaller than its width at the location of the third fuse portion 110.

[0036] In some possible implementations, the number of fuse elements 103 is at least two, and the fuse elements 103 are arranged side by side along the width direction b. For example... Figure 8 or Figure 9As shown, the melt structure 100 includes three fuse elements 103, which are arranged side by side along the width direction b, thus enabling the melt structure 100 to have more fuse elements 103 in its width direction.

[0037] In some possible implementations, adjacent fuse elements 103 arranged side by side along the width direction b can be connected in parallel or partially in parallel and partially in series. Specifically, multiple cutouts 104 can be provided between two adjacent rows of fuse elements 103, and adjacent fuse elements 110 along the width direction are separated by cutouts 104. The multiple cutouts 104 between two adjacent rows of fuse elements 103 are connected or spaced apart sequentially.

[0038] For example Figure 8 As shown in the figure, from top to bottom, three rows of fuse elements 103 and two rows of hollow sections 104 are displayed. The fuse elements 110 in the first row of fuse elements 103 and the fuse elements 110 in the second row of fuse elements 103 are separated by the first row of hollow sections 104. The fuse elements 110 in the second row of fuse elements 103 and the fuse elements 110 in the third row of fuse elements 103 are separated by the second row of hollow sections 104. Multiple hollow sections 104 in each row of hollow sections 104 are spaced sequentially, so that the fuse elements 110 in the two rows of fuse elements 103 on opposite sides of the hollow sections 104 can be connected in parallel, while the fuse elements 110 in the two rows of fuse elements 103 on opposite sides of different hollow sections 104 can be connected in series. For example... Figure 9 As shown in the figure, from top to bottom, three rows of fuse elements 103 and two rows of hollow sections 104 are displayed. The fuse elements 110 in the first row of fuse elements 103 and the fuse elements 110 in the second row of fuse elements 103 are separated by the first row of hollow sections 104. The fuse elements 110 in the second row of fuse elements 103 and the fuse elements 110 in the third row of fuse elements 103 are also separated by the second row of hollow sections 104. The two hollow sections 104 in the first row of hollow sections 104 are not connected, so the fuse elements 110 in the two rows of fuse elements 103 on opposite sides of the same hollow section 104 can be connected in parallel, while the fuse elements 110 in the two rows of fuse elements 103 on opposite sides of different hollow sections 104 can be connected in series. The two hollow sections 104 in the second row of hollow sections 104 are connected, so the fuse elements 110 in the second row of fuse elements 103 and the fuse elements 110 in the third row of fuse elements 103 are connected in parallel.

[0039] In some possible implementations, such as Figure 2 , Figure 4 , Figures 6 to 9The fusible structure 100 also includes opposing first connecting ends 101 and second connecting ends 102, with each fusible element 103 having its opposite ends along its length connected to the first connecting end 101 and the second connecting end 102, respectively. When there are at least two fusible elements 103, the same ends of the two fusible elements 103 are connected to the first connecting end 101 and the second connecting end 102, thereby forming an integral structure. The fusible structure 100 can be welded to a conductive circuit via the first connecting end 101 and the second connecting end 102.

[0040] In another aspect of this application, a fuse is provided, including a conductive circuit and a fusible element structure 100 as described above, wherein the fusible element structure 100 is connected to the conductive circuit. When the fusible element structure 100 is connected to the conductive circuit, each fuse element 103 is connected to the conductive circuit as a conductive path. Of course, when there are two or more fuse elements 103, different conductive paths can be connected in parallel, partially in series, or partially in parallel, etc. Therefore, when the length direction of the fuse element 103 is used as the conductive path, it is convenient to arrange more fuse portions 110 on the conductive path, so that when the fuse is broken, a sufficient number of fuse portions 110 can pull the arc voltage up to the target value, that is, greater than the power supply voltage in the conductive circuit, so as to ensure the reliable breaking of the fuse element 103.

[0041] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0042] As those skilled in the art will recognize, the words “including,” “comprising,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The words “or” and “and” as used herein refer to the words “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The word “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0043] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0044] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0045] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A melt structure, characterized by, Including fuse (103); The fuse (103) includes: Multiple fuse sections (110), each fuse section (110) includes a neck (112) provided along the length direction of the fuse body (103) for current paths, wherein the necks (112) in the fuse body (103) have equal cross-sectional areas in the width direction of the fuse body (103); The plurality of fuses (110) are connected in series along the length direction, and two adjacent fuses (110) are connected by a connecting part (114), and at least some of the connecting parts (114) have different surface areas.

2. The melt structure as described in claim 1, characterized in that, All connecting portions (114) in the fuse (103) are divided into a plurality of first connecting portions (1141) and second connecting portions (1142), wherein the surface area of ​​the first connecting portion (1141) is smaller than the surface area of ​​the second connecting portion (1142), and the surface areas of each first connecting portion (1141) are equal. All the fuse portions (110) in the fuse body (103) are divided into a first fuse portion (1101) and a second fuse portion (1102). At least one side of the first fuse portion (1101) is adjacent to the second connecting portion (1142), and neither side of the second fuse portion (1102) is adjacent to the second connecting portion (1142). The number of the first fuse parts (1101) is less than the number of the second fuse parts (1102).

3. The melt structure of claim 2, wherein, The surface areas of the different second connecting parts (1142) are not equal.

4. The melt structure of claim 2, wherein, The fuse element (103) has a fuse portion (110) that satisfies the following condition: 0.7 ≤ N / M < 1, where N is the number of the second fuse portion (1102), M is the sum of the number of the first fuse portion (1101) and the second fuse portion (1102), and both N and M are positive integers.

5. The melt structure of claim 1, wherein, The fuse section (110) includes a plurality of the narrow necks (112), which are arranged along the length direction and the width direction to form an array of narrow necks (112); Two adjacent rows of the narrow necks (112) arranged along the length direction are connected by a spacer (113), the surface area of ​​which is smaller than the surface area of ​​any one of the connecting parts (114); The surface areas of the spacer (113) in the fuse (103) are equal.

6. The melt structure of any one of claims 1 to 5, wherein, The number of the narrow necks (112) in the different fuse portions (110) is not equal.

7. The melt structure of any one of claims 1 to 5, wherein The number of the fuse elements (103) is at least two, and the fuse elements (103) are arranged side by side along the width direction.

8. The melt structure of claim 7, wherein, There are multiple hollow portions (104) between two adjacent rows of fuse elements (103), and the adjacent fuse elements (110) along the width direction are separated by the hollow portions (104). The multiple hollow portions (104) between two adjacent rows of fuse elements (103) are connected or spaced apart in sequence.

9. The melt structure of claim 7, wherein, The melt structure (100) further includes a first connecting end (101) and a second connecting end (102) opposite each other, and each of the fuses (103) is connected to the first connecting end (101) and the second connecting end (102) respectively at opposite ends along the length direction.

10. A fuse, characterized by It includes a conductive circuit and a melt structure (100) as described in any one of claims 1 to 9, wherein the melt structure (100) is connected in the conductive circuit.

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