Melt structure with small breaking multiple

Abstract

The utility model relates to a fuse melt, in particular to a small-breaking-multiple melt structure, which comprises a melt, and connecting plates are arranged at two ends of the melt. The fuse body is provided with a small breaking fusing part, and a first fusing part and a second fusing part which are respectively positioned on two sides of the small breaking fusing part; the resistance of the small breaking fusing part is larger than that of the first fusing part and that of the second fusing part, and when the short-circuit current passes through the fuse, the small breaking fusing part accumulates heat and is fused. According to the utility model, the small breaking fusing part is arranged, so that the minimum breaking capacity is improved, and the minimum breaking time is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fuse link, concretely relates to a small breaking multiple fuse link structure. BACKGROUND

[0002] As a current protection device, the fuse plays a crucial role in the power system. Its working principle is based on the thermal effect of current. When the current in the circuit exceeds the specified value, the fuse link inside the fuse will heat up due to its own heat, and will melt when it reaches the melting point, thereby rapidly cutting off the circuit to prevent excessive current from causing damage to the circuit and equipment.

[0003] The structure of the fuse generally includes a fuse link, a housing, and a mounting portion. Among them, the fuse link is the core element that controls the fuse characteristics, and its material, size, and shape parameters directly determine the fuse current and time characteristics. The housing serves to protect and support the fuse link, ensuring that the fuse works stably in various environments.

[0004] However, in actual applications, the matching use of the fuse with electrical equipment such as relays puts higher requirements on its performance. Especially in the electric vehicle (EV) and photovoltaic (PV) industries, due to frequent and large current changes, there are strict standard requirements for the minimum breaking capacity and breaking time of the fuse. Generally speaking, the minimum breaking capacity of the fuse needs to be less than 3KA, and in the electric vehicle and photovoltaic industries, the fuse is also required to have a minimum breaking capacity of 2In and meet specific breaking time requirements.

[0005] However, the traditional fuse scheme often has deficiencies in minimum breaking time and minimum breaking multiple. The minimum breaking time of the conventional scheme is too long, making it difficult to meet the demand for rapid circuit interruption; at the same time, the minimum breaking multiple is not easy to achieve 2In, resulting in that when the current fluctuates greatly, the fuse may not be able to melt in time, thereby failing to effectively protect the safety of the circuit and equipment. SUMMARY

[0006] The utility model aims at solving the technical problem of the minimum breaking time being too long and the minimum breaking not being easy to achieve 2In in the prior art, and provides a small breaking multiple fuse link structure.

[0007] To solve the above technical problems, the technical solution provided by the utility model is as follows:

[0008] A small breaking multiple fuse link structure includes a fuse link, and a connecting plate is arranged at both ends of the fuse link.

[0009] The melt is provided with a small breaking fuse part, and a first fuse part and a second fuse part respectively located on both sides of the small breaking fuse part; the resistance of the small breaking fuse part is greater than the resistance of the first fuse part and the second fuse part, and the small breaking fuse part melts when a short circuit current passes through the melt.

[0010] Further, the first fuse part, the small breaking fuse part and the second fuse part are uniformly distributed on the melt along the length direction of the melt.

[0011] Further, the first fuse part comprises a plurality of first narrow paths; the small breaking fuse part comprises a plurality of second narrow paths; and the second fuse part comprises a plurality of third narrow paths.

[0012] The number and width of the first narrow path, the second narrow path and the third narrow path are the same.

[0013] The length of the first narrow path is the same as that of the third narrow path, and the length of the second narrow path is greater than that of the first narrow path and the third narrow path.

[0014] Further, a plurality of first circular holes, second strip holes and third circular holes are uniformly distributed on the melt along the width direction of the melt.

[0015] The width direction of the second strip hole is consistent with the width direction of the melt.

[0016] The melt between two adjacent first circular holes forms a first narrow path, the melt between two adjacent second strip holes forms a second narrow path, and the melt between two adjacent third circular holes forms a third narrow path.

[0017] Further, the length and width of the first narrow path, the second narrow path and the third narrow path are the same.

[0018] The number of the first narrow path is the same as that of the third narrow path, and the number of the second narrow path is less than that of the first narrow path and the third narrow path.

[0019] Further, a plurality of first circular holes, second strip holes and third circular holes are uniformly distributed on the melt along the width direction of the melt.

[0020] The length direction of the second strip hole is consistent with the width direction of the melt.

[0021] The melt between two adjacent first circular holes forms a first narrow path, the melt between two adjacent second strip holes forms a second narrow path, and the melt between two adjacent third circular holes forms a third narrow path.

[0022] Further, the width of the first narrow path, the second narrow path and the third narrow path is the same.

[0023] The length and number of the first narrow path and the third narrow path are the same.

[0024] The length of the second narrow diameter is greater than the length of the first narrow diameter and the third narrow diameter, and the number of the second narrow diameter is less than the number of the first narrow diameter and the third narrow diameter.

[0025] Further, the melt is provided with a plurality of first circular holes, second circular holes and third circular holes distributed along the width direction of the melt.

[0026] The melt between two adjacent first circular holes forms a first narrow diameter, the melt between two adjacent second circular holes forms a second narrow diameter, and the melt between two adjacent third circular holes forms a third narrow diameter.

[0027] Further, the short-circuit current is twice the rated current of the melt.

[0028] Compared with the prior art, the utility model has the beneficial effects of:

[0029] 1. The small breaking multiple melt structure provided by the utility model improves the minimum breaking capacity and shortens the minimum breaking time through the small breaking fuse part.

[0030] 2. The small breaking multiple melt structure provided by the utility model increases the length of the second narrow diameter when the number and width of the first narrow diameter, the second narrow diameter and the third narrow diameter are the same, thereby increasing the resistance of the small breaking fuse part, and the small breaking fuse part accumulates more heat when the short-circuit current passes through the melt, thereby improving the minimum breaking capacity and shortening the minimum breaking time.

[0031] 3. The small breaking multiple melt structure provided by the utility model reduces the number of the second narrow diameter when the length and width of the first narrow diameter, the second narrow diameter and the third narrow diameter are the same, thereby reducing the cross-sectional area of the small breaking fuse part, increasing the resistance of the small breaking fuse part, and the small breaking fuse part accumulates more heat when the short-circuit current passes through the melt, thereby improving the minimum breaking capacity and shortening the minimum breaking time.

[0032] 4. The small breaking multiple melt structure provided by the utility model increases the length of the second narrow diameter and reduces the number of the second narrow diameter when the width of the first narrow diameter, the second narrow diameter and the third narrow diameter is the same, thereby increasing the resistance of the small breaking fuse part, and the small breaking fuse part accumulates more heat when the short-circuit current passes through the melt, thereby improving the minimum breaking capacity and shortening the minimum breaking time. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a schematic view of the three-dimensional structure of the embodiment 1 of the utility model;

[0034] Figure 2 It is a rear view of Figure 1

[0035] Figure 3 It is a schematic view of the structure of the embodiment 2 of the utility model; ​

[0036] Figure 4 Figure 3 is a structural schematic diagram of the embodiment 3 of the present application.

[0037] Reference signs: 1, melt; 2, connecting plate; 3, first narrow diameter; 4, second narrow diameter; 5, third narrow diameter. DETAILED DESCRIPTION

[0038] The technical solutions in the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0039] Embodiment 1

[0040] As shown in Figure 1 and Figure 2 , a small breaking multiple melt structure comprises a melt 1, and the melt 1 is provided with a connecting plate 2 at both ends;

[0041] The melt 1 is provided with a small breaking fuse part, and a first fuse part and a second fuse part located on both sides of the small breaking fuse part; the resistance of the small breaking fuse part is greater than the resistance of the first fuse part and the second fuse part, and when a short-circuit current passes through the melt 1, the small breaking fuse part accumulates heat and melts (the small breaking fuse part is a breaking fuse part); wherein the short-circuit current is twice the rated current of the melt 1.

[0042] The first fuse part, the small breaking fuse part and the second fuse part are uniformly distributed on the melt 1 along the length direction of the melt 1.

[0043] The first fuse part comprises a plurality of first narrow diameters 3; the small breaking fuse part comprises a plurality of second narrow diameters 4; and the second fuse part comprises a plurality of third narrow diameters 5.

[0044] The number and width of the first narrow diameters 3, the second narrow diameters 4 and the third narrow diameters 5 are the same.

[0045] The length of the first narrow diameters 3 is the same as that of the third narrow diameters 5, and the length of the second narrow diameters 4 is greater than that of the first narrow diameters 3 and the third narrow diameters 5.

[0046] The melt 1 is provided with a plurality of uniformly distributed first circular holes, second strip-shaped holes and third circular holes along the width direction thereof;

[0047] The width direction of the second strip-shaped hole is consistent with the width direction of the melt 1.

[0048] The melt 1 between the adjacent two first circular holes forms the first narrow diameter 3, the melt 1 between the adjacent two second strip-shaped holes forms the second narrow diameter 4, and the melt 1 between the adjacent two third circular holes forms the third narrow diameter 5.

[0049] Embodiment 2

[0050] Embodiment 2 differs from Embodiment 1 in that, as shown in Figure 3 the length and width of the first narrow path 3, the second narrow path 4 and the third narrow path 5 are the same; the number of the first narrow path 3 and the third narrow path 5 is the same, and the number of the second narrow path 4 is less than that of the first narrow path 3 and the third narrow path 5.

[0051] The melt 1 is provided with a plurality of uniformly distributed first circular holes, second strip-shaped holes and third circular holes along the width direction thereof; the length direction of the second strip-shaped hole is consistent with the width direction of the melt 1; the melt 1 between two adjacent first circular holes forms the first narrow path 3, the melt 1 between two adjacent second strip-shaped holes forms the second narrow path 4, and the melt 1 between two adjacent third circular holes forms the third narrow path 5.

[0052] Embodiment 3

[0053] Embodiment 3 differs from Embodiment 1 in that, as shown in Figure 4 the width of the first narrow path 3, the second narrow path 4 and the third narrow path 5 is the same; the length and number of the first narrow path 3 and the third narrow path 5 are the same; the length of the second narrow path 4 is greater than that of the first narrow path 3 and the third narrow path 5, and the number of the second narrow path 4 is less than that of the first narrow path 3 and the third narrow path 5.

[0054] The melt 1 is provided with a plurality of uniformly distributed first circular holes, second circular holes and third circular holes along the width direction thereof; the melt 1 between two adjacent first circular holes forms the first narrow path 3, the melt 1 between two adjacent second circular holes forms the second narrow path 4, and the melt 1 between two adjacent third circular holes forms the third narrow path 5.

[0055] The above merely describes the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any change or replacement within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A low break-up multiple melt structure characterized by: The melt (1) is provided with connecting plates (2) at both ends thereof; The melt (1) is provided with a small breaking fuse section, and a first fuse section and a second fuse section respectively located on both sides of the small breaking fuse section; the resistance of the small breaking fuse section is greater than the resistance of the first fuse section and the second fuse section, and the small breaking fuse section melts when a short circuit current passes through the melt (1).

2. The small fragmentation ratio melt structure of claim 1, wherein: The first fuse section, the small breaking fuse section and the second fuse section are uniformly distributed along the length direction of the melt (1).

3. The small fragmentation ratio melt structure of claim 1, wherein: The first fuse section comprises a plurality of first narrow sections (3); the small breaking fuse section comprises a plurality of second narrow sections (4); and the second fuse section comprises a plurality of third narrow sections (5). The number and width of the first narrow sections (3), the second narrow sections (4) and the third narrow sections (5) are the same. The length of the first narrow sections (3) is the same as that of the third narrow sections (5), and the length of the second narrow sections (4) is greater than that of the first narrow sections (3) and the third narrow sections (5).

4. The small fragmentation ratio melt structure of claim 3, wherein: The melt (1) is provided with a plurality of first circular holes, second strip-shaped holes and third circular holes which are uniformly distributed along the width direction of the melt (1). The width direction of the second strip-shaped holes is consistent with the width direction of the melt (1). The melt (1) between adjacent two first circular holes forms a first narrow section (3), the melt (1) between adjacent two second strip-shaped holes forms a second narrow section (4), and the melt (1) between adjacent two third circular holes forms a third narrow section (5).

5. The small fragmentation ratio melt structure of claim 3, wherein: The length and width of the first narrow sections (3), the second narrow sections (4) and the third narrow sections (5) are the same. The number of the first narrow sections (3) is the same as that of the third narrow sections (5), and the number of the second narrow sections (4) is less than that of the first narrow sections (3) and the third narrow sections (5).

6. The small fragmentation ratio melt structure of claim 5, wherein: The melt (1) is provided with a plurality of first circular holes, second strip-shaped holes and third circular holes which are uniformly distributed along the width direction of the melt (1). The length direction of the second strip-shaped holes is consistent with the width direction of the melt (1). The melt (1) between adjacent two first circular holes forms a first narrow section (3), the melt (1) between adjacent two second strip-shaped holes forms a second narrow section (4), and the melt (1) between adjacent two third circular holes forms a third narrow section (5).

7. The small fragmentation ratio melt structure of claim 3, wherein: The width of the first narrow sections (3), the second narrow sections (4) and the third narrow sections (5) is the same. The length and number of the first narrow sections (3) and the third narrow sections (5) are the same. The length of the second narrow sections (4) is greater than that of the first narrow sections (3) and the third narrow sections (5), and the number of the second narrow sections (4) is less than that of the first narrow sections (3) and the third narrow sections (5).

8. The small fragmentation ratio melt structure of claim 7, wherein: The melt (1) is provided with a plurality of first circular holes, second circular holes and third circular holes which are uniformly distributed along the width direction of the melt (1). The melt (1) between adjacent two first circular holes forms a first narrow section (3), the melt (1) between adjacent two second circular holes forms a second narrow section (4), and the melt (1) between adjacent two third circular holes forms a third narrow section (5).

9. The small fragmentation ratio melt structure of claim 1, wherein: The short circuit current is twice the rated current of the melt (1).

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