Fuse, power distribution system and vehicle

Abstract

The utility model relates to a fuse, a power distribution system and a vehicle. The fuse comprises a housing; the first melt is arranged in the shell; the second melt is arranged in the shell; the first melt and the second melt are connected in parallel, and the melting point of the second melt is higher than that of the first melt. The first melt and the second melt with different melting points are connected in parallel, so that when current and voltage are abnormal, the first melt with the lower melting point is disconnected firstly, and the second melt with the higher melting point is disconnected subsequently, and graded fusing is realized. Meanwhile, the first melt and the second melt are both arranged in the shell, so that electric arcs generated when the first melt and / or the second melt are fused can be isolated by utilizing the shell, and the possibility that the surrounding combustible substances are ignited due to the migration of the electric arcs is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit safety, in particular to a fuse, a power distribution system and a vehicle. BACKGROUND

[0002] In the related art, a fuse is an electrical device used to protect electrical systems and equipment, mainly used to prevent circuit overload and short circuit. When the current flowing through it exceeds the rated value, it will automatically cut off the circuit to avoid damage to the equipment or fire hazards. Low-voltage fuses usually use tin alloy as the fuse, which has a relatively large resistivity and is suitable for low-voltage and small-current circuits. However, for high-voltage and high-current circuits, high-voltage fuses are required to have a large breaking fault current capacity. Therefore, high-voltage fuses need to safely and reliably break the arc, so copper or silver fuses are used, but the cost of copper and silver is high, which increases the cost. The tin alloy used in low-voltage fuses has a lower cost, but due to its low thermal conductivity, the melting speed is fast, usually within a few milliseconds to tens of milliseconds, which makes it easy to produce an arc at the break point, and the arc may ignite the surrounding flammable materials and cause a fire. SUMMARY

[0003] The embodiments of the present application provide a fuse, a power distribution system and a vehicle, which are used to improve the melting speed of the fuse to at least partially solve the above technical problems.

[0004] In order to achieve the above purpose, according to the first aspect of the present application, a fuse is provided, comprising: a housing;

[0005] a first fuse body arranged in the housing;

[0006] a second fuse body arranged in the housing;

[0007] The first fuse body and the second fuse body are connected in parallel, and the melting point of the second fuse body is higher than that of the first fuse body.

[0008] In some embodiments, the first fuse body and the second fuse body have different current-carrying capacities.

[0009] In some embodiments, the current-carrying capacity of the first fuse body is less than that of the second fuse body.

[0010] In some embodiments, the housing has a first accommodating cavity and a second accommodating cavity which are isolated from each other, the first fuse body is arranged in the first accommodating cavity, and the second fuse body is arranged in the second accommodating cavity.

[0011] In some embodiments, the fuse further comprises a first conductive member and a second conductive member;

[0012] The first conductive member and the second conductive member are fixedly connected with the shell, the first conductive member has a first connecting end extending into the shell, the second conductive member has a second connecting end extending into the shell, and the first fuse and the second fuse are connected in parallel between the first connecting end and the second connecting end.

[0013] In some embodiments, the first accommodating cavity is configured to satisfy at least one of the following:

[0014] The first accommodating cavity is provided with a first fuse limiting structure having a first accommodating space, one end of the first fuse is located in the first accommodating space and connected with the first connecting end, and the other end is connected with the second connecting end.

[0015] The first accommodating cavity is provided with a first fuse limiting structure having a first accommodating space, one end of the first fuse is located in the first accommodating space and connected with the second connecting end, and the other end is connected with the first connecting end.

[0016] And / or, the second accommodating cavity is configured to satisfy at least one of the following:

[0017] The second accommodating cavity is provided with a second fuse limiting structure having a second accommodating space, one end of the second fuse is located in the second accommodating space and connected with the first connecting end, and the other end is connected with the second connecting end.

[0018] The second accommodating cavity is provided with a second fuse limiting structure having a second accommodating space, one end of the second fuse is located in the second accommodating space and connected with the second connecting end, and the other end is connected with the first connecting end.

[0019] In some embodiments, the shell has a cavity, and the fuse further comprises a partition configured to divide the cavity into the first accommodating cavity and the second accommodating cavity.

[0020] In some embodiments, the shell and the partition are integrally formed; or, the partition is tightly connected with the inner wall of the shell.

[0021] In some embodiments, the shell comprises a detachably connected shell body and a second end cover, the partition, the shell body and the second end cover enclose to form the second accommodating cavity, and the connection of the second fuse with the first connecting end and the second connecting end is exposed in the second accommodating cavity; and / or,

[0022] The shell comprises a detachably connected shell body and a first end cover, the partition, the shell body and the first end cover enclose to form the first accommodating cavity, and the connection of the first fuse with the first connecting end and the second connecting end is exposed in the first accommodating cavity.

[0023] In some embodiments, the shell is provided with a first connecting structure, the first end cover is provided with a second connecting structure, the first connecting structure is connected with the second connecting structure, so that the first end cover is fixedly connected with the shell; and / or,

[0024] The shell is provided with a third connecting structure, the second end cover is provided with a fourth connecting structure, the third connecting structure is connected with the fourth connecting structure, so that the second end cover is fixedly connected with the shell.

[0025] In some embodiments, at least one of the shell, the first end cover and the second end cover is plastic.

[0026] In some embodiments, the second accommodating cavity is filled with arc extinguishing medium.

[0027] In some embodiments, the first fuse body is provided with a first fusing hole; and / or, the second fuse body is provided with a second fusing hole.

[0028] In some embodiments, the second fuse body is provided with arc extinguishing glue.

[0029] According to a second aspect of the present application, a power distribution system is provided, comprising the fuse as described above.

[0030] According to a third aspect of the present application, a vehicle is provided, comprising the fuse as described above or the power distribution system as described above.

[0031] In the fuse of the embodiments of the present application, by connecting the first fuse body and the second fuse body in parallel, the first fuse body with a lower melting point will be disconnected first when the current voltage is abnormal, and then the second fuse body with a higher melting point will be disconnected, so that the graded fusing can be realized. Meanwhile, the first fuse body and the second fuse body are both arranged in the shell, so that the arc generated when the first fuse body and / or the second fuse body are fused can be isolated by the shell, and the situation that the arc ignites the combustible material around the fuse and causes fire can be avoided.

[0032] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0034] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0035] Figure 1 is a sectional view of the fuse provided by some embodiments of the present application;

[0036] Figure 2 is Figure 1 is an exploded view of the fuse provided by some embodiments of the present application;

[0037] Figure 3 is Figure 1 is a top view of the fuse provided by some embodiments of the present application (the first end cover is not shown);

[0038] Figure 4 is Figure 1 is a bottom view of the fuse provided by some embodiments of the present application (the second end cover is not shown);

[0039] Figure 5 is another partition arrangement provided by some embodiments of the present application.

[0040] Explanation of reference signs:

[0041] 1, first fuse body; 11, first fuse body limiting structure; 2, second fuse body; 21, second fuse body limiting structure; 3, first conductive member; 31, first connecting end; 4, second conductive member; 41, second connecting end; 5, partition; 6, second end cover; 61, fourth connecting structure; 7, first end cover; 71, second connecting structure; 8, first fusing hole; 9, second fusing hole; 10, arc extinguishing glue;

[0042] 100, housing; 101, first accommodating cavity; 102, second accommodating cavity; 103, shell; 104, first connecting structure; 105, third connecting structure. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0044] According to a first aspect of the present application, please refer to Figure 1 and Figure 2 , Figure 1 is a sectional view of the fuse provided by some embodiments of the present application, Figure 2 is Figure 1 is an exploded view of the fuse provided by some embodiments of the present application, and the present application provides a fuse, comprising: a housing 100; a first fuse body 1 arranged in the housing 100; a second fuse body 2 arranged in the housing 100; the first fuse body 1 and the second fuse body 2 are connected in parallel, and the melting point of the second fuse body 2 is higher than the melting point of the first fuse body 1.

[0045] In the embodiments of the present application, the first melt 1 and the second melt 2 are connected in parallel, and the two melts have different melting points. When the current voltage is abnormal, the first melt 1 with a lower melting point will be disconnected first, and then the second melt 2 with a higher melting point will be disconnected. In this way, the graded fusing can be realized. Meanwhile, the first melt 1 and the second melt 2 of the fuse provided by the present application are arranged in the shell 100, so that the arc generated when the first melt 1 and / or the second melt 2 is fused can be isolated by the shell 100, and the situation that the arc ignites the combustible material around the fuse and causes a fire can be avoided. In addition, the main reason for the fuse to be fused is that the instantaneous current is too large. The parallel connection of the first melt 1 and the second melt 2 can increase the current that the fuse can bear, so that the fuse can be applied to a large-current scene. Moreover, the melting point of the melt is related to the thickness of the melt. In this way, in the case that the maximum value of the current in the use scene is unchanged, the first melt 1 with a low melting point can be used to share part of the current, so that the current value borne by the second melt 2 with a high melting point is reduced, thereby reducing the material for manufacturing the second melt 2. The material commonly used for the melt with a high melting point is copper or silver, but the prices of copper and silver are high. Therefore, the fuse including the first melt 1 and the second melt 2 connected in parallel and having different melting points provided by the present application can help to reduce the production cost of the fuse.

[0046] Exemplarily, the material of the first melt 1 is tin alloy or lead, and the material of the second melt 2 is silver alloy or copper.

[0047] In some embodiments of the present application, the first melt 1 and the second melt 2 have different current-carrying capacities. In this way, the melt with a lower current-carrying capacity can be disconnected first, and then the melt with a higher current-carrying capacity can be disconnected, so as to realize the graded fusing. Exemplarily, the second melt 2 carries more than 90% of the current, and the first melt 1 carries the remaining part of the current.

[0048] In some embodiments of the present application, the current-carrying capacity of the first melt 1 is less than the current-carrying capacity of the second melt 2.

[0049] Please continue to refer to Figure 1 and Figure 2 In some embodiments of the present application, the shell 100 has a first accommodating cavity 101 and a second accommodating cavity 102 which are isolated from each other. The first melt 1 is arranged in the first accommodating cavity 101, and the second melt 2 is arranged in the second accommodating cavity 102.

[0050] With such a scheme, the first melt 1 and the second melt 2 are located in different accommodating cavities, which can reduce the influence of the liquid metal splashing caused by the melting of the first melt 1 on the second melt 2. Meanwhile, since the melting point of the first melt 1 is lower than that of the second melt 2, the current borne by the second melt 2 is greater than that borne by the first melt 1, and thus the possibility of arc generated by the melting of the second melt 2 is higher than that of the first melt 1. Therefore, the first melt 1 and the second melt 2 are respectively located in different accommodating cavities, which facilitates the design of different arc extinguishing modes for melts with different melting points. For example, the second accommodating cavity 102 accommodating the second melt 2 is filled with arc extinguishing medium, which can quickly extinguish the arc generated by the melting of the second melt 2 with a high melting point. The first accommodating cavity 101 accommodating the first melt 1 is not filled with arc extinguishing medium, which can reduce the production cost of the fuse.

[0051] Please refer to Figures 1 to 4 , Figure 3 is Figure 1 the top view of the fuse provided by the present application (the first end cover 7 is not shown), Figure 4 is Figure 1 the bottom view of the fuse provided by the present application (the second end cover 6 is not shown), in some embodiments of the present application, the fuse further comprises a first conductive member 3 and a second conductive member 4; the first conductive member 3 and the second conductive member 4 are fixedly connected with the shell 100, the first conductive member 3 has a first connecting end 31 extending into the shell 100, the second conductive member 4 has a second connecting end 41 extending into the shell 100, and the first melt 1 and the second melt 2 are connected in parallel between the first connecting end 31 and the second connecting end 41.

[0052] In the embodiments of the present application, the first melt 1 and the second melt 2 are connected in parallel through the first conductive member 3 and the second conductive member 4, and the first conductive member 3 and the second conductive member 4 are fixedly connected with the shell 100, so that the connection relationship among the first melt 1, the second melt 2, the first conductive member 3 and the second conductive member 4 is more stable, and the reliability of the fuse can be improved.

[0053] Please continue to refer to Figures 1 to 4 In some embodiments of the present application, the first accommodating cavity 101 is configured to satisfy at least one of the following:

[0054] The first accommodating cavity 101 is provided with a first melt limiting structure 11, the first melt limiting structure 11 has a first accommodating space (not shown in the figure), one end of the first melt 1 is located in the first accommodating space and connected with the first connecting end 31, and the other end is connected with the second connecting end 41;

[0055] The first accommodating cavity 101 is provided with a first fuse limiting structure 11, the first fuse limiting structure 11 has a first accommodating space (not shown in the figure), one end of the first fuse 1 is located in the first accommodating space and connected with the second connecting end 41, and the other end is connected with the first connecting end 31.

[0056] In the embodiment of the present application, the first accommodating cavity 101 is provided with the first fuse limiting structure 11, so that the first fuse limiting structure 11 can be used to connect the first fuse 1 and the first conductive part 3 at a preset position, which helps to improve the reliability of the fuse.

[0057] Please continue to refer to Figures 1 to 4 In some embodiments of the present application, the second accommodating cavity 102 is configured to satisfy at least one of the following:

[0058] The second accommodating cavity 102 is provided with a second fuse limiting structure 21, the second fuse limiting structure 21 has a second accommodating space (not shown in the figure), one end of the second fuse 2 is located in the second accommodating space and connected with the first connecting end 31, and the other end is connected with the second connecting end 41.

[0059] The second accommodating cavity 102 is provided with a second fuse limiting structure 21, the second fuse limiting structure 21 has a second accommodating space (not shown in the figure), one end of the second fuse 2 is located in the second accommodating space and connected with the second connecting end 41, and the other end is connected with the first connecting end 31.

[0060] Similar or identical to the technical effects of the above-mentioned embodiment of the first accommodating cavity 101 provided with the first fuse limiting structure 11, which will not be repeated here.

[0061] In some embodiments of the present application, one end of the second fuse 2 is located in the second accommodating space (not shown in the figure) and connected with the second connecting end 41, and the other end is connected with the first connecting end 31. Similar or identical to the technical effects of the above-mentioned embodiment of the first accommodating cavity 101 provided with the first fuse limiting structure 11, which will not be repeated here.

[0062] Please continue to refer to Figures 1 to 5 In some embodiments of the present application, the shell 100 has a cavity, and the fuse further includes a partition 5, the partition 5 is configured to separate the cavity into the first accommodating cavity 101 and the second accommodating cavity 102.

[0063] In the embodiment of the present application, the partition 5 separates the cavity of the shell 100 in many ways, one is Figure 2 The way shown in the figure, wherein the first fuse 1 and the second fuse 2 are located on the opposite sides of the first conductive part 3 and the second conductive part 4. Another can refer to Figure 5 , Figure 5The first melt 1 and the second melt 2 are located on the same side of the first conductive member 3 and the second conductive member 4.

[0064] In some embodiments of the present application, the partition 5 is connected with the first conductive member 3 and the second conductive member 4.

[0065] In some embodiments of the present application, the shell 100 is integrally formed with the partition 5.

[0066] In the embodiments of the present application, the shell 100 is integrally formed with the partition 5, which on one hand helps to simplify the manufacturing process of the shell 100 and the partition 5, and on the other hand, the integrally formed shell 100 and partition 5 help to improve the non-communication of the first accommodating cavity 101 and the second accommodating cavity 102, and facilitate the setting of different arc extinguishing modes for the two accommodating cavities.

[0067] In some embodiments of the present application, the partition 5 is tightly connected with the inner wall of the shell 100.

[0068] By adopting such a scheme, the non-communication of the first accommodating cavity 101 and the second accommodating cavity 102 can be improved, and different arc extinguishing modes can be set for the two accommodating cavities.

[0069] Please continue to refer to Figures 1 to 4 In some embodiments of the present application, the shell 100 includes a detachably connected shell body 103 and a second end cover 6, the partition 5, the shell body 103 and the second end cover 6 enclose to form the second accommodating cavity 102, and the connection between the second melt 2 and the first connecting end 31 and the second connecting end 41 is exposed in the second accommodating cavity 102.

[0070] In the embodiments of the present application, the second accommodating cavity 102 is formed by the partition 5, the shell body 103 and the second end cover 6, so that the arc generated when the second melt 2 is fused will be limited in the second accommodating cavity 102, which can avoid the situation that the arc ignites the surrounding combustible material when it wanders, and improve the use safety of the fuse provided by the present application.

[0071] Please continue to refer to Figures 1 to 4 In some embodiments of the present application, the shell 100 includes a detachably connected shell body 103 and a first end cover 7, the partition 5, the shell body 103 and the first end cover 7 enclose to form the first accommodating cavity 101, and the connection between the first melt 1 and the first connecting end 31 and the second connecting end 41 is exposed in the first accommodating cavity 101. The technical effects of the above-mentioned embodiments of the shell 100 including a detachably connected shell body 103 and a second end cover 6, the partition 5, the shell body 103 and the second end cover 6 enclosing to form the second accommodating cavity 102 are similar or identical, and will not be described here.

[0072] Please continue to refer toFigures 1 to 4 In some embodiments of the present application, the first connecting structure 104 is arranged on the shell 103, and the second connecting structure 71 is arranged on the first end cover 7. The first connecting structure 104 is connected with the second connecting structure 71, so that the first end cover 7 is fixedly connected with the shell 103.

[0073] The common connection mode of the shell 100 of the fuse and the end cover is bolt connection. Not only is it necessary to arrange corresponding connecting structures, such as connecting holes, on the shell 100 and the end cover, but also it is necessary to cooperate with nuts, screws and the like. The components are many, and the connection mode is relatively complicated. In the embodiments of the present application, the first connecting structure 104 and the second connecting structure 71 are arranged on the shell 103 and the first end cover 7 respectively, so that the fixed connection of the shell 103 and the first end cover 7 can be realized only by using the first connecting structure 104 and the second connecting structure 71. No cooperation with other components is needed, and the connection mode is simple and reliable.

[0074] In some embodiments of the present application, the first connecting structure 104 is a connecting hole, and the second connecting structure 71 is a connecting block. The connecting hole is connected with the connecting block in a clamping manner, which is convenient and reliable, and is not easy to be damaged.

[0075] Please continue to refer to Figures 1 to 4 In some embodiments of the present application, the third connecting structure 105 is arranged on the shell 103, and the fourth connecting structure 61 is arranged on the second end cover 6. The third connecting structure 105 is connected with the fourth connecting structure 61, so that the second end cover 6 is fixedly connected with the shell 103. The technical effects of the embodiments in which the first connecting structure 104 is arranged on the shell 103, and the second connecting structure 71 is arranged on the first end cover 7, and the first connecting structure 104 is connected with the second connecting structure 71 to fix the first end cover 7 with the shell 103 are similar or the same, and will not be described here.

[0076] It should be noted that the specific arrangement forms of the first connecting structure 104 and the second connecting structure 71 in the present application can be the same as the arrangement forms of the third connecting structure 105 and the fourth connecting structure 61, for example, both in the form of clamping. However, in some embodiments of the present application, the second accommodating cavity 102 will be filled with arc-extinguishing medium. In order to avoid the escape or leakage of the arc-extinguishing medium, the connection mode of the third connecting structure 105 and the fourth connecting structure 61 can adopt a more sealed mode, for example, the third connecting structure 105 is changed from a connecting hole to a groove. In this way, the selection range of the arc-extinguishing medium filled in the second accommodating cavity 102 is wider, and the appropriate arc-extinguishing medium can be selected according to the material of the second fuse body 2, the current borne by the second fuse body 2 and the use scene of the fuse and the like. Exemplarily, the filling hole is filled in a glue pouring mode.

[0077] In some embodiments of the present application, at least one of the shell 103, the first end cover 7 and the second end cover 6 is made of plastic. In this way, the weight of the fuse can be reduced, and the fuse can be lightened.

[0078] In some embodiments of the present application, the second accommodating cavity 102 is filled with arc extinguishing medium. In this way, the arc generated when the second fuse 2 is blown can be extinguished in time by the arc extinguishing medium, and the possibility of igniting the surrounding combustible material due to the arc wandering can be reduced.

[0079] In some embodiments of the present application, the shell 100 is provided with a filling hole. The arc extinguishing medium is filled into the second accommodating cavity 102 through the filling hole. In addition, for different forms of arc extinguishing medium, a sealing structure with high sealing performance can also be arranged at the filling hole, for example, for liquid and gaseous arc extinguishing medium, a sealing ring can be arranged at the filling hole to prevent the arc extinguishing medium from leaking. For solid arc extinguishing medium, whether to arrange a sealing structure can be selected according to the specific form of the arc extinguishing medium, for example, when the arc extinguishing medium is in powder form, the arc extinguishing medium particles are small and easy to leak, and a sealing structure with certain sealing performance needs to be arranged, and when the arc extinguishing medium particles are large, the sealing structure can be selected not to be arranged.

[0080] Please continue to refer to Figures 1 to 4 In some embodiments of the present application, the first fuse 1 is provided with a first blow hole 8. In this way, the first fuse 1 can be blown from the first blow hole 8, which helps to speed up the blowing speed of the first fuse 1 and achieve the purpose of quickly cutting off the circuit.

[0081] Please continue to refer to Figures 1 to 4 In some embodiments of the present application, the second fuse 2 is provided with a second blow hole 9. In this way, the second fuse 2 can be blown from the second blow hole 9, which helps to speed up the blowing speed of the second fuse 2 and achieve the purpose of quickly cutting off the circuit.

[0082] Please continue to refer to Figures 1 to 4 In some embodiments of the present application, the second fuse 2 is provided with arc extinguishing glue 10. In this way, the arc extinguishing glue 10 can extinguish the arc generated when the second fuse 2 is blown in time, and the possibility of igniting the combustible material due to the arc wandering can be reduced.

[0083] According to the second aspect of the present application, a power distribution system is provided, which comprises the fuse as described above, and has all the beneficial effects of the fuse as described above, which will not be repeated here.

[0084] According to the third aspect of the present application, a vehicle is provided, which comprises the fuse as described above or the power distribution system as described above, and has all the beneficial effects of the fuse as described above, which will not be repeated here.

[0085] The vehicle can be a fuel automobile, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and the present application does not make specific limitation thereto.

[0086] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0087] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0088] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0089] The above is only the preferred embodiment of the present application, and does not limit the present application in any form, but any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present application without departing from the technical solution content of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A fuse, characterized in that, include: Outer shell (100); A first melt (1) is disposed within the outer casing (100); The second melt (2) is disposed inside the outer shell (100); The first melt (1) and the second melt (2) are connected in parallel, and the melting point of the second melt (2) is higher than that of the first melt (1).

2. The fuse according to claim 1, characterized in that, The first melt (1) and the second melt (2) have different flow rates.

3. The fuse according to claim 2, characterized in that, The flow rate of the first melt (1) is less than that of the second melt (2).

4. The fuse according to claim 1, characterized in that, The outer shell (100) has a first receiving cavity (101) and a second receiving cavity (102) that are isolated from each other. The first melt (1) is disposed in the first receiving cavity (101) and the second melt (2) is disposed in the second receiving cavity (102).

5. The fuse according to claim 4, characterized in that, The fuse also includes a first conductive element (3) and a second conductive element (4); The first conductive element (3) and the second conductive element (4) are both fixedly connected to the outer shell (100). The first conductive element (3) has a first connecting end (31) extending into the outer shell (100), and the second conductive element (4) has a second connecting end (41) extending into the outer shell (100). The first melt (1) and the second melt (2) are connected in parallel between the first connecting end (31) and the second connecting end (41).

6. The fuse according to claim 5, characterized in that, The first receiving cavity (101) is configured to satisfy at least one of the following: The first accommodating cavity (101) is provided with a first melt limiting structure (11), the first melt limiting structure (11) has a first accommodating space, one end of the first melt (1) is located in the first accommodating space and is connected to the first connecting end (31), and the other end is connected to the second connecting end (41); The first accommodating cavity (101) is provided with a first melt limiting structure (11), the first melt limiting structure (11) has a first accommodating space, one end of the first melt (1) is located in the first accommodating space and is connected to the second connecting end (41), and the other end is connected to the first connecting end (31); And / or, the second receiving cavity (102) is configured to satisfy at least one of the following: The second accommodating cavity (102) is provided with a second melt limiting structure (21), the second melt limiting structure (21) has a second accommodating space, one end of the second melt (2) is located in the second accommodating space and is connected to the first connecting end (31), and the other end is connected to the second connecting end (41); The second accommodating cavity (102) is provided with a second melt limiting structure (21), the second melt limiting structure (21) has a second accommodating space, one end of the second melt (2) is located in the second accommodating space and is connected to the second connecting end (41), and the other end is connected to the first connecting end (31).

7. The fuse according to claim 5, characterized in that, The housing (100) has a cavity, and the fuse further includes a separator (5) configured to divide the cavity into a first receiving cavity (101) and a second receiving cavity (102).

8. The fuse according to claim 7, characterized in that, The outer shell (100) and the partition (5) are integrally formed; or, the partition (5) is tightly connected to the inner wall of the outer shell (100).

9. The fuse according to claim 8, characterized in that, The outer casing (100) includes a detachably connected housing (103) and a second end cap (6). The separator (5), the housing (103), and the second end cap (6) enclose a second receiving cavity (102). The connection points between the second melt (2) and the first connecting end (31) and the second connecting end (41) are exposed within the second receiving cavity (102); and / or, The outer casing (100) includes a detachably connected housing (103) and a first end cap (7). The separator (5), the housing (103) and the first end cap (7) enclose the first receiving cavity (101). The connection points of the first melt (1) with the first connecting end (31) and the second connecting end (41) are exposed in the first receiving cavity (101).

10. The fuse according to claim 9, characterized in that, The housing (103) is provided with a first connecting structure (104), and the first end cap (7) is provided with a second connecting structure (71). The first connecting structure (104) is connected to the second connecting structure (71), so that the first end cap (7) is fixedly connected to the housing (103); and / or, The housing (103) is provided with a third connecting structure (105), and the second end cap (6) is provided with a fourth connecting structure (61). The third connecting structure (105) is connected to the fourth connecting structure (61), so that the second end cap (6) is fixedly connected to the housing (103).

11. The fuse according to claim 9, characterized in that, At least one of the housing (103), the first end cap (7), and the second end cap (6) is made of plastic.

12. The fuse according to claim 4, characterized in that, The second receiving cavity (102) is filled with an arc-extinguishing medium.

13. The fuse according to claim 1, characterized in that, The first melt (1) is provided with a first fuse hole (8); and / or the second melt (2) is provided with a second fuse hole (9).

14. The fuse according to claim 1, characterized in that, Arc-quenching adhesive (10) is provided on the second melt (2).

15. A power distribution system, characterized in that, Includes the fuse as described in any one of claims 1 to 14.

16. A vehicle, characterized in that, Includes the fuse as described in any one of claims 1 to 14 or the power distribution system as described in claim 15.

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