New energy combined fuse

Abstract

The utility model relates to a new energy combined fuse. The new energy combined fuse comprises a rigid insulating tube, a flexible insulating tube, a pair of positioning pieces, a fuse wire and arc extinguishing particles, the flexible insulating tube is accommodated in the rigid insulating tube, the two positioning pieces are respectively sleeved at two ends of the rigid insulating tube in an interference manner, bosses extending along the axial direction are arranged in the positioning pieces, the bosses are inserted into the flexible insulating tube in an interference manner so as to enable the flexible insulating tube to be fixedly arranged in the rigid insulating tube, and the fuse wire penetrates through the flexible insulating tube and is fixedly connected to the positioning pieces. The arc extinguishing particles are filled in the flexible insulating tube to wrap the fuse wire. The relative positions of the flexible insulating tube and the rigid insulating tube are fixed by utilizing the bosses of the positioning pieces, only extrusion force needs to be applied to the positioning pieces from the two ends of the two tubes during assembly, the assembly is convenient and efficient, and the stability of the relative positions between the rigid insulating tube and the flexible insulating tube is improved through an interference assembly mode.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a new energy combined fuse. Background Art

[0002] With the increase of environmental awareness, new energy storage technology has developed rapidly. At present, new energy storage equipment mainly uses electricity to operate. Therefore, power safety is an important factor affecting the safety performance of new energy storage equipment. Usually, new energy storage equipment uses fuses to avoid safety accidents caused by short circuits and overcurrents. With the increase of voltage platforms, 1000V fuses are needed.

[0003] Most existing fuses use a single tube structure and mainly use ceramic tubes or melamine tubes. For a 1000V voltage platform, when a fuse with a ceramic tube as the main structure encounters a short circuit at a voltage of 1000V, the energy released by the current will break through the tube body, causing the tube body to burst, and cannot effectively protect the circuit and the integrity of the appearance of the fuse. When a fuse with a melamine tube as the main structure encounters a short circuit at a voltage of 1000V, the energy released by the current will cause the tube body to burn. Therefore, a fuse with inner and outer tubes nested together has emerged. The outer tube is a ceramic tube, and the inner tube is a melamine tube. The melamine tube releases gas when in contact with the arc to disperse the arc, thereby improving the arc extinguishing effect.

[0004] In order to ensure the structural stability of the fuse, the positions of the ceramic tube and the melamine tube need to be kept relatively fixed. For this double-tube structure, the common fixing method is to insert the melamine tube into the ceramic tube with interference fit. Since the internal pressure of this double-tube fuse increases suddenly when it actually blows, the assembly pressure of the melamine tube on the ceramic tube will undoubtedly increase the risk of the ceramic tube bursting; another fixing method is to use glue to fix it, which requires pre-coating glue on the inner wall of the ceramic tube or the outer wall of the melamine tube. When the melamine tube is inserted, part of the glue will be scraped off, resulting in a loose bond between the ceramic tube and the melamine tube, and the assembly efficiency is also low. Utility Model Content

[0005] In view of the shortcomings of increasing the risk of ceramic tube bursting, structural instability and low assembly efficiency when assembling the ceramic tube and melamine tube in the existing double-tube fuse, it is necessary to provide a new energy combined fuse.

[0006] A new energy combined fuse, comprising:

[0007] Rigid insulating tube;

[0008] A flexible insulating tube, the flexible insulating tube being accommodated in the rigid insulating tube;

[0009] A pair of positioning members, the two positioning members are respectively sleeved at two ends of the rigid insulating tube, the positioning members are provided with bosses extending in the axial direction, and the bosses are inserted in the flexible insulating tube in an interference manner so that the flexible insulating tube is fixed in the rigid insulating tube;

[0010] a fuse, the fuse being passed through the flexible insulating tube and fixedly connected to the positioning member; and

[0011] Arc extinguishing particles are filled in the flexible insulating tube to wrap the fuse.

[0012] With such a configuration, the boss of the positioning piece is used to fix the relative position of the flexible insulating tube and the rigid insulating tube. During assembly, it is only necessary to apply extrusion pressure to the positioning piece from both ends of the two tubes. The assembly is convenient and efficient, and the stability of the relative position between the rigid insulating tube and the flexible insulating tube is improved through the interference fit assembly method.

[0013] In one embodiment, the difference between the inner diameter of the rigid insulating tube and the outer diameter of the flexible insulating tube is greater than 0 mm and less than or equal to 2 mm.

[0014] Such an arrangement not only facilitates the insertion of the flexible insulating tube into the rigid insulating tube, but also reserves space for the flexible insulating tube to expand and deform outwards.

[0015] In one embodiment, two ends of the flexible insulating tube abut against the inner wall of the rigid insulating tube.

[0016] Such an arrangement is conducive to preventing the flexible insulating tube from shaking and increasing the structural stability of the fuse.

[0017] In one embodiment, the rigid insulating tube is a ceramic tube, and the flexible insulating tube is a melamine tube.

[0018] Such arrangement is conducive to reducing production costs because ceramic tubes and melamine tubes are low in cost and easy to produce and process.

[0019] In one embodiment, the diameter of the boss gradually decreases in the axial direction approaching the flexible insulating tube.

[0020] With such arrangement, the boss can be smoothly inserted into the flexible insulating tube, and as the boss is continuously inserted, the sleeve connection between the boss and the flexible insulating tube becomes more secure.

[0021] In one embodiment, the positioning member includes a cap that is interference-fitted on the end of the rigid insulating tube and a positioning terminal that is fixedly connected to the cap and provides the boss.

[0022] Such a configuration and the split assembly structure are conducive to simplifying the mold, thereby reducing the difficulty of production and improving the yield rate.

[0023] In one embodiment, the cap includes a cover plate portion sealed on the rigid insulating tube and provided with a mounting hole, and a sleeve portion extending axially from the cover plate portion, wherein the sleeve portion abuts against an outer wall of the rigid insulating tube;

[0024] The positioning terminal includes a fixing portion fixedly connected to the side of the cover portion facing the rigid insulating tube, a positioning portion axially extending from the fixing portion and penetrating the mounting hole, and a boss axially extending from the fixing portion in a direction away from the positioning portion.

[0025] With such arrangement, the positioning terminal is pre-positioned by inserting the positioning portion into the mounting hole of the cap, thus facilitating assembly.

[0026] In one embodiment, the positioning member has an installation channel which passes through the positioning portion, the fixing portion and the boss in sequence along the axial direction, and the fuse is passed through the installation channel and fixedly connected to the positioning portion.

[0027] With such arrangement, the positioning portion of the positioning terminal is also used to position the fuse, which helps to prevent the fuse from shaking and facilitates further welding of the fuse and the positioning terminal.

[0028] In one of the embodiments, the positioning member further comprises a guide surface located on a side of the installation channel close to the flexible insulating tube, and the guide surface gradually moves away from the fuse in a direction axially close to the flexible insulating tube.

[0029] With such arrangement, under the guidance of the guide surface, the fuse can smoothly enter the installation channel of the positioning terminal, thereby reducing the difficulty of assembly.

[0030] In one embodiment, the guide surface extends from the boss to the positioning portion and the side of the guide surface away from the flexible insulating tube is joined to the fuse to form an exhaust groove, and the positioning member is further provided with an exhaust hole that passes through the fixing portion and is connected to the exhaust groove and the mounting hole.

[0031] In this way, the guide surface is also used to combine with the outer surface of the fuse to form an exhaust groove. The structure is ingenious, and the exhaust path formed also has a guiding effect on the arc. When the arc contacts the inner wall of the melamine tube, the melamine tube decomposes to obtain various gases, which increases the internal air pressure of the fuse and also blows away the arc. The exhaust groove can disperse the arc to avoid the arc being too concentrated at the exhaust port and causing reignition.

[0032] In one embodiment, the positioning member is a pair of petals symmetrically arranged on both sides of the fuse and welded to the fuse.

[0033] Such an arrangement not only facilitates assembly, but also ensures the production accuracy of the installation channel, and is conducive to closely fitting the positioning terminal to the fuse.

[0034] In one of the embodiments, the positioning member is provided with a feed port, and the new energy combined fuse further comprises a blocking member sealed at the feed port.

[0035] With such arrangement, arc extinguishing particles can be produced as a separate process, which is conducive to modular production. Arc extinguishing particles can be selectively filled according to actual needs, which facilitates users' independent selection. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of a fuse in an embodiment provided in the present application;

[0037] Figure 2 for Figure 1 a side view of the fuse shown;

[0038] Figure 3 for Figure 2 A partial enlarged view of the fuse at position X is shown;

[0039] Figure 4 for Figure 2 The fuse is shown in a cross-sectional view along the AA axis.

[0040] Reference numerals:

[0041] 10. Rigid insulating tube; 20. Flexible insulating tube; 30. Positioning piece; 301. Installation channel; 302. Guide surface; 31. Cap; 311. Cover plate; 3111. Installation hole; 312. Socket part; 32. Positioning terminal; 321. Fixing part; 3211. Exhaust hole; 322. Positioning part; 323. Boss; 40. Fuse; 50. Arc extinguishing particles; 60. Sealing piece. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0048] With the increase of environmental awareness, new energy storage technology has developed rapidly. At present, new energy storage equipment mainly uses electricity to operate. Therefore, power safety is an important factor affecting the safety performance of new energy storage equipment. Usually, new energy storage equipment uses fuses to avoid safety accidents caused by short circuits and overcurrents. With the increase of voltage platforms, 1000V fuses are needed.

[0049] Most existing fuses use a single tube structure and mainly use ceramic tubes or melamine tubes. For a 1000V voltage platform, when a fuse with a ceramic tube as the main structure encounters a short circuit at a voltage of 1000V, the energy released by the current will break through the tube body, causing the tube body to burst, and cannot effectively protect the circuit and the integrity of the appearance of the fuse. When a fuse with a melamine tube as the main structure encounters a short circuit at a voltage of 1000V, the energy released by the current will cause the tube body to burn. Therefore, a fuse with inner and outer tubes nested together has emerged. The outer tube is a ceramic tube, and the inner tube is a melamine tube. The melamine tube releases gas when in contact with the arc to disperse the arc, thereby improving the arc extinguishing effect.

[0050] In order to ensure the structural stability of the fuse, the positions of the ceramic tube and the melamine tube need to be kept relatively fixed. For this double-tube structure, the common fixing method is to insert the melamine tube into the ceramic tube with interference fit. Since the internal pressure of this double-tube fuse increases suddenly when it actually blows, the assembly pressure of the melamine tube on the ceramic tube will undoubtedly increase the risk of the ceramic tube bursting; another fixing method is to use glue to fix it, which requires pre-coating glue on the inner wall of the ceramic tube or the outer wall of the melamine tube. When the melamine tube is inserted, part of the glue will be scraped off, resulting in a loose bond between the ceramic tube and the melamine tube, and the assembly efficiency is also low.

[0051] Based on this, it is necessary to provide a new energy combined fuse with stable structure and efficient assembly.

[0052] See also Figure 1 , Figure 2 and Figure 4 , Figure 1 This is a schematic diagram of the structure of a fuse in an embodiment provided in the present application. Figure 2 for Figure 1Side view of the fuse shown Figure 4 is Figure 2 Cross-sectional view of the fuse shown in the A-A direction. A new energy combined fuse provided by the present application includes a rigid insulating tube 10, a flexible insulating tube 20, a pair of positioning members 30, a fuse wire 40, and arc extinguishing particles 50. The flexible insulating tube 20 is accommodated in the rigid insulating tube 10. The two positioning members 30 are respectively press-fitted on both ends of the rigid insulating tube 10. A boss 323 extending axially is provided in the positioning member 30. The boss 323 is press-fitted into the flexible insulating tube 20 to fix the flexible insulating tube 20 in the rigid insulating tube 10. The fuse wire 40 passes through the flexible insulating tube 20 and is fixedly connected to the positioning member 30. The arc extinguishing particles 50 are filled in the flexible insulating tube 20 to wrap the fuse wire 40. The relative position of the flexible insulating tube 20 and the rigid insulating tube 10 is fixed by the boss 323 of the positioning member 30. During assembly, only a squeezing force needs to be applied to the positioning member 30 from both ends of the two tubes, and the assembly is convenient and efficient. Moreover, the relative position stability between the rigid insulating tube 10 and the flexible insulating tube 20 is improved by the press-fitting assembly method. The relative position between the two positioning members 30 is fixed by the rigid insulating tube 10, and the flexible insulating tube 20 is fixed by the positioning member 30 and does not directly contact the rigid insulating tube 10. This indirect fixing method enables the rigid insulating tube 10 and the flexible insulating tube 20 to be fixed without relying on contact, which not only facilitates the insertion of the flexible insulating tube 20 into the rigid insulating tube 10 but also avoids the flexible insulating tube 20 exerting a large squeezing force on the rigid insulating tube 10, which is beneficial to reducing the risk of bursting of the rigid insulating tube. In addition, the positioning member 30 is press-fitted on the rigid insulating tube 10, that is, a tightening force is applied to both ends of the rigid insulating tube 10. When the flexible insulating tube 20 deforms due to the press-fitting insertion of the boss 323 and exerts a squeezing force on the inner wall of the rigid insulating tube 10, the tightening force and the squeezing force can cancel each other out, thereby further reducing the risk of bursting of the rigid insulating tube 10.

[0053] Optionally, in an embodiment provided by the present application, the difference between the inner diameter of the rigid insulating tube 10 and the outer diameter of the flexible insulating tube 20 is greater than 0 mm and less than or equal to 2 mm, which not only facilitates the insertion of the flexible insulating tube 20 into the rigid insulating tube 10 but also reserves a space for the flexible insulating tube 20 to expand and deform outward.

[0054] Optionally, in an embodiment provided by the present application, both ends of the flexible insulating tube 20 abut against the inner wall of the rigid insulating tube 10, which is beneficial to avoiding the shaking of the flexible insulating tube 20 and increasing the structural stability of the fuse.

[0055] Optionally, in an embodiment provided by the present application, the rigid insulating tube 10 is a ceramic tube, and the flexible insulating tube 20 is a melamine tube. The ceramic tube and the melamine tube have low costs and are easy to produce and process, which is beneficial to reducing the production cost.

[0056] Optionally, in an embodiment provided by the present application, the diameter of the boss 323 gradually decreases along the axial direction towards the flexible insulating tube 20. In this way, the side surface of the boss 323 is an abutting inclined surface, which facilitates the smooth insertion of the boss 323 into the flexible insulating tube 20, and as the boss 323 is continuously inserted, the socket connection between the boss 323 and the flexible insulating tube 20 becomes more firm. The fuse 40 is a plurality of stacked metal sheets, and each metal sheet includes a shunt portion located between two bosses 323 and a connection portion located outside the two bosses 323. The connection portions of each metal sheet are stacked, and the shunt portions of each metal sheet are arranged at intervals.

[0057] Please refer to Figure 3 and Figure 4 , Figure 3 is Figure 2 a partial enlarged view of the fuse shown at X. Specifically, the positioning member 30 includes a cap 31 and a positioning terminal 32. The cap 31 is interference-fitted on the end of the rigid insulating tube 10, and the positioning terminal 32 is fixedly connected to the inside of the cap 31 and provides the boss 323. Dividing the positioning member 30 into the cap 31 and the positioning terminal 32 is beneficial to simplifying the mold, thereby reducing the production difficulty and improving the yield. Further, the cap 31 includes a cover plate portion 311 and a socket portion 312. The cover plate portion 311 seals the rigid insulating tube 10 and is provided with a mounting hole 3111. The socket portion 312 extends axially from the cover plate portion 311, and the socket portion 312 abuts against the outer wall of the rigid insulating tube 10. The positioning terminal 32 includes a fixing portion 321, a positioning portion 322, and a boss 323. The fixing portion 321 is fixedly connected to the side of the cover plate portion 311 facing the rigid insulating tube 10. The positioning portion 322 extends axially from the fixing portion 321 and passes through the mounting hole 3111. The boss 323 extends axially from the fixing portion 321 in a direction away from the positioning portion 322. The positioning terminal 32 is pre-positioned by inserting the positioning portion 322 into the mounting hole 3111 of the cap 31, which facilitates assembly. Further, the fixing portion 321 of the positioning terminal 32 abuts against the socket portion 312 of the cap 31, so as to prevent the positioning terminal 32 from shaking after pre-positioning.

[0058] Optionally, in an embodiment provided by the present application, the positioning member 30 has an installation channel 301 that axially penetrates through the positioning portion 322, the fixing portion 321, and the boss 323 in sequence. The fuse 40 is inserted through the installation channel 301 and fixedly connected to the positioning portion 322. In this way, the positioning portion 322 of the positioning terminal 32 is also used to position the fuse 40, which is beneficial to avoiding the shaking of the fuse 40 and facilitating the further welding of the fuse 40 and the positioning terminal 32. Further, in order to facilitate the insertion of the fuse 40, the positioning member 30 further has a guiding surface 302 on the side of the boss 323 facing the fuse 40. The guiding surface 302 gradually moves away from the fuse 40 along the axial direction towards the flexible insulating tube 20. Under the guiding action of the guiding surface 302, the fuse 40 can smoothly enter the installation channel 301 of the positioning terminal 32, reducing the assembly difficulty.

[0059] Optionally, in an embodiment provided by the present application, the guiding surface 302 extends from the boss 323 to the positioning portion 322, and the side of the guiding surface 302 away from the flexible insulating tube 20 is joined to the fuse 40 to form an exhaust groove. The positioning member 30 is further provided with an exhaust hole 3211 that penetrates through the fixing portion 321 and communicates with the exhaust groove and the installation hole 3111. The guiding surface 302 is also used to combine with the outer surface of the fuse 40 to form an exhaust groove. The structure is ingenious, and the formed exhaust path also has a guiding effect on the arc. When the arc contacts the inner wall of the melamine tube, various gases are obtained by the decomposition of the melamine tube, increasing the internal pressure of the fuse and also dispersing the arc. The exhaust groove can disperse the arc, avoiding the phenomenon of re-ignition due to the excessive concentration of the arc at the exhaust port.

[0060] Optionally, in an embodiment provided by the present application, the width of the positioning portion 322 of the positioning terminal 32 is smaller than the length of the installation hole 3111. That is to say, there is a gap directly between the positioning portion 322 of the positioning terminal 32 and the cover plate portion 311 of the cap 31, and the exhaust hole 3211 communicates with this gap. In this way, repeated drilling is avoided, and only the size of the installation hole 3111 needs to be determined, which facilitates processing. Further, the cover plate portion 311 blocks part of the exhaust hole 3211, so that the gas inside the fuse can be guided towards the positioning terminal 32 and the fuse 40. The positioning terminal 32 and the fuse 40, as metal parts, can absorb the arc overflowing from the exhaust port, reducing the risk of arc convergence and re-ignition at the exhaust port.

[0061] Optionally, since the thicknesses at both ends of the fuse 40 are relatively thin, in an embodiment provided by the present application, the positioning member 30 is a pair of lobes symmetrically arranged on both sides of the fuse 40 and welded to the fuse 40. This not only facilitates assembly but also ensures the production accuracy of the installation channel 301, which is beneficial to closely fitting the positioning terminal 32 and the fuse 40.

[0062] Please refer to Figure 2, specifically, the positioning member 30 is provided with a feed inlet, and the new energy combined fuse further includes a plugging member 60 sealed at the feed inlet. In this way, the arc extinguishing particles 50 can be produced as a separate process, which is conducive to realizing modular production. The arc extinguishing particles 50 can be selectively filled according to actual needs. Other structures of the fuse except the arc extinguishing particles 50 can be assembled into semi-finished products and sold separately, which is convenient for users to choose independently. During actual production, in order to ensure the arc extinguishing effect, the arc extinguishing particles 50 are made of quartz sand. Optionally, the plugging member 60 is a sand plugging nail and is riveted to the cover plate portion 311 of the cap 31, which is beneficial to improving the sealing performance of the fuse and preventing the quartz sand from leaking.

[0063] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0064] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A new energy combined fuse, characterized in that: include: Rigid insulating tube (10); A flexible insulating tube (20), wherein the flexible insulating tube (20) is accommodated in the rigid insulating tube (10); A pair of positioning members (30), the two positioning members (30) are respectively sleeved at two ends of the rigid insulating tube (10) in an interference fit, a boss (323) extending in the axial direction is provided in the positioning member (30), and the boss (323) is inserted in the flexible insulating tube (20) in an interference fit so that the flexible insulating tube (20) is fixed in the rigid insulating tube (10); a fuse (40), the fuse (40) being passed through the flexible insulating tube (20) and fixedly connected to the positioning member (30); and Arc extinguishing particles (50), the arc extinguishing particles (50) are filled in the flexible insulating tube (20) to wrap the fuse (40).

2. The new energy combined fuse according to claim 1, characterized in that: The difference between the inner diameter of the rigid insulating tube (10) and the outer diameter of the flexible insulating tube (20) is greater than 0 mm and less than or equal to 2 mm; and / or Both ends of the flexible insulating tube (20) abut against the inner wall of the rigid insulating tube (10); and / or The rigid insulating tube (10) is a ceramic tube, and the flexible insulating tube (20) is a melamine tube.

3. The new energy combined fuse according to claim 1 is characterized in that: The diameter of the boss (323) gradually decreases in the axial direction approaching the flexible insulating tube (20).

4. The new energy combined fuse according to any one of claims 1 to 3, characterized in that: The positioning member (30) comprises a cap (31) which is interference-fitted on the end of the rigid insulating tube (10) and a positioning terminal (32) which is fixedly connected inside the cap (31) and provides the boss (323).

5. The new energy combined fuse according to claim 4, characterized in that: The cap (31) comprises a cover plate portion (311) sealed on the rigid insulating tube (10) and provided with a mounting hole (3111), and a sleeve portion (312) extending axially from the cover plate portion (311), wherein the sleeve portion (312) abuts against the outer wall of the rigid insulating tube (10); The positioning terminal (32) comprises a fixing portion (321) fixedly connected to the side of the cover portion (311) facing the rigid insulating tube (10), a positioning portion (322) axially extending from the fixing portion (321) and penetrating through the mounting hole (3111), and a boss (323) axially extending from the fixing portion (321) in a direction away from the positioning portion (322).

6. The new energy combined fuse according to claim 5, characterized in that: The positioning member (30) has an installation channel (301) which sequentially passes through the positioning portion (322), the fixing portion (321) and the boss (323) along the axial direction; the fuse (40) is passed through the installation channel (301) and fixedly connected to the positioning portion (322).

7. The new energy combined fuse according to claim 6, characterized in that: The positioning member (30) further comprises a guide surface (302) located on a side of the installation channel (301) close to the flexible insulating tube (20), and the guide surface (302) gradually moves away from the fuse (40) in a direction axially close to the flexible insulating tube (20).

8. The new energy combined fuse according to claim 7, characterized in that: The guide surface (302) extends from the boss (323) to the positioning portion (322), and the side of the guide surface (302) away from the flexible insulating tube (20) is joined to the fuse (40) to form an exhaust groove, and the positioning member (30) is also provided with an exhaust hole (3211) that passes through the fixing portion (321) and is connected to the exhaust groove and the mounting hole (3111).

9. The new energy combined fuse according to claim 1, characterized in that: The positioning member (30) is a pair of petals symmetrically arranged on both sides of the fuse (40) and welded to the fuse (40).

10. The new energy combined fuse according to claim 1, characterized in that: The positioning member (30) is provided with a feed port, and the new energy combined fuse further comprises a blocking member (60) sealed at the feed port.

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