CN215771053U - Fuse and vehicle - Google Patents

Abstract

The utility model discloses a fuse and a vehicle, the fuse includes: a housing; the conductive piece is arranged in the shell and provided with at least one breakable part, and the breakable part is positioned in the shell; the driving piece is arranged on the shell; the driven piece is arranged in the shell and positioned between the driving piece and the conductive piece, and is suitable for moving towards the conductive piece under the driving action of the driving piece and breaking the breakable part; the first arc extinguishing medium is arranged in the shell and at least partially covers the conductive piece. The first arc-extinguishing medium is arranged above the conductive piece, so that when part of the conductive piece is broken, the first arc-extinguishing medium can flow to the lower part of the conductive piece from the broken part, and the first arc-extinguishing medium can extinguish the electric arc generated at the broken part. Moreover, because the arc-extinguishing fuse and the melt made of special materials are not needed, and the arc-extinguishing position is at the fracture, the product structure is simplified, and the light weight and the miniaturization are facilitated.

Description

Fuse and vehicle

Technical Field

The utility model relates to the technical field of power-off protection, in particular to a fuse and a vehicle.

Background

The intelligent fuse mainly comprises a detonator, a conductive bus bar and the like, wherein the detonator generates high-pressure gas after receiving a cutting instruction, and the conductive bus bar is cut by explosion, so that the aim of quickly cutting off a circuit is fulfilled. The technology that the conductive bus bar is broken by receiving an external signal through the detonator is a mature technology which is not a new technology by means of an air bag. In the process that the conductive busbar is broken, an electric arc can be generated at the fracture, and the electric arc must be extinguished as soon as possible to ensure the safety of the circuit.

At present, the arc extinguishing principle used by an intelligent fuse is mainly air arc extinguishing, parallel arc extinguishing, air-blast and magnetic-blast arc extinguishing, arc extinguishing grid arc extinguishing and the like, the advantages of the arc extinguishing modes are thousands of years, the defects are different, and the arc extinguishing mode mainly focuses on aspects of insufficient arc extinguishing capacity, insufficient breaking capacity, limited current impact resistant life (such as a scheme of serially connecting melts, limited impact resistant life of melts), large volume, complex production process, high cost, incapability of zero current cutting and the like.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a fuse, wherein a first arc-extinguishing medium is arranged above a conductive piece, so that an electric arc generated at a fracture is immediately extinguished by the first arc-extinguishing medium filled around.

The utility model also provides a vehicle.

A fuse according to an embodiment of the first aspect of the present invention includes: a housing; the conductive piece is arranged in the shell, and is provided with at least one breakable part which is positioned in the shell; the driving piece is arranged on the shell; the driven part is arranged in the shell and positioned between the driving part and the conductive part, and is suitable for moving towards the conductive part and breaking the easy-breaking part under the driving action of the driving part; a first arc-extinguishing medium disposed within the housing and at least partially covering over the conductive member.

According to the fuse provided by the embodiment of the utility model, the first arc-extinguishing medium is arranged above the conductive piece, so that when part of the conductive piece is broken, the first arc-extinguishing medium can flow to the lower part of the conductive piece from the broken part, and in the process, the first arc-extinguishing medium can extinguish the arc generated at the broken part. Moreover, because the arc-extinguishing fuse and the melt made of special materials are not needed, and the arc-extinguishing position is at the fracture, the product structure is simplified, and the light weight and the miniaturization are facilitated.

According to some embodiments of the utility model, the driving member is an initiator and the driven member is a piston which, upon detonation of the initiator, moves towards the conductive member and breaks the frangible portion under the detonating force of the initiator.

According to some embodiments of the utility model, the first arc-extinguishing medium at least partially covers both sides of the conductive member in the width direction.

According to some embodiments of the utility model, further comprising: the transmission piece is arranged between the driven piece and the conductive piece, the first arc extinguishing medium is positioned around the transmission piece, the top end of the transmission piece protrudes out of the first arc extinguishing medium, and the top end of the transmission piece and the driven piece are arranged at intervals.

According to some embodiments of the utility model, the transmission member is an insulating member.

According to some embodiments of the utility model, the follower comprises: the first arc extinguishing medium is positioned around the piston transmission piece.

According to some embodiments of the utility model, further comprising: and the second arc extinguishing medium is arranged in the shell and is positioned below the conductive piece.

According to some embodiments of the utility model, the housing comprises: the driving piece is arranged in the first shell, the driven piece and the first arc extinguishing medium are arranged in the first shell, the conductive piece is clamped between the first shell and the second shell, a falling object opening opposite to the easy-breaking portion of the conductive piece is arranged on the second shell, and the second arc extinguishing medium is arranged in the second shell.

According to some embodiments of the utility model, the second housing comprises: the conductive piece is arranged on the mounting seat, the base is arranged on one side, away from the first shell, of the mounting seat, and the second arc-extinguishing medium is arranged in the base.

According to some embodiments of the utility model, a partition layer is disposed on the second housing, the first arc-extinguishing medium is disposed above the partition layer, the falling object opening is disposed on the partition layer, and the conductive member closes the falling object opening when the breakable portion of the conductive member is not broken by the impact.

According to some embodiments of the present invention, the breakable part includes a groove penetrating the conductive member in a width direction of the conductive member, and the second housing is provided with a stopper closing an end of the groove.

According to some embodiments of the utility model, the conductive member comprises: input section, output section and linkage segment, the linkage segment set up in the input section with between the output section and be located the casing, the linkage segment is provided with two easy-to-break portion, the lower extreme of charging is in the projection of linkage segment is located two between the easy-to-break portion.

According to some embodiments of the utility model, the lower end of the follower is at the same distance in projection of the connecting section to both of the frangible portions.

According to some embodiments of the utility model, two of the frangible portions are different in shape and are respectively disposed on the upper and lower surfaces of two connecting sections, and the lower end of the follower is disposed adjacent to one of the frangible portions in a projection of the connecting sections.

A vehicle according to an embodiment of a second aspect of the utility model includes the fuse according to the above-described embodiment.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a fuse according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a conductive member and a housing according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the fuse after concealing the detonator, the first housing and the piston;

FIG. 4 is a cross-sectional view of a fuse according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of another angle of a fuse in accordance with an embodiment one of the present invention;

FIG. 6 is a cross-sectional view of a fuse according to a first embodiment of the present invention after disconnection;

fig. 7 is a sectional view of a fuse according to a second embodiment of the present invention;

fig. 8 is a sectional view of a fuse according to the second embodiment of the present invention after disconnection.

Reference numerals:

100. a fuse;

10. a housing; 11. a first housing; 12. a second housing; 13. opening the falling object; 14. a baffle plate; 15. a mounting seat; 16. a base; 17. a partition layer;

20. a conductive member; 21. a transmission member; 22. an input section; 23. an output section; 24. a connecting section; 25. a breakable portion;

30. a piston; 31. a piston head; 32. a piston drive member;

41. an initiator; 42. a first arc-extinguishing medium; 43. a second arc quenching medium.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

The fuse 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 8, and the present invention also proposes a vehicle having the fuse 100 described above.

As shown in fig. 1 to 8, a fuse 100 according to an embodiment of the present invention includes: the arc extinguishing device comprises a shell 10, a conductive piece 20, a driving piece, a driven piece and a first arc extinguishing medium 42, wherein the conductive piece 20 is arranged in the shell 10, at least one breakable part 25 is arranged on the conductive piece 20, the breakable part 25 is arranged in the shell, the driving piece is arranged in the shell 10, the driven piece is arranged in the shell 10 and is positioned between the driving piece and the conductive piece 20, after the driving piece is detonated, the driven piece is suitable for moving towards the conductive piece 20 under the driving action of the driving piece and breaking the breakable part 25, the first arc extinguishing medium 42 is arranged in the shell 10, and the first arc extinguishing medium 42 covers the conductive piece 20.

When the vehicle is in a normal operating state, the central control system does not send an excitation signal to the driving element, so that the driving element is in a standby state, and at the moment, the current of the current loop flows in from one end of the conductive element 20 and flows out from the other end. That is, the fuse 100 acts as a conductor with almost negligible resistance and only plays a role of transmitting electric energy in a current loop.

When abnormal current occurs in a current loop of the vehicle, for example, faults such as short circuit occur, the central control system sends an excitation signal to the driving part, and the driving part drives the driven part to overcome the limiting device to move downwards after receiving the excitation signal. The driven member moves downwards to promote the conductive member 20 to break from the weak easy-to-break part 25, an electric arc is generated at the broken part of the conductive member 20 at the moment when the conductive member 20 is broken, the broken part of the conductive member 20 separates the left side and the right side of the broken part of the conductive member 20 in the process of being pushed downwards by the driven member, the generated electric arc is lengthened, the arc resistance is increased, in addition, as the peripheral side surface and the upper surface of the broken part of the conductive member 20 are covered with a large amount of first arc-extinguishing mediums 42, the first arc-extinguishing mediums 42 fall down along with the broken part of the conductive member 20, the electric arc generated at the broken part of the conductive member 42 is torn into countless fragments in the process of the electric arc, the electric arc is absorbed, the electric arc is rapidly extinguished, the current loop of the vehicle is thoroughly cut off, and the protection of the system circuit of the vehicle is completed.

Or, when there is no current (I ═ 0) or the current is small in the high-voltage circuit of the vehicle, but the central control system detects and determines that the risk level of the vehicle reaches the preset value of the system, for example, the vehicle is exposed to insolation, water soaking or collision, the central control system also sends a cut-off command to the driving member to break the conductive member 20. In this case, since no current or a small current flows through the conductive member 20, the conductive member 20 does not generate an arc or generates a small arc during the disconnection process, and thus, arc extinction is not required.

Moreover, since the cross section of the conductive member 20 is large, the existence of the breakable portion 25 has almost no influence on the conductivity and temperature rise of the conductive member 20, and is insensitive to the overload shock of the current loop, so that the fuse 100 has strong current shock resistance and long service life. In addition, since the cross section of the conductive member 20 is large, the resistance of the conductive member 20 is small, and thus the fuse 100 generates low heat, increases temperature little, and consumes low power.

Also, the first arc-extinguishing medium 42 may be a powdered solid, such as quartz sand, or the first arc-extinguishing medium 42 may be a paste, such as high-voltage cable insulation silicone grease, or a filler such as a gas. Preferably, the first arc-extinguishing medium 42 is made of powdered quartz sand. And, in order to protect the housing 10 and the driven member, the housing 10 and the driven member may be made of any suitable high temperature resistant electrically insulating material.

In addition, the fuse 100 does not need to use a melt made of a special material, and has a simple structure and process, a small volume, and a light weight, so that the cost of the fuse 100 can be reduced.

Thus, the first arc-extinguishing medium 42 is disposed above the conductive member 20, so that when a portion of the conductive member 20 is broken, the first arc-extinguishing medium 42 can flow from the broken portion to below the conductive member 20, and in the process, the first arc-extinguishing medium 42 can extinguish the arc generated at the broken portion. Moreover, because the arc-extinguishing fuse and the melt made of special materials are not needed, the cost can be reduced, and the arc-extinguishing position is at the fracture, the product structure is simplified, and the light weight and the miniaturization are facilitated.

According to some alternative embodiments of the present invention, the driving member may be an initiator 41, the driven member may be a piston 30, the initiator 41 may be a micro pneumatic device, which may receive an activation signal from the central control system, and the initiator 41 may release high pressure gas upon receiving the activation signal, thereby driving the driven member to overcome the limiting device and move down rapidly, thereby breaking the frangible portion 25. In other embodiments, the driving member may also be a motor-driven structure, a hydraulic-driven structure, etc., and the driven member may also be a push rod structure, a lead screw structure, etc., which may all achieve that the driving member drives the driven member to break the frangible portion 25.

Wherein the first arc-extinguishing medium 42 at least partially covers both sides of the conductive member 20 in the width direction. So set up for conductive piece 20 can all be covered by first arc extinguishing medium 42 in width direction's both sides to can guarantee that easy-to-break portion 25 is when being broken by the dashing, easy-to-break portion 25 both sides also can be covered by first arc extinguishing medium 42, thereby can promote conductive piece 20 arc extinguishing efficiency.

According to an alternative embodiment of the present invention, as shown in fig. 4 and 6, the fuse 100 further includes: the driving member 21, the driving member 21 disposed between the piston 30 and the conductive member 20, and the driving member 21 and the piston 30 are disposed at an interval, the first arc-extinguishing medium 42 is disposed around the driving member 21, and the top end of the driving member 21 protrudes from the first arc-extinguishing medium 42, and the top end of the driving member 21 and the driven member are disposed at an interval. So, follower downstream's in-process can strike transmission piece 21, and push down transmission piece 21 is quick, make conductive piece 20 break from easy-to-break portion 25, in the twinkling of an eye of conductive piece 20 disconnection, the fracture department of conductive piece 20 will produce electric arc, because transmission piece 21 itself is electrical insulation material, have the effect of blocking to electric arc, consequently transmission piece 21 is by piston 30 in-process down promotion, separate both sides about the fracture, and stretch the electric arc that will produce, make arc resistance increase, thereby make the arc extinguishing. It should be noted that, after the conductive member 20 is broken, the transmission member 21 and the broken conductive member 20 are an integral body, and during the process of being pushed down rapidly by the piston 30, the transmission member 21 and the first arc-extinguishing medium 42 around the break are pressed by the transmission member 21 and fall down along with the transmission member 21 and the broken conductive member 20. At this time, no matter the motion of the transmission member 21 or the passive movement of the surrounding arc-extinguishing medium, the arc is disturbed and torn, and the extinguishing of the arc is accelerated.

Moreover, since the conductive member 20 is broken by the piston 30 driven by the detonator 41, not only is the speed high, but also the transmission member 21 is rapidly filled in the fracture of the conductive member 20 in the process that the piston 30 breaks the conductive member 20, and the transmission member 21 is an insulating member made of an electrically insulating material, so that the electric arc is blocked, the generation of the electric arc at the fracture is avoided, and the arc extinguishing effect can be improved.

In addition, as shown in fig. 3 to 8, the top end of the transmission member 21 protrudes from the first arc-extinguishing medium 42, so that when the piston 30 moves towards the conductive member 20, the piston 30 can directly abut against the transmission member 21 without colliding with the first arc-extinguishing medium 42, i.e., the piston 30 can transmit the impact force to the transmission member 21. At this time, the driving member 21 is fixedly connected to the conductive member 20, and the driving member 21 may be integrated with the conductive member 20 by assembling, injection molding, or riveting.

According to another alternative embodiment of the present invention, as shown in fig. 7 and 8, the driven member includes: the arc extinguishing device comprises a piston head 31 and a piston transmission piece 32, wherein the piston transmission piece 32 is connected to the bottom of the piston head 31, the piston head 31 is arranged opposite to a driving piece, and a first arc extinguishing medium 42 is arranged around the piston transmission piece 32. That is, the side of the piston 30 facing the conductive member 20 is provided with a piston transmission member 32, and one end of the piston transmission member 32 away from the piston head 31 abuts against the conductive member 20, so that after the detonator 41 is detonated, the piston 30 is pushed to move towards the conductive member 20, and because one end of the piston transmission member 32 abuts against the conductive member 20, part of the conductive member 20 can be broken, and the current circuit can be disconnected. Furthermore, the first arc-extinguishing medium 42 is located on the circumferential side of the piston driver 32, so that the arc can be easily extinguished.

Also, during the process of the piston 30 breaking the conductive member 20, the piston driving member 32 is rapidly filled in the break of the conductive member 20, and since the piston driving member 32 itself is an electrically insulating material, it has a function of blocking the arc, and avoids the arc from being generated again at the break.

As shown in fig. 4 to 8, the fuse 100 further includes: a second arc-extinguishing medium 43, the second arc-extinguishing medium 43 being disposed in the housing 10, and the second arc-extinguishing medium 43 being located below the conductive member 20. That is, a certain amount of the second arc-extinguishing medium 43 is contained under the conductive member 20, and the second arc-extinguishing medium 43 may be the same material as the first arc-extinguishing medium 42, and both are disposed at different positions inside the fuse 100. The second arc-extinguishing medium 43 can not only protect the housing 10 from being burned by the broken conductive member 20 falling to the bottom of the housing 10, but also help the broken conductive member 20 to quickly extinguish the arc. In addition, the second arc-extinguishing medium 43 can play a role of buffering when the rapidly moving piston 30 pushes the broken conductive member 20 to move downward, so as to avoid impact damage to the housing 10.

Referring to fig. 4 to 8, the housing 10 includes: the arc extinguishing device comprises a first shell 11 and a second shell 12, a driving piece is arranged in the first shell 11, a driven piece and a first arc extinguishing medium 42 are arranged in the first shell 11, a conductive piece 20 is clamped between the first shell 11 and the second shell 12, a falling object opening 13 opposite to a breakable part 25 of the conductive piece 20 is arranged on the second shell 12, and a second arc extinguishing medium 43 is arranged in a base 16. That is, the piston 30 is movably disposed on the first housing 11, and the detonator 41 is disposed on the first housing 11 such that the detonator 41 generates a large amount of gas when the detonator 41 is activated, thereby pushing the piston 30 to move toward the conductive member 20, and the first arc-extinguishing medium 42 is disposed between the piston 30 and the conductive member 20 such that the first arc-extinguishing medium 42 falls toward the second housing 12 and the base 16 by gravity when the broken conductive member 20 falls into the base 16, thereby extinguishing an arc.

Also, as shown in fig. 4 and 5, the second housing 12 is provided with the drop opening 13 opposite to the break-away portion 25, so that when the break-away portion 25 is broken, the broken portion of the conductive member 20 may drop into the second housing 12 through the drop opening 13, thereby facilitating arc extinguishing of the conductive member 20.

As shown in fig. 4 to 8, the second housing 12 includes: a mounting seat 15 and a base 16, wherein the conductive member 20 is disposed on the mounting seat 15, the base 16 is disposed on a side of the mounting seat 15 away from the first housing 11, and the second arc-extinguishing medium 43 is disposed in the base 16. So set up, set up mount pad 15 and base 16 equipment through the components of a whole that can function independently and form second casing 12, mount pad 15 and base 16 production are convenient, the demolding of being convenient for to can promote the production efficiency of second casing 12.

In addition, as shown in fig. 5, the second housing 12 is provided with a blocking layer 17, the first arc-extinguishing medium 42 is disposed above the blocking layer 17, the falling object opening 13 is disposed on the blocking layer 17, and the conductive member 20 closes the falling object opening 13 when the breakable portion 25 of the conductive member 20 is not broken by the impact. That is, the first housing 11 and the second housing 12 can be separated by the partition layer 17, and the falling object opening 13 can be shielded by the conductive member 20, so that the first arc-extinguishing medium 42 can be contained in the first housing 11. Further, a blocking layer 17 may be provided on the mount 15.

Further, as shown in fig. 2, the breakable part 25 includes a groove penetrating the conductive member 20 in the width direction of the conductive member, and the second housing 12 is provided with a baffle 14, the baffle 14 closing an end of the groove. That is, the baffle 14 is disposed at a position of the second housing 12 facing the frangible portion 25, and the baffle 14 can ensure that the first arc-extinguishing medium 42 does not fall from the frangible portion 25 into the base 16. Further, the groove may be provided at an upper portion of the conductive member 20, at a lower portion of the conductive member 20, or at both the upper portion and the lower portion of the conductive member 20. Further, the baffle 14 may be provided on the partition layer 17.

Referring to fig. 4 to 8, the conductive member 20 includes: the input section 22, output section 23 and connecting section 24, connecting section 24 sets up between input section 22 and output section 23 to be located the casing 10, and connecting section 24 is provided with two easy-break portions 25, and the lower extreme of driving medium is located between two easy-break portions 25 at the projection of connecting section 24. That is, the input section 22 and the output section 23 of the conductive member 20 are respectively connected to the circuit of the battery pack, and the current can be input into the fuse 100 from the input section 22, and then output from the output section 23 after passing through the connection section 24. The arrangement is that the breakable part 25 is arranged between the input section 22 and the connecting section 24, and the breakable part 25 is also arranged between the output section 23 and the connecting section 24, so that when the conductive member 20 is impacted by the piston 30, the connecting section 24 can be broken and separated from the input section 22 or the output section 23 to form a fracture, and thus the fuse 100 can break a current loop to complete the protection of the vehicle.

According to an alternative embodiment of the utility model, the lower end of the piston 30 is at the same distance in projection of the connecting section 24 to the two frangible portions 25. That is, when the piston 30 impacts the connecting section 24, the impact force applied to the two breakable portions 25 is equal, so that both the breakable portions 25 can be broken, and the connecting section 24 falls into the base 16 along with the piston 30 as a whole, thereby facilitating arc extinguishing of the connecting section 24. Moreover, two breakable portions 25 are disposed on the side of the conductive member 20 facing the base 16, so as to facilitate the separation of the connecting section 24 from the input section 22 and the output section 23. Furthermore, the first arc-extinguishing medium 42 falls into the base 16 from the interruption between the input section 22 and the connecting section 24 and from the interruption between the output section 23 and the connecting section 24 into the base 16, so that the arcs occurring between the connecting section 24 and the input section 22 and the output section 23 can both be extinguished by the first arc-extinguishing medium 42.

According to another alternative embodiment of the present invention, the two frangible portions 25 are different in shape, and the two frangible portions 25 are respectively provided on the upper and lower surfaces of the two connecting sections 24, and the lower end of the piston 30 is provided adjacent to one frangible portion 25 in the projection of the connecting section 24. That is, when the piston 30 impacts the connecting section 24, the two breakable parts 25 are subjected to different impact forces, and the lower end of the piston 30 is subjected to a larger impact force at one breakable part 25 adjacent to the projection of the connecting section 24, so that the breakable part 25 is broken first, and then the connecting section 24 moves downward around the other breakable part 25, and the other breakable part 25 is not broken. Thus, the first arc-extinguishing medium 42 can fall into the base 16 from the break formed at one of the frangible portions 25, and the other frangible portion 25 is always covered by the first arc-extinguishing medium 42, so that the arc can be extinguished by the first arc-extinguishing medium 42.

The conductive member 20 may be a conductive copper bar, and the breakable portion 25 is a notch. And, the conductive element 20 is usually a conductive copper bar, but the conductive element 20 may also be other conductive conductors with excellent conductivity, such as a conductive aluminum bar. Also, the breakable part 25 is a notch provided to weaken the strength of the conductive member 20 at this location, so that the conductive member 20 is more easily broken by the impact of the piston 30, i.e., to facilitate the separation of the connecting section 24 from the input section 22 and/or the output section 23. Specifically, the notch extends through the width direction of the conductive member 20, and the shape of the notch may be a V-shaped structure, a U-shaped structure, or a combination of U, V notches, or other shapes that facilitate disconnection, such as reduced thickness.

A vehicle according to an embodiment of the second aspect of the utility model includes the fuse 100 according to the above-described embodiment.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (15)

1. A fuse, comprising:

a housing;

the conductive piece is arranged in the shell, and is provided with at least one breakable part which is positioned in the shell;

the driving piece is arranged on the shell;

the driven part is arranged in the shell and positioned between the driving part and the conductive part, and is suitable for moving towards the conductive part and breaking the easy-breaking part under the driving action of the driving part;

a first arc-extinguishing medium disposed within the housing and at least partially covering over the conductive member.

2. The fuse of claim 1, wherein the driving member is an initiator and the driven member is a piston, and after the initiator is initiated, the piston moves toward the conductive member under the action of the initiating force of the initiator and breaks the breakable portion.

3. The fuse of claim 1, wherein the first arc-quenching medium at least partially covers both sides of the conductive member in a width direction.

4. The fuse of claim 1, further comprising: the transmission piece is arranged between the driven piece and the conductive piece, the first arc extinguishing medium is positioned around the transmission piece, the top end of the transmission piece protrudes out of the first arc extinguishing medium, and the top end of the transmission piece and the driven piece are arranged at intervals.

5. The fuse of claim 4, wherein the transmission member is an insulating member.

6. The fuse of claim 1, wherein the follower comprises: the first arc extinguishing medium is positioned around the piston transmission piece.

7. The fuse of claim 1, further comprising: and the second arc extinguishing medium is arranged in the shell and is positioned below the conductive piece.

8. The fuse of claim 7, wherein the housing comprises: the driving piece is arranged in the first shell, the driven piece and the first arc extinguishing medium are arranged in the first shell, the conductive piece is clamped between the first shell and the second shell, a falling object opening opposite to the easy-breaking portion of the conductive piece is arranged on the second shell, and the second arc extinguishing medium is arranged in the second shell.

9. The fuse of claim 8, wherein the second housing comprises: the conductive piece is arranged on the mounting seat, the base is arranged on one side, away from the first shell, of the mounting seat, and the second arc-extinguishing medium is arranged in the base.

10. The fuse of claim 8, wherein the second housing defines a partition layer, the first arc quenching medium is disposed above the partition layer, the drop opening is disposed in the partition layer, and the conductive member closes the drop opening when the breakable portion of the conductive member is not broken.

11. The fuse as claimed in claim 8, wherein the breakable portion includes a groove penetrating the conductive member in a width direction of the conductive member, and a shutter is provided on the second housing, the shutter closing an end of the groove.

12. The fuse of claim 1, wherein the conductive member comprises: input section, output section and linkage segment, the linkage segment set up in the input section with between the output section and be located the casing, the linkage segment is provided with two easy-to-break portion, the lower extreme of follower is in the projection of linkage segment is located two between the easy-to-break portion.

13. A fuse as per claim 12, characterised in that the lower end of the follower is at the same distance in projection of the connecting section to both said frangible portions.

14. A fuse as per claim 12, characterised in that the two said frangible portions are shaped differently and are provided on the upper and lower surfaces of the two connecting sections, respectively, the lower end of the follower being provided adjacent to one of said frangible portions in the projection of the connecting section.

15. A vehicle characterized by comprising the fuse according to any one of claims 1 to 14.

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