CN220232958U - Fuse, fusing structure and vehicle - Google Patents

Abstract

The application provides a fuse, a fusing structure and a vehicle. The fuse comprises a shell, a conductive part, a cutting part, a first gas generator and a second gas generator, wherein the shell is provided with an accommodating space, the conductive part is arranged in the accommodating space and is electrically connected with the main circuit, the cutting part is arranged in the accommodating space and is movably connected with the shell, and the first gas generator is arranged on one side of the cutting part, which is away from the conductive part, and is electrically connected with the main circuit, so that when the current of the main circuit is large, the first gas generator can explode and push the cutting part to cut off the conductive part, and the passive triggering is realized; the second gas generator is arranged on one side of the cutting piece, which is away from the conductive piece, and is electrically connected with the external trigger interface, so that the second gas can be controlled to explode and push the cutting piece to cut off the conductive piece through the external trigger interface, active trigger is realized, in the process, active and passive trigger is realized by adopting different gas generators, false trigger can be avoided, and the reliability is higher.

Description

Fuse, fusing structure and vehicle

Technical Field

The present disclosure relates to the technical field of electrical equipment, and in particular, to a fuse, a fusing structure, and a vehicle.

Background

The fuse is widely applied to the aspects of high-low voltage distribution systems, control systems, electric equipment and the like as a protector for short circuit and overcurrent.

For the conventional fuse, since the conventional fuse is continuously impacted by the peak current, the service life of the conventional fuse is generally short, and in order to improve the service life, the impact resistance of the conventional fuse can be improved by using the fuse with higher rated current, but the conventional fuse has poor short-circuit protection performance, that is, the conventional fuse has difficult to have both good impact resistance and short-circuit protection performance.

At present, in order to enable the fuse to have better shock resistance and short-circuit protection performance, the fuse integrating active triggering and passive triggering is arranged, the shock resistance of the fuse can be improved by setting higher rated current in the fuse, and meanwhile, the fuse can be fused through active triggering, so that the fuse is guaranteed to have better short-circuit protection performance. However, in the conventional active-passive integrated fuse, since the active trigger interface and the passive trigger circuit are electrically connected to one gas generator, electrical insulation between the active trigger interface and the passive trigger circuit is difficult to ensure, and a situation of false touch is easy to occur, so that the operation of the user equipment is stopped, and the reliability is low.

Disclosure of Invention

The embodiment of the application provides a fuse, a fusing structure and a vehicle, which can reduce the possibility of false touch and improve the reliability of equipment while realizing active triggering and passive triggering.

In one aspect, the present application provides a fuse comprising a housing, a conductive member, a cutting member, a first gas generator, and a second gas generator, the housing forming an accommodation space; the conductive piece is arranged in the accommodating space and is used for being electrically connected with a main circuit of the device to be protected; the cutting piece is arranged in the accommodating space and is movably connected with the shell; the first gas generator is arranged on one side of the cutting piece, which is away from the conductive piece, and is used for being electrically connected with the main circuit, and the first gas generator is used for igniting and exploding and increasing the air pressure when the current of the main circuit is greater than or equal to a threshold value so as to push the cutting piece to cut the conductive piece; the second gas generator is arranged on one side of the cutting piece, which is away from the conductive piece, and is electrically connected with the external trigger interface, and the second gas generator is used for igniting and exploding under the control of the external trigger interface and increasing the air pressure so as to push the cutting piece to cut the conductive piece.

According to one aspect of the present application, the conductive member is formed with a weak portion, and the weak portion partially overlaps the cutting member in the cutting direction.

According to one aspect of the application, the fuse further comprises an arc extinguishing member connected in parallel to the conductive member, and the weak point is located between two ends of the conductive member connected to the arc extinguishing member.

According to one aspect of the present application, the fuse further comprises an arc extinguishing medium disposed in the accommodation space, the arc extinguishing medium coating the arc extinguishing member.

According to an aspect of the application, the cutting member includes connecting body, flange and sets up in the cutting portion of connecting body towards one side of electrically conductive piece, and the flange sets up in one side that connecting body deviates from electrically conductive piece, and the periphery of flange is laminated with the lateral wall of shell orientation accommodation space, and connecting body passes through flange swing joint in the shell.

According to one aspect of the application, the cutting member further comprises a sealing ring sleeved on the periphery of the flange, and the flange is attached to the housing through the sealing ring.

On the other hand, the application also provides a fusing structure, which comprises a melt and the fuse, wherein the melt is arranged between a conductive part of the fuse and a main circuit of equipment to be protected, and a first gas generator of the fuse is connected in parallel to two sides of the melt.

According to one aspect of the application, the fusing structure further comprises a filter connected in series with the first gas generator, an end of the filter remote from the first gas generator being electrically connected to an end of the melt facing away from the conductive member.

According to one aspect of the present application, the fuse structure further includes a differential pressure detector electrically connected to the second gas generator of the fuse.

In yet another aspect, the present application also provides a vehicle comprising a fuse structure as defined in any one of the above.

In the fuse, the fusing structure and the vehicle, the fuse comprises a shell, a conductive part, a cutting part, a first gas generator and a second gas generator, wherein an accommodating space is formed in the shell, the conductive part is arranged in the accommodating space and is used for being electrically connected with a main circuit, the cutting part is arranged in the accommodating space and is movably connected with the shell, and the first gas generator is arranged on one side of the cutting part, which is away from the conductive part, and is used for being electrically connected with the main circuit, so that when the current of the main circuit is larger, the first gas generator can ignite and explode and increase the air pressure around the first gas generator, and the cutting part is pushed to cut off the conductive part, so that the passive triggering of the fuse is realized; and because the second gas generator is arranged on one side of the cutting piece, which is away from the conductive piece, and is electrically connected with the external trigger interface, the second gas can be directly controlled to generate ignition explosion and increase the surrounding air pressure through the external trigger interface, the cutting piece is pushed to cut off the conductive piece, the active trigger of the fuse is realized, and in the process, the main circuit and the external trigger interface are connected to different gas generators, so that the insulation problem of the main circuit and the external trigger interface is not needed to be considered, the situation that equipment stops running due to false touch can be avoided, and the reliability is higher.

Drawings

FIG. 1 is a schematic diagram of a fuse provided in some embodiments of the present application;

FIG. 2 is another schematic structural view of a fuse provided in some embodiments of the present application;

FIG. 3 is a schematic illustration of a fuse structure provided in some embodiments of the present application;

reference numerals illustrate:

a housing 100; a conductive member 101; a cutter 102; a first gas generator 103; a second gas generator 104; an accommodation space 105; a weakened portion 106; an arc extinguishing member 107; a connection body 108; a cutting section 109; a melt 110; a filter 111; a differential pressure detector 112.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.

Fig. 1 is a schematic structural diagram of a fuse provided in some embodiments of the present application.

As shown in fig. 1, in one aspect, the present application provides a fuse including a housing 100, a conductive member 101, a cutting member 102, a first gas generator 103, and a second gas generator 104, the housing 100 being formed with an accommodation space 105; the conductive element 101 is disposed in the accommodating space 105 and is used for electrically connecting with a main circuit of the device to be protected; the cutting member 102 is disposed in the accommodating space 105 and movably connected to the housing 100; the first gas generator 103 is arranged on one side of the cutting member 102, which is away from the conductive member 101, the first gas generator 103 is used for being electrically connected with the main circuit, and the first gas generator 103 is used for igniting and exploding and increasing the air pressure when the current of the main circuit is greater than or equal to a threshold value so as to push the cutting member 102 to cut the conductive member 101; the second gas generator 104 is disposed on a side of the cutting member 102 away from the conductive member 101, the second gas generator 104 is electrically connected with the external trigger interface, and the second gas generator 104 is used for igniting and exploding under the control of the external trigger interface and increasing the air pressure so as to push the cutting member 102 to cut the conductive member 101.

The housing 100 is used for supporting and accommodating various internal elements of the fuse, an accommodating space 105 is formed inside the housing 100 for accommodating the conductive member 101, the cutting member 102, the first gas generator 103 and the second gas generator 104, and an opening communicating with the accommodating space 105 may be formed in the housing 100 for passing through connection conductors of the first gas generator 103 and the second gas generator 104.

The conductive members 101 are used for electrically connecting with a main circuit of the device to be protected to conduct current on the main circuit, and specifically, both ends of the conductive members 101 may extend to the outside of the housing 100, respectively, and be connected to the main circuit of the device to be protected, respectively, for example, the conductive members 101 may be connected in series to an upstream end of a relay of the main circuit.

The cutting member 102 is used for cutting the conductive member 101; the first gas generator 103 is used for igniting and exploding after the current of the main circuit reaches a rated threshold value and generating certain gas so as to increase the air pressure around the first gas generator 103, and because the first gas generator 103 is arranged on one side of the cutting member 102, which is away from the conductive member 101, when the air pressure around the first gas generator 103 is increased, the cutting member 102 can be pushed to move towards the direction close to the conductive member 101 so as to finally cut the conductive member 101; the second gas generator 104 is configured to receive a trigger instruction sent by an operator or an external device through an external trigger interface, and then ignite and explode and generate a certain gas, so as to increase the air pressure around the second gas generator 104, and because the second gas generator 104 is disposed on the side of the cutting member 102 away from the conductive member 101, when the air pressure around the second gas generator 104 increases, the cutting member 102 can be pushed to move towards a direction close to the conductive member 101, so as to cut the conductive member 101.

In the fuse, the fusing structure and the vehicle provided by the application, the fuse comprises a shell 100, a conductive element 101, a cutting element 102, a first gas generator 103 and a second gas generator 104, wherein the shell 100 is provided with an accommodating space 105, the conductive element 101 is arranged in the accommodating space 105 and is used for being electrically connected with a main circuit, the cutting element 102 is arranged in the accommodating space 105 and is movably connected with the shell 100, and the first gas generator 103 is arranged at one side of the cutting element 102, which is far away from the conductive element 101, and is used for being electrically connected with the main circuit of a device to be protected, so that when the current of the main circuit is larger, the first gas generator 103 can ignite and explode and increase the air pressure around the first gas generator, and the cutting element 102 is pushed to cut off the conductive element 101, so that the passive triggering of the fuse is realized; and, because the second gas generator 104 is arranged at one side of the cutting member 102, which is away from the conductive member 101, and is used for being electrically connected with an external trigger interface, the second gas can be directly controlled to generate ignition explosion and increase the surrounding air pressure through the external trigger interface, the cutting member 102 is pushed to cut off the conductive member 101, the active triggering of the fuse is realized, and in the process, the main circuit and the external trigger interface are connected to different gas generators, so that the insulation problem of the main circuit and the external trigger interface is not needed to be considered, the situation that the equipment stops running due to the false triggering can be avoided, and the reliability is higher.

Optionally, the cutting member 102 is movably connected to the housing 100, specifically, the housing 100 may be sleeved on the circumference of the cutting member 102, where the cutting member 102 approximates a piston, and when the first gas generator 103 or the second gas generator 104 ignites and explodes and increases the air pressure around the first gas generator or the second gas generator, the cutting member 102 may be pushed to cut the conductive member 101; of course, the cutting member 102 may be connected to the housing 100 by other means, for example, by a sliding rod, a sliding rail, or the like, and is not specifically limited herein.

Alternatively, the conductive member 101 may be configured as a copper bridge, or the conductive member 101 may be formed in other shapes or made of other conductive metal materials, which is not limited herein.

With continued reference to fig. 1, in accordance with one aspect of the present application, the conductive member 101 is formed with a weakened portion 106, and the weakened portion 106 partially overlaps the cutting member 102 in the cutting direction.

The cutting direction may be a direction perpendicular to the extending direction of the conductive member 101, and the cutting member 102 is moved in the cutting direction by the pushing of the first gas generator 103 or the second gas generator 104 until the conductive member 101 is cut off; the weak portion 106 may be formed on the conductive member 101, specifically, may be a groove or a notch formed on the conductive member 101, or the weak portion 106 may be made of a conductive material with lower rigidity, where the rigidity of the weak portion 106 is smaller than that of the rest of the conductive member 101, and it is understood that the weak portion 106 only needs to be easier to cut relative to the rest of the conductive member 101, and its specific shape, material, etc. may be adjusted according to practical situations, and is not limited herein specifically.

In this embodiment, the weak portion 106 partially overlaps the cutting member 102 along the cutting direction, so that the cutting member 102 can cut the conductive member 101 at the weak portion 106 under the pushing of the first gas generator 103 or the second gas generator 104, so as to cut off the conductive member 101, and realize the power failure of the device to be protected.

Fig. 2 is another schematic structural view of a fuse provided in some embodiments of the present application.

As shown in fig. 2, according to an aspect of the present application, the fuse further includes an arc extinguishing member 107, the arc extinguishing member 107 is connected to the conductive member 101 in parallel, and the weak portion 106 is located between both ends of the conductive member 101 where the arc extinguishing member 107 is connected.

The arc extinguishing member 107 may be an arc extinguishing copper wire, and of course, may be made of other materials; the arc extinguishing member 107 is used for extinguishing arc when the cutting member 102 cuts off the conductive member 101, specifically, the arc extinguishing member 107 is connected in parallel to the conductive member 101, and the weak portion 106 is located between two ends of the conductive member 101 connected with the arc extinguishing member 107, that is, one end of the arc extinguishing member 107 is electrically connected to one side of the weak portion 106, and the other end of the arc extinguishing member 107 is electrically connected to the other side of the weak portion 106.

It can be understood that when the current in the main circuit of the device to be protected is normal, the normal circulation of the current in the main circuit in the conductive member 101 is not affected because the resistance of the arc extinguishing member 107 is large; when the current of the main circuit is large, the conductive member 101 is cut off by the cutting member 102, and the current is conducted to the arc extinguishing member 107, and at this time, the arc extinguishing member 107 blows out the arc, thereby preventing the explosion of the fuse.

According to one aspect of the present application, the fuse further comprises an arc extinguishing medium disposed in the accommodation space 105, the arc extinguishing medium being disposed surrounding the arc extinguishing member 107.

The arc extinguishing medium can be solid medium such as quartz sand, gas medium such as sulfur hexafluoride and compressed air, and in practical application, the arc extinguishing medium can be determined according to practical conditions.

In this embodiment, the arc extinguishing medium is disposed to cover the arc extinguishing member 107, so that when the arc extinguishing member 107 blows out to extinguish the arc, the arc extinguishing medium can absorb the energy of the arc to further complete the arc extinguishing.

With continued reference to fig. 2, according to an aspect of the present application, the cutting member 102 includes a connecting body 108, a flange (not shown) and a cutting portion 109 disposed on a side of the connecting body 108 facing the conductive member 101, the flange is disposed on a side of the connecting body 108 facing away from the conductive member 101, an outer periphery of the flange is attached to a side wall of the housing 100 facing the accommodating space 105, and the connecting body 108 is movably connected to the housing 100 through the flange.

The connection body 108 is connected to the flange and the cutting portion 109, respectively, wherein the cutting portion 109 may be a cutting tool or may be a protrusion formed by protruding the connection body 108, and the conductive body is pressed by the protrusion to cut off the conductive body.

The flange is arranged at one side of the connecting body 108, which is away from the conductive element 101, the periphery of the flange is attached to the side wall of the housing 100, which faces the accommodating space 105, at this time, the housing 100 can be correspondingly sleeved on the periphery of the flange, the flange can be regarded as a piston installed in the accommodating space 105 of the housing 100, that is, the flange separates the accommodating space 105 into two relatively airtight first areas and second areas, wherein the conductive element 101, the connecting body 108 and the cutting part 109 are all positioned in the first areas, the first gas generator 103 and the second gas generator 104 are positioned in the second areas, when the first gas generator 103 or the second gas generator 104 acts and increases the gas pressure in the second areas, the flange can drive the connecting body 108 and the cutting part 109 to move under the pushing of the gas pressure, so that the cutting part 109 can cut the conductive element; it will be appreciated that the flange is more likely to move due to pressure changes than if the cutting member 102 is movably coupled to the housing 100 by a sliding mechanism such as a sliding rod or rail, thereby reducing the difficulty of the first gas generator 103 or the second gas generator 104 pushing the cutting member 102.

According to one aspect of the present application, the cutting member 102 further includes a sealing ring sleeved on the outer periphery of the flange, and the flange is attached to the housing 100 through the sealing ring.

In this embodiment, the cutting member 102 further includes a sealing ring sleeved on the outer periphery of the flange, where the flange is attached to the housing 100 by the sealing ring, at this time, the sealing ring is located between the side wall of the housing 100 facing the accommodating space 105 and the outer periphery of the flange, and the sealing ring can ensure the sealing performance between the first area and the second area separated by the flange, and meanwhile, the sealing ring can also prevent the flange from scratching the housing 100, so as to avoid damage to the flange and the housing 100 during the piston movement process of the flange.

Fig. 3 is a schematic structural view of a fusing structure provided in some embodiments of the present application.

As shown in fig. 3, in another aspect, the present application further provides a fusing structure, including a fuse 110 and a fuse as described in any one of the above, where the fuse 110 is disposed between a conductive element 101 of the fuse and a main circuit of a device to be protected, and a first gas generator 103 of the fuse is connected in parallel to two sides of the fuse 110.

The melt 110 is arranged between the conductive element 101 of the fuse and the main circuit of the equipment to be protected, the first gas generator 103 is connected in parallel to two sides of the melt 110, when the current of the main circuit is large, the melt 110 is fused, at the moment, the voltage of two ends of the melt 110 is increased, the current of the main circuit is conducted into the first gas generator 103, so that the first gas generator 103 ignites and explodes and generates certain gas to increase the air pressure around the first gas generator 103; it will be appreciated that the current threshold at which the first gas generator 103 is triggered may be determined according to the actual situation, and when the current conducted to the first gas generator 103 reaches the current threshold, the first gas generator 103 ignites and an explosion occurs.

Alternatively, the fusing structure may include an external trigger interface through which the second gas generator 104 of the fuse is electrically connected to an external control device, and when active triggering of the fuse is required, a current signal may be sent to the second gas generator 104 through the external control device to trigger the second gas generator 104 to ignite the explosion.

Alternatively, the external trigger interface may be a connection port on the external control device, and the second gas generator 104 is plugged into the external trigger interface through a wire to electrically connect with the external control device.

With continued reference to fig. 3, according to an aspect of the present application, the fusing structure further includes a filter 111, the filter 111 is connected in series with the first gas generator 103, and an end of the filter 111 away from the first gas generator 103 is electrically connected to an end of the melt 110 away from the conductive member 101.

The filter 111 is connected in series with the first gas generator 103, and an end of the filter 111 away from the first gas generator 103 is electrically connected to an end of the melt 110 away from the conductive member 101, so that the filter 111 can filter out other clutter signals in the circuit before the current of the main circuit is conducted to the first gas generator 103, and prevent the clutter signals from being disturbed.

Specifically, the threshold value of the filter 111 may be set, when the current of the main circuit is large, the melt 110 is fused, at this time, the voltage across the melt 110 increases, and when the voltage increases beyond the threshold value of the filter 111, the current is conducted to the first gas generator 103, causing the first gas generator 103 to ignite and explode and generate a certain gas to increase the air pressure around it.

With continued reference to fig. 3, in accordance with an aspect of the present application, the fusing structure further includes a differential pressure detector 112, the differential pressure detector 112 being electrically connected to the second gas generator 104 of the fuse.

In this embodiment, by connecting the differential pressure detector 112 to the second gas generator 104, the differential pressure in the second gas generator 104 is detected by the differential pressure detector 112, so that an operator can separate out whether the second gas generator 104 is damaged according to the differential pressure, so as to facilitate timely replacement, and avoid the influence on normal use due to the damage of the second gas generator 104 when the second gas generator 104 is required to be used.

In yet another aspect, the present application also provides a vehicle comprising a fuse structure as defined in any one of the above.

In the fuse, the fusing structure and the vehicle provided by the application, the fuse comprises a shell 100, a conductive element 101, a cutting element 102, a first gas generator 103 and a second gas generator 104, wherein the shell 100 is provided with an accommodating space 105, the conductive element 101 is arranged in the accommodating space 105 and is used for being electrically connected with a main circuit, the cutting element 102 is arranged in the accommodating space 105 and is movably connected with the shell 100, and the first gas generator 103 is arranged at one side of the cutting element 102, which is far away from the conductive element 101, and is used for being electrically connected with the main circuit of equipment to be protected, so that when the current of the main circuit is large, the first gas generator 103 can ignite and explode and increase the air pressure around the first gas generator, and the cutting element 102 is pushed to cut off the conductive element 101, so that the passive triggering of the fuse is realized; and, because the second gas generator 104 is arranged at one side of the cutting member 102, which is away from the conductive member 101, and is used for being electrically connected with an external trigger interface, the second gas can be directly controlled to generate ignition explosion and increase the surrounding air pressure through the external trigger interface, the cutting member 102 is pushed to cut off the conductive member 101, the active triggering of the fuse is realized, and in the process, the main circuit and the external trigger interface are connected to different gas generators, so that the insulation problem of the main circuit and the external trigger interface is not needed to be considered, the situation that the equipment stops running due to the false triggering can be avoided, and the reliability is higher.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Claims (10)

1. A fuse, characterized by comprising:

a housing formed with an accommodation space;

the conducting piece is arranged in the accommodating space and is used for being electrically connected with a main circuit of the device to be protected;

the cutting piece is arranged in the accommodating space and is movably connected with the shell;

the first gas generator is arranged on one side of the cutting piece, which is away from the conductive piece, and is used for being electrically connected with the main circuit, and the first gas generator is used for igniting and exploding and increasing the air pressure when the current of the main circuit is greater than or equal to a threshold value so as to push the cutting piece to cut the conductive piece;

the second gas generator is arranged on one side, away from the conductive piece, of the cutting piece and is used for being electrically connected with an external trigger interface, and the second gas generator is used for igniting explosion and increasing air pressure under the control of the external trigger interface so as to push the cutting piece to cut the conductive piece.

2. The fuse of claim 1, wherein the conductive member has a weak portion formed thereon, the weak portion partially overlapping the cutting member in a cutting direction.

3. The fuse of claim 2, further comprising an arc extinguishing member connected in parallel to the conductive member, the weak portion being located between ends of the conductive member connecting the arc extinguishing member.

4. A fuse as claimed in claim 3, further comprising an arc suppressing medium disposed in the receiving space, the arc suppressing medium surrounding the arc suppressing member arrangement.

5. The fuse of any one of claims 1-4, wherein the cutting member comprises a connecting body, a flange and a cutting portion disposed on a side of the connecting body facing the conductive member, the flange is disposed on a side of the connecting body facing away from the conductive member, an outer periphery of the flange is attached to a side wall of the housing facing the accommodating space, and the connecting body is movably connected to the housing through the flange.

6. The fuse of claim 5, wherein the cutting member further comprises a sealing ring sleeved on the periphery of the flange, and the flange is attached to the housing through the sealing ring.

7. A fusing structure comprising a fuse element and the fuse element of any one of claims 1 to 6, wherein the fuse element is disposed between the conductive element of the fuse element and a main circuit of a device to be protected, and the first gas generator of the fuse element is connected in parallel to both sides of the fuse element.

8. The fusing structure of claim 7, further comprising a filter in series with the first gas generator, an end of the filter remote from the first gas generator being electrically connected to an end of the melt remote from the conductive member.

9. The fuse structure of claim 7, further comprising a differential pressure detector electrically connected to the second gas generator of the fuse.

10. A vehicle comprising a fuse structure as claimed in any one of claims 7 to 9.