Smart fuses with high and low voltage isolation functions

Abstract

This application provides an intelligent fuse with high and low voltage isolation function, comprising: a first housing, a first excitation source, a second excitation source, an impact member, and an isolation assembly; the isolation assembly is stacked with the first housing; the isolation assembly is provided with a first wire positioning groove, a second wire positioning groove, a third opening, a first connecting hole, and a second connecting hole; the position of the first connecting hole corresponds to the first end of the first fusible element, and the position of the second connecting hole corresponds to the second end of the first fusible element; the third opening communicates with the first cavity; the impact member is disposed on the third opening; a first connecting portion is formed in the impact member; the first wire positioning groove passes through the first connecting portion; when the impact member is triggered by the first excitation source or the second excitation source, it is pushed by the high-pressure gas generated by the first excitation source or the second excitation source to enter the first housing through the third opening to perform a cutting operation, and at the same time, the first wire is broken through the first connecting portion.

Description

Technical Field

[0001] This application belongs to the field of emergency protection device technology, specifically relating to an intelligent fuse with high and low voltage isolation function. Background Technology

[0002] Currently, the integrated active and passive protection intelligent fuse is a safety protection device used in the main circuit of high-voltage systems. With the increasing market demands for intelligence and safety in electric vehicles, it is gradually replacing traditional thermal fuses as the mainstream choice. Combining active and passive protection functions, it can more reliably cut off the circuit under different circumstances, ensuring the safety of people and the vehicle.

[0003] Achieving high- and low-voltage isolation is currently the main challenge faced in the design and application of this type of product. Typically, when an abnormal external current causes the fusible element in this type of smart fuse to melt, it generates an extremely high arc voltage. If this high-voltage signal cannot be effectively isolated from the external triggering circuit, it can cause serious safety accidents. Current solutions separate the active and passive triggering excitation sources, each corresponding to a different piston and breaking element to cut off the circuit, with sufficient insulation distance between them. However, this results in a very large product size and high cost. Summary of the Invention

[0004] This application provides an intelligent fuse with high and low voltage isolation function, aiming to reduce the size of the intelligent fuse while achieving high and low voltage isolation.

[0005] In a first aspect, this application provides an intelligent fuse with high and low voltage isolation function, comprising: a first housing, a first excitation source, a second excitation source, an impact element, and an isolation assembly; the isolation assembly is stacked with the first housing;

[0006] The isolation assembly has a first cavity and a third opening, the third opening is connected to the first cavity, and the impact member is disposed on the third opening; a first melt is disposed in the first cavity;

[0007] The impact member is provided with a first connecting portion;

[0008] A first wire is connected to a first end of the first melt, the first wire extends out of the first cavity to the surface of the isolation component and passes through the first connection portion until it is connected to the first end of the first excitation source; a second wire is connected to a second end of the first melt, the second wire extends out of the first cavity to the surface of the isolation component and is connected to the second end of the first excitation source.

[0009] When the impactor is triggered by the first excitation source or the second excitation source, it is pushed by the high-pressure gas generated by the first excitation source or the second excitation source to enter the first housing through the third opening to perform a cutting operation, and at the same time, the first wire is broken through the first connecting part.

[0010] In conjunction with the first aspect, in one possible embodiment, the isolation assembly further includes a first wire positioning groove and a second wire positioning groove, the first wire positioning groove passing through the first connecting portion; the first wire extends out of the first cavity to the surface of the isolation assembly and extends along the second wire positioning groove, passing through the first connecting portion until it connects to the second end of the first excitation source; the second wire extends out of the first cavity to the surface of the isolation assembly and extends along the second wire positioning groove until it connects to the second end of the first excitation source; when the impact member is triggered, it is pushed by high-pressure gas into the first housing through the third opening to perform a cutting operation, while simultaneously severing the first wire through the first connecting portion.

[0011] In conjunction with the first aspect, in one possible embodiment, the impact member further includes a second connecting portion; the second wire positioning groove passes through the second connecting portion;

[0012] The second wire passes through the second connection hole and extends along the second wire positioning groove, through the second connection portion, until it is connected to the second end of the first excitation source;

[0013] When the impactor is triggered, it is propelled by high-pressure gas into the first housing through the third opening to perform a cutting operation, while simultaneously severing the second wire through the second connecting part.

[0014] In conjunction with the first aspect, in one possible embodiment, the first wire includes a first wire segment and a second wire segment; a first end of the first wire segment is connected to a first end of the first melt and extends out from the first connection hole, along the first wire positioning groove, until the second end of the first wire segment enters the first connection portion; a first end of the second wire segment is connected to a first end of the first excitation source and extends along the first wire positioning groove, until the second end of the second wire segment enters the first connection portion and connects with the second end of the first wire segment.

[0015] In conjunction with the first aspect, in one possible embodiment, the second end of the first conductor segment and the second end of the second conductor segment are stacked in the first connecting portion to form a conductive contact portion, and the conductive contact portion is interference-fitted with the first connecting portion.

[0016] In conjunction with the first aspect, in one possible embodiment, the first conductor is provided with a disconnect weak point, which disconnects the first conductor when the impact member is triggered.

[0017] In conjunction with the first aspect, in one possible embodiment, the circuit board is further included; the circuit board is provided with an internal trigger circuit and has a first lead-out end and a second lead-out end; the first wire extends from the first end of the first wire positioning groove to the second end of the first wire positioning groove, and then continues to extend into the first lead-out end to connect with the internal trigger circuit, and is connected to the first end of the first excitation source through the internal trigger circuit; the second wire extends from the first end of the second wire positioning groove to the second end of the second wire positioning groove, and then continues to extend into the second lead-out end to connect with the internal trigger circuit, and is connected to the second end of the first excitation source through the internal trigger circuit.

[0018] In conjunction with the first aspect, in one possible embodiment, a first connector is provided in the first lead-out end, and a second connector is provided in the second lead-out end; the second end of the first wire passes through the first lead-out end and is connected to the first connector, and the second end of the second wire passes through the second lead-out end and is connected to the second connector.

[0019] In conjunction with the first aspect, in one possible embodiment, the second end of the first conductor segment is connected to a first connector, and the second end of the second conductor segment is connected to a second connector; the first connector and the second connector engage at the first limiting portion of the first conductor positioning groove, so that the first conductor and the second conductor are connected.

[0020] In conjunction with the first aspect, in one possible embodiment, the first connector and the second connector are magnetic connectors.

[0021] In conjunction with the first aspect, in one possible embodiment, the isolation assembly includes a first isolation plate, which, when combined with the first housing, forms the first cavity, the first opening, and the second opening; the first end face of the first isolation plate includes the first wire positioning groove, the second wire positioning groove, the first connection hole, and the second connection hole.

[0022] As can be seen, the intelligent fuse with high and low voltage isolation function in this application includes: a first housing, a first excitation source, a second excitation source, an impact element, and an isolation assembly; the isolation assembly is stacked with the first housing; the isolation assembly has a first cavity including a first opening and a second opening, a first wire positioning groove, a second wire positioning groove, a first opening, a first connecting hole, and a second connecting hole; the position of the first connecting hole corresponds to the first end of the first fusible element, and the position of the second connecting hole corresponds to the second end of the first fusible element; the first opening communicates with the first cavity; the impact element is disposed on the first opening; The impact member has a first connecting portion; the first wire positioning groove passes through the first connecting portion; the first end of the first molten element is also connected to a first wire, which exits from the first connecting hole, extends along the first wire positioning groove, passes through the first connecting portion, and connects to the first end of the first excitation source; the second end of the first molten element is also connected to a second wire, which exits from the second connecting hole, extends along the second wire positioning groove, and connects to the second end of the first excitation source; when the impact member is triggered by the first excitation source or the second excitation source, it is pushed by the high-pressure gas generated by the first excitation source or the second excitation source into the first housing through the third opening to perform a cutting operation, and at the same time, the first wire is broken through the first connecting portion. In this way, while achieving high and low pressure isolation, only one impact member is needed to participate in the cutting operation, reducing the size of the smart fuse. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a cross-section provided in an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the first structure of the intelligent fuse with high and low voltage isolation function provided in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the second structure of the intelligent fuse with high and low voltage isolation function provided in the embodiments of this application;

[0027] Figure 4 This is a circuit diagram of an intelligent fuse with high and low voltage isolation function provided in an embodiment of this application;

[0028] Figure 5 This is a schematic diagram of a first structure of the first conductor in the first connecting part according to an embodiment of this application;

[0029] Figure 6 This is a schematic diagram of a second structure of the first conductor in the first connecting portion provided in an embodiment of this application;

[0030] Figure 7 This is a schematic diagram of a third structure of the first conductor in the first connecting portion provided in an embodiment of this application;

[0031] Figure 8 This is a schematic diagram of a fourth structure of the first conductor in the first connecting part provided in the embodiments of this application. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0033] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, systems, products, or apparatuses.

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] Currently, achieving high- and low-voltage isolation is the main challenge faced in the design and application of this type of product. Typically, when an abnormal external current causes the fusible element in this type of smart fuse to melt, it generates an extremely high arc voltage. If this high-voltage signal cannot be effectively isolated from the external triggering circuit, it can cause serious safety accidents. Current solutions separate the active and passive triggering excitation sources, each corresponding to a different piston and breaking element to cut off the circuit, with sufficient insulation distance between them. However, this results in a very large product size and high cost.

[0036] To address the aforementioned issues, this application provides an intelligent fuse with high-low voltage isolation functionality. This intelligent fuse with high-low voltage isolation functionality can be applied in high-low voltage isolation scenarios. The intelligent fuse with high-low voltage isolation functionality in this application includes: a first housing, a first excitation source, a second excitation source, an impact element, and an isolation assembly; the isolation assembly is stacked with the first housing; the isolation assembly has a first cavity, which has a first opening and a second opening; a first fusible element is disposed in the first cavity, and a first conductor and a second conductor are respectively connected to both ends of the first fusible element; a first end of the first conductor is disposed in the first cavity, and a second end of the first conductor protrudes from the first opening to form a first terminal; a first end of the second conductor is disposed in the first cavity, and a second end of the second conductor protrudes from the second opening to form a second terminal; the isolation assembly also has a first wire positioning groove, a second wire positioning groove, a third opening, a first connecting hole, and a second connecting hole; the position of the first connecting hole corresponds to the first end of the first fusible element, and the position of the second connecting hole corresponds to the second end of the first fusible element; the third opening communicates with the first cavity; the impact element is disposed on the third opening; The impact member has a first connecting portion; the first wire positioning groove passes through the first connecting portion; the first end of the first molten element is also connected to a first wire, which exits from the first connecting hole, extends along the first wire positioning groove, passes through the first connecting portion, and connects to the first end of the first excitation source; the second end of the first molten element is also connected to a second wire, which exits from the second connecting hole, extends along the second wire positioning groove, and connects to the second end of the first excitation source; when the impact member is triggered by the first excitation source or the second excitation source, it is pushed by the high-pressure gas generated by the first excitation source or the second excitation source into the first housing through the third opening to perform a cutting operation, and at the same time, the first wire is broken through the first connecting portion. In this way, while achieving high and low pressure isolation, only one impact member is needed to participate in the cutting operation, reducing the size of the smart fuse. This solution can be applied to various scenarios, including but not limited to the application scenarios mentioned above.

[0037] The specific structure will be described in detail below.

[0038] Please see Figures 1-3 This application provides an intelligent fuse with high and low voltage isolation function, comprising: a first housing 10-1, a first excitation source 71, a second excitation source 72, an impact member 20, and an isolation assembly; the isolation assembly is stacked with the first housing 10-1; the isolation assembly has a first cavity and a third opening, the third opening communicating with the first cavity, and the impact member 20 is disposed on the third opening; a first fusible element 40 is disposed in the first cavity; a first connecting portion 21 is disposed in the impact member 20; a first wire 514 is connected to the first end of the first fusible element 40, and the first wire 514 passes through the first cavity. The first cavity extends to the surface of the isolation component and passes through the first connecting portion 21 until it connects to the first end of the first excitation source 71; the second end of the first melt 40 is connected to a second wire 524, which extends out of the first cavity to the surface of the isolation component and connects to the second end of the first excitation source 71; when the impact member 20 is triggered by the first excitation source 71 or the second excitation source, it is pushed by the high-pressure gas generated by the first excitation source 71 or the second excitation source to enter the first housing through the third opening to perform a cutting operation, and at the same time, the first wire 514 is broken through the first connecting portion 21.

[0039] Specifically, the isolation assembly includes a first cavity (not labeled in the figure), which has a first opening 11 and a second opening 12. A first molten material 40 is disposed within the first cavity, and a first conductor 51 and a second conductor 52 are connected to its two ends, respectively. The first end of the first conductor 51 is disposed within the first cavity, and the second end of the first conductor 51 extends through the first opening 11 to form a first terminal 511. The first end of the second conductor 52 is disposed within the first cavity, and the second end of the second conductor 52 extends through the second opening to form a second terminal 521. The isolation assembly also includes a first wire positioning groove 512, a second wire positioning groove 522, a third opening, a first connecting hole 513, and a second connecting hole 523. The position of the first connecting hole 513 corresponds to the first end of the first molten material 40, and the position of the second connecting hole 523 corresponds to the second end of the first molten material 40. The third opening communicates with the first cavity. The impact member 20 is disposed on the third opening. The impact member 20 has a first connecting portion 21; the first wire positioning groove 512 passes through the first connecting portion 21; the first end of the first melt 40 is also connected to a first wire 514, which passes through the first connecting hole 513 and extends along the first wire positioning groove 512, passes through the first connecting portion 21, and connects to the first end of the first excitation source 71; the second end of the first melt 40 is also connected to a second wire 524, which passes through the second connecting hole 523 and extends along the second wire positioning groove until it connects to the second end of the first excitation source 71; when the impact member 20 is triggered by the first excitation source 71 or the second excitation source 72, it is pushed by the high-pressure gas generated by the first excitation source 71 or the second excitation source 72 into the first housing 10-1 through the first opening 11 to perform a cutting operation, and at the same time, the first wire 514 is broken through the first connecting portion 21.

[0040] In a specific implementation, the smart fuse with high and low voltage isolation function may further include a second housing 10-2, which, together with the first housing 10-1, forms the complete outer shell of the smart fuse with high and low voltage isolation function. The first housing 10-1 and the second housing 10-2 sandwich the isolation component in the middle.

[0041] Furthermore, the two pins on the first excitation source 71 are positive and negative. Typically, the positive terminal of the first excitation source 71 is connected to the high-voltage terminal (i.e., the first terminal) of the first melt 40, and the negative terminal of the first excitation source 71 is connected to the low-voltage terminal of the first melt 40. It can be understood that when the first terminal and the second terminal of the first excitation source 71 are not limited to specific positive and negative terminals, it is sufficient to determine that one end of the positive terminal is connected to the high-voltage terminal (i.e., the first terminal) of the first melt 40, and one end of the negative terminal is connected to the low-voltage terminal of the first melt 40. Similarly, the ends of other structures in this application are not specifically limited.

[0042] Please refer to the following for details. Figures 1-4 The intelligent fuse with high and low voltage isolation function also includes a second excitation source 72, which is triggered by an external triggering circuit. When the gunpowder in the first excitation source 71 is detonated, the metal sheet wrapped around the bottom of the first excitation source 71, which is connected to the negative terminal, will unfold outward. When the first excitation source 71 and the second excitation source 72 are too close, the unfolded negative terminal of the first excitation source 71 may pierce the metal sheet wrapped around the bottom of the second excitation source 72 to detonate it, or it may come into contact with the negative terminal of the second excitation source 72, which may pose a risk of the extremely high arc voltage generated by the melting of the first fusible element 40 being introduced into the external triggering circuit.

[0043] Furthermore, since the arc voltage generated by the melting of the first fuse 40 is much higher than the circuit voltage—for example, at the moment the first fuse 40 melts in a 1000V DC circuit, its arc voltage can reach nearly 5000V—sufficient insulation distance is required between the first excitation source 71 and the second excitation source 72 to ensure circuit safety. Therefore, in existing designs of integrated active and passive protection smart fuses, the first excitation source 71, connected in series with the internal trigger circuit 61, and the second excitation source 72, connected in series with the external trigger circuit, are generally far apart. Each first excitation source 71 uses a different piston to cut off the circuit and protect its operation, resulting in a generally larger product size and higher cost.

[0044] In this embodiment, a first connecting portion 21 is provided at the bottom of the impact member 20. The first connecting portion 21 can be a through hole, a penetrating cavity, etc. The first wire 514 passes through the first connecting portion 21, and its two ends are respectively connected to the first end of the first melt 40 and the first end of the first excitation source 71.

[0045] Under normal conditions, the first conductor 514 is normally housed in the first conductor positioning groove 512, enabling the connection between the first excitation source 71 and the first molten metal 40 through the internal trigger circuit 61. Under abnormal external current, when the first molten metal 40 melts and arcs, the internal trigger circuit 61 meets the triggering conditions of the first excitation source 71, causing the first excitation source 71 to start and release high-pressure gas, pushing the impact member 20 along with its side first connecting part 21 downwards, thereby breaking the first conductor 514. This cuts off the internal trigger circuit 61, preventing the extremely high arc voltage generated by the breaking of the first molten metal 40 from entering the external trigger circuit through the negative terminal of the second excitation source 72 due to short circuits or insufficient insulation distance, thus truly achieving isolation between the high voltage in the internal trigger circuit 61 and the low voltage in the external trigger circuit.

[0046] As can be seen, in this embodiment, when an external abnormal current causes the first fusible element 40 to melt, thereby triggering the excitation source by the internal triggering circuit 61, the wire connected to the excitation source by the internal triggering circuit 61 is cut off before the piston disconnects the circuit, thus making the internal triggering circuit 61 an open circuit. This avoids the risk of the extremely high arc voltage generated when the first fusible element 40 melts being transmitted to the protected equipment through the external triggering circuit, ensuring circuit safety. Moreover, this allows the first excitation source 71 and the second excitation source 72 to share a single impact element 20 without generating high-low voltage crosstalk.

[0047] In one possible embodiment, the impact member 20 is further provided with a second connecting portion; the second wire positioning groove 522 passes through the second connecting portion; the second wire 524 passes out from the second connecting hole 523 and extends along the second wire positioning groove 522, passes through the second connecting portion, and is connected to the second end of the first excitation source 71; when the impact member 20 is triggered, it is pushed by high-pressure gas from the first opening 11 into the first housing 10-1 to perform a cutting operation, and at the same time the second wire 524 is broken through the second connecting portion.

[0048] In a specific implementation, as an optional solution, the second end of the impact member 20 (such as...) Figure 2 A second connecting part is provided on the reference numeral 22, through which the second wire positioning groove 522 passes, so that the second wire 524 also passes through the second connecting part. In this way, when the impact member 20 is triggered, the first wire 514 and the second wire 524 can be simultaneously broken through the first connecting part 21 and the second connecting part, ensuring that the internal trigger circuit 61 is completely open.

[0049] In one possible embodiment, please refer to Figure 5The first wire 514 includes a first wire segment 5141 and a second wire segment 5142. The first end of the first wire segment 5141 is connected to the first end of the first melt 40 and extends out of the first connecting hole 513, along the first wire positioning groove 512, until the second end of the first wire segment 5141 enters the first connecting part 21. The first end of the second wire segment is connected to the first end of the first excitation source 71 and extends along the first wire positioning groove 512 until the second end of the second wire segment 5142 enters the first connecting part 21 and connects with the second end of the first wire segment 5141.

[0050] In specific implementation, the first wire 514 can be divided into two segments (i.e., the first segment 5141 and the second segment 5142). The first ends of the two segments are respectively connected to the first melt 40 and the first excitation source 71, and the second ends of the two segments are connected in the first connection part 21. When the impact member 20 is triggered, by pulling apart the connection between the first segment 5141 and the second segment 5142, the first excitation source 71 after the explosion forms an open circuit with the internal trigger circuit 61. Thus, as long as the metal sheet that unfolds at the bottom of the first excitation source 71 after the explosion and the second excitation source 72 connected in series with the external trigger circuit do not interfere with each other, the risk of the extremely high arc voltage generated when the signal melt melts is introduced into the protected equipment through the external trigger circuit is avoided. This greatly reduces the distance between the first excitation source 71 and the second excitation source 72. Furthermore, the first excitation source 71 and the second excitation source 72 can share a piston to cut off the same position on the conductive copper busbar, greatly reducing the product size and lowering the product cost.

[0051] Specifically, the second end of the first conductor 5141 and the second end of the second conductor 5142 are stacked in the first connecting portion 21 to form a conductive contact portion 53, and the conductive contact portion 53 is interference-fitted with the first connecting portion 21.

[0052] The first conductor 5141 and the second conductor 5142 are inserted into the first connecting part 21 from different directions to form a conductive contact 53. Under normal conditions, the first conductor 5141 and the second conductor 5142 form an interference fit within the first connecting part 21, which can prevent the connecting conductors from being abnormally pulled out of the conductive contact 53 when the product is subjected to environmental problems such as vibration or impact. Under abnormal external current, when the first molten element 40 melts and arcs, the internal trigger circuit 61 meets the triggering conditions, causing the first excitation source 71 to be triggered and release high-pressure gas, pushing the impact member 20 and its side first connecting part 21 downward, thereby pulling the end of the second conductor 5142 out of the first connecting part 21. This cuts off the internal trigger circuit 61, preventing the extremely high arc voltage generated by the breaking of the first molten element 40 from entering the external trigger circuit through the negative terminal of the second excitation source 72 due to short circuit or insufficient insulation distance, thus truly achieving isolation between the high voltage in the internal trigger circuit 61 and the low voltage in the external trigger circuit.

[0053] Optionally, the second ends of the first conductor 5141 and the second ends of the second conductor 5142 can also be bonded together with conductive adhesive, thus eliminating the need for an interference fit between the first conductor 5141 and the second conductor 5142 and the first connecting part 21. It is understood that various connection methods involved in this application can coexist as long as they do not conflict, and the selection will be based on actual production conditions; no unique limitation is imposed here.

[0054] In one possible embodiment, please refer to Figure 6 The first conductor 514 is provided with a disconnection weak part 54. When the impact member 20 is triggered, the first conductor 514 is disconnected through the disconnection weak part 54.

[0055] In a specific implementation, when the first conductor 514 is not segmented, a weak break portion 54 can be provided on the first conductor 514, which is housed in the first connecting portion 21. When the impact member 20 is triggered, the impact member 20 can more easily break the first conductor 514, thereby improving the reliability of the overall structure.

[0056] Specifically, the weak point 54 that is disconnected can be as follows: Figure 6 The wedge shape shown can also be formed by setting multiple hollow structures on the first conductor 514, or by directly thinning or reducing the size, etc., which is not limited here.

[0057] In one possible embodiment, a circuit board 60 is further included; the circuit board 60 is provided with an internal trigger circuit 61 and has a first lead-out terminal 62 and a second lead-out terminal 63; the first wire 514 extends from the first end of the first wire positioning groove 512 to the second end of the first wire positioning groove 512, and then continues to extend into the first lead-out terminal 62 to connect with the internal trigger circuit 61, and is connected to the first end of the first excitation source 71 through the internal trigger circuit 61; the second wire 524 extends from the first end of the second wire positioning groove 522 to the second end of the second wire positioning groove 522, and then continues to extend into the second lead-out terminal 63 to connect with the internal trigger circuit 61, and is connected to the second end of the first excitation source 71 through the internal trigger circuit 61. The second end of the second wire positioning groove 522 is provided with a second limiting part 68-2, which passes through the second limiting part 68-2 through the second lead-out terminal 63 on the circuit board 60 and is soldered to the second lead-out terminal 63 to connect with the second end of the first excitation source 71.

[0058] The following is combined Figures 1 to 4 Let me explain in detail the routing of each connecting wire.

[0059] Option 1:

[0060] The first end of the first conductor 514 is connected to the high-voltage end (i.e., the first end) of the first melt 40 by welding or other means. After passing through the first connecting hole 513, it reaches the first end face of the first isolation plate 31 and extends along the first conductor positioning groove 512 on the first end face of the first isolation plate 31. Its end is inserted into the first connecting part 21 (which can be a through hole) at the bottom side. Then, it passes out from the first connecting part 21 and continues to extend along the first conductor positioning groove 512 to the second end of the first conductor positioning groove 512. The second end is provided with a first limiting part 6. 8-1, the first limiting part 68-1 passes through the first lead-out terminal 62 on the circuit board 60 and is soldered to the first lead-out terminal 62 to connect with the internal trigger circuit 61; the internal trigger circuit 61 leads out a first printed wire 515 on the circuit board 60 and connects it to the first lead-out terminal 62 to connect with the second end of the first wire 514; the internal trigger circuit 61 leads out a second printed wire 516 on the circuit board 60 and connects it to the first end of the first excitation source 71, so that the first end of the first melt can be connected to the first end of the first excitation source 71 through the internal trigger circuit.

[0061] A third printed wire 525 is led out from the circuit board 60 and connected between the second end of the first excitation source 71 and the second lead 63. The second lead 63 is connected to the second end of the second wire 524. Similarly, the second wire 524 is connected to the second end of the first melt 40 and the second end of the first excitation source 71 in the same way, which will not be described in detail here.

[0062] Option 2:

[0063] The first end of the first conductor 5141 is connected to the high-voltage end (i.e., the first end) of the first melt 40 by welding or other means. After passing through the first connecting hole 513, it reaches the first end face of the first isolation plate 31 and extends along the first conductor positioning groove 512 on the first end face of the first isolation plate 31. Its end is inserted into the first connecting part 21 (which can be a through hole) at the bottom of the side. The internal trigger circuit 61 leads out the first printed conductor 515 on the circuit board 60 and connects it to the first lead end 62 to connect with the first conductor. The internal trigger circuit 61 leads out the second printed conductor 516 on the circuit board 60 and connects it to the first end of the first excitation source 71, so that the first end of the first melt can be connected to the first end of the first excitation source 71 through the internal trigger circuit. The first end of the second conductor 5142 is soldered to the first lead-out end 62 to connect with the internal trigger circuit 61. Then, it extends from the first lead-out end 62 to the first limiting part 68-1 at the second end of the first conductor positioning groove 512, and then extends along the first conductor positioning groove 512 to the first connecting part 21 to connect with the second end of the first conductor 5141.

[0064] A third printed wire 525 is led out from the circuit board 60 and connected between the second end of the first excitation source 71 and the second lead-out terminal 63, and connected to the second end of the second wire through the second lead-out terminal 63. Similarly, the second wire 524 is also connected to the second end of the first melt 40 and the second end of the first excitation source 71 in the same way, which will not be described in detail here.

[0065] Option 3:

[0066] In one possible embodiment, please refer to the following: Figure 7 The first lead-out end 62 is provided with a first connector 64, and the second lead-out end 63 is provided with a second connector 65; the second end of the first wire 514 passes through the first lead-out end 62 and is connected to the first connector 64, and the second end of the second wire 524 passes through the second lead-out end 63 and is connected to the second connector 65.

[0067] In a specific implementation, the first end of the first wire 514 is connected to the high-voltage end (i.e., the first end) of the first melt 40 by welding or other means. After passing through the first connecting hole 513 to the first end face of the first isolation plate 31, it extends along the first wire positioning groove 512 on the first end face of the first isolation plate 31 and passes through the first connecting part 21 (which can be a through hole) to the first limiting part 68-1 at the second end of the first wire positioning groove 512, and extends from the first limiting part 68-1 to the first lead-out end 62.

[0068] An internal trigger circuit 61 extends a first printed wire 515 from the circuit board 60 and connects it to a first lead-out terminal 62 to connect with a first wire. The internal trigger circuit 61 also extends a second printed wire 516 from the circuit board 60 and connects it to a first end of the first excitation source 71, allowing the first end of the first melt to connect to the first end of the first excitation source 71 via the internal trigger circuit. A third printed wire 525 is extended from the circuit board 60 and connects it between the second end of the first excitation source 71 and the second lead-out terminal 63, connecting the second end of the second wire via the second lead-out terminal 63, thus connecting the second end of the first melt 40 to the second end of the first excitation source 71.

[0069] A first connector 64 with a connection hole is provided in the first lead-out terminal 62. The second end of the first wire 514 is connected to the first lead-out terminal 62 through the connection hole of the first connector 64, so that the first wire 514 is connected to the internal trigger circuit 61. A second connector 65 with a connection hole is provided in the second lead-out terminal 63. The second wire 524 is connected to the second lead-out terminal 63 through the connection hole of the second connector 65, so that the second wire 524 is connected to the internal trigger circuit 61.

[0070] In one possible embodiment, please refer to Figure 8 The second end of the first conductor 5141 is connected to a first connector 66, and the second end of the second conductor 5142 is connected to a second connector 67; the first connector 66 and the second connector 67 are combined in the first limiting part 68-1 of the first conductor positioning groove 512 so that the first conductor 514 and the second conductor 524 are connected.

[0071] In specific implementation, the first end of the first wire 514 is connected to the high-voltage end (i.e., the first end) of the first melt 40 by welding or other means, and then passes upward through the first connecting hole 513 to the first end face of the first isolation plate 31. After that, it extends along the first wire positioning groove 512 on the first end face of the first isolation plate 31 and passes through the first connecting part 21 (which can be a through hole) to the second end of the first wire positioning groove 512. The internal trigger circuit 61 leads out the first printed wire 515 on the circuit board 60 and connects it to the first lead-out end 62 to connect with the first wire. The internal trigger circuit 61 leads out the second printed wire 516 on the circuit board 60 and connects it to the first end of the first excitation source 71, so that the first end of the first melt can be connected to the first end of the first excitation source 71 through the internal trigger circuit. The second end of the first segment wire 5141 is provided with a first connector 66, which is located at the second end of the first wire positioning groove 512. The second end of the second segment wire 5142 is provided with a second connector 67. The first wire segment 5141 is connected to the second wire segment 5142 at the second end of the first wire positioning groove 512 via the first connector 66, so that the first wire segment 5141 and the second wire segment 5142 are connected.

[0072] A third printed wire 525 is led out from the circuit board 60 and connected between the second end of the first excitation source 71 and the second lead-out terminal 63, and connected to the second end of the second wire through the second lead-out terminal 63. Similarly, the second wire 524 is also connected to the second end of the first melt 40 and the second end of the first excitation source 71 in the same way, which will not be described in detail here.

[0073] Optionally, the first connector 66 and the second connector 67 are magnetic connectors. The magnetic connectors have a certain attraction force, so that the first wire 514 will not break under normal conditions. However, when the impact member 20 is triggered, the strong pulling force is much greater than the attraction force of the magnetic connectors, causing the first connector 66 and the second connector 67 to separate, thereby opening the internal trigger circuit 61.

[0074] In one possible embodiment, the isolation assembly includes a first isolation plate 31, which, when combined with the first housing 10-1, forms the first cavity, the first opening 11, and the second opening 12. The first end face of the first isolation plate 31 includes the first wire positioning groove 512, the second wire positioning groove 522, the first opening 11, the first connecting hole 513, and the second connecting hole 523, all of which are disposed on the first end face of the first isolation plate 31.

[0075] It is understood that the structure of the second connecting part in this application is the same as the structure of the first connecting part 21. When the second connecting part is provided, the second wire can implement all the implementation methods involved in the first wire. However, the specific structures of the first wire and the second wire at the same time can be different. That is, different implementation methods can be selected, or the same implementation method can be used. The selection can be made according to the specific production situation, and no unique limitation is made here.

[0076] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can easily conceive of variations or substitutions without departing from the spirit and scope of the present invention, and various modifications and alterations can be made, including combinations of the different functions and implementation steps described above, as well as software and hardware implementation methods, all of which are within the protection scope of the present invention.

Claims

1. An intelligent fuse with high-low voltage isolation function, characterized in that, The utility model relates to a kind of cutting-off device, including: First shell, first excitation source, second excitation source, impact piece and isolation assembly; The isolation assembly is arranged with the first shell; First cavity and third opening are opened in the isolation assembly, the first cavity is opened with first opening and second opening, the third opening is communicated with the first cavity, and the impact piece is arranged on the third opening;First melt is arranged in the first cavity; First connecting part is opened in the impact piece; The first end of the first melt is connected with first wire, the first wire is out of the first cavity to the surface of the isolation assembly and passes through the first connecting part, until the first end of the first excitation source is connected;The second end of the first melt is connected with second wire, and the second wire is out of the first cavity to the surface of the isolation assembly and is connected with the second end of the first excitation source; When the impact piece is triggered by the first excitation source or the second excitation source, high-pressure gas generated by the first excitation source or the second excitation source pushes into the first shell from the third opening to perform cutting-off operation, and the first wire is disconnected through the first connecting part; The two ends of the first melt are respectively connected with first conductor and second conductor;The first end of first conductor is arranged in the first cavity, and the second end of first conductor is out of the first opening of first cavity and forms first wiring end;The first end of second conductor is arranged in the first cavity, and the second end of the second conductor is out of the second opening and forms second wiring end.

2. The intelligent fuse with high-low voltage isolation function according to claim 1, characterized in that, The isolation assembly further includes first wire positioning groove and second wire positioning groove, and the first wire positioning groove passes through the first connecting part; The first wire is out of the first cavity to the surface of the isolation assembly, and extends along the second wire positioning groove, passes through the first connecting part, until the second end of the first excitation source is connected;The second wire is out of the first cavity to the surface of the isolation assembly, and extends along the second wire positioning groove, until the second end of the first excitation source is connected; When the impact piece is triggered, high-pressure gas pushes into the first shell from the third opening to perform cutting-off operation, and the first wire is disconnected through the first connecting part. 3.The intelligent fuse with high-low voltage isolation function according to claim 2, characterized in that, Second connecting part is also opened in the impact piece, and the second wire positioning groove passes through the second connecting part; The second wire is out of the first cavity to the surface of the isolation assembly, and extends along the second wire positioning groove, passes through the second connecting part, until the second end of the first excitation source is connected; When the impact piece is triggered, high-pressure gas pushes into the first shell from the third opening to perform cutting-off operation, and the second wire is disconnected through the second connecting part.

4. The intelligent fuse with high-low voltage isolation function according to claim 2, characterized in that, The first wire includes first segment wire and second segment wire;The first end of the first segment wire is connected to the first end of the first melt, and the first segment wire is out of the first cavity to the surface of the isolation assembly, extends along the first wire positioning groove, until the second end of the first segment wire is inserted into the first connecting part. The first end of the second conductor is connected to the first end of the first excitation source and extends along the first conductor positioning groove until the second end of the second conductor penetrates into the first connecting part and is connected to the second end of the first conductor.

5. The intelligent fuse with high-low voltage isolation function according to claim 4, characterized in that, The second end of the first conductor and the second end of the second conductor are overlapped in the first connecting part to form a conductive contact part, and the conductive contact part is interference-fitted with the first connecting part.

6. The intelligent fuse with high-low voltage isolation function according to claim 1, characterized in that, The first conductor is provided with a breaking weak part, and the first conductor is broken through the breaking weak part when the impact piece is triggered.

7. The intelligent fuse with high-low voltage isolation function according to claim 2, characterized in that, Further comprising a circuit board, wherein the internal trigger circuit is arranged on the circuit board, and the circuit board is provided with a first lead-out end and a second lead-out end; The first conductor extends from the first end of the first conductor positioning groove to the second end of the first conductor positioning groove, and then extends into the first lead-out end to be connected to the internal trigger circuit and the first end of the first excitation source through the internal trigger circuit; The second conductor extends from the first end of the second conductor positioning groove to the second end of the second conductor positioning groove, and then extends into the second lead-out end to be connected to the internal trigger circuit and the second end of the first excitation source through the internal trigger circuit. 8.The intelligent fuse with high-low voltage isolation function according to claim 7, characterized in that, The first lead-out end is provided with a first connecting piece, and the second lead-out end is provided with a second connecting piece; The second end of the first conductor is connected to the first connecting piece after penetrating into the first lead-out end, and the second end of the second conductor is connected to the second connecting piece after penetrating into the second lead-out end. 9.The intelligent fuse with high-low voltage isolation function according to claim 4, characterized in that, The second end of the first conductor is connected to the first connecting piece after penetrating into the first lead-out end, and the second end of the second conductor is connected to the second connecting piece after penetrating into the second lead-out end.

10. The intelligent fuse with high-low voltage isolation function according to any one of claims 1-9, characterized in that, The second end of the first conductor is connected to the first connecting piece after penetrating into the first lead-out end, and the second end of the second conductor is connected to the second connecting piece after penetrating into the second lead-out end. The isolation assembly comprises a first isolation plate, and the first isolation plate and the first shell combine to form the first cavity, a first opening for the first conductor to pass through, and a second opening for the second conductor to pass through. The first end face of the first isolation plate comprises the first conductor positioning groove and the second conductor positioning groove.

Images