Excitation fuse of two-way conducting bar
By setting two conductor bars in the excitation fuse and changing its structural shape and layout, the problem of multi-circuit protection in a confined space is solved, achieving a compact design and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-03-13
AI Technical Summary
Existing excitation fuses are difficult to protect multiple circuits simultaneously in situations with limited space and complex circuits, and their miniaturization is limited, leading to installation difficulties.
Two conductive busbars are set in an excitation fuse. By changing the structural shape and layout of the conductive busbars, they can be made compact, including straight busbars, C-type or L-type structures. An insulating element is set at the pre-break point, and the piston displacement disconnects the conductive busbars.
It enables simultaneous protection of two circuits in a confined space, reducing design difficulty and production costs, while also minimizing waste and adapting to special installation environments.
Smart Images
Figure CN223993252U_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of circuit protection, specifically referring to an excitation fuse for a dual-channel busbar used for circuit protection. Background Technology
[0002] Currently, a relatively mature type of activated fuse product exists on the market. It includes a housing, an electronic ignition device, a piston, and a conductive busbar, arranged sequentially within the housing. The electronic ignition device is a gas generator that receives a trigger signal, generates and releases high-pressure gas, which drives the piston to move. The force generated by the piston's movement breaks the conductive busbar, cutting off the circuit loop and achieving circuit protection. To improve arc extinguishing and breaking capacity, a fusible element or a fuse element is typically connected in parallel with the conductive busbar. After the piston disconnects the conductive busbar, it also disconnects the fusible element or fuse element, thus breaking the circuit. Compared to traditional thermal fuses, activated fuses mechanically disconnect the conductive busbar and respond quickly, making them more suitable for various environments requiring circuit disconnection. For example, in new energy vehicles, in the event of a collision but without a short-circuit current, the vehicle control system can send a trigger signal to the electronic ignition device to disconnect the conductive busbar and cut off the circuit, achieving safety protection. However, compared to traditional fuses, activated fuses are larger and occupy more space.
[0003] When multiple circuits require simultaneous protection by excitation fuses, multiple excitation fuses are needed to protect each circuit. In situations with ample installation space, this can accommodate multiple excitation fuses. However, in confined spaces and complex circuit environments, such as those found in new energy vehicles, it becomes difficult to meet the requirements. Currently, the solution is to miniaturize the excitation fuses. However, miniaturization has limitations while still fulfilling the necessary functions of the excitation fuse. Therefore, in special installation scenarios, reducing the number of excitation fuses is imperative. Summary of the Invention
[0004] The dual-circuit busbar excitation fuse of the present invention integrates two excitation fuses into one by setting two busbars in one excitation fuse. By setting two busbars in one excitation fuse and changing the structural shape and different layout of the two busbars, the excitation fuse structure is more compact, smaller in size, and the design difficulty and manufacturing cost are reduced. At the same time, it can be used in two circuits.
[0005] To achieve the above objectives, the present invention provides a dual-circuit busbar excitation fuse, comprising a displaceable piston, an insulated first busbar and a second busbar, one end of the first busbar and the second busbar located outside the excitation fuse being a connection end; both the first busbar and the second busbar are straight-line structures, or at least one of the busbars is a C-shaped structure or an L-shaped structure; pre-breaks are respectively provided at corresponding positions on the sides of the first busbar and the second busbar that are far apart in the width direction, forming notches that penetrate the thickness of the busbars, the pre-breaks of the first busbar and the second busbar are arranged in parallel and spaced apart, the piston is arranged corresponding to the pre-breaks of the first busbar and the second busbar, and when the piston is displaced, the first busbar and the second busbar are disconnected from the pre-breaks.
[0006] Preferably, when all are L-shaped structures, the first conductive bar and the second conductive bar are arranged in opposite directions, and the connection ends are distributed on the four sides of the excitation fuse; when at least one is a C-shaped structure, the connection ends are distributed on opposite sides or three adjacent sides of the excitation fuse; when one of them is an L-shaped structure, the connection ends are distributed on three adjacent sides of the excitation fuse.
[0007] Preferably, the first and second conductive bars at the notch are provided with a weak point to form the pre-break.
[0008] Preferably, an insulating element is provided between the pre-break points of the first and second conductive busbars.
[0009] Preferably, the pre-breaks of the first and second conductive busbars are on the same plane or staggered at different heights.
[0010] Preferably, the piston has grooves at the end faces of the first and second conductive busbars corresponding to the pre-break points. When the piston moves and disconnects the first and second conductive busbars from the pre-break points, the pre-break points in the width direction are placed in the grooves of the piston.
[0011] Preferably, the bottoms of the grooves on the piston corresponding to the pre-breaks of the first and second conductive bars are on the same plane or at different heights.
[0012] Preferably, when the conductive busbar has a C-shaped structure, the notch is a groove formed by the C-shaped structure.
[0013] Preferably, the pre-break points of the first conductive busbar and the second conductive busbar are located in the same plane or different planes; the piston simultaneously or sequentially disconnects the pre-break points of the first conductive busbar and the second conductive busbar.
[0014] Preferably, the width of the pre-break is the minimum width of the first conductive busbar and the second conductive busbar.
[0015] The dual-circuit busbar excitation fuse of the present invention has two busbars in one excitation fuse. By using different structural shapes and layouts of the two busbars, the structure of the two busbars is made compact, so that the excitation fuse can protect two circuits while occupying less space and generating less waste during the production process, thereby reducing design difficulty and manufacturing costs. At the same time, it allows for diverse layout of the connection ends of the two busbars on the outside of the excitation fuse, making it more suitable for the requirements of special installation environments. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of a dual-channel busbar with a straight-line structure. In Figure a, there is no piston, while in Figure b, there is a piston.
[0017] Figure 2 This is a schematic diagram of a C-shaped dual-channel busbar, where Figure a has no piston and Figure b has a piston.
[0018] Figure 3 This is a schematic diagram of a dual-channel busbar with an L-shaped structure, where Figure a has no piston and Figure b has a piston.
[0019] Figure 4 This is a schematic diagram of a dual-channel busbar, one channel having a straight-line structure and the other a C-shaped structure. In Figure a, there is no piston, while in Figure b, there is a piston.
[0020] Figure 5 This is a schematic diagram of an excitation fuse with a C-shaped structure and dual conductor busbars.
[0021] Figure 6 This is a schematic diagram of a dual-channel busbar, one channel having a straight-line structure and the other an L-shaped structure.
[0022] Figure label:
[0023] 1. Housing; 2. First conductive bar; 3. Second conductive bar; 4. Pre-cut (201, 301); 5. Connecting end (202, 302); 6. Insulating component; 7. Piston; 8. Groove 501; 9. Electronic ignition device 100; 102. Fixing component; 101. Top cover; 103. Upper housing; 104. Piston; 105. Insulating component; 106. First conductive bar; 106a. Pre-cut; 107. Lower housing; 108. Detailed Implementation
[0024] The excitation fuse of the dual-channel conductive busbar of the present invention includes a displaceable piston, an insulated first conductive busbar and a second conductive busbar, one end of the first conductive busbar and the second conductive busbar located outside the excitation fuse is a connection end; the first conductive busbar and the second conductive busbar are both straight-line structures, or at least one of the conductive busbars is a C-shaped structure or an L-shaped structure; notches penetrating the thickness of the conductive busbars are respectively provided at corresponding positions on the sides of the first conductive busbar and the second conductive busbar that are far apart in the width direction to form pre-breaks, the pre-breaks of the first conductive busbar and the second conductive busbar are arranged in parallel and spaced apart, the piston is arranged corresponding to the pre-breaks of the first conductive busbar and the second conductive busbar, and when the piston is displaced, the first conductive busbar and the second conductive busbar are disconnected from the pre-breaks.
[0025] The following describes preferred embodiments in conjunction with the accompanying drawings. The directional terms used are for reference only and do not constitute a limitation on the technical solutions of this invention.
[0026] For the excitation fuse of the dual-bus type, see [link / reference]. Figure 1 Including housing 1, in Figure 1 The image only shows part of the structure of the housing 1. A first conductive bar 2 and a second conductive bar 3 are provided on the housing 1. The first conductive bar 2 and the second conductive bar 3 are arranged in parallel and spaced apart and are on the same plane.
[0027] Both the first conductive busbar 2 and the second conductive busbar 3 are straight-line structures, i.e., long strip-shaped flat structures. Notches penetrating the thickness of the conductive busbars are respectively formed on the sides of the first conductive busbar 2 and the second conductive busbar 3 that are far apart in the width direction. Weak points, such as V-grooves, are formed on the first conductive busbar 2 and the second conductive busbar 3 at the notches to reduce mechanical strength, creating pre-breaks (201, 301) at the notches. The width of the pre-break is smaller than the width of other parts of the conductive busbars; that is, the width at the pre-break is the smallest. During installation, the housing 1 limits the notches. An insulating element 4 is placed between the pre-breaks of the first conductive busbar 2 and the second conductive busbar 3 to insulate the first conductive busbar and the second conductive busbar. The insulating element 4 is placed on the housing 1, and its placement must satisfy both the insulation requirements between the first conductive busbar 2 and the second conductive busbar 3 and the requirement not to affect piston displacement. By placing the insulating element 4 between the pre-breaks of the two conductive busbars, the insulation performance between the two conductive busbars is increased, preventing creepage.
[0028] The two ends of the first conductive bar 2 and the second conductive bar 3 are located on the outside of the housing 1, serving as the connection terminals for activating the fuse. (See attached image) Figure 1 When the first conductive busbar 2 and the second conductive busbar 3 are in a straight-line structure, the connection ends (202, 302) at both ends are located on opposite sides of the excitation fuse.
[0029] Piston 5 is configured with pre-breaks corresponding to the first conductive busbar 2 and the second conductive busbar 3. The end face of piston 5 corresponding to the pre-breaks (201, 301) is respectively provided with grooves 501. When piston 5 is displaced, the two grooves 501 cover the pre-breaks (201, 301) in the width direction of the conductive busbar, so as to ensure that after the pre-breaks (201, 301) are broken, the insulation performance after breakage is improved under the covering constraint of the grooves 501 of piston 5.
[0030] Electronic ignition device, Figure 1 As not shown in the figure, the electronic ignition device can act according to the received trigger signal, release high-pressure gas as driving force, drive piston 5 to move in the direction of the first conductive bar 2 and the second conductive bar 3. The displaced piston 5 disconnects the first conductive bar 2 and the second conductive bar 3 from the pre-break (201, 301) and moves away from the first conductive bar 2 and the second conductive bar 3 with the disconnected part, forming a break on the first conductive bar 2 and the second conductive bar 3.
[0031] The first conductive bar 2 and the second conductive bar 3 of the straight-line structure have notches on the outside of the two conductive bars to minimize the width of the pre-break in the housing 1, and the pre-breaks of the two conductive bars are arranged adjacent to each other with the shortest insulation distance, making the structure inside the housing 1 more compact and smaller in volume.
[0032] exist Figure 1 Based on this, the straight-line structure of the first conductive busbar 2 and the second conductive busbar 3 is changed to a C-shaped structure, see [reference]. Figure 2 Both the first conductive busbar 2 and the second conductive busbar 3 have a C-shaped structure. The two connecting ends 202 of the first conductive busbar 2 are located on the same side, and the two connecting ends 302 of the second conductive busbar 3 are located on the same side. The bottom of the groove of the C-shaped structure of the first conductive busbar 2 and the second conductive busbar 3 is a pre-break (201, 301). The first conductive busbar 2 and the second conductive busbar 3 are arranged in opposite directions, that is, the opening end of the groove of the C-shaped structure faces the outside of the housing 1, so that the pre-breaks (201, 301) of the first conductive busbar 2 and the second conductive busbar 3 are arranged adjacent to each other in the housing 1. The two connecting ends (202, 302) of the first conductive busbar 2 and the second conductive busbar 3 are located on opposite sides of the excitation fuse, so that there is sufficient insulation distance between the connecting ends of the first conductive busbar 2 and the second conductive busbar 3 located outside the housing 1, and no additional insulation structure is required between the connecting ends of the first conductive busbar 2 and the second conductive busbar 3 outside the housing 1. Meanwhile, since the two connecting ends of the first conductive busbar 2 are located on the same side of the excitation fuse, and the two connecting ends 302 of the second conductive busbar 3 are located on the same side, when the connecting ends of the two circuits are located on opposite sides of the excitation fuse, they can be directly connected without multiple bends or connecting through adapters, thus saving connecting materials and connecting space.
[0033] exist Figure 1Based on this, the straight-line structure of the first conductive busbar 2 and the second conductive busbar 3 is changed to an L-shaped structure, see [reference]. Figure 3 The first conductive busbar 2 and the second conductive busbar 3 are L-shaped and arranged in opposite directions. The two connecting ends 202 of the first conductive busbar 2 are located on adjacent sides of the excitation fuse, and the two connecting ends 302 of the second conductive busbar 3 are located on the other adjacent sides of the excitation fuse. This results in the four connecting ends (202, 302) of the first and second conductive busbars 2 and 3 being located on the four sides of the excitation fuse. The connecting ends of the two conductive busbars are evenly distributed on the four sides of the excitation fuse, with relatively large distances between each pair, eliminating the need for additional external insulation. For special operating conditions, such as when external mounting connections are located around the excitation fuse, this significantly reduces design complexity and saves material costs.
[0034] exist Figure 1 Based on this, the first conductive busbar 2 is a straight-line structure, and the second conductive busbar 3 is changed to a C-shaped structure. (See also...) Figure 4 The two connecting ends 202 of the first conductive busbar 2 are located on opposite sides of the excitation fuse, and the two connecting ends 302 of the second conductive busbar 3 are located on the other side of the excitation fuse, so that the four connecting ends (202, 302) of the first conductive busbar 2 and the second conductive busbar 3 are located on the three sides of the excitation fuse respectively. Figure 4 In this configuration, the two connecting ends 302 of the second conductive bus 3 are located on the same side of the excitation fuse, and the two connecting ends 202 of the first conductive bus 2 are located on opposite sides of the excitation fuse. This addresses the operating condition where one set of external mounting connections to the excitation fuse is on the same side of the fuse, and the other set is on opposite sides of the fuse. Figure 4 The solution facilitates design, reduces the amount of connecting materials, and lowers costs.
[0035] See Figure 5 The specific structure of the excitation fuse is briefly described using a C-shaped structure for both conductive busbars. The housing is formed by splicing an upper housing 103 and a lower housing 107. The first conductive busbar 106 and the second conductive busbar 108 are arranged in parallel and spaced apart between the contact surfaces of the upper housing 103 and the lower housing 107. Both the first conductive busbar 106 and the second conductive busbar 108 are C-shaped structures and arranged in opposite directions. The connection ends of the first conductive busbar 106 and the second conductive busbar 108 are located on opposite sides of the housing, with the two connection ends of the first conductive busbar 106 and the two connection ends of the second conductive busbar 108 located on the same side. The pre-break 106a of the first conductive busbar 106 and the pre-break 106a of the second conductive busbar 108 are located in the housing. Figure 5(Not shown in the diagram) Insulating intervals are provided, with insulating elements 105 placed between the pre-break points. A piston 104 and an electronic ignition device 100 are sequentially arranged in the cavity of the upper housing 103. A fixing member 102 is provided between the upper housing 103 and the top cover 101. The electronic ignition device 100 is fixedly mounted at the upper end of the cavity of the upper housing 103 by the fixing member 102 and the top cover 101. The high-pressure gas release end of the electronic ignition device 100 is located in the cavity of the upper housing 103. The piston 104 is positioned corresponding to the pre-break points of the first conductive bar 106 and the second conductive bar 108. A space is provided on the lower housing 107 for the piston 104 to move with the disconnected conductive bar portion.
[0036] See Figure 6 ,exist Figure 1 Based on this, the first conductive busbar 2 has a straight-line structure, and the second conductive busbar 3 has an L-shaped structure, so that the connection ends of the first conductive busbar 2 and the second conductive busbar 3 are distributed on three adjacent sides of the excitation fuse. Simultaneously, the pre-break ends of the first conductive busbar 2 and the second conductive busbar 3 facing the piston 5 are on different planes. Also, the distances from the bottom of the two grooves 501 of the piston 5 to the end of the piston 5 facing the electronic ignition device 100 are different. This structural design allows the piston 5 to simultaneously disconnect the pre-break ends of the first and second conductive busbars, which are located on different planes.
[0037] In other embodiments, the pre-break points of the first and second conductive busbars are on the same plane, but the bottoms of the two grooves 501 of the piston 5 are at different distances from the end of the piston 5 facing the electronic ignition device 100, causing the piston 5 to disconnect the pre-break points of the first and second conductive busbars sequentially. Alternatively, the pre-break points of the first and second conductive busbars facing the piston are on different planes, while the bottoms of the two grooves of the piston are at the same distance from the end of the piston facing the electronic ignition device, causing the piston 5 to disconnect the pre-break points of the first and second conductive busbars sequentially.
[0038] Working principle:
[0039] The electronic ignition device 100 operates according to the received trigger signal, releasing high-pressure gas as a driving force to drive the piston 104 to move. The piston 104 moves and disconnects from the pre-break point of the first conductive bar 106 and the second conductive bar 108, thereby disconnecting the first conductive bar 106 and the second conductive bar 108.
Claims
1. A dual conductor bus energizing fuse, characterized by, The application relates to an excitation fuse, which comprises a displaceable piston, a first conductive row and a second conductive row arranged in an insulating manner, and one end of the first conductive row and the second conductive row arranged outside the excitation fuse is a connecting end; the first conductive row and the second conductive row are in a straight row structure, or at least one of the conductive rows is in a C-shaped structure or an L-shaped structure; a notch penetrating the thickness of the conductive row is arranged at the position corresponding to the side of the first conductive row and the second conductive row away from each other in the width direction to form a pre-breakage, the pre-breakages of the first conductive row and the second conductive row are arranged in parallel and at intervals, and the piston is arranged corresponding to the pre-breakages of the first conductive row and the second conductive row; when the piston is displaced, the first conductive row and the second conductive row are disconnected from the pre-breakages.
2. The energized fuse of claim 1, wherein, When the first conductive row and the second conductive row are both in an L-shaped structure, the connecting ends are arranged on four sides of the excitation fuse; when at least one of the conductive rows is in a C-shaped structure, the connecting ends are arranged on opposite two sides or adjacent three sides of the excitation fuse; when one of the conductive rows is in an L-shaped structure, the connecting ends are arranged on adjacent three sides of the excitation fuse.
3. The energized fuse of claim 1, wherein, A disconnection weak part is arranged on the first conductive row and the second conductive row at the notch to form the pre-breakage.
4. The energized fuse of claim 3, wherein, An insulating part is arranged between the pre-breakages of the first conductive row and the second conductive row.
5. The energized fuse of claim 1, wherein, The pre-breakages of the first conductive row and the second conductive row are arranged in the same plane or are arranged in different planes.
6. The energized fuse of claim 5, wherein, Grooves are arranged on the end faces of the piston corresponding to the pre-breakages of the first conductive row and the second conductive row; when the piston is displaced and the first conductive row and the second conductive row are disconnected from the pre-breakages, the pre-breakages in the width direction are arranged in the grooves of the piston.
7. The energized fuse of claim 6, wherein, The bottoms of the grooves on the piston corresponding to the pre-breakages of the first conductive row and the second conductive row are arranged in the same plane or are arranged in different planes.
8. The energized fuse of claim 1, wherein, When the conductive row is in a C-shaped structure, the notch is a groove formed by the C-shaped structure.
9. The energized fuse of claim 1, wherein, The pre-breakages of the first conductive row and the second conductive row are arranged in the same plane or are arranged in different planes; the piston simultaneously or successively disconnects the pre-breakages of the first conductive row and the second conductive row.
10. The energized fuse of claim 1, wherein, The width at the pre-breakage is the minimum width of the first conductive row and the second conductive row.