Connection terminal for a fuse and fuse having the same

Abstract

The utility model relates to a terminal for fuse and fuse with the terminal, the fuse still includes the fuse body, the terminal includes: the terminal main part, it includes by the first conductive material integral manufacture's fuse connecting part and cable connecting part, wherein the fuse connecting part is adjacent the fuse arrangement, the cable connecting part is arranged in the side of the fuse connecting part away from the fuse and is equipped with the terminal hole for connecting with external cable, the conductive layer is made by the second conductive material of the conductivity greater than the first conductive material and is welded to the side of the fuse connecting part facing the fuse, to make the fuse can be connected to the fuse connecting part via the conductive layer, the reinforcing structure is made by the third conductive material of the hardness greater than the first conductive material and surrounds the circumferential extension of the terminal hole, to make the reinforcing structure cover the hole wall of the terminal hole.

Description

Technical Field

[0001] This utility model relates to the field of circuit protection devices for power or electric vehicles, and more particularly to terminals for fuses and fuses having such terminals. Background Technology

[0002] Electric vehicles have experienced rapid development due to their advantages such as zero emissions, high efficiency, and low noise. Electric vehicles are powered by batteries, which are then distributed to various electrical components via an electronic control system to drive the vehicle using an electric motor. To ensure the safe operation of electric vehicles, fuses must be installed in the vehicle's electrical system to protect against short circuits and overloads. However, in existing technologies, the terminals of fuses used to connect the fuse element in series to external circuits are at risk of damage due to the long-term stress exerted by external cables, thus reducing the safety and reliability of the terminals and the fuses containing them.

[0003] Therefore, there is a need in this field for more reliable fuse terminals. Utility Model Content

[0004] The present invention aims to provide a wiring terminal for fuses that can at least solve some of the problems mentioned above.

[0005] This invention also aims to provide a fuse that utilizes the aforementioned improved terminal block.

[0006] According to one aspect of the present invention, a terminal block for a fuse is provided, the fuse further comprising a fusible element, the terminal block comprising: a wiring body including a fusible element connection portion and a cable connection portion integrally formed of a first conductive material, wherein the fusible element connection portion is arranged adjacent to the fusible element, and the cable connection portion is arranged on the side of the fusible element connection portion facing away from the fusible element and has a wiring hole for connecting to an external cable; a conductive layer made of a second conductive material with a conductivity greater than that of the first conductive material and welded to the side of the fusible element connection portion facing the fusible element, so that the fusible element can be connected to the fusible element connection portion via the conductive layer; and a reinforcing structure made of a third conductive material with a hardness greater than that of the first conductive material and extending circumferentially around the wiring hole, so that the reinforcing structure covers the hole wall of the wiring hole.

[0007] Compared with the prior art, the terminal block in this utility model is basically made of a material with low conductivity and hardness, while a conductive layer with high conductivity is provided on the side adjacent to the molten material to connect with the molten material, and the wiring hole for connecting with external cables is covered with a material with high hardness. This reduces manufacturing costs and overall weight while ensuring connection with the molten material, and avoids damage and deformation of the terminal block due to the force of external cables, thereby improving the safety, reliability and service life of the terminal block and the fuse with the terminal block.

[0008] Preferably, the reinforcing structure is constructed as a reinforcing sleeve with a U-shaped cross-section that snaps into the wiring hole.

[0009] Preferably, the second conductive material used to form the conductive layer and the third conductive material used to form the reinforcing structure are made of the same material.

[0010] Preferably, the wiring body is made of aluminum, and the conductive layer and the reinforcing structure are both made of copper.

[0011] Preferably, the wiring body is made of aluminum 1060 or aluminum 1070.

[0012] Preferably, the melt connection portion is provided with a first through hole penetrating the melt connection portion, and the conductive layer is provided with a second through hole aligned and communicating with the first sand filling hole to form a sand filling hole.

[0013] Preferably, the melt connection part is constructed as a circular plate structure, and the cable connection part is constructed as a rectangular plate structure.

[0014] According to another aspect of the present invention, a fuse is also provided, the fuse comprising a fusible element and a pair of the aforementioned terminals, the fusible element being connected to an external cable via the pair of terminals.

[0015] Preferably, the conductive layer is made of the same material as the melt.

[0016] Other features and advantages of this invention will partly be apparent to those skilled in the art upon reading this application, and partly will be described below in conjunction with the accompanying drawings in the detailed description. Attached Figure Description

[0017] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:

[0018] Figure 1 This is a perspective view of a fuse with improved wiring terminals according to the present invention;

[0019] Figure 2 This is an exploded view of the wiring terminals of a fuse with improved wiring terminals according to the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100-Terminal block; 10-Connector body; 11-Fuse connection part; 12-Cable connection part; 121-Connector hole; 20-Conductive layer; 30-Reinforcing structure; 40-Sand filling hole. Detailed Implementation

[0022] The schematic scheme of the wiring terminal for a fuse disclosed in this utility model is now described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of this utility model, the drawings are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut to better illustrate and explain the disclosure of this utility model. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0023] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0024] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0025] The terms "joining", "connection" and similar terms used in this utility model include both indirect connection of two components with the aid of an intermediate layer such as an adhesive or welding agent or an intermediate component such as a connector or transition piece, and direct connection of two components without the aid of any intermediate layer such as an adhesive or welding agent or an intermediate component such as a connector or transition piece.

[0026] Figures 1 to 2The present invention provides a terminal block 100 for a fuse, which is less expensive and lighter than conventional terminal blocks 100 while still providing sufficient strength for connection to external cables. The fuse includes a fusible element and a pair of terminals 100. The fusible tube may be a cylindrical structure made of insulating materials such as plastic. The fusible element may be made of conductive materials such as copper or silver and extends axially within the fusible tube. The pair of terminals 100 are respectively installed at both axial ends of the fusible tube to close the axial ends and connect to the corresponding axial ends of the fusible element, thereby connecting the fusible element to external cables via the pair of terminals 100, allowing the fusible element to be connected in series to the external protected circuit via the pair of terminals 100. It is understood that further details regarding the fuse, such as the arc-extinguishing medium, which are well known to those skilled in the art, will not be elaborated here.

[0027] As shown in the figure, the terminal block 100 may include a wiring body 10, a conductive layer 20, and a reinforcing structure 30.

[0028] Specifically, the wiring body 10 may include an integrally formed molten metal connection portion 11 and a cable connection portion 12. The molten metal connection portion 11 may be constructed as a circular plate structure with a substantially constant thickness in the axial direction, so that the molten metal connection portion 11 can be embedded in the inner circumference of the axial end of the molten tube to close the axial end of the molten tube. The cable connection portion 12 may be constructed as a rectangular plate structure with a substantially constant thickness and a smooth transition with the molten metal connection portion 11. It may be arranged on the side of the molten metal connection portion 11 facing away from the molten metal, i.e., the axially outer side, and has a wiring hole 121 that extends through the thickness direction, so that the cable connection portion 12 can be connected to an external cable through the wiring hole 121.

[0029] For example, the wiring hole 121 can be designed as an elongated hole as shown in the figure, for connection to an external cable by means of a fastener such as a bolt. Therefore, the diameter of the wiring hole 121 needs to be designed to allow the fastener to pass through. Alternatively, in embodiments not shown, the wiring hole 121 can also be designed as a circular hole or a square shape, as long as the above-described function is satisfied.

[0030] The conductive layer 20 can be welded to the axial inner surface of the melt connection portion 11 facing the melt, so as to tightly bond with the melt connection portion 11. The melt can be connected to an external cable via the conductive layer 20, the melt connection portion 11, and the cable connection portion 12. The wiring body 10 can be made of a first conductive material, while the conductive layer 20 can be made of a second conductive material with a conductivity greater than that of the first conductive material. In particular, the conductive layer 20 can be made of the same material as the melt, so that the conductive layer 20 can be reliably connected to the melt. For example, the wiring body 10 can be made of aluminum and the conductive layer 20 can be made of copper. Copper has a higher conductivity, while aluminum has a lower density. Therefore, by arranging the terminal 100 as a combination of an aluminum wiring body 10 and a conductive layer 20, the manufacturing cost of the terminal 100 can be reduced, and the overall weight of the terminal 100 can be lightened, while ensuring connection to the melt and external cables. It should be understood that "aluminum" as used herein refers to pure aluminum with an aluminum content higher than 99%.

[0031] The reinforcing structure 30 may be made of a third conductive material with a hardness greater than that of the first conductive material, preferably of the same material as the conductive layer 20, i.e., a material with both higher conductivity and harderness than the first conductive material. For example, both the reinforcing structure 30 and the conductive layer 20 may be made of copper. The reinforcing structure 30 may extend circumferentially around the wiring hole 121 to cover the hole wall of the wiring hole 121, thereby improving the hardness of the surface of the wiring hole 121 used for connecting external cables, thus preventing the terminal 100 from deforming or creeping due to the forces exerted by the external cables during long-term use. Alternatively, the reinforcing structure 30 and the conductive layer 20 may also be constructed of different materials, such as either copper or brass.

[0032] Optionally, as shown in the figure, the reinforcing structure 30 can be designed as a reinforcing sleeve with a U-shaped cross-section that snaps into the wiring hole 121, so as to completely cover the hole wall of the wiring hole 121 and the area of ​​the wiring hole 121 surrounded by the two sides in the thickness direction of the cable connection part 12, thereby maximizing the rigidity of the terminal 100 for supporting the external cable.

[0033] Optionally, the wiring body 10 may be made of aluminum 1060 or aluminum 1070. Aluminum 1060 has a volume conductivity of approximately 61.2% IACS at 20 degrees Celsius, and aluminum 1070 has a volume conductivity of approximately 62% IACS at 20 degrees Celsius. This allows the wiring body 10 made of aluminum to have conductivity and hardness as close as possible to that of the conductive layer 20 made of copper, thereby improving the welding strength between the two.

[0034] Optionally, one of the terminals 100 of the fuse may be provided with a sand-filling hole 40 for filling the arc-extinguishing medium into the fuse tube. As shown in the figure, the fusible element connection portion 11 may be provided with a first through hole extending axially, and the conductive layer 20 may be provided with a second through hole extending axially. The first through hole and the second through hole can be aligned and connected to form the sand-filling hole 40. The thickness of the fusible element connection portion 11, i.e., its axial dimension, is much larger than the thickness of the conductive layer 20, but the first conductive material used to make the fusible element connection portion 11 has relatively low hardness. This allows for easy drilling of holes in the fusible element connection portion 11 while ensuring the electrical and mechanical properties of the terminal 100.

[0035] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0036] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A terminal (100) for a fuse, the fuse further comprising a fuse body, characterized in that, The terminal block (100) includes: The wiring body (10) includes a melt connection part (11) and a cable connection part (12) integrally made of a first conductive material, wherein the melt connection part (11) is arranged adjacent to the melt, and the cable connection part (12) is arranged on the side of the melt connection part (11) facing away from the melt and is provided with a wiring hole (121) for connecting to an external cable. A conductive layer (20) is made of a second conductive material with a conductivity greater than that of the first conductive material and is welded to the side of the melt connection portion (11) facing the melt, so that the melt can be connected to the melt connection portion (11) via the conductive layer (20); A reinforcing structure (30) is made of a third conductive material with a hardness greater than that of the first conductive material and extends circumferentially around the wiring hole (121) so that the reinforcing structure (30) covers the hole wall of the wiring hole (121).

2. The terminal (100) for a fuse according to claim 1, characterized in that The reinforcing structure (30) is constructed as a reinforcing sleeve with a U-shaped cross-section that snaps into the wiring hole (121).

3. The terminal (100) for a fuse according to claim 1, characterized in that The second conductive material used to form the conductive layer (20) and the third conductive material used to form the reinforcing structure (30) are made of the same material.

4. The terminal (100) for a fuse according to claim 3, characterized in that The wiring body (10) is made of aluminum, and the conductive layer (20) and the reinforcing structure (30) are both made of copper.

5. The terminal (100) for a fuse according to claim 4, characterized in that The wiring body (10) is made of aluminum 1060 or aluminum 1070.

6. The terminal (100) for a fuse according to claim 1, characterized in that The melt connection part (11) is provided with a first through hole penetrating the melt connection part (11), and the conductive layer (20) is provided with a second through hole aligned and communicating with the first sand filling hole (40) to form a sand filling hole (40).

7. The terminal (100) for a fuse according to claim 1, characterized in that The melt connection part (11) is constructed as a circular plate structure, and the cable connection part (12) is constructed as a rectangular plate structure.

8. A fuse, characterized by The fuse includes a fusible element and a pair of terminals (100) according to any one of claims 1 to 7, the fusible element being connected to an external cable via the pair of terminals (100).

9. The fuse according to claim 8, characterized in that, The conductive layer (20) is made of the same material as the melt.

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