Circuit protection element resistant to high currents

Abstract

This invention discloses a circuit protection element capable of withstanding large currents, which has a conductive fuse installed in a housing. The conductive fuse includes a fusible link and two conductive links. The fusible link is disposed between the conductive links, and the thickness of the fusible link is less than the thickness of the conductive links. The fusible link has two fusing portions. By using the thicker conductive links to increase the cross-sectional area, a low resistance value is generated. Furthermore, the arrangement of the two fusing portions achieves the effect of current shunting. Therefore, the circuit protection element of this invention can withstand larger currents.

Description

Technical Field

[0001] This invention relates to a protective element, and more particularly to an electronic component for use in circuits, which provides circuit safety by producing a fusing effect in the event of overcurrent. Background Technology

[0002] In response to technological advancements, many devices utilizing high currents have emerged, such as energy storage devices used with renewable energy sources or battery packs for electric vehicles, which require rapid charging or discharging when needed. Similarly, artificial intelligence (AI) computing devices consume large currents during high-speed computation. Most existing surface-mount circuit protection components can only withstand currents up to 100 amps, while the aforementioned high-current devices often require 150 amps or even higher. Therefore, developing circuit protection components capable of withstanding high currents is urgently needed. Summary of the Invention

[0003] In view of the aforementioned needs of the prior art, the object of the present invention is to provide a circuit protection element that can withstand large currents, namely, currents of 150 amperes or more.

[0004] To achieve the aforementioned objectives, the present invention provides a circuit protection element comprising:

[0005] A shell having an opening and an internal space;

[0006] A conductive fuse is inserted into the opening of the housing and includes a fusible link and two conductive links. The fusible link is connected between the conductive links. The thickness of the fusible link is less than the thickness of the conductive links. The fusible link is located in the internal space of the housing. The conductive links extend from the internal space of the housing out of the housing from the opening.

[0007] A cover that fits over the opening of the housing;

[0008] A colloid that covers the cover.

[0009] The fusible link includes two connecting portions and two fusible portions. The connecting portions are respectively connected to corresponding conductive sheets, and the fusible portions are connected between the connecting portions so that the fusible portions and the connecting portions surround a central hole.

[0010] The fused piece and the conductive piece are not integrally formed but interconnected.

[0011] The fused piece and the conductive piece are integrally formed.

[0012] The fuse and the conductive sheet are made of the same material.

[0013] The fuse and the conductive sheet are made of different materials.

[0014] The housing includes four side walls and a bottom wall. The four side walls extend vertically from the four sides of the bottom wall to form the internal space and the opening relative to the bottom wall.

[0015] The housing includes two opposing first sides and two opposing second sides, with the first and second sides being adjacent and connected. Four positioning blocks are provided in the internal space, with each positioning block located at the junction of the adjacent first and second sides. Each positioning block has a short wall and a long wall, with the short wall arranged along the corresponding first side and the long wall arranged along the corresponding second side. Partial edges of each conductive sheet abut against the short walls of the corresponding positioning blocks.

[0016] The conductive sheets are respectively attached to the corresponding sidewalls of the housing and extend outside the housing.

[0017] The interior space of the shell is filled with explosion-proof material.

[0018] The advantage of this invention is that by using a thicker conductive sheet to increase the cross-sectional area, the resistance value is reduced, and overall the circuit protection element of this invention can withstand a larger current.

[0019] Furthermore, the fuse includes two connecting portions and two fusing portions. The connecting portions are respectively connected to corresponding conductive sheets, and the fusing portions span between the connecting portions, so that the fusing portions and the connecting portions surround a central hole. By providing two fusing portions, a current-shunting effect is generated when current passes through the conductive fuse, which can further improve the ability of the circuit protection element of the present invention to withstand larger currents.

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is an exploded view of some components of the present invention;

[0023] Figure 3 This is a side cross-sectional view of the present invention;

[0024] Figure 4 This is a top view of some components of the present invention;

[0025] Figure 5 This is a perspective view of the conductive fuse of the present invention;

[0026] Figure 6 A perspective view of a conductive fuse according to another embodiment of the present invention;

[0027] Figure 7 This is a side cross-sectional view of another embodiment of the present invention;

[0028] Figure 8 This is a top view of some components in the usage state of the present invention.

[0029] In the attached figures, the following labels are used:

[0030] 10: Shell 101: Sidewall

[0031] 102: Bottom wall 11: Interior space

[0032] 12: Opening 13: First side

[0033] 14: Second side 15: Positioning block

[0034] 151: Short wall 152: Long wall

[0035] 20, 20A: Conductive fuse; 21, 21A: Fuse clip

[0036] 211: Connecting part; 212: Fusible part

[0037] 213: Center hole; 22, 22A: Conductive sheet

[0038] 30: Cap 40: Sealing compound

[0039] 50: Explosion-proof materials Detailed Implementation

[0040] The following, in conjunction with the accompanying drawings and embodiments of the invention, further illustrates the technical means employed by the invention to achieve its intended purpose. The drawings have been simplified for illustrative purposes only, and the structure or method of the invention is explained by describing the relationship between the elements and components of the invention. Therefore, the elements shown in the drawings are not presented in actual quantity, shape, size, or proportion. The size or proportion has been enlarged or simplified to provide a better illustration. The actual quantity, shape, or proportion has been selectively designed and configured, and the detailed element layout may be more complex.

[0041] Please see Figure 1 and Figure 2 As shown, the present invention includes a housing 10, a conductive fuse 20, a cover 30, and a sealing adhesive 40.

[0042] The aforementioned housing 10 includes an internal space 11 and an opening 12. In one embodiment, the housing 10 includes four side walls 101 and a bottom wall 102. The four side walls 101 extend vertically from the four sides of the bottom wall 102, forming the internal space 11 and the opening 12 relative to the bottom wall 102. In one embodiment, the housing 10 includes two opposing first sides 13 and two opposing second sides 14. The first sides 13 and the second sides 14 are adjacent and connected. Four positioning blocks 15 are provided in the internal space 11. The positioning blocks 15 are located at the four corners of the internal space 11, that is, each positioning block 15 is located at the junction of an adjacent first side 13 and a second side 14. Each positioning block 15 has a short wall 151 and a long wall 152. The short wall 151 is provided along the corresponding first side 13, and the long wall 152 is provided along the corresponding second side 14.

[0043] Please see Figures 2 to 4 As shown, the aforementioned conductive fuse 20 passes through the opening 12 of the housing 10 and includes a fusible link 21 and two conductive plates 22. The fusible link 21 connects between the conductive plates 22, and the thickness of the fusible link 21 is less than the thickness of the conductive plates 22. The fusible link 21 is disposed in the internal space 11 of the housing 10. The conductive plates 22 extend from the internal space 11 of the housing 10 out of the housing 10 from the opening 12. The fusible link 21 includes two connecting portions 211 and two fusing portions 212. The connecting portions 211 are respectively connected to the corresponding conductive plates 22, and the fusing portions 212 span between the connecting portions 211, so that the fusing portions 212 and the connecting portions 211 surround a central hole 213. In one embodiment, the conductive plates 22 respectively abut against the corresponding sidewalls 101 of the housing 10 and extend out of the housing 10. In one embodiment (e.g.) Figure 5 As shown), the fuse 21 and the conductive sheet 22 are not integrally formed but connected to each other (e.g., connected by welding); in another embodiment (e.g. Figure 6 As shown in the diagram, the fuse element 21A and the conductive sheet 22A of the conductive fuse 20A are integrally formed. In one embodiment, a portion of the edge of each conductive sheet 22 abuts against the short wall 151 of the corresponding positioning block 15, thereby allowing the conductive fuse 20 to be partially inserted into the internal space 11 of the housing 10 by aligning the edges of the conductive sheets 22 with the short walls 151 of the corresponding positioning blocks 15 during assembly, thus improving assembly convenience. Generally, the conductive fuse 20, when not assembled, appears as follows: Figure 5 As shown in the flat state, the conductive sheet 22 will be bent into a flat shape during assembly. Figures 1 to 4The state shown. In one embodiment, the conductive fuse 20 is made of metals such as silver, copper, nickel, tin, aluminum, zinc, or their alloys; in another embodiment, the conductive fuse 20 is made of silver or copper; in yet another embodiment, the fuse element 21 and the conductive element 22 are made of different materials; in yet another embodiment, the fuse element 21 and the conductive element 22 are made of the same material.

[0044] The aforementioned cover 30 covers the opening 12 of the housing 10 to enclose the fuse element 21 of the conductive fuse 20 within the internal space 11 of the housing 10. In one embodiment, the cover 30 is made of ceramic or plastic. In one embodiment (e.g.) Figure 7 As shown, first, explosion-proof material 50 is filled into the internal space 11, and then the cover 30 is placed over it. The explosion-proof material 50 is used to eliminate the electric arc that may be caused by the instantaneous high heat generated when the fuse 21 begins to melt due to excessive current. In one embodiment, the explosion-proof material 50 is made of materials such as quartz sand, explosion-proof sand, ceramic sand, glass fiber, or flame retardant. The flame retardant may be made of materials such as melamine, magnesium hydroxide, or aluminum hydroxide.

[0045] The aforementioned sealant 40 covers the cover 30. In one embodiment, the sealant 40 is made of materials such as silicone, epoxy resin, nylon, or engineering plastics.

[0046] Please see Figure 4 and Figure 8 As shown, in use, the circuit protection element of the present invention is connected in series at the required position in the circuit, and forms an electrical connection with the corresponding electronic component through the conductive sheet 22. When a current exceeding the load passes through, the fuse part 212 melts to break the circuit, thereby achieving the effect of protecting the circuit. Because the conductive sheet 22 is relatively thick, its cross-sectional area is large, which effectively reduces the resistance value. Furthermore, the fuse part 212 has a design with two fuse parts 212, which also allows the current to be diverted when it passes through. Overall, the circuit protection element of the present invention can withstand a large current.

[0047] The above description is merely an embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above by way of embodiment, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

[0048] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the claims of the present invention.

Claims

1. A circuit protection element, characterized in that, include: A shell having an opening and an internal space; A conductive fuse is inserted into the opening of the housing and includes a fusible link and two conductive links. The fusible link is connected between the conductive links. The thickness of the fusible link is less than the thickness of the conductive links. The fusible link is located in the internal space of the housing. The conductive links extend from the internal space of the housing out of the housing from the opening. A cover that fits over the opening of the housing; A colloid that covers the cover.

2. The circuit protection element according to claim 1, characterized in that, The fuse includes two connecting portions and two fusible portions. The connecting portions are respectively connected to corresponding conductive sheets, and the fusible portions are connected between the connecting portions so that the fusible portions and the connecting portions surround a central hole.

3. The circuit protection element according to claim 1 or 2, characterized in that, The fuse and the conductive sheet are not integrally formed but are connected to each other.

4. The circuit protection element according to claim 1 or 2, characterized in that, The fuse and the conductive sheet are integrally formed.

5. The circuit protection element according to claim 1 or 2, characterized in that, The fuse and the conductive sheet are made of the same material.

6. The circuit protection element according to claim 1 or 2, characterized in that, The fuse and the conductive sheet are made of different materials.

7. The circuit protection element according to claim 1 or 2, characterized in that, The housing includes four side walls and a bottom wall. The four side walls extend vertically from the four sides of the bottom wall to form the internal space and the opening relative to the bottom wall.

8. The circuit protection element according to claim 7, characterized in that: The housing includes two opposing first sides and two opposing second sides, with the first sides and the second sides being adjacent and connected. Four positioning blocks are provided in the internal space, with the positioning blocks located at the junction of the adjacent first and second sides respectively. Each positioning block has a short wall and a long wall, with the short wall arranged along the corresponding first side and the long wall arranged along the corresponding second side. A portion of the edge of each conductive sheet abuts against the short wall of the corresponding positioning block.

9. The circuit protection element according to claim 7, characterized in that, The conductive sheets are respectively attached to the corresponding sidewalls of the housing and extend outside the housing.

10. The circuit protection element according to claim 8, characterized in that, The conductive sheets are respectively attached to the corresponding sidewalls of the housing and extend outside the housing.

11. The circuit protection element according to claim 1 or 2, characterized in that, The interior space of the enclosure is filled with explosion-proof material.

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