CN218826939U - Fuse-element with overload and short circuit duplicate protection - Google Patents
Fuse-element with overload and short circuit duplicate protection Download PDFInfo
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- CN218826939U CN218826939U CN202223335429.5U CN202223335429U CN218826939U CN 218826939 U CN218826939 U CN 218826939U CN 202223335429 U CN202223335429 U CN 202223335429U CN 218826939 U CN218826939 U CN 218826939U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to the field of circuit protection, in particular to a fuse melt with overload and short circuit dual protection, wherein at least one waist-shaped hole is formed in the middle area of the fuse melt along the length direction of the fuse melt, and strip-shaped narrow necks are respectively formed on two sides of the waist-shaped hole; a plurality of circular holes are respectively formed in the melt on the two sides of the waist-shaped hole at intervals along the length direction of the melt, and short narrow necks are formed on the two sides of each circular hole; the electrical resistance at the elongated throat is greater than the electrical resistance at the short throat. According to the melt structure, the minimum breaking current of the fuse is reduced by combining the elongated narrow neck with the metallurgical effect point, the protection range of the fuse is enlarged, and the small current breaking capacity of the fuse is improved; the long strip-shaped narrow neck is combined with the short narrow neck, so that the overload and short circuit dual protection of the fuse is realized.
Description
Technical Field
The invention relates to the field of circuit protection, in particular to a fuse protector for circuit protection, and especially relates to a fuse structure for the fuse protector.
Background
The fuse element is a key component of the fuse. The structural design of the fused mass determines the breaking capacity of the fuse. The traditional solution is to uniformly distribute round or diamond necks on a melt, such as the melt for a dc fuse link disclosed in chinese patent 201511008704.4, and the uniform necks formed by uniformly distributed round holes are used to realize the breaking of short circuit current, but the breaking capability of the short circuit current to overload current is not provided.
Chinese patent 2021228964304 discloses a combined melt with strong impact resistance and low-power overload protection capability, wherein the middle of the melt structure is a relatively wide narrow-neck structure, and the other narrow-necks are narrow-necks, and the low-power overload protection is realized by arranging a metallurgical effect point at the middle wide-neck and slowly dissipating heat at the middle part. The resistance of the middle wide narrow-diameter structure in the middle of the patent technology is smaller than that of the other narrow necks, the fusing time of the middle wide narrow-diameter neck of the low-power overload protection is very long, and when the length of the melt is integrally shorter and the heat dissipation of the two ends is fast, the low-power overload protection cannot be realized.
Disclosure of Invention
The invention aims to solve the technical problem of providing a fuse melt with overload and short circuit double protection, wherein local resistance is increased on the fuse melt, and a narrow neck at the position with larger local resistance can be fused when the fuse melt is overloaded, so that the overload and short circuit double protection of the fuse melt is realized.
Aiming at the technical problem, the technical scheme provided by the invention is that the fuse element with overload and short circuit double protection is characterized in that at least one waist-shaped hole is formed in the middle area of the fuse element along the length direction of the fuse element, and strip-shaped narrow necks are respectively formed on two sides of the waist-shaped hole in the width direction; a plurality of circular holes are respectively formed in the melts on the two sides of the waist-shaped hole in the length direction at intervals along the length direction, and short narrow necks are formed on the two sides of each circular hole; the electrical resistance at the elongated throat is greater than the electrical resistance at the short throat.
Preferably, a metallurgical effect layer is arranged on one surface or two surfaces of the kidney-shaped hole or the melt close to the side of the kidney-shaped hole.
Preferably, notches are respectively formed in the melt side edges on two sides of the waist-shaped hole in the width direction, and the bottoms of the notches are parallel to the straight edges of the waist-shaped hole.
Preferably, notches are respectively arranged on the side edges of the melt on the two sides of the circular hole, and the notches are circular arc notches.
According to the melt structure, the minimum breaking current of the fuse is reduced by combining the elongated narrow neck with the metallurgical effect point, the protection range of the fuse is enlarged, and the small current breaking capacity of the fuse is improved; the long strip-shaped narrow neck is combined with the short narrow neck, so that the overload and short circuit dual protection of the fuse is realized.
Drawings
FIG. 1 is a schematic view of the melt structure of the present invention.
Detailed Description
In view of the above technical solutions, preferred embodiments are described in detail with reference to the drawings.
A fuse melt with overload and short circuit double protection, referring to fig. 1, the melt 1 is a strip-shaped sheet structure and is made of conductive metal. Two kidney-shaped holes 2 are arranged at intervals between the central areas of the melt 1 along the length direction. Notches 21 are respectively arranged on two sides of the melt corresponding to the two sides of the width direction of the waist-shaped hole 2, the bottom of each notch 21 is of a plane structure and is parallel to the straight edge of the waist-shaped hole, and the two sides of the bottom are of circular arc structures. An elongated throat 3 is formed between the notch 21 and the waist-shaped aperture 2. One side or two sides of the melt in the area between the central points of the two adjacent kidney-shaped holes 2 are provided with a metallurgical effect layer 4. The material of the metallurgical effect layer 4 is a metal material with a low melting temperature, such as tin.
A plurality of circular holes 5 are respectively arranged on the length of the melt on the two sides of the two kidney-shaped holes 2 at intervals, and the distance between every two adjacent circular holes is the same. Circular arc notches 51 are respectively arranged on two sides of the melt corresponding to the two sides of the circular hole 5. A short narrow neck 6 is formed between the circular arc notch 51 and the circular hole 5.
The resistance of the region where the elongated throat 3 is located is greater than the resistance of the region where the short throat is located.
In fig. 1, two waist-shaped holes are provided to increase the number of the elongated necks and the resistance, or only one waist-shaped hole may be provided as long as the resistance of the region where the elongated necks are formed at the waist-shaped holes is larger than the resistance of the region where the short necks are formed. In fig. 1, the metallurgical effect layer 4 is arranged in the area between the central points of two adjacent kidney-shaped holes 2, and the metallurgical effect layer 4 can also be arranged only in the area of the kidney-shaped holes or on one side or two sides of the melt adjacent to one side of the kidney-shaped holes.
When overload current exists, the resistance of the long strip-shaped narrow neck of the melt is large, the heat productivity is large, the temperature rise is faster than that of the short narrow neck, when the duration of the overload current is long and is generally in the minute level, and when the temperature of the long strip-shaped narrow neck continuously rises to the fusing temperature, the melt is fused from the long strip-shaped narrow neck, so that overload protection is realized. As the metallurgical effect layer is added at the elongated narrow neck, when the temperature rises, the metal of the metallurgical effect layer is firstly melted to generate a metallurgical effect point, so that the fusing of the elongated narrow neck is accelerated, and the overload protection is realized. The fusing time for increasing the metallurgical effect layer is relatively short.
When short-circuit current exists, the short-circuit current is several times or even dozens of times of overload current, the temperature of the narrow neck is increased to fusing temperature within a very short time and millisecond level, and the melt is fused from the narrow neck, so that short-circuit protection is realized.
The fuse element structure realizes overload and short circuit double protection of the fuse element through the combination of the strip-shaped narrow neck and the metallurgical effect point and the short narrow neck.
Claims (4)
1. A fuse melt with overload and short circuit dual protection is characterized in that at least one waist-shaped hole is formed in the middle area of the melt along the length direction of the melt, and strip-shaped narrow necks are formed on two sides of the waist-shaped hole in the width direction respectively; a plurality of circular holes are respectively formed in the melts on the two sides of the waist-shaped hole in the length direction at intervals along the length direction, and short narrow necks are formed on the two sides of each circular hole; the resistance of the elongated throat is greater than the resistance of the short throat.
2. A fuse melt with double overload and short circuit protection according to claim 1, characterised in that a metallurgical effect layer is arranged on one or both sides of the kidney-shaped hole or the melt adjacent to the side of the kidney-shaped hole.
3. A fuse melt with double protection against overloads and short-circuits as claimed in claim 1, wherein notches are respectively formed on the melt sides on both sides in the width direction of the kidney-shaped hole, and the bottoms of the notches are parallel to the straight sides of the kidney-shaped hole.
4. A fuse element with overload and short-circuit protection according to claim 1, wherein notches are formed in the sides of the fuse element on both sides of the circular hole, and the notches are circular arc notches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223335429.5U CN218826939U (en) | 2022-12-12 | 2022-12-12 | Fuse-element with overload and short circuit duplicate protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223335429.5U CN218826939U (en) | 2022-12-12 | 2022-12-12 | Fuse-element with overload and short circuit duplicate protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218826939U true CN218826939U (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223335429.5U Active CN218826939U (en) | 2022-12-12 | 2022-12-12 | Fuse-element with overload and short circuit duplicate protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218826939U (en) |
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2022
- 2022-12-12 CN CN202223335429.5U patent/CN218826939U/en active Active
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