CN110911254A - High-voltage power fuse and manufacturing method thereof - Google Patents
High-voltage power fuse and manufacturing method thereof Download PDFInfo
- Publication number
- CN110911254A CN110911254A CN201911298290.1A CN201911298290A CN110911254A CN 110911254 A CN110911254 A CN 110911254A CN 201911298290 A CN201911298290 A CN 201911298290A CN 110911254 A CN110911254 A CN 110911254A
- Authority
- CN
- China
- Prior art keywords
- fuse
- link
- voltage power
- isolation
- fuse link
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/08—Fusible members characterised by the shape or form of the fusible member
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
- H01H69/02—Manufacture of fuses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/18—Casing fillings, e.g. powder
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/38—Means for extinguishing or suppressing arc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/38—Means for extinguishing or suppressing arc
- H01H2085/388—Means for extinguishing or suppressing arc using special materials
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuses (AREA)
Abstract
The invention provides a high-voltage power fuse, which comprises an insulating shell, an outer electrode, a fuse link and a plurality of isolation belts, wherein the insulating shell is internally provided with an accommodating cavity; the isolation belt is arranged on the fuse link, the isolation belt is arranged between the outer electrode and the adjacent fuse part, the isolation belt is made of flame-retardant materials, and the isolation belt is symmetrically arranged on the upper surface of the fuse link and the lower surface of the fuse link respectively; the invention also provides a manufacturing method of the high-voltage power fuse; the isolation belt is arranged on the fuse link body, so that the diffusion of vaporized metal in electric arcs generated by the fuse links after the fuse links are broken, the electric arcs generated by the fuse links are effectively isolated, and potential safety hazards such as shell breakage, explosion, or combustion caused by arc layers with higher energy formed by continuous extension connection of the electric arcs are avoided; the energy of the electric arc in the fuse shell is dispersed, and the pressure resistance and the safe breaking capacity of the fuse are further improved.
Description
Technical Field
The invention relates to the field of electric protection elements, in particular to a high-voltage power fuse.
Background
The fuse is widely applied to overcurrent protection of various electronic components. The metal conductor is used as a melt to be connected in series in the circuit, when the circuit is abnormal, the melt of the fuse can be automatically melted after the current exceeds a specified value, and the effects of disconnecting the circuit and protecting an electric appliance are achieved.
Electric vehicles, namely electric drive vehicles, are also known as electric drive vehicles. Generally, an electric vehicle is a vehicle that uses a battery as an energy source, and converts electric energy into mechanical energy through a controller, a motor and other components to move so as to control the current and change the speed. Common electric vehicles include single-wheel electric vehicles, two-wheel electric vehicles, three-wheel electric vehicles, four-wheel electric vehicles, and the like. In view of the increase of the application in the electric vehicle, the safety of the electric vehicle and the safety of passengers are directly affected by the safety of the electric circuit. With the increasing of voltage in a circuit and the continuously expanding change of a power system, the existing fuse cannot bear the energy of the increasing of voltage in the fusing process, especially under the condition of overcurrent, the energy accumulated by the continuous extension and overlong time of an electric arc can cause the potential safety hazards of explosion, cracking, burning and the like of a shell where the fuse is located.
To minimize the duration and duration of the arc discharge, a loose arc suppressing material, such as quartz sand, is typically added to the housing in which the fuse is located to absorb the vaporized metal that sustains the arc. However, filling with a loose arc-extinguishing material alone may not be sufficient to extinguish the arc generated within the fuse, nor to block the arc from continuing to spread, especially in the limited housing size of fuses in the field of electric vehicles, higher voltage conditions, etc. Meanwhile, in the application of the electric vehicle, the fuse wire and the loose sand-shaped material can rub against each other to cause the fuse wire to be worn and the fuse wire loses functions under the vibration use environment for a long time.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a high-voltage power fuse with better arc extinguishing performance.
The present invention provides a high voltage power fuse, comprising:
the insulation shell is internally provided with an accommodating cavity;
an outer electrode, at least a portion of the outer electrode being located outside the insulating housing;
the fuse link is electrically connected with the outer electrode and comprises a fusing part, and the fusing part is positioned in the accommodating cavity;
the high-voltage power fuse further comprises a plurality of isolation belts for arc breaking, the isolation belts are arranged on the fuse link, the outer electrodes are close to the isolation belts arranged between the fusing parts, metal diffusion is prevented through the isolation belts, the upper surface of the fuse link and the lower surface of the fuse link are symmetrically arranged respectively on the isolation belts. Fuse-element plate or the fuse-link or the fusing plate that the metal was made of two-sided coating fuse all can produce electric arc at upper surface and lower surface, are in this moment the upper surface of fuse-link with the lower surface of fuse-link all sets up respectively the median ensures that the position that produces electric arc all is separated by the median, promotes disconnected arc efficiency. In some embodiments, the isolation bands of the upper and lower surfaces are symmetrically disposed.
The fuse link is in a sheet shape or a plate shape, and the isolation belt is transversely arranged on the fuse link.
The insulating housing comprises an upper housing, a lower housing, a front plate and a rear plate, wherein the upper housing in a concave shape and the lower housing in the concave shape respectively contain an inner cavity, the upper housing and the lower housing are symmetrically buckled and form an accommodating cavity in a surrounding manner with the front plate and the rear plate, and an outer electrode is arranged between the upper housing and the lower housing.
The outer electrode is provided with a first mounting hole used for being electrically connected with a circuit and two second mounting holes used for fixedly connecting the outer electrode to the insulating shell, the lower shell is provided with a fixing hole matched with the second mounting holes, the outer electrode is fixedly connected with the lower shell through a connecting piece, and the connecting piece can be a rivet.
By providing a separation zone on the fuse link, the arc can be cut off rapidly, minimizing the duration and duration of the arc discharge.
In some embodiments, the fuse link is in the shape of a sheet or a plate, and the isolation belt is transversely disposed on the fuse link. The transverse direction means that the longitudinal direction of the separator intersects with the longitudinal direction of the fuse link. Preferably, the length direction of the separation zone is perpendicular to the length direction of the fuse link.
The length of the isolation belt is not less than the width of the fuse link. Preferably, the length of the isolation band is equal to the width of the fuse link.
In some embodiments, the height of the isolation zone is 5 to 50 times the thickness of the fuse link, and/or the width of the isolation zone is 5 to 60 times the thickness of the fuse link, too wide reducing the diffusion cross section of the metal, which is detrimental to the absorption of metal vapor by the arc suppressant; too narrow may not be sufficient to isolate the conductive strip into separate segments of sufficiently high resistance; if the metal is too low, the diffused metal forms a continuous conductive layer containing high-concentration metal vapor above the isolation belt, and the thickness of the isolation belt is higher than that of the metal diffusion layer at the maximum breaking energy; too high increases the difficulty and cost of processing. By adopting the technical scheme, materials can be reduced on the premise of ensuring the arc extinguishing effect.
The material of the isolation belt for preventing metal diffusion also comprises one or more mixtures of silicon rubber, silicone sealant and room temperature vulcanized silicon rubber. The thermal decomposition temperature of the silicone rubber with the added flame retardant material is significantly higher than that of the silicone resin used in the prior art. By comparing the flame resistance characteristics of different materials with a flame spray gun, the silicone resin is easily decomposed into ash by flame. The silicon rubber containing the flame retardant can bear flame burning for several seconds without pulverization, and can become a high-quality high-temperature metal vapor isolation belt.
In some embodiments, the fuse portion includes a plurality of fuse portion groups arranged in series, each fuse portion group includes one fuse portion or a plurality of fuse portions arranged in parallel, and the isolation strip is arranged between adjacent fuse portion groups, so that the efficiency of cutting off an arc is further improved.
The fuse link can be one, or a plurality of fuse links can be connected in parallel or in series. In some embodiments, the high voltage power fuse includes two or more fuse links arranged in parallel, and each fuse link is provided with the isolation strip. .
In some embodiments, the plurality of fuse links are arranged in parallel from top to bottom, and the sum of the height of the isolation belt located on the lower surface of the upper fuse link and the height of the isolation belt located on the corresponding position of the upper surface of the lower fuse link is not less than the distance between the lower surface of the upper fuse link and the upper surface of the lower fuse link. With this arrangement, it is possible to ensure that the arcs in the space between two adjacent fuse links are completely separated, ensuring that no arc leaks or overflows to the position of the outer electrode at the end.
In some embodiments, the isolation zone located on the lower surface of the upper fuse link interferes with the isolation zone located in the corresponding position on the upper surface of the lower fuse link.
In some embodiments, the outer electrode is plate-shaped, the fuse link includes a first fuse link and a second fuse link that are arranged in parallel, two ends of the first fuse link are respectively and fixedly connected with the upper surface of the outer electrode on two sides, two ends of the second fuse link are respectively and fixedly connected with the lower surface of the outer electrode on two sides, and the isolation strip on the lower surface of the first fuse link is in contact with the isolation strip on the corresponding position on the upper surface of the second fuse link.
In some embodiments, the accommodating cavity is further filled with an arc extinguishing material, and the arc extinguishing material comprises a filler and an adhesive for adhering the filler.
The isolation belt can prevent metal vapor in the electric arc from diffusing to the arc extinguishing material in a local area, and the formation of the electric arc continuously containing high metal content is avoided. Through the arrangement of the isolation belt and the arc extinguishing material containing the adhesive, the arc extinguishing material can absorb metal steam to achieve the aim of arc extinguishing, and a continuous high-metal-steam-concentration high-conductivity layer cannot be formed around the fuse link.
The arc-extinguishing material is a whole body instead of loose particles, so that mechanical friction between the arc-extinguishing material and the fuse wire can be prevented in practical application, and the risk of fuse failure is reduced.
The filler can be one or more of quenching materials such as alumina, silica, quartz sand and the like. The adhesive may be comprised of a flame retardant material, a wetting agent, a binding material, and water. Wherein, the flame retardant material can be one or a mixture of more of nano aluminum hydroxide, nano magnesium hydroxide, melamine and derivatives thereof, dicyandiamide and derivatives thereof, and the like; the wetting agent can be one or more of sodium lauryl sulfate, dihexanol amide, heavy alkylbenzene sulfonate, linear alkylbenzene sulfonate and the like; the binding material may be one or more of aluminum hydroxide sol, silica sol, sodium polysilicate, potassium, sodium silicate, borate, phosphate, etc.
In some embodiments, the arc suppressing material comprises 60-98% by mass of the filler, and 2-32% by mass of the binder. On the premise of ensuring good arc extinguishing/quenching effect, the integrity of the filler is ensured, the phenomenon of looseness is avoided, and the fuse link is prevented from being worn during vibration.
The adhesive comprises a flame-retardant material with the mass fraction of less than or equal to 20%, a wetting agent with the mass fraction of less than or equal to 20%, a binding material with the mass fraction of 10-60% and water.
A method of manufacturing a high voltage power fuse, comprising the steps of:
manufacturing a fuse link body comprising a plurality of fuse part groups connected in series, and respectively covering isolation belts on the upper surface of the fuse link body and the lower surface of the fuse link body symmetrically;
the method comprises the following steps of manufacturing a shell with an inner cavity by using an insulating base material, wherein the shell is concave, two bosses are arranged on two sides of the opening direction of the inner cavity, and the shell comprises an upper shell and a lower shell;
making an external electrode having a first mounting hole for electrical connection to a circuit using a conductive metal;
the two outer electrodes are respectively fixedly connected with the lug bosses of the lower shell through connecting pieces;
respectively connecting two ends of the fuse link with the two outer electrodes, wherein the fuse link is positioned at the corresponding position of the inner cavity;
fixedly connecting the upper shell with the lower shell through a connecting piece to form a main body, wherein the inner cavity of the upper shell and the inner cavity of the lower shell are oppositely arranged to form an accommodating cavity for accommodating the fuse-link;
manufacturing a planar cover plate by using an insulating base material, wherein the cover plate comprises a front plate and a rear plate;
bonding the rear plate with the upper shell and the lower shell respectively through adhesives, wherein the rear plate forms a rear wall of the accommodating cavity;
adding a filler and an adhesive into the accommodating cavity to form a blank, wherein the filler is a quenching material, and the adhesive comprises a flame-retardant material, a wetting agent, a bonding material and water;
heating the blank at a temperature of 80-120 ℃ for 60-300 minutes, wherein the filler and the adhesive are cured to form an integral arc suppressing material;
and respectively bonding the front plate with the upper shell and the lower shell through a bonding agent, wherein the front plate forms the front wall of the containing cavity and seals the containing cavity to manufacture the high-voltage power fuse.
In some preferred embodiments, a plurality of the fuse links connected in parallel are arranged side by side from top to bottom and connected in parallel, and the isolation belt located on the lower surface of the upper fuse link is in contact with the isolation belt located on the corresponding position of the upper surface of the lower fuse link.
The invention has the following beneficial effects:
compared with the prior art, the high-voltage power fuse provided by the invention has the following technical effects:
according to the technical scheme, the isolation belt for preventing metal diffusion is arranged on the fuse link body, so that the diffusion of vaporized metal in electric arcs generated by the fusing parts after fusing can be blocked, the electric arcs generated by the fusing parts are effectively blocked, and the potential safety hazards of shell breakage, explosion, burning and the like caused by the fact that the electric arcs continuously extend and connect to form an arc layer with higher energy are avoided; the energy of the electric arc in the fuse shell is dispersed, and the pressure resistance and the safe breaking capacity of the fuse are further improved. The arc-extinguishing material is a whole body instead of loose particles, so that mechanical friction between the arc-extinguishing material and the fuse wire can be prevented in practical application, and the risk of fuse failure is reduced. In addition, the high voltage power fuse of this application still can be used to equipment such as balance car, fill electric pile, power converter (power conversion) and aerogenerator.
Drawings
Fig. 1 is a schematic perspective view of a high-voltage power fuse according to the present invention;
fig. 2 is a schematic structural diagram of a high-voltage power fuse according to a first embodiment of the invention;
fig. 3 is a schematic diagram of a fuse link structure of a high-voltage power fuse according to a first embodiment of the invention;
FIG. 4 is an X-RAY diagram after the fuse of the first embodiment of the present invention is blown;
fig. 5 is a perspective view of a high voltage power fuse according to a first embodiment of the present invention;
fig. 6 is a schematic structural view of a high-voltage power fuse according to a second embodiment of the present invention;
fig. 7 is a perspective view of a high voltage power fuse according to a second embodiment of the present invention;
FIG. 8 is an X-RAY diagram of a high voltage power fuse in accordance with a second embodiment of the present invention before it is blown;
FIG. 9 is an X-RAY diagram after the fuse of the second embodiment of the present invention is blown;
fig. 10 is a schematic structural view of a high-voltage power fuse according to a third embodiment of the present invention;
fig. 11 is a schematic cross-sectional view of a high-voltage power fuse according to a third embodiment of the present invention;
FIG. 12 is an X-RAY diagram of a high voltage power fuse in accordance with a third embodiment of the present invention before it is blown;
fig. 13 is an X-RAY diagram after the high voltage power fuse of the third embodiment of the present invention is blown.
The invention will be further described with reference to the accompanying drawings and specific embodiments.
Detailed Description
The present invention will be further understood from the specific examples given below, which are not intended to limit the present invention.
Example one
As shown in fig. 1 to 5, the present invention provides a high voltage power fuse, which includes an insulating housing 2, an external electrode 1, a fuse link 6, an isolation band 4 and an arc extinguishing filler 5. Wherein the content of the first and second substances,
insulating housing 2 includes casing, lower casing, front bezel and back plate, wherein, is casing under "concave" type and contains the inner chamber respectively with being "concave" type, the both sides of the opening direction of inner chamber are two bosss, go up the casing and be symmetrical lock with lower casing, and the boss of the corresponding position of two casings is laminated relatively respectively, surrounds formation with front bezel and back plate simultaneously the holding chamber, outer electrode 1 sets up between last casing and lower casing. The upper shell and the lower shell are fixedly connected through a rivet 3.
At least a part of the external electrode 1 is positioned outside the insulating shell 2; the outer electrode is provided with a first mounting hole used for being electrically connected with a circuit and two second mounting holes used for fixedly connecting the outer electrode to the insulating shell, the position of the first mounting hole is positioned outside the insulating shell 2, the lower shell is provided with a fixing hole matched with the second mounting hole, the outer electrode is fixedly connected with the lower shell through a connecting piece, and the connecting piece can be a rivet.
The flaky or tabular fuse link 6 is electrically connected with the outer electrode 1, the fuse link 6 comprises a fusing part 61, and the fusing part 61 with weaker structural strength is positioned in the accommodating cavity. In this embodiment, fuse-link 6 includes the fusing part group of three series connection settings, every fusing part group includes three parallelly connected setting the fusing part, it is adjacent be provided with median 4 between the fusing part group, the setting of median 4 horizontal symmetry is on fuse-link 6's upper surface and lower surface, further promotes the efficiency of cutting off the electric arc. A separation strip 4 is also provided between the outer electrode 1 and the closest fuse link group to prevent the arc from spreading to the position of the outer electrode. The length of the separation zone 4 is equal to the width of the fuse link 6. The material of the metal diffusion preventing separator 4 containing a flame retardant contains one or more of a mixture of silicone rubber, silicone sealant, and room temperature vulcanized silicone.
In this embodiment, the height of the isolation belt 4 is 5 times to 50 times of the thickness of the fuse link 6, and the width of the isolation belt 4 is 5 times to 60 times of the thickness of the fuse link 6, so that the material consumption can be reduced on the premise of ensuring the arc extinguishing effect.
The arc-extinguishing material comprises a filler and a binder for binding the filler.
The arc-extinguishing material is a whole body instead of loose particles, so that mechanical friction between the arc-extinguishing material and the fuse wire can be prevented in practical application, and the risk of fuse failure is reduced.
The filler can be one or more of quenching materials such as alumina, silica, quartz sand and the like. The adhesive may be comprised of a flame retardant material, a wetting agent, a binding material, and water. Wherein, the flame retardant material can be one or a mixture of more of nano aluminum hydroxide, nano magnesium hydroxide, melamine and derivatives thereof, dicyandiamide and derivatives thereof, and the like; the wetting agent can be one or more of sodium lauryl sulfate, dihexanol amide, heavy alkylbenzene sulfonate, linear alkylbenzene sulfonate and the like; the binding material may be one or more of aluminum hydroxide sol, silica sol, sodium polysilicate, potassium, sodium silicate, borate, phosphate, etc.
In this embodiment, the arc suppressing material 5 contains 60 to 98 mass% of the filler and 2 to 32 mass% of the binder.
The adhesive comprises a flame-retardant material with the mass fraction of less than or equal to 20%, a wetting agent with the mass fraction of less than or equal to 20%, a binding material with the mass fraction of 10-60% and water.
The manufacturing method of the high-voltage power fuse of the embodiment comprises the following steps:
manufacturing a fuse link 6 comprising a plurality of fuse part groups connected in series, and symmetrically covering isolation belts 4 on the upper surface of the fuse link 6 and the lower surface of the fuse link 6 respectively, wherein the thickness of the fuse link is 0.15mm, the height of each isolation belt 4 is 1.8mm, and the width of each isolation belt 4 is 1.8 mm;
the method comprises the following steps of manufacturing a shell with an inner cavity by using an insulating base material, wherein the shell is concave, two bosses are arranged on two sides of the opening direction of the inner cavity, and the shell comprises an upper shell and a lower shell;
making an external electrode 1 having a first mounting hole for electrical connection to a circuit using a conductive metal;
the two outer electrodes are respectively and fixedly connected with the lug bosses of the lower shell through connecting pieces, and the connecting pieces can be rivets;
respectively connecting two ends of the fuse link with the two outer electrodes, wherein the fuse link is positioned at the corresponding position of the inner cavity;
fixedly connecting the upper shell with the lower shell through a connecting piece to form a main body, wherein the inner cavity of the upper shell and the inner cavity of the lower shell are oppositely arranged to form an accommodating cavity for accommodating a fuse link 6;
manufacturing a planar cover plate by using an insulating base material, wherein the cover plate comprises a front plate and a rear plate;
bonding the rear plate with the upper shell and the lower shell respectively through adhesives, wherein the rear plate forms a rear wall of the accommodating cavity;
adding a filler and an adhesive into the accommodating cavity to form a blank, wherein the filler is a quenching material, and the adhesive comprises a flame-retardant material, a wetting agent, a bonding material and water; the filler is quartz sand, the mass fraction of the quartz sand is 70-80%, and the adhesive contains a flame-retardant material of nano magnesium hydroxide, a wetting agent of sodium dodecyl benzene sulfonate and a bonding material of sodium polysilicate.
Heating the blank at a temperature of 120 ℃ for 300 minutes, wherein the filler and the adhesive are cured to form an integral arc suppressing material;
and the front plate is respectively bonded with the upper shell and the lower shell through a bonding agent, the front plate forms the front wall of the containing cavity and seals the containing cavity, and the high-voltage power fuse which can be used for electric vehicles, particularly electric vehicles is manufactured.
As shown in FIG. 4, the fuse is tested to be safely fused under a 500VDC voltage/2000A DC power supply, no phenomena of explosion, explosion or burning occur, and an X-ray photograph shows that the isolation strip 4 for preventing metal diffusion effectively blocks and isolates the arc generated when each fused part is fused.
Example two
As shown in fig. 6 to 8, the present embodiment is different from the first embodiment in that the fuse includes two fuses 6 arranged in parallel, and the two fuses are stacked up and down and electrically connected to the external electrodes 1 at both sides through both ends, respectively.
Specifically, the outer electrode 1 is plate-shaped, the fuse link 6 includes a first fuse link and a second fuse link which are arranged in parallel, two ends of the first fuse link are respectively and fixedly connected with the upper surfaces of the outer electrodes 1 on two sides, and two ends of the second fuse link are respectively and fixedly connected with the lower surfaces of the outer electrodes 1 on two sides. The sum of the height of the isolation belt 4 located on the lower surface of the upper fuse link 6 (first fuse link) and the height of the isolation belt 4 located on the corresponding position of the upper surface of the lower fuse link 6 (second fuse link) is not less than the distance between the lower surface of the upper fuse link 6 (first fuse link) and the upper surface of the lower fuse link 6 (second fuse link). In this embodiment, the thickness of the external electrode 1 is the distance between the lower surface of the end of the first fuse and the upper surface of the end of the second fuse. The thickness of the outer electrode 1 is 3.125mm, the height of the isolation strip 4 is 1.6mm, the sum of the heights of the two isolation strips 4 on the lower surface is 3.2mm, which is slightly greater than the thickness of the outer electrode 1, and the isolation strip 4 on the lower surface of the first fuse link is in contact with the isolation strip 4 on the corresponding position of the upper surface of the second fuse link (as shown in fig. 7), so as to prevent various arcs from flying through the middle of the isolation strips. The width of the separator 4 was 2.0mm, and the thickness of the fuse link 6 was 0.15 mm.
The fuse is tested to be safe to fuse, free of flying, cracking, or burning under a 600VDC voltage/2000A DC power supply. As shown in fig. 9, the X-ray photograph shows that the isolation tape for preventing metal diffusion effectively blocks and isolates the arc generated when each fusing part is fused.
EXAMPLE III
As shown in fig. 10 to 12, the present embodiment is different from the second embodiment in that the sum of the thicknesses of the separator 4 inside the two fusible links 6 is smaller than that of the external electrodes 1, so that the inner separator 4 cannot completely cover the external electrodes 1 on both sides.
As shown in FIG. 13, the fuse did not shatter, crack, or burn when tested on a 600 VDC/2000A DC power supply. However, since the total thickness of the isolation strips 4 at the inner sides of the two fuse links 6 is smaller than the thickness of the outer electrode 1, the electric arcs generated at the inner sides of the fusing regions between the two fuse links 6 are connected with each other to form an electric arc chain with larger energy, and the phenomenon of electric arc outer spray leakage occurs, so that safety concerns exist.
The high-voltage power fuse provided by the invention has the advantages that the metal diffusion preventing isolation belt is arranged on the fuse link body, so that the diffusion of vaporized metal in electric arcs generated by the fused parts after fusing can be blocked, the electric arcs generated by the fused parts are effectively blocked, and the potential safety hazards of shell explosion, burning and the like caused by the fact that the electric arcs continuously extend and connect to form a higher-energy electric arc layer are avoided.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention.
Claims (14)
1. A high voltage power fuse, comprising:
the insulation shell is internally provided with an accommodating cavity;
an outer electrode, at least a portion of the outer electrode being located outside the insulating housing;
the fuse link is electrically connected with the outer electrode and comprises a fusing part, and the fusing part is positioned in the accommodating cavity; the method is characterized in that:
the high-voltage power fuse further comprises a plurality of isolation belts for arc breaking, the isolation belts are arranged on the fuse link, the outer electrodes are close to the isolation belts arranged between the fusing parts, the isolation belts are made of flame-retardant materials, and the upper surface of the fuse link and the lower surface of the fuse link are symmetrically arranged on the isolation belts respectively.
2. The high voltage power fuse of claim 1, wherein: the fuse link is in a sheet shape or a plate shape, and the isolation belt is transversely arranged on the fuse link.
3. The high voltage power fuse of claim 2, wherein: the height of the isolation zone is 5 to 50 times the thickness of the fuse link, and/or,
the width of the isolation band is 5 to 60 times the thickness of the fuse link.
4. The high voltage power fuse of claim 1, wherein: the material of the isolation belt also comprises one or a mixture of more of silicon rubber, silicone sealant and room temperature vulcanized silica gel.
5. The high voltage power fuse of claim 1, wherein: the fusing part comprises a plurality of fusing part groups arranged in series, each fusing part group comprises one fusing part or a plurality of fusing parts arranged in parallel, and the isolating belts are arranged between the fusing part groups.
6. A high voltage power fuse as claimed in any one of claims 1 to 5, wherein: the high-voltage power fuse comprises a plurality of fuse links arranged in parallel, and each fuse link is provided with the isolation belt.
7. The high voltage power fuse of claim 6, wherein: the fuse links are arranged in parallel from top to bottom, and the sum of the height of the isolation belt positioned on the lower surface of the fuse link above and the height of the isolation belt positioned on the corresponding position of the upper surface of the fuse link below is not less than the distance between the lower surface of the fuse link above and the upper surface of the fuse link below.
8. The high voltage power fuse of claim 7, wherein: the isolation belt positioned on the lower surface of the fuse link above is abutted against the isolation belt positioned on the corresponding position of the upper surface of the fuse link below.
9. The high voltage power fuse of claim 7, wherein: the outer electrode is platy, the fuse-link includes parallelly connected first fuse-link and the second fuse-link that sets up, the both ends of first fuse-link respectively with both sides the upper surface fixed connection of outer electrode, the both ends of second fuse-link respectively with both sides the lower surface fixed connection of outer electrode, the median of the lower surface of first fuse-link with the corresponding position of the upper surface of second fuse-link the median offsets.
10. A high voltage power fuse as claimed in any one of claims 1 to 5 and 7 to 9, wherein: arc extinguishing materials are further filled in the accommodating cavity, and the arc extinguishing materials comprise fillers and adhesives used for bonding the fillers.
11. The high voltage power fuse of claim 10, wherein: the arc-extinguishing material contains 60-98% of the filler by mass fraction and 2-32% of the binder by mass fraction.
12. The high voltage power fuse of claim 10, wherein: the adhesive comprises a flame-retardant material with the mass fraction of less than or equal to 20%, a wetting agent with the mass fraction of less than or equal to 20%, a binding material with the mass fraction of 10-60% and water.
13. A method of manufacturing a high voltage power fuse, comprising the steps of:
manufacturing a fuse link body comprising a plurality of fuse part groups connected in series, and respectively covering isolation belts on the upper surface of the fuse link body and the lower surface of the fuse link body symmetrically;
the method comprises the following steps of manufacturing a shell with an inner cavity by using an insulating base material, wherein the shell is concave, two bosses are arranged on two sides of the opening direction of the inner cavity, and the shell comprises an upper shell and a lower shell;
making an external electrode having a first mounting hole for electrical connection to a circuit using a conductive metal;
the two outer electrodes are respectively fixedly connected with the lug bosses of the lower shell through connecting pieces;
respectively connecting two ends of the fuse link with the two outer electrodes, wherein the fuse link is positioned at the corresponding position of the inner cavity;
fixedly connecting the upper shell with the lower shell through a connecting piece to form a main body, wherein the inner cavity of the upper shell and the inner cavity of the lower shell are oppositely arranged to form an accommodating cavity for accommodating the fuse-link;
manufacturing a planar cover plate by using an insulating base material, wherein the cover plate comprises a front plate and a rear plate;
bonding the rear plate with the upper shell and the lower shell respectively through adhesives, wherein the rear plate forms a rear wall of the accommodating cavity;
adding a filler and an adhesive into the accommodating cavity to form a blank, wherein the filler is a quenching material, and the adhesive comprises a flame-retardant material, a wetting agent, a bonding material and water;
heating the blank at a temperature of 80-120 ℃ for 60-300 minutes, wherein the filler and the adhesive are cured to form an integral arc suppressing material;
and respectively bonding the front plate with the upper shell and the lower shell through a bonding agent, wherein the front plate forms the front wall of the containing cavity and seals the containing cavity to manufacture the high-voltage power fuse.
14. The method of claim 13, wherein a plurality of the fuse links connected in parallel are arranged side by side from top to bottom, and the isolation strip located on the lower surface of the upper fuse link is in contact with the isolation strip located on the corresponding position on the upper surface of the lower fuse link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911298290.1A CN110911254A (en) | 2019-12-17 | 2019-12-17 | High-voltage power fuse and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911298290.1A CN110911254A (en) | 2019-12-17 | 2019-12-17 | High-voltage power fuse and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110911254A true CN110911254A (en) | 2020-03-24 |
Family
ID=69825842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911298290.1A Pending CN110911254A (en) | 2019-12-17 | 2019-12-17 | High-voltage power fuse and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110911254A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114464509A (en) * | 2022-02-25 | 2022-05-10 | 中国振华集团云科电子有限公司 | Surface-mounted thick film fuse structure and manufacturing method thereof |
-
2019
- 2019-12-17 CN CN201911298290.1A patent/CN110911254A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114464509A (en) * | 2022-02-25 | 2022-05-10 | 中国振华集团云科电子有限公司 | Surface-mounted thick film fuse structure and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5416835B2 (en) | Current fuse device and battery assembly including the same | |
| EP3149759B1 (en) | Compact high voltage power fuse | |
| EP3304619B1 (en) | Battery connector, battery module and electric vehicle | |
| US11075048B2 (en) | Compact high voltage power fuse and methods of manufacture | |
| WO2019001192A1 (en) | Battery cover plate assembly, single cell battery, battery module, power battery pack, and electric car | |
| US8133608B2 (en) | Battery pack with cell-level fusing | |
| KR102500622B1 (en) | high voltage fuse | |
| CN102959762A (en) | Thermal decoupling of battery cells in the event of a fault | |
| CN110911254A (en) | High-voltage power fuse and manufacturing method thereof | |
| CN114556677A (en) | Battery system | |
| CN211045362U (en) | High-voltage power fuse | |
| CN109661712B (en) | Solderless surface mount fuse link | |
| CN104715982B (en) | Foam fuse filler and tubular fuse | |
| CN113067068A (en) | Vehicle battery | |
| US20200168424A1 (en) | Fuses, Vehicle Circuit for Electric Vehicle and Electric Vehicle | |
| EP3869531B1 (en) | High-voltage fusing apparatus | |
| US10756391B2 (en) | Method and system for secondary internal current mechanisms for a lithium-ion cell | |
| CN115910722A (en) | Fuse with independent arc extinguishing cavity | |
| US11183353B2 (en) | Fuses, vehicle circuit for electric vehicle and electric vehicle | |
| CN213635885U (en) | Fuse and battery module | |
| CN219534787U (en) | Fireproof structure, battery pack and power utilization device | |
| CN214625319U (en) | Large module series copper bar short circuit protection structure | |
| CN217521938U (en) | Fuse protector | |
| US20230378566A1 (en) | Secondary Battery and Secondary Battery Module Including the Same | |
| CN117253762A (en) | High-voltage-resistant and high-breaking-resistance fuse structure and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |