CN208753250U - A kind of novel electric car fuse - Google Patents

Abstract

The utility model provides a kind of novel electric car fuse, including shell and it is contained in the first insulating body and the second insulating body of the shell, one right copper bar is across the side wall of shell and the second insulating body and protrudes into the first insulating body, one left copper bar passes through the side wall of shell and protrudes into the first insulating body, left copper bar and right copper bar are connected with each other in the first insulating body by cut-off device, the telemetry circuit including Hall sensor and firing circuit is equipped in second insulating body, Hall sensor is connected with firing circuit, when Hall sensor monitors that the electric current on right copper bar reaches preset value, the cut-off device is ignited in firing circuit electric discharge to be made to open a way between right copper bar and left copper bar, positioned at the intracorporal part of shell, left copper bar is the exposing portion being emerging in outside first insulating body, one left sealant is fixedly arranged on the bottom wall of shell, it is aobvious Dew portion is fixed by left sealant, and left sealant is supported the first insulating body and the second insulating body and made between them with gap.

Description

A kind of novel electric car fuse

Technical field

The utility model relates to automobile equipment technical fields, more particularly to a kind of novel electric car fuse.

Background technique

With the development of electric car, power system capacity is increased rapidly, and voltage rating reaches upper kV grades, and short circuit current can It is more next high to the Structural Design Requirement of fuse up to kA grades upper.But the general volume of fuse of electric vehicle is larger at present, is not inconsistent Close the development trend of list miniaturization of components.And when the fuse of electric vehicle is breaking due to fusing at present, due to electric before open circuit It flows larger, electric arc can be generated, to cause huge security risk.

Utility model content

In view of this, the embodiments of the present invention provide a kind of compact-sized, higher novel electricity of safety coefficient Electrical automobile fuse.

The embodiments of the present invention provide a kind of novel electric car fuse, including shell and are contained in the shell The first insulating body and the second insulating body of body and mutual left and right settings, a right copper bar pass through the right sidewall of the shell With second insulating body and protrude into first insulating body, a left copper bar passes through the left side side wall of the shell and stretches Enter in first insulating body, the left copper bar and the right copper bar are mutual by cut-off device in first insulating body Connection, is equipped with telemetry circuit in second insulating body, and the telemetry circuit includes Hall sensor and firing circuit, described Hall sensor is connected with the firing circuit, when the Hall sensor monitors that the electric current on the right copper bar reaches default When value, the cut-off device is ignited in the firing circuit electric discharge to be made to open a way between the right copper bar and the left copper bar, is located at described The intracorporal part of the shell left copper bar is exposing portion, and the exposing portion is emerging in outside first insulating body, a left sealant It is fixedly arranged on the bottom wall of the shell, the exposing portion is fixed by left sealant, and the left sealant supports first insulation Ontology and second insulating body make have gap between first insulating body and second insulating body.

Further, arc extinguishing fuse is equipped in second insulating body, the arc extinguishing fuse is by conducting wire and includes institute The lines in parallel of left copper bar, the cut-off device and the right copper bar is stated, the arc extinguishing fuse is monolithic melt, in the cut-off device Before being detonated, the route where the arc extinguishing fuse is by the route where the left copper bar, the cut-off device and the right copper bar Short circuit.

Further, one end that the right copper bar protrudes into first insulating body offers through-hole, first insulation Accommodating space and slideway are equipped in ontology, the cut-off device includes the sequentially connected fire positioned at the accommodating space from top to bottom Work product, the piston positioned at the slideway, the lower end for cut-offfing grid, the covering through-hole that is located at least partially within inside the through-hole Silver strip and the copper-base below through-hole, there is the columnar part that upwardly extends, institute in the left copper bar of the enclosure interior The upper/lower terminal for stating copper-base is separately connected the top of the silver strip and the columnar part, and the grid of cut-offfing is insulator, described When firing circuit electric discharge is ignited the priming system and is detonated, the piston is severed along cut-offfing grid described in the slideway movement progress The silver strip disconnects the connection between the columnar part and the right copper bar.

Further, the cut-off device further includes the arc extinguishing washer with the perforation through its upper/lower terminal, the copper-base Have in the perforation and between the circle wall of the arc extinguishing washer and allow bit space, the arc extinguishing washer is by the columnar part Upper end support, the lower end for cut-offfing grid is concave up to be equipped with container, and the cell wall of the container is to cut-off wall, the receipts Tank and the copper-base are cylinder, and the outer diameter of the container is less than or equal to the internal diameter of the perforation, and the receipts The internal diameter of tank is greater than the diameter of the copper-base, described when cut-offfing grid and severing the silver strip, and described cut-off allows described in wall insertion The bit space and copper-base protrudes into the container；The edge that the silver strip is supported in the upper end of the arc extinguishing washer makes the silver strip Edge be close to the right copper bar, the arc extinguishing washer includes several annular grid of mutual stack in the vertical direction, described Annular grid is insulating materials.

Further, the left copper bar further includes left interconnecting piece be emerging in outside the shell and horizontally disposed, described Exposing portion is horizontally disposed and connects the left interconnecting piece and the columnar part, and the columnar part is column structure, perpendicular to institute It states exposing portion and protrudes into first insulating body, the diameter of the cross section of the columnar part is greater than the interior of the annular grid Diameter and the outer diameter for being less than the annular grid.

Further, the left sealant includes left vertical portion interconnected and left horizontal part, the left vertical portion Height is greater than the height of the left horizontal part, and the lower surface of first insulating body includes the upper surface phase with the exposing portion The first contact surface mutually contacted and the second contact surface to contact with each other with the left vertical portion, the right side of the exposing portion are located at The right of the columnar part and right side of the exposing portion is supported by the left side of the left vertical portion, under the exposing portion Surface is supported by the left horizontal part, and second insulating body is supported in the right side of the left vertical portion.

Further, the right copper bar is Z-type, the right interconnecting piece including being emerging in outside the shell and insertion described first The right parallel portion of insulating body and second insulating body further includes connecting hanging down for the right parallel portion and the right interconnecting piece Straight portion, the vertical component effect are emerging in outside second insulating body and are located in the shell；The shell is additionally provided with right sealing Glue, the right sealant include right horizontal part interconnected and right vertical portion, and the right horizontal part is filled in described second absolutely Between the lower surface of edge ontology and the bottom wall of the shell, the right vertical portion be filled in the left side of the vertical component effect with it is described Between second insulating body right side.

Further, the roof of the shell and the middle area of the upper surface are supported in the upper surface of second insulating body Domain is recessed fluted downwards, and the telemetry circuit is distributed on circuit board, and the circuit board is located at the upper area of the groove, The Hall sensor is contained in the lower end area of the groove and the circuit board is fixed in the upper end of the Hall sensor Lower surface, fixed plate is equipped between the upper surface of the circuit board and the roof of the shell, the volume of the groove is greater than The volume of the Hall sensor and make between the Hall sensor and the cell wall of the groove have gap, the circuit board Cross section be less than the cross section of the groove and make to have between the circuit board and the cell wall of the groove gap, described the There is gap, the right side of the vertical component effect and the shell between the right side of two insulating bodies and the right side inner wall of the shell There is gap between the right side inner wall of body.

Further, priming system cover board, institute are equipped between the roof of the shell and the upper end of first insulating body The upper end for stating accommodating space is open open end, and the priming system cover board is blinded by the part open end.

Further, one end that the right copper bar protrudes into first insulating body offers two fixation holes, two fixed spiral shells The right copper bar is fixed on first insulating body by two fixation hole by bolt, and two fixation hole is symmetrically set to The opposite sides of the through-hole.

The technical solution that the embodiments of the present invention provide has the benefit that

(1) first insulating body and second insulating body are integrated in the shell, the right copper bar and institute Left copper bar is stated to connect by the cut-off device, it is compact-sized, it can effectively reduce described in the utility model novel electronic The volume of automobile fuse；

(2) the arc extinguishing fuse passes through conducting wire and the route comprising the left copper bar, the cut-off device and the right copper bar Parallel connection, before the cut-off device is detonated, route where the arc extinguishing fuse is by the left copper bar, the cut-off device and described Line short where right copper bar, so that being detonated in the cut-off device leads to open circuit between the right copper bar and the left copper bar When, the heavy current in novel electric car fuse described in the utility model flows to the route where the arc extinguishing fuse, It eliminates the high voltage between the right copper bar and the left copper bar by shunting, reduces and even eliminate the right copper bar and described Electric arc between left copper bar, when heavy current flows through the arc extinguishing fuse, the arc extinguishing fuse is blown, thus while arc extinguishing Keep novel electric car fuse described in the utility model thoroughly breaking, improves safety coefficient；

(3) cut-off device inherently has arc extinguishing attribute, with the arc extinguishing fuse coordination, improves arc extinguishing index.

(4) it is equipped with left sealant and right sealant in the shell, keeps the left copper bar solid by the caking property of sealant Due to the shell, the right copper bar is made to be fixed on second insulating body, on the one hand, to keep structure lighter and handier, another party Left sealant described in face and the right sealant because have the effects that vibration proof and sound insulation, it is heat-insulated due to be detonated the cut-off device When explode shock wave involve range and it is external involve intensity and all can greatly reduce, it is practical new that this can greatly be improved The safety in utilization and the feature of environmental protection of novel electric car fuse described in type.

(5) structure is simple, easy to use, meets following development trend.

Detailed description of the invention

Fig. 1 is the schematic diagram of the novel electric car fuse of the utility model；

Fig. 2 is the different schematic diagram of labeling position at that time identical as Fig. 1.

Specific embodiment

It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer Type embodiment is further described.

Fig. 1 and Fig. 2 are please referred to, it includes shell that the embodiments of the present invention, which provide the novel electric car fuse of one kind, Body 1 and the first insulating body 8 and the second insulating body 9 that be contained in the shell 1 and mutual left and right settings.The shell 1, First insulating body 8 and second insulating body 9 are made of insulating material.The embodiments of the present invention provide A kind of novel electric car fuse further include respectively from a left side and from the left copper bar 3 and right copper bar 2 of the right insertion shell 1, The left copper bar 3 and the right copper bar 2 are connected with each other by the cut-off device being set in first insulating body 8.The shell 1 Generally hexagonal, there are six side walls for tool.

The right copper bar 2 is Z-type, including right interconnecting piece 21, vertical component effect 22 and right parallel portion 23, wherein described right parallel Portion 23 and the right interconnecting piece 21 are setting up and down and be parallel to each other, and the vertical component effect 22 connects the right interconnecting piece 21 by arc With the right parallel portion 23, and the vertical component effect 22 is perpendicular to the right parallel portion 23.The right interconnecting piece 21 is emerging in described The right hand external of shell 1, for connecting with external circuitry, the right parallel portion 23 and the vertical component effect 22 are respectively positioned on the shell Inside 1, and the right parallel portion 23 continues to extend up through described first to the left after second insulating body 9 to the left Insulating body 8 and the inner left wall for contradicting the shell 1.

Right sealant 72 is equipped in the shell 1, the right sealant 72 includes that right horizontal part interconnected and the right side are perpendicular Straight portion, the right horizontal part are filled between the lower surface of second insulating body 9 and the bottom wall of the shell 1, the right side Vertical portion is filled between the left side of the vertical component effect 22 and the right side of second insulating body 9.The right sealant 72 have caking property, while supporting the second insulating body 9, moreover it is possible to be fixed on second insulating body 9 described The bottom wall of shell 1, and the vertical component effect 22 is fixed on to the right side of second insulating body 9, to keep structure more steady It is fixed.

The roof of the shell 1 is supported in the upper surface of second insulating body 9 and the intermediate region of the upper surface is downward Recessed fluted 91, the upper area of the groove 91 is horizontal circuit board 6, and the circuit board 6 is horizontally placed on the groove 91 The middle at end, and its cross section makes the cell wall of the circuit board 6 and the groove 91 less than the cross section of the groove 91 Between there is gap, the upper surface of the circuit board 6 is fixed on the roof of the shell 1, the circuit board 6 by fixed plate 92 Upper to have telemetry circuit, the telemetry circuit includes Hall sensor 61 and firing circuit, and the firing circuit is distributed in described Circuit board 6, the Hall sensor 61 is contained in the lower end area of the groove 91 and the upper end of the Hall sensor 61 is solid Due to the lower surface of the circuit board 6.The groove 91 is located at the top of the right parallel portion 23, and the Hall sensor 61 is logical Hall sensing is crossed to monitor the size for the electric current for flowing through the right copper bar 2, the Hall sensor 61 and the firing circuit connect It connects, the firing circuit is connect by conducting wire or arresting element with the cut-off device, when the Hall sensor 61 monitors Electric current on the right copper bar 2 reaches preset value perhaps when being more than preset value, and the firing circuit passes through conducting wire or electric discharge member Part electric discharge makes to open a way between the right copper bar 2 and the left copper bar 3 to ignite the cut-off device.

Arc extinguishing fuse 5 is additionally provided in second insulating body 9, the arc extinguishing fuse 5 is by conducting wire and includes the left side The lines in parallel of copper bar 3, the cut-off device and the right copper bar 2, the arc extinguishing fuse 5 are monolithic melt, have certain electricity Resistance, before the cut-off device is detonated, route where the arc extinguishing fuse 5 is by the left copper bar 3, the cut-off device and described Line short where right copper bar 2, or it is considered as open circuit because resistance value is excessive.

One end that the right parallel portion 23 protrudes into first insulating body 8 offers through-hole and two fixation holes, and two is fixed The right copper bar 2 is fixed on first insulating body 8 by two fixation hole by bolt 24, and two fixation hole is symmetrical The opposite sides set on the through-hole, the right parallel portion 23 is fixed on the fixing bolt 24 by the fixation hole First insulating body 8, when the cut-off device is detonated, the right parallel portion 23 will not because the cut-off device explosion and It moves and occurs moving position, and cause the cut-off device that cannot normally disconnect the company between the right copper bar 2 and the left copper bar 3 It connects.

The left copper bar 3 includes being emerging in outside the shell 1 and horizontally disposed left interconnecting piece 31, further includes being located at institute State exposing portion 32 and columnar part 33 inside shell 1 and interconnected.The left interconnecting piece 31 and right 21 phase of interconnecting piece It is mutually parallel, also for being connect with external circuitry.The exposing portion 32 is located at the lower end of first insulating body 8 and manifests institute The first insulating body 8 is stated, the columnar part 33 is column structure, perpendicular to the exposing portion 32 and extends upwardly into described first In insulating body 8, the columnar part 33 is located at the underface of the through-hole, and the cross section of the columnar part 33 is greater than described lead to The cross section in hole.The exposing portion 32 connects the left interconnecting piece 31 and the columnar part 33, and the exposing portion 32 with it is described Left interconnecting piece 31 width having the same, the right side of the exposing portion 32 are located at the right of the columnar part 33.

Left sealant 71 is equipped in the shell 1, the left sealant 71 includes left vertical portion interconnected and Zuo Shui Flat portion, the height of the left vertical portion are greater than the height of the left horizontal part, the lower surface of this 8 body of first insulation include with The first contact surface that the upper surface of the exposing portion 32 contacts with each other and the second contact surface to contact with each other with the left vertical portion. The upper and lower surfaces of the left horizontal part are bonded with the bottom wall of the lower surface of the exposing portion 32 and the shell respectively, the left side The upper surface of vertical portion bonds second contact surface, and the left side of the left vertical portion bonds the right side of the exposing portion 32 Face, second insulating body 9 is supported on the right side of the left vertical portion to make first insulating body 8 with described second absolutely There is gap between edge ontology 9, when reducing the cut-off device and being detonated, the shock wave pair that explodes in first insulating body 1 The influence of second insulating body 9 and the element in second insulating body 9.The left sealant 71 described simultaneously is viscous using it Knot property, makes the left copper bar 3 be fixed on the bottom wall of the shell 1, first insulating body 8 is made to be fixed on the shell 1 Bottom wall.The left sealant 71 and the right sealant 72 are identical sealant, and there is vibration proof and sound insulation, heat-insulated etc. to make With can effectively buffer the shock wave to explode when the cut-off device is detonated, prevent involving range and involving strong for shock wave Spending big two influences other elements.

Accommodating space and slideway are equipped in first insulating body 8, the cut-off device includes being sequentially connected from top to bottom The priming system 41 positioned at the accommodating space, the piston 42 positioned at the slideway, be partially located at cut-offfing inside the through-hole Grid 43, the covering through-hole lower end silver strip 44 and the copper-base 47 below through-hole, further include have it is upper and lower through it The arc extinguishing washer 45 of the perforation at both ends, the columnar part 33 be cylinder, have a diameter larger than the internal diameter of the arc extinguishing washer 45 and Less than the outer diameter of the arc extinguishing washer 45, the upper end of the columnar part 33 supports the arc extinguishing washer 45.The copper-base 47 is located at Have in the perforation and between the circle wall of the arc extinguishing washer 45 and allows bit space, the upper/lower terminal difference of the copper-base 47 The top of the silver strip 44 and the columnar part 33 is connected, so that the right copper bar 2 and the left copper bar 3 pass through the copper-base 47 It is connected with each other with the silver strip 44, the edge that the silver strip 44 is supported in the upper end of the arc extinguishing washer 45 makes the side of the silver strip 44 Along the abutting right copper bar 2.

The grid 43 of cut-offfing is insulator, and the lower end for cut-offfing grid 43 is concave up to be equipped with container 431, the receipts The cell wall of tank 431 is to cut-off wall 432, and the inside for cut-offfing wall 432 and its bottom wall are equipped with arc quenching plate, the arc quenching plate with Ground wire connection, when generating high-voltage arc when the left copper bar 3 and the disconnection suddenly of the right copper bar 2, the arc quenching plate is similar to be kept away Thunder needle prevents it from being broken by high-voltage arc for protecting novel electric car fuse described in the utility model.The receipts Tank 431, the through-hole and the copper-base 47 are cylinder, and the outer diameter of the container 431 is less than or equal to described pass through The internal diameter in hole, and the internal diameter of the container 431 is greater than the diameter of the copper-base 47.

When the priming system 41 is detonated, the shock wave for generation of exploding pushes the piston 42 to transport downwards along the slideway It is dynamic, pushed when the piston 42 is moved downward along the slideway described in cut-off grid 43 and move downward, the grid 43 of cut-offfing The wall 432 that cut-offs can sever the silver strip 44, and then the wall 432 that cut-offs is inserted into the bit space and copper-base 47 is stretched of allowing Enter the container 431, so that the left copper bar 3 and the right copper bar 2 cut-off 47 phase of grid 43 and the copper-base by described It connects, since the grid 43 of cut-offfing is insulator, without electrical connection between the right copper bar 2 and the left copper bar 3, in It is to make to open a way between the left copper bar 3 and the right copper bar 2.

The arc extinguishing washer 45 includes several annular grid of mutual stack in the vertical direction, and the annular grid is exhausted Edge material, because the two adjacent annular grid are not to be integrally formed, therefore have between the two adjacent annular grid Gap.When having electric arc because disconnecting suddenly between the left copper bar 3 and the right copper bar 2, electric arc can be in the insulation material It being moved among gap in material, the temperature on the one hand reducing electric arc makes electric arc cooling, and because strengthening liberation, from And electric arc can be prevented free；On the other hand can elongating arc, press the arc diameter of electric arc small, and increase arc resistance, from And promote arc extinction.

Priming system cover board 46, the receiving are equipped between the roof of the shell 1 and the upper end of first insulating body 8 The upper end in space is open open end, and the priming system cover board 46 is blinded by the part open end.

In use, under normal condition in integrated circuit, the Hall sensor 61 is monitored on the right copper bar 2 Electric current is within preset value, and electric current in the novel electric car fuse is from the left copper bar 3, the copper-base 47, institute It states and is flowed through on silver strip 44 and the right copper bar 2, the arc extinguishing fuse 5 is considered as opening a way because resistance is excessive, or because of the left copper Row 3, the resistance of 2 place route of the copper-base 47, the silver strip 44 and the right copper bar are too small, and make 5 quilt of arc extinguishing fuse Short circuit does not have electric current to flow through on that is, described arc extinguishing fuse 5.

It when the Hall sensor 61 monitors that the electric current on the right copper bar 2 reaches preset value or is more than preset value When, firing circuit starting, and conducting wire or arresting element by being attached thereto discharge to the priming system 41, when electric discharge The shock wave of gunpowder in priming system 41 described in the spark ignition of generation, gunpowder explosion, generation of exploding pushes the piston 42 Moved downward along the slideway, be connected with the piston 42 described in cut-off grid 43 therewith in the through-hole downwards acutely Movement, it is described cut-off grid 43 it is described cut-off wall 432 break through after the silver strip 44 for being covered on the through-hole lower end continue to Under pour in the arc extinguishing washer 45, make it is described cut-off grid 43 it is described cut-off that wall 432 is inserted into the perforation described allow Bit space and the copper-base 47 protrude into the container 431 for cut-offfing grid 43, since the grid 43 of cut-offfing insulate, institute It states and cut-offs wall 432 and obstructed being electrically connected between the copper-base 47 and the right copper bar 2, to make the left copper bar 3 and described Open circuit suddenly between right copper bar 2, at this moment, the short circuit of the 5 place route of arc extinguishing fuse or open circuit are released from, and the arc extinguishing is molten 5 place line conductions of silk can reduce the left copper bar 3 and institute with certain shunting function when the arc extinguishing fuse 5 is connected The high pressure between right copper bar 2 is stated, to eliminate the electric arc generated between the left copper bar 3 and the right copper bar 2.When high current from When the arc extinguishing fuse 5 passes through on the line, the arc extinguishing fuse 5 can be blown, to make the novel electric car Fuse thoroughly disconnects.

But it is very big due to flowing through the electric current on the left copper bar 3 and the right copper bar 2 before, in the left copper bar 3 When disconnecting suddenly with the right copper bar 2, the electric arc generated between the left copper bar 3 and the right copper bar 2 will not be at once described Arc extinguishing fuse 5 is eliminated, so at the same time, electric arc enters the arc extinguishing washer 45 and along the gap in the arc extinguishing washer 45 Movement, to be cooled and be depressured in the arc extinguishing washer 45, thus by thoroughly eliminating, to improve the efficiency of arc extinguishing, drop Low arc extinguishing is not thorough bring security risk.

Because the part cut-off device is located in the through-hole of the right copper bar 2, and first insulating body 8 and described the Two insulating bodies 9 are integrated in the shell 1, to keep overall structure compact, can effectively be reduced described novel electronic The space occupancy of automobile fuse.Meanwhile if the shell 1 can prevent when first insulating body 8 is surprisingly scraped Its fragment splashes other devices and the circuit flown to hurt on automobile.The right side inner wall of the vertical component effect 22 and the shell 1 it Between gap and the circuit board 6 and the groove 91 between gap have good heat spreading function, the right side can be prevented Temperature on copper bar 2 and the circuit board 6 is excessively high, to play the role of prolonging the service life.

Herein, the nouns of locality such as related front, rear, top, and bottom are to be located in figure with components in attached drawing and zero Part mutual position defines, only for the purpose of expressing the technical solution clearly and conveniently.It should be appreciated that the noun of locality Use should not limit the claimed range of the application.

In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.

The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims (10)

1. a kind of novel electric car fuse, it is characterised in that: including shell and be contained in a shell and mutual left side The first insulating body and the second insulating body of right setting, a right copper bar pass through the right sidewall and described second of the shell absolutely Edge ontology simultaneously protrudes into first insulating body, and a left copper bar passes through the left side side wall of the shell and protrudes into described first absolutely In edge ontology, the left copper bar and the right copper bar are connected with each other in first insulating body by cut-off device, and described the Telemetry circuit is equipped in two insulating bodies, the telemetry circuit includes Hall sensor and firing circuit, the Hall sensor It is connected with the firing circuit, it is described when the Hall sensor monitors that the electric current on the right copper bar reaches preset value The cut-off device is ignited in firing circuit electric discharge to be made to open a way between the right copper bar and the left copper bar, is located at the intracorporal portion of the shell Dividing the left copper bar is exposing portion, and the exposing portion is emerging in outside first insulating body, and a left sealant is fixedly arranged on described The bottom wall of shell, the exposing portion are fixed by left sealant, and the left sealant supports first insulating body and described Second insulating body makes have gap between first insulating body and second insulating body.

2. novel electric car fuse as described in claim 1, it is characterised in that: be equipped in second insulating body Arc extinguishing fuse, the arc extinguishing fuse pass through conducting wire and the route comprising the left copper bar, the cut-off device and the right copper bar simultaneously Connection, the arc extinguishing fuse are monolithic melt, and before the cut-off device is detonated, the route where the arc extinguishing fuse is by the left side Line short where copper bar, the cut-off device and the right copper bar.

3. novel electric car fuse as described in claim 1, it is characterised in that: the right copper bar protrudes into described first One end of insulating body offers through-hole, is equipped with accommodating space and slideway in first insulating body, the cut-off device includes From top to bottom the sequentially connected priming system positioned at the accommodating space, the piston positioned at the slideway, be located at least partially within institute The silver strip and the copper-base below through-hole for stating the lower end cut-off grid, cover the through-hole inside through-hole, in the shell The internal left copper bar has the columnar part upwardly extended, and the upper/lower terminal of the copper-base is separately connected the silver strip and institute The top of columnar part is stated, the grid of cut-offfing is insulator, when the firing circuit electric discharge ignition priming system is detonated, institute Stating piston makes between the columnar part and the right copper bar along cut-offfing grid described in the slideway movement progress and sever the silver strip Connection disconnect.

4. novel electric car fuse as claimed in claim 3, it is characterised in that: the cut-off device further includes having to pass through Wear the arc extinguishing washer of the perforation of its upper/lower terminal, the copper-base be located in the perforation and with the circle wall of the arc extinguishing washer it Between have and allow bit space, the arc extinguishing washer is supported by the upper end of the columnar part, and the lower end for cut-offfing grid is recessed upwards There is container, the cell wall of the container is to cut-off wall, and the container and the copper-base are cylinder, the container Outer diameter is less than or equal to the internal diameter of the perforation, and the internal diameter of the container is greater than the diameter of the copper-base, described to cut-off When grid severs the silver strip, described cut-off allows the bit space and copper-base protrudes into the container described in wall insertion；It is described to go out The edge that the silver strip is supported in the upper end of arc washer makes the edge of the silver strip be close to the right copper bar, and the arc extinguishing washer includes Several annular grid of mutual stack in the vertical direction, the annular grid is insulating materials.

5. novel electric car fuse as claimed in claim 4, it is characterised in that: the left copper bar further includes being emerging in Outside the shell and horizontally disposed left interconnecting piece, the exposing portion is horizontally disposed and connects the left interconnecting piece and the column Shape portion, the columnar part are column structure, perpendicular to the exposing portion and are protruded into first insulating body, the column The diameter of the cross section in portion is greater than the internal diameter of the annular grid and is less than the outer diameter of the annular grid.

6. novel electric car fuse as claimed in claim 5, it is characterised in that: the left sealant includes mutually interconnecting The left vertical portion connect and left horizontal part, the height of the left vertical portion are greater than the height of the left horizontal part, first insulation The lower surface of ontology includes the first contact surface to contact with each other with the upper surface of the exposing portion and mutual with the left vertical portion Second contact surface of contact, the right side of the exposing portion is located at the right of the columnar part and the right side quilt of the exposing portion The left side of the left vertical portion is supported, and the lower surface of the exposing portion is supported by the left horizontal part, the left vertical portion Support second insulating body in right side.

7. novel electric car fuse as claimed in claim 5, it is characterised in that: the right copper bar is Z-type, including aobvious The right parallel portion of the right interconnecting piece and insertion first insulating body and second insulating body that are exposed at outside the shell, also Vertical component effect including connecting the right parallel portion and the right interconnecting piece, the vertical component effect are emerging in outside second insulating body And it is located in the shell；The shell is additionally provided with right sealant, the right sealant include right horizontal part interconnected and Right vertical portion, the right horizontal part is filled between the lower surface of second insulating body and the bottom wall of the shell, described Right vertical portion is filled between the left side of the vertical component effect and second insulating body right side.

8. novel electric car fuse as claimed in claim 7, it is characterised in that: the upper table of second insulating body The roof of the shell is supported in face and the intermediate region of the upper surface is recessed fluted downwards, and the telemetry circuit is distributed in circuit On plate, the circuit board is located at the upper area of the groove, and the Hall sensor is contained in the lower end area of the groove And the lower surface of the circuit board, the upper surface of the circuit board and the shell are fixed in the upper end of the Hall sensor Be equipped with fixed plate between roof, the volume of the groove be greater than the volume of the Hall sensor and make the Hall sensor with There is gap, the cross section of the circuit board is less than the cross section of the groove and makes the circuit between the cell wall of the groove There is gap between plate and the cell wall of the groove, the right side inner wall of the right side of second insulating body and the shell it Between have gap, between the right side of the vertical component effect and the right side inner wall of the shell have gap.

9. novel electric car fuse as claimed in claim 3, it is characterised in that: the roof of the shell and described the Priming system cover board is equipped between the upper end of one insulating body, the upper end of the accommodating space is open open end, the firer Product cover board is blinded by the part open end.

10. novel electric car fuse as claimed in claim 3, it is characterised in that: the right copper bar protrudes into described the One end of one insulating body offers two fixation holes, and the right copper bar is fixed on institute by two fixation hole by two fixing bolts The first insulating body is stated, and two fixation hole is symmetrically set to the opposite sides of the through-hole.