CN207425774U - A kind of DC fast speed fuse used for electric vehicle - Google Patents
A kind of DC fast speed fuse used for electric vehicle Download PDFInfo
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- CN207425774U CN207425774U CN201721219967.4U CN201721219967U CN207425774U CN 207425774 U CN207425774 U CN 207425774U CN 201721219967 U CN201721219967 U CN 201721219967U CN 207425774 U CN207425774 U CN 207425774U
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Abstract
The utility model discloses a kind of DC fast speed fuses used for electric vehicle, including shell, inner fixed stand is equipped in shell, copper-base column is equipped in inner fixed stand, copper-base column includes the connected upper copper-base of contact and lower copper-base, through-flow fuse is installed by welding between upper copper-base and lower copper-base, the lower copper-base cavity connected up and down is set in lower copper-base, the piston moved up and down is equipped in lower copper-base cavity；Arc extinguishing fuse is welded on inner fixed stand；Upper copper-base, lower copper-base, inner fixed stand and piston form small-sized cavity, and insulating oil is filled in small cavity body, is full of insulating oil around through-flow fuse；Quartz sand is filled between shell and inner fixed stand, is full of quartz sand around arc extinguishing fuse.A kind of DC fast speed fuse used for electric vehicle of the utility model has the advantages that：1st, compared with common fuse, rated current is big, low in energy consumption, responsiveness is quick；2nd, it is simple for process, at low cost, reliability is high compared with the bridge-type mixed type limiting fuse that explodes.
Description
Technical field
The utility model is related to fuse field more particularly to a kind of DC fast speed fuses of electric vehicle protection.
Background technology
Fuse is a kind of electric appliance for playing safeguard protection in electric system, can be widely used for conduct in sorts of systems
The protection of power grid and electrical equipment, when power grid or the circuit of electrical equipment generation short circuit or overload fault, fuse can be automatic
Circuit is cut off, is damaged to avoid electrical equipment, prevents accident from spreading.
Common fuse is made of packing materials such as metal bath, shell and quartz sands, and wherein melt is control fuse
The key element of characteristic can obtain the fuse of different protection features by the different narrow neck structure size designs of melt.But
Existing fuse has the following problems when being protected for high voltage loop of electric automobile：When using low overload characteristic fuse, melt
Overcurrent of the disconnected device when automobile boost phase is easily due to cannot withstand acceleration and cause false protection；And when special using high overload
During property fuse, then due to narrow neck is oversized and cause the disjunction overlong time in small short trouble and can not be in time to system
It is protected.
Mixed type limiting fuse solves the logical of fuse using explosion bridge-type high-speed breaking device and the parallel connection of arc extinguishing fuse
The contradiction of stream and breaking speed, and various failures can be quickly detected with reference to electronic controller, but explode bridge-type high-speed breaking device
It is driven using explosive, has the following problems 1) explosive restricted lifetime in practical applications, it can be gradual with the growth of usage time
Decomposition failure；2) priming systems such as explosive is expensive；3) environment temperature is required harsh.Simultaneously electronic control system there is also
Tripping and malfunction are possible, and protection reliability is not high.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of DC fast speed fuse used for electric vehicle, have
The performance advantages such as protection act speed is fast, reliability is high, and have many advantages, such as that manufacturing process is simple, at low cost.
A kind of DC fast speed fuse used for electric vehicle of the utility model is equipped with interior solid including shell, in the shell
Determine frame, copper-base column is equipped in the inner fixed stand, the copper-base column includes the connected upper copper-base of contact and lower copper-base, the upper copper
Through-flow fuse is installed by welding between pole and lower copper-base, the lower copper-base cavity connected up and down, the lower copper are set in the lower copper-base
The piston moved up and down is equipped in the cavity of pole；The inner fixed stand includes fixed cylinder, and the fixed cylinder outside is clockwise and is mutually
90 ° of arrangements are equipped with O ° of supporting rib, 90 ° of supporting ribs, 180 ° of supporting ribs and 270 ° of supporting ribs, and is equipped on the O ° of supporting rib
One copper bar is equipped with the second copper bar on 270 ° of supporting ribs, arc extinguishing fuse is welded on the inner fixed stand, the arc extinguishing melts
Silk is weldingly connected respectively with the O ° of supporting rib, 90 ° of supporting ribs, 180 ° of supporting ribs and 270 ° of supporting ribs clockwise；The upper copper
Pole, lower copper-base, inner fixed stand and piston form small-sized cavity, and insulating oil, the through-flow fuse are filled in the small cavity body
Surrounding is full of the insulating oil；Quartz sand is filled between the shell and inner fixed stand, is full of institute around the arc extinguishing fuse
State quartz sand.
In the application fixed frame be cylindrical structure, cylindrical outer press 0 °, 90 °, 180 °, 270 ° arrangement O ° of supporting rib, 90 ° of branch
Support muscle, 180 ° of supporting ribs and 270 ° of supporting ribs, arc extinguishing fuse are fixed on each supporting rib, and arc extinguishing fuse fracture is distributed in 0 ° of support
Between muscle and 90 ° of supporting ribs, between 90 ° of supporting ribs and 180 ° of supporting ribs, between 180 ° of supporting ribs and 270 ° of supporting ribs, arc extinguishing melts
Supporting rib will not be damaged during the silk starting the arc.
Further, upper copper-base O-ring is equipped between the upper copper-base and inner fixed stand, the upper copper-base O-ring is arranged
On described outside copper-base, the upper copper-base is by being threadably mounted in the inner fixed stand.
Further, lower copper-base O-ring is equipped between the lower copper-base and inner fixed stand, the lower copper-base O-ring is arranged
Outside the lower copper-base, the lower copper-base is by being threadably mounted in the inner fixed stand.
Further, piston O-ring is equipped between the piston and lower copper-base cavity, the piston O-ring is set in institute
It states outside piston, the piston is by being threadably mounted in the lower copper-base cavity.
Upper copper-base O-ring, lower copper-base O-ring, piston O-ring in the technical program are mainly used for carrying out insulating oil close
Envelope, and the pressure of 20 atmospheric pressure can be born without revealing.
Further, the shell has bottom surface, and the center of the bottom surface offers lower copper-base hole, and the lower copper-base passes through
The lower copper-base hole is simultaneously fixedly connected with the lower copper-base hole by screw thread；The shell is equipped with cover board, the center of the cover board
Copper-base hole is offered, the upper copper-base by screw thread is fixedly connected with through the upper copper-base hole and with the upper copper-base hole.
Further, first welding copper bus outboard end of the upper end of copper-base and O ° of supporting rib on described, described
Two welding copper bus are in the lower end of the lower copper-base and the outboard end of 270 ° of supporting ribs.First copper bar is pressed on copper-base using screw thread
Upper end, bending part inlay solid plate outboard end, and second copper bar is pressed on lower copper-base lower end using screw thread, under bending part is inlayed
Solid plate outboard end.
Further, the insulating oil and quartz sand are not in contact.Make in through-flow fuse and the quartz sand in insulating oil
Arc extinguishing fuse forms paralleling model.
A kind of DC fast speed fuse used for electric vehicle of the utility model has the advantages that：1st, fuse with common
Device is compared, and rated current is big, low in energy consumption, responsiveness is quick；2nd, compared with the bridge-type mixed type limiting fuse that explodes, work
Skill is simple, at low cost, reliability is high.
Description of the drawings
Fig. 1 is the structure diagram of the present embodiment；
Fig. 2 is the structure left view of Fig. 1；
Fig. 3 is the enclosure structure top view of the present embodiment；
Fig. 4 is the circuit theory schematic diagram of the present embodiment；
Fig. 5 is the schematic diagram of the breaking course of the present embodiment.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
As shown in Fig. 1-3, a kind of DC fast speed fuse used for electric vehicle of the present embodiment includes cylindrical shell 4,
Inner fixed stand is equipped in shell 4, copper-base column is equipped in inner fixed stand 7, copper-base column includes the connected upper copper-base 5 of contact and lower copper-base
8, through-flow fuse 6 is installed by welding between upper copper-base 5 and lower copper-base 8, the lower copper-base cavity connected up and down is set in lower copper-base 8, under
The piston 9 moved up and down is equipped in copper-base cavity；Inner fixed stand includes fixed cylinder 7, and 7 outside of fixed cylinder is clockwise and mutually in 90 °
Arrangement is equipped with O ° of 71,90 ° of supporting rib, 72,180 ° of supporting rib supporting rib 73 and 270 ° of supporting ribs 74, is installed on O ° of supporting rib 71
There is the first copper bar 11, the first copper bar 11 is welded on the upper end of copper-base 5 and the outboard end of O ° of supporting rib 71, on 270 ° of supporting ribs 74
Second copper bar 12 is installed, the second copper bar 12 is welded on the lower end of lower copper-base 8 and the outboard end of 270 ° of supporting ribs 74, inner fixed stand
On be welded with arc extinguishing fuse 10, arc extinguishing fuse 10 respectively clockwise with O ° of 71,90 ° of supporting rib, 72,180 ° of supporting rib supporting rib 73
It is weldingly connected with 270 ° of supporting ribs 74；Upper copper-base 5, lower copper-base 8, inner fixed stand and piston 9 form small-sized cavity, in small cavity body
Filled with insulating oil, insulating oil is full of around through-flow fuse 6；Filled with quartz sand, arc extinguishing fuse between shell 4 and inner fixed stand
Full of quartz sand around 10, insulating oil and quartz sand are not in contact.
Upper copper-base O-ring 21 is equipped between upper copper-base 5 and inner fixed stand, upper copper-base O-ring 21 is set in outside copper-base 5,
Upper copper-base 5 is by being threadably mounted in inner fixed stand.
Lower copper-base O-ring 22 is equipped between lower copper-base 8 and inner fixed stand, lower copper-base O-ring 22 is set in outside lower copper-base 8,
Lower copper-base 8 is by being threadably mounted in inner fixed stand.
Piston O-ring 23 is equipped between piston and lower copper-base cavity, piston O-ring 23 is set in outside piston 9, and piston 9 is logical
It crosses and is threadably mounted in lower copper-base cavity.
Shell 4 has bottom surface, and the center of bottom surface offers lower copper-base hole 81, and lower copper-base 8 is through lower copper-base hole 81 and under
Copper-base hole 81 is fixedly connected with by screw thread；Shell is equipped with cover board 3, and the center of cover board 3 offers copper-base hole 51, and upper copper-base 5 is worn
It crosses copper-base hole 51 and is fixedly connected with upper copper-base hole 51 by screw thread.
Operation principle is used by a kind of DC fast speed fuse used for electric vehicle of the present embodiment：The present embodiment is main
It is composed in parallel by through-flow fuse 6 and arc extinguishing fuse 10, the general only one row's fracture of design of through-flow fuse 6, and arc extinguishing fuse 10 is connected
Fracture device number is then designed according to system operating voltage.Since through-flow 6 resistance of fuse is small, main circuit current is by through-flow when normal through-flow
Fuse 6 flows through, and ensures the through-flow Wen Sheng of fuse by it；When system occurs overloading or during short trouble, through-flow fuse 6 is molten first
The disconnected starting the arc, electric current are quickly transferred to arc extinguishing fuse 10 under arc voltage effect, and the current limliting point of fault current is realized by arc extinguishing fuse 10
It is disconnected.In order to ensure that through-flow fuse 6 can bear the insulation performance of fuse after disjunction overvoltage and disjunction, through-flow fuse 6 seals
In insulating oil, circuit diagram signal is as shown in Figure 4.
As shown in figure 5, i in figure1For through-flow fuse electric current, i2It is breaking course fuse voltage for arc extinguishing fuse electric current, u.
The present embodiment breaking course shows as follows：During normal work, through-flow 6 resistance of fuse is much smaller than 10 resistance of arc extinguishing fuse,
Rated current IeAlmost all is undertaken by through-flow fuse 6；(the t in Fig. 5 when system short-circuit fault1Moment), electric current rises rapidly,
As the I of fault current2T values reach the forearc I of through-flow fuse 62(t in Fig. 5 during t values2Moment), the through-flow fuse failure starting the arc, failure
Electric current shifts under arc voltage effect to arc extinguishing fuse 10, (t in Fig. 5 after the completion of transfer3Moment) lead electric arc in through-flow fuse 6
Extinguish, arc extinguishing fuse 10 fuses the starting the arc (t in Fig. 5 after a period of time4Moment), the arc voltage higher than system voltage is generated, therefore
Hinder electric current and reach maximum ImaxAnd begin to decline, until the complete disjunction of circuit (t in Fig. 54Moment).Since through-flow fuse 6 seals
It in insulating oil, therefore can ensure under the conditions of the small―gap suture after single break fuses, bear the impact and disjunction of disjunction overvoltage
The effect of system nominal voltage is without puncturing afterwards.
A kind of DC fast speed fuse used for electric vehicle of the present embodiment has the advantages that：1st, with common fuse
It compares, rated current is big, low in energy consumption, responsiveness is quick；2nd, compared with the bridge-type mixed type limiting fuse that explodes, technique
Simply, it is at low cost, reliability is high.
Moreover, it will be appreciated that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
Using specification as an entirety, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (7)
1. a kind of DC fast speed fuse used for electric vehicle, it is characterised in that：Including shell, interior fixation is equipped in the shell
Frame, copper-base column is equipped in the inner fixed stand, and the copper-base column includes the connected upper copper-base of contact and lower copper-base, the upper copper-base
Through-flow fuse is installed by welding between lower copper-base, the lower copper-base cavity connected up and down, the lower copper-base are set in the lower copper-base
The piston moved up and down is equipped in cavity；The inner fixed stand includes fixed cylinder, and the fixed cylinder outside is clockwise and mutually in 90 °
Arrangement is equipped with O ° of supporting rib, 90 ° of supporting ribs, 180 ° of supporting ribs and 270 ° of supporting ribs, and first is equipped on the O ° of supporting rib
Copper bar is equipped with the second copper bar on 270 ° of supporting ribs, arc extinguishing fuse, the arc extinguishing fuse is welded on the inner fixed stand
It is weldingly connected clockwise with the O ° of supporting rib, 90 ° of supporting ribs, 180 ° of supporting ribs and 270 ° of supporting ribs respectively；The upper copper-base,
Lower copper-base, inner fixed stand and piston form small-sized cavity, filled with insulating oil in the small cavity body, around the through-flow fuse
Full of the insulating oil；Quartz sand is filled between the shell and inner fixed stand, is full of the stone around the arc extinguishing fuse
Sand.
2. a kind of DC fast speed fuse used for electric vehicle according to claim 1, it is characterised in that：The upper copper-base with
Upper copper-base O-ring is equipped between inner fixed stand, the upper copper-base O-ring is set in outside the upper copper-base, and the upper copper-base passes through
It is threadably mounted in the inner fixed stand.
3. a kind of DC fast speed fuse used for electric vehicle according to claim 1, it is characterised in that：The lower copper-base with
Lower copper-base O-ring is equipped between inner fixed stand, the lower copper-base O-ring is set in outside the lower copper-base, and the lower copper-base passes through
It is threadably mounted in the inner fixed stand.
4. a kind of DC fast speed fuse used for electric vehicle according to claim 1, it is characterised in that：The piston is under
Piston O-ring is equipped between copper-base cavity, the piston O-ring is set in outside the piston, and the piston is installed by screw thread
In the lower copper-base cavity.
5. a kind of DC fast speed fuse used for electric vehicle according to claim 1, it is characterised in that：The shell has
Bottom surface, the center of the bottom surface offer lower copper-base hole, the lower copper-base through the lower copper-base hole and with the lower copper-base hole
It is fixedly connected with by screw thread；The shell is equipped with cover board, and the center of the cover board offers copper-base hole, and the upper copper-base passes through
The upper copper-base hole is simultaneously fixedly connected with the upper copper-base hole by screw thread.
6. a kind of DC fast speed fuse used for electric vehicle according to claim 1, it is characterised in that：First copper bar
Be welded on the upper end of the upper copper-base and the outboard end of O ° of supporting rib, second welding copper bus in the lower end of the lower copper-base and
The outboard end of 270 ° of supporting ribs.
7. a kind of DC fast speed fuse used for electric vehicle according to claim 1, it is characterised in that：The insulating oil and
Quartz sand is not in contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721219967.4U CN207425774U (en) | 2017-09-22 | 2017-09-22 | A kind of DC fast speed fuse used for electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721219967.4U CN207425774U (en) | 2017-09-22 | 2017-09-22 | A kind of DC fast speed fuse used for electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207425774U true CN207425774U (en) | 2018-05-29 |
Family
ID=62313884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721219967.4U Active CN207425774U (en) | 2017-09-22 | 2017-09-22 | A kind of DC fast speed fuse used for electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207425774U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107452574A (en) * | 2017-09-22 | 2017-12-08 | 武汉布雷科电气有限公司 | A kind of DC fast speed fuse used for electric vehicle |
| CN112951680A (en) * | 2021-02-25 | 2021-06-11 | 西安交通大学 | Structure for improving rated current capacity of vacuum fuse based on double-gap structure |
-
2017
- 2017-09-22 CN CN201721219967.4U patent/CN207425774U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107452574A (en) * | 2017-09-22 | 2017-12-08 | 武汉布雷科电气有限公司 | A kind of DC fast speed fuse used for electric vehicle |
| CN107452574B (en) * | 2017-09-22 | 2020-02-04 | 杭州布雷科电气有限公司 | Direct current fast acting fuse for electric automobile |
| CN112951680A (en) * | 2021-02-25 | 2021-06-11 | 西安交通大学 | Structure for improving rated current capacity of vacuum fuse based on double-gap structure |
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