CN215988648U - Electric control type fuse - Google Patents
Electric control type fuse Download PDFInfo
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- CN215988648U CN215988648U CN202121339365.9U CN202121339365U CN215988648U CN 215988648 U CN215988648 U CN 215988648U CN 202121339365 U CN202121339365 U CN 202121339365U CN 215988648 U CN215988648 U CN 215988648U
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Abstract
The utility model provides an electric control type fuse, which comprises a high-speed breaker and an electronic measurement and control unit; the high-speed breaker comprises an insulating shell and an inline conductor penetrating through the insulating shell, wherein a groove is formed in the surface of the inline conductor, a breaking grid piece and a gas generating device connected with the breaking grid piece are sequentially arranged above the groove in the insulating shell, and an avoiding groove and an arc extinguish chamber communicated with the avoiding groove are formed below the groove in the insulating shell; the electronic measurement and control unit is arranged outside the insulating shell and is in contact with the direct-discharge conductor, the electronic measurement and control unit is further connected with the gas generation device, and the electronic measurement and control unit is used for detecting current flowing on the direct-discharge conductor, triggering the gas generation device when the current is overloaded and driving the grid-breaking piece to cut off the groove. The utility model has the beneficial effects that: the novel energy automobile protection device has the advantages that the rapid self-detection and rapid breaking are realized, the response speed is high, the complete protection function is independently completed without depending on an external trigger signal, and the safety performance of the novel energy automobile is improved.
Description
Technical Field
The utility model relates to the technical field of electrical protection devices, in particular to an electric control type fuse protector.
Background
A fuse (fuse) is an electric device that fuses a fuse body by heat generated by itself when a current exceeds a predetermined value, thereby breaking an electric circuit. The fuse melts the melt by the heat generated by the fuse after the current exceeds a specified value for a period of time, so as to cut off the circuit; a current protector is made by applying the principle. The fuse is widely applied to high and low voltage distribution systems, control systems and electric equipment, and is one of the most commonly applied protection devices as a short circuit and overcurrent protector.
At present, fuses are widely applied to various electric equipment and functional circuits of new energy vehicles, but when the new energy vehicles use the fuses, control signals of the fuses are trigger signals from a vehicle control system, and a management system (BMS) built in the vehicles judges current, but generally, delay of detection and signal output in the BMS is high, so that response speed of the fuses is low, and therefore, under the condition that some rapid protection actions are needed, the situation that the protection is not available may occur, and the whole vehicle performance and safety are greatly influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, in order to solve the problem that the detection and signal output delay of the fuse BMS in the new energy automobile is high, which results in a slow response speed of the fuse, embodiments of the present invention provide an electrically controlled fuse.
The embodiment of the utility model provides an electric control type fuse, which comprises a high-speed breaker and an electronic measurement and control unit;
the high-speed breaker comprises an insulating shell and a collinear electric conductor penetrating through the insulating shell, wherein a groove is formed in the surface of the collinear electric conductor, a breaking grid piece and a gas generating device connected with the breaking grid piece are sequentially arranged above the groove in the insulating shell, and an avoiding groove and an arc extinguish chamber communicated with the avoiding groove are formed below the groove in the insulating shell;
the electronic measurement and control unit is arranged outside the insulating shell and in contact with the straight-line conductor, the electronic measurement and control unit is further connected with a gas generation device, and the electronic measurement and control unit is used for detecting current flowing on the straight-line conductor and triggering the gas generation device and driving the grid breaking piece to cut off the groove when the current is overloaded.
Further, outer pawl is arranged on the outer wall of the upper portion of the cut-off grid piece, an inner bushing is arranged inside the insulating shell and surrounds the inner pawl arranged on the lower portion of the cut-off grid piece and on the inner wall of the cut-off grid piece, the lower portion of the cut-off grid piece is cut off, the groove is inserted into the avoiding groove, and the outer pawl is clamped into the inner pawl.
Furthermore, a step-shaped expansion opening is formed in the upper portion of the avoidance groove, and when the groove is cut off by the breaking grid piece, the edge portion of the groove at the opening of the groove is bent and deflected into the expansion opening.
Furthermore, the grooves are double-sided grooves which are arranged at the same position of the in-line conductor and are recessed in the upper surface and the lower surface.
Furthermore, a straight plate-shaped breaking blade is arranged at the lower part of the breaking grid piece, a sharp edge is arranged at the bottom of the breaking blade, and the sharp edge is in contact with the bottom of the groove.
Furthermore, arc-shaped transition surfaces are arranged on two sides of the upper portion of the breaking blade, chamfering structures are arranged on two sides of a groove opening of the groove, and the breaking blade moves to a set position after cutting off the groove and abuts against the transition surfaces.
Furthermore, a conical force transmission piston is further arranged between the cut-off grid piece and the gas generating device, a force transmission hole is formed in the force transmission piston along the axis direction of the force transmission piston, the force transmission hole is a stepped hole, the force transmission piston is arranged on the upper portion of the cut-off grid piece, and the output end of the gas generating device is inserted into the force transmission hole and is abutted to the upper portion of the cut-off grid piece.
Furthermore, the electronic measurement and control unit comprises a Hall current sensor for detecting the magnitude of the current and a processor for judging whether the current is overloaded or not.
Further, arc extinguishing materials are arranged in the arc extinguishing chamber.
The technical scheme provided by the embodiment of the utility model has the following beneficial effects: according to the electric control type fuse, the current passing through the direct-row conductor is detected directly through the electronic measurement and control unit, so that the high-speed breaker is triggered to perform breaking, quick self-detection and quick breaking are realized, the response speed is high, an external trigger signal is not required, a complete protection function is independently completed, the problem that the protection is not timely due to high detection and signal output delay of the fuse BMS in a new energy automobile is solved, and the safety performance of the new energy automobile is improved.
Drawings
FIG. 1 is a top plan view of an electrically controlled fuse of the present invention;
fig. 2 is a schematic sectional view taken along line a-a in fig. 1.
In the figure: the device comprises a 1-straight-line conductor, 2-electronic measurement and control units, 3-upper outer shell, 4-lower inner shell, 5-lower outer shell, 6-breaking grid piece, 7-gas generating device, 8-groove, 9-enlarged opening, 10-avoidance groove, 11-arc extinguish chamber, 12-breaking blade, 13-inner bushing, 14-inner pawl, 15-outer pawl, 16-force transmission piston and 17-gland.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides an electrically controlled fuse, which is mainly applied to a new energy vehicle and mainly includes a high-speed breaker and an electronic measurement and control unit 2.
Referring to fig. 2, the high-speed circuit breaker includes an insulating housing and an inline conductor 1 penetrating through the insulating housing. The insulating outer shell is made of insulating materials and comprises an upper outer shell 3 above the in-line conductor 1, and a lower inner shell 4 and a lower outer shell 5 which are located below the in-line conductor 1, wherein the upper outer shell 3, the lower inner shell 4 and the lower outer shell 5 are all of cavity structures.
The straight-line electric conductor 1 is a straight-plate-shaped copper bar, and has small overall resistance and strong circulation capacity. The inline conductor 1 is supported on the upper part of the lower inner shell 4, and the lower part of the upper outer shell 3 is fixedly connected with the upper part of the lower inner shell 4 so as to clamp and fix the inline conductor 1. The two ends of the straight-line conductor 1 extend out of the insulating shell respectively and are used for being connected with a protected main circuit.
The surface of the in-line conductor 1 is provided with a groove 8, so that the in-line conductor 1 forms a weak and easy-breaking part at the groove 8. The groove 8 is specifically a strip-shaped groove along the width direction of the inline conductor 1, and the cross-sectional shape of the groove 8 may be a U shape, a V shape, a trapezoid shape, or the like. The in-line conductor 1 is integrally formed, wherein the groove 8 is a stress groove with a certain depth machined on the surface of the in-line conductor 1 by using a numerical control machining technology, so that the groove 8 is easier to cut.
Preferably, the groove 8 is a double-sided groove with both upper and lower surfaces recessed at the same position of the in-line conductor 1, that is, stress grooves are processed on both upper and lower surfaces at the middle position of the in-line conductor 8 to form an obvious weak point.
And a breaking grid sheet 6 and a gas generating device 7 connected with the breaking grid sheet 6 are sequentially arranged above the groove 8 in the insulating shell, and the breaking grid sheet 6 is driven by the gas generating device 7 to shear the groove 8.
Specifically, the breaking grid 6 and the gas generating device 7 are both disposed in the upper housing 3, wherein the breaking grid 6 is located right above the groove 8 and specifically accommodated in a cylindrical cavity inside the upper housing 3. In the embodiment, the breaking grid sheet 6 is approximately T-shaped and consists of an upper cylindrical body and a lower sheet-shaped breaking blade 12, and the upper part of the breaking grid sheet 6 is constrained in the cylindrical cavity and can only move along the vertical direction.
The breaking blade 12 is located above the groove 8, both in the same vertical plane, the breaking blade 12 being aligned in the vertical direction with the groove 8. Here, the bottom of the opening blade 12 is provided with a V-shaped sharp edge, and the opening blade 12 is directly inserted into the groove 8, so that the sharp edge is abutted against the upper surface of the groove, which can accurately align the opening blade 12 with the groove 8 on one hand, and reduce the moving distance of the opening grid 12 on the other hand, thereby cutting off the groove 8 more quickly.
In addition, the outer wall of 12 upper portions of disconnected bars piece is equipped with outer pawl 15, insulating casing is inside to be equipped with interior bush 13, interior bush 13 set up in the cylindrical cavity in the last shell 3, interior bush 13 encircles 6 lower parts of disconnected bars piece and inner wall are equipped with interior pawl 14, when disconnected bars piece 6 moves down upper portion can get into interior bush 13, outer pawl 15 card is gone into interior pawl 14, interior pawl 14 with the mutual block of outer pawl 15 prevents to open disconnected bars piece 6 and kick-backs, guarantees reliable effect.
The gas generating device 7 is arranged on the top of the upper shell 3 and is positioned above the breaking grid sheet 6, wherein the gas generating device 7 is an initiating explosive device. The top of the upper shell 3 is provided with a gland 17, the lower end of the gas generating device 7 is an output end, the output end is abutted against the upper part of the break grid 6, and the upper end of the gas generating device 7 is pressed and fixed by the gland 17. The triggered gas generating device 7 can push the breaking grid sheet 6 to move downwards, and further push the breaking blade 12 to move downwards to shear the groove 8.
In addition, a conical force transmission piston 16 is further arranged between the breaking grid piece 6 and the gas generating device 7, a force transmission hole is formed in the force transmission piston 16 along the axis direction of the force transmission piston, the force transmission hole is a stepped hole, the force transmission piston 16 is arranged on the upper portion of the breaking grid piece 6, and the output end of the gas generating device 7 is inserted into the force transmission hole and is abutted to the upper portion of the breaking grid piece 6. The force transmission piston 16 disperses the driving force at the output end of the gas generating device 7, so that the driving force is uniformly transmitted to the upper part of the break-open grid sheet 6, and the break-open grid sheet 6 stably moves downwards.
In order to limit the downward movement distance of the breaking grid piece 6 when the groove 8 is cut, arc-shaped transition surfaces are arranged on two sides of the upper portion of the breaking blade 12, chamfering structures are arranged on two sides of a notch of the groove 8, the breaking blade 12 can continue to move downwards after the groove 8 is cut off until the chamfering structures abut against the transition surfaces, the breaking grid piece 6 is prevented from continuing to move downwards, and therefore the breaking blade 12 moves to a set position after the groove 8 is cut off and the chamfering structures abut against the transition surfaces.
And an arc extinguish chamber 11 which is positioned below the groove 8 and communicated with the avoidance groove 10 is arranged in the insulating shell. The avoiding groove 10 is arranged in the lower inner shell 4 and is positioned right below the groove 8. The breaking blade 12 cuts off the groove 8 and then enters the avoiding groove 10, and the avoiding groove 10 provides an accommodating space. Preferably, a step-shaped enlarged opening 9 is formed in the upper portion of the avoiding groove 10, and when the cutting blade 12 cuts the groove 8, the edge portion of the broken opening of the groove 8 is bent and deflected into the enlarged opening 9. This prevents the broken edge of the groove 8 from pressing against the blade 12 after it has been cut, which could affect the downward movement of the shutter 6.
The arc extinguishing chamber 11 is arranged in the lower outer shell 5, and the upper part of the lower outer shell 5 is fixedly connected with the lower part of the lower inner shell 4. The arc extinguish chamber 11 is located dodge the groove 10 below, dodge the groove 10 and run through from top to bottom the lower inner shell 4, the lower extreme directly with arc extinguish chamber 11 upper portion intercommunication. Arc extinguishing materials are arranged in the arc extinguishing chamber 11, and the arc extinguishing materials can be selected from energy absorption materials such as quartz sand. Arc extinguishing chamber 11 plays the arc extinguishing effect, cuts off the electric arc that slot 8 produced receives the extrusion effect of breaking blade 12 is along dodge groove 10 and get into in arc extinguishing chamber 11, carry out the arc extinguishing energy-absorbing through arc extinguishing material, until the current passes zero completely, accomplish thoroughly to divide absolutely.
The electronic measurement and control unit 2 is arranged outside the insulating shell, is positioned on a center parting line of the straight-line electric conductor 1 and is in contact with the straight-line electric conductor 1, and the electronic measurement and control unit 2 is also connected with a gas generating device 7. Generally, the electronic measurement and control unit 2 may select a circuit board composed of a hall current sensor and a processor, the hall current sensor is used for detecting the magnitude of the current passing through the in-line conductor 1, and the processor judges whether the current is overloaded or not, and sends a trigger signal to the gas generating device 7 when the current is overloaded.
Above-mentioned electric control type fuse directly detects through the electric current on the row conductor 1 through electron measurement and control unit 2, triggers when the electric current transships gas generating device 7, and then the drive break grid piece 6 moves down and cuts off slot 8, and pass through explosion chamber 11 carries out the arc extinguishing, realizes quick self-detection and quick disconnected branch, and response speed is fast, need not rely on outside trigger signal, independently accomplishes complete protect function, safe and reliable.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. An electrically controlled fuse, comprising: the device comprises a high-speed breaker and an electronic measurement and control unit;
the high-speed breaker comprises an insulating shell and a collinear electric conductor penetrating through the insulating shell, wherein a groove is formed in the surface of the collinear electric conductor, a breaking grid piece and a gas generating device connected with the breaking grid piece are sequentially arranged above the groove in the insulating shell, and an avoiding groove and an arc extinguish chamber communicated with the avoiding groove are formed below the groove in the insulating shell;
the electronic measurement and control unit is arranged outside the insulating shell and in contact with the straight-line conductor, the electronic measurement and control unit is further connected with a gas generation device, and the electronic measurement and control unit is used for detecting current flowing on the straight-line conductor and triggering the gas generation device and driving the grid breaking piece to cut off the groove when the current is overloaded.
2. An electrically controlled fuse as recited in claim 1, wherein: the outer wall of the upper portion of the cut-off grid piece is provided with outer inverted teeth, an inner bushing is arranged inside the insulating shell and surrounds the lower portion of the cut-off grid piece, inner inverted teeth are arranged on the inner wall of the insulating shell, the lower portion of the cut-off grid piece is cut off, the groove is inserted into the avoidance groove, and the outer inverted teeth are clamped into the inner inverted teeth.
3. An electrically controlled fuse as recited in claim 1, wherein: the upper part of the avoiding groove is provided with a step-shaped expanding opening, and when the groove is cut off by the breaking grid sheet, the edge part at the position of the groove breaking opening is bent and deflected into the expanding opening.
4. An electrically controlled fuse as recited in claim 1, wherein: the grooves are double-sided grooves which are arranged at the same position of the straight-line conductor and are both concave in upper and lower surfaces.
5. An electrically controlled fuse as recited in claim 1, wherein: the lower part of the breaking grid piece is provided with a straight plate-shaped breaking blade, the bottom of the breaking blade is provided with a sharp edge, and the sharp edge is in contact with the bottom of the groove.
6. An electrically controlled fuse as recited in claim 5, wherein: the two sides of the upper part of the breaking blade are provided with arc-shaped transition surfaces, the two sides of the notch of the groove are provided with chamfering structures, and the breaking blade moves to a set position after cutting off the groove and abuts against the transition surfaces.
7. An electrically controlled fuse as recited in claim 1, wherein: the gas generator is characterized in that a conical force transmission piston is further arranged between the breaking grid piece and the gas generating device, a force transmission hole is formed in the force transmission piston along the axis direction of the force transmission piston, the force transmission hole is a stepped hole, the force transmission piston is arranged on the upper portion of the breaking grid piece, and the output end of the gas generating device is inserted into the force transmission hole and is abutted to the upper portion of the breaking grid piece.
8. An electrically controlled fuse as recited in claim 1, wherein: the electronic measurement and control unit comprises a Hall current sensor for detecting the magnitude of current and a processor for judging whether the current is overloaded or not.
9. An electrically controlled fuse as recited in claim 1, wherein: arc extinguishing materials are arranged in the arc extinguishing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121339365.9U CN215988648U (en) | 2021-06-16 | 2021-06-16 | Electric control type fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121339365.9U CN215988648U (en) | 2021-06-16 | 2021-06-16 | Electric control type fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215988648U true CN215988648U (en) | 2022-03-08 |
Family
ID=80578032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121339365.9U Active CN215988648U (en) | 2021-06-16 | 2021-06-16 | Electric control type fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215988648U (en) |
-
2021
- 2021-06-16 CN CN202121339365.9U patent/CN215988648U/en active Active
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