CN115692126B - New energy automobile circuit disconnection resettable fuse - Google Patents
New energy automobile circuit disconnection resettable fuse Download PDFInfo
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- CN115692126B CN115692126B CN202211462350.0A CN202211462350A CN115692126B CN 115692126 B CN115692126 B CN 115692126B CN 202211462350 A CN202211462350 A CN 202211462350A CN 115692126 B CN115692126 B CN 115692126B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 88
- 230000007246 mechanism Effects 0.000 claims abstract description 66
- 230000003068 static effect Effects 0.000 claims abstract description 35
- 230000009471 action Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000463219 Epitheca Species 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The application relates to the technical field of new energy automobile circuit disconnection, in particular to a new energy automobile circuit disconnection resettable fuse, which comprises an upper shell, a lower shell, a static iron core mechanism, a movable iron core mechanism, a coil, an anode signal terminal, a cathode signal terminal, an anode terminal, a cathode terminal, a conducting plate and a first reset spring. According to the method, electromagnetic attraction is generated by the static iron core mechanism through coil electrifying, the movable iron core mechanism drives the conducting plate to be close to the positive electrode wiring terminal and the negative electrode wiring terminal, so that the main circuit is connected, when overload, short circuit, temperature and collision are detected by a system, the signal circuit is disconnected, the current of the positive electrode signal wiring terminal disappears, the static iron core mechanism loses electromagnetic force, the movable iron core mechanism drives the conducting plate to be separated from the positive electrode wiring terminal and the negative electrode wiring terminal by a certain interval under the action of the first reset spring, the main circuit is disconnected, and the circuit is timely cut off; therefore, the on-off of the new energy automobile circuit is realized, and the circuit can be reset after being disconnected and can be reused.
Description
Technical Field
The application relates to the technical field of circuit disconnection of new energy automobiles, in particular to a resettable fuse for circuit disconnection of a new energy automobile.
Background
At present, along with the high-speed development of new energy automobiles, higher requirements are also put forward on power batteries of the new energy automobiles, at present, lithium ion batteries are widely used on pure electric automobiles, the safe use of the lithium ion batteries is an important precondition guarantee for the safe running of electric automobiles, the new energy automobiles are adopted to solve the problem of electric safety, and the high-voltage heavy current is adopted from an on-vehicle charger, a battery pack to a speed regulation controller and a driving motor, so that the important attention of electric safety is paid to the electric safety.
According to the actual structure and circuit characteristics of the pure electric vehicle, safe and reasonable protection measures are designed, and special system planning and design must be carried out aiming at high-voltage protection in order to ensure high-voltage electric safety. The international standardization organization and the united states, europe, japan, etc. have issued technical standards for electric vehicles, which set more strict standards and requirements for high-voltage electric safety and control of electric vehicles, and specify that the high-voltage system must be provided with a high-voltage electric automatic cut-off device.
At present, a new energy automobile faces some difficulties, when an IGBT of one phase of a synchronous motor controller fails, magnetic force lines still exist in the synchronous motor, wheels can drive motor windings to cut the magnetic force lines in a cart/trailer state, and the temperature of the motor windings can continuously rise, so that potential safety hazards exist. The fuse in the prior art separates the blasting driving circuit by adopting shock waves generated by explosive detonation, but the fuse can only be used once and cannot be reset, has high cost and wastes resources, and meanwhile, has manufacturing risks, so that the situation needs to be further improved.
Disclosure of Invention
In order to solve the problems that the existing fuse cannot be reset, the cost is high and resources are wasted, the application provides a new energy automobile circuit disconnection resettable fuse, which adopts the following technical scheme:
a circuit breaking resettable fuse of a new energy automobile comprises an upper shell, a lower shell, a static iron core mechanism, a movable iron core mechanism, a coil, an anode signal terminal, a cathode signal terminal, an anode terminal, a cathode terminal, a conducting plate and a first reset spring;
the upper shell and the lower shell form a shell of the fuse, the static iron core mechanism is fixedly arranged on the lower shell, the movable iron core mechanism is movably arranged on the upper shell, and a gap is reserved between the movable iron core mechanism and the static iron core mechanism;
the coil is sleeved on the static iron core mechanism, the positive signal wiring terminal and the negative signal wiring terminal are respectively connected to two ends of the coil, the positive wiring terminal and the negative wiring terminal are arranged on the upper shell, a space is reserved between the positive wiring terminal and the negative wiring terminal, and the conducting plate is arranged on the movable iron core mechanism and driven by the movable iron core mechanism to move towards a direction close to or far away from the positive wiring terminal and the negative wiring terminal; when the conducting plate is close to the positive terminal and the negative terminal, the positive terminal and the negative terminal are conducted through the conducting plate;
the first return spring is arranged between the movable iron core mechanism and the static iron core mechanism.
By adopting the technical scheme, when wiring is performed, the positive electrode wiring terminal is connected with the positive electrode of the main circuit, the negative electrode wiring terminal is connected with the negative electrode of the main circuit, the positive electrode signal wiring terminal is connected with the positive electrode of the signal circuit, and the negative electrode signal wiring terminal is connected with the negative electrode of the signal circuit; the signal current flows in from the positive signal terminal, flows out to the negative signal terminal through the coil; when the coil is electrified, the static iron core mechanism generates electromagnetic attraction force, the movable iron core mechanism is attracted to move towards the direction close to the static iron core mechanism under the action of the electromagnetic attraction force, the movable iron core mechanism drives the conducting plate to move, the conducting plate is communicated with the positive electrode terminal and the negative electrode terminal, the main circuit is always in an on state, when the overload, the short circuit, the temperature and the collision are detected by the system, the signal circuit is disconnected, the current of the positive electrode signal terminal disappears, the coil is not electrified at the moment, the static iron core mechanism loses electromagnetic force, the movable iron core mechanism is separated from the static iron core mechanism by a certain interval under the action of the first reset spring, and the conducting plate is driven to be separated from the positive electrode terminal and the negative electrode terminal by a certain interval, so that the main circuit is disconnected, and the circuit is timely disconnected.
Optionally, the movable iron core mechanism includes a first insulating block and a movable iron core, the first insulating block is arranged above the movable iron core, the positive electrode terminal and the negative electrode terminal are respectively arranged at two sides of the first insulating block, the conducting plate is arranged on the first insulating block, two ends of the conducting plate are respectively connected with the positive electrode terminal and the negative electrode terminal in a matched manner, and a sliding block baffle is arranged between the conducting plate and the positive electrode terminal and between the conducting plate and the negative electrode terminal, and the sliding block baffle is connected with the upper shell in a sliding manner; pushing blocks matched with the sliding block baffle are arranged on two sides of the first insulating block, and when the movable iron core moves towards the static iron core mechanism, the pushing blocks push the sliding block baffle to slide towards two sides so that the conducting plate is communicated with the positive electrode terminal and the negative electrode terminal; the upper shell is provided with an elastic reset piece for resetting the slide block baffle.
By adopting the technical scheme, because electric arcs are generated in the circuit in the high-voltage and high-current circuit, the electric arcs can possibly cause the wrong connection between the positive electrode terminal and the negative electrode terminal; by disposing the positive terminal and the negative terminal on both sides of the first insulating block, the connection between the positive terminal and the negative terminal by the arc at the time of circuit disconnection is prevented; similarly, by providing a slider baffle between the conductive plate and the positive and negative terminals, arcing is prevented from connecting the conductive plate to the positive and negative terminals when the circuit is open; the conducting plate, the positive electrode terminal and the negative electrode terminal can be separated by a smaller distance, so that the size of the fuse can be made smaller;
through setting up the pushing block in both sides of the first insulating block, when the static iron core produces electromagnetic force, the electromagnetic force drives the movable iron core to move towards static iron core direction, the first insulating block moves along with movable iron core, the pushing block pushes the baffle of the slide block to slide towards both sides, in order to make the conducting plate communicate with positive pole terminal and negative pole terminal, thus realize the connection of the main circuit; when the electromagnetic force disappears, the first insulating block resets, and at the moment, the sliding block baffle resets under the elastic action of the elastic resetting piece, and the conducting plate is separated from the positive terminal and the negative terminal.
Optionally, a movable cavity is arranged on the first insulating block, the conducting plate is movably arranged in the movable cavity, a spring supporting point is arranged in the middle of the conducting plate, and a tight supporting spring is arranged between the spring supporting point and the upper wall of the movable cavity.
By adopting the technical scheme, the abutting spring and the movable cavity are arranged to enable the conducting plate to have a certain movable space, and when the conducting plate is contacted with the positive terminal and the negative terminal under the drive of the movable iron core, the abutting spring acts on the upper surface of the conducting plate to enable the connection between the conducting plate and the positive terminal and the connection between the conducting plate and the negative terminal to be tighter; the contact failure of the two ends is prevented when the two ends are connected or the contact failure caused by abrasion after a certain time is used.
Optionally, contact bumps are disposed at the positions where the conducting plate, the positive terminal and the negative terminal are connected to each other.
Through adopting above-mentioned technical scheme, through adopting the bump design in the position of switch-on board, anodal wiring end and negative pole wiring end interconnect, further prevent that electric arc from producing, and the contact effect is better.
Optionally, two sides of the lower shell are provided with elongated mounting holes.
Through adopting above-mentioned technical scheme, the inferior valve is provided with long mounting hole, is convenient for finely tune after the installation.
Optionally, a T-shaped connection block is arranged on the slide block baffle, and the upper shell is provided with a T-shaped groove matched with the T-shaped connection block.
Through adopting above-mentioned technical scheme, through the cooperation of T type connecting block and T type groove, make the slider baffle slide in the epitheca steadily, increased the stability that the slider baffle slided.
Optionally, the elastic restoring piece is a second restoring spring, and the second restoring spring is arranged between the T-shaped connecting block and the side wall of the T-shaped groove.
Through adopting above-mentioned technical scheme, specifically disclose the elastic return piece and be second reset spring, through setting up second reset spring, when first reset spring resets, when making first insulating block upwards move, the slider baffle resets again under the effect of second reset spring and between switch-on plate and positive terminal and negative terminal, prevents that electric arc from producing.
Optionally, the quiet iron core mechanism includes second insulating piece and quiet iron core, the second insulating piece sets up on the quiet iron core, the coil cover is established the lower part of second insulating piece, offer in the middle of the second insulating piece and supply the through-hole that the iron core passed moves, the week side of second insulating piece is provided with supplies anodal signal terminal with the side groove of negative pole signal terminal embedding.
Through adopting above-mentioned technical scheme, through setting up the second insulating piece to offer through-hole and side groove at the second insulating piece, thereby carry out spacingly to quiet iron core, moving iron core, anodal signal wiring end and negative pole signal wiring end, thereby improve the stability of fuse structure.
Optionally, a spring slot is formed in the middle of the second insulating block, and the first return spring is arranged in the spring slot.
Through adopting above-mentioned technical scheme, carry out spacingly through setting up the spring groove to first reset spring, improve the stability of structure.
Optionally, the first return spring is a tower spring.
Through adopting above-mentioned technical scheme, first reset spring sets up to tower spring to make first reset spring can compress to less thickness, save space.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the fuse protector can be reset and reused by utilizing the technical principle of electromagnetic force, so that the cost and the resources are saved, and the manufacturing safety is improved;
2. the circuit can be used with various abnormal circuit signals such as overload, short circuit, temperature, collision and the like, and only the signal circuit is disconnected when the circuit abnormality is detected;
3. the circuit is insulated by the sliding block baffle after being disconnected, and the circuit cannot be conducted for the second time after being disconnected, so that the safety and the reliability are high;
4. the middle of the conducting plate is provided with a tight abutting spring, so that the conducting plate is tightly connected with the positive terminal and the negative terminal; the contact failure of the two ends is prevented when the two ends are connected or the contact failure caused by abrasion after a certain time is used.
Drawings
Fig. 1 is a schematic structural diagram of a circuit-breaking resettable fuse of a new energy automobile according to an embodiment of the present application;
FIG. 2 is an exploded schematic view of a circuit-breaking resettable fuse for a new energy vehicle according to an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of a circuit-breaking resettable fuse for a new energy vehicle according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a circuit-breaking resettable fuse with an upper shell removed for a new energy automobile according to an embodiment of the present application;
fig. 5 is a schematic structural view of a resettable fuse with circuit breaking upper and lower shells for a new energy automobile according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a resettable fuse with a circuit-breaking circuit for a new energy vehicle, in which an upper case and a lower case are hidden and a main circuit is turned on.
Reference numerals illustrate: 100. an upper case; 110. a second return spring; 120. a T-shaped groove; 200. a lower case; 210. a set screw; 220. a mounting hole; 300. a static iron core mechanism; 310. a second insulating block; 311. a through hole; 312. a side groove; 313. a spring groove; 320. a stationary core; 400. a movable iron core mechanism; 410. a first insulating block; 411. a movable cavity; 412. a circular bump; 420. a movable iron core; 430. a slide block baffle; 431. round corners; 432. a T-shaped connecting block; 440. a pushing block; 441. a guide cambered surface; 500. a coil; 510. a positive signal terminal; 520. a negative signal terminal; 530. contacting the convex points; 600. a positive terminal; 700. a negative terminal; 800. a conductive plate; 810. a spring fulcrum; 820. a spring is abutted tightly; 900. a first return spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present application will be further described in detail with reference to fig. 1 to 6 and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
It should also be noted that in the embodiments of the present application, words such as "exemplary" or "such as" or "for example" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "such as" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" or "for example" is intended to present related concepts in a concrete fashion.
It should also be noted that the terms "first," "second," and "third," etc. in the description and figures of this application are used for distinguishing between different objects or between different processes of the same object and not for describing a particular sequential order of objects. The terms "comprising" and "having" and any variations thereof, as referred to in the description of the present application, are intended to cover non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may optionally include other steps or elements not listed or inherent to such process, method, article, or apparatus.
The embodiment of the application discloses a resettable fuse for disconnecting a circuit of a new energy automobile, which can be used in a power system of power distribution equipment of the new energy automobile, is applicable to rated voltage 440V-1000V AC/DC, and can be reset for a starting time of not more than 15 milliseconds under the condition of up to 1000 volts and 1000 amperes. Referring to fig. 1 and 2, the resettable fuse includes an upper case 100, a lower case 200, a stationary core mechanism 300, a movable core mechanism 400, a coil 500, a positive signal terminal 510, a negative signal terminal 520, a positive terminal 600, a negative terminal 700, a conductive plate 800, and a first reset spring 900.
Referring to fig. 3, the upper case 100 forms a case of the fuse, the stationary core mechanism 300 is fixedly provided to the lower case 200, the movable core mechanism 400 is movably provided to the upper case 100, and a space is provided between the movable core mechanism 400 and the stationary core mechanism 300; the coil 500 is sleeved on the static iron core mechanism 300, the positive signal terminal 510 and the negative signal terminal 520 are respectively connected to two ends of the coil 500, the positive terminal 600 and the negative terminal 700 are arranged on the upper shell 100, a space is reserved between the positive terminal 600 and the negative terminal 700, and the conducting plate 800 is arranged on the movable iron core mechanism 400 and driven by the movable iron core mechanism 400 to move towards or away from the positive terminal 600 and the negative terminal 700; when the conductive plate 800 approaches the positive terminal 600 and the negative terminal 700, the positive terminal 600 and the negative terminal 700 are conducted through the conductive plate 800; the first return spring 900 is disposed between the movable core mechanism 400 and the stationary core mechanism 300.
Specifically, the upper case 100 and the lower case 200 are connected by using a fixing screw 210 to form a case, and the static iron core mechanism 300, the movable iron core mechanism 400, the coil 500, the conductive plate 800 and the first return spring 900 are encapsulated in the case, and the static iron core mechanism 300 and the coil 500 form an electromagnet; the positive signal terminal 510 and the negative signal terminal 520 are exposed out of the middle of the casing, and are used for connecting a signal circuit and receiving signal current; the positive terminal 600 and the negative terminal 700 are exposed above the case for connection to a main circuit.
In the wiring, the positive terminal 600 is connected to the positive electrode of the main circuit, the negative terminal 700 is connected to the negative electrode of the main circuit, the positive signal terminal 510 is connected to the positive electrode of the signal circuit, and the negative signal terminal 520 is connected to the negative electrode of the signal circuit. Under normal conditions, the signal circuit is always in a state of having signal current flowing in from the positive signal terminal 510, through the coil 500 and out to the negative signal terminal 520; when the coil 500 is electrified, the static iron core mechanism 300 generates electromagnetic attraction force, the movable iron core mechanism 400 is attracted to move towards the direction close to the static iron core mechanism 300 under the action of the electromagnetic attraction force, and the movable iron core mechanism 400 drives the conducting plate 800 to move, so that the conducting plate 800 is communicated with the positive electrode terminal 600 and the negative electrode terminal 700, and a main circuit at the moment is in a connection state.
When the system detects overload, short circuit, temperature and collision are sent out, the system turns off the signal circuit, signal current in the signal circuit disappears, current flowing into the positive signal terminal 510 disappears, at the moment, the coil 500 is not electrified, the static iron core mechanism 300 loses electromagnetic force, the movable iron core mechanism 400 is separated from the static iron core mechanism 300 by a certain interval under the action of the first reset spring 900, and the conducting plate 800 is driven to be separated from the positive terminal 600 and the negative terminal 700 by a certain interval, so that the main circuit is disconnected, and the circuit is timely cut off.
Referring to fig. 4 and 5 together, the movable iron core mechanism 400 includes a first insulating block 410 and a movable iron core 420, the first insulating block 410 is disposed above the movable iron core 420, the positive terminal 600 and the negative terminal 700 are respectively disposed at two sides of the first insulating block 410, the conducting plate 800 is disposed on the first insulating block 410, two ends of the conducting plate 800 are respectively connected with the positive terminal 600 and the negative terminal 700 in a matching manner, a sliding block baffle 430 is disposed between the conducting plate 800 and the positive terminal 600 and the negative terminal 700, and the sliding block baffle 430 is slidably connected to the upper case 100; the first insulating block 410 is provided at both sides thereof with pushing blocks 440 engaged with the slider barrier 430, and when the movable iron core 420 moves toward the stationary iron core 320, the pushing blocks 440 push the slider barrier 430 to slide to both sides so that the conductive plate 800 communicates with the positive terminal 600 and the negative terminal 700; the upper case 100 is provided with an elastic restoring member for restoring the slider shutter 430.
Because of the occurrence of an arc in the circuit in the high voltage and high current circuit, the arc may cause a misconnection between the positive terminal 600 and the negative terminal 700. Accordingly, by disposing the positive terminal 600 and the negative terminal 700 at both sides of the first insulation block 410, an arc is prevented from connecting between the positive terminal 600 and the negative terminal 700 when the circuit is opened; also, by providing the slider shutter 430 between the conductive plate 800 and the positive and negative terminals 600 and 700, the conductive plate 800 is prevented from being connected to the positive and negative terminals 600 and 700 by an arc when the circuit is opened; and thus the conduction plate 800 can be spaced a small distance from the positive terminal 600 and the negative terminal 700, so that the size of the fuse can be made smaller.
Specifically, the positive terminal 600 and the negative terminal 700 are both made of copper and are both plate-shaped, and the slider baffle 430 is made of PPS plastic and is gate-shaped, and is disposed on both sides of the first insulating block 410 and slidably connected to the upper case 100. When the conductive plate 800 is in a spaced state from the positive and negative terminals 600 and 700, the main circuit is disconnected and the slider shutter 430 covers over the positive and negative terminals 600 and 700 to reduce erroneous connection; the end of the sliding block baffle 430, which is close to the first insulating block 410, is a rounded corner 431, and a guiding cambered surface 441 is provided below the pushing block 440 of the first insulating block 410, when the first insulating block 410 moves downward along with the movable iron core 420, the sliding block baffle 430 is pushed out to two sides by the pushing block 440 under the guiding action of the guiding cambered surface 441, so that the conducting plate 800 is connected with the positive terminal 600 and the negative terminal 700.
By providing the insulating slider shutter 430, the conduction plate 800 can be spaced a small distance from the positive terminal 600 and the negative terminal 700 and is not conducted for the second time after being disconnected, so that the size of the fuse can be made smaller and the safety and reliability are higher.
Further, referring to fig. 3, the conductive plate 800, the positive terminal 600, and the negative terminal 700 are provided with contact bumps 530 at the positions where they are connected to each other; the slider shutter 430 covers over the contact bumps 530 of the positive and negative terminals 600 and 700 when the main circuit is in an off state to further prevent arcing and to provide a better contact effect when the main circuit is connected.
Referring to fig. 2, both sides of the slider shutter 430 are provided with T-shaped connection blocks 432, the upper case 100 is provided with T-shaped grooves 120 to be fitted with the T-shaped connection blocks 432, and the slider shutter 430 slides in the T-shaped grooves 120 through the T-shaped connection blocks 432 to separate or not the conductive plates 800. By the cooperation of the T-shaped connection block 432 and the T-shaped groove 120, the sliding of the sliding block baffle 430 is more stable. Further, the elastic reset member for resetting the driving slider shutter 430 is a second reset spring 110, and the second reset spring 110 is disposed between the T-shaped connection block 432 and the side wall of the T-shaped slot 120, so that when the first reset spring 900 resets to move the first insulating block 410 upwards, the driving slider shutter 430 is slid again between the conductive plate 800 and the positive and negative terminals 600 and 700, thereby preventing the occurrence of arc.
Referring to fig. 5 and 6, the stationary core mechanism 300 includes a second insulating block 310 and a stationary core 320, the second insulating block 310 is disposed on the stationary core 320, a coil 500 is sleeved on the lower portion of the second insulating block 310, a through hole 311 through which the movable core 420 passes is provided in the middle of the second insulating block 310, and a side groove 312 into which the positive signal terminal 510 and the negative signal terminal 520 are inserted is provided at the circumferential side of the second insulating block 310.
The second insulating block 310 is installed between the upper case 100 and the lower case 200, and is fixedly connected to the lower case 200, and one end of the first return spring 900 is abutted against the second insulating block 310, and the other end is abutted against the movable core 420. The movable iron core 420 moves towards the direction approaching or far away from the static iron core 320 through the through hole 311 on the second insulating block 310, when the movable iron core 420 approaches the static iron core 320 and the main circuit is communicated, the first reset spring 900 is in a compressed state, and after the electromagnetic force disappears, the first reset spring 900 resets to drive the movable iron core 420 to move towards the direction far away from the static iron core 320.
Specifically, the second insulating block 310 is made of PPS plastic, the positive signal terminal 510 and the negative signal terminal 520 are bar-shaped, and the positive signal terminal 510 and the negative signal terminal 520 are connected to two ends of the coil 500 through conductors respectively and are on the same horizontal line, and the positive signal terminal 510 and the negative signal terminal 520 are respectively located in the side slots 312 on two sides of the second insulating block 310, and limit up and down through the side slots 312, and limit two sides thereof through the cooperation of the lower case 200 and the bottom of the side slots 312, so that the structure is stable.
Further, as can be seen from fig. 2, the middle portion of the second insulating block 310 is provided with a spring slot 313, and the first return spring 900 is disposed in the spring slot 313, so as to limit the first return spring 900, thereby improving the stability of the structure.
Specifically, the first return spring 900 is a tower-type spring, so that the first return spring 900 can be compressed to a smaller thickness, and space is saved.
Since the main circuit is in a connected state in most cases, both ends of the conductive plate 800 are in a connected state with the positive terminal 600 and the negative terminal 700, respectively, for a long period of time, poor contact may occur after a certain period of use or wear may occur after a certain period of use, resulting in loose contact.
Referring to fig. 4, in order to make connection between the conductive plate 800 and the positive and negative terminals 600 and 700 tighter, a movable cavity 411 is provided on the first insulating block 410, the conductive plate 800 is movably provided in the movable cavity 411, a spring fulcrum 810 is provided in the middle of the conductive plate 800, and a tightening spring 820 is provided between the spring fulcrum 810 and the upper wall of the movable cavity 411.
Specifically, a concave portion is provided in the middle of the conductive plate 800 as a spring supporting point 810, a circular protruding block 412 is provided on the upper wall of the movable cavity 411, one end of the abutting spring 820 is sleeved on the circular protruding block 412, the other end abuts on the spring supporting point 810, and the abutting spring 820 is limited by the two ends of the conductive plate 800 and the circular protruding block 412. In this embodiment, the width of the recess of the conductive plate 800 is equal to the width of the upper wall of the movable cavity 411, and when moving, the upper wall of the movable cavity 411 can be embedded in the recess of the conductive plate 800, so that the conductive plate 800 can move a larger distance.
When the main circuit is connected, the conducting plate 800 moves downwards to be connected with the positive terminal 600 and the negative terminal 700, and compresses the abutting spring 820, so that the conducting plate 800 is subjected to downward acting force under the action of the abutting spring 820, the contact convex points 530 of the conducting plate 800 are more tightly connected with the contact convex points 530 of the positive terminal 600 and the negative terminal 700, when the contact convex points 530 are worn after long-time use, good contact can still be formed between the contact convex points 530 through the abutting spring 820, and poor contact at two ends or poor contact caused by wear after a certain time use are prevented.
Furthermore, the mounting holes 220 are formed in the two sides of the lower case 200, the mounting holes 220 are long, and screws are used for mounting the fuse on a circuit through the long mounting holes 220 during mounting, so that the screws can move in the mounting holes 220, and the mounting positions of the fuse can be finely adjusted conveniently.
The implementation principle of the circuit-breaking resettable fuse of the new energy automobile is as follows: the technical principle of electromagnetic force is utilized, the problem that the existing fuse cannot be reset is broken through, the fuse can be reset and reused, the cost and the resources are saved, and the manufacturing safety is improved; and can be used in combination with various abnormal circuit signals such as overload, short circuit, temperature, collision and the like; the circuit is insulated by the insulating baffle after being disconnected, and the circuit is not conducted for the second time after being disconnected, so that the safety and the reliability are high; and the abutting spring 820 is arranged, so that the fuse can still have good contact under long-time use, and poor contact of two ends or poor contact caused by abrasion after a certain time of use are prevented.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (9)
1. A new energy automobile circuit disconnection resettable fuse, its characterized in that: the device comprises an upper shell (100), a lower shell (200), a static iron core mechanism (300), a movable iron core mechanism (400), a coil (500), a positive signal terminal (510), a negative signal terminal (520), a positive terminal (600), a negative terminal (700), a conducting plate (800) and a first reset spring (900);
the upper shell (100) and the lower shell (200) form a shell of the fuse, the static iron core mechanism (300) is fixedly arranged on the lower shell (200), the movable iron core mechanism (400) is movably arranged on the upper shell (100), and an interval is reserved between the movable iron core mechanism (400) and the static iron core mechanism (300);
the coil (500) is sleeved on the static iron core mechanism (300), the positive signal terminal (510) and the negative signal terminal (520) are respectively connected to two ends of the coil (500), the positive terminal (600) and the negative terminal (700) are arranged on the upper shell (100), a space is reserved between the positive terminal (600) and the negative terminal (700), and the conducting plate (800) is arranged on the movable iron core mechanism (400) and driven by the movable iron core mechanism (400) to move towards a direction approaching or separating from the positive terminal (600) and the negative terminal (700); when the conducting plate (800) is close to the positive terminal (600) and the negative terminal (700), the positive terminal (600) and the negative terminal (700) are conducted through the conducting plate (800);
the first return spring (900) is arranged between the movable iron core mechanism (400) and the static iron core mechanism (300); the movable iron core mechanism (400) comprises a first insulating block (410) and a movable iron core (420), the first insulating block (410) is arranged above the movable iron core (420), the positive electrode terminal (600) and the negative electrode terminal (700) are respectively arranged on two sides of the first insulating block (410), the conducting plate (800) is arranged on the first insulating block (410), two ends of the conducting plate (800) are respectively connected with the positive electrode terminal (600) and the negative electrode terminal (700) in a matched mode, sliding block baffles (430) are respectively arranged between the conducting plate (800) and the positive electrode terminal (600) and between the conducting plate and the negative electrode terminal (700), and the sliding block baffles (430) are connected with the upper shell (100) in a sliding mode; pushing blocks (440) matched with the sliding block baffle plates (430) are arranged on two sides of the first insulating block (410), and when the movable iron core (420) moves towards the static iron core mechanism (300), the pushing blocks (440) push the sliding block baffle plates (430) to slide towards two sides so that the conducting plate (800) is communicated with the positive electrode terminal (600) and the negative electrode terminal (700); the upper case (100) is provided with an elastic restoring member for restoring the slider shutter (430).
2. The new energy automobile circuit breaking resettable fuse of claim 1, wherein: the novel insulating structure is characterized in that a movable cavity (411) is formed in the first insulating block (410), the conducting plate (800) is movably arranged in the movable cavity (411), a spring supporting point (810) is arranged in the middle of the conducting plate (800), and a tight supporting spring (820) is arranged between the spring supporting point (810) and the upper wall of the movable cavity (411).
3. The new energy automobile circuit breaking resettable fuse of claim 1, wherein: the conducting plate (800), the positive terminal (600) and the negative terminal (700) are all provided with contact bumps (530) at the positions where they are connected to each other.
4. The new energy automobile circuit breaking resettable fuse of claim 1, wherein: two sides of the lower shell (200) are provided with elongated mounting holes (220).
5. The new energy automobile circuit breaking resettable fuse of claim 1, wherein: the sliding block baffle (430) is provided with a T-shaped connecting block (432), and the upper shell (100) is provided with a T-shaped groove (120) matched with the T-shaped connecting block (432).
6. The new energy automobile circuit breaking resettable fuse of claim 5, wherein: the elastic reset piece is a second reset spring (110), and the second reset spring (110) is arranged between the T-shaped connecting block (432) and the side wall of the T-shaped groove (120).
7. The new energy automobile circuit breaking resettable fuse of claim 1, wherein: the static iron core mechanism (300) comprises a second insulating block (310) and a static iron core (320), the second insulating block (310) is arranged on the static iron core (320), a coil (500) is sleeved on the lower portion of the second insulating block (310), a through hole (311) for the movable iron core (420) to penetrate through is formed in the middle of the second insulating block (310), and a side groove (312) for the positive electrode signal terminal (510) and the negative electrode signal terminal (520) to be embedded is formed in the periphery of the second insulating block (310).
8. The new energy automobile circuit breaking resettable fuse of claim 7, wherein: a spring groove (313) is formed in the middle of the second insulating block (310), and the first return spring (900) is arranged in the spring groove (313).
9. The new energy automobile circuit breaking resettable fuse of claim 8, wherein: the first return spring (900) is a tower spring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211462350.0A CN115692126B (en) | 2022-11-22 | 2022-11-22 | New energy automobile circuit disconnection resettable fuse |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211462350.0A CN115692126B (en) | 2022-11-22 | 2022-11-22 | New energy automobile circuit disconnection resettable fuse |
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| CN115692126A CN115692126A (en) | 2023-02-03 |
| CN115692126B true CN115692126B (en) | 2024-03-19 |
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| CN202211462350.0A Active CN115692126B (en) | 2022-11-22 | 2022-11-22 | New energy automobile circuit disconnection resettable fuse |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102918620A (en) * | 2010-06-17 | 2013-02-06 | 日产自动车株式会社 | Electromagnetic relay |
| CN103794416A (en) * | 2014-02-28 | 2014-05-14 | 浙江南峰电气有限公司 | Magnetism holding contactor |
| CN205376408U (en) * | 2016-01-10 | 2016-07-06 | 深圳巴斯巴科技发展有限公司 | Sealed direct current contactor with high breaking capacity |
| CN207233657U (en) * | 2017-07-21 | 2018-04-13 | 深圳市沃特玛电池有限公司 | A kind of combined type fusing contactor |
-
2022
- 2022-11-22 CN CN202211462350.0A patent/CN115692126B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102918620A (en) * | 2010-06-17 | 2013-02-06 | 日产自动车株式会社 | Electromagnetic relay |
| CN103794416A (en) * | 2014-02-28 | 2014-05-14 | 浙江南峰电气有限公司 | Magnetism holding contactor |
| CN205376408U (en) * | 2016-01-10 | 2016-07-06 | 深圳巴斯巴科技发展有限公司 | Sealed direct current contactor with high breaking capacity |
| CN207233657U (en) * | 2017-07-21 | 2018-04-13 | 深圳市沃特玛电池有限公司 | A kind of combined type fusing contactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115692126A (en) | 2023-02-03 |
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