CN115692126A - Fuse that can reset of new energy automobile circuit disconnection - Google Patents
Fuse that can reset of new energy automobile circuit disconnection Download PDFInfo
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- CN115692126A CN115692126A CN202211462350.0A CN202211462350A CN115692126A CN 115692126 A CN115692126 A CN 115692126A CN 202211462350 A CN202211462350 A CN 202211462350A CN 115692126 A CN115692126 A CN 115692126A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 81
- 230000007246 mechanism Effects 0.000 claims abstract description 64
- 230000003068 static effect Effects 0.000 claims abstract description 25
- 241000463219 Epitheca Species 0.000 claims abstract description 3
- 239000012212 insulator Substances 0.000 claims 5
- 238000009413 insulation Methods 0.000 claims 2
- 230000009471 action Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010891 electric arc Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000001012 protector Effects 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
- 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
- 238000004880 explosion Methods 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008520 organization 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 utility model relates to a technical field of new energy automobile circuit disconnection especially relates to a fuse that can reset of new energy automobile circuit disconnection, including epitheca, inferior valve, quiet iron core mechanism, move iron core mechanism, coil, anodal signal wiring end, negative pole signal wiring end, anodal wiring end, negative pole wiring end, conduction board and a reset spring. When the system detects that overload, short circuit, temperature and collision are sent out, a signal circuit is disconnected, current of a positive electrode signal terminal disappears, the static iron core mechanism loses electromagnetic force, the moving iron core mechanism drives the conduction plate to be separated from the positive electrode terminal and the negative electrode terminal by a certain interval under the action of a first reset spring, the main circuit is disconnected, and the circuit is cut off in time; therefore, the on-off of the new energy automobile circuit is realized, and the new energy automobile circuit can be reset after being disconnected and can be repeatedly used.
Description
Technical Field
The application relates to the technical field of new energy automobile circuit disconnection, especially relates to a fuse that can reset in new energy automobile circuit disconnection.
Background
At present, with the high-speed development of new energy vehicles, higher requirements are also put forward on power batteries of the new energy vehicles, at present, lithium ion batteries are most widely used on pure electric vehicles, the safe use of the lithium ion batteries is an important precondition guarantee for the safe driving of the electric vehicles, the new energy vehicles are adopted to relate to the electrical safety problem, and the lithium ion batteries, the vehicle-mounted chargers, the battery packs, the speed regulation controller and the driving motor are all high-voltage large currents, so that the electrical safety is focused.
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 on high-voltage protection in order to guarantee the high-voltage safety. The international organization for standardization and the united states, europe, japan, etc. have issued several technical standards for electric vehicles in sequence, which set strict standards and requirements for high voltage safety and control of electric vehicles, and stipulate that a high voltage system must have a high voltage automatic cut-off device.
At present, new energy automobile faces some difficulties, and after a certain looks IGBT of synchronous machine controller took place to become invalid, synchronous machine still can have the magnetic line of force, and under the state of pushing away the car/trailer, the wheel can drive motor winding and cut the magnetic line of force, and motor winding temperature can continuously rise, has the potential safety hazard. The fuse in the prior art adopts the shock wave generated by the detonation of gunpowder to separate the blasting driving circuit, but the fuse can be used only once and cannot be reset, the cost is high, resources are wasted, and meanwhile, the manufacturing risk exists, and the condition needs to be further improved.
Disclosure of Invention
In order to solve the problem that current fuse can not reset, with high costs and resource-wasting, this application provides a fuse that can reset of new energy automobile circuit disconnection, adopts following technical scheme:
a resettable fuse for circuit disconnection of a new energy automobile comprises an upper shell, a lower shell, a static iron core mechanism, a moving iron core mechanism, a coil, a positive signal terminal, a negative signal terminal, a positive terminal, a negative terminal, a conduction 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 moving iron core mechanism is movably arranged on the upper shell, and a gap is formed between the moving iron core mechanism and the static iron core mechanism;
the coil is sleeved on the static iron core mechanism, the positive electrode signal terminal and the negative electrode signal terminal are respectively connected to two ends of the coil, the positive electrode terminal and the negative electrode terminal are arranged on the upper shell, a gap is formed between the positive electrode terminal and the negative electrode terminal, the conducting plate is arranged on the moving iron core mechanism and moves towards the direction close to or far away from the positive electrode terminal and the negative electrode terminal under the driving of the moving iron core mechanism; when the conduction plate is close to the positive terminal and the negative terminal, the positive terminal and the negative terminal are conducted through the conduction plate;
the first return spring is arranged between the moving iron core mechanism and the static iron core mechanism.
By adopting the technical scheme, during wiring, the positive terminal is connected with the positive pole of the main circuit, the negative terminal is connected with the negative pole of the main circuit, the positive signal terminal is connected with the positive pole of the signal circuit, and the negative signal terminal is connected with the negative pole of the signal circuit; the signal current flows in from the positive signal terminal and flows out to the negative signal terminal through the coil; when the coil is electrified, the static iron core mechanism generates electromagnetic attraction, the iron core mechanism is attracted to move towards the direction close to the static iron core mechanism under the action of the electromagnetic attraction, the moving iron core mechanism drives the conduction plate to move, the conduction plate is communicated with the positive terminal and the negative terminal, the main circuit is always in a connection state, when the system detects that overload, short circuit, temperature and collision are sent out, the signal circuit is disconnected, the current of the positive terminal disappears, the coil is not electrified, the static iron core mechanism loses the electromagnetic force, the moving iron core mechanism is separated from the static iron core mechanism at a certain interval under the action of the first reset spring and drives the conduction plate to be separated from the positive terminal and the negative terminal at a certain interval, the main circuit is disconnected, and the circuit is cut off in time.
Optionally, the movable iron core mechanism includes a first insulating block and a movable iron core, the first insulating block is disposed above the movable iron core, the positive terminal and the negative terminal are disposed on two sides of the first insulating block, respectively, the conduction plate is disposed on the first insulating block, two ends of the conduction plate are connected to the positive terminal and the negative terminal in a matching manner, respectively, a slider baffle is disposed between the conduction plate and the positive terminal and between the conduction plate and the negative terminal, and the slider baffle is slidably connected to the upper case; 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 direction of the static iron core mechanism, the pushing blocks push the sliding block baffle to slide towards two sides so that the conduction plate is communicated with the positive terminal and the negative terminal; the upper shell is provided with an elastic resetting piece for resetting the sliding block baffle.
By adopting the technical scheme, because electric arcs can be generated in the circuit of high voltage and large current, the electric arcs can cause the misconnection between the positive terminal and the negative terminal; by arranging the positive terminal and the negative terminal on two sides of the first insulating block, the connection between the positive terminal and the negative terminal caused by electric arc when the circuit is disconnected is prevented; similarly, by arranging a slide block baffle between the conduction plate and the positive terminal and the negative terminal, the conduction plate is prevented from being connected with the positive terminal and the negative terminal by electric arc when the circuit is disconnected; the conducting plate and the positive terminal and the negative terminal can be separated by a small distance, so that the size of the fuse can be made smaller;
the pushing blocks are arranged on the two sides of the first insulating block, when the static iron core generates electromagnetic force, and the electromagnetic force drives the movable iron core to move towards the static iron core, the first insulating block moves along with the movable iron core, the pushing blocks push the sliding block baffle to slide towards the two sides, so that the conduction plate is communicated with the positive terminal and the negative terminal, and the connection of a main circuit is realized; when the electromagnetic force disappears, the first insulating block resets, and at the moment, under the elastic action of the elastic resetting piece, the slide block baffle resets to separate the conducting plate from the positive terminal and the negative terminal.
Optionally, a movable cavity is arranged on the first insulating block, the conduction plate is movably arranged in the movable cavity, a spring fulcrum is arranged in the middle of the conduction plate, and a tight spring is arranged between the spring fulcrum and the upper wall of the movable cavity.
By adopting the technical scheme, the conduction plate has a certain moving space due to the arrangement of the abutting spring and the moving cavity, and when the conduction plate is driven by the moving iron core to be in contact with the positive terminal and the negative terminal, the abutting spring acts on the upper surface of the conduction plate, so that the conduction plate is more tightly connected with the positive terminal and the negative terminal; the occurrence of poor contact at both ends during connection or poor contact caused by abrasion after a certain period of use is prevented.
Optionally, the positions at which the conduction plate, the positive terminal and the negative terminal are connected to each other are all provided with contact bumps.
Through adopting above-mentioned technical scheme, adopt the bump design through the position that switches on board, positive terminal and negative terminal interconnect, further prevent that electric arc from producing, and the contact effect is better.
Optionally, two sides of the lower shell are provided with long mounting holes.
Through adopting above-mentioned technical scheme, the inferior valve is provided with microscler mounting hole, is convenient for finely tune after the installation.
Optionally, a T-shaped connecting block is arranged on the sliding block baffle, and a T-shaped groove matched with the T-shaped connecting block is arranged on the upper shell.
Through adopting above-mentioned technical scheme, through the cooperation in 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 reset piece is a second reset spring, and the second reset 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 that elasticity resets and be second reset spring, through setting up second reset spring, reset when first reset spring, make first insulating block rebound, the slider baffle resets again under second reset spring's effect and leads to between board and positive terminal and the negative terminal, prevents that electric arc from producing.
Optionally, quiet iron core mechanism includes second collets and quiet iron core, the second collets sets up on the quiet iron core, the coil cover is established the lower part of second collets, the confession has been seted up in the middle of the second collets move the through-hole that the iron core passed, the week side of second collets is provided with the confession anodal signal wiring end with the side channel of negative pole signal wiring end embedding.
Through adopting above-mentioned technical scheme, through setting up the second insulating block to set up through-hole and side slot at the second insulating block, thereby carry on 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 groove is formed in the middle of the second insulating block, and the first return spring is arranged in the spring groove.
Through adopting above-mentioned technical scheme, carry on 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 type spring to make first reset spring can compress to littleer thickness, save space.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the fuse can be reset and can be repeatedly used by utilizing the technical principle of electromagnetic force, so that the cost and resources are saved, and the manufacturing safety is improved;
2. the circuit can be used in cooperation with various abnormal circuit signals such as overload, short circuit, temperature, collision and the like, and only the signal circuit needs to be disconnected when the circuit abnormality is detected;
3. after the circuit is disconnected, the sliding block baffle is insulated, so that secondary conduction cannot be realized after the circuit is disconnected, and the safety and reliability are high;
4. a tight spring is designed in the middle of the conduction plate, so that the conduction plate is more tightly connected with the positive terminal and the negative terminal; the condition that the contact between two ends is poor or the contact is poor due to abrasion after a certain time of use is prevented from occurring during connection.
Drawings
Fig. 1 is a schematic structural diagram of a new energy vehicle circuit-breaking resettable fuse according to an embodiment of the present application;
FIG. 2 is an explosion schematic diagram of a new energy vehicle circuit breaking resettable fuse according to an embodiment of the application;
fig. 3 is a schematic structural cross-sectional view of a new energy vehicle circuit breaking resettable fuse according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a new energy vehicle circuit breaking resettable fuse with an upper housing hidden according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a new energy vehicle circuit breaking resettable fuse with upper and lower shells hidden according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a resettable fuse for disconnecting a new energy vehicle circuit, in which an upper case and a lower case are hidden and a main circuit is connected according to an embodiment of the present application.
Description of reference numerals: 100. an upper shell; 110. a second return spring; 120. a T-shaped groove; 200. a lower case; 210. fixing screws; 220. mounting holes; 300. a static iron core mechanism; 310. a second insulating block; 311. a through hole; 312. a side groove; 313. a spring slot; 320. a stationary iron core; 400. a moving 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. guiding the arc surface; 500. a coil; 510. a positive signal terminal; 520. a negative signal terminal; 530. contacting the bumps; 600. a positive terminal; 700. a negative terminal; 800. a conduction plate; 810. a spring fulcrum; 820. the spring is tightly propped; 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 invention is further described in detail below with reference to fig. 1-6 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not delimit the invention.
It will be understood that when an element is referred to as being "secured to" 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 as used herein are for illustrative purposes only and do not denote a unique embodiment.
It should also be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate that examples, illustrations or descriptions are provided. Any embodiment or design described herein as "exemplary" or "e.g.," or "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" or "for example" is intended to present relevant concepts in a concrete fashion.
It should be further noted that the terms "first", "second", and "third", etc. in the description and drawings of the present application are used for distinguishing different objects or for distinguishing different processes of the same object, and are not used for describing a specific order of the objects. The terms "comprises" and "comprising," and any variations thereof, as referred to in the description of the present application, are intended to cover a 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 steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the application discloses fuse that can reset of new energy automobile circuit disconnection, can be used in new energy automobile distribution equipment electric power system, is applicable to rated voltage 440V-1000V AC/DC, under the condition that reaches 1000 volts and 1000 amperes, can reset fuse start-up time and do not exceed 15 milliseconds. 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 conduction plate 800, and a first return spring 900.
Referring to fig. 3, the upper case 100 forms a housing of the fuse, the stationary core mechanism 300 is fixedly disposed at the lower case 200, the movable core mechanism 400 is movably disposed at the upper case 100, and a gap 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 electrode signal terminal 510 and the negative electrode signal terminal 520 are respectively connected to two ends of the coil 500, the positive electrode terminal 600 and the negative electrode terminal 700 are arranged on the upper shell 100, a gap is formed between the positive electrode terminal 600 and the negative electrode terminal 700, and the conduction plate 800 is arranged on the movable iron core mechanism 400 and is driven by the movable iron core mechanism 400 to move towards a direction close to or far away from the positive electrode terminal 600 and the negative electrode terminal 700; when the conduction 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 conduction plate 800; the first return spring 900 is provided between the movable core mechanism 400 and the stationary core mechanism 300.
Specifically, the upper shell 100 and the lower shell 200 are connected by the fixing screws 210 to form a shell, the static iron core mechanism 300, the movable iron core mechanism 400, the coil 500, the conduction plate 800 and the first return spring 900 are encapsulated in the shell, 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 shell 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 the main circuit.
During wiring, the positive terminal 600 is connected to the positive pole of the main circuit, the negative terminal 700 is connected to the negative pole of the main circuit, the positive signal terminal 510 is connected to the positive pole of the signal circuit, and the negative signal terminal 520 is connected to the negative pole of the signal circuit. Under normal conditions, the signal circuit is always in a state that signal current flows, and the signal current flows in from the positive signal terminal 510 and flows out to the negative signal terminal 520 through the coil 500; when the coil 500 is energized, the stationary core mechanism 300 generates an electromagnetic attraction force, the movable core mechanism 400 is attracted to move toward the stationary core mechanism 300 under the action of the electromagnetic attraction force, the movable core mechanism 400 drives the conduction plate 800 to move, the conduction plate 800 is communicated with the positive terminal 600 and the negative terminal 700, and the main circuit is in a connected state at this time.
When the system detects that overload, short circuit, temperature and collision are sent, the system disconnects the signal circuit, signal current in the signal circuit disappears, current flowing into the positive electrode 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 at a certain interval under the action of the first reset spring 900, and drives the conduction plate 800 to be separated from the positive electrode terminal 600 and the negative electrode terminal 700 at a certain interval, so that the main circuit is disconnected, and the circuit is cut off in time.
Referring to fig. 4 and 5, the movable core mechanism 400 includes a first insulating block 410 and a movable core 420, the first insulating block 410 is disposed above the movable core 420, a positive terminal 600 and a negative terminal 700 are respectively disposed at two sides of the first insulating block 410, a conduction plate 800 is disposed on the first insulating block 410, two ends of the conduction plate 800 are respectively connected to the positive terminal 600 and the negative terminal 700 in a matching manner, a slider baffle 430 is disposed between the conduction plate 800 and the positive terminal 600 and the negative terminal 700, and the slider baffle 430 is slidably connected to the upper case 100; the two sides of the first insulating block 410 are provided with pushing blocks 440 matched with the sliding block baffle 430, when the movable iron core 420 moves towards the direction of the stationary iron core 320, the pushing blocks 440 push the sliding block baffle 430 to slide towards the two sides, so that the conduction plate 800 is communicated 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 block 430.
Since an arc is generated in the circuit in a high voltage and large current circuit, the arc may cause a misconnection between the positive terminal 600 and the negative terminal 700. Therefore, by disposing the positive terminal 600 and the negative terminal 700 at both sides of the first insulating block 410, the connection between the positive terminal 600 and the negative terminal 700 by the arc is prevented when the circuit is disconnected; also, by providing the slider baffles 430 between the conduction plate 800 and the positive and negative terminals 600 and 700, it is prevented that the arc connects the conduction plate 800 to the positive and negative terminals 600 and 700 when the circuit is opened; and thus the conduction plate 800 can be spaced apart from the positive and negative terminals 600 and 700 by a small distance, 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 plate-shaped, and the slider baffle 430 is made of PPS plastic and is door-shaped, and is disposed on two sides of the first insulating block 410 and slidably connected to the upper case 100. When the conduction plate 800 is in a spaced state from the positive terminal 600 and the negative terminal 700, the main circuit is disconnected, and the slider baffle 430 covers the positive terminal 600 and the negative terminal 700 to reduce misconnection; one end of the sliding block baffle 430 close to the first insulating block 410 is a round angle 431, a guide arc surface 441 is arranged below a pushing block 440 of the first insulating block 410, and when the first insulating block 410 moves downwards along with the movable iron core 420, the sliding block baffle 430 is extruded towards two sides by the pushing block 440 under the guide effect of the guide arc surface 441, so that the conduction plate 800 is connected with the positive terminal 600 and the negative terminal 700.
Through setting up insulating slider baffle 430, make to switch on board 800 and positive terminal 600 and can not switch on for the second time after the disconnection by the less distance in interval between the negative terminal 700 and the positive terminal to can make the size of fuse littleer, fail safe nature is also higher.
Further, referring to fig. 3, contact bumps 530 are disposed at positions where the conduction plate 800, the positive terminal 600, and the negative terminal 700 are connected to each other; when the main circuit is in an open state, the slider baffles 430 are covered over the contact bumps 530 of the positive and negative terminals 600 and 700 to further prevent arcing and to make better contact when the main circuit is connected.
Referring to fig. 2, T-shaped connection blocks 432 are disposed at both sides of the slider barrier 430, the upper case 100 is provided with a T-shaped groove 120 engaged with the T-shaped connection blocks 432, and the slider barrier 430 slides in the T-shaped groove 120 through the T-shaped connection blocks 432 to partition or not partition the conduction plate 800. Through the cooperation of T type connecting block 432 with T type groove 120, make slider baffle 430 slide more stably. Further, the elastic reset member for resetting the driving slider block 430 is a second reset spring 110, and the second reset spring 110 is disposed between the T-shaped connecting block 432 and the sidewall of the T-shaped groove 120, so that when the first insulating block 410 moves upward due to the reset of the first reset spring 900, the driving slider block 430 slides again between the conduction plate 800 and the positive terminal 600 and the negative terminal 700, thereby preventing the generation of an 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, the coil 500 is sleeved on the lower portion of the second insulating block 310, a through hole 311 for the movable core 420 to pass through is formed in the middle of the second insulating block 310, and a side groove 312 for embedding a positive signal terminal 510 and a negative signal terminal 520 is formed on the periphery 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, one end of the first return spring 900 abuts against the second insulating block 310, and the other end abuts against the movable iron core 420. The movable iron core 420 moves towards the direction close to or far away from the stationary iron core 320 through the through hole 311 on the second insulating block 310, when the movable iron core 420 is close to the stationary iron core 320, and the main circuit is communicated, the first return spring 900 is in a compressed state, and after the electromagnetic force disappears, the first return spring 900 resets to drive the movable iron core 420 to move towards the direction far away from the stationary 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 in a strip shape, the positive signal terminal 510 and the negative signal terminal 520 are respectively connected to two ends of the coil 500 through conductors and are located on the same horizontal line, the positive signal terminal 510 and the negative signal terminal 520 are respectively located in the side grooves 312 on two sides of the second insulating block 310, the upper and lower sides of the side grooves 312 are limited, and the two sides of the side grooves 312 are limited through the matching of the lower shell 200 and the groove bottom of the side groove 312, so that the structure of the insulating block is stable.
Further, as can be seen from fig. 2, a spring groove 313 is formed in the middle of the second insulating block 310, and the first return spring 900 is disposed in the spring groove 313 to limit the first return spring 900, so that the structural stability is improved.
Specifically, the first return spring 900 is a tower 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 conduction plate 800 are in a connected state with the positive terminal 600 and the negative terminal 700, respectively, for a long time, and may cause poor contact after a certain period of use or wear after a certain period of use, resulting in loose contact.
Referring to fig. 4, in order to make the connection between the conduction plate 800 and the positive terminal 600 and the negative terminal 700 tighter, the first insulating block 410 is provided with a movable cavity 411, the conduction plate 800 is movably disposed in the movable cavity 411, a spring fulcrum 810 is disposed in the middle of the conduction plate 800, and a fastening spring 820 is disposed between the spring fulcrum 810 and the upper wall of the movable cavity 411.
Specifically, a concave portion is arranged in the middle of the conduction plate 800 and serves as a spring fulcrum 810, a circular bump 412 is arranged on the upper wall of the movable cavity 411, one end of the abutting spring 820 is sleeved on the circular bump 412, the other end of the abutting spring 820 abuts on the spring fulcrum 810, and the abutting spring 820 is limited through two ends of the conduction plate 800 and the circular bump 412. In this embodiment, the width of the recess of the conduction plate 800 corresponds to the width of the upper wall of the movable cavity 411, and when moving, the upper wall of the movable cavity 411 may be fitted into the recess of the conduction plate 800 so that the conduction plate 800 can move a greater distance.
When the main circuit is connected, the conduction plate 800 moves downwards to be connected with the positive terminal 600 and the negative terminal 700, the abutting spring 820 is compressed, the conduction plate 800 is under the action of the abutting spring 820 to enable the contact salient point 530 of the conduction plate 800 to be connected with the contact salient points 530 of the positive terminal 600 and the negative terminal 700 more tightly, when the contact salient points 530 are worn due to long-time use, the contact salient points can still be in good contact through the restoration of larger length of the abutting spring 820, and therefore the situation that contact failure occurs due to poor contact of two ends or abrasion after a certain period of use is avoided.
Further, mounting holes 220 are formed in two sides of the lower case 200, the mounting holes 220 are long, when the fuse is mounted on a circuit, screws penetrate through the long mounting holes 220, and the screws can move in the mounting holes 220, so that the fuse can be finely adjusted in the mounting positions.
The implementation principle of the resettable fuse for circuit disconnection of the new energy automobile is as follows: the fuse protector utilizes the technical principle of electromagnetic force, breaks through the problem that the existing fuse protector cannot be reset, can be reset and repeatedly used, saves cost and resources, and improves the manufacturing safety; and can be used in cooperation with various abnormal circuit signals such as overload, short circuit, temperature, collision and the like; after the circuit is disconnected, the circuit is insulated by the insulating baffle, so that the circuit cannot be conducted for the second time, and the safety and reliability are high; and set up and support the spring 820 tightly, make the fuse still can have good contact under long-time use, prevent that both ends contact failure or use wearing and tearing after a certain period and lead to the condition emergence of contact failure.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a fuse that can reset of new energy automobile circuit disconnection which characterized in that: the magnetic control switch 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 return 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 moving iron core mechanism (400) is movably arranged on the upper shell (100), and a gap is formed between the moving 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 gap is formed 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 moves towards a direction close to or far away from the positive terminal (600) and the negative terminal (700) under the driving of the movable iron core mechanism (400); when the conduction 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 conduction plate (800);
the first return spring (900) is arranged between the moving iron core mechanism (400) and the static iron core mechanism (300).
2. The new energy automobile circuit breaking resettable fuse of claim 1, wherein: 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 terminal (600) and the negative terminal (700) are respectively arranged on two sides of the first insulating block (410), the conduction plate (800) is arranged on the first insulating block (410), two ends of the conduction plate (800) are respectively matched and connected with the positive terminal (600) and the negative terminal (700), a sliding block baffle (430) is arranged between the conduction plate (800) and the positive terminal (600) and between the conduction plate and the negative terminal (700), and the sliding block baffle (430) is connected to the upper shell (100) in a sliding manner; pushing blocks (440) matched with the sliding block baffle (430) are arranged on two sides of the first insulating block (410), and when the movable iron core (420) moves towards the direction of the static iron core mechanism (300), the pushing blocks (440) push the sliding block baffle (430) to slide towards two sides, so that the conducting plate (800) is communicated with the positive terminal (600) and the negative terminal (700); the upper shell (100) is provided with an elastic reset piece for resetting the sliding block baffle (430).
3. The new energy automobile circuit breaking resettable fuse of claim 2, wherein: the insulation structure is characterized in that a movable cavity (411) is formed in the first insulation block (410), the conduction plate (800) is movably arranged in the movable cavity (411), a spring fulcrum (810) is arranged in the middle of the conduction plate (800), and a tight spring (820) is arranged between the spring fulcrum (810) and the upper wall of the movable cavity (411).
4. The new energy automobile circuit breaking resettable fuse of claim 1, wherein: contact bumps (530) are arranged at the positions where the conduction plate (800), the positive terminal (600) and the negative terminal (700) are connected with each other.
5. The new energy automobile circuit breaking resettable fuse of claim 1, wherein: two sides of the lower shell (200) are provided with long mounting holes (220).
6. The new energy automobile circuit breaking resettable fuse of claim 2, wherein: be provided with T type connecting block (432) on slider baffle (430), epitheca (100) be provided with T type connecting block (432) complex T type groove (120).
7. The new energy automobile circuit breaking resettable fuse of claim 6, 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).
8. The new energy automobile circuit breaking resettable fuse of claim 2, wherein: quiet iron core mechanism (300) include second insulator block (310) and quiet iron core (320), second insulator block (310) set up on quiet iron core (320), coil (500) cover is established the lower part of second insulator block (310), the confession has been seted up in the middle of second insulator block (310) move through-hole (311) that iron core (420) passed, the week side of second insulator block (310) is provided with the confession anodal signal terminal (510) with side channel (312) of negative pole signal terminal (520) embedding.
9. The new energy vehicle circuit breaking resettable fuse of claim 8, wherein: the middle part of the second insulating block (310) is provided with a spring groove (313), and the first return spring (900) is arranged in the spring groove (313).
10. The new energy vehicle circuit breaking resettable fuse of claim 9, 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 true CN115692126A (en) | 2023-02-03 |
| CN115692126B 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 |
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| Publication number | Publication date |
|---|---|
| CN115692126B (en) | 2024-03-19 |
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