CN113675050A

CN113675050A - Overvoltage protection device, charging pile with overvoltage protection device and charging method

Info

Publication number: CN113675050A
Application number: CN202110922127.9A
Authority: CN
Inventors: 华叙亮
Original assignee: Suzhou Yungang Intelligent Technology Co ltd
Current assignee: Suzhou Yungang Intelligent Technology Co ltd
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2021-11-19

Abstract

The invention discloses an overvoltage protection device, which relates to the technical field of charging piles and comprises the following components: an electricity control mechanism and a fusing mechanism. The electricity control mechanism has: casing, knob, bull stick, lead electrical pillar, fixed disk, cross electric dish, rotary rod. According to the invention, the conducting post in the rotation electricity control mechanism drives the rotating rod to realize the control of the turn-off of the conducting post on the rotating rod and the overcurrent disk, the rotating rod is attracted under the action of the electromagnet which generates magnetic force when the rotating rod is electrified, the continuous electrifying process is ensured, the chargeable operation is completed, and finally, after the voltage is too large and the fuse wire in the fusing mechanism is fused, the action of the magnetic trigger bias elastic piece is eliminated through the electricity loss of the electromagnet, so that the rotating rod is reset, the overcurrent disk is powered off, the automatic brake breaking is realized, and the possible current influence when parts are replaced and the possible current influence of a charging plug connected to the charging pile is avoided, and the life health of workers is harmed.

Description

Overvoltage protection device, charging pile with overvoltage protection device and charging method

Technical Field

The invention relates to the technical field of charging piles, in particular to an overvoltage protection device.

Background

The electric automobile is a vehicle which takes a vehicle-mounted power supply as power and drives wheels to run by using a motor, and meets various requirements of road traffic and safety regulations. An electric drive and control system, a mechanical system such as a drive transmission, a working device for performing a predetermined task, and the like. The automobile has a small influence on the environment, so that the prospect is widely seen, but the current technology is not mature. With the development of electric automobile technology, especially the increasing of the national atmospheric pollution control, the electric automobile as one of the best substitute products of the traditional power automobile develops rapidly. The charging system is used for providing energy supply for the operation of the electric automobile, is an important basic supporting system of the electric automobile, is also an important link in the commercialization and industrialization processes of the electric automobile, and has very important social benefits and economic benefits as an important matched infrastructure necessary for developing the electric automobile in the charging system.

The wireless charging technology is derived from a wireless electric energy transmission technology and can be divided into a low-power wireless charging mode and a high-power wireless charging mode, wherein the low-power wireless charging mode usually adopts an electromagnetic induction mode, such as a Qi mode for charging a mobile phone, but the Zhongxing wireless charging mode of an electric automobile adopts an induction mode. The high-power wireless charging usually adopts a resonant mode, and the power supply equipment transmits energy to a power utilization device, and the device charges a battery by using the received energy and simultaneously provides the power utilization device for self operation.

When wireless charging stake produced the trouble or the misoperation leads to voltage input too high (also the output voltage of wireless charging stake's power too high) time, the resonance process of charging and discharging mutually brings the impact that will increase for wireless charging stake, and the voltage peak value of wireless charging stake output this moment can be very high to cause irreversible damage to wireless charging stake's power transmission part, the security of assurance wireless charging process that can not be fine. Existing charging piles are generally provided with an overvoltage protector, wherein the overvoltage protector refers to a protection mode for disconnecting a power supply or reducing the voltage of controlled equipment when the voltage of a protected line exceeds a preset maximum value. At present, a common mode in the market is to break a circuit by taking a metal conductor as a melt, connect the metal conductor in series in the circuit, and when overload or short-circuit current passes through the melt, the melt is heated and fused, so that a certain protection effect is achieved on a power system.

Consequently adopt overvoltage protector, when voltage surpassed the setting value, can the auto-power-off, protect charging pile, but charging plug generally still connects on charging pile, has the potential safety hazard to it is removable after the realization is cut off the power supply comprehensively to need pull down the electric brake most earlier when the renewal part, forget the electric brake and have very big potential safety hazard when changing when the staff, very easily take place to electrocute the risk, seriously harm staff's life health.

Disclosure of Invention

One purpose of the invention is to solve the problem that the overvoltage protection in the prior art cannot disconnect the electric brake, so that potential safety hazard exists.

The invention also aims to provide a charging pile with an overvoltage protection device.

The invention also aims to provide an overvoltage protection charging method.

In order to achieve one of the purposes, the invention adopts the following technical scheme: an overvoltage protection device comprises an electricity control mechanism and a fusing mechanism. The electricity control mechanism has: casing, knob, bull stick, lead electrical pillar, fixed disk, cross electric dish, rotary rod.

The knob is located outside the shell, the rotating rod is connected with the knob, and the rotating rod penetrates into the shell. The rotating rod is connected with the conductive column in the shell.

The fixed disk is fixed in the shell, the conductive column penetrates through the fixed disk, and a biasing elastic piece is arranged between the conductive column and the fixed disk.

Cross the electricity dish setting and be in fixed disk one side, cross the accommodation space that has in the electricity dish, lead electrical pillar with the reference column that the fixed disk was equipped all pass extremely in the accommodation space, be located accommodation space leads electrical pillar fixedly connected with conducting ring, conducting ring both sides swing joint has the movable rod. The one end of rotary rod with reference column swing joint, the other end of rotary rod with movable rod swing joint and the rotary rod with cross the electricity dish inner wall opposite face and be equipped with the conducting strip, the rotary rod with cross the clearance between the electricity dish, the conducting strip with the movable rod contacts each other, through the conducting strip with cross the inner wall contact of electricity dish, realize with the electric conduction.

The inner wall of the charging tray is provided with an electromagnet, and the electromagnet is positioned on the side surface of the rotating rod.

The fusing mechanism is connected with the electricity control mechanism, the fusing machine is provided with a metal head and a fusing wire, the metal head on the right side is connected with the electricity passing disc, and the fusing wire is arranged between the two metal heads.

The outer surfaces of the electric plate and the fixed plate are coated with insulating materials, and the fixed plate is coated with the electric plate.

In the technical scheme, when the current needs to be switched on during charging, the knob is rotated, so that the rotating rod rotates to drive the conductive column to rotate, the conductive column rotates to pull the offset elastic piece to curl and accumulate the force, the conductive column also drives the conductive ring to rotate while rotating, and under the condition that one end of the rotating rod is limited by the positioning column of the fixed disk, the conductive ring drives the movable rod to outwards push the other end of the rotating rod, so that the conductive sheet arranged on the side of the rotating rod is in contact with the inner side wall of the over-current disk. At the moment, the live conductive column connected with the power supply conducts current to the conductive ring, the conductive ring and the movable rod, and then the movable rod is in contact with the rotary rod or the conductive sheet, so that the current is conducted to the electrified disc by the conductive sheet, and finally the current passing through the electrified disc is output outwards along the metal head and the fuse wire of the fusing mechanism to be charged.

After the current of the over-current disc is switched on, the electromagnet of the over-current disc is electrified to generate magnetism, the rotating rod is attracted, and the rotating rod is prevented from resetting after the knob is loosened.

When voltage is too big, the fuse in the fuse-link mechanism is fused, and the electro-magnet of passing the electric disk loses the electricity and subsides magnetism, drives under the effect of biasing bullet piece and leads the electrical pillar reversal to make the conducting ring restore to the throne through the conducting strip of movable rod pulling rotary rod and rotary rod side, automatic breaking brake, when avoiding the renewal part and still connect charging plug on filling electric pile probably has the electric current influence, endangers staff's life health.

Further, in the embodiment of the present invention, the knob has a moving space therein, the rotating rod extends into the moving space, and the rotating rod is rotatably connected to the knob. The rotating rod extending into the movable space is connected with a helical gear, a limit rod movably connected is arranged on the movable space, the limit rod is obliquely clamped into a tooth groove of the helical gear to limit clockwise or anticlockwise rotation of the helical gear (the helical gear is limited to be incapable of rotating from anticlockwise in the attached figure 10 of the invention).

When the current needs to be switched on when charging is needed, and the knob is rotated anticlockwise, the bevel gear on the rotating rod is limited by the limiting rod in the knob, so that the rotating rod also rotates anticlockwise to conduct force on the conductive column. And when the fuse link is fused, lead electrical pillar and drive the bull stick rotation simultaneously in biasing bullet piece effect clockwise rotation that resets, because of the helical gear is not restricted by the gag lever post in the knob in clockwise, consequently the bull stick can be at the automatic re-setting under the circumstances that need not drive knob pivoted. Through the mode, the situation that the knob is difficult to rotate due to rusting or sundries blocking can be avoided, the rotating rod and the conductive column cannot reset, and further cannot be disconnected, and finally the safety of workers is threatened.

The invention has the beneficial effects that:

according to the invention, the conducting post in the rotation electricity control mechanism drives the rotating rod to realize the control of the turn-off of the conducting post on the rotating rod and the overcurrent disk, the rotating rod is attracted under the action of the electromagnet which generates magnetic force when the rotating rod is electrified, the continuous electrifying process is ensured, the chargeable operation is completed, and finally, after the voltage is too large and the fuse wire in the fusing mechanism is fused, the action of the magnetic trigger bias elastic piece is eliminated through the electricity loss of the electromagnet, so that the rotating rod is reset, the overcurrent disk is powered off, the automatic brake breaking is realized, and the possible current influence when parts are replaced and the possible current influence of a charging plug connected to the charging pile is avoided, and the life health of workers is harmed. In addition, the conducting plate and the overcurrent disk are controlled to be turned off in a rotating mode, so that on one hand, the overcurrent disk is favorable for coating the fixed disk to form a sealed space, and the influence of current leakage caused by external rainwater intrusion is reduced; on the other hand, the connection clearance between the rotating rod and the shell can be reduced in a rotating mode, so that the influence of current leakage caused by external rainwater intrusion is also reduced. Is beneficial to ensuring the life health of the staff.

In order to achieve the second purpose, the invention adopts the following technical scheme: a charging pile, wherein, this charging pile has the overvoltage crowbar of any one technical scheme of above-mentioned invention mesh.

In order to achieve the third object, the invention adopts the following technical scheme, which is based on any one of the technical schemes of the invention objects, and the overvoltage protection charging method of the overvoltage protection device comprises the following steps:

when the charging is needed, the current is switched on, the knob is rotated, the rotating rod is rotated to drive the conductive column to rotate, the conductive column rotates to pull the offset elastic piece to curl and accumulate force, the conductive column also drives the conductive ring to rotate while rotating, under the condition that one end of the rotating rod is limited by the positioning column of the fixed disk, the conductive ring drives the movable rod to outwards push the other end of the rotating rod, and the conductive sheet arranged on the side of the rotating rod is in contact with the inner side wall of the charging disk;

at the moment, the current is conducted to the conducting ring by the conducting post which is connected with the power supply and is electrified, then the current is conducted to the movable rod by the conducting ring, the conducting plate is conducted to the electric disk by the contact of the movable rod and the rotating rod or the conducting plate, the current passing through the electric disk is finally output outwards along the metal head and the fuse wire of the fuse mechanism for charging, after the current passing through the electric disk is switched on, the electromagnet of the electric disk is electrified to generate magnetism to attract the rotating rod, and the rotating rod is prevented from resetting after the knob is loosened;

when voltage is too big, make the fuse in the fuse-link mechanism by the fusing, the electro-magnet of crossing the electric disk loses the electricity and fades the magnetism this moment, drives under the effect of biasing bullet piece and leads the electrical pillar reversal, thereby makes the conducting ring pass through the conducting strip that movable rod pulling rotary rod and rotary rod side and resets, automatic breaking.

Drawings

Fig. 1 is a schematic plan view of a charging pile and an overvoltage protection device according to an embodiment of the invention.

Fig. 2 is a schematic plan view of an overvoltage protection device according to an embodiment of the invention.

Fig. 3 is a schematic side view of an overvoltage protection device according to an embodiment of the invention.

Fig. 4 is a schematic side view of an overvoltage protection device according to an embodiment of the invention.

FIG. 5 is a schematic structural diagram of a fixing disk according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a power passing disc according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of the movement effect in the passing board according to the embodiment of the present invention.

FIG. 8 is a side view of a knob according to an embodiment of the present invention.

FIG. 9 is a schematic side view of a knob according to an embodiment of the present invention.

FIG. 10 is a schematic view of the fitting connection between the bevel gear and the limiting rod according to the embodiment of the present invention.

In the attached drawings

100. Overvoltage protector 200, fill electric pile

10. Electric control mechanism 11, knob 12 and rotating rod

13. Conductive post 14, fixed disk 141, and insulating cover

15. Offset elastic piece 16, positioning column 17 and overcurrent disk

171. Accommodating space 172, electromagnet 18, and rotating rod

181. Conducting strip 19, conducting ring 191 and movable rod

20. Fusing mechanism 21, metal head 22, and fuse

23. Sealing door

30. Input cable 40 and output cable

111. Movable space 112, limit rod 121 and bevel gear

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clear and fully described, embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. But it is obvious. To one of ordinary skill in the art, the embodiments may be practiced without limitation to these specific details. In some instances, well-known over-voltage protection charging methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.

The first embodiment is as follows:

an overvoltage protection device 100, as shown in fig. 1-4, includes an electric control mechanism 10 and a fuse mechanism 20. The electricity control mechanism 10 has: the device comprises a shell, a knob 11, a rotating rod 12, a conductive column 13, a fixed disk 14, a current passing disk 17 and a rotating rod 18.

As shown in fig. 3 and 4, the knob 11 is located outside the housing, the rotating rod 12 is connected with the knob 11, and the rotating rod 12 penetrates into the housing. The rotating rod 12 is connected to a conductive post 13 in the housing. An input cable 30 is connected to the conductive post 13, and the input cable 30 is connected to a power supply. As shown in fig. 5, the fixed disk 14 is fixed in the housing, the conductive posts 13 penetrate the fixed disk 14, and the biasing springs 15 are disposed between the conductive posts 13 and the fixed disk 14.

As shown in fig. 4, 5, and 6, the power transmission disc 17 is disposed on one side of the fixed disc 14, the power transmission disc 17 has an accommodating space 171 therein, the conductive posts 13 and the positioning posts 16 disposed on the fixed disc 14 all penetrate into the accommodating space 171, the conductive posts 13 located in the accommodating space 171 are fixedly connected with the conductive ring 19, and two sides of the conductive ring 19 are movably connected with the movable rods 191. One end of the rotating rod 18 is movably connected with the positioning column 16, the other end of the rotating rod 18 is movably connected with the movable rod 191, a conducting strip 181 is arranged on the opposite surface of the rotating rod 18 and the inner wall of the electric disk 17, a gap is formed between the rotating rod 18 and the electric disk 17, the conducting strip 181 is in contact with the movable rod 191, and the electric conduction is realized by the contact of the conducting strip 181 and the inner wall of the electric disk 17.

An electromagnet 172 is arranged on the inner wall of the charging tray 17, and the electromagnet 172 is positioned on the side surface of the rotating rod 18.

The fusing mechanism 20 is connected with the electricity control mechanism 10, the fusing machine is provided with a metal head 21 and a fusing wire 22, the metal head 21 on the right side is connected with the electricity passing disc 17, and the fusing wire 22 is installed between the two metal heads 21. The output cable 40 is connected to the metal head 21 on the left side of the fuse 22.

The outer surfaces of the charging tray 17 and the fixed tray 14 are coated with an insulating material (not shown), and the charging tray 17 coats the fixed tray 14.

The implementation steps are as follows:

when charging is required and current is switched on, as shown in fig. 7, the knob 11 is rotated to rotate the rotating rod 12 to drive the conductive post 13 to rotate, the conductive post 13 rotates to pull the biasing elastic member 15 to curl and accumulate power, the conductive post 13 rotates and also drives the conductive ring 19 to rotate, under the limitation of the positioning column 16 of the fixed disk 14 at one end of the rotating rod 18, the conductive ring 19 drives the movable rod 191 to push the other end of the rotating rod 18 outwards, so that the conductive plate 181 arranged at the side of the rotating rod 18 contacts with the inner side wall of the charging tray 17. At this time, the conductive column 13 connected to the power supply and charged conducts the current to the conductive ring 19, and the movable rod 191, and then the conductive rod 191 contacts the rotating rod 18 or the conductive sheet 181, so that the conductive sheet 181 conducts the current to the electric disk 17, and the current passing through the electric disk 17 is finally output outwards along the metal head 21 and the fusible link 22 of the fusing mechanism 20 for charging.

After the current of the over-current disc 17 is switched on, the electromagnet 172 of the over-current disc 17 is electrified to generate magnetism, so that the rotating rod 18 is attracted, and the rotating rod 18 is prevented from being reset after the knob 11 is loosened.

When voltage is too large, the fuse wire 22 in the fusing mechanism 20 is fused, the electromagnet 172 of the over-current disc 17 loses power and loses magnetism, and the conductive column 13 is driven to rotate reversely under the action of the bias elastic piece 15, so that the conductive ring 19 is reset through the movable rod 191 to pull the rotary rod 18 and the conductive sheet 181 on the side of the rotary rod 18, the brake is automatically switched off, and the situation that the charging plug connected to the charging pile 200 is influenced by current and harms the life health of workers during part replacement is avoided.

According to the invention, the conducting post 13 in the rotation control electric mechanism 10 drives the rotating rod 18 to control the turn-off of the conducting post 181 on the rotating rod 18 and the overcurrent disk 17, and the rotating rod 18 is attracted under the action of the electromagnet 172 which generates magnetic force when being electrified, so that the continuous electrifying process is ensured, the chargeable operation is completed, and finally, after the voltage is too high and the fuse wire 22 in the fusing mechanism 20 is fused, the electromagnet 172 loses power to eliminate the action of the magnetic trigger bias elastic piece 15, so that the rotating rod 18 is reset, the overcurrent disk 17 loses power, the automatic brake breaking is realized, and the current influence possibly existing in the process of replacing parts and a charging plug connected to the charging pile 200 is avoided, and the life health of workers is harmed. In addition, the conducting strip 181 and the overcurrent disk 17 are controlled to be turned off in a rotating mode, so that on one hand, the overcurrent disk 17 is favorable for covering the fixed disk 14 to form a sealed space, the influence of current leakage caused by external rainwater intrusion is reduced, and the utilization rate of the space can be increased; on the other hand, the connection clearance between the rotating rod 12 and the shell can be reduced through a rotating mode, so that the influence of external rainwater invasion and current leakage is also reduced. Is beneficial to ensuring the life health of the staff.

As shown in fig. 4, the conductive column 13, the conductive ring 19, the movable rod 191, the conductive sheet 181 and the over-current pad 17 are made of conductive materials. The conductive posts 13 and the positioning posts 16 are not in contact with the over-current pad 17, so as to avoid directly conducting electricity to the over-current pad 17.

As shown in fig. 4, the rotating rod 12 is made of an insulating material, and the diameter of the knob 11 is larger than that of the rotating rod 12. Make bull stick 12 through insulating material, can avoid leading-in to the knob 11 with the electric current on, cause the potential safety hazard to the personnel to through setting the diameter with knob 11 to the size that the diameter is greater than bull stick 12, can block external rainwater directly to invade to the junction of bull stick 12 and casing to a certain extent, get into the casing at last, cause the potential safety hazard.

As shown in fig. 5, the outer surface of the conductive post 13 at the fixed disk 14 is provided with an insulating sleeve 141, and the biasing spring 15 is connected to the insulating sleeve 141. Can avoid the electric current to stretch towards the casing through insulating cover 141, cause the potential safety hazard to operating personnel.

As shown in fig. 3, the exterior of the fusing mechanism 20 is hinged with a sealing door 23, the fusible link 22 is sealed by the sealing door 23, and the fusible link 22 is easily maintained and replaced by opening the sealing door 23.

Example two:

an overvoltage protector has the same characteristic structure as the first embodiment, wherein, as shown in fig. 8, 9 and 10, a knob 11 is provided with a movable space 111, a rotating rod 12 extends into the movable space 111, and the rotating rod 12 is rotatably connected with the knob 11. The rotating rod 12 extending into the movable space 111 is connected with a helical gear 121, the movable space 111 is provided with a movably connected limiting rod 112, the limiting rod 112 is obliquely clamped into a tooth groove of the helical gear 121 to limit the clockwise or counterclockwise rotation of the helical gear 121 (the helical gear 121 is limited by the invention 10 in the invention to limit the rotation of the helical gear 121 from the counterclockwise direction).

When the knob 11 is turned counterclockwise for charging, the bevel gear 121 on the rotary rod 12 is limited by the limiting rod 112 in the knob 11, and therefore, the conductive rod 13 is also turned counterclockwise for transmitting force. When the fuse 22 is fused, the conductive post 13 is reset by the bias spring 15 to rotate clockwise and drive the rotating rod 12 to rotate, and the helical gear 121 is not limited by the limiting rod 112 in the knob 11 in the clockwise direction, so that the rotating rod 12 can be automatically reset without driving the knob 11 to rotate. Through the mode, the situation that the rotary knob 11 is difficult to rotate due to rusting or sundries blockage can be avoided, the rotary rod 12 and the conductive column 13 cannot reset, and further the brake cannot be switched off, so that the safety of workers is threatened finally.

Example three:

a charging pile 200 is shown in fig. 1, wherein the charging pile 200 has the overvoltage protection device 100 according to any one of the first embodiment and/or the second embodiment.

Example four:

an overvoltage protection charging method of the overvoltage protection device 100 according to any one of the embodiments includes the following steps:

when the charging is needed and the current is switched on, the knob 11 is rotated, so that the rotating rod 12 rotates to drive the conductive column 13 to rotate, the conductive column 13 rotates to pull the offset elastic piece 15 to curl and accumulate the force, the conductive column 13 also drives the conductive ring 19 to rotate while rotating, under the limitation of the positioning column 16 of the fixed disk 14 at one end of the rotating rod 18, the conductive ring 19 drives the movable rod 191 to push the other end of the rotating rod 18 outwards, and the conductive sheet 181 arranged on the side of the rotating rod 18 is in contact with the inner side wall of the charging tray 17;

at this time, the current is transmitted to the conductive ring 19 by the conductive post 13 which is connected with the power supply and is electrified, then is transmitted to the movable rod 191 by the conductive ring 19, and is transmitted to the electric disk 17 by the conductive plate 181 through the contact between the movable rod 191 and the rotating rod 18 or the conductive plate 181, so that the current passing through the electric disk 17 is finally output outwards along the metal head 21 and the fusible link 22 of the fusing mechanism 20 for charging, wherein after the current passing through the electric disk 17 is switched on, the electromagnet 172 of the electric disk 17 is electrified to generate magnetism to attract the rotating rod 18, and the rotating rod 18 is prevented from being reset after the knob 11 is loosened;

when the voltage is too high, the fuse 22 in the fusing mechanism 20 is fused, at this time, the electromagnet 172 of the overcurrent disk 17 loses power and loses magnetism, the conductive column 13 is driven to rotate reversely under the action of the biasing elastic piece 15, and therefore the conductive ring 19 pulls the rotating rod 18 and the conductive sheet 181 on the rotating rod 18 side through the movable rod 191 to reset, and automatic switching-off is achieved.

Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.

Claims

1. An overvoltage protection device, comprising:

an electricity control mechanism having:

a housing;

a knob located outside the housing;

the rotating rod is connected with the knob and penetrates into the shell;

the conductive column is connected with the rotating rod;

the fixed disk is fixed in the shell, the conductive column penetrates through the fixed disk, and a biasing elastic piece is arranged between the conductive column and the fixed disk;

the electric disk is arranged on one side of the fixed disk, an accommodating space is formed in the electric disk, the conductive posts and the positioning posts arranged on the fixed disk penetrate into the accommodating space, the conductive posts positioned in the accommodating space are fixedly connected with a conductive ring, and two sides of the conductive ring are movably connected with movable rods;

a gap is formed between the rotating rod and the power passing disc, one end of the rotating rod is movably connected with the positioning column, the other end of the rotating rod is movably connected with the movable rod, a conducting strip is arranged on the opposite surface of the rotating rod and the inner wall of the power passing disc, the conducting strip is contacted with the movable rod, and the conducting strip is contacted with the inner wall of the power passing disc to realize the conduction of electricity;

an electromagnet is arranged on the inner wall of the charging tray and is positioned on the side surface of the rotating rod;

a fusing mechanism, the fusing mechanism is connected with the electricity control mechanism, and the fusing machine is provided with:

the metal head is connected with the over-current disc;

and the fuse wire is connected with the metal head.

2. The overvoltage protection device of claim 1, wherein an input cable is connected to said conductive post, said input cable being connected to a power source.

3. The overvoltage protection device of claim 1, wherein an output cable is connected to the fuse side.

4. The overvoltage protection device of claim 1, wherein the conductive posts and the posts do not contact the overpotential pad, preventing direct conduction of electricity to the overpotential pad.

5. The overvoltage protection device of claim 1, wherein the conductive post, the conductive ring, the movable bar, the conductive sheet, and the overvoltage pad are made of conductive materials.

6. The overvoltage protection device of claim 1, wherein the turn bar is made of an insulating material and the knob has a diameter that is larger than the turn bar.

7. The overvoltage protection device of claim 1, wherein an insulating sleeve is disposed on an outer surface of the conductive post at the fixed disk, and the biasing spring is connected to the insulating sleeve.

8. The overvoltage protection device of claim 1, wherein an exterior of the fuse mechanism is hinged with a sealing door through which the fuse wire is sealed and through which the fuse wire is easily repaired and replaced by opening the sealing door.

9. A charging post having an overvoltage protection device as claimed in any one of claims 1 to 8.

10. An overvoltage protection charging method based on the overvoltage protection device of any one of claims 1 to 8, wherein the method comprises the following steps: