CN212422859U - Safety protection type charging pile for electric automobile - Google Patents

Abstract

The utility model provides a safety protection type fills electric pile for electric automobile, it includes: the charging pile comprises a charging pile body, heating equipment and cooling equipment, wherein the heating equipment and the cooling equipment are arranged in the charging pile body; the cooling device comprises a heat-conducting substrate and a heat pipe, wherein an accommodating cavity is formed in the heat-conducting substrate, the heat pipe comprises an evaporation section, a condensation section and a phase-change working medium which circularly flows between the evaporation section and the condensation section, the evaporation section is embedded in the accommodating cavity of the heat-conducting substrate, a heat-conducting curing layer formed after resin impregnation liquid is cured is filled in a gap between the accommodating cavity and the evaporation section, and the condensation section extends out of the charging pile body; the outer surface of the heat-conducting substrate is provided with a heat-conducting material, the heat-conducting material is in contact with a heating part of the heating equipment in a fitting manner, and the heat-conducting material comprises a graphite film, a thermal phase-change material or heat-conducting silicone grease; be provided with heat reflection thermal barrier coating on the outer wall of filling the electric pile body, implement the reflection to solar radiation and ground radiation. This fill electric pile can prevent high temperature or spontaneous combustion.

Description

Safety protection type charging pile for electric automobile

Technical Field

The utility model relates to a fill electric pile technical field, concretely relates to safety protection type fills electric pile for electric automobile.

Background

The function of charging pile is similar to the oiling machine inside the gas station, can be fixed on the ground or on the wall, is installed in the parking lot or the charging station of public buildings and residential districts, can charge for the electric automobile of various models according to different voltage levels, the input and the alternating current network lug connection of charging pile, the output all is equipped with the charging plug and is used for charging for electric automobile.

Along with the rapid development of the charging pile, as high-voltage and high-power supply equipment, the charging safety of the charging pile is gradually emphasized by people, and particularly due to the characteristics of large charging current, high voltage, long charging time and the like, when faults such as short circuit, overload, overvoltage and the like occur, a lead can be caused to spontaneously combust to generate a fire disaster. Along with the requirement of a user on charging time, the quick charging and super quick charging functions become the development trend in the future, the temperature in the charging pile is necessarily overhigh, and the safety and the durability of the charging pile are affected by high temperature, so that the heat management becomes a necessary choice.

SUMMERY OF THE UTILITY MODEL

The utility model provides a safety protection type fills electric pile for electric automobile solves the car and fills electric pile in use problem that the high temperature.

To achieve the above object, the utility model provides a fill electric pile for electric automobile, it includes: the charging pile comprises a charging pile body, heating equipment arranged inside the charging pile body, and cooling equipment for cooling the heating equipment; the heating equipment comprises a main controller, the cooling equipment comprises a heat-conducting substrate and a heat pipe, an accommodating cavity is formed in the heat-conducting substrate, the heat pipe comprises an evaporation section, a condensation section and a phase-change working medium which flows between the evaporation section and the condensation section in a circulating mode, the evaporation section is embedded in the accommodating cavity of the heat-conducting substrate, a heat-conducting curing layer formed after resin impregnation liquid is cured is filled in a gap between the accommodating cavity and the evaporation section, and the condensation section extends out of the charging pile body; the outer surface of the heat-conducting substrate is provided with a heat-conducting material, the heat-conducting material is in contact with a heating part of the heating equipment in a fitting manner, and the heat-conducting material comprises a graphite film, a thermal phase change material or heat-conducting silicone grease; be provided with heat reflection thermal barrier coating on the outer wall of filling electric pile body, implement the reflection to solar radiation and ground radiation.

Optionally, the phase change working medium comprises: distilled water, acetone, methanol or ammonia water; the interior of the heat pipe is a closed cavity in a vacuum state, and capillary filaments are filled in the closed cavity; the condensing section is also provided with a plurality of radiating fins; the heat reflection heat insulation coating comprises talcum powder, kaolin or hollow glass beads.

Optionally, the inside of filling the electric pile body still is provided with the attenuator, the attenuator includes the container, hold in damping fluid in the container and float on a plurality of masses on the damping fluid, the surface of mass forms a plurality of teeth, the container with fill the inner wall fixed connection of electric pile body.

Optionally, still be provided with ultrasonic distance sensor and proximity alarm on filling the electric pile body, ultrasonic distance sensor with proximity alarm all with the main control unit electricity is connected, ultrasonic distance sensor detects the distance of filling between electric pile and the vehicle, main control unit basis the distance control that ultrasonic sensor fed back proximity alarm sends the alarm signal of different grades.

Optionally, the lower part of filling the electric pile body still is provided with level sensor, still be provided with water level alarm on filling the electric pile body, level sensor with water level alarm all with the main control unit electricity is connected, main control unit is according to level sensor's monitoring data confirms whether to trigger the water level alarm reports to the police, and whether the affirmation is controlled fill the electric pile body and carry out the power-off protection.

Optionally, a communication device, a first video acquisition device, a second video acquisition device and a smoke alarm are further arranged on the charging pile body, and the communication device, the first video acquisition device, the second video acquisition device and the smoke alarm are respectively and electrically connected with the main controller; the first video acquisition equipment is used for acquiring a first video monitoring image inside the charging pile body, the second video acquisition equipment is used for acquiring a second video monitoring image outside the charging pile body, the main controller cuts off an input or output power supply of the charging pile according to an abnormal smoke monitoring signal output by the smoke alarm, starts the first video acquisition equipment and the second video acquisition equipment, and sends the abnormal smoke monitoring signal, the first video monitoring image and the second video monitoring image to a remote monitoring server through the communication equipment; the communication device includes: ethernet, GPRS/CDMA, RS232, RS485, infrared transceiver.

Optionally, a positioning circuit is further arranged in the charging pile body, the positioning circuit is electrically connected with the main controller, and the positioning circuit comprises a big dipper GPRS dual-mode positioning chip and/or a GPS positioning module.

Optionally, a power supply inlet wire of the charging pile adopts a flame-retardant cable, and a cable protective tube is arranged on the periphery of the flame-retardant cable; still be provided with the ventilation hole on the alternating-current charging stake body install dustproof filter screen or active carbon filter screen in the ventilation hole.

Optionally, it still is provided with in the electric pile body to fill: the harmonic detection circuit is used for detecting harmonic waves in the power grid and feeding the harmonic waves back to the main controller; the power active filter is used for being started under the control of the main controller to eliminate harmonic waves in a power grid; the harmonic detection circuit and the power active filter are respectively electrically connected with the main controller.

Optionally, the charging pile further comprises a standby power system, and the standby power system comprises an energy storage element and a new energy power generation system; the main controller is also electrically connected with the energy storage element, and the energy storage element is electrically connected with the new energy power generation system; the new energy power generation system comprises one or more of the following: wind power generation equipment, solar photovoltaic power generation equipment, water power generation equipment, biological power generation equipment, tidal power generation equipment and combustible gas power generation equipment.

The technical scheme has the following beneficial technical effects:

the heat conduction layer is formed by injecting resin impregnation liquid into a gap between the accommodating cavity of the heat conduction substrate and the evaporation section of the heat pipe and solidifying the resin impregnation liquid, the heat conduction layer is used as a heat conduction bridge, the heat conduction substrate and the evaporation section of the heat pipe form a continuous heat conduction medium, the heat conduction coefficient of the heat conduction layer is far higher than that of air, the heat conduction layer makes close thermal contact with the heat conduction substrate and the evaporation section of the heat pipe, the heat conduction area is enlarged, and the heat conduction efficiency and the heat exchange performance are obviously improved.

This embodiment is through setting up smoke alarm, a plurality of video acquisition equipment and communication equipment, can detect and fill near or the inside abnormal conditions such as high temperature, smog or flame of electric pile, starts alarming function and automatic cutout fills the charging source of electric pile to and send inside and outside monitoring image with real smog of analysis positioning or the position of firing to remote monitoring server, carry out the accurate positioning to the fault point, further improve the security that fills electric pile.

Due to the fact that the charging pile is provided with the positioning module, the geographical position system of the charging pile is sent to a background monitoring mechanism in real time or at intervals through the positioning module, and the anti-theft safety problem is solved.

This fill electric pile can solve and fill electric pile among the prior art and do not have the stand-by power supply function, can't detect the power failure, falls the electric data that can lose suddenly falling the power failure, increases simultaneously and erases memory, reduces the problem of memory life-span. Should fill electric pile still with energy storage component electric connection, energy storage component and new forms of energy power generation system electric connection can be in the unexpected outage in-process, in time carry out urgent power supply through energy storage battery.

This fill electric pile is through addding harmonic suppression circuit, and it includes harmonic detection unit and electric power active filter to when the harmonic in the electric wire netting surpassed national standard's allowable value, then start electric power active filter and eliminate the harmonic, in order to improve the electric energy quality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a connection between a charging pile and an electric vehicle according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an internal structure of a charging pile according to embodiment 1 of the present invention;

fig. 3 is a schematic diagram of an internal structure of a charging pile according to embodiment 1 of the present invention;

fig. 4 is a schematic diagram of a circuit structure of a charging pile according to embodiment 2 of the present invention.

The reference numbers illustrate:

001-electric vehicle; 002-charging wire; 003-charging pile body; 004-a charging interface body;

100-charging pile;

10-charging pile body; 12-heat reflective thermal barrier coating;

20-a heat generating device;

30 a cooling device; 31-a thermally conductive substrate; 32-a heat pipe; 322-an evaporation section; 324-a condensation section; 326-a thermally conductive cured layer; 33-a thermally conductive material;

40-a damper; 42-a container; 44-damping fluid; 46-a mass; 462-teeth.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Fig. 1 is the utility model discloses an alternating-current charging stake is connected with electric automobile's schematic diagram. As shown in fig. 1, the equipment 001 to be charged is an electric automobile, and the one end of the interface body 004 that charges is connected with charging wire 002, and the interface body 004 that charges is connected with through charging wire 002 and fills electric pile body 003.

Fig. 2 is the utility model discloses embodiment 1 fills electric pile's inner structure schematic diagram one. As shown in fig. 2, embodiment 1 of the present invention provides a charging pile 100 for an electric vehicle, which includes: the charging pile comprises a charging pile body 10, a heating device 20 arranged inside the charging pile body 10, and a cooling device 30 used for cooling the heating device 20; the heat-generating device 20 comprises a main controller, the cooling device 30 comprises a heat-conducting substrate 31 and a heat pipe 32, a containing cavity is arranged inside the heat-conducting substrate 31, the heat pipe 32 comprises an evaporation section 322, a condensation section 324 and a phase-change working medium which circularly flows between the evaporation section 322 and the condensation section 324, the evaporation section 322 is embedded in the containing cavity of the heat-conducting substrate 31, a heat-conducting cured layer 326 formed by curing a resin impregnation liquid is filled in a gap between the containing cavity and the evaporation section 322, and the condensation section 324 extends out of the charging pile body 10; the outer surface of the heat conducting substrate 31 is provided with a heat conducting material 33, the heat conducting material 33 is in contact with a heating part of the heating device 20, and the heat conducting material 33 comprises a graphite film, a thermal phase change material or heat conducting silicone grease; be provided with heat reflection thermal barrier coating 12 on charging pile body 10's the outer wall, implement the reflection to solar radiation and ground radiation.

The heat generating device 20 may include a heat generating device such as a charging module, a power module, or other electronic devices in the charging post body 10, in addition to the main control. The heat conducting curing layer 326 is used for eliminating a gap between the evaporation section 322 of the heat pipe 32 and the accommodating cavity of the heat conducting substrate 31, so that the evaporation section 322 of the heat pipe 32 is in close contact with the accommodating cavity of the heat conducting substrate 31, a solid continuous heat conducting bridge is formed, and the heat conducting efficiency is improved. The heat dissipation graphite film is a good heat conduction material, also called as a heat conduction graphite film, a heat conduction graphite sheet, a graphite heat dissipation sheet and the like, has elasticity, can be cut and stamped into any shape, can be bent for multiple times, is suitable for rapid heat conduction for converting a point heat source into a surface heat source, and has very high heat conduction performance. Thermal phase change materials are substances that change form with temperature and provide latent heat. The process of a phase change material changing from a solid state to a liquid state or vice versa is called a phase change process, and the phase change material absorbs or releases a large amount of latent heat. The heat conductive silicone grease is one of materials used to fill a gap between a main controller of the charging post and a heat sink, which is also called a thermal interface material. The heat dissipation device has the functions of conducting heat dissipated by the main controller to the heat dissipation fins, keeping the temperature of the main controller at a level capable of working stably, preventing the main controller from being damaged due to poor heat dissipation and prolonging the service life. In heat dissipation and conduction applications, even two planes with very clean surfaces will have voids when they contact each other, and the air in these voids is a poor conductor of heat and hinders the conduction of heat to the heat sink. The heat-conducting silicone grease is a material which can fill the gaps and enable heat conduction to be smoother and quicker. The heat-conducting silicone grease is hardly cured, can keep a grease state for a long time at the temperature of-50 ℃ to +230 ℃, and has excellent electrical insulation and heat conductivity.

In the present embodiment, a heat pipe 32 is used to dissipate heat generated by the heat generating components in the charging post. The heat pipe 32 comprises a pipe shell, and a capillary wire and a liquid accommodated in a cavity formed by the pipe shell in a surrounding manner, wherein the cavity is of a closed structure, the capillary wire fills the cavity, the liquid fills part of space in the cavity, and the interior of the cavity is in a vacuum state. The liquid is distilled water, acetone, methanol or ammonia water. The material of the tube shell is copper, stainless steel or aluminum. The working principle of the heat pipe is as follows: when the heat pipe is heated, the cavity of the heat pipe is heated, and because the air pressure in the cavity is extremely low, the vaporization temperature of liquid (such as distilled water) in the cavity is reduced, so that the distilled water in a high-temperature area (namely, the vaporization section 322) at one end of the heat pipe is vaporized, a large amount of heat is absorbed, the vaporized gas is transmitted along the heat pipe groove, and is condensed into distilled water after reaching a low-temperature area (namely, the condensation section 324) at the other end, the heat is released, and the high-efficiency transfer of the heat from the high-temperature area to the low-. The condensed distilled water flows back to the high temperature region along the capillary structure formed by the capillary filaments. And circulating in such a way, and finishing the heat transfer from the high-temperature area to the low-temperature area. Through the inside integrated heat pipe of mainboard of heat conduction base plate 31 or main control unit, utilize the quick samming characteristic of heat pipe, can shift the heat of the 20 high-temperature regions of equipment that generates heat in the electric pile body 10 to outside low-temperature region fast, because the heat pipe has very high coefficient of heat conductivity, generally high to thousands (W/m2.K), so improved the heat conductivility greatly, quick even heat dissipation has been realized, thereby the complete machine temperature rise that will fill electric pile is controlled in reasonable range, the too high problem of local temperature has been avoided.

The inventor of the present application considers that, because a gap exists between the accommodating cavity of the heat-conducting substrate and the evaporation section of the heat pipe, the existence of the gap causes the heat conduction to be interrupted, the heat conductivity of the air in the gap is low, and the heat in the heat-conducting substrate cannot be rapidly transferred to the condensation end of the heat pipe for cooling and dissipation. And, the existence of this installation clearance for the area of contact between the evaporation zone of heat pipe and the heat pipe of heat conduction base plate holds the chamber reduces, thereby has reduced heat conductivility and heat transfer rate. Moreover, due to the existence of the installation gap, the thermal contact between the evaporation section of the heat pipe and the accommodating cavity of the heat-conducting substrate is not tight, and the heat pipe fails to work normally in severe cases. To solve the problem, in the present embodiment, the heat-conducting cured layer 326 is formed by injecting and curing a resin-impregnated liquid into a gap between the receiving cavity of the heat-conducting substrate 31 and the evaporation section of the heat pipe 32, the heat-conducting cured layer 326 serves as a heat-conducting bridge to form a continuous heat-conducting medium between the heat-conducting substrate 31 and the evaporation section of the heat pipe 32, the heat-conducting cured layer 326 has a thermal conductivity much higher than that of air, and the heat-conducting cured layer 326 makes close thermal contact between the heat-conducting substrate 31 and the evaporation section of the heat pipe 32, so that the heat-conducting area is enlarged, and the heat-conducting efficiency and the heat exchange performance are significantly improved. Specifically, in this embodiment, a mature vacuum impregnation liquid injection manner may be adopted, and the resin impregnation liquid is injected into the gap between the accommodating cavity of the heat conducting substrate 31 and the evaporation section 322 of the heat pipe 32 and cured, which is beneficial to filling the impregnation liquid more uniformly and sufficiently into the gap between the accommodating cavity and the outer wall of the evaporation section 322, so that the heat dissipation is more uniform and rapid, and the thermal conductivity is higher. At the time of curing, at least one of a radio frequency heating device, a microwave heating device, a far infrared heating device and an electric heating device can be further adopted to cure the resin impregnation liquid to form a cured layer for heat conduction, which is equivalent to that a reliable, well-contacted and high-heat-conductivity heat conduction bridge is constructed between the heat conduction substrate 31 and the evaporation section 322 of the heat pipe 32. The use of the above-described heating apparatus facilitates faster and better curing.

The inventor of this application considers to fill electric pile and exposes in the solar radiation for a long time, receives the sun exposure, makes easily to fill electric pile inside temperature rise. For solving this problem, this embodiment is provided with heat reflection thermal barrier coating 12 on the outer wall of electric pile body, implements the reflection to solar radiation and ground radiation to can prevent to fill electric pile body and inside electronic equipment to the absorption of sun and surrounding environment's thermal radiation, reduce the temperature of filling electric pile interior electronic equipment. The solar heat reflective thermal insulation coating 12 is a functional coating having a significant reflection effect on near-infrared radiation, and the coating generally coats particles having a reflection function on near-infrared radiation onto a substrate, so as to reflect and scatter the near-infrared radiation in the solar radiation into an external space, and reduce the temperature of the surface and the internal environment of an object under thermal radiation.

Further, the phase change working medium comprises: distilled water, acetone, methanol or ammonia water; the interior of the heat pipe is a closed cavity in a vacuum state, and capillary filaments are filled in the closed cavity; the condensing section is also provided with a plurality of radiating fins; the heat-reflecting heat-insulating coating comprises talcum powder, kaolin or hollow glass beads.

The inventor of this application considers, fills electric pile and receives the strong wind to influence and rock easily, takes place to empty even, when filling electric pile and receive wind power influence inclination to exceed safe inclination threshold value, fills electric pile and will be forced to shut down, and this application range that will restrict and fill electric pile. In order to solve the technical problem, the damper 40 for inhibiting the vibration of the charging pile is added to the charging pile in the embodiment, so that the charging pile can still be in a stable state in a strong wind state, and the normal work is continuously kept, and the application range and the application occasion of the charging pile are enlarged. Specifically, fig. 3 is the utility model discloses embodiment 1's electric pile's internal structure schematic diagram two fills, as shown in fig. 3, fills the inside of electric pile body 10 and still is provided with attenuator 40, and attenuator 40 includes container 42, holds damping liquid 44 in container 42 and floats a plurality of masses 46 on damping liquid 44, and the surface of masses 46 forms a plurality of teeth 462, container 42 and the inner wall fixed connection who fills electric pile body 10. The teeth 462 serve to break the waves formed in the damping fluid 44 due to the vibrations into dispersion in different directions. In windy weather, damping liquid in a damper in the charging pile vibrates and fluctuates in the cavity, a mass body in the damping liquid is acted by the liquid, along with the up-and-down motion of waves, kinetic energy obtained by liquid transmission is converted into energy in other forms such as gravitational potential energy, heat energy and the like, so that the vibration kinetic energy of the enclosure structure tower barrel is consumed, the effects of inhibiting vibration and reducing vibration of the charging pile are achieved, energy carried by the downwind vibration of the charging pile is transmitted to the damping liquid and transmitted to the mass body through the damping liquid, the energy carried by the damping liquid and the mass body in the vertical direction and the motion in the vertical direction are converted, and the energy carried by the vibration is dissipated in the motion process in the vertical direction, and here, the energy carried by the vibration is transferred and dissipated in the orthogonal or nearly vertical direction.

Further, still be provided with ultrasonic wave distance sensor and approach alarm on filling the electric pile body, ultrasonic wave distance sensor all is connected with the main control unit electricity with the approach alarm, and ultrasonic wave distance sensor detects the distance of filling between electric pile and the vehicle, and main control unit sends the alarm signal of different grades according to the distance control approach alarm that ultrasonic wave sensor fed back.

Further, fill the lower part of electric pile body and still be provided with level sensor, still be provided with water level alarm on filling the electric pile body, level sensor and water level alarm all are connected with the main control unit electricity, and whether main control unit confirms to trigger water level alarm according to level sensor's monitoring data and reports to the police to and whether confirm to control and fill the electric pile body and carry out power-off protection.

Furthermore, the charging pile body 10 is also provided with a communication device, a first video acquisition device, a second video acquisition device and a smoke alarm, and the communication device, the first video acquisition device, the second video acquisition device and the smoke alarm are respectively and electrically connected with the main controller; the intelligent charging pile comprises a charging pile body 10, a first video acquisition device, a second video acquisition device, a main controller and a remote monitoring server, wherein the first video acquisition device is used for acquiring a first video monitoring image inside the charging pile body 10, the second video acquisition device is used for acquiring a second video monitoring image outside the charging pile body 10, the main controller cuts off an input or output power supply of the charging pile according to an abnormal smoke monitoring signal output by a smoke alarm, starts the first video acquisition device and the second video acquisition device, and sends the abnormal smoke monitoring signal, the first video monitoring image and the second video monitoring image to the remote monitoring server through a communication device; the communication apparatus includes: ethernet, GPRS/CDMA, RS232, RS485, infrared transceiver. By the aid of the mode, the smoke point generating position or the fault part can be located quickly, and the smoke generation reason can be determined.

Further, still be provided with positioning circuit in the electric pile body 10 that fills, positioning circuit is connected with the main control unit electricity, and this positioning circuit includes big dipper GPRS bimodulus location chip and/or GPS orientation module. The positioning circuit sends the geographical position system of the positioning circuit to a background monitoring mechanism in real time or at intervals so as to solve the anti-theft safety problem.

Furthermore, a flame-retardant cable is adopted for the incoming line of a power supply of the charging pile, and a cable protective pipe is arranged on the periphery of the flame-retardant cable; still be provided with the ventilation hole on the alternating-current charging stake body, install dustproof filter screen or active carbon filter screen on the ventilation hole. The power connection of the multiple alternating current charging piles should consider the three-phase balance of the power supply. The installation mode such as a floor type or a wall-mounted type can be adopted. The installation foundation of the floor type charging pile is higher than the ground by 0.2m and above, and an anti-collision fence can be installed if necessary. The protective ground terminal should be reliably grounded. Outdoor charging pile takes necessary rainproof and dustproof measures.

Further, still be provided with in the electric pile body 10: the harmonic detection circuit is used for detecting harmonic waves in the power grid and feeding the harmonic waves back to the main controller; the power active filter is used for starting under the control of the main controller to eliminate harmonic waves in a power grid; the harmonic detection circuit and the power active filter are respectively and electrically connected with the main controller. The harmonic current injected by the charging station into the power grid and the sinusoidal distortion rate causing the voltage of the public connection point meet the relevant regulations of the current national standard of harmonic wave of electric energy quality public power grid GB/T14549. When the harmonic wave of the access public power grid and the sine distortion rate of the voltage of the public connection point need to be reduced or controlled, measures such as installing a filter and the like are taken for improvement. The electric automobile fills electric pile is a non-linear equipment, and the during operation can produce very high harmonic current, reduces electric power system's electric energy quality, seriously influences other equipment safe operation on the public connection point. Therefore, in order to eliminate these harmonics, the present embodiment mounts an APF (Active Power Filter). The working principle of the compensation device is that voltage and current of a compensation object are detected, an instruction current signal of compensation current is calculated through an instruction current arithmetic unit, an instruction current signal is installed on a current tracking control part to control the compensation current, the compensation current is offset with harmonic waves and reactive current to be compensated in alternating-current side charging current, and expected power grid current is finally obtained. The main controller is respectively and electrically connected with the electric automobile charging detection unit, the harmonic detection unit and the power active filter. When an electric automobile is charged, the electric automobile charging detection unit sends a detected signal to the main controller, the main controller starts the harmonic detection unit to detect harmonic waves in the power grid, and when the harmonic waves exceed an allowable value of a national standard, the national standard number is GB _ T _14549 + 1993, the standard name is electric energy quality public power grid harmonic waves, the electric active filter is started to eliminate the harmonic waves, and the power grid harmonic waves are displayed through the display unit.

Furthermore, the charging pile further comprises a standby power supply system, wherein the standby power supply system comprises an energy storage element and a new energy power generation system; the main controller of the charging pile is also electrically connected with the energy storage element, and the energy storage element is electrically connected with the new energy power generation system; the new energy power generation system comprises one or more of the following components: wind power generation equipment, solar photovoltaic power generation equipment, water power generation equipment, biological power generation equipment, tidal power generation equipment and combustible gas power generation equipment. By means of the method, the problem that in the prior art, a charging pile control board does not have a standby power supply function, power failure cannot be detected, charging data can be lost when power failure occurs suddenly, erasing and writing of a memory are increased, and the service life of the memory is shortened is solved.

Example 2

Fig. 4 is a schematic circuit diagram of an ac charging pile according to a second embodiment of the present invention. Referring to fig. 4, the utility model discloses a stake of alternating-current charging of second embodiment is used for providing safe, reliable alternating current power supply for the on-vehicle machine that charges of electric automobile. As an example, the power supply of the alternating current charging pile adopts 220V alternating current voltage, and the rated current is less than or equal to 32A. This alternating-current charging stake includes: the emergency power supply comprises a charging protection circuit group, a main power supply system, a standby power supply system, a main controller, a cooling system, a man-machine interaction system, a communication module, a harmonic suppression circuit, a connection abnormality detection circuit and an emergency stop switch. The charging protection circuit group, the main power supply system, the standby power supply system, the cooling system, the human-computer interaction module, the communication module, the harmonic suppression circuit, the connection abnormality detection circuit and the emergency stop switch are all electrically connected with the main controller.

(1) Human-computer interaction system

The human-computer interaction system is in communication connection with the central processing module and comprises: and the touch operation and display module is electrically connected with the main controller and is used for displaying relevant information under each state in real time, including displaying the indication of a standby state, a charging state or a full-charging state, displaying charging parameters including output voltage, output current and electric energy charging information and temperature information in the charging pile body, and displaying corresponding warning information when a fault occurs. The touch operation and display module is further used for providing an interface for setting the charging amount, the payment password and the system parameters, and simultaneously performing start/stop control operation on the alternating current charging pile.

And the identity recognition module is used for recognizing the identity information of the vehicle owner. It includes at least one of the following: charging an information card reader; a fingerprint identifier; a face recognition module; two-dimensional code scanning identification module.

In one embodiment, the two-dimensional code scanning identification module can be implemented by a bar code scanner. The bar code scanner scans a two-dimensional code generated by a mobile phone of a user to acquire charging reservation information. The charging reservation information includes information such as a charging mode (ordinary charging, quick charging, quantitative charging, timing charging, SOC charging (percentage of remaining charge)), charging time, and a payment mode (online payment or on-site card payment) reserved by the user through the mobile phone.

In one embodiment, the charging information card reader may be implemented by an RFID card reader. The man-machine interaction system comprises a man-machine interaction operation panel, and the convenience of operation can be improved. The man-machine interaction operation panel is provided with: the device comprises a slot, a card swiping board, a touch screen, a start switch, a stop switch and a pause switch. The user can press the starting switch, the stopping switch and the pause switch on the panel to carry out the operations of starting charging, stopping charging and pausing charging on the charging interface or the charging gun. The coin slot can let the user deliver the coin and purchase the electric quantity, also can handle the card, utilizes the magnetic card to pay required electric quantity, and the touch-sensitive screen can supply the user to select charging mode, charging time and charging speed etc. after the selection of user to the touch-sensitive screen is accomplished, presses starting switch, can realize the operation of charging to new energy automobile.

In one embodiment, the man-machine interaction system is connected with the main controller through an RS232 interface or an RS485 interface. The IC card reader is connected with the main controller through an RS232 interface or an RS485 interface. In one embodiment, the human-computer interaction system comprises a voice prompt loudspeaker which prompts a user to perform various operations on the touch screen through voice, wherein the operations comprise identity confirmation, charging mode selection, charging starting or stopping and the like. The face recognition module comprises a camera and a background server, wherein the camera is used for collecting face information of a user, a plurality of pieces of face information of the user are stored in the background server, the face information collected by the camera is matched with the face information stored in the background server, and a matching result is fed back to the main controller.

(2) Charging protection circuit group

A charge protection circuit group, comprising: the device comprises an overload protection circuit, a short-circuit protection circuit, a leakage protection circuit, an alternating current input overvoltage protection circuit, an alternating current input overcurrent protection circuit, an alternating current output overvoltage protection circuit, an alternating current output overcurrent protection circuit, an over-temperature protection circuit, a lightning protection circuit and a tilt angle sensor. The inclination angle sensor is designed inside the alternating-current charging pile, when the charging pile is inclined at an angle due to collision, the main controller senses a signal fed back by the inclination angle through the inclination angle sensor and automatically cuts off a main power supply loop. For example: when detecting that alternating-current charging stake receives the striking or when slope 10 and above, alternating-current charging stake auto-power-off avoids causing the personal safety problem because of the cabinet body is electrified.

(3) Main power supply system

The main power supply system includes: the high-voltage distribution frame, the transformer and the three-phase charging loop are electrically connected in sequence, and the reactive power compensation device is electrically connected with a connecting wire between the transformer and the three-phase charging loop. The input of high voltage distribution cabinet is connected with the high voltage electric network electricity, and high voltage distribution cabinet's output is connected with the high-pressure side of transformer, and reactive power compensation arrangement sets up the low-voltage side at the transformer, and three-phase charging circuit is connected with main control unit electricity. This fill electric pile and add reactive power compensator, the new energy automobile charging system who has solved prior art lacks reactive power compensation mechanism, and the voltage loss who causes by reactive power transmission in joining in marriage the net is great, the relatively poor problem of electric wire netting quality.

The limit value of the voltage fluctuation and the flicker generated by the alternating current charging pile at the public connection point of the power grid is in accordance with the relevant regulation of the current national standard GB/T12326 of power quality voltage fluctuation and flicker. In this embodiment, when the fluctuation load of the charging pile causes the grid voltage fluctuation and flicker, technical measures such as a dynamic reactive power compensation device or a dynamic voltage regulation device are adopted for improvement, and for a charging station with a high-power charger, a power grid with a large short-circuit capacity can be used for supplying power.

The reactive power compensation device should meet the following requirements: the reactive power compensation device is preferably arranged on the low-voltage side of the transformer, and the compensation capacity is preferably determined according to the power factor of the high-voltage side of the transformer at the maximum load, which is not lower than 0.95. When the natural power factor of the electric equipment meets the requirement that the power factor of the high-voltage side of the transformer is not lower than 0.95, a low-voltage reactive power compensation device is not additionally arranged.

(4) Standby power supply system

And the standby power supply system comprises an energy storage element and a new energy power generation system. The main controller of the charging pile is also electrically connected with the energy storage element, and the energy storage element is electrically connected with the new energy power generation system. The new energy power generation system comprises one or more of the following components: wind power generation equipment, solar photovoltaic power generation equipment, water power generation equipment, biological power generation equipment, tidal power generation equipment and combustible gas power generation equipment.

In an exemplary embodiment, a solar panel and a simple wind power generator are arranged on the top of the body of the alternating-current charging pile or on the ground area nearby, a storage battery is arranged inside the alternating-current charging pile body, the solar panel converts solar energy into electric energy to be stored in the storage battery, and the simple wind power generator converts wind energy into electric energy to be stored in the storage battery. The solar panel is provided with a solar tracker for tracking sunlight. Furthermore, an electric heating element (such as an electric heating pipe) and a humidity sensor are additionally arranged inside the alternating current main electric pile and are electrically connected with the storage battery, and under the control of the main controller, the internal environment of the alternating current charging pile is heated and dehumidified according to the humidity value fed back by the humidity sensor. Furthermore, a wind speed and direction sensor is also arranged on the alternating current charging pile and used for measuring the current wind speed and direction and feeding the current wind speed and direction back to the main controller, when the main controller determines that the current wind speed and direction meet wind power generation conditions (if the current wind speed is too low and is lower than cut-in wind speed, the wind power generator is not started, and if the current wind speed is too high and is higher than cut-out wind speed, safety risk exists in wind power generation at the moment, the wind power generator is closed, the wind power generator is started to carry out power generation operation, when the main controller determines that the current wind speed and direction do not meet the wind power generation conditions, the wind power generator is closed, or the wind power generator is driven to carry out yaw wind alignment, and the wind power generation operation is carried out after the wind direction is over against so as to improve. Further, when the wind power generation equipment or the solar power generation equipment is arranged on the alternating-current charging pile, the wind power generation equipment or the solar power generation equipment is detachably connected, for example, is connected and fixed to the alternating-current charging pile in a vacuum chuck mode, so that the maintenance is facilitated. Further, the storage battery is further electrically connected with an inverter, and the output end of the inverter is electrically connected with a main controller of the charging pile through an output cable. In an alternative embodiment, the wind turbine may be a helical vertical axis wind turbine.

(5) Cooling system

Fill and be fixed with temperature sensor on main control unit and the power module in the electric pile or the module that charges, temperature sensor connects main control unit's signal input end through the signal line, fill the other and power module or the other radiator fan that is fixed with of main control unit in the electric pile, main control unit's signal output part connects radiator fan's drive unit. The heat dissipation unit comprises a heat dissipation fan (a turbofan can be adopted), a control switch for controlling the start, the stop and the rotating speed of the heat dissipation fan is arranged on the heat dissipation fan, and the control switch is connected with the control output end of the main controller.

(6) Connection abnormality detection circuit and emergency stop switch

And the emergency stop switch is used for emergently cutting off the output power supply in the charging process. And the main controller is also used for carrying out emergency shutdown according to the remote control emergency shutdown signal. A connection abnormality detection circuit for detecting a charging voltage in a charging process; and the main controller is used for automatically cutting off the output power supply immediately and stopping charging when the difference value between the detected charging voltage and the normal charging voltage exceeds a preset threshold value and the charging interface is determined to be abnormal.

(7) Communication module

The communication module comprises one or more of Ethernet, GPRS/CDMA, RS232, RS485 and infrared transceivers. The infrared transceiver includes an infrared transmitter and an infrared receiver. In other embodiments, the communication module is a wireless communication module, and the wireless communication module is one or more of a bluetooth module, a 4G TD-LTE/GPRS/CDMA wireless public network, a 230MHz wireless private network, and an optical fiber.

(8) Main controller

The main controller is used for controlling the work of each part. For example, the main controller is used for receiving and processing operation data in the charging process of the charging pile. The main controller is used for controlling whether an output power supply is cut off or not, controlling whether wind power generation equipment and/or photovoltaic power generation equipment are started or not, controlling whether an electric heating dehumidification device inside the alternating-current charging pile is started or closed or not, controlling whether a corresponding level of proximity degree alarm signals are sent to surrounding vehicles or not, judging whether a charging interface is abnormal or not, and controlling the power supply module to disconnect a circuit after receiving a fire or smoke alarm signal or an emergency stop instruction. The main controller can adopt a single chip microcomputer controller or a microprocessor.

Further, in other embodiments, the following technical means may be adopted to improve other power quality of the ac charging post: the allowable deviation of the power supply voltage of the power supply and distribution system of the charging pile meets the following requirements: the voltage deviation of a three-phase power supply of 10kV (20kV) and below is +/-7% of the nominal voltage. The design of the charging pile should adopt measures of reducing the deviation of the power supply voltage, such as selecting a reasonable transformer transformation ratio and a reasonable voltage tap, reducing the system impedance, compensating the reactive power, adjusting the three-phase load balance and the like.

Further, still be provided with the cell-phone end of charging on the alternating-current charging stake, its fixedly connected with contains the cell-phone charging wire of three kinds of interfaces of Micro USB interface, USBType C interface and Lightning interface.

Furthermore, the alternating current charging pile also comprises an alternating current energy meter which is used as a metering device of the alternating current charging pile. The charging metering device of the alternating-current charging pile adopts a static alternating-current multi-rate active electric energy meter (hereinafter referred to as an alternating-current electric energy meter), the alternating-current electric energy meter adopts a direct access type, and the electrical and technical parameters of the alternating-current electric energy meter accord with the following regulations: the reference voltage (Un) should be 220V; the basic current (Ib) should be 10A; the maximum current (Imax) should be greater than or equal to 4 times the base current; the reference frequency should be 50 Hz; the accuracy rating should be on the order of 2.0. When alternating-current charging stake possesses a plurality of interfaces that charge simultaneously, every interface should be equipped with alternating-current energy meter alone. Furthermore, a nanometer waterproof film is plated on the surface of each charging interface body, so that the charging interfaces have waterproofness and are not easy to rust. The alternating current electric energy meter is suitable to be installed inside the alternating current charging pile and located between the alternating current output end and the vehicle-mounted charger, and other devices irrelevant to measurement are not required to be connected between the electric energy meter and the vehicle-mounted charger. The alternating-current charging pile can collect data of an alternating-current electric energy meter, calculate charging electric quantity, and display information such as charging time, charging electric quantity and charging expense. The alternating-current charging pile can display the charging electric quantity of this time and can clear the item. The alternating-current charging pile can record at least 100 charging behaviors, and the record content comprises a charging starting moment, a starting moment electric quantity value, an ending moment electric quantity value and a charging electric quantity.

Further, still include alternating-current charging stake's power supply and distribution system: the medium-low voltage distribution system adopts a single bus or a single bus sectional wiring, and the low-voltage grounding system is preferably a TN-S system. The low-voltage inlet and outlet switch and the section switch adopt circuit breakers. A mechanical locking and electrical interlocking device should be arranged between the low-voltage incoming line circuit breaker and the low-voltage section circuit breaker from different power supplies to prevent the parallel operation of the different power supplies. The low-voltage incoming circuit breaker has the functions of short circuit instant, short circuit short delay, short circuit long delay and grounding protection, and is not suitable for being provided with a voltage-loss tripping device or a low-voltage tripping device due to the arrangement of the shunt tripping device. The off-board charger, the monitoring device and important electric equipment are preferably supplied with power in a radial mode.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A safety protection type charging pile (100) for electric vehicles, comprising: the charging pile comprises a charging pile body (10), a heating device (20) arranged inside the charging pile body (10), and a cooling device (30) used for cooling the heating device (20); the heating device (20) comprises a main controller, the cooling device (30) comprises a heat-conducting substrate (31) and a heat pipe (32), a containing cavity is arranged inside the heat-conducting substrate (31), the heat pipe (32) comprises an evaporation section (322), a condensation section (324) and a phase-change working medium which circularly flows between the evaporation section (322) and the condensation section (324), the evaporation section (322) is embedded into the containing cavity of the heat-conducting substrate (31), a heat-conducting cured layer (326) formed after a resin impregnation liquid is cured is filled in a gap between the containing cavity and the evaporation section (322), and the condensation section (324) extends out of the charging pile body (10); the outer surface of the heat-conducting substrate (31) is provided with a heat-conducting material (33), the heat-conducting material (33) is in contact with a heating part of the heating equipment (20), and the heat-conducting material (33) comprises a graphite film, a thermal phase-change material or heat-conducting silicone grease; be provided with heat reflection thermal barrier coating (12) on the outer wall of filling electric pile body (10), implement the reflection to solar radiation and ground radiation.

2. The safety protection type charging pile (100) for electric vehicles according to claim 1, wherein the interior of the heat pipe (32) is a closed cavity in a vacuum state, and the closed cavity is filled with capillary filaments; the condensing section (324) is also provided with a plurality of radiating fins.

3. The safety protection type charging pile (100) for electric vehicles according to claim 1, wherein a damper (40) is further disposed inside the charging pile body (10), the damper comprises a container (42), a damping fluid (44) contained in the container (42) and a plurality of mass bodies (46) floating on the damping fluid (44), a plurality of teeth (462) are formed on the outer surface of the mass bodies (46), and the container (42) is fixedly connected with the inner wall of the charging pile body (10).

4. The charging pile (100) for the electric automobile is characterized in that an ultrasonic distance sensor and an approach alarm are further arranged on the charging pile body (10), the ultrasonic distance sensor and the approach alarm are both electrically connected with the main controller, the ultrasonic distance sensor detects the distance between the charging pile and a vehicle, and the main controller controls the approach alarm to send alarm signals of different levels according to the distance fed back by the ultrasonic distance sensor.

5. The safety protection type charging pile (100) for the electric automobile according to claim 1, wherein a water level sensor is further arranged on the lower portion of the charging pile body (10), a water level alarm is further arranged on the charging pile body (10), the water level sensor and the water level alarm are both electrically connected with the main controller, and the main controller determines whether to trigger the water level alarm to give an alarm according to monitoring data of the water level sensor and determines whether to control the charging pile body (10) to perform power-off protection.

6. The safety protection type charging pile (100) for the electric automobile according to claim 1, wherein a communication device, a first video acquisition device, a second video acquisition device and a smoke alarm are further arranged on the charging pile body (10), and the communication device, the first video acquisition device, the second video acquisition device and the smoke alarm are respectively and electrically connected with the main controller; the first video acquisition equipment is used for acquiring a first video monitoring image inside the charging pile body (10), the second video acquisition equipment is used for acquiring a second video monitoring image outside the charging pile body (10), the main controller cuts off an input or output power supply of the charging pile according to an abnormal smoke monitoring signal output by the smoke alarm, starts the first video acquisition equipment and the second video acquisition equipment, and sends the abnormal smoke monitoring signal, the first video monitoring image and the second video monitoring image to a remote monitoring server through the communication equipment; the communication device includes: ethernet, GPRS/CDMA, RS232, RS485, infrared transceiver.

7. The safety protection type charging pile (100) for the electric automobile according to claim 1, wherein a positioning circuit is further arranged in the charging pile body (10), the positioning circuit is electrically connected with the main controller, and the positioning circuit comprises a Beidou GPRS dual-mode positioning chip and/or a GPS positioning module.

8. The safety protection type charging pile (100) for the electric automobile according to claim 1, wherein a power supply inlet wire of the charging pile adopts a flame-retardant cable, and a cable protective tube is arranged on the periphery of the flame-retardant cable; fill and still be provided with the ventilation hole on electric pile body (10) install dustproof filter screen or active carbon filter screen in the ventilation hole.

9. The safety protection type charging pile (100) for electric vehicles according to claim 1, characterized in that the charging pile body (10) is further provided with: the harmonic detection circuit is used for detecting harmonic waves in the power grid and feeding the harmonic waves back to the main controller; the power active filter is used for being started under the control of the main controller to eliminate harmonic waves in a power grid; the harmonic detection circuit and the power active filter are respectively electrically connected with the main controller.

10. The safety protection type charging pile (100) for electric vehicles according to claim 1, further comprising a backup power system, wherein the backup power system comprises an energy storage element and a new energy power generation system; the main controller is also electrically connected with the energy storage element, and the energy storage element is electrically connected with the new energy power generation system; the new energy power generation system comprises one or more of the following: wind power generation equipment, solar photovoltaic power generation equipment, water power generation equipment, biological power generation equipment, tidal power generation equipment and combustible gas power generation equipment.

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