Modularized charging pile convenient to maintain

Abstract

A modular charging pile convenient to maintain disclosed by the present invention comprises a charging pile, an electric box and a plurality of charging modules embedded in the electric box, one side of each charging module is provided with a rectification electric plate used for being electrically connected with an external power supply, and the rectification electric plates are fixedly installed on one side of the interior of the electric box. And an inert gas tank for inert gas is fixedly mounted on one side of the rectifying electric plate. During normal work, the electromagnet generates a magnetic field to enable the magnetorheological fluid to keep certain viscosity, the stability of the conducting strip and the piston plate is ensured, and a current path is maintained; by designing an electromagnet, a Venturi tube, a conducting strip and other devices, when the charging module breaks down and the current is sharply increased, a metal diaphragm of the conducting strip is fused, the electromagnet loses excitation, a first spring piece pushes a piston plate to extrude magnetorheological fluid to wrap a clamping groove to cut off electric connection, meanwhile, deionized water is treated to loosen a buckle, fault expansion is prevented, and the system safety is improved; and the damage to the charging module and other equipment caused by short circuit is reduced.

Description

Technical Field

[0001] The present invention relates to the field of charging pile equipment, and in particular to a modular charging pile that is convenient for maintenance. Background Art

[0002] The charging module is the core component of the charging pile, like the "heart" of the charging pile. It is the key equipment that converts the AC power of the power grid into the DC power required for charging electric vehicles. As a new type of charging equipment, the modular charging pile facilitates the maintenance and maintenance of the charging module, thereby providing efficient charging services for electric vehicles. Through modular design, the charging module in the charging pile can be easily maintained and managed. When repairs or replacement of parts are required, only the corresponding charging module needs to be replaced, which greatly simplifies the maintenance process and reduces maintenance costs.

[0003] When the charging module converts the AC power of the power grid into the DC power required for charging, the rectifier components or variable resistor components in the charging module will generate a certain amount of heat, which will affect their service life. Long-term use will easily lead to performance degradation and failure. When the components in the charging module are damaged and a short circuit occurs, the resistance at the short-circuit point becomes smaller instantly, which causes the current to increase sharply instantly, thereby forming an instantaneous current shock and causing fluctuations in the voltage of the upper power supply, affecting the normal operation of other equipment on the same power supply line.

[0004] To this end, a modular charging pile that is easy to maintain is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a modular charging pile that is easy to maintain, so as to solve the problem raised in the above background technology that when the components in the charging module are damaged and a short circuit occurs, the resistance of the short-circuit point becomes smaller instantly, which in turn causes the current to increase sharply instantly, thereby forming an instantaneous current shock, and causing fluctuations in the voltage of the upper power supply, affecting the normal operation of other equipment on the same power supply line.

[0006] To achieve the above object, the present invention provides the following technical solutions: A modular charging pile convenient for maintenance, comprising a charging pile, an electric box and a plurality of charging modules embedded in the electric box, one side of each charging module is provided with a rectifier plate for electrically connecting to an external power source, and each rectifier plate is fixedly installed on one side of the inner side of the electric box, one side of each rectifier plate is fixedly installed with an inert gas tank of inert gas, a plurality of cable tubes fixedly installed on the rectifier plate are provided below the inert gas tank, and each of the plurality of cable tubes is electrically connected to the rectifier plate; Electromagnets are fixedly installed around the interior of the plurality of cable tubes, a Venturi tube is embedded in the cable tube, and the electromagnet is arranged around the middle outer side of the Venturi tube, a spring component 1 is embedded and fixedly installed on one side of the interior of the Venturi tube, and a piston plate that fits the inner wall of the Venturi tube is fixedly installed on one side of the spring component 1, a conductive sheet is movably installed on the other side of the Venturi tube, and the outer ring of the conductive sheet is a metal diaphragm, a magnetorheological fluid is arranged in the Venturi tube, and the magnetorheological fluid is located between the piston plate and the conductive sheet; A flow guide pipe is provided between the inert gas tank and the cable pipe, and the flow guide pipe is fixedly installed on the rectifier plate and is through-connected with multiple venturi tubes, a clamp is fixedly installed on one side of the flow guide pipe, and slide grooves are provided on both sides of the clamp, and buckles for clamping the charging module are movably installed in the slide grooves, a bellows located on one side of the buckle for sliding is installed in the slide groove, and the bellows and the flow guide pipe are through-connected, and two spring components are installed on both sides of the inside of the clamp, and the two spring components are located on the other side of the buckle.

[0007] In the above scheme, preferably: the other side of the rectifier board is electrically connected to an air switch, and both sides of the charging module are provided with limit bars to center it, and the limit bars are fixedly connected to the electrical box.

[0008] In the above scheme, preferably: a cabinet door is movably installed at one end of the charging pile, and the cabinet door is provided with a display module that provides the user with an intuitive operation interface and charging information display, and louvers are provided on both sides of the charging pile, and the louvers are fixedly installed on both sides of the electric box.

[0009] In the above scheme, preferably: a mounting plate for equipment installation is fixedly installed inside the charging pile, and the mounting plate is arranged on one side of the electrical box, and a power distribution metering module and a communication module are fixedly installed on the top of the mounting plate.

[0010] In the above scheme, preferably: a power supply cable for providing power is provided inside the charging pile, and the power supply cable passes through the mounting board and is electrically connected to the rectifier board, and charging guns are provided on both sides of the charging pile, and the charging guns are electrically connected to the charging module.

[0011] In the above scheme, preferably: a blocking lock is provided on the other side of the charging module, and the blocking lock is located on the electrical box and is movably connected, and the blocking lock is electrically connected to the power distribution and metering module.

[0012] In the above scheme, preferably: an output interface is provided on the other side of the charging module, and the output interface is electrically connected to the charging gun, a data interface is provided on the other side of the charging module, and the data interface is telecommunication-connected to the power distribution and metering module and the communication module through a data cable, and an electrical connector is provided on one side of the charging module, and the electrical connectors are electrically connected to the conductive sheet.

[0013] In the above scheme, preferably: a handle for taking and placing is fixedly installed on the other side of the charging module, and card slots are provided at both ends of one side of the charging module, and the card slots and the buckles are arranged in an interlocking connection.

[0014] In the above scheme, preferably: deionized water is arranged in the flow guide pipe, and the deionized water is arranged inside one side of the venturi tube through the flow guide pipe.

[0015] The present invention provides a modular charging pile that is easy to maintain and has the following technical points and beneficial effects: 1. The present invention designs devices such as electromagnets, venturi tubes and conductive sheets. When working normally, the electromagnet generates a magnetic field to keep the magnetorheological fluid at a certain viscosity, ensure the stability of the conductive sheet and the piston plate, and maintain the current path; when the fault current of the charging module increases sharply, the metal diaphragm of the conductive sheet melts, the electromagnet loses magnetism, and the spring member pushes the piston plate to squeeze the magnetorheological fluid to cover the card slot to cut off the electrical connection. At the same time, deionized water is processed to loosen the buckle to prevent the fault from expanding, thereby improving the safety of the system and reducing the damage to the charging module and other equipment caused by the short circuit.

[0016] 2. The present invention designs devices such as a guide tube, a piston plate and a buckle. During installation, the electrical connector is inserted to push the conductive sheet so that the piston plate squeezes the deionized water, and the deionized water pushes the bellows so that the buckle clamps the electrical connector to achieve a stable installation. During disassembly, the air switch is turned off to activate related components, and spring members one and two work together to reduce the pressure of the bellows to release the buckle, and at the same time the lock is opened to facilitate the removal of the charging module. The buckle can prevent the charging module from being removed when the power is on, and the charging module can be easily removed and used when the power is off, thereby improving the maintainability of the charging pile and reducing maintenance costs and time.

[0017] 3. The present invention designs devices such as cable tubes, inert gas tanks and conductive sheets. When the current path between the conductive sheet and the cable tube is disconnected, the current of the rectifier plate increases, and the electric control valve operates to open the gas injection hole on the inert gas tank, releasing the inert gas to fill the battery box, thereby cooling the charging module and preventing internal components from overheating and burning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2It is a schematic diagram of the internal structure of the charging pile in the present invention.

[0020] Figure 3 It is a schematic diagram of the partial structure of the electric box in the present invention.

[0021] Figure 4 It is a schematic diagram of the connection structure between the louver plate and the electrical box in the present invention.

[0022] Figure 5 It is a schematic diagram of the internal structure of the electric box in the present invention.

[0023] Figure 6 It is a schematic diagram of the local structure of the rectifier plate in the present invention.

[0024] Figure 7 It is a schematic cross-sectional view of the internal structure of the cable tube in the present invention.

[0025] Figure 8 It is a schematic diagram of the split connection structure of the clamping plate and the charging module in the present invention.

[0026] Fig. 9 The figure is a schematic diagram showing the internal structure of the cable tube in the present invention.

[0027] Fig.10 It is a schematic plan view of the internal structure of the splint in the present invention.

[0028] Fig.11 For the present invention Figure 7 A schematic diagram of the enlarged local structure at point A in the middle.

[0029] In the figure: 1. Charging pile; 2. Cabinet door; 3. Shutter; 4. Display module; 5. Charging gun; 501. Power supply cable; 6. Mounting carrier; 7. Power distribution and metering module; 8. Communication module; 9. Electric box; 901. Rectifier board; 902. Air switch; 903. Inert gas tank; 904. Limit strip; 10. Lock; 11. Charging module; 1101. Output interface; 1102. Handle; 1103. Data interface; 1104. Card slot; 1105. Connector; 12. Cable tube; 1201. Venturi tube; 1202. Spring component 1; 1203. Piston plate; 1204. Conductive sheet; 1205. Electromagnet; 13. Clamp; 1301. Guide tube; 1302. Buckle; 1303. Slide; 1304. Bellows; 1305. Spring component 2. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 11 The present invention provides a technical solution for a modular charging pile that is convenient for maintenance: A modular charging pile convenient for maintenance, comprising a charging pile 1, an electric box 9 and a plurality of charging modules 11 embedded in the electric box 9, one side of each charging module 11 is provided with a rectifier plate 901 for electrically connecting to an external power source, and each rectifier plate 901 is fixedly installed on one side of the inner part of the electric box 9, an inert gas tank 903 of inert gas is fixedly installed on one side of the rectifier plate 901, and a plurality of cable tubes 12 fixedly installed on the rectifier plate 901 are provided below the inert gas tank 903, and each of the plurality of cable tubes 12 is electrically connected to the rectifier plate 901; As an embodiment of the present invention, Figures 3 to 7 As shown, the other side of the rectifier board 901 is electrically connected to an air switch 902, and both sides of the charging module 11 are provided with limit bars 904 to center it, and the limit bars 904 are fixedly connected to the electric box 9; During operation, when the charging module 11 is inserted into the electrical box 9, the limiting strip 904 allows the charging module 11 to accurately slide into the electrical box 9 along a predetermined track, and then the power connector 1105 is inserted into the venturi tube 1201 and fits with the conductive sheet 1204 to form a current path. When the external power supply is connected, the current is transmitted to the rectifier board 901 through the power supply cable 501, and is transported to the charging module 11 through the cable tube 12 for rectification and power conversion. The air switch 902 ensures that the current is transmitted on the rectifier board 901 under normal working conditions. If a fault occurs inside the charging module 11, such as damage to an electronic component causing a short circuit or overload, the air switch 902 quickly cuts off the power supply, thereby disconnecting the charging module 11 from the rectifier board 901 through the cable tube 12.

[0032] As an embodiment of the present invention, Figures 4 to 11As shown, the interiors of the plurality of cable tubes 12 are all surrounded and fixedly installed with electromagnets 1205, a venturi tube 1201 is embedded and installed in the cable tube 12, and the electromagnet 1205 is arranged around the middle outer side of the venturi tube 1201, a spring member 1202 is embedded and fixedly installed on one side of the interior of the venturi tube 1201, and a piston plate 1203 that fits the inner wall of the venturi tube 1201 is fixedly installed on one side of the spring member 1202, and a conductive sheet 1204 is embedded and movably installed on the other side of the venturi tube 1201, and the outer ring of the conductive sheet 1204 is a metal diaphragm arrangement, a magnetorheological fluid is arranged in the venturi tube 1201, and the magnetorheological fluid is located between the piston plate 1203 and the conductive sheet 1204, and a flow guide tube 1301 is arranged between the inert gas tank 903 and the cable tube 12; During operation, when the electrical connector 1105 is inserted into the other side of the venturi tube 1201, the electrical connector 1105 squeezes the conductive sheet 1204, and then the magnetorheological fluid pushes the piston plate 1203 to slide to one side in the venturi tube 1201 and compresses the spring member 1202. At this time, the piston plate 1203 squeezes the deionized water from the venturi tube 1201 into the guide tube 1301. Due to the inner wall of the other side of the venturi tube 1201 and the metal on the conductive sheet 1204, the piston plate 1203 squeezes the deionized water from the venturi tube 1201 into the guide tube 1301. It is a diaphragm-fitted electrical connection setting. When the current flows through the cable tube 12 and passes through the electrical connector 1105 that is fitted with the conductive sheet 1204 on the other side of the Venturi tube 1201, the electromagnet 1205 inside it generates magnetic force to change the viscosity of the magnetorheological fluid, thereby hindering the movement of the conductive sheet 1204 and the piston plate 1203 in the Venturi tube 1201 and keeping them stationary. At the same time, the deionized water passes through the bellows 1304 in the guide tube 1301, so that the buckle 1302 is engaged and clamped with the electrical connector 1105; When a fault occurs inside the charging module 11, causing the resistance in the circuit to decrease instantaneously, the current increases sharply in a short period of time while the voltage remains unchanged. At this time, the metal diaphragm on the conductive sheet 1204 will melt due to excessive heat generated, thereby disconnecting the current path between it and the cable tube 12. At this time, the electromagnet 1205 loses its magnetism, making it impossible for the electromagnet 1205 to maintain the magnetized state of the magnetorheological fluid. At the same time, the spring member 1202 pushes the piston plate 1203 to slide toward the inside of the venturi tube 1201 under elastic potential energy, and quickly squeezes the magnetorheological fluid to the other side of the venturi tube 1201, so that the magnetorheological fluid passes through the conductive sheet 1204 of the melted metal diaphragm to the card slot 1104. The electric circuit 901 is covered with a cover, thereby cutting off the electrical connection between the charging module 11 and the rectifier plate 901, and at the same time, the piston plate 1203 draws deionized water from the guide tube 1301 into the venturi tube 1201, thereby canceling the engagement and clamping of the buckle 1302 with the docking head 1105. Secondly, when the conductive sheet 1204 is disconnected from the current path of the cable tube 12 through the venturi tube 1201, the current of the rectifier plate 901 increases. At this time, the electric control valve on the inert gas tank 903 operates to open it when it detects that the current increases, thereby causing the air switch 902 to release the stored inert gas, and filling the electric box 9 with the inert gas to cool down the charging module 11 and prevent the components inside it from overheating and burning.

[0033] As an embodiment of the present invention, Figures 5 to 10 As shown, the guide tube 1301 is fixedly installed on the rectifier plate 901 and is connected with multiple Venturi tubes 1201. A clamping plate 13 is fixedly installed on one side of the guide tube 1301, and both sides of the clamping plate 13 are provided with a slide groove 1303. The slide groove 1303 is movably equipped with a buckle 1302 for clamping the charging module 11. A bellows 1304 located on one side of the buckle 1302 is embedded in the slide groove 1303 to slide the bellows 1304, and the bellows 1304 and the guide tube 1301 are connected in a through arrangement. Spring parts 1305 are embedded on both sides of the inside of the clamping plate 13, and the spring parts 1305 are located on the other side of the buckle 1302. Deionized water is provided in the guide tube 1301, and the deionized water is connected to one side of the Venturi tube 1201 through the guide tube 1301. During operation, the clamping plate 13 is installed on the rectifying plate 901 through the guide tube 1301, and is connected with the venturi tube 1201 through the guide tube 1301, so that the deionized water inside the venturi tube 1201 can be squeezed by the piston plate 1203 through the guide tube 1301 and flow into the bellows 1304. Since the bellows 1304 is located on one side of the buckle 1302, the bellows 1304 is expanded by the deionized water, thereby driving the buckle 1302 to move into the slide groove 1303, and then the connecting heads 1105 on both sides of the charging module 11 inserted into the electric box 9 are engaged, so as to achieve a stable clamping of the charging module 11. When the charging module 11 is taken out of the electric box 9, the air switch 902 is turned off to disconnect the rectifying plate 901 from the charging module 11. At this time, the electromagnet 1205 loses its magnetism, so that the spring member 1105 is pressed against the charging module 11. 202 pushes the piston plate 1203 to slide toward the inside of the venturi tube 1201 under the elastic potential energy, so that the magnetorheological fluid pushes the conductive sheet 1204 to slide to the other side. At the same time, the lock 10 is pressed down through the control of the communication module 8 when the power is off to facilitate the removal of the charging module 11, and then the charging module 11 that is powered off is slid out of the power box 9 for a certain distance to facilitate removal. Secondly, the piston plate 1203 draws deionized water from the guide tube 1301 into the venturi tube 1201, thereby reducing the pressure in the bellows 1304, so that the buckle 1302 retracts and moves under the elastic action of the spring member 1305. At the same time, the resetting effect of the buckle 1302 is improved by the spring member 1305 to cancel the engagement of the docking head 1105, and then the buckle 1302 is used to prevent the charging module 11 from being removed when the power is on, so that the charging module 11 can be removed and used easily when the power is off.

[0034] As an embodiment of the present invention, Figures 1 to 4 As shown, a cabinet door 2 is movably mounted on one end of the charging pile 1, and a display module 4 is provided on the cabinet door 2 to provide an intuitive operation interface and charging information display for the user. Shutters 3 are provided on both sides of the charging pile 1, and the shutters 3 are fixedly mounted on both sides of the electric box 9; During operation, during the operation of the charging module 11, the heat generated inside it is transferred to the air inside the electric box 9 through heat conduction, which increases the air temperature. Due to its low density, the hot air will naturally rise and be discharged from the electric box 9 through the gap between the upper blades of the louver 3. At the same time, the cold air from the outside enters the electric box 9 from the gap between the lower blades of the louver 3, forming natural convection, taking away the heat in the electric box 9, and realizing the heat dissipation of the charging module 11 and other equipment. Secondly, the equipment in the charging pile 1 is protected by the cabinet door 2, and the display module 4 is used to provide the user with an intuitive operation interface and charging information display, including charging status, charging power, charging time, billing information, fault prompts, etc. The user can understand the working status of the charging pile 1 through the display module 4 and perform corresponding operations.

[0035] As an embodiment of the present invention, Figure 2 and Figure 3 As shown, the charging pile 1 is provided with a power supply cable 501 for providing power, and the power supply cable 501 passes through the mounting carrier 6 and is electrically connected to the rectifier board 901. Charging guns 5 are provided on both sides of the charging pile 1, and the charging guns 5 are electrically connected to the charging module 11. The charging pile 1 is fixedly installed with a mounting carrier 6 for equipment installation, and the mounting carrier 6 is arranged on one side of the electric box 9. The power distribution metering module 7 and the communication module 8 are fixedly installed above the mounting carrier 6. The other side of the charging module 11 is provided with a stop lock 10, and the stop lock 10 is located on the electric box 9 and is movably connected. The stop lock 10 is connected to the power distribution metering module 7 by telecommunication. During operation, the communication module 8 transmits data with the power distribution metering module 7, the charging module 11 and other components through the data cable. On the one hand, the communication module 8 receives the working status information (such as temperature, voltage, current, etc.) from the charging module 11. On the other hand, it receives the control instructions (such as starting, stopping charging, adjusting the charging power, etc.) from the power distribution metering module 7 or the external control center, and accurately conveys these instructions to the charging module 11. At the same time, the communication module 8 uploads the real-time operation data of the charging pile 1 to the monitoring center, and the monitoring center can remotely manage and maintain the charging pile 1 based on these data. When in use, the external power supply introduces electric energy into the charging pile 1 through the power supply cable 501, and runs through the mounting carrier 6, and then realizes electrical connection with the rectifier board 901. The rectifier board 901 transmits power to the charging module 11, and converts the input power into direct current suitable for charging the battery of the electric vehicle through the charging module 11. When the charging module 11 is working normally, a control signal is sent to the gear lock 10 through the communication module 8, so that the gear lock 10 is in a locked state to prevent the charging module 11 from being taken out of the power box 9.

[0036] As an embodiment of the present invention, Figures 8 to 11 As shown, an output interface 1101 is provided on the other side of the charging module 11, and the output interface 1101 is electrically connected to the charging gun 5, a data interface 1103 is provided on the other side of the charging module 11, and the data interface 1103 is telecommunication-connected to the power distribution and metering module 7 and the communication module 8 through a data cable, an electrical connector 1105 is provided on one side of the charging module 11, and the electrical connectors 1105 are electrically connected to the conductive sheet 1204, a handle 1102 for taking and placing is fixedly installed on the other side of the charging module 11, and card slots 1104 are provided at both ends of one side of the charging module 11, and the card slots 1104 and the buckle 1302 are in an interlocking connection; During operation, the charging module 11 converts the input power into direct current suitable for charging the electric vehicle battery, and transmits the rectified direct current to the charging gun 5 through the output interface 1101, and transmits the operation data of the charging module 11 to the power distribution and metering module 7 and the communication module 8 through the data cable through the data interface 1103. When the user inserts the charging gun 5 and starts charging, the power distribution and metering module 7 starts to monitor key parameters such as current and voltage in real time. Secondly, it is electrically connected to the conductive sheet 1204 through the card slot 1104 to mechanically integrate the power input into the charging module 11 for conversion and use. When the charging module 11 needs to be disassembled for maintenance, replacement or other operations, the staff holds the handle 1102 on the charging module 11, applies a pulling force outward, and then takes it out for use.

[0037] Working principle: When working, the power is sent to the charging module 11, which is responsible for converting the input power into direct current suitable for charging the electric vehicle battery. During use, the communication module 8 is responsible for receiving the working status information from the charging module 11, and receiving control instructions from the power distribution metering module 7 or the external control center to ensure that these instructions are accurately conveyed to the charging module 11. In addition, the communication module 8 will also upload the real-time operation data of the charging pile 1 to the monitoring center for remote management and maintenance. When the charging module 11 is working normally, the communication module 8 sends a control signal to the block lock 10 to lock the state to prevent the module from being illegally removed. When the charging module 11 is inserted into the electrical box 9, the limit bar 904 ensures that the module slides accurately into the electrical box 9 along the predetermined track, and the electrical connector 1105 is inserted into the venturi tube 1201 and fits with the conductive sheet 1204 to form a current path. After the external power supply is connected, the current is transmitted to the rectifier board 901 through the power supply cable 501, and is transmitted to the charging module 11 through the cable tube 12 for rectification and transformation. The air switch 902 ensures that the current flows on the rectifier board 901 under normal working conditions. If a fault occurs inside the charging module 11, the air switch 902 will quickly cut off the power supply and disconnect the charging module 11 from the rectifier board 901. When the electrical connector 1105 is inserted into the other side of the Venturi tube 1201, the magnetorheological fluid pushes the piston plate 1203 to slide in the Venturi tube 1201 by squeezing the conductive sheet 1204, and compresses the spring member 1202. At this time, the piston plate 1203 squeezes the deionized water into the flow guide tube 1301. When the current flows through the electrical connector 1105 on the other side of the Venturi tube 1201 that is in contact with the conductive sheet 1204 through the cable tube 12, the electromagnet 1205 generates a magnetic force to change the viscosity of the magnetorheological fluid, so that the conductive sheet 1204 and the piston plate 1203 are blocked from moving in the Venturi tube 1201 and remain stationary. At the same time, the deionized water passes through the bellows 1304 in the flow guide tube 1301, so that the buckle 1302 is engaged and clamped with the electrical connector 1105. If a fault occurs inside the charging module 11, the resistance in the circuit decreases instantly. When the voltage remains unchanged, the current increases sharply, resulting in the conductive sheet 1204 and the piston plate 1203 being blocked from moving in the Venturi tube 1201. The metal diaphragm on the sheet 1204 melts due to overheating, the current path is disconnected, the electromagnet 1205 loses its magnetism and cannot maintain the magnetized state of the magnetorheological fluid. The spring member 1202 pushes the piston plate 1203 to slide toward the inside of the venturi tube 1201, quickly squeezing the magnetorheological fluid to the other side, and the card slot 1104 is covered by the fused conductive sheet 1204, cutting off the electrical connection between the charging module 11 and the rectifier plate 901. At the same time, the piston plate 1203 draws deionized water from the guide tube 1301 into the venturi tube 1201, canceling the engagement and clamping of the buckle 1302 and the electrical connector 1105. When the current path between the conductive sheet 1204 and the cable tube 12 is disconnected, the current of the rectifier plate 901 increases, and the electric control valve operates to open the jet hole on the inert gas tank 903, releasing the inert gas to fill the charging box 9, cooling the charging module 11 and preventing the internal components from overheating and burning. The guide tube 1301 and the clamping plate 13 are installed on the rectifier plate 901 and are connected with the venturi tube 1201, so that the deionized water can be squeezed by the piston plate 1203 through the guide tube 1301 to flow to the bellows 1304. The bellows 1304 is located on one side of the buckle 1302. The deionized water pushes the bellows 1304 to expand and stretch, driving the buckle 1302 to move into the slide groove 1303, and the connecting heads 1105 on both sides of the charging module 11 inserted into the electrical box 9 are engaged to achieve a stable clamping of the charging module 11. When the charging module 11 is taken out of the electrical box 9, the air switch 902 is turned off to disconnect the electrical connection between the rectifier plate 901 and the charging module 11. At this time, the electromagnet 1205 loses its magnetism and the spring member One 1202 pushes the piston plate 1203 to slide toward the inside of the Venturi tube 1201, and the magnetorheological fluid pushes the conductive sheet 1204 to slide to the other side. At the same time, the lock 10 is opened through the control of the communication module 8 when the power is off, so as to facilitate the removal of the charging module 11. The piston plate 1203 draws deionized water from the guide tube 1301 into the Venturi tube 1201, reduces the pressure in the bellows 1304, and causes the buckle 1302 to retract and move under the action of the spring part 1305. The spring part 1305 improves the resetting effect of the buckle 1302 and cancels the engagement of the docking head 1105. In this way, the buckle 1302 can prevent the charging module 11 from being removed when the power is on, and facilitates the removal and use of the charging module 11 when the power is off.

[0038] It should be noted that the magnetorheological fluid and deionized water are both non-conductive liquids.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular charging pile that is easy to maintain, comprising a charging pile (1), an electric box (9), and a plurality of charging modules (11) embedded in the electric box (9), characterized in that: One side of each charging module (11) is provided with a rectifier plate (901) for electrically connecting to an external power source, and each rectifier plate (901) is fixedly mounted on one side of an electric box (9), an inert gas tank (903) of inert gas is fixedly mounted on one side of each rectifier plate (901), and a plurality of cable tubes (12) fixedly mounted on the rectifier plate (901) are provided below the inert gas tank (903), and each of the plurality of cable tubes (12) is electrically connected to the rectifier plate (901); Electromagnets (1205) are fixedly mounted around the interior of the plurality of cable tubes (12); a Venturi tube (1201) is embedded in the cable tube (12), and the electromagnet (1205) is arranged around the middle outer side of the Venturi tube (1201); a spring member (1202) is embeddedly mounted on one side of the interior of the Venturi tube (1201); a piston plate (1203) that is in contact with the inner wall of the Venturi tube (1201) is fixedly mounted on one side of the spring member (1202); a conductive sheet (1204) is movably mounted on the other side of the Venturi tube (1201); the outer ring of the conductive sheet (1204) is a metal diaphragm; a magnetorheological fluid is arranged in the Venturi tube (1201), and the magnetorheological fluid is located between the piston plate (1203) and the conductive sheet (1204); A flow guide tube (1301) is provided between the inert gas tank (903) and the cable tube (12), and the flow guide tube (1301) is fixedly mounted on the rectifier plate (901) and is connected to the plurality of venturi tubes (1201). A clamping plate (13) is fixedly mounted on one side of the flow guide tube (1301), and slide grooves (1303) are provided on both sides of the clamping plate (13), and a clamping member for clamping the flow guide tube (1301) is movably mounted in the slide grooves (1303). A buckle (1302) is provided for holding the charging module (11); a bellows (1304) is mounted in the slide groove (1303) and is located on one side of the buckle (1302) to enable it to slide; the bellows (1304) and the guide tube (1301) are connected in a through-connection manner; two spring members (1305) are mounted on both sides of the interior of the clamp (13); and the two spring members (1305) are located on the other side of the buckle (1302).

2. A modular charging pile that is convenient for maintenance according to claim 1, characterized in that: The other side of the rectifier plate (901) is electrically connected to an air switch (902), and both sides of the charging module (11) are provided with limit bars (904) to center the charging module, and the limit bars (904) are fixedly connected to the electrical box (9).

3. A modular charging pile that is convenient for maintenance according to claim 1, characterized in that: A cabinet door (2) is movably mounted on one end of the charging pile (1), and a display module (4) is provided on the cabinet door (2) for providing a user with an intuitive operation interface and charging information display. Shutters (3) are provided on both sides of the charging pile (1), and the shutters (3) are fixedly mounted on both sides of the electric box (9).

4. A modular charging pile convenient for maintenance according to claim 3, characterized in that: A mounting plate (6) for equipment installation is fixedly installed inside the charging pile (1), and the mounting plate (6) is arranged on one side of the electric box (9), and a power distribution metering module (7) and a communication module (8) are fixedly installed and engaged above the mounting plate (6).

5. A modular charging pile convenient for maintenance according to claim 3, characterized in that: A power supply cable (501) for providing power is provided inside the charging pile (1), and the power supply cable (501) passes through the mounting carrier (6) and is electrically connected to the rectifier plate (901). Charging guns (5) are provided on both sides of the charging pile (1), and the charging guns (5) are electrically connected to the charging module (11).

6. A modular charging pile convenient for maintenance according to claim 1, characterized in that: The other side of the charging module (11) is provided with a blocking lock (10), and the blocking lock (10) is located on the electric box (9) and is engaged and movably connected, and the blocking lock (10) is electrically connected to the power distribution metering module (7).

7. A modular charging pile convenient for maintenance according to claim 1, characterized in that: An output interface (1101) is provided on the other side of the charging module (11), and the output interface (1101) is electrically connected to the charging gun (5). A data interface (1103) is provided on the other side of the charging module (11), and the data interface (1103) is telecommunication-connected to the power distribution metering module (7) and the communication module (8) via a data cable. An electrical connector (1105) is provided on one side of the charging module (11), and the electrical connector (1105) is electrically connected to the conductive sheet (1204).

8. A modular charging pile convenient for maintenance according to claim 7, characterized in that: A handle (1102) for taking and placing is fixedly mounted on the other side of the charging module (11), and both ends of one side of the charging module (11) are provided with a card slot (1104), and the card slot (1104) and the buckle (1302) are arranged in a chimeric connection.

9. A modular charging pile convenient for maintenance according to claim 1, characterized in that: Deionized water is arranged in the flow guide tube (1301), and the deionized water passes through the flow guide tube (1301) and is arranged inside one side of the Venturi tube (1201).

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