CN220764140U - Integrated electric energy distribution and monitoring device for automobile charging station - Google Patents

Abstract

The utility model belongs to the technical field of charging station power supply, and particularly relates to an integrated electric energy distribution and monitoring device of an automobile charging station, which comprises a MODBUS local area network and an Internet of things, wherein the MODBUS local area network is a master control network, the Internet of things is a slave control network, and the two networks realize data interconnection through a MODBUS master station controller; a plurality of secondary station protectors are arranged in the MODBUS local area network, and each secondary station protector comprises an electric energy metering module and a solid-state relay; the gateway of the Internet of things belongs to a slave station of the MODBUS local area network, the gateway of the Internet of things is accessed into the MODBUS local area network through a COM port (485 communication mode), the gateway of the Internet of things is linked to the Arian cloud platform, and the PC terminal or the mobile phone terminal is accessed into the Arian cloud platform; the electric energy metering module is used as a secondary station of the MODBUS local area network to collect charging parameters of the electric automobile, and an output control port of the MODBUS master station controller is connected with solid state relays of all charging piles to control on-off of power supply output of the charging piles. The utility model greatly increases the number of charging piles of the charging station on the premise of not improving the limit power supplied by the charging station.

Description

Integrated power distribution and monitoring device for car charging stations

Technical Field

The utility model belongs to the technical field of power supply for charging stations, and in particular relates to an integrated electric energy distribution and monitoring device for a vehicle charging station.

Background technique

The development of electric vehicles is an important strategy to implement the national energy conservation and emission reduction and the development of a low-carbon economy. Accelerating the construction of charging facilities and establishing a complete charging service are necessary conditions for promoting the development and application of electric vehicles. If electric vehicles want to travel freely, they must be equipped with special charging piles that can be charged quickly. The battery pack capacity of new electric vehicles is large, and charging requires a large power, especially when fast charging, the real-time power required for each vehicle reaches tens of kilowatts.

The essence of fast charging of charging piles is high-current DC supply charging. If multiple electric vehicles are guaranteed to charge quickly, the total power output of the charging station will be surprisingly large, which may cause the charging pile device to malfunction or burn out. Given the large charging current of electric vehicles, the number of charging piles installed in the station is usually limited, usually around 30 charging piles or slightly more. The output of a single charging pile is generally around 10 kilowatts. Based on this, the full-load power output of an electric vehicle charging station is about 300 kilowatts. 300 kilowatts is already a very large load for a charging station, but 30 charging piles can only meet the charging of 30 electric vehicles at most at the same time, which often cannot meet the charging needs of a large number of electric vehicles.

Summary of the invention

In order to solve the problems existing in the prior art, the utility model proposes an integrated power distribution and monitoring device for a car charging station. The MODBUS master station controller determines whether to adopt a PWM mode of fast rotation power supply according to the load and size of the charging output of the charging pile, thereby greatly increasing the number of charging piles in the charging station without increasing the maximum power supplied by the charging station.

In order to achieve the above purpose, the utility model adopts the following technical solutions:

The utility model provides an integrated electric energy distribution and monitoring device for a car charging station, comprising a MODBUS local area network and an Internet of Things, wherein the two networks realize data interconnection through a MODBUS master station controller; a plurality of slave station protectors are arranged in the MODBUS local area network, each of which is installed at the power frequency power input end of a charging pile in the charging station, and the slave station protector comprises an electric energy metering module and a solid-state relay; an Internet of Things gateway is also arranged in the MODBUS local area network, and the Internet of Things gateway is connected to the MODBUS local area network in the form of a MODBUS local area network slave station through a COM port, the Internet of Things gateway is linked to an Alibaba cloud platform, and a PC terminal or a mobile phone terminal is connected to the Alibaba cloud platform; a communication port of the MODBUS master station controller is connected to a plurality of electric energy metering modules to collect charging parameters of electric vehicles; an output control port of the MODBUS master station controller is connected to the solid-state relays of each charging pile to control the on and off of the power supply output of the charging pile; and a communication port of the MODBUS master station controller is connected to the Internet of Things gateway.

According to the integrated electric energy distribution and monitoring device for a car charging station of the utility model, further, the MODBUS master station controller uses Schneider TM200 series PLC.

According to the integrated power distribution and monitoring device for a car charging station of the utility model, further, the Internet of Things gateway selects a V-BOX E-4G Internet of Things gateway, and the V-BOX E-4G Internet of Things gateway is connected to the 485 communication serial port of the Schneider TM200 series PLC through the COM port as a slave station of the MODBUS local area network.

According to the integrated power distribution and monitoring device for a car charging station of the utility model, further, the V-BOXE-4G Internet of Things gateway and the MODBUS master station controller are installed in a mainframe box, and the mainframe box is arranged in a monitoring room.

According to the integrated electric energy distribution and monitoring device for a car charging station of the utility model, further, the electric energy metering module adopts a CL1X electric energy metering module, which collects the industrial frequency power supply current of the charging pile; the output end of the CL1X electric energy metering module is connected to a TTL-485 converter.

According to the integrated electric energy distribution and monitoring device for a car charging station of the utility model, further, a plurality of TTL-485 converters are connected to the 485 communication serial port of the Schneider TM200 series PLC in a daisy chain manner.

According to the integrated electric energy distribution and monitoring device for a vehicle charging station of the utility model, further, the Schneider TM200 series PLC expands the output control port by adding digital modules in cascade.

According to the integrated power distribution and monitoring device for automobile charging stations of the utility model, further, the V-BOXE-4G Internet of Things gateway is equipped with an Internet of Things traffic card or an RJ45 interface, which is connected to the Alibaba Cloud platform via the Internet or China Mobile, China Unicom, and China Telecom operators. The mobile phone terminal accesses the Alibaba Cloud platform through the 4G/5G network, and the PC terminal accesses the Alibaba Cloud platform through the Internet.

According to the integrated electric energy distribution and monitoring device for automobile charging station of the utility model, further, the slave station protector is installed inside the charging pile box or in the open air.

Compared with the prior art, the utility model has the following advantages:

The utility model collects the charging parameters of the electric vehicle through the electric energy metering module, and the MODBUS master station controller reads the industrial frequency power supply current of the charging pile. The master station controller makes adjustments to the continuous power supply or rapid rotation power supply of the charging pile according to the real-time data. At the same time, the master station controller sends the collected data to the Internet of Things gateway, and the Internet of Things gateway is linked to the Alibaba Cloud platform via the Internet or mobile, Unicom, and telecom operators to realize the data display of the remote PC terminal and mobile phone terminal of the Internet of Things. The rapid rotation power supply mode belongs to wide pulse power supply for a single electric vehicle. This wide pulse power-off state can make the power device of the charging pile of the electric vehicle in a heat dissipation state, giving enough time for the electrochemical reaction, and improving the efficiency of the chemical reaction of the lead-acid or lithium battery. The pulse high level of each batch of charging piles is staggered in time, so as to ensure that the real-time total output power of the charging station is lower than the output limit power of the charging station, and the total output power of the charging station can be kept within a safe range. Therefore, the utility model greatly increases the number of charging piles in the charging station without increasing the supply limit power of the charging station, and meets the charging needs of a large number of electric vehicles.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a topological diagram of an integrated electric energy distribution and monitoring device for a vehicle charging station according to an embodiment of the utility model;

FIG2 is a circuit diagram of an integrated electric energy distribution and monitoring device for a vehicle charging station according to an embodiment of the utility model;

FIG. 3 is an exemplary diagram of rapid alternating power supply according to an embodiment of the present utility model.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

As shown in FIG1 , the integrated power distribution and monitoring device for the automobile charging station of this embodiment includes a MODBUS local area network and an Internet of Things, and the two networks realize data interconnection through a MODBUS master station controller. A plurality of slave station protectors are arranged in the MODBUS local area network, each of which is installed at the power frequency power input end of a charging pile in the charging station, and the slave station protector includes an electric energy metering module and a solid-state relay. The slave station protector can be installed inside the charging pile box or in the open air, and the main circuit board of the slave station protector is installed inside the waterproof box to prevent damage to the circuit board by wind, rain and dust. An Internet of Things gateway is also arranged in the MODBUS local area network, and the Internet of Things gateway is connected to the MODBUS local area network through the COM port as a MODBUS local area network slave station, and the Internet of Things gateway is linked to the Alibaba Cloud platform, and the PC terminal or mobile phone terminal is connected to the Alibaba Cloud platform. As shown in FIG2 , the communication port of the MODBUS master station controller is connected to a plurality of electric energy metering modules to collect the charging parameters of the electric vehicle; the output control port of the MODBUS master station controller is connected to the solid-state relay of each charging pile to control the on and off of the power supply output of the charging pile, and the communication port of the MODBUS master station controller is connected to the Internet of Things gateway.

Specifically, the IoT gateway uses V-BOX E-4G IoT gateway, and the MODBUS master controller uses Schneider TM200C16T of the TM200 series PLC. The selection of this PLC is based on the high reliability and high cost-effectiveness of the MODBUS master controller for industrial-grade applications. The V-BOX E-4G IoT gateway and the MODBUS master controller are installed in the mainframe box, which is set in the monitoring room.

The energy metering module uses the CL1X energy metering module, which can simultaneously collect 9 energy parameters of the load, including voltage, current, active power, power factor, power supply frequency, reactive power, apparent power, active power and power meter. This example mainly uses the power supply current of the charging pile (the power supply voltage is usually 220V AC), and multiple charging piles are identified and distinguished by their MODBUS slave address numbers. The output end of each CL1X energy metering module is also connected to a TTL-485 converter, which can convert the serial port TTL level to RS485 level. Multiple TTL-485 converters are connected to the 485 communication serial port of Schneider TM200 series PLC in a daisy chain manner.

The PLC controller has a 485 communication serial port. The V-BOX E-4G IoT gateway is connected to the 485 communication serial port of the PLC controller through the COM port as a slave station of the MODBUS LAN, where D1 is connected to the + end of 485 and D0 is connected to the - end of 485. In this example, the slave number of the IoT gateway can be set to 1, and the slave numbers of the CL1X power metering modules are 2, 3, 4 to 135. The PLC controller reads the data of the 2nd and other CL1X power metering modules, extracts the required current value, and sends it to the 1st slave station V-BOX E-4G IoT gateway.

The TM200C16T of Schneider's TM200 series PLC has 7 output ports, which can realize the protective output power supply control of 7 charging piles. The output control ports can be expanded by adding digital modules in cascade, and the number of output control ports can be expanded to 135.

The V-BOX E-4G IoT gateway is equipped with an IoT traffic card or RJ45 interface, which is connected to the Alibaba Cloud platform via the Internet or China Mobile, China Unicom, or China Telecom operators. Mobile terminals access the Alibaba Cloud platform through 4G/5G networks, and PC terminals access the Alibaba Cloud platform through the Internet. PC terminals or mobile terminals can interact with the main control LAN data through the Alibaba Cloud platform. System maintenance personnel and electric vehicle owners can learn about the real-time working status of the charging piles through the mobile phone or PC monitoring interface.

As a preferred solution, a local human-machine interface slave station can be added to the MODBUS local area network to display the power data of the slave charging pile and control the power supply output of the slave charging pile.

Here’s how it works:

Assuming that the output power of a single charging pile is 10 kilowatts and the output limit power of the charging station is 300 kilowatts, then a single batch can only meet the needs of 30 charging piles to charge 30 electric vehicles at the same time. The maximum number of electric vehicles charged in a single batch is based on the maximum power that the charging station can provide. In order to meet the charging needs of a large number of electric vehicles, the number of charging piles is increased from 30 to 135. If all electric vehicles are powered at the same time, the total power can reach: 10 kilowatts * 135 = 1350 kilowatts, which far exceeds the output limit power of the charging station of 300 kilowatts. Entering the fast rotation power supply can keep the real-time total output power of the charging station unchanged (the total power is still 300 kilowatts).

Under normal circumstances, the MODBUS master controller monitors the current value of each charging pile in real time, and sends electrical parameter data to the mobile terminal or PC terminal through the Internet of Things gateway, and can receive control information from the terminal. If one or more electric vehicles are involved in charging, the MODBUS master controller will monitor the data changes in real time. If the total load of the charging cars is lower than the total load value of a single batch (for example, 30 cars are charging) of the charging station (for example, 300 kilowatts), the charging system guarantees normal and continuous power supply for the batch of electric vehicles. If the total load of the charging cars is higher than the total load value of a single batch of the charging station, it is detected whether the total number of charging cars at this time exceeds the total number of a single batch; if it exceeds and the load value exceeds the standard, these electric vehicles are divided into several batches according to the multiple relationship of the total number of single batches (for example, more than 30 vehicles are divided into 2 batches, more than 60 vehicles are divided into 3 batches), and the system enters the stage of fast rotation to supply power to each batch of electric vehicles. The principle of batch selection is based on the increasing sequence of the station numbers of the used charging piles (for example: if the charging piles from stations 2-31 are all used, they are divided into the first batch; if the charging piles from stations 32-61 are all used, they are divided into the second batch; if there is a station number or multiple station numbers in the middle that are not used, the sequence number is postponed, and so on). As shown in Figure 3, when 2 or 3 batches of electric vehicles are connected to the charging pile system, the MODBUS master station controller realizes continuous current supply to a single batch of electric vehicles in a fixed period of time, and then quickly turns off the power supply of the batch of electric vehicles, switches to the power supply of the next batch of electric vehicles, and then executes it in a cycle, using the PWM mode of rapid rotation power supply so that the instantaneous total power of the charging station does not exceed the maximum power of the charging station. If the number of charging vehicles is reduced to the point where the total load is lower than the total load of a single batch of the charging station, the normal continuous power supply to the batch of electric vehicles is restored.

If the total number of charging cars does not exceed the total number of a single batch (for example, 30 cars are charging) and the load value exceeds the standard, check the output current value of the batch of charging piles one by one. There must be one or more charging piles with abnormal output, and immediately disconnect the power supply output of the charging pile. At this time, manual intervention is required for detection and maintenance.

The MODBUS master controller is connected to the mobile terminal or PC terminal through the V-BOX E-4G IoT gateway and the Alibaba Cloud platform. The mobile terminal and PC terminal can read or control the working status of the charging pile.

Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "a" or "an" and the like used in the specification and claims of this application do not necessarily indicate a quantity limitation. The words "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

Finally, it should be noted that the above is only a preferred embodiment of the utility model, which is only used to illustrate the technical solution of the utility model, and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model are included in the protection scope of the utility model.

Claims (9)

1. The integrated electric energy distribution and monitoring device for the automobile charging station is characterized by comprising a MODBUS local area network and an Internet of things, wherein the two networks are connected with each other through a MODBUS master station controller; a plurality of secondary station protectors are arranged in the MODBUS local area network, each secondary station protector is arranged at the power frequency power input end of one charging pile in a charging station, and each secondary station protector comprises an electric energy metering module and a solid-state relay; an Internet of things gateway is further arranged in the MODBUS local area network, the Internet of things gateway is connected into the MODBUS local area network through a COM port in a mode of an MODBUS local area network slave station, the Internet of things gateway is connected to an Arian cloud platform, and a PC terminal or a mobile phone terminal is connected into the Arian cloud platform; the communication port of the MODBUS master station controller is connected with a plurality of electric energy metering modules, and charging parameters of the electric automobile are collected; an output control port of the MODBUS master station controller is connected with the solid-state relay of each charging pile to control the on-off of the power supply output of the charging pile; and the communication port of the MODBUS master station controller is connected with the Internet of things gateway.

2. The integrated power distribution and monitoring device of claim 1, wherein the MODBUS master station controller is a schrader (TM) 200 series PLC.

3. The integrated electric energy distribution and monitoring device of the automobile charging station according to claim 2, wherein the internet of things gateway is a V-BOX E-4G internet of things gateway, and the V-BOX E-4G internet of things gateway is used as a slave station of the MODBUS local area network and is connected to a 485 communication serial port of schneider TM200 series PLC through a COM port.

4. The integrated power distribution and monitoring device for a vehicle charging station of claim 3, wherein the V-BOX E-4G internet of things gateway and the MODBUS master station controller are mounted in a mainframe BOX that is disposed in a monitoring room.

5. The integrated power distribution and monitoring device of a vehicle charging station of claim 2, wherein the power metering module is a CL1X power metering module that collects power frequency supply current of the charging post; and the output end of the CL1X electric energy metering module is connected with a TTL-485 converter.

6. The integrated power distribution and monitoring device of claim 5, wherein the plurality of TTL-485 converters are daisy chained to 485 communication serial ports of schrader (TM) 200 series PLCs.

7. The integrated power distribution and monitoring device of a vehicle charging station of claim 2, wherein the schneider (TM) 200 series PLC extends the output control port by cascading digital modules.

8. The integrated electric energy distribution and monitoring device of the automobile charging station according to claim 3, wherein the V-BOX E-4G Internet of things gateway is provided with an Internet of things flow card or RJ45 interface, the Internet of things flow card or RJ45 interface is linked with the oricloud platform through Internet or mobile, mobile and telecom operators, the mobile phone terminal is accessed to the oricloud platform through a 4G/5G network, and the PC terminal is accessed to the oricloud platform through the Internet network.

9. The integrated power distribution and monitoring device of claim 1, wherein the secondary station protector is mounted inside a charging pile housing or in the open air.