CN213275795U

CN213275795U - AC metering device for AC charging facility

Info

Publication number: CN213275795U
Application number: CN202021882852.5U
Authority: CN
Inventors: 吴名功; 潘宗岭; 吴安平; 吴晓燕; 陈磊; 李林; 何刚; 张玉梅; 王一方
Original assignee: ANHUI INSTITUTE OF METROLOGY
Current assignee: ANHUI INSTITUTE OF METROLOGY
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-05-25
Anticipated expiration: 2030-08-31

Abstract

The utility model provides an alternating current metering device for alternating current charging facility, including MCU module and with the data storage module that the MCU module is connected, metering module and communication module for gathering charging facility operating data in real time, metering module includes the chip and the collection circuit that the model is RN8209, the collection circuit includes voltage acquisition circuit and electric current acquisition circuit; the voltage acquisition circuit comprises a first capacitor circuit with two ends respectively connected with a V1P pin and a V1N pin of the RN8209 chip, and a first resistor circuit connected in parallel with the first capacitor circuit, and the current acquisition circuit comprises a second capacitor circuit with two ends respectively connected with a V3P pin and a V3N pin of the RN8209 chip, and a second resistor circuit connected in parallel with the second capacitor circuit. The utility model discloses an integrated metering device realizes the real-time data acquisition and the measurement function to exchanging the facility that charges, simultaneously through the network data access, can real-time on-line monitoring device data, has reduced the input of manpower, material resources in the measurement process.

Description

AC metering device for AC charging facility

Technical Field

The utility model relates to a new forms of energy technical field of metering module equipment is a metering module device for exchanging facility of charging.

Background

With the continuous progress of the technology in the technical field of new energy, new energy automobiles are more and more popular among consumers, and the holding capacity of the new energy automobiles is steadily improved. The demand of alternating current charging facilities used in cooperation with new energy automobiles is increasing day by day, the charging facilities are used as energy input equipment of the new energy automobiles, power transmission line systems of national power grids are mostly used in power input systems of the charging facilities, and after long-time high-power use, a series of problems such as aging and service life reduction of electrical elements occur. Especially in the aspect of electric energy metering, long-term use can cause the deviation of whole metering data, influences the normal use of charging facility.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a metering module device for exchanging facility of charging, this metering module device realizes the intelligent on-line measuring measurement of battery charging outfit.

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

an alternating current metering device for an alternating current charging facility comprises an MCU module, a data storage module connected with the MCU module, a metering module for collecting charging facility operation data in real time and a communication module, wherein the metering module comprises a chip with the model of RN8209 and a collecting circuit, and the collecting circuit comprises a voltage collecting circuit and a current collecting circuit; the voltage acquisition circuit comprises a first capacitor circuit with two ends respectively connected with a V1P pin and a V1N pin of the RN8209 chip, and a first resistor circuit connected in parallel with the first capacitor circuit, and the current acquisition circuit comprises a second capacitor circuit with two ends respectively connected with a V3P pin and a V3N pin of the RN8209 chip, and a second resistor circuit connected in parallel with the second capacitor circuit.

Further, the first capacitor circuit comprises capacitors C1 and C2 which are connected in series, the first resistor circuit comprises capacitors R1, R2, R3 and R4 which are connected in series, the middle positions of the capacitors C1 and C2 are connected with the middle positions of the resistors R2 and R3 through a first branch line, the first branch line is grounded, and the other ends of the resistors R2 and R3 are connected with a voltage input signal;

the two capacitor circuits comprise serially connected C3 and C4, the resistor circuit comprises serially connected R5, R6, R7 and R8, the middle positions of the capacitors C3 and C4 are connected with the middle positions of the resistors R6 and R7 through a branch line two, the branch line two is grounded, the middle positions of the resistors R5 and R6, R7 and R8 are respectively connected with a pin 1 and a pin 2 of a Hall current sensor PT2011, a pin 3 of the Hall current sensor PT2011 is connected with the serially connected resistors R10 and R11, and a pin 4 of the Hall current sensor PT2011 is connected with the serially connected resistors R12 and R13.

Further, the communication module comprises a 4G communication module providing a data access function for an internet platform and an internet of things platform and a 485 asynchronous communication module providing local data terminal access, metering calibration, data communication and function expansion of equipment.

Further, the MCU module comprises a chip with the model number of STM32103VE and peripheral circuits thereof.

Further, the data storage module comprises a chip with the model number of AT24C128 and peripheral circuits thereof.

Further, the 4G communication module includes a chip of model N720 and its peripheral circuits.

Further, the 485 asynchronous communication module comprises a chip with the model of RS485 and a peripheral circuit thereof.

Furthermore, the 4G communication module is connected with a big data platform and uploads the related parameter information to the big data platform.

The utility model discloses an integrated MCU module, data storage module, metering module, 4G communication module and 485 asynchronous communication module realize exchanging the real-time data acquisition and the measurement function of the facility that charges, simultaneously through the network data access, can real-time on-line monitoring device data, reduced the input of manpower, material resources in the measurement process.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the circuit connection of the present invention;

fig. 3 is a schematic diagram of the metering module and the collecting circuit of the present invention.

Detailed Description

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

The alternating current metering device for the alternating current charging facility shown in fig. 1 comprises an MCU module, a data storage module connected with the MCU module, a metering module for collecting the operating data of the charging facility in real time, and a communication module, wherein the metering module comprises a chip with the model number of RN8209 and a collecting line, and the collecting line comprises a voltage collecting line and a current collecting line; the voltage acquisition circuit includes that both ends are connected with RN8209 chip V1P foot, V1N foot respectively capacitance circuit one, and with capacitance circuit one parallelly connected, the current acquisition circuit include both ends respectively with RN8209 chip V3P foot, the capacitance circuit two that V3N foot is connected, and with the resistance circuit two that capacitance circuit two is parallelly connected. The first capacitor circuit comprises capacitors C1 and C2 which are connected in series, the first resistor circuit comprises capacitors R1, R2, R3 and R4 which are connected in series, the middle positions of the capacitors C1 and C2 are connected with the middle positions of the resistors R2 and R3 through a first branch line, the first branch line is grounded, and the other ends of the resistors R2 and R3 are connected with a voltage input signal;

the MCU module of the preferred embodiment includes a chip of model STM32103VE and its peripheral circuits, and is a central data processing unit of the metering module device, and mainly provides functions of cooperative processing of each functional module, data transfer processing, and the like; the data storage module comprises a chip with the model number of AT24C128 and a peripheral circuit thereof, and the module is a data storage unit of the metering module device and mainly provides data storage and configuration storage functions of device equipment; the 4G communication module comprises a chip with the model number of N720 and a peripheral circuit thereof, and is a network communication module of the metering module device and provides a data access function for an internet platform and an internet of things platform; the 485 asynchronous communication module comprises a chip with the model of RS485 and a peripheral circuit thereof, and is an asynchronous serial communication module of the metering module device, and the asynchronous serial communication module provides a local data terminal access function of equipment and completes functions of metering calibration, data communication, function expansion and the like; the metering module comprises a chip with the model of RN8209 and a collecting circuit, wherein the collecting circuit comprises a voltage collecting circuit and a current collecting circuit, the voltage collecting circuit collects the voltage difference of a DC + and a DC-two-section circuit of an AC bus of an AC charging facility as the standard value of voltage, the current collecting circuit accesses the sensor into the bus through an external Hall current sensor, the obtained voltage-to-current value serves as the current standard value, the high-precision collecting function of real-time data such as voltage, current and power is provided, and the function of accumulating and metering electric energy data is also provided.

Specifically, the voltage acquisition circuit comprises a first capacitor circuit and a first resistor circuit, wherein two ends of the first capacitor circuit are respectively connected with a V1P pin and a V1N pin of an RN8209 chip, and the first resistor circuit is connected with the first capacitor circuit in parallel, the first capacitor circuit comprises capacitors C1 and C2 which are connected in series, the first resistor circuit comprises R1, R2, R3 and R4 which are connected in series, the middle positions of the capacitors C1 and C2 are connected with the middle positions of the resistors R2 and R3 through a first branch line, the first branch line is grounded, and the other ends of the resistors R2 and R3 are connected with voltage input signals; the current acquisition circuit comprises a second capacitor circuit and a second resistor circuit, wherein two ends of the second capacitor circuit are respectively connected with a V3P pin and a V3N pin of an RN8209 chip, the second capacitor circuit is connected with the second capacitor circuit in parallel, the second capacitor circuit comprises C3 and C4 which are connected in series, the resistor circuit comprises R5, R6, R7 and R8 which are connected in series, the middle positions of C3 and C4 and the middle positions of R6 and R7 are connected through a second branch line, the second branch line is grounded, the middle positions of R5, R6, R7 and R8 are respectively connected with a 1 pin and a 2 pin of a Hall current sensor PT2011, the 3 pin of the Hall current sensor 2011 is connected with resistors R10 and R11 which are connected in series, and the 4 pin of the Hall current sensor PT2011 is connected with resistors R12 and R13 which are connected in series.

In specific use, the alternating current metering device is suitable for alternating current charging facilities, when equipment leaves a factory, the metering module is subjected to data calibration through the 485 asynchronous communication module, the metering precision reaches 0.5%, relevant configuration parameter attributes are stored in the data storage module, the 4G communication module completes dialing action through the SIM card to be connected with a corresponding large data platform, access work with the platform is completed, and meanwhile required relevant parameter information can be uploaded on line.

The above-mentioned embodiments are only to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. An alternating current metering device for an alternating current charging facility is characterized by comprising an MCU module, a data storage module connected with the MCU module, a metering module for collecting operating data of the charging facility in real time and a communication module, wherein the metering module comprises a chip with the model of RN8209 and a collecting circuit, and the collecting circuit comprises a voltage collecting circuit and a current collecting circuit; the voltage acquisition circuit comprises a first capacitor circuit with two ends respectively connected with a V1P pin and a V1N pin of the RN8209 chip, and a first resistor circuit connected in parallel with the first capacitor circuit, and the current acquisition circuit comprises a second capacitor circuit with two ends respectively connected with a V3P pin and a V3N pin of the RN8209 chip, and a second resistor circuit connected in parallel with the second capacitor circuit.

2. The ac metering device for the ac charging facility of claim 1, wherein the first capacitor circuit includes capacitors C1, C2 connected in series, the first resistor circuit includes capacitors R1, R2, R3, R4 connected in series, the middle position of the capacitors C1, C2 is connected to the middle position of the resistors R2, R3 through a first branch line, the first branch line is grounded, and the other ends of the resistors R2, R3 are connected to the voltage input signal;

3. The ac metering device for ac charging facilities of claim 1, wherein the communication module comprises a 4G communication module providing data access function to internet platform and internet of things platform and a 485 asynchronous communication module providing local data end access, metering calibration, data communication and function extension of the device.

4. An ac metering device for an ac charging facility according to claim 1, wherein the MCU module includes a chip model number STM32103VE and its peripheral circuits.

5. An ac metering device for an ac charging facility according to claim 1, wherein the data storage module comprises a chip of type AT24C128 and its peripheral circuitry.

6. The AC metering device for the AC charging facility of claim 3, wherein the 4G communication module comprises a model N720 chip and its peripheral circuits.

7. The ac metering device of claim 3, wherein the 485 asynchronous communication module comprises an RS485 chip and its peripheral circuits.

8. The AC metering device for the AC charging facility as claimed in claim 3, wherein the 4G communication module is connected with a big data platform and uploads related parameter information to the big data platform.