Protocol conversion device suitable for large-scale AC / DC charging pile

Abstract

The utility model relates to the technical field of low-voltage transformer area charging piles, in particular to a protocol conversion device suitable for a large-scale alternating current and direct current charging pile, which comprises a miniature circuit breaker and a protocol conversion module which are fixedly connected, and a microprocessor, a voltage transformer, a current transformer and a humidity sensor are arranged in the miniature circuit breaker. The dual-mode communication module, the HPLC communication interface and the micro-power wireless communication interface are all electrically connected with the microprocessor, and the protocol conversion module comprises a protocol conversion chip, an RS485 interface and a CAN interface which are all electrically connected with the microprocessor; an alternating current and direct current charging pile comprises a protocol conversion device and further comprises a power supply, a control unit A and a control unit B. The internal space of the charging pile can be saved, and intelligent charging management is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage charging piles, in particular to a protocol conversion device suitable for large-scale AC and DC charging piles. Background Art

[0002] The new power system is an important component of the new energy system and a key carrier for achieving the "dual carbon" goal. As an important part of the new power system, the operation data of charging piles is of great significance to the construction of a new power system with the characteristics of "minimized accurate collection and platform big data deduction". However, at present, the operation data of charging piles and the operation data of the substation are under the jurisdiction of different departments and different management master stations. It is necessary to open up the underlying data channel and realize unified data collection to complete the monitoring of the overall operation data of the substation.

[0003] As an important part of the "end" of the "cloud-pipe-edge-end" architecture of the Internet of Things for smart charging piles, the intelligent charging function of the charging piles is particularly important for connected trams. Among them, AC and DC charging piles have both AC charging and DC charging modes. It is very important to be able to intelligently charge trams according to actual needs, which can not only improve charging efficiency but also save energy.

[0004] In addition, as an integrated product, the charging pile itself has limited internal space. During the iterative upgrade process of the charging pile, it is necessary to utilize the space as much as possible while ensuring the realization of functions. Utility Model Content

[0005] The utility model provides a protocol conversion device suitable for large AC and DC charging piles.

[0006] The technical solution of this utility model is as follows:

[0007] A protocol conversion device suitable for large AC and DC charging piles, comprising a fixedly connected miniature circuit breaker and a protocol conversion module.

[0008] The miniature circuit breaker is internally provided with a microprocessor, a voltage transformer, a current transformer and a humidity sensor, and the voltage transformer, the current transformer and the humidity sensor are all electrically connected to the microprocessor.

[0009] The miniature circuit breaker is also provided with a dual-mode communication module, an HPLC communication interface and a micro-power wireless communication interface, which are all electrically connected to the microprocessor. The HPLC communication interface and the micro-power wireless communication interface are electrically connected to the dual-mode communication module.

[0010] The protocol conversion module comprises a protocol conversion chip, an RS485 interface and a CAN interface, all of which are electrically connected to the microprocessor.

[0011] Specifically, the miniature circuit breaker type is a 2P miniature circuit breaker or a 4P miniature circuit breaker.

[0012] Preferably, the width of the protocol conversion module is 1.5P.

[0013] Preferably, the protocol conversion module is provided with a status indicator light and a switching switch which are electrically connected to the microprocessor.

[0014] Preferably, the status indicator light is an LED indicator light.

[0015] Specifically, the RS485 interface and the CAN interface are used for communication connection with the AC / DC charging piles, and the HPLC communication interface and the micro-power wireless communication interface are used for communication connection with the fusion terminal in the area where the AC / DC charging piles are located.

[0016] Specifically, the miniature circuit breaker is provided with a power connection terminal electrically connected to the microprocessor, and electrically connected to the power supply of the AC / DC charging pile.

[0017] Furthermore, it also includes a power supply electrically connected to the protocol conversion device, a control unit A for controlling AC charging and a control unit B for controlling DC charging respectively connected to the protocol conversion device for communication,

[0018] The control unit A and the control unit B are both electrically connected to a power source,

[0019] The control unit A is electrically connected to a charging gun A that outputs alternating current, and the control unit B is electrically connected to a charging gun B that outputs alternating current.

[0020] Specifically, the control unit A, the control unit B and the power supply are all powered by DC 12V.

[0021] Preferably, the control unit A and the control unit B are both communicatively connected to the RS485 interface and the CAN interface of the protocol conversion device.

[0022] The beneficial effects of the utility model are:

[0023] (1) The utility model is a protocol conversion device suitable for large AC and DC charging piles. The protocol conversion device adopts a 1.5P width form and can be directly integrated and installed in the position of the miniature circuit breaker in the charging pile. There is no need to change the internal layout of the charging pile, reduce the number of internal components of the charging pile, reduce installation costs, and save space inside the charging pile.

[0024] (2) The integrated protocol conversion device is equipped with multiple communication interfaces and supports multiple communication protocols, which improves the compatibility of AC and DC charging piles with other systems, realizes unified data collection and transmission, converts the data of the charging piles into a format compatible with other systems, facilitates data interaction and communication with the substation management master station, and realizes more intelligent charging management.

[0025] (3) The protocol conversion device of the utility model can realize remote monitoring of the charging of AC and DC charging piles. According to the charging demand of the vehicle and the load of the power grid, the charging pile can be remotely controlled to switch between AC charging and DC charging by switching the switch, thereby improving the charging efficiency and increasing the flexibility of the charging pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0027] In the attached picture:

[0028] Figure 1 This is a schematic diagram of the components of each module of a protocol conversion device suitable for a large AC / DC charging pile in an embodiment;

[0029] Figure 2 It is a front view of a protocol conversion device suitable for a large AC / DC charging pile in an embodiment;

[0030] Figure 3 It is a structural schematic diagram of an AC / DC charging pile in an embodiment;

[0031] The components represented by the reference numerals in the figure are:

[0032] 1. Miniature circuit breaker; 2. Protocol conversion module; 3. Status indicator light; 4. Switch. DETAILED DESCRIPTION

[0033] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0034] Example

[0035] This embodiment provides a protocol conversion device suitable for large AC and DC charging piles, see Figure 1 , Figure 2 and Figure 3 , including fixedly connected miniature circuit breakers and protocol conversion modules,

[0036] The miniature circuit breaker is internally provided with a microprocessor, a voltage transformer, a current transformer and a humidity sensor, and the voltage transformer, the current transformer and the humidity sensor are all electrically connected to the microprocessor.

[0037] The miniature circuit breaker is also provided with a dual-mode communication module, an HPLC communication interface and a micro-power wireless communication interface, which are all electrically connected to the microprocessor. The HPLC communication interface and the micro-power wireless communication interface are electrically connected to the dual-mode communication module.

[0038] The protocol conversion module comprises a protocol conversion chip, an RS485 interface and a CAN interface, all of which are electrically connected to the microprocessor.

[0039] Specifically, in the present invention, the AC power generated by the power grid system can be converted into DC power through the transformer, rectifier, filter and other power components in the charging pile, and then used to charge the electric vehicle through the charging gun, or it can be directly transmitted to the on-board charger of the electric vehicle for AC charging through the charging gun of the charging pile.

[0040] As the core processing unit of the protocol conversion device, the microprocessor is responsible for controlling the operation of the entire protocol conversion device.

[0041] The protocol conversion module is used to convert different communication protocols. The protocol conversion module includes a protocol conversion chip, an RS485 interface, and a CAN interface. The protocol conversion chip is used to convert the charging pile MODBUS protocol to the DL / T645-2007 or DL / T698.45 protocol, so that the AC / DC charging pile can communicate with different power equipment and power grid systems. The width of the protocol conversion module is 1.5P. The 1.5P width setting allows the protocol conversion module to be compatible with miniature circuit breakers of different sizes while maintaining compactness of installation.

[0042] The RS485 interface and CAN interface of the protocol conversion module are used to communicate with the AC and DC charging piles. The protocol conversion device can communicate with the control unit A and control unit B of the charging piles through the RS485 interface or the CAN interface to collect the operating data of the AC and DC charging piles; the HPLC communication interface and the micro-power wireless communication interface are used to communicate with the area management master station of the area where the AC and DC charging piles are located, upload the collected operating data of the charging piles, and obtain instructions for transmission to the AC and DC charging piles.

[0043] The protocol conversion module is provided with a status indicator light and a switching switch which are electrically connected to the microprocessor. The status indicator light is an LED indicator light which displays the charging status of the AC / DC charging pile by changing the color of the indicator light. The switching switch is electrically connected to the microprocessor, receives a switching signal from the area where the AC / DC charging pile is located through an HPLC communication interface and a micro-power wireless communication interface, and transmits the switching signal to control unit A or control unit B accordingly, so as to perform remote automatic switching of the AC charging or DC charging mode.

[0044] The miniature circuit breaker is a protective device for the internal circuit of the AC / DC charging pile. It is used to automatically cut off the power supply of the AC / DC charging pile in the event of overload or short circuit to prevent equipment damage or contact accidents. The miniature circuit breaker type is 2P miniature circuit breaker or 4P miniature circuit breaker. The 2P miniature circuit breaker is suitable for the protection of two-pole input and is usually used in single-phase systems. The 4P miniature circuit breaker is suitable for the protection of four-pole input and is usually used in three-phase systems to provide protection for the neutral line and the ground line. This embodiment uses a 4P circuit breaker, see Figure 2 .

[0045] The miniature circuit breaker is provided with a power connection terminal electrically connected to the microprocessor, and electrically connected to the power supply of the AC / DC charging pile, so as to obtain power supply from the power supply of the AC / DC charging pile.

[0046] A microprocessor, a voltage transformer, a current transformer and a humidity sensor are arranged inside the miniature circuit breaker, and the voltage transformer, the current transformer and the humidity sensor are all electrically connected to the microprocessor, wherein the voltage transformer and the current transformer are used to monitor the voltage and current of the charging pile in real time, the voltage transformer is an electromagnetic voltage transformer, and the current transformer is an electromagnetic current transformer. The voltage and current data are transmitted to the microcontroller, and the microcontroller transmits the data to the main station of the substation management through the HPLC communication interface or the micro-power wireless communication interface. When the main station of the substation management detects a short circuit or overload fault of the AC or DC charging pile, a signal is sent to the microprocessor, and the microprocessor controls the circuit breaker to cut off the power supply, and the charging pile stops charging.

[0047] The humidity sensor is used to monitor the humidity data of the internal environment of the AC and DC charging pile in real time. The humidity sensor is a resistive humidity sensor. The humidity data is transmitted to the microcontroller, and the microcontroller transmits the humidity data to the main station for area management. When the humidity value exceeds the set threshold, the main station for area management remotely sends a signal to the microcontroller, and the microprocessor controls the micro circuit breaker to cut off the power supply, and the charging pile stops charging to avoid charging accidents caused by excessive humidity.

[0048] The miniature circuit breaker is also provided with a dual-mode communication module, an HPLC communication interface and a micro-power wireless communication interface, which are all electrically connected to the microprocessor. The HPLC communication interface and the micro-power wireless communication interface are electrically connected to the dual-mode communication module. The dual-mode communication module is used for the protocol conversion device to communicate with the external system through both wired and wireless communication methods. The HPLC communication interface and the micro-power wireless communication interface are used to communicate with the fusion terminal of the substation where the AC and DC charging piles are located, transmit the real-time switch status of the miniature circuit breaker to the substation fusion terminal, and receive remote control instructions from the substation fusion terminal.

[0049] The utility model also includes an AC / DC charging pile, including a protocol conversion device, a power supply electrically connected to the protocol conversion device, a control unit A for controlling AC charging and a control unit B for controlling DC charging respectively connected to the protocol conversion device for communication,

[0050] The control unit A and the control unit B are both electrically connected to a power source,

[0051] The control unit A is electrically connected to a charging gun A that outputs alternating current, and the control unit B is electrically connected to a charging gun B that outputs alternating current.

[0052] Among them, the power supply is used to provide the electric energy required by the AC and DC charging piles, the control unit A is used to control the AC charging of the charging pile, and the control unit B is used to control the DC charging of the charging pile. The control unit A is electrically connected to the charging gun A that outputs AC power, and the charging gun A outputs AC power to the electric vehicle; the control unit B is electrically connected to the charging gun B that outputs AC power, and the charging gun B outputs DC power to the electric vehicle for DC fast charging. DC 12V (direct current 12 volts) is used to power the control unit A and the control unit B and the charging pile power supply.

[0053] The structural setting of the utility model is compact, which realizes the effective utilization of the internal space of the AC / DC charging pile and the integration of functions, simplifies installation and maintenance. At the same time, the protocol conversion device provided by the utility model can directly replace the traditional miniature circuit breaker, which is convenient for upgrading and transformation of existing AC / DC charging piles.

[0054] The protocol conversion device provided by the utility model can enable the AC / DC charging pile to switch between AC charging and DC charging modes quickly, safely and reliably, thereby improving the intelligence level of the AC / DC charging pile and enabling it to adapt to different charging requirements and power grid conditions.

Claims

1. A protocol conversion device suitable for large AC / DC charging piles, characterized in that: Including fixed connected miniature circuit breakers and protocol conversion modules, The miniature circuit breaker is internally provided with a microprocessor, a voltage transformer, a current transformer and a humidity sensor, and the voltage transformer, the current transformer and the humidity sensor are all electrically connected to the microprocessor. The miniature circuit breaker is also provided with a dual-mode communication module, an HPLC communication interface and a micro-power wireless communication interface, which are all electrically connected to the microprocessor. The HPLC communication interface and the micro-power wireless communication interface are electrically connected to the dual-mode communication module. The protocol conversion module comprises a protocol conversion chip, an RS485 interface and a CAN interface, all of which are electrically connected to the microprocessor.

2. A protocol conversion device suitable for large AC / DC charging piles according to claim 1, characterized in that: The miniature circuit breaker type is a 2P miniature circuit breaker or a 4P miniature circuit breaker.

3. A protocol conversion device suitable for large AC / DC charging piles according to claim 2, characterized in that: The width of the protocol conversion module is 1.5P.

4. A protocol conversion device suitable for large AC / DC charging piles according to claim 1, characterized in that: The protocol conversion module is provided with a status indicator light and a switching switch which are both electrically connected to the microprocessor.

5. A protocol conversion device suitable for large AC / DC charging piles according to claim 4, characterized in that: The status indicator light is an LED indicator light.

6. A protocol conversion device suitable for large AC / DC charging piles according to claim 1, characterized in that: The RS485 interface and the CAN interface are used for communication connection with the AC / DC charging piles, and the HPLC communication interface and the micro-power wireless communication interface are used for communication connection with the fusion terminal in the area where the AC / DC charging piles are located.

7. A protocol conversion device suitable for large AC / DC charging piles according to claim 1, characterized in that: The miniature circuit breaker is provided with a power connection terminal electrically connected to the microprocessor, and is electrically connected to the power supply of the AC / DC charging pile.

8. An AC / DC charging pile, characterized in that: The protocol converter comprises the protocol converter according to any one of claims 1 to 7, further comprising a power supply electrically connected to the protocol converter, a control unit A for controlling AC charging and a control unit B for controlling DC charging respectively connected to the protocol converter for communication, The control unit A and the control unit B are both electrically connected to a power source, The control unit A is electrically connected to a charging gun A that outputs alternating current, and the control unit B is electrically connected to a charging gun B that outputs alternating current.

9. An AC / DC charging pile according to claim 8, characterized in that: The control unit A, control unit B and power supply are all powered by DC 12V.

10. An AC / DC charging pile according to claim 8, characterized in that: The control unit A and the control unit B are both connected to the RS485 interface and the CAN interface of the protocol conversion device for communication.

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