Ordered charging control system and method based on master-slave RS485 communication

Abstract

The invention discloses an ordered charging control system and method based on master-slave RS485 communication, and belongs to the technical field of ordered charging control. The system comprises a master device and a plurality of slave devices. The main device is connected with a gateway electricity meter in a station and collects an active power value in the station in real time. The master device is connected with the plurality of slave devices through an RS485 communication network; the master device is configured with a master device address, a slave device address range and a station output power threshold; and the slave equipment is configured with an equipment address. The method comprises the steps that a master device collects the total active power of a station and operation data of each slave device in real time; the master device determines the output power of each slave device based on a station output power threshold preset in advance in combination with the total active power and the operation data of each slave device; and the master device transmits the determined output power of each slave device to the corresponding slave device through an RS485 communication network. According to the invention, additional ordered charging equipment is prevented from being added to each charging station.

Description

Technical Field

[0001] The invention belongs to the technical field of orderly charging control, and relates to an orderly charging control system and method based on master-slave RS485 communication. Background Art

[0002] With the increasing global awareness of environmental protection and the transformation of energy structure, the new energy vehicle industry has ushered in unprecedented development opportunities, especially in the field of electric vehicles, whose penetration rate is growing at an unprecedented rate. This trend not only promotes the innovation of automobile manufacturing technology, but also puts higher requirements on the construction of public and private charging infrastructure. With the surge in the number of electric vehicles, the demand for charging facilities is becoming increasingly urgent. Both public charging stations in city centers and private charging piles in residential areas are facing huge construction pressure.

[0003] However, in the process of promoting the construction of charging facilities, a technical problem that cannot be ignored has gradually surfaced. Since the newly added charging piles need to be connected to the existing power network, they often need to share the load with the existing transformers. But the capacity of the power grid is limited. Directly increasing the number of charging piles without any adjustment can easily put the transformer into an overload dilemma. This will not only seriously affect the stability and safety of power supply, but may also cause frequent power grid failures, bringing great inconvenience to people's daily life and industrial production. What is more serious is that the traditional charging method lacks intelligent management and adjustment mechanisms, and cannot dynamically adjust the output power of the charging pile according to the real-time load of the power grid. This means that during the peak load period of the power grid, the charging pile may continue to charge at maximum power, further aggravating the burden on the power grid. During the low load period of the power grid, the charging pile may cause energy waste due to excessive output power. This unreasonable charging method not only increases the operation risk of the power grid, but also reduces the efficiency of energy utilization. Therefore, how to achieve orderly charging based on the existing transformer has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problem of the lack of a control method for realizing orderly charging based on the existing transformer in the prior art, and to provide an orderly charging control system and method based on master-slave RS485 communication.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention provides an orderly charging control system based on master-slave RS485 communication, comprising a master device and several slave devices; the master device is connected to a gateway meter in a station to collect the active power value in the station in real time; the master device is connected to several slave devices through an RS485 communication network; the master device is configured with a master device address, a slave device address range and a station output power threshold; the slave device is configured with a local device address.

[0006] Further improvements are: When adding the slave device, the slave device is matched with a unique address and connected to the RS485 communication network, and the master device automatically identifies and manages it.

[0007] The slave device is provided with a low-power standby mode to reduce energy consumption during non-charging periods; and enters a working state when the slave device receives an instruction from the master device.

[0008] The master device is a charging pile in the station, and the slave devices are the remaining charging piles in the station.

[0009] The main device is configured with an automatic triggering anti-overload protection program and an alarm program; when the total active power of the station reaches a preset station output power threshold, the automatic triggering anti-overload protection program is triggered.

[0010] The master device is configured with a master device address, a slave device address range and a station output power threshold, specifically: The parameter configuration is completed through the local interface of the master device, the remote management platform or the dedicated configuration tool; the slave device is configured with the local device address and the parameter configuration is completed through the local interface of the slave device, the remote management platform or the dedicated configuration tool.

[0011] In a second aspect, the present invention provides an orderly charging control method based on the master-slave RS485 communication based on the above system, comprising: The master device collects the total active power of the station and the operating data of each slave device in real time; The master device determines the output power of each slave device based on the preset site output power threshold and in combination with the total active power and the operation data of each slave device; The master device transmits the determined output power of each slave device to the corresponding slave device via the RS485 communication network.

[0012] The operation data of the slave device includes current output power, charging status and error code.

[0013] When the master device detects that the total active power of the station reaches the preset station output power threshold, the master device automatically triggers the overload protection program to prevent the transformer from overloading by reducing or limiting the output power of some or all slave devices.

[0014] When the main device detects a device failure, a communication failure, or the automatic overload protection program is triggered, the alarm program is started and an alarm message is sent to the administrator.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses an orderly charging control system based on RS485 communication between master and slave. Through the direct connection between the master device and the gateway electric meter in the station, the system can collect the active power value in the station in real time and accurately, and provide accurate data support for subsequent charging control. At the same time, the master device efficiently transmits data with multiple slave devices through the RS485 communication network, ensuring the real-time and accuracy of the information. The system adopts the configuration mode of the master device address, the slave device address range and the station output power threshold, so that the system can flexibly adapt to charging scenarios of different scales and needs. The master device can identify and manage multiple slave devices, ensuring that each slave device can be charged in an orderly manner according to predetermined rules, avoiding confusion and conflict in the charging process. Based on the real-time collected station active power value and the preset output power threshold, the system can intelligently adjust the charging power of each slave device to achieve orderly charging. This can not only effectively avoid station overload, but also optimize charging efficiency, extend battery life, and reduce the charging cost of users. The RS485 communication network has the advantages of strong anti-interference ability, long transmission distance, and a large number of nodes, so that the system can maintain high reliability and stability in a complex and changeable charging environment. At the same time, the master-slave design also enhances the fault tolerance of the system. Even if a slave device fails, it will not affect the normal operation of the entire system. The master-slave structure of the system makes it easy and convenient to add or remove slave devices without making large-scale changes to the system. In addition, through simple configuration adjustments, the system can adapt to charging equipment of different brands and models, reducing the maintenance cost of the system. In summary, by adopting the master-slave communication method between charging piles to achieve orderly charging, it is avoided that additional orderly charging equipment is added to each charging station, thereby greatly reducing the construction and maintenance costs. Dynamically adjusting the output power of the charging piles in the station can effectively prevent transformer overload, protect the power infrastructure from damage, and ensure the stable operation of the power grid. RS485 communication technology allows the charging piles to self-adjust according to the real-time load conditions, enhances the response speed and flexibility of the system, and enables the charging station to manage power resources more effectively. Due to the reduction in the installation of additional equipment, the workload of daily maintenance is also reduced, further saving operating costs.

[0016] The present invention discloses an orderly charging control method based on RS485 communication between master and slave. Through the real-time acquisition of the total active power of the station and the operation data of each slave device by the master device, the system can grasp the charging load of the station and the working status of each charging pile in real time. Combined with the preset output power threshold of the station, the system can quickly and accurately calculate the output power to be allocated to each slave device, thereby realizing real-time and precise control of the charging process. The method dynamically adjusts the output power of each charging pile according to the total active power of the station and the actual needs of each slave device through an intelligent algorithm. This can not only ensure that the total output power of the station does not exceed the preset threshold value and prevent the overload of the power grid, but also optimize the distribution and utilization of energy while ensuring the charging efficiency, and reduce energy waste. By real-time monitoring and controlling the output power of each charging pile, the system can timely discover and deal with potential safety hazards such as overload and short circuit, and ensure the safety and stability of the charging process. At the same time, the method also supports fault self-diagnosis and remote monitoring functions, further improving the safety and reliability of the charging system. The method adopts the master-slave RS485 communication architecture, making the system easy to expand and maintain. When adding a new charging pile, you only need to connect it to the RS485 communication network and configure the corresponding address to achieve communication and control with the main device. In addition, the system configuration and parameter adjustment can also be completed through remote operation, reducing maintenance costs and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a flow chart of an orderly charging control method based on RS485 communication between master and slave machines in the present invention; Figure 2 It is a control block diagram of an orderly charging control system based on RS485 communication between master and slave machines in the present invention; Figure 3 The present invention is a communication flow chart of a master device and a slave device in an orderly charging control system based on master-slave RS485 communication. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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 part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings: See also Figure 2 and Figure 3 The embodiment of the present invention discloses an orderly charging control system based on RS485 communication between master and slave, including a master device and several slave devices; the master device is connected to the gateway meter in the station to collect the active power value in the station in real time; the master device is connected to several slave devices through the RS485 communication network; the AC meter in the new energy charging station is directly connected to the master device, and the master device and the slave devices are connected hand in hand. Figure 2 As shown, the status of the shampoo cream is obtained: the master device periodically sends a read status data frame to the slave device within the configured slave address range. The slave device sends a reply status data frame after receiving a command with the same address as the local device. Power setting: The master device calculates the output power of each slave device in the station according to the control strategy, and sends a setting output power frame to the slave device. When the slave device receives a command consistent with the local address, it adjusts the output power and sends a setting power reply frame to the master device.

[0023] The master device is configured with a master device address, a slave device address range and a station output power threshold; the slave device is configured with its own device address. Parameter configuration is completed through the master device's local interface, remote management platform or dedicated configuration tool; the slave device is configured with its own device address and parameter configuration is completed through the slave device's local interface, remote management platform or dedicated configuration tool. When the slave device is added, the slave device is matched with a unique address and connected to the RS485 communication network, and the master device automatically identifies and manages it. The slave device is provided with a low-power standby mode to reduce energy consumption during non-charging periods; it enters a working state when the slave device receives a command from the master device. The master device is a charging pile in the station, and the slave device is the remaining charging pile in the station. The master device is configured with an automatic triggering anti-overload protection program and an alarm program; when the total active power of the station reaches the preset station output power threshold, the automatic triggering anti-overload protection program is triggered.

[0024] The present invention discloses an orderly charging control system based on RS485 communication between master and slave. Through the direct connection between the master device and the gateway electric meter in the station, the system can collect the active power value in the station in real time and accurately, and provide accurate data support for subsequent charging control. At the same time, the master device efficiently transmits data with multiple slave devices through the RS485 communication network, ensuring the real-time and accuracy of the information. The system adopts the configuration mode of the master device address, the slave device address range and the station output power threshold, so that the system can flexibly adapt to charging scenarios of different scales and needs. The master device can identify and manage multiple slave devices, ensuring that each slave device can be charged in an orderly manner according to predetermined rules, avoiding confusion and conflict in the charging process. Based on the real-time collected station active power value and the preset output power threshold, the system can intelligently adjust the charging power of each slave device to achieve orderly charging. This can not only effectively avoid station overload, but also optimize charging efficiency, extend battery life, and reduce the charging cost of users. The RS485 communication network has the advantages of strong anti-interference ability, long transmission distance, and a large number of nodes, so that the system can maintain high reliability and stability in a complex and changeable charging environment. At the same time, the master-slave design also enhances the fault tolerance of the system. Even if a slave device fails, it will not affect the normal operation of the entire system. The master-slave structure of the system makes it easy and convenient to add or remove slave devices without making large-scale changes to the system. In addition, through simple configuration adjustments, the system can adapt to charging equipment of different brands and models, reducing the maintenance cost of the system. In summary, by adopting the master-slave communication method between charging piles to achieve orderly charging, it is avoided that additional orderly charging equipment is added to each charging station, thereby greatly reducing the construction and maintenance costs. Dynamically adjusting the output power of the charging piles in the station can effectively prevent transformer overload, protect the power infrastructure from damage, and ensure the stable operation of the power grid. RS485 communication technology allows the charging piles to self-adjust according to the real-time load conditions, enhances the response speed and flexibility of the system, and enables the charging station to manage power resources more effectively. Due to the reduction in the installation of additional equipment, the workload of daily maintenance is also reduced, further saving operating costs.

[0025] join Figure 1 The embodiment of the present invention discloses an orderly charging control method based on master-slave RS485 communication, comprising: S1, the master device collects the total active power of the station and the operating data of each slave device in real time; The operation data of the slave device includes current output power, charging status and error code.

[0026] S2, the master device determines the output power of each slave device based on the preset site output power threshold and in combination with the total active power and the operation data of each slave device; S3, the master device transmits the determined output power of each slave device to the corresponding slave device through the RS485 communication network.

[0027] When the master device detects that the total active power of the station reaches the preset station output power threshold, the master device triggers the automatic overload protection program to prevent transformer overload by reducing or limiting the output power of some or all slave devices. When the master device detects equipment failure, communication failure, or the automatic overload protection program is triggered, the alarm program is started and an alarm message is sent to the administrator.

[0028] The present invention discloses an orderly charging control method based on RS485 communication between master and slave. Through the real-time acquisition of the total active power of the station and the operation data of each slave device by the master device, the system can grasp the charging load of the station and the working status of each charging pile in real time. Combined with the preset output power threshold of the station, the system can quickly and accurately calculate the output power to be allocated to each slave device, thereby realizing real-time and precise control of the charging process. The method dynamically adjusts the output power of each charging pile according to the total active power of the station and the actual needs of each slave device through an intelligent algorithm. This can not only ensure that the total output power of the station does not exceed the preset threshold value and prevent the overload of the power grid, but also optimize the distribution and utilization of energy while ensuring the charging efficiency, and reduce energy waste. By real-time monitoring and controlling the output power of each charging pile, the system can timely discover and deal with potential safety hazards such as overload and short circuit, and ensure the safety and stability of the charging process. At the same time, the method also supports fault self-diagnosis and remote monitoring functions, further improving the safety and reliability of the charging system. The method adopts the master-slave RS485 communication architecture, making the system easy to expand and maintain. When adding a new charging pile, you only need to connect it to the RS485 communication network and configure the corresponding address to achieve communication and control with the main device. In addition, the system configuration and parameter adjustment can also be completed through remote operation, reducing maintenance costs and time.

[0029] The working process of the present invention is as follows: (1) System networking: The charging pile equipment in the station is connected hand in hand using RS485 communication cables, and the AC meter communication cable is connected to the main equipment.

[0030] (2) Parameter configuration: Set the parameters of the master and slave devices in the station. The master device needs to set the local address, slave address range, and station output power threshold; the slave device only needs to set the local address.

[0031] (3) System operation: After the parameter configuration is completed, the system operates normally, and the main equipment can dynamically adjust the output power of the charging equipment in the station to prevent the transformer from overloading.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An orderly charging control system based on master-slave RS485 communication, characterized in that: It includes a master device and several slave devices; the master device is connected to the gateway electric meter in the station to collect the active power value in the station in real time; the master device is connected to several slave devices through the RS485 communication network; the master device is configured with a master device address, a slave device address range and a station output power threshold; the slave device is configured with its own device address.

2. The orderly charging control system based on master-slave RS485 communication according to claim 1 is characterized in that: When adding the slave device, the slave device is matched with a unique address and connected to the RS485 communication network, and the master device automatically identifies and manages it.

3. The orderly charging control system based on master-slave RS485 communication according to claim 1 is characterized in that: The slave device is provided with a low-power standby mode to reduce energy consumption during non-charging periods; and enters a working state when the slave device receives an instruction from the master device.

4. The orderly charging control system based on master-slave RS485 communication according to claim 1 is characterized in that: The master device is a charging pile in the station, and the slave devices are the remaining charging piles in the station.

5. The orderly charging control system based on master-slave RS485 communication according to claim 1 is characterized in that: The main device is configured with an automatic triggering anti-overload protection program and an alarm program; when the total active power of the station reaches a preset station output power threshold, the automatic triggering anti-overload protection program is triggered.

6. The orderly charging control system based on master-slave RS485 communication according to claim 1 is characterized in that: The master device is configured with a master device address, a slave device address range and a station output power threshold, specifically: The parameter configuration is completed through the local interface of the master device, the remote management platform or the dedicated configuration tool; the slave device is configured with the local device address and the parameter configuration is completed through the local interface of the slave device, the remote management platform or the dedicated configuration tool.

7. An orderly charging control method based on master-slave RS485 communication based on the system according to any one of claims 1 to 6, characterized in that: include: The master device collects the total active power of the station and the operating data of each slave device in real time; The master device determines the output power of each slave device based on the preset site output power threshold and in combination with the total active power and the operation data of each slave device; The master device transmits the determined output power of each slave device to the corresponding slave device via the RS485 communication network.

8. The orderly charging control method based on master-slave RS485 communication according to claim 7 is characterized in that: The operation data of the slave device includes current output power, charging status and error code.

9. The orderly charging control method based on master-slave RS485 communication according to claim 7 is characterized in that: When the master device detects that the total active power of the station reaches the preset station output power threshold, the master device automatically triggers the overload protection program to prevent the transformer from overloading by reducing or limiting the output power of some or all slave devices.

10. The orderly charging control method based on master-slave RS485 communication according to claim 9 is characterized in that: When the main device detects a device failure, a communication failure, or the automatic overload protection program is triggered, the alarm program is started and an alarm message is sent to the administrator.

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