A DC charger control system with a dual-gun expansion function

Abstract

The present invention discloses a DC charger control system with a dual-gun expansion function, which includes an MCU single-chip microcomputer, a DC power supply module, a remote signal input module, a remote control output module, an auxiliary power supply control module, and a control module. The DC power supply module, the remote signal input module, the remote control output module, the auxiliary power supply control module, and the control module are electrically connected to the MCU single-chip microcomputer, and two groups of the DC power supply modules are provided. The present invention belongs to the technical field of electric vehicle charging piles, and specifically refers to a DC charger control system with a dual-gun expansion function that has a fast control response speed, saves the space of the charging pile, improves production efficiency, and is convenient for later maintenance.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric vehicle charging piles, and specifically refers to a DC charger control system with a dual-gun expansion function. Background Art

[0002] The popularization and application of electric vehicles is an important technical approach for China to build a resource-saving and environment-friendly society, and has become a key development direction for China's low-carbon economy and new energy utilization. The application of electric vehicles will reduce China's dependence on petroleum products, greatly reduce greenhouse gas emissions, and effectively control urban pollution. Since there are significant differences in charging power and charging voltage platform ranges between large vehicles and small vehicles, there are two types of DC chargers on the current market. One is a DC charger for electric passenger cars (with a power of about 20 - 60 kW and a charging voltage platform of about 250V - 500V), and the other is a special charger for electric buses (with a power between 100kW - 450kW and a charging voltage platform of about 400 - 750V). However, the existing DC chargers have a relatively high hardware cost, complex wiring between control modules, and are difficult to maintain. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a DC charger control system with a dual-gun expansion function, which has a fast control response speed, saves charging pile space, improves production efficiency, and is convenient for later maintenance.

[0004] To achieve the above functions, the technical solution adopted by the present invention is as follows: A DC charger control system with a dual-gun expansion function, including an MCU single-chip microcomputer, a DC power supply module, a remote signal input module, a remote control output module, a CAN interface, an RS485(232) interface, an Ethernet interface, an auxiliary power supply control module, and a control module. The DC power supply module, the remote signal input module, the remote control output module, the CAN interface, the RS485(232) interface, the Ethernet interface, the auxiliary power supply control module, and the control module are electrically connected to the MCU single-chip microcomputer. The auxiliary power supply control module supports the switching of auxiliary power supplies of 12V and 24V. The alternating current supplies power to the device through the remote signal input module. The DC power supply module has two groups, and the output power can be dynamically distributed through a bridging switch. The RS485(232) interface has 6 channels, including 1 channel for a 485 electricity meter interface, 1 channel for an RS232 4G module interface (interface reserved), 1 channel for an RS232 touch screen interface, 1 channel for an RS232 card reader interface, 1 channel for an RS232 debugging interface, and 1 channel for an RS232 interface backup. The CAN interface has 3 channels, including two channels for BMS communication and 1 channel for communication with the DC power supply module. The Ethernet interface is used to run the charging pile communication protocol independently developed by the company and communicate with the charging pile cloud platform. The DC charger control system has functions of AC overvoltage, AC undervoltage, DC overvoltage, DC overcurrent, charging gun over-temperature, charging gun over-temperature, and charging pile over-temperature protection.

[0005] Further, the remote signal input module has 12 channels, including access control, emergency stop, lightning protection, A-gun electronic lock signal, B-gun electronic lock signal, A-gun return position, B-gun return position, A-gun output contactor status, B-gun output contactor status, and combined contactor status.

[0006] Further, the remote control output module has 11 channels, including A-gun output contactor control, B-gun output contactor control, combined contactor control, and AC trip control.

[0007] Further, the control module includes electronic lock control, CC voltage measurement, temperature measurement, and insulation detection. The electronic lock control is magnetic control. The CC voltage measurement has two channels. The temperature measurement has 6 channels, including 4 channels for charging gun temperature measurement, 1 channel for air outlet temperature measurement, and 1 channel for internal environment temperature measurement of the pile. The temperature measurement uses an external thermistor, where the external thermistor is NTC 10k, with a B value of 3950 and a 5% accuracy. The insulation detection has two channels, and the maximum measurement voltage is not less than 800V.

[0008] The present invention adopts the above structure and achieves the following beneficial effects: The DC charger control system with a dual-gun expansion function provided by the present invention is simple to operate, has a compact structure, is reasonably designed, and has a relatively low hardware cost, which is about half of the original cost; the relevant control is completed on one board, and the control response speed is faster; the number of control boards is small, saving space for the charging pile; the wiring is less, the integration degree is high, improving production efficiency, reducing production costs, and facilitating later maintenance. The DC charger control system has functions of AC overvoltage, AC undervoltage, DC overvoltage, DC overcurrent, charging gun overheating, charging gun over-temperature, and charging pile over-temperature protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 FIG. is a schematic diagram of the control board of the DC charger control system with a dual-gun expansion function according to the present invention;

[0010] Figure 2 FIG. is a circuit diagram of the DC charger control system with a dual-gun expansion function according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0012] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance. The present invention will be further described in detail below with reference to the accompanying drawings.

[0013] As Figure 1-2As described above, a DC charger control system with a dual-gun expansion function according to the present invention includes an MCU single-chip microcomputer, a DC power supply module, a remote signal input module, a remote control output module, a CAN interface, an RS485(232) interface, an Ethernet interface, an auxiliary power supply control module, and a control module. The DC power supply module, the remote signal input module, the remote control output module, the CAN interface, the RS485(232) interface, the Ethernet interface, the auxiliary power supply control module, and the control module are electrically connected to the MCU single-chip microcomputer. There are two sets of the DC power supply module. The RS485(232) interface has 6 channels, including 1 channel for a 485 electric meter interface, 1 channel for an RS232 4G module interface (interface reserved), 1 channel for an RS232 touch screen interface, 1 channel for an RS232 card reader interface, 1 channel for an RS232 debugging interface, and 1 channel for an RS232 interface spare. The CAN interface has 3 channels, including two channels for BMS communication and 1 channel for communication with the DC power supply module.

[0014] The remote signal input module has 12 channels, including access control, emergency stop, lightning protection, A-gun electronic lock signal, B-gun electronic lock signal, A-gun home position, B-gun home position, A-gun output contactor status, B-gun output contactor status, and combined contactor status.

[0015] The remote control output module has 11 channels, including A-gun output contactor control, B-gun output contactor control, combined contactor control, and AC trip control.

[0016] The control module includes electronic lock control, CC voltage measurement, temperature measurement, and insulation detection. The electronic lock control is magnetic control. The CC voltage measurement has two channels. The temperature measurement has 6 channels, including 4 channels for charging gun temperature measurement, 1 channel for air outlet temperature measurement, and 1 channel for internal environment temperature measurement of the charging pile. The temperature measurement uses external thermistors. The insulation detection has two channels.

[0017] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the spirit of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A DC charger control system with dual-gun expansion function, characterized by: It includes an MCU single-chip microcomputer, a DC power supply module, a remote signal input module, a remote control output module, a CAN interface, an RS485 interface, an RS232 interface, an Ethernet interface, an auxiliary power supply control module, and a control module; The DC power supply module, the remote signal input module, the remote control output module, the CAN interface, the RS485 interface, the RS232 interface, the Ethernet interface, the auxiliary power supply control module, and the control module are electrically connected to the MCU single-chip microcomputer. There are two groups of the DC power supply modules. There are 6 channels for the RS485 interface and the RS232 interface. The 6 channels of the RS485 interface and the RS232 interface include 1 channel for a 485 electricity meter interface, 1 channel for an RS232 4G module interface, 1 channel for an RS232 touch screen interface, 1 channel for an RS232 card reader interface, 1 channel for an RS232 debugging interface, and 1 channel for an RS232 interface backup. There are 3 channels for the CAN interface. The 3 channels of the CAN interface include two channels for BMS communication and 1 channel for communication with the DC power supply module; The Ethernet interface is used for running the charging pile communication protocol and the charging pile cloud platform communication; There are 12 channels for the remote signal input module. The 12 channels of the remote signal input module include access control, emergency stop, lightning protection, A gun electronic lock signal, B gun electronic lock signal, A gun return, B gun return, A gun output contactor status, B gun output contactor status, and combined contactor status; There are 11 channels for the remote control output module. The 11 channels of the remote control output module include A gun output contactor control, B gun output contactor control, combined contactor control, and AC trip control; The control module includes electronic lock control, CC voltage measurement, temperature measurement, and insulation detection. The electronic lock control is magnetic control. There are two channels for the CC voltage measurement. There are 6 channels for the temperature measurement. The 6 channels of the temperature measurement include 4 channels for charging gun temperature measurement, 1 channel for air outlet temperature measurement, and 1 channel for internal pile environment temperature measurement. The temperature measurement uses an external thermistor. There are two channels for the insulation detection; Among them, the auxiliary power supply control module supports the power supply switching between 12V and 24V for the auxiliary power supply. There are two groups of the DC power supply modules, and the output power dynamic distribution is realized through a bridging switch.

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