CN112109579A - A DC charging pile control system - Google Patents

Abstract

The invention discloses a DC charging pile control system, comprising an AC input component, a rectifier module component, a DC output component, a human-computer interaction component and a fan component. The AC input component and the rectifier module component are electrically connected through a CAN bus. The AC input component is electrically connected to the fan component, the fan component is electrically connected to the human-machine interaction component, the AC input component is electrically connected to the human-computer interaction component, the rectifier module component is electrically connected to the DC output component, and the human-computer interaction component is electrically connected. The interactive part and the DC output part are electrically connected through the CAN bus. The invention belongs to the technical field of electric vehicle charging piles, and specifically relates to a direct current charging pile control system with fast control response speed, saving charging pile space, improving production efficiency and facilitating later maintenance.

Description

A DC charging pile control system

technical field

The invention belongs to the technical field of electric vehicle charging piles, in particular to a direct current charging pile control system.

Background technique

The popularization and application of electric vehicles is an important technological approach for China to build a resource-saving and environment-friendly society. It has become a key development direction for my country's low-carbon economy and new energy utilization. The application of electric vehicles will reduce China's dependence on petroleum products. Significantly reduce greenhouse gas emissions and effectively control urban pollution, due to the large difference in charging power and charging voltage platform range between large vehicles and small vehicles. There are currently two types of DC chargers on the market, one is a DC charger for electric passenger cars (power is around 20-60kW, and the charging voltage platform is around 250V-500V), and the other is a dedicated charger for electric buses ( The power is between 100kW-450kW, and the charging voltage platform is around 400-750V), but the hardware cost of the existing DC charger is high, the wiring between each control module is more complicated, and the maintenance is more difficult.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention provides a DC charging pile control system with fast control response speed, saving charging pile space, improving production efficiency and facilitating later maintenance.

In order to realize the above functions, the technical solutions adopted in the present invention are as follows: a DC charging pile control system, comprising an AC input component, a rectifier module component, a DC output component, a human-computer interaction component and a fan component, the AC input component and the rectifier module The components are electrically connected through the CAN bus, the AC input component is electrically connected with the fan component, the fan component is electrically connected with the human-computer interaction component, the AC input component is electrically connected with the human-computer interaction component, and the connection is achieved through a 12V power supply, so the The rectifier module component is electrically connected with the DC output component, and the human-computer interaction component is electrically connected with the DC output component through the CAN bus; the AC input component includes a circuit breaker, an AC contactor, a lightning arrester, an AC transformer, a three-phase AC meter, miniature circuit breaker, switching power supply and monitoring module, the lightning protection device is electrically connected to the circuit breaker, the lightning protection device realizes the function of lightning protection, meets the requirements of electric shock protection, the circuit breaker can be compatible, and can be shunt tripping The functional circuit breaker has the functions of short circuit, overvoltage, overcurrent and undervoltage protection to realize input protection, the AC contactor is electrically connected to the circuit breaker, the AC contactor is electrically connected to the miniature circuit breaker through the rectifier module component, and the The AC transformer is electrically connected to the three-phase AC meter, the miniature circuit breaker is electrically connected to the AC transformer and the three-phase AC meter, the AC transformer and the switching power supply are electrically connected to the monitoring module, and the AC input component inputs the AC power, which is rectified through rectification. The module component converts AC to DC, and the AC input component has the function of lightning strike protection, meets the requirements of electric shock protection, and has short circuit, overvoltage, overcurrent and undervoltage protection functions to achieve input protection; the human-computer interaction components include TCU units, A protocol conversion module, a card reader and a control indication module, the protocol conversion module, the card reader and the control module are electrically connected with the TCU unit, and the control indication module includes a liquid crystal touch screen, an emergency stop button and an indicator board, and the read The card reader is an MT628 card reader, the indicator board is used to indicate the use status, and the human-computer interaction component has the functions of card swiping, display, and status indication; the rectifier module component includes a charging module and a DC contactor for power distribution; the DC output Components include DC contactor, shunt, fuse, DC meter, discharge resistance module and charging interface module, the DC contactor is divided into positive output DC contactor and negative output DC contactor, positive output DC contactor and negative electrode The output DC contactor is connected with the charging gun; the fan component is provided with a fan and a fan state monitoring board, and the fan state monitoring board is used to detect the fan state and rotational speed.

Further, the switching power supply includes a switching power supply of 12V/100W, a switching power supply of 24V/150W and a switching power supply of 12V/350W.

Further, the TCU unit is connected to the charging interface module with the CAN bus through the protocol conversion module, the TCU unit is connected to the indicator light board, the monitoring module is electrically connected to the charging interface module through the CAN bus, and the monitoring module is provided with multiple The monitoring module is connected with the fan status detection board through the RS485 bus, the charging module is connected with the monitoring module through the CAN bus, and the reading The card holder and the LCD touch screen are electrically connected to the TCU unit through the RS232 bus, the charging interface module is electrically connected to the discharge resistance module, and the DC meter is electrically connected to the charging module interface and the TCU unit through the RS485 bus.

Further, the TCU unit includes a power supply board and a main board, and the power supply is converted. The TCU unit realizes the conversion from DC24V to the power supply required by each circuit of the module, as well as the relay output interface, the digital input interface, the CAN communication interface and the RS485 communication interface.

Further, the power board includes a power supply, a secondary isolated power supply, an external module and a main isolated power supply, and the power supply is connected to the secondary isolated power supply, the external module and the main isolated power supply.

Further, the motherboard adopts the ARM9 AT9G25 platform, has the operating conditions of the linux system, has 32MB of SRAM storage, 128MB of NANDFLASH, adopts the YAFF2 file system, has the functions of 4G module, Bluetooth, WIFI and other wireless modules, and has a USB interface, which can be Realize U disk file reading, realize upgrade or data export function, have 10/100M adaptive Ethernet interface, can communicate with the master station, use SPI interface MCP2515 to expand 2 CAN ports, use serial port to connect voice chip SYN6588, the said The main board is connected to the LCD touch screen and the card reader through the RS232 interface.

Further, the charging interface module is provided with a CAN interface, a signal detection and control module, a meter reading 484 interface, a debugging RS232 interface, an insulation detection circuit, an output control interface and a digital input interface, and the CAN interface is a CAN communication of a BMS. Interface, 1-way CAN interface connected with TCU, 1-way CAN interface connected with monitoring board, using MCP2515 expansion, the output control interface is provided with 6-way, 6-way relay output control interface, temporarily designed to correspond to contactors respectively Control, auxiliary power control, fan control (backup), and other backups, the switch input interface is provided with 8 channels, and the 8 channel switch input interfaces are temporarily designed for contactor status, electronic lock status, door contact, and emergency stop. , Other reservations, the charging interface module is used for the discharge resistance control output, and the signal detection and control module includes temperature sensing, CC detection and electronic lock control and status.

Further, the monitoring module is provided with a CAN interface, a temperature monitoring circuit in the cabinet, a meter reading 484 interface, a debugging RS232 interface, an output control interface and a digital input interface, and the CAN interface is a CAN communication interface for 2-way module communication, and a charging interface. The 1-channel CAN interface connected by the interface module is extended by MCP2515. The monitoring module is used for bleeder resistance control output and ground wire disconnection detection. The meter reading 484 interface is used for reading the data of the AC input side meter. 6-way, 6-way relay output control interface, temporarily designed to correspond to contactor control, auxiliary power control, fan control (backup), and other backups. The designs are contactor state, electronic lock state, door contact, emergency stop, and other reservations.

The present invention adopts the above structure to achieve the following beneficial effects: the DC charging pile control system provided by the present invention is simple in operation, compact in structure and reasonable in design, the AC input component realizes the function of a three-phase AC power distribution input interface, and has short-circuit protection, lightning protection, Power cutoff, AC circuit measurement, auxiliary power supply and other functions, the rectifier module components realize the installation and power supply of the rectifier charging module, module power output and distribution, and the DC output components realize the output of the DC power line to the charging gun, and have the corresponding charging gun connection and BMS interaction, charging control, DC output metering, insulation detection, capacitor voltage discharge and other functions, human-computer interaction components realize human-computer interaction functions, including display, indication, emergency stop, card swiping, uplink communication and other functions. Installation and power supply interface, detection output of fan status and other functions.

Description of drawings

1 is an overall block diagram of a DC integrated machine of a DC charging pile control system of the present invention;

2 is a block diagram of a DC split of a DC charging pile control system of the present invention;

3 is a schematic diagram of a hardware connection of a DC charging pile control system of the present invention;

4 is a schematic connection diagram of a power supply board of a DC charging pile control system of the present invention;

FIG. 5 is a schematic connection diagram of a main board of a DC charging pile control system of the present invention;

6 is a schematic connection diagram of a charging interface module of a DC charging pile control system of the present invention;

FIG. 7 is a schematic connection diagram of a monitoring module of a DC charging pile control system according to the present invention;

FIG. 8 is a schematic diagram of a software platform of a DC charging pile control system of the present invention.

Detailed ways

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 a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1-8, a DC charging pile control system of the present invention includes an AC input component, a rectifier module component, a DC output component, a human-computer interaction component and a fan component. The AC input component and the rectifier module component pass through CAN The bus is electrically connected, the AC input component is electrically connected to the fan component, the fan component is electrically connected to the human-computer interaction component, the AC input component is electrically connected to the human-computer interaction component, and the rectifier module component is electrically connected to the DC output component. The human-computer interaction component is electrically connected with the DC output component through the CAN bus; the AC input component includes circuit breakers, AC contactors, lightning arresters, AC transformers, three-phase AC meters, miniature circuit breakers, switching power supplies and monitoring module, the lightning arrester is electrically connected to the circuit breaker, the AC contactor is electrically connected to the circuit breaker, the AC contactor is electrically connected to the miniature circuit breaker through the rectifier module component, the AC transformer is connected to the three-phase circuit breaker. The AC meter is electrically connected, the miniature circuit breaker is electrically connected with the AC transformer and the three-phase AC meter, and the AC transformer and the switching power supply are electrically connected with the monitoring module; the human-computer interaction component includes a TCU unit, a protocol conversion module, A card reader and a control indication module, the protocol conversion module, the card reader and the control module are electrically connected with the TCU unit, the control indication module includes a liquid crystal touch screen, an emergency stop button and an indicator board, and the card reader is MT628 a card reader; the rectifier module component includes a charging module and a DC contactor for power distribution; the DC output component includes a DC contactor, a shunt, a fuse, a DC meter, a bleeder resistor module and a charging interface module, the The DC contactor is divided into a positive output DC contactor and a negative output DC contactor; a fan and a fan state monitoring board are arranged in the fan component.

The switching power supply includes a switching power supply of 12V/100W, a switching power supply of 24V/150W and a switching power supply of 12V/350W.

The charging interface module is provided with a CAN interface, a signal detection and control module, a meter reading 484 interface, a debugging RS232 interface, an insulation detection circuit, an output control interface and a digital input interface, and the output control interface is provided with 6 channels. The digital input interface is provided with 8 channels, and the signal detection and control module includes temperature sensing, CC detection and electronic lock control and status.

The monitoring module is provided with a CAN interface, a temperature monitoring circuit in the cabinet, a meter reading 484 interface, a debugging RS232 interface, an output control interface and a digital input interface. The output control interface is provided with 6 channels, and the digital input interface is provided with There are 8 routes.

The TCU unit is connected to the charging interface module through the CAN bus through the protocol conversion module, the TCU unit is connected to the indicator board, the monitoring module is electrically connected to the charging interface module through the CAN bus, and the monitoring module is connected to the fan through the RS485 bus. The state detection board is connected, the charging module is connected to the monitoring module through the CAN bus, the card reader and the liquid crystal touch screen are electrically connected to the TCU unit through the RS232 bus, the charging interface module is electrically connected to the bleeder resistance module, the direct current The meter is electrically connected with the charging module interface and the TCU unit through the RS485 bus.

The TCU unit includes a power board and a main board.

The power board includes a power supply, a secondary isolated power supply, an external module and a main isolated power supply, and the power supply is connected to the secondary isolated power supply, the external module and the main isolated power supply.

The main board adopts the ARM9 AT9G25 platform, and the main board is connected to the LCD touch screen and the card reader through the RS232 interface.

In specific use, the AC input component realizes the function of three-phase AC power distribution input interface, and has the functions of short-circuit protection, lightning protection, power cutoff, AC circuit metering, auxiliary power supply, etc. The rectifier module component realizes the installation and power supply of the rectifier charging module, and the Output and distribution, the DC output component realizes the output of the DC power line to the charging gun, and has the corresponding charging gun connection and BMS interaction, charging control, DC output measurement, insulation detection, capacitor voltage discharge and other functions. Machine interaction functions, including display, indication, emergency stop, card swiping, uplink communication and other functions, fan components have fan installation and power supply interfaces, fan status detection output and other functions.

The present invention and its embodiments have been described above, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it, and without departing from the purpose of the present invention, any structural modes and embodiments similar to this technical solution are designed without creativity, all should belong to the protection scope of the present invention.

Claims (8)

1. A DC charging pile control system, characterized in that: comprising an AC input part, a rectifier module part, a DC output part, a man-machine interaction part and a fan part, the AC input part and the rectifier module part are electrically connected through a CAN bus, The AC input component is electrically connected to the fan component, the fan component is electrically connected to the human-machine interaction component, the AC input component is electrically connected to the human-computer interaction component, the rectifier module component is electrically connected to the DC output component, and the The human-computer interaction component and the DC output component are electrically connected through the CAN bus; the AC input component includes a circuit breaker, an AC contactor, a lightning protection device, an AC transformer, a three-phase AC meter, a miniature circuit breaker, a switching power supply and a monitoring module, The lightning arrester is electrically connected to the circuit breaker, the AC contactor is electrically connected to the circuit breaker, the AC contactor is electrically connected to the miniature circuit breaker through the rectifier module component, and the AC transformer is electrically connected to the three-phase AC meter , the miniature circuit breaker is electrically connected with the AC transformer and the three-phase AC meter, and the AC transformer and the switching power supply are electrically connected with the monitoring module; the human-computer interaction component includes a TCU unit, a protocol conversion module, a card reader and a control indication module, the protocol conversion module, the card reader and the control module are electrically connected with the TCU unit, the control indication module includes a liquid crystal touch screen, an emergency stop button and an indicator board, and the card reader is an MT628 card reader; The rectifier module component includes a charging module and a DC contactor for power distribution; the DC output component includes a DC contactor, a shunt, a fuse, a DC meter, a bleeder resistance module and a charging interface module, and the DC contactor is divided into two parts. It is a positive output DC contactor and a negative output DC contactor; the fan component is provided with a fan and a fan state monitoring board. 2 . The DC charging pile control system according to claim 1 , wherein the switching power supply comprises a switching power supply of 12V/100W, a switching power supply of 24V/150W and a switching power supply of 12V/350W. 3 . 3. A DC charging pile control system according to claim 1, characterized in that: the charging interface module is provided with a CAN interface, a signal detection and control module, a meter reading 484 interface, a debugging RS232 interface, an insulation detection circuit, Output control interface and digital input interface, the output control interface is provided with 6 channels, the digital input interface is provided with 8 channels, the signal detection and control module includes temperature sensing, CC detection and electronic lock control and status . 4. A DC charging pile control system according to claim 1, characterized in that: the monitoring module is provided with a CAN interface, a temperature monitoring circuit in the cabinet, a meter reading 484 interface, a debugging RS232 interface, an output control interface and a switch The output control interface is provided with 6 channels, and the switch input interface is provided with 8 channels. 5. A DC charging pile control system according to claim 1, characterized in that: the TCU unit is connected to the charging interface module by a CAN bus through a protocol conversion module, the TCU unit is connected to an indicator board, and the The monitoring module is electrically connected with the charging interface module through the CAN bus, the monitoring module is connected with the fan state detection board through the RS485 bus, the charging module is connected with the monitoring module through the CAN bus, and the card reader and the LCD touch screen are connected with the RS232 bus. The TCU unit is electrically connected, the charging interface module is electrically connected to the bleeder resistance module, and the direct current meter is electrically connected to the charging module interface and the TCU unit through the RS485 bus. 6 . The DC charging pile control system according to claim 5 , wherein the TCU unit comprises a power board and a main board. 7 . 7. A DC charging pile control system according to claim 6, wherein the power board comprises a power supply, a secondary isolated power supply, an external module and a main isolated power supply, the power supply and the secondary isolated power supply, an external The module is connected to the main isolated power supply. 8 . The DC charging pile control system according to claim 7 , wherein the main board adopts an ARM9AT9G25 platform, and the main board is connected to a liquid crystal touch screen and a card reader through an RS232 interface. 9 .

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