With the development of the times and social progress, as people's living standards continue to improve, environmental protection has become the first. Therefore, various new energy electric vehicles emerge as the times require, without exhaust emissions. It can be said that it is green traffic, but it also needs to be recharged. Therefore, the charging pile of electric vehicles came into being. Next, let's introduce what is an electric vehicle charging pile.
The function of the charging pile is similar to the fuel dispenser in the gas station, which can be fixed on the ground or wall, installed in public buildings (public buildings, shopping centers, public parking lots, etc.) and residential parking lots or charging stations, and can charge various types of electric vehicles according to different voltage levels. The input end of the charging pile is directly connected with the AC power grid, and the output end is equipped with a charging plug to charge the electric vehicle. The charging pile generally provides two charging modes: conventional charging and fast charging. People can use a specific charging card on the human-computer interaction interface provided by the charging pile to print the corresponding charging mode, charging time, cost data, etc. The charging pile display screen can display data such as charging amount, cost and charging time.
Battery charging equipment is one of the indispensable subsystems of electric vehicles. Its function is to convert the electric energy of the grid into the electric energy of the electric vehicle battery. Electric vehicle charging devices have different classification methods, which can be generally divided into on-board charging devices and off board charging devices. Charging pile on-board charging device refers to the device installed on the ground AC power grid and on-board power charging pool set of electric vehicles, including on-board charger, on-board charging generator set and operating energy recovery charging device. Plug the AC power cable directly into the electric vehicle charging socket to charge the battery. On board charging device usually adopts contact charger or inductive charger with simple structure and convenient control. It is completely designed according to the type of vehicle battery, with strong pertinence. Off board charging device, i.e. ground charging device, mainly includes special charger, special charging station, general charger, charging station in public places, etc. It can meet various charging modes of various batteries. Generally, the off board charger has large power, volume and weight to adapt to various charging methods.
As a green means of transportation with broad development prospects, electric vehicles will be popularized very quickly in the future, and the future market prospects will be very huge. In the context of the serious global energy crisis and environmental crisis, the Chinese government has actively promoted the application and development of new energy vehicles. As an important supporting infrastructure necessary for the development of electric vehicles, the charging/exchanging power station has very important social and economic benefits. The construction of electric vehicle charging/exchanging power station has been started nationwide.
The control circuit of the electric vehicle charging pile is mainly that after the embedded ARM processor is completed, the user can self swipe the card for user identification, balance query, charge query and other functions, and can also provide voice output interface to achieve voice interaction. The user can select four charging methods according to the indication of the LCD screen: charging on time, charging according to the quantity of electricity, automatic charging, charging according to the mileage, etc.
The electric vehicle charger controller and concentrator use CAN bus for data interaction, and the concentrator and server platform use wired Internet or wireless Internet GPRS network for data interaction. For security, the electricity billing and amount data are encrypted securely.
The main function of the battery management system (BMS) is to monitor the working state of the battery (battery voltage, current and temperature), predict the battery capacity (SOC) of the power battery and the corresponding remaining driving mileage, manage the battery, avoid over discharge, over charge, overheating and serious imbalance between individual batteries, and maximize the use of the battery's storage capacity and cycle life.
The charging service management platform mainly has three functions: charging management, charging operation and comprehensive query. Basic data involved in the charging management centralized management system, such as electric vehicle information, battery information, user card information, and charging pile information; Charging operation mainly manages user charging; Comprehensive query refers to the comprehensive analysis and query of management and operation data.