With the rapid development of industrial tablet technology, electric vehicles are close to or even better than traditional fuel vehicles in terms of performance and economy, and have been rapidly promoted and applied around the world in recent years. Clean, environmentally friendly and energy-saving electric vehicles have been It has become a hot spot and an inevitable trend in the development of the world automobile industry. The charging system provides energy supply for the operation of electric vehicles. It is an important basic support system for electric vehicles and an important link in the commercialization and industrialization of electric vehicles. Electric vehicle chargers are a necessary means of battery charging, and their performance and process complexity directly affect the service life of batteries and the promotion of electric vehicles. Network", the construction of electric vehicle charging stations (piles) is rapidly spreading around the world.
System Requirements
1. Most of the electric vehicle charging stations are built beside the outdoor road, and the environmental characteristics of high temperature, dust and humidity need to be considered, and the environmental adaptability is strong.
2. The number of electric vehicle charging station outlets is generally large and scattered, and the maintenance cost is high, so the product is required to have a high average trouble-free operation time.
3. Provide outdoor users and operators with a visual interface in the outdoors, with a wide viewing angle.
4. With FLASH or CF card storage medium, it can install the operating system and store advertising content.
5. It can realize the operation of the charging terminal of the car owner's free team, which requires a touch panel with high brightness.
6. It can be flexibly connected to card readers, printers, electricity meters and other equipment, requiring the product to have multiple serial ports and CAN communication
System specification
This system is mainly composed of four parts: electric vehicle charging pile, concentrator, battery management system (BMS), and charging management service platform. Among them, the terminal controller of the electric vehicle charging pile is mainly completed by the 10.1-inch measurement and control integrated machine PPC-1012 of the RISC platform. Voice output interface for voice interaction. Users can choose 4 charging modes according to the instructions on the LCD screen: charging by time, charging by electricity, automatic charging, charging by mileage, etc.
The electric vehicle charger controller and the concentrator use the CAN bus for data exchange, and the concentrator and the server platform use the wired Internet or wireless GPRS network for data exchange. For the sake of safety, the electricity billing and amount data are securely encrypted.
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 mileage, and manage the lithium battery to avoid overshooting. Discharge, overcharge, overheating and severe voltage imbalance between cells, maximize the use of lithium battery storage capacity and cycle life.
The charging service management platform mainly has three functions: charging management, charging operation, and comprehensive query. Charging management centrally manages the basic data involved in the system, such as electric vehicle information, lithium battery information, user card information, and charging pile information; charging operation mainly performs billing management for user charging; comprehensive query refers to the management and operation information. Data for comprehensive analysis and query.
System Block Diagram
EVOC product advantages
High-performance Cortex A8 architecture. Multi-embedded system supports Linux 2.6, Android 2.3, Wince7.0
All industrial-grade devices and components are used. The whole machine has the characteristics of high anti-vibration, dust-proof and low calorific value, which is suitable for harsh industrial environment applications.
10.1-inch high-brightness display (1024*600).
Resistive touch screen, all-metal structure to meet industrial needs.
The main communication interface adopts isolation design (serial port, CAN), the network port is lightning-proof, the EMI of the whole machine reaches A level, and the EMS reaches level 2. Multiple charging piles can be cascaded together through the RS-485 interface, and the server can control each self-service charging terminal through Ethernet.
Comes with two CAN interfaces, meeting the CAN2.0 standard.
Support optional WIFI, 3G communication.
Support 9~30V wide voltage input, optional isolated power supply.
Built-in RTC and watchdog.
7. Conclusion
In this industrial tablet computer electric vehicle charging station terminal control system, PPC-1012 can better realize the charging control of electric vehicle batteries due to its high integration of functions and high reliability of performance, and can quickly and conveniently realize on-site charging control. It can collect various charging parameters on site in real time, display them on the local touch screen accurately and conveniently, and manage the data.
