Electric vehicle charging pile belongs to distribution network, power distribution automation system in its communication mode and often considered together, the characteristic of its communication system is by measuring point more and scattered, wide coverage, communication distance is short, with the continuous construction of urban purging electric facilities, the requirements of the network topology has the structure of the flexibility and extensibility,
To this, in the current mainstream WiFi wireless access technology on the basis of realizing the wi-fi rf signal and 2 g/3 g/4 g wireless signals, such as wide distribution, but also achieve the rf switching multiple access points, allocation and power control, so as to set up based on optical carrier wireless technology, communication and network system of electric vehicle charging pile
the following topology for wireless data applications:
Note: if the 3 g/4 g router and charging pile distance far away, you can also add a WiFi repeater (WiFi modules of point-to-point connection and charging pile, extend the transmission distance,
Above the addition of WIFI technology compared with the existing way of communication, electric vehicle charging pile has the following advantages:
(1) the large range of radio frequency signal;
(2) focused on the switches in the radio frequency signal source, realize the unified control and management, high security and reliability of the system;
(3) large capacity of network, wireless network USES WiFi 802.11 a/b/g/n standard, up to 750 MBPS network bandwidth;
(4) equipment installation, convenient maintenance, extension is easy, the price is reasonable;
(5) the light load, the core equipment of wireless switches also has the function of capacity reconstruction under the condition of without changing existing hardware equipment, realize local area communication capacity increase;
(6) to carry out a comprehensive business and function extension, such as providing parking lot vehicle management, the customer's wireless access and other value-added services;
(7) light load wireless switches in the built-in WiFi access point (AP), using standard TCP/IP network protocol, and substation, distribution substation network communication equipment such as seamless connection, in line with the development trend of the future full of IP communication network,