Ev charging piles belong to the distribution network, and their communication mode is often considered together with distribution network automation. Communication is a key and difficult point in distribution network automation. Different regions and conditions lead to different communication modes. Specifically, electric vehicle charging piles mainly have wireless and wired communication modes:
Wireless mode mainly uses mobile data access services of mobile operators, such as GRPS, EVDO, CDMA, etc.
The wired mode mainly includes wired Ethernet (RJ45 cable, optical fiber), industrial serial bus (RS485, RS232, CAN bus).
The main advantages of wired Ethernet are reliable data transmission and large network capacity, while the disadvantages are complex wiring, poor expansibility, high construction cost and poor flexibility.
Industrial serial bus (RS485, RS232, CAN bus) has the advantages of reliable data transmission and simple design, but its disadvantages are complex network layout, poor expansibility, high construction cost, poor flexibility and low communication capacity.