Solve the problem of traditional double gun DC charging pile

Traditional charging piles have many disadvantages for charging the bus. How can the charging bow use CANWiFi to upgrade the wireless communication and solve the problem of the traditional double-gun DC charging pile?

First, the charging bow works

The charging methods of electric vehicles are mainly divided into AC slow charging and DC fast charging. The existing electric bus charging mainly uses double-gun DC fast charging, that is, the charging pile leads out two charging guns and simultaneously charges the bus. This charging mode has the following disadvantages:

The charging gun is heavy and inconvenient to insert and pull, reducing the user experience;

Need to drag and adjust the charge pile gun head, the charging process is cumbersome.

Figure 1 Traditional charging mode

The traditional charging mode is so tedious. Can it be artificial and let the system complete the matching of the charging process? Thus, the charging bow came into being.

The main purpose of the charging bow is to solve the problem of using the dual-charge gun in the prior art to drag and charge the gun line when charging the bus, causing the problem that the charging user has heavy tasks and poor experience, thereby enhancing the convenience of charging the bus and improving the charging of the bus. Efficiency, improve user charging experience.

Figure 2 Charging process of charging bow and electric bus

The charging bow mainly includes a charger power supply module, a control module, and a first wireless transmission module. The bus mainly includes a BMS battery management system and a second wireless transmission module. The same point of charging with the traditional charging pile is that both of them complete the charging process by establishing a charging handshake configuration between the charger and the BMS, and the difference is that the first wireless communication module of the charging bow and the bus The second wireless communication can be paired for wireless communication to complete the charging configuration, so that the charging bow can be lowered and touch-charging can be performed, and no complicated procedures such as manual intervention and intervention are needed.

Electric vehicle sensors mostly use CAN bus, so the signal transmitted by CAN bus is not compatible with industrial Ethernet signals. In order to wirelessly communicate the signals transmitted in electric vehicles with the signals of the charging bow, CAN to WIFI modules can be used to establish a wireless communication bridge between the two. Realize the establishment of charging pairing, enhance the convenience of bus charging, improve bus charging efficiency, and enhance the user charging experience.

Second, how to achieve the upgrade of charging bow wireless communication?

Charging process of charging bow and electric bus mainly uses CAN to WiFi module.

Figure 3 CANWiFi-200T high performance WiFi to CAN module

ZLG Zhiwei Electronics' CANWiFi-200T is a high-performance industrial-grade WiFi and CAN-bus data conversion device. It integrates 2 CAN-bus interfaces, 1 EtherNet interface and 1 WiFi interface. It comes with a mature and stable With the TCP/IP protocol stack, the user can easily complete the interconnection and intercommunication between the CAN-bus network and the WiFi network, and further expand the scope of the CAN-bus network.

Figure 4 charging bow and electric bus charging pair

Electric car and charging bow built-in CANWiFi-200T converter respectively, can realize the wireless transmission of charging data. During the charging process, the user can view the battery capacity, voltage, current, and other parameters in real time through the screen in the cockpit, and can monitor the charging fault in real time to ensure the safety of charging.

Figure 5 two modes of work

Users can use ZNETCOM configuration software to search for parameters to configure parameters such as device IP, working port, target IP, target port, CAN baud rate, etc. The CANWiFi-200T wireless communication module of charging arch can work in AP mode and can accept bus. As Station mode access, wireless connection is achieved, and each AP can receive up to 8 external devices.

Figure 6 Open the CANWiFi-200T device

Then open the CANTest test software, select the working device, PC work mode, IP and port to start the CAN converter, and establish a normal working environment for the device. In addition, the user can also download the mobile phone terminal APP to view the CANWiFi-200T data sending and receiving situation in real time and understand the charging process in real time.