【Photovoltaic inverter/energy storage/charging pile】

The overall system application composition: photovoltaic inverter, electric vehicle charging pile, concentrator, battery management system (BMS), charging management service platform. The control circuit of the electric vehicle charging pile (bolt) is mainly completed by the embedded ARM processor. Users can swipe the card by themselves to perform functions such as user authentication, balance inquiry, and billing inquiry, and can also provide a voice output interface to realize voice interaction. 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 security reasons, the electricity billing and amount data are securely encrypted.

DC charging pile

Photovoltaic/Energy Storage System

For the specific selection of Aipu power modules, please refer to■

The following is a typical power supply solution for DC charging piles, which simply draws the application of a charger. In practical applications, the power output of a charger of more than ten kilowatts is not enough, and it is often necessary to connect three or so chargers in parallel to meet the requirements of high current output. As shown in Figure 2 below:

2

Power supply instructions

In the power supply part, the auxiliary power supply of the BMS in the case of high current charging needs to be considered first. In the latest national standard, this power supply is uniformly calibrated as a 12V10A power supply, and in the future, in terms of BMS management, the BMS power supply system of passenger cars and buses will be standardized. Therefore, it is recommended to select the FA20-220S12H2 with active PFC function to output 12V to supply power to the BMS system. For the power supply part of the main control system, FA40-220S24W2 is recommended to supply power to the HMI display and relays. Then convert it into 12V and 5V through K7812-500 and K7805-500 to supply power to the monitoring security unit and MCU respectively.

In the communication part, this scheme applies three kinds of communication, CAN communication, 485 communication and 232 communication. CAN communication connects the on-board BMS, off-board charger and main control system; 485 communication connects the card swiping module, electricity meter, etc.; the serial port of the display screen usually adopts the 232 communication method. Based on internal point-to-point communication, sometimes non-isolated communication methods can also be used.

Power Recommendations and Instructions

In the power supply part, the auxiliary power supply of the BMS in the case of high current charging needs to be considered first. In the latest national standard, this power supply is uniformly calibrated as a 12V10A power supply, and in the future, in terms of BMS management, the BMS power supply system of passenger cars and buses will be standardized. Therefore, it is recommended to select the FA20-220S12H2 with active PFC function to output 12V to supply power to the BMS system.

For the power supply part of the main control system, FA40-220S24W2 is recommended to supply power to the HMI display and relays. Then convert it into 12V and 5V through K7812-500 and K7805-500 to supply power to the monitoring security unit and MCU respectively.

In the communication part, this scheme applies three kinds of communication, CAN communication, 485 communication and 232 communication. CAN communication connects the on-board BMS, off-board charger and main control system; 485 communication connects the card swiping module, electricity meter, etc.; the serial port of the display screen usually adopts the 232 communication method. Based on internal point-to-point communication, sometimes non-isolated communication methods can also be used.

Power Recommendations and Instructions

For BYD relay/fuse specific selection, please refer to

EVR series (regular contact) EVRA series (auxiliary contact): hydrogen arc extinguishing ceramic cavity package brazing and laser welding connection, mild high, safe and reliable; DC high voltage platform (12V-1000VDC) main application fields EV, PHEV , High-voltage DC charging piles, battery testing equipment, high-power energy storage systems;

EV series (400VDC) EVRP (12V-600VDC) series: hydrogen arc-extinguishing plastic cavity package is mainly used in A0/A00 electric passenger cars with voltage platforms below 200VDC, low-speed vehicles, home energy storage systems within 400VDC, and DC charging piles on 500VDC platforms and other fields.

The electrical life of the positive and negative connection of the partition/start-stop series is highly consistent, and the reverse connection is more than 90% of the positive connection. More than 90% of the positive connection is used in series, the pull-in/disconnection action is consistent, and the volume is small (minimum thickness 32MM) High space utilization and low power consumption (1.4W), low calorific value and good heat dissipation performance (thermal conductive silica gel).

Automobile fuse series: rated voltage 450V-1000V, rated current 30A-500A, small internal resistance and small temperature rise.