Introduction to PCB board (printed circuit board) of DC charging...
What is the charging module?
The charging module of DC charging pile is its core component, which is mainly responsible for rectifying and filtering the input alternating current, boosting and regulating the voltage (control, conversion) and other functions. Its performance directly affects the overall charging efficiency and charging safety of DC charging equipment. The following are some key technologies of DC charging pile charging module.
The power loop of the DC charging module consists of AC/DC and DC/DC. The AC/DC part is connected to the grid side for rectification and power factor correction; The DC/DC part outputs adjustable DC voltage to meet the charging requirements of different types of batteries.
Core technology
Core technology includes power electronic power conversion circuit, topology technology innovation ability, reliability of embedded software real-time control algorithm, security of circuit design, structure design ability of high power heat dissipation technology and integration ability of high power density .
Topology
In the typical unidirectional DC charging module topology, the AC/DC part adopts three-phase Vienna PFC, which can effectively reduce the voltage stress of power devices, have higher switching frequency, effectively reduce the volume of magnetic devices, and improve the power density of the system. The DC/DC part adopts the LLC topology of primary edge in series and secondary edge in interlace and parallel, which can realize ZVS of primary edge and ZCS of secondary edge, reduce system loss and improve charging efficiency .
Bidirectional flow
With the development of V2G, V2X and other technologies, DC charging piles need to achieve bidirectional flow of energy. In a typical bidirectional topology, 1200V power devices can be used in both front and back stages. High voltage MOSFET shows excellent device characteristics in this application .
Device selection
For the field of DC charging pile, we can provide a complete chip selection solution, including IGBT, MOSFET and other products, to provide assistance for the design of highly reliable DC charging module .
Specific product features
The charging module has a CAN communication interface, and communicates with the monitoring module using CAN communication protocol. The charging module has a built-in isolation chip for isolation communication. The output voltage, current limit value and switching machine of the charging module can be controlled by the supporting monitoring module. The charging module supports hot pull and plug, with input over/under voltage protection, input over current protection, input three-phase unbalanced protection, output over voltage protection, output current limit protection, output short circuit protection and overheating protection .
The charging module of the DC charging pile consists of many parts, including transformers, rectifiers, filters, and heat dissipation systems.
To sum up, the charging module of the DC charging pile is a complex system that integrates a variety of power electronic technologies, which ensures fast and safe charging of evs through efficient power conversion and control technologies.
DC CHARGING PIlE SERIES
DC charging pile is an efficient charging facility for electric vehicles, which uses direct current (DC) to directly charge the vehicle battery, significantly reducing the charging time. Compared with traditional AC charging piles, DC charging piles are able to provide higher power output and can usually charge an EV to 80% of its capacity in 30 minutes, providing users with a convenient charging experience.
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