EV Charging stack charging power allocation mode. Ring network and matrix are two commonly used charging methods in EV charging stack. The following is an introduction to them:
1. Ring network charging principle:
Ring network charging refers to connecting multiple charging piles into a ring-shaped power grid through cables to form a current closed loop. During ring charging, the charging current flows from one charging pile to another until it returns to the starting charging pile, forming a cycle.
2. Advantages of ring network charging:
Ring network charging can realize power complementation between charging terminals, and improve charging efficiency and charging speed. Ring network mode reduces current concentration and voltage loss and is suitable for large charging stations. It reduces hardware costs and can achieve efficient charging.
3. Limitations of ring network charging:
Ring network charging requires cable connections between EV charging stack circuits. At the same time, ring network charging needs to ensure the current balance between charging stacks,
otherwise charging efficiency and charging speed will be affected. The ring network charging mode is only suitable for large charging stations. The ring network is a ring-shaped power grid.
Once the charging nodes on both sides are occupied, the charging node cannot call the current of other free charging nodes for charging.
The flexibility of power distribution is reduced. In large charging stations, There are many charging nodes,
and the probability of charging nodes being occupied and blocking the current loop is low.
4. Array charging principle:
Matrix charging refers to connecting multiple EV Charging stacks in a matrix form to form a two-dimensional current network. In matrix charging, the charging current can flow on different matrix paths.
5. Advantages of matrix charging:
Matrix charging can realize the transmission of electric vehicle charging needs. There is no possibility of charging nodes being occupied in ring network charging, which greatly improves the flexibility and scalability of charging. Matrix charging is often used in distributed charging systems or charging networks to improve the reliability and stability of the charging system and reduce current concentration and voltage loss. At the same time, the matrix has multiple charging circuits, and the control system can fully call the system based on this characteristic. All charging resources are charged on demand, and there will be no shortage of electric vehicle charging needs.
6. Limitations of matrix charging:
Matrix charging requires complex circuit connections between EV charging stacks, which increases the complexity and cost of the system. The cost of laying large charging stations is huge.
7. Choice of ring network and matrix charging:
Ring network charging is suitable for large charging stations or charging networks and can achieve efficient charging. Matrix charging is suitable for distributed charging systems or charging networks,
which can improve the reliability and flexibility of the system. Choosing the appropriate charging method requires consideration of the size of the charging system, on-site power rollout complexity, and cost.