Abstract:

The group controlled charging system has the function of dynamic power distribution,which can greatly improve the utilization rate of charging modules in equipment and adapt to charging demands of multiple scenes.However,the existing group controlled charging system increases costs due to the use of a large number of power switching devices,which makes it lack of market advantages.This paper proposes a virtual matrix design method for the group control charging system.Taking the 160 kW group control charging system as an example,the system principle,power switch logic,control flow and configuration scheme are studied in detail.At the same time of meeting customers’ demand for charging function and power,the hardware cost of the charger is greatly reduced.And personalized configuration can be carried out according to customers’ demand,which is of great significance to the market promotion of the group controlled charger.A prototype is trial-produced,and the effectiveness of the design scheme is verified.

Key words: electric vehicles, virtual matrix, group controled charging system, power switch logic, personalized configuration