ESS Charging system charging method and charging station for charging electric vehicles mainly during mid-load and heavy-load periods with power automatically charged to the ESS during light load times

摘要

If the charging infrastructure uses only AC power from the power company, especially when many vehicles are charged during heavy load hours, the national power reserve ratio will drop, which may cause fatal problems in the stable operation of the national power grid. As an alternative to this, a method of using a dedicated ESS or a mixture of a spare ESS and AC power can be applied, but it is difficult to convert 400kW of high power into a relay, etc. There is a high risk of sparks caused by the transition between the two. In the present invention, the power line of the charging station consists of an ESS power line and an AC power line independently, and a charger is independently connected to each power line. Therefore, there are two chargers in the same parking area, and the user prefers to use the main ESS charger. use. Through the present invention, the ESS module is automatically charged during the light load (midnight power) time period, and the ESS module charging power is mainly configured to charge the electric vehicle at the maximum load time, thereby increasing the efficiency of the national power grid and increasing the power consumption ratio. can be raised