This article will introduce two national standard charging pile interfaces-AC charging pile interface and DC charging pile interface, and introduce related interface technology around the commonly used AC charging interface. Friends who want to know don’t miss it~
Basic introduction of charging pile interface
Compared with traditional gasoline vehicles, pure electric vehicles have many advantages, which are not listed here, but there is a trouble with pure electric vehicles that need to consider the length of charging time and battery life. There are many compromises in the field of hybrid power, such as plug-in, extended range, etc., which does not require a large battery capacity. Compared with pure electric vehicles, it shortens the waiting time for charging (and uses gasoline/diesel to increase the range) .
In the field of pure electric vehicles, it is difficult to unilaterally optimize the charging time or battery life. Fish and bear's paw cannot have both, because the life of the battery is related to the charging rate. In general, the greater the charging and discharging rate, the number of cycles. The smaller.
In order to ensure that the number of cycles of battery charging can be between 800 and 1000, usually the charging rate should be between 0.5C and 0.25C. The national grid is used for power supply, and the on-board charger is used to charge the power battery. This is a slow charging solution. The public facilities are AC charging piles.
The AC charging pile charges the battery through the on-board charger. Compared with the DC charging pile, the AC charging pile is low in cost, simple in structure, more battery-friendly, and suitable for popularization in a large area. Next, I will introduce AC from the shallower to the deeper. Interface technology of charging piles.
The main function of AC charging piles (including national and non-national standards) is to draw out single-phase or three-phase electricity. The charging pile only functions as a current transfer station. The subsequent rectification + DC/DC conversion is performed by the on-board charger. carry out.
The national standard AC charging pile is based on the original AC charging pile shown in the above figure, adding some commercial modules (such as human-computer interaction interface, billing module, alarm module, etc.) and control guidance circuit. The control guidance circuit is AC charging. The core content of pile interface technology.