Introduction：

In "the core of the charging pile and other" series three - electric vehicle power battery and its charge and discharge principle: AC charging pile or DC charging pile? In this paper, we briefly mentioned the difference between DC charging pile and AC charging pile. This paper will outline the DC charging pile from 5 aspects, so as to communicate with peers.

1. what is called a DC charging pile

Classification of 2. DC charging piles

3. related standards for DC charging pile

Basic composition and basic working principle of 4. DC charging pile

Development trend of 5. DC charging pile

(1) super power rechargeable reactor power dynamic distribution flexible charging

(2) loop intelligent charging in a community parking lot

(3) household type wall mounted charging pile into home appliance store, into family

(4) integration of "light charging and storage" charging and discharging

(5) share charge and charge free charge

In this paper, 11 technical problems about the design of the charging pile are given, which are interested in the technical practitioners of the charging pile.

1. can the output end of the charging module be used only with one fuse? Is it possible to use only one DC contactor?

Can the 2. DC contactor be controlled without a relay and directly controlled by the I/O signal of the controller?

3. the input end of the auxiliary power supply is added with a leakage switch. Can this be omitted? There is no leakage switch in the three-phase AC input terminal. Is this acceptable?

4. can the fan be controlled without a relay?

Can the 5. auxiliary power be merged into one by two?

6. is it possible to have an auxiliary power supply for 12V?

7. does the electronic lock fit without a relay?

There is no voltage and current detection unit in the 8. diagram. Is this acceptable?

9., when the meter is collecting the information of voltage and current, BMS is also collecting the information of voltage and current. Each charging module itself also reports voltage and current information to the charging controller. What's the difference between them?

10., the charging module group ends up with a 120 ohm resistor. Does it need to match 120 Euro resistance at each module's CAN output interface?

How many CAN communication ports are used in the 11. figure? How many RS485 communication ports? If the gun requires several CAN communication port?