Common Misconceptions about Electric Vehicle Charger  
Want to shorten the charging time, need to choose a higher power charging pile?

The answer is not necessarily. From the AC/DC charging diagram shown in Figure 1, it can be seen that if it is AC charging, the AC pile is only a power supply device, and the real charging power is determined by the on-board charger (of course, the power of the charging pile is lower than that of the on-board charger. , the bottleneck is the charging pile). At present, the mainstream on-board chargers are 3/7/11/22kW, so if a 22kW AC pile is used to charge an electric vehicle with only a 3kW power OBC, the final charging power is still 3kW.

Can it be charged at full power with a DC charging pile?  The answer is not necessarily. Although there is no limitation of the on-board charger OBC, the DC pile directly charges the battery, but the upper limit of the battery needs to be considered. The maximum power that the battery can support is also limited. For most non-high-end electric vehicles, the maximum power supported by the battery is The charging power does not exceed 150kW. Even if it is charged on a 350kW super fast charging pile, the charging power cannot exceed the maximum power allowed by the battery (BMS). Of course, the charging power of different charging stages is also different.

At present, only a few high-end electric vehicles support relatively large charging power. For example, Porsche Tycan supports a maximum charging power of 225kW, and Audi's E-Tron supports a maximum charging power of 150kW.