How fast can a car charger charge?
Charging piles are mainly used to store electricity for electric vehicles. Nowadays, new energy vehicles are very in line with the concept of environmental protection. At the same time, they also solve the problem of refueling costs. The charging speed of car charging piles can be fast or slow. What are the factors? Caused by it? Let’s take a look at what are its influencing factors?
1. The impact of charging piles. In simple terms, the greater the power of charging piles, the shorter the charging time. However, electric vehicle-connected charging piles are currently divided into AC charging piles and DC charging piles, which can be explained separately. . In terms of AC piles, most slow-speed electric vehicle charging piles or charging boxes in China use 220V AC batteries for charging. The input and output currents are 16A or 32A respectively, and the theoretical output power can reach 3.3kW or 6.6kW respectively. kW, taking into account the 10% output power loss, the AC battery charging rate is relatively slow.
For example, for a pure electric vehicle with a general battery capacity of 20kWhoc, using the current mainstream 3.3kW AC battery charging method will require 6-8 C to fully charge. For Tesla’s 220v HPWC (power wall-mounted power adapter), the input and output current can reach 50A. The output power is 11kW. People don’t need to think about it. 1. The dangers of charging piles. In simple terms, the greater the power of the charging pile. , the battery charging time is shorter, but currently electric vehicle-connected charging piles are divided into AC charging piles and DC charging piles, which we can analyze separately. In terms of AC piles, most slow-speed electric vehicle charging piles or charging boxes in China use 220V AC batteries for charging. The input and output currents are 16A or 32A respectively, and the theoretical output power can reach 3.3kW or 6.6kW respectively. kW, taking into account the 10% output power loss, the AC battery charging rate is relatively slow.
2. The impact of the vehicle-mounted charger. During the charging process of the vehicle AC battery, the vehicle-mounted charger will participate in the current conversion process. Generally, the AC current will be converted into alternating current by the vehicle-mounted charger as electromagnetic energy storage. into power lithium batteries. Therefore, the author of the electric vehicle charging pile manufacturer believes that for the design of the on-board charger for the entire vehicle, its power must be matched with the AC power, which is generally 3.3kW00, even if a charging pile input and output with a higher power is used The current is only 0 at the 16A port, and the battery charging rate is not fast. However, it can be expected that with the increase in power consumption of lithium batteries for electric vehicles, the output power of the vehicle charger should be above 6.6kW in the future to satisfy customers. Regulations on battery charging rates. Once, while inspecting charging piles, I found that the Shenbao electric vehicle can charge at 220V/32A. Through the analysis, I learned that the power of the on-board charger can reach 6.6kW, and the charging speed is much faster than that of the E150EV.
3. The impact of lithium-ion batteries: In the same situation where the input and output power at the charging station is fixed, the larger the vehicle battery capacity, the longer the charging time will be, which is just like the arithmetic problem of student A. Put water pipes of the same size into the pool. The larger the pool, the longer it takes to fill it with water. This principle is very simple. In addition, the specific energy of yuan-material lithium batteries is generally higher than that of polymer lithium batteries. Therefore, for the same car series, if the required cruising range is the same, the number of yuan-based rechargeable batteries will definitely be less than that of polymer lithium batteries, and the charging speed will be lower than that of polymer lithium batteries. Of course, just say something quickly.
The above are the three main influencing factors on the charging speed of electric vehicle charging piles. The charging speed of electric vehicle charging piles directly affects the user experience, so we must understand it clearly.