The AC charging pile is fixed outside the electric vehicle, connected to the AC grid, and provides AC power supply equipment for the new energy vehicle on-board charger. The AC charging pile itself has no charging function, only the function of controlling the power supply. Since the power of the on-board charger is not very large, mostly 3.5kw and 7kw, the charging speed of the AC pile is relatively slow.
The voltage transmitted by the actual power grid is high-voltage direct current, which is converted into usable household direct current through the function of a rectifier, which is what we often call 220V voltage, and the function of the on-board charger is similar to the rectifier inside an electric vehicle, which can convert alternating current into Direct current charges the car.
The AC charging pile is compact and can be wall-mounted or floor-mounted, and connected to a single-phase 220V dedicated line power supply for installation and use. It supports two payment methods of code scanning and card swiping. The input end is connected to the AC power grid, and the output end is equipped with a charging plug to charge electric vehicles. The output current is constant, the charging efficiency is high, and the operation process is simple, suitable for people of all ages. It has multiple charging methods such as time mode, amount mode, constant power mode, and full self-stop.
Usually the AC charging pile is composed of human-computer interaction, control module, metering module and safety protection module, which integrates safety protection, switching power supply, relay, leakage detection, Bluetooth, 4G module, electric energy metering module, etc. on one board, with external lights With and display screen, it realizes charging gun guide signal control, AC voltage detection, charging current detection, energy metering, leakage detection, emergency stop protection, temperature protection, undervoltage protection, output short circuit protection, card swiping, overcurrent detection, LED control, 4G networking, Bluetooth communication and other functions. https://www.afaxpower.com/products
Why are AC charging piles so popular? First of all, because the cost of AC piles is relatively low, the structure is simple, only single-phase 220V voltage is required, the installation is fast, the investment and construction restrictions are small, and there is no need to coordinate power grid resources and land use rights, it is the first choice for building piles for households and organizations; Secondly, the power of the AC pile is relatively small, and the impact on the power grid is also small; finally, because slow charging is friendly to the battery, it is beneficial to prolong the service life of the battery.
The charging power of the charging pile can be realized by increasing the charging current and charging voltage. Under the condition of a certain voltage, the increase of the current will increase the heat release during charging, which requires higher heat dissipation performance of the charging pile; under the condition of a certain current, Increasing the voltage can increase the charging power without significantly increasing the heat release during charging. Therefore, many new energy vehicle manufacturers choose to increase the charging voltage.
Charging piles are not only affected by extreme natural weather during use, but also have the ability to resist electromagnetic interference. Therefore, when designing, we must pay attention to the sealing and stability of the external structure to prevent rain and snow from entering the interior and causing short circuits and failures. ; The external electromagnetic induction signal will interfere with the signal reception and output of the charging pile. The layout of the electrical circuit should be considered in the design to minimize the influence of the electromagnetic signal.
The design and application of charging piles for new energy vehicles is an important factor in promoting the development of electric vehicles. Muwo's research and development and innovation of AC charging piles is the key to promoting the development of the charging pile industry and market expansion, and has accelerated the pace of energy green and low-carbon transformation
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