The charging principle of a charging pile
Release time:
Dec 20,2024
The input end of the charging pile is directly connected to the AC power grid, and the output end is equipped with a charging plug for charging electric vehicles. Charging piles generally provide two charging methods: regular charging and fast charging. People can use specific charging cards to swipe at the human-machine interaction interface provided by the charging pile to perform corresponding charging operations and print cost data. The charging pile display can show data such as charging amount, cost, and charging time.
The control system of the fast charger consists of an intelligent variable pulse charging method, which uses charging current pulses, including charging pulse T1, intermittent pulse T2, and discharging pulse T3.
The scheme of the charger in the ground charging station consists of a rectifier that can convert the input AC power to DC power and a power converter that can adjust the DC power. By inserting the live wire plug into the matching socket of the electric vehicle, the DC power can be input to charge the battery. The charger is equipped with a locking lever to facilitate the insertion and removal of the plug, and the lever can also provide a signal to confirm that it is securely locked to ensure safety. According to the communication between the charger and the battery management system on the vehicle, the power converter can adjust the DC charging power online, and the charger can display charging voltage, charging current, charging amount, and charging cost. This is just the basic principle of the charging pile; many details should be continuously improved in practical applications to achieve the most convenient usage scheme.
The AC charging pile system consists of basic components such as an LCD touch screen, printer, RS-485 interface energy meter, leakage protection circuit breaker, AC contactor, card reader, and LED lights. The LCD touch screen can provide a user-friendly human-machine operation interface and a quick and simple operation method, meeting customers' requirements for charging electric vehicles in different ways. It can display the current charging status, charging amount, and charging cost, and the friendly user interface allows customers to make corresponding selections. When the collected voltage exceeds the overvoltage protection set value or falls below the undervoltage protection set value, the charging pile stops charging. The leakage protection circuit breaker ensures that charging stops in case of emergencies such as leakage during the charging process. In case of an emergency situation that requires immediate cessation of charging, the charging can be interrupted by the emergency stop button.
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