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• Time:2024-10-08

The electric car charging system is an energy supply facility to maintain the operation of electric vehicles. It is a power conversion device with specific functions used to extract energy from the power supply to charge the power battery. The following is a detailed analysis of the electric car charging system:

1. Charging system composition

The electric car charging system mainly includes AC (slow) charging system and DC (fast) charging system. The specific components are as follows:

Slow charging system: mainly composed of power supply equipment (AC charger or household AC power supply), on-board charger, slow charging port, charging gun, high-voltage wiring harness, low-voltage control wiring harness, high-voltage control box, power battery, vehicle controller (VCU) and other components.

Fast charging system: mainly composed of fast charger (DC charger), fast charging interface, high-voltage control box, power battery, vehicle controller, high-voltage wiring harness and low-voltage control wiring harness.

2. Charging method and principle

AC charging (slow charging):

The AC charger converts the AC power of the power grid into the DC power required in the car.

The charging power depends on the power of the on-board charger. The power of the on-board charger of the current mainstream models is 3.5Kw, 7Kw, 11Kw, etc.

The charging time is long. Hybrid models need 4 to 6 hours to fully charge, and pure electric vehicles need more than 8 hours to fully charge.

The charging rate is basically below 0.5C, which is friendly to the battery and low in cost.

DC charging (fast charging):

The DC charger has a built-in power conversion module, which can directly convert the AC power of the power grid into DC power without the need for conversion by the on-board charger.

The charging power depends on the battery management system and the output power of the charging pile, whichever is smaller.

The charging time is short, and generally about 80% of the power can be charged in half an hour to an hour.

Fast charging has certain losses to the battery and is relatively expensive.

3. Charging system characteristics

Safety: The charging system must ensure the personal safety of personnel and the safety of power batteries.

Ease of use: The charging system has high intelligence and does not require operators to intervene too much in the charging process.

Economical: Low-priced and high-performance charging equipment helps to reduce the cost of the entire electric vehicle and promote the commercialization of electric vehicles.

High efficiency: High efficiency is one of the important requirements for modern electric car charging systems.

Low pollution: Charging equipment using power electronics technology will generate harmonic pollution to the power supply network and other power supply equipment. When the load of the charging system increases, the impact on the power supply network cannot be ignored.

4. Charging interface and standard

There are two main types of charging interfaces for electric vehicles: GB/T and Type 2. Although they are different in shape, they both connect the charging pile and the vehicle so that the current can flow smoothly into the battery. In China, the standards for AC and DC interfaces are respectively stipulated by GB/T20234, where the AC interface adopts a seven-pin design and the DC interface adopts a nine-pin design.

5. Charging precautions

Planning the itinerary: Before a long-distance trip, you should plan the charging route to ensure that there are enough charging piles along the way.

Avoid over-discharge: Try to keep the battery power between 20% and 80% to avoid frequent deep discharge that affects the battery life.

Regular inspection: Regularly check whether the charging interface and line are damaged or aged to ensure charging safety.

Take advantage of peak and valley electricity prices: If conditions permit, you can use the low electricity price period at night to charge, which is both environmentally friendly and saves money.

In summary, the electric car charging system is an important part of electric vehicles, and its performance directly affects the endurance and ease of use of electric vehicles. With the continuous advancement of technology and the improvement of infrastructure, the charging of electric vehicles will become more and more convenient and efficient.

If you want to know more about "electric car charging system", you can consult us online or by email (sales@hjlcharger.com).