Application of New Energy Vehicle Charging Pile Cables: Key Roles, Types and Characteristics

At the moment when new energy vehicles are booming, charging pile cables are the key link of the charging system, and their performance is directly related to the efficiency, safety and reliability of charging. With the continuous increase in the number of new energy vehicles, the construction of charging piles is also accelerating, and the demand for adapter cables is becoming more urgent.

1. AC charging cable: a reliable choice for home slow charging

AC charging cables are mainly used to connect single-phase or three-phase AC charging piles and electric vehicles, and are widely used in home scenarios. Its internal structure includes live wire, neutral wire and ground wire to ensure the stability and safety of power transmission. Taking the common 7kW AC charging pile as an example, when the distance from the distribution box to the parking space does not exceed 55 meters, YJV36 square cables are usually selected; if the distance is between 55-90 meters, YJV310 square cables are required. With its simple structure and relatively low cost, AC charging cables provide car owners with an economical and convenient home slow charging solution. However, due to the relatively low AC charging power, the charging time will be relatively long.

Driven by the global "dual carbon" goal, energy storage systems have become the core support for building new power systems. As the "blood vessels" of energy storage devices, the quality and performance of energy storage cables directly determine the charging and discharging efficiency, stability and safety of the system. With the rapid growth of renewable energy installed capacity and the continuous expansion of industrial, commercial and household energy storage scenarios, the construction of energy storage power stations and distributed energy storage facilities is in full swing, which has explosively increased the demand for professional cables with high flame retardancy, high temperature resistance and low loss characteristics. Every qualified energy storage cable carries the heavy responsibility of efficient conversion and safe transmission of electric energy. Its technological innovation and capacity improvement are becoming a key link in ensuring the high-quality development of the energy storage industry.

2. DC charging cable: a strong support for public fast charging

DC charging cables bear the heavy responsibility of connecting DC charging piles and electric vehicles, and are the core components in the field of public fast charging. In addition to the positive and negative high-voltage DC wires and ground wires, the cable is also equipped with communication wires and control wires. This complex structure can not only achieve the rapid transmission of high-power electric energy, but also accurately match the charging needs of electric vehicles through communication and control systems, greatly shortening the charging time. For example, the liquid-cooled high-power charging cables used in the super charging stations at the Beijing Winter Olympics venues can increase the vehicle's range by 100km in 3-5 minutes. However, DC charging cables have extremely strict requirements on insulation, heat dissipation and other performances due to the need to carry large currents and high voltages, and the manufacturing cost is relatively high.

3. Power access cable: the "power entrance" of the charging pile

The power access cable is responsible for connecting the charging pile to the meter or distribution box to provide a stable power input for the charging pile. Depending on the application scenario, three-phase or single-phase low-voltage cables can be selected. Common types include YJV (cross-linked polyethylene insulated polyvinyl chloride sheathed power cable), RVV (polyvinyl chloride insulated polyvinyl chloride sheathed flexible cable), etc. The selection of its specifications needs to comprehensively consider factors such as the charging pile power and power supply distance. For example, in the underground garage of a residential area, if it is a 7kW charging pile and the distance is short, a smaller specification cable can be used; in public fast charging stations, due to the high charging power, large-section, high-specification power access cables are often required to ensure stable power transmission and meet the needs of multiple electric vehicles for fast charging at the same time.

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