Behind the rapid development of the automotive industry in recent years, there is a strong "guardian", which is the power system. For automakers, the power system is the "lifeline" for maintaining the normal operation of a large automotive manufacturing plant.
With the continuous improvement of the automation level of automobile manufacturing plants, the power quality requirements of inverters, robots and other power electronic components widely used in automated production lines are getting higher and higher. Power quality problems, including voltage sag, can cause economic losses such as unplanned plant shutdowns, equipment downtime, critical equipment damage, and product scrap. According to a research report by the American Electric Power Research Institute, the average loss of a car caused by a power quality problem of up to 4.3 million yuan. Power quality issues have become one of the key factors for automakers to achieve efficient production.
Electric vehicle high voltage cable performance requirements and standards
As a carrier of transportation electrical energy, the importance of the safety and stability of the power supply system in the automobile factory is also highlighted. A safe and stable power supply system transmits power at a specified voltage level. In the actual transmission process, the higher cable material resistivity will cause serious voltage loss, so that the actual voltage can be deviated from the voltage level specified by the power supply system, thereby accelerating the damage and aging of the equipment, and in serious cases, directly damage the equipment. Causes equipment to stop. For car manufacturers, a safe and stable power supply system is an important prerequisite for them to maintain the operation of complex electrical equipment to ensure normal production for 24 hours.
How to ensure the safety and stability of the power supply system? Optimizing the power supply line, including the use of lower resistivity and better conductivity cables is an important means.
Among the many cables, copper cables are undoubtedly the best choice. Why is copper cable unique? First, the conductivity of copper is very high, about 1.57 times that of aluminum. The excellent electrical conductivity of copper makes the cable less susceptible to heat, ensuring safe and energy efficient power supply. Second, copper cables and aluminum cables with the same cross-section have larger current carrying capacity, lower voltage loss and lower failure rate, which can meet the huge power supply of automobile manufacturers and lay an important foundation for ensuring uninterrupted operation of equipment. Third, copper has strong antioxidant properties. Even if copper is oxidized, the resulting copper oxide is still a good conductor, and the electrical connection properties of the joint and the terminal can be ensured. The aluminum oxide formed by oxidation of aluminum is an insulator, which may affect the electrical conductivity of the joint or the terminal, and may cause heat generation of the joint or the terminal to cause cable failure or even fire.
In addition, copper cables also have superior high temperature resistance. Aluminum has a melting temperature of 660 ° C, and copper can reach 1080 ° C. Even in high temperature environments, copper cables can maintain the function of power supply, which provides another important guarantee for car manufacturers to achieve electricity safety.
It is worth mentioning that copper cables not only ensure the safety of automotive manufacturers, but also contribute to their sustainable development. Copper is a typical "green" metal that achieves 100% recovery. Indirectly, copper cables are more environmentally friendly, helping to better sustain the automotive industry.