On June 22, a fire accident occurred on a hybrid bus in Xiamen, causing 11 buses to be burned down and one person to die. According to police investigations, it was determined that an electrical failure in the battery pack at the rear of a bus caused spontaneous combustion, which quickly spread and caused other buses parked in the same row to burn. In addition, the recent Wuzhoulong electric bus fire incident in Shenzhen and Nanjing electric bus fire incidents have caused public concern about the safety of new energy vehicles.
How to avoid similar accidents? In addition to strengthening product quality assurance for electric vehicle enterprises, various technical standards in this new field must also be established. Wu Changshun, director of the National Center for Wire and Cable Quality Supervision and Inspection (hereinafter referred to as TICW), said that traditional vehicles have safety level cable standards, but entering the era of electric vehicles, these standards cannot fully guarantee the safety of electric vehicles. Due to changes in the power system of electric vehicles, the voltage and current transmitted by relevant wires and cables are completely different from those of traditional vehicles. If the wire and cable standards of traditional vehicles are still adopted, the probability of fire and electric shock accidents will greatly increase. Therefore, recently, TICW, in conjunction with the China Quality Certification Center (CQC) and German DeKRA Quality Certification Co., Ltd. (DEKRA), jointly issued the "Electric Vehicle Charging Device Equipment Cable Standard K175/CQC1103-1105". In the future, new standards for electric vehicle wires and cables will be developed and released in succession to promote the safety and convenience of electric vehicle wires and cables. In the future, if there is a safety liability accident for electric vehicle charging piles, relevant responsibilities can also be identified and investigated based on the standards.
Xie Zhiguo, Deputy Director of the Fourth Product Certification Department of the China Quality Certification Center (CQC), stated to the First Electric Network that the interface standard for electric vehicle charging piles has currently been released in 2011, and the recently revised version of the new national standard has been completed, and will soon be released in 2015 or 2016. The release of this national standard is mainly aimed at solving the compatibility and safety issues of electric vehicles and charging piles in the future. However, there are also wires and cables at both ends of the charging interface. The revision process of the new national standard for charging interfaces has also consulted the relevant standards for wires and cables, because the real risk of electric vehicle fire and electric shock is not only related to the interface, but also an important link, especially DC high-voltage fast charging, The charging current is much higher than the current transmitted by ordinary electrical wires and cables, so if the cable does not meet the standard, it is likely to cause a fire accident. Therefore, the electric vehicle charging cable standard launched first this time will incorporate charging pile cables into a standard system from the aspects of safety and testing standards, which can not only provide manufacturers with a unified standard as a reference, but also guarantee quality and safety.
Currently, most electric vehicle charging pile cables on the market are orange, so will orange become the unified standard in the future? Ms. Liu Weihai, Director of Electric Vehicle Components and Special Cables for Greater China at Dekai Quality Certification (Shanghai) Co., Ltd., said that the original color requirement for vehicle charging cables in the wire and cable standards was orange, but there was no clear requirement for the color of charging pile cables, except that everyone habitually followed the orange design. In fact, there are also black and dark blue charging pile cables on the market, but the number is relatively small. It is estimated that cables of various colors may appear after a large number of charging piles appear in the future.