Development And Controversy Of Charging Standards For Electric Vehicles

In October 2011, seven major automotive companies in the United States and Germany announced that their electric vehicles would try the unified charging socket standard. These seven companies are Audi, BMW, Daimler, Ford, General Motors, Porsche and Volkswagen. Subsequently, the Society of Automotive Engineers (SAE) announced that it had designed a plug that could be applied to the primary and secondary charging standards. Three-stage DC fast charging can fully charge your electric vehicle battery in 15 minutes. In the case of secondary charging (110 V in the United States), the charging time is about 4-6 hours, depending on the vehicle model. The charging socket standard agreed by the seven companies is also compatible with SAE J1722 charging standard and European IEC 62196 Class II socket.
The seven European and American automobile companies also agreed to use the HomePlug GP interface technology of the Home Power Line Network Alliance as a common transmission protocol, which will enable charging to be integrated into the future smart grid. HomePlug Power Line Alliance is composed of semiconductor companies, utility companies, marketing companies and other types of companies. Members include various international companies, such as Cisco, France Telecom, China Huawei, etc. These companies work together to develop, produce and promote new technologies and applications that can improve power network and connectivity.
Chademo standard DC fast charging station can charge up to 80% in 30 minutes. This fast charging device is obviously more popular than the ordinary secondary charging pile, but its operation requires the instantaneous power of the power grid to reach 50 kilowatts, thus causing concern about the pressure of the power grid, so the Chademo-standard DC fast charging is not the solution for ordinary household charging. The SAE charging standard distributes household electricity reasonably through HomePlug GP technology to ensure that household appliances are not disturbed [4]. Wireless power transmission technology is a technology that uses radio technology to transmit electric energy. Various countries are developing this wireless charging device.
In September 2022, scientists from Harvard University developed a new type of solid-state lithium metal battery for electric vehicles (EV). The battery can be fully charged in 3 minutes in the experiment, and can be recycled more than 10000 times in its life cycle, and can be used for 20 years [9]. In October, researchers at Pennsylvania State University of the United States designed a new battery structure. This new technology completes the charging of electric vehicles in ten minutes