IC observations: Automotive wireless charging technology is unabated

After SiRi, what is the next technology hot spot? At the 2012 China Automotive Electronics International Forum and Automotive Semiconductor Applications Summit, Chery Chief Engineer Dr. Chen Jun introduced that in terms of cutting-edge technology, Chery focused on the development of automotive wireless charging technology, which is also new A development direction of energy vehicles. “The wireless charging technology we developed is high-powered, and the goal is to be able to reach 3000 watts, and now we can achieve 1500 watts. This charging technology is very important for electric vehicles because if the electric vehicles are charged at the same time wirelessly, The entire power grid will be paralyzed, and we must not only solve the problem of charging efficiency, but also solve a series of problems brought about by it.

The QI technology that pioneered the field of 5-watt power wireless charging will also lock the next target application market in the automotive sector. Deng Yunmei, chairman of the Wireless Charging Alliance Promotion Committee, also mentioned that the application of QI in public places has surpassed our imagination and not only brought more compatibility, but also constantly updated. The Alliance also plans to increase QI power from 5 watts to 30 watts to 120 watts in the next step, and finally to industrial grades, that is, 2,000 watts or more. This technology will be applied in the automotive field in the future.

The wireless charging technology of the electric car itself may be relatively far away, and the wireless charging technology for the consumer electronic devices in the car has begun to open the door to application. Stefan Graff, Director of New Technologies for the Market at Philips Lite Digital Technology Co., Ltd., said that the company’s wireless application solution developed in the car solved four problems: First, four coil technology, mobile phones do not need to be placed on the board. Fixed position, the second is the temperature, the range of smart phones are generally below zero in degrees below 45 degrees, iphone over 40 degrees when the iphone will stop charging, so as not to damage the battery. When the temperature drops to a suitable range, the charging function is turned on again. The third is the interference of signals and other related equipment in the car. The fourth is foreign interference. During the charging process, you can communicate with your mobile phone, how much energy is released, and how much energy the mobile phone receives. The difference in energy minus the charging efficiency, you know if there is any loss of foreign matter and foreign materials, if the efficiency loss is too high. The system will remind the user to pay attention and even turn off this charging mechanism.

The application of wireless charging technology also brings new functional requirements. Ke Dawei also mentioned that there are mileage management problems when using electric vehicles. It depends on whether electricity is sufficient. How long the current battery capacity can last for a long time. Haman can see that the battery capacity is continuously depreciated by providing a digital display. How long this battery can last, and also indicates where the nearest charging station is nearby, or whether it can be opened to this station for charging. If it can't or does not need to call an emergency rescue phone, it is to allow the user to operate in the car. , and then arrive at any place you want to go.