In recent years, with the development of intelligent and digital technologies, wireless charging has been increasingly applied in fields such as smartphones, wearable devices, automotive electronics, and household appliances, with a huge market potential. It is expected that by 2024, the annual shipment of smartphones supporting wireless charging will exceed 1.2 billion units, while the global wireless charging market size is expected to grow to 14 billion USD by 2022, with an average annual growth rate of 27%.
Data source: Published by CICC International Consulting."2020-2026 China Wireless Charging Market Research and Investment Recommendation Forecast Report"
As one of the main forces in the automotive electronics business of Foryou Corporation (stock code: 002906), Foryou Multimedia has been committed to the development of wireless charging for automotive applications since 2012. It joined the WPC Alliance in 2013 and was the first to pass the Qi 1.2.4 standard certification in 2018. It has now completed the interpretation of the Qi 1.3 standard draft and has reserved some technical solutions. From 5W charging to 15W charging, and adding functions like NFC, Foryou Multimedia's automotive wireless charging products continue to innovate and have become one of the quality suppliers for many domestic and international car manufacturers.The automotive market heat is increasing year by year.
Data shows that as of mid-July 2019, there were a total of 1,238 car series in the domestic market, of which 161 series supported wireless charging for mobile phones, accounting for 13%. Each car series includes several to dozens of models.
In 2018, the global shipment of automotive wireless chargers (including both original and aftermarket) that passed Qi certification exceeded 12 million units, with a year-on-year growth of 101%.Under the trend of wireless charging, there is still significant development and penetration space for both original and aftermarket.Data source: Autohome and Strategy Analytics.
Detailed explanation of the technical highlights of Huayang Multimedia's wireless charging products.
The efficiency of wireless charging and the adaptive design for various mobile phones.
Huayang Multimedia has researched the dimensions and receiving coils of all current mobile phones with wireless charging capabilities. By combining structural design limitations and coil placement, it can adapt to almost all wireless charging mobile phones while maximizing charging efficiency within the effective charging area.
Depending on the metal content and structural design of different mobile phones, in addition to the Qi standard, Foryou Multimedia has also conducted FOD PLOSS calibration for certain special mobile phones, further improving compatibility.
Excellent EMC performance.
The EMC performance of automotive electronic products is one of the mandatory requirements for electronic products, while wireless charging products achieve charging functions by emitting energy, which is contrary to EMC requirements.
Foryou Multimedia's wireless charging products meet the highest level of EMC testing requirements through excellent technical design. At a working frequency of 120KHz, it strives to minimize electromagnetic radiation by using a sine wave method. When users are using the AM frequency band of the radio, it actively adjusts the charging frequency to avoid interference with the radio function. It also actively avoids interference with the wireless key by receiving the PEPS function status.
Excellent heat dissipation performance.
During the mobile phone charging process, if the temperature is too high, the phone will actively request to reduce the charging power, which will affect the charging time.
Foryou Multimedia's wireless charging products use cast aluminum heat sinks, fully considering the heat dissipation path in the structural design, and have unique insights in passive heat dissipation design.To further ensure heat dissipation, fans will be added, using reverse airflow cooling technology to further control the temperature rise of the mobile phone while preventing the conduction of heat from the charging end, thus improving charging efficiency.Reliable safety assurance.
As the charging power increases, safety requirements are becoming higher.
Including the following aspects: Foryou Multimedia's wireless charging products have always included functions such as FOD detection, over-temperature, over-voltage, and over-current protection.
During product design, tests for human exposure to electromagnetic field radiation were added, with reference standards including EN62311, ICNIRP, and automotive manufacturer standards.
In response to automotive manufacturer requirements, Foryou Multimedia has incorporated ISO26262 functional safety standards into its automotive wireless charging products, meeting ASIL B level requirements.
Foryou Multimedia's "black technology" in wireless charging and future development plans.
Huayang Multimedia has been continuously innovating in the development of wireless charging products, constantly adding new highlights.
Adaptation to private protocols and higher charging power.
Currently, in addition to the Qi standard protocol, Samsung's private protocol, and Apple's private protocol, domestic manufacturers have also launched their own wireless fast charging private protocols.
Foryou Multimedia was the first to complete the adaptation of OPPO's fast charging protocol, enabling 40W wireless fast charging for OPPO phones. (The actual maximum is 65W, limited to 40W for safety reasons). The fast charging function poses higher requirements for power design, heat dissipation design, and safety design. Currently, these challenges have been overcome and are about to enter mass production. Huayang Multimedia is also actively seeking cooperation with other mobile phone manufacturers to adapt to more fast charging protocols. Single coil automatic alignment function.
Currently, the mainstream wireless charging solution is three coils. Although it increases the charging area compared to a single coil, there is still a very small charging blind spot at the intersection of the coils.
At the same time, with the continuous introduction of new mobile phones, some mobile phones inevitably have special requirements for FOD indicators, which limits the adaptability of three coils. Foryou Multimedia has completed the preliminary research on the single coil automatic alignment solution and obtained a patent certificate.When the wireless charging terminal detects the position of the mobile phone, it will automatically move the charging coil to the optimal position. This technical solution ensures that the charging efficiency at any point within the charging range is the highest, adapting to future unknown special requirements of new mobile phones, while also reducing the standby wireless transmission power, improving EMC performance.
Intelligent mobile terminal interface with diversified functions.
According to Huayang Multimedia's product planning, future wireless chargers will surpass the function of wireless charging itself, bringing more new experiences.
根据华阳多媒体的产品规划，未来的无线充电器已经超越了无线充电本身的功能，带来更多新的体验。
Mobile signal enhancement function: The terminal receives external mobile network signals, GNSS signals, etc., amplifying them nearby to enhance mobile signal and improve the user experience.
Mobile identity recognition function: Identity recognition is achieved through mobile NFC and Bluetooth signals, enabling keyless entry and one-button start functions. This feature meets future travel needs, allowing the phone to replace not only the wallet but also the car key.
In the future, Foryou multimedia wireless charging product line will continue to focus on the application of mobile smart terminals like smartphones in vehicles, collaborating with other automotive electronics product lines, and actively exploring infinite possibilities with OEMs to develop more new features, allowing car owners to enjoy a more attractive smart car life!
