Industry new
Wireless charging group standard:
On
May 31st, 2018, the editorial conference of "Mobile Terminal Wireless
Charging Part IV: Performance" was held in Shenzhen. The conference was
co-sponsored by China Electronics Standardization Institute and China
Communications Industry Association. The organizer was Xiaomi
Technology. The conference location was Shenzhen Xiaomi Mobile Software Co., Ltd. The
invited participants include: Apple, Huawei, Xiaomi, Meizu, OPPO, vivo
and other first-line mobile phone manufacturers, and Vodafone, Lianzhi,
Meixin, New Page Microelectronics, Wuwei Smart, Qiaowei Power Supply,
Olympian, etc. Supply chain representative. The
topic of this discussion is “Mobile Terminal Wireless Charging Part IV:
Performance”, which will mainly discuss the relevant scope and outline
of the defined standards. Charging
Head Network, as an exclusive specially invited media participant,
participated in the discussion and latest development of wireless
charging group standard "Wireless Charging Technology Specification for
Mobile Terminal".
The
previous first meeting identified the first three parts of mobile
terminal wireless charging. They are: security, electromagnetic
compatibility, and environmental adaptability. This meeting will determine Part 4: Performance.
The
conference was presided over by China Electronics Technology
Standardization Institute Yu Hong, first of all briefings on the
preparation of the group standards, complying with the Qi standard
specification within 5W, and other than 5W can be formulated by us,
indicating that the wireless charging standard for mobile terminals over
5W is this time Discussion topic of the conference. The meeting focused on the mainstream Qi standard specification, and the A4WP standard was considered separately.
Each participating company submitted a technical program, and each of them expressed their opinions:
Huawei
stated that for the sake of security, the wireless fast charging
protocol was encrypted in order to prevent the damage of bad products
from mobile phones to mobile devices. In addition, EPP can only be 15W, because it can not reach this power, so it is private. At
the same time, it is also recommended that the upper limit of the
wireless charging power of the mobile terminal standard be initially set
to 65W or 50W.
Mickey says wireless fast charging will be a good selling point if it can reach the speed of wired charging. It
is recommended to determine the wireless charging level, such as
determining the maximum fast, fast, acceleration, normal wireless
charging power, and output voltage. At the same time, it is stated that the privatization of wireless charging protocols cannot be avoided.
Vodafone
agreed with Huawei's proposal for security. It is suggested that
efficiency, time, and fever should be defined in the standard. It is
recommended that the specification be “continuous charging”, and that
different standards such as A4WP can also be put into this group
standard.
Meizu provided a wireless charging proposal and emphasized the difference between average power and peak power. It
was thought that the session on performance should discuss
security-related content. Given that wireless charging is still in the
development stage, it should be possible for each family to flourish to
promote the development of the wireless charging market and enhance the
consumer experience. Premature
regulations concerning interconnection and interoperability will cause
Shanzhai products to affect the security of mobile phones and hinder the
development of the industry. Meizu
demonstrated the wireless fast charging proposal, achieving a
continuous battery charge current of 2A within the temperature rise
range, and a battery capacity of 3000mAh in 2 hours.
In
the end, all participating units reached a consensus that security is
the main topic that needs to be discussed in the group standard
conference. Since then, preliminary discussions on the performance of
“Mobile Terminal Wireless Charging Part 4” will initially include:
security, response time ,
power declarations and limitations, coil reference designs, etc. where
safety concerns FOD, temperature, over-voltage over-current, etc. The meeting ended and the outline of the performance section was clarified, which provided direction for the follow-up work.
kimi