When discussing Qi wireless charging technology, it's impossible to overlook the WPC (Wireless Power Consortium, Wireless Charging Alliance). As the world's first international alliance dedicated to standardizing wireless charging technology, WPC not only initiated the standardization process for wireless charging but also led the formulation of several core technical specifications, including the Qi standard. This has laid a crucial foundation for the development of the entire industry.
1.What is Qi2? What is the improvement compared to Qi wireless charging?
Qi wireless charging protocols, such as Qi 1.2.4 and Qi 1.3.3, are the general standards of current wireless charging technology. As long as the product meets the relevant parameters and has the Qi logo, it usually supports the Qi wireless charging function, which can then charge devices that also support Qi wireless charging.
Qi2 wireless charging has been upgraded based on Qi 1.3, adding the MPP protocol (physical layer) and magnetic alignment method. Its operating frequency range has been updated to a new 360 kHz, and the foreign object detection function has been significantly enhanced. Leveraging the high-precision alignment advantage of magnetic alignment, Qi2 achieves a power transmission capability of 15W through MPP and EPP modes. Furthermore, Qi2 is expected to achieve even higher power transmission capabilities in the future, further improving the efficiency and performance of wireless charging.
Compared with traditional Qi wireless charging technology, Qi2 brings a tangible daily experience upgrade —— Wireless charging is more powerful, faster charging, and supports magnetic suction high precision alignment, providing a faster, more efficient charging experience.
The differences between Qi2 and Qi are shown in the table below.
2.Qi2 magnetic suction, stable driving on the car charging
The most groundbreaking upgrade of the Qi2 standard is the introduction of magnetic levitation technology similar to Apple's MagSafe. As a member of the WPC, Apple has contributed its MagSafe technology to the WPC, which has over 370 member units. Thanks to the magnetic levitation solution under the Qi2 standard, charging devices can achieve perfect alignment, effectively reducing energy loss and providing solid assurance for charging efficiency.
The wireless charging module for mobile phones is typically installed in the central storage box or armrest compartment. It secures the device's position through its spatial shape and increases friction with patterns and materials to enhance positioning accuracy. However, during vehicle operation, complex road conditions such as bumps and turns can cause the device to shift. Magnetic attachment, on the other hand, effectively improves the stability of the device. For aftermarket bracket-mounted wireless charging devices, the importance of magnetic attachment is even more pronounced.
3.sum up
For automakers and Tier1 suppliers, a unified Qi standard can create more ideal in-vehicle wireless charging solutions. The Qi 2.0 standard serves to unify the mobile phone wireless charging protocol, particularly by introducing MPP (Magnetic Power Profile) technology based on Apple's MagSafe magnetic charging technology. By optimizing magnetic field distribution and software calibration, MPP can enhance charging efficiency, making devices more stable and reliable during wireless charging, significantly improving the user experience of wireless charging.
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