Author: Lin Fei **IT Times.
In recent years, the development of wired fast charging by mobile phone manufacturers can be described as a rapid progress, with 60W fast charging used in thousand-yuan machines, and 100W fast charging is popularized in flagship models. At the same time, wireless fast charging technology is also evolving, and many smartphones already support 50W wireless fast charging. However, if you want to talk about the general standard of wireless fast charging in the field of portable mobile devices such as smartphones, you have to look at the Qi 2 launched by the Wireless Power Consortium (WPC).0, there will be a lot of charging products that adopt this standard on the market this year.
QI is a wireless charging standard launched by WPC for the field of portable devices, and certified products can use the QI logo, and products of different brands can achieve QI wireless charging as long as they have the QI logo.
Qi 2. released in 2023The biggest feature of the 0 standard is the addition of MPP (Magnetic Power Profile), that is, through Qi 2A 0-certified product can be used with an iPhone and a MagSafe charger to charge instantly.
At the same time as the previous qi 1X standard, qi 20 makes wireless charging more efficient, faster, and more compatible, and certified products can use the new QI2 logo.
Higher efficiency: Wireless charging relies on solenoid coils, one or more induction coils in a charger that generate a magnetic field and transmit energy, and smaller coils in a phone or other device that collect energy. The coils must be aligned for energy to be transferred between them. The built-in magnets of the QI2 ensure perfect alignment, which reduces energy loss and increases efficiency.
Faster speed: The Qi standard initially has a charging power of 5W, which is later increased to 75W, 10W, and Qi 2The 0 standard boosts the charging power to 15W. It is expected that with the subsequent improvement of the WPC standard, the charging speed will also increase.
More compatible: Any QI2 charger can charge QI2 products, for example, users only need to buy a QI2 charger to power an iPhone, Android phone or other QI20 certified product charging.
It should be noted that although Xiaomi, Huawei, OPPO, vivo and other manufacturers have a variety of 50W wireless charging mobile phones and chargers, but because they all use private protocols, when charging devices of different brands wirelessly, the charging power can only be in accordance with Qi 1X standard, up to 10W.
qi 2.Other improvements brought about by the 0 standard include adaptive charging so that the charger can communicate with the product to adjust the real-time charging power, enabling better charging process management, better heat management, and foreign object detection for enhanced safety.
To talk about qi 2The biggest contributor to the 0 standard is definitely not around Apple, and the most important reason is that MPP is based on Apple's MagSafe technology foundation.
Apple officially joined WPC as a full member in February 2017, and in September of that year, the iPhone 8 series, the first Apple mobile phone to support wireless charging, was released, using Qi 12 Standard wireless charging protocol, but no magnetic function.
MagSafe technology was first used not on iPhones, but on the first generation of MacBook Pro laptops released by Apple in 2006. In 2016, with the launch of MacBook Pro models with a USB-C interface, Apple discontinued Magsafe. MacBook Pro models released from 2016 to 2020 do not use MagSafe technology. It wasn't until 2020 that the iPhone 12 series had a built-in magnet ring that supported magnetic wireless charging, and MagSafe was re-enabled.
Relying on the annual sales of more than 200 million iPhones, MagSafe magnetic charging has quickly become known to consumers, and there are many third-party MagSafe magnetic charging products in the accessories market, and even new energy vehicle manufacturers have prepared MagSafe magnetic charging options for their new cars.
2023 with Qi 2With the launch of the 0 standard, Apple's iPhone 15 series became the first to officially pass the Qi 20 certified smartphones.
Realistically speaking, although Apple and mainstream Android manufacturers have launched many mobile phone models that support wireless charging, compared with wired fast charging, the "evolution" of charging power and charging speed of wireless charging is obviously slow. The reason for this is, on the one hand, it is difficult to improve the technology of wireless charging, and at the same time, whether it is a mobile phone or a charging equipment, supporting wireless charging requires a lot of investment, so it is more likely to appear on flagship models, and the wireless charger is relatively large compared with the popular gallium nitride fast charger. On the other hand, the reason is that after the wired fast charging power is increased to 60W and above, it can be fully charged in less than an hour with the built-in 4000mAh capacity battery of the mobile phone, and the wireless charging speed is obviously disadvantaged, and even wired fast charging also supports charging while playing, so consumers' perception of the improvement of wired fast charging speed is significantly higher than that of wireless charging, and Android mobile phone manufacturers are also more willing to invest in research and development in wired fast charging. As a consumer, I hope for qi 2The introduction of the 0 standard can also make Android mobile phones roll up in the field of wireless charging, so that the wireless charging function can be quickly popularized.
Can an iPhone be charged with a QI2 charger?
IT Times: Without Apple certification, the QI2 charger can directly charge the iPhone 15 series, and the charging power can reach 15W. Also for the iPhone 13 series and iPhone 14 series, as long as it is running iOS 172 or higher, you can also use the QI2 charger directly with a charging power of up to 75w。
When did the first Android phone with QI2 support appear?
IT Times: Before**Samsung S24 series will become the first Android phone to support QI2, but the just-released S24 did not join QI2 charging, according to the manufacturer's development cycle, a flagship model needs at least 7 8 months, and the S24 series is indeed too late to support QI20 standard. Apple has a specific advantage in making the iPhone 15 series supportable. The Google Pixel 9 series, Moto's Edge flagship series, and the Asus Zenfone series, which are expected to be released this year, are all likely to be the first Android phones to support QI2.
How to use qi2 charger for Android phones now?
IT Times: At present, the QI2 charger has been sold on the e-commerce platform, QI2The 0 standard is compatible with QI1X standard, Android phones that support wireless charging can directly use the QI2 charger, but the charging power can only reach up to 10W. To support the magnetic function, you can buy a magnetic phone case to use together.
In 2010, three years after the establishment of WPC, Qi 1The 0 standard was officially released, which defines the wireless charging technology based on electromagnetic induction, including the communication protocol between the charger and the receiver, power transmission parameters, etc. The initial version of the Qi standard primarily supports low-power applications, with a maximum charging power of 5W.
Qi 1 in 2012Version 1 introduces BPP (Basic Power Profile), which allows simple power adjustment between charger and receiver.
Qi 1. released in 2014Version 2 introduces the Medium Power specification. Qi 1. released in 20172.4. The certification products are officially classified into two categories: BPP and EPP (Extended Power Profile).
Qi 1 released in 20213. Introduce the multi-device charging function, which supports one charger to charge multiple devices at the same time.
Qi 2. released in 20230 is currently the latest Qi wireless charging standard.
In addition to promoting the Qi standard, WPC is also actively promoting the development of wireless charging standards in other fields, such as the KI standard for kitchen appliances, which supports charging power of up to 2200W; Light electric vehicle (LEV) standard, wireless charging for light electric vehicles such as electric bicycles and scooters, electric forklifts, low-speed electric vehicles, etc.; The Industrial Wireless Charging Standard (A**) applies to commercial drones, lawn mowers, consumer robots, and vacuum cleaners.
In addition to the Qi standard, there are two wireless charging standards in the field of wireless charging for small devices: the Power Matters Alliance (PMA) and the Alliance for Wireless Power (A4WP), which are being developed by the Airfuel Wireless Charging Standards Alliance (Wireless Charging Standards Alliance) after the merger of PMA and A4MP. WPC and Airfuel take a different technical route, with the former being magnetic induction and the latter being magnetic resonance.