Wireless charging, as the name implies, means that users can charge wireless networking devices without using a cable. A long time ago, wireless charging technology showed great potential in the consumer market, and many battery-powered portable devices could benefit from this technology, from cell phones to electric cars.
"The wireless charging technology itself is rapidly evolving. Before last year, perhaps everyone rarely heard about wireless charging, but now the attention of the outside world has begun to increase." Tian Feng, deputy general manager of ZTE New Energy Automobile Co., Ltd. The Financial Daily reported.
At the recently held CeBIT in Germany, ZTE has demonstrated the solution of wireless charging technology on new energy vehicles. From this exhibition, we can also see that many companies have layouts on wireless charging technology. .
But aside from the optimistic data of various research companies, it should be said that the real "wireless" era has not yet arrived. The different standards, technical bottlenecks, and user acceptance still restrict wireless charging into the mainstream charging channel.
Chinese manufacturers test water
At the Hannover Electronics Show, different forms of wireless charging products can be seen from the exhibition areas of some foreign companies, such as electric tricycles that can be wirelessly charged, and mechanical devices that can be wirelessly charged. A regional bus company from Germany has begun experimenting with two inductive charging devices from Canadian manufacturers on the two electric buses. This advanced device can charge the bus when it gets in and out of the station. In some chip manufacturers' preset solutions, the wireless charging device can be buried under the main road, so that the electric car can be charged anytime and anywhere while waiting for the red light, traveling, and parking in the public parking lot.
Among the Chinese companies participating in the exhibition, ZTE also brought its own wireless charging solution. In this scheme, when the vehicle arrives at the platform, the wireless charging center can automatically identify which vehicles can be charged, and the “distribution box†at the roadside receives the command to start power transmission, and can charge one kilowatt hour of electricity every two minutes, without any need. Additional ground or wall space is no longer subject to weather conditions such as rain.
"ZTE's advantage lies in the high-power charging of this piece, and the transmission of this electric energy is the same thing as the original ZTE's communication equipment. The exchange between the mobile phone and the home WiFi hotspot energy, we see that the communication bears Video, audio and web pages, and now wireless charging is actually amplifying power." Tian Feng told reporters.
According to Tian Feng, ZTE has started research and development of wireless charging products since 2012, and has been able to stand on the same starting line with international manufacturers.
Foreign companies such as BMW have already begun experimenting with wireless charging technology. Previously, chip maker Qualcomm and US Telecom announced that it will launch a wireless inductive car charging system called "Halo" and test it with the BMW i3.
The mainstream wireless technology implementation relies mainly on the combination of the coil and the magnetic field, thereby realizing charging for the electric drive vehicle. Specifically, a wireless charging pad is installed on the ground and on the car, and the magnetic force is used to transmit power and convert it into direct current into the battery of the car. But this wireless charging system is costly.
"For the new energy vehicle, there are basically two ways to achieve this in the world. One is the advanced engine strategy, which is mainly concentrated in the countries of traditional established automobile manufacturers, and the other is pure electric drive. This is also our special research. Direction." Tian Feng told reporters that China is also setting its own standards.
Standard is not uniform
The wireless charging market has set off a wave of peaks. Nokia and Samsung have launched flagship products with built-in wireless charging function. They have sent positive signals to this market. For a time, many companies have started wireless charging projects to seize the market.
In the consumer electronics market, the most mainstream is the Qi standard technology alliance. It was established at the end of 2008 and has developed hundreds of members so far. This number is still growing. These include Verizon, NTTDocomo, HTC, Huawei, Philips, Best Buy and other companies, covering all aspects of wireless charging solutions. For members joining the Alliance, free access to technology. It is also the most influential "low power below 5 watts" wireless charging standard in the industry.
Also interested in this field is Apple. From the patent chart given by the US Patent and Trademark Office, Apple's space-free charging is to establish a charging area with a valid range of 1 meter through "near-field magnetic resonance" technology. The wireless charging technology can charge a variety of devices such as the desktop or mobile, such as the iPhone and AppleWatch. But everyone did not see any of Apple's wireless charging technology at this AppleWatch conference.
Researchers from Texas Instruments concluded that this phenomenon is the most common application of wireless charging in the car, office, home, etc.; wireless charging applications in public places such as airports are secondary use cases, but because there are different scenarios Standard, future wireless charging products will require multi-mode support.
Since the current standards are not uniform, the deployment of wireless charging senders in public places should also consider supporting multiple ports. If the infrastructure deployment in public places is not active, then mobile phone manufacturers will not be willing to introduce wireless charging mobile phones, not to mention the thickness of the fuselage should be increased by 1~1.5mm, which makes mobile phone manufacturers face the problem of how to choose.
In fact, the development of any new technology is inseparable from the standard-setting process. Now, due to the consideration of their respective interests, the relevant enterprises have alliances, but each region also has its own standards, and the differentiation is more obvious.
In the automotive sector, this differentiation is even more pronounced. JARI is the international standardization organization for automotive wireless charging technology in Japan. The inductive power transfer technology developed by HaloIPT of the United Kingdom (ie, wireless charging) has been commercialized and applied in 2012. As early as 2011, the Society of Automotive Engineers (SAE) began to work on the international standard for wireless charging of electric vehicles (SAEJ2954).
"At present, the upstream and downstream industries are not restricted by foreign manufacturers as they used to. Now internationally, Japan, the United States, and Europe all have their own standards, and technology is still evolving." Tian Feng told reporters that in the short term, though The overall market for new energy vehicles with wireless charging is not so optimistic, but I believe this is a major development trend in the future.
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