Does wireless charger work better than wired charger?

The development of smart phones can be said to be very rapid, it has become an indispensable digital product for everyone. Nowadays, mobile phones are no longer only used to make phone calls and send text messages. Our clothing, food, housing and transportation can basically be accomplished by smart phones. As we all know, in the past era of functional computers, it is normal for mobile phones to stand by for more than ten days. At that time, we could not charge our mobile phones for a week or two, but most of the smartphones now have several times the battery capacity of the functional machine era. Now users need to charge their mobile phones once a day or even twice a day.

So the question is, at this stage, wireless charger technology has always been a trend in the future development direction of smartphones, it can only be used as a supplement to wired charging technology, because its charging speed is really too slow, and the charging requirements are relatively high, then is wireless charger really superior to wired charging?

First, we need to understand the principle of wireless charger of mobile phones. From childhood to adulthood, we are accustomed to holding chargers to plug into sockets, charging mobile phones or computers, thinking of 220V high-voltage mobile phones or computers for energy transmission. For the concept of wireless charger in the past few years, it denies that it is a fantasy, but for the principle of wireless work is not clear, it gives us a charging function.

Wireless charger refers to the use of the latest wireless charger technology. By using the magnetic field generated between coils, magical transmission of electric energy, inductive coupling technology will become a bridge to connect charging base station and equipment. However, the wireless charger device transmits energy to the charging terminal device, which converts the received energy into electrical energy stored in the battery of the device. The principle of energy transmission is inductance coupling, which can ensure no exposed conductive interface. Not only can the disorderly transmission lines between devices be saved, such as electricity. Electronic devices, such as movable toothbrushes, which are often in contact with conductive media such as liquids, are safer. Radio wave is less used because of its huge space and high energy consumption. In fact, it used mine radio in its early stage. The miniature high-efficiency receiver can receive radio wave transmitted in space. Because of the huge space loss, this technology is generally only used on low-power electronic equipment to receive radio wave. The distance between the device and the launcher should not exceed several meters.

Does wireless charger work better than wired charger?

The development of smart phones can be said to be very rapid, it has become an indispensable digital product for everyone. Nowadays, mobile phones are no longer only used to make phone calls and send text messages. Our clothing, food, housing and transportation can basically be accomplished by smart phones. As we all know, in the past era of functional computers, it is normal for mobile phones to stand by for more than ten days. At that time, we could not charge our mobile phones for a week or two, but most of the smartphones now have several times the battery capacity of the functional machine era. Now users need to charge their mobile phones once a day or even twice a day.

So the question is, at this stage, wireless charger technology has always been a trend in the future development direction of smartphones, it can only be used as a supplement to wired charging technology, because its charging speed is really too slow, and the charging requirements are relatively high, then is wireless charger really superior to wired charging?

First, we need to understand the principle of wireless charger of mobile phones. From childhood to adulthood, we are accustomed to holding chargers to plug into sockets, charging mobile phones or computers, thinking of 220V high-voltage mobile phones or computers for energy transmission. For the concept of wireless charger in the past few years, it denies that it is a fantasy, but for the principle of wireless work is not clear, it gives us a charging function.

Wireless charger refers to the use of the latest wireless charger technology. By using the magnetic field generated between coils, magical transmission of electric energy, inductive coupling technology will become a bridge to connect charging base station and equipment. However, the wireless charger device transmits energy to the charging terminal device, which converts the received energy into electrical energy stored in the battery of the device. The principle of energy transmission is inductance coupling, which can ensure no exposed conductive interface. Not only can the disorderly transmission lines between devices be saved, such as electricity. Electronic devices, such as movable toothbrushes, which are often in contact with conductive media such as liquids, are safer. Radio wave is less used because of its huge space and high energy consumption. In fact, it used mine radio in its early stage. The miniature high-efficiency receiver can receive radio wave transmitted in space. Because of the huge space loss, this technology is generally only used on low-power electronic equipment to receive radio wave. The distance between the device and the launcher should not exceed several meters.

The relationship between the development of smart phones and wireless charger

As for the relationship between the development of smart phones and wireless charger, we think we can talk a lot. In fact, Apple Company is playing its part in this field. Although Apple has not yet provided wireless charger for its iPhone, as Samsung and other companies do. But it is rumored that Apple will add wireless charger to its 10th anniversary version of the iPhone. It is noteworthy that Apple joined the Wireless charger Alliance earlier this year. This also means that the 10th anniversary version of the iPhone has a high probability of adding wireless charger, but it is not yet clear whether it will still use the charging seat design.

Apple is regarded as a benchmark in the industry. If Apple pushes wireless charger, other mobile phone manufacturers will certainly follow suit. This has also led to renewed interest in the wireless charger industry. In addition, Dell is expected to launch the Latitude 7285 laptop in mid-July, which will be the first laptop with wireless charger. However, it also needs a charging pad.

However, in addition to Apple, Samsung, Dell, these electronic equipment manufacturers vigorously promote, wireless charger in order to popularize the need for hotels, restaurants, home, office equipment manufacturers and many other links to promote. For example, coffee shop tables, Hotel bedside cabinets and other embedded wireless charger boards, or direct deployment of long-range wireless charger and transmitting equipment, to achieve wireless charger for various terminal devices supporting wireless charger. But at present, this area is almost blank, few third-party manufacturers such as hotels, restaurants, home, office equipment will support wireless charger. And that’s why few mobile phone manufacturers are pushing for mobile phones that support wireless charger. In contrast, fast charging technology is more practical, it does not need the support of third parties, can achieve the improvement of endurance.

This is somewhat similar to the relationship between Wi-Fi hotspots and Wi-Fi-enabled phones when smartphones were just emerging. With the Wi-Fi hotspot, more people will use the Wi-Fi function of mobile phones, and more and more smartphones with Wi-Fi function are labeled, which also prompts more public places to start deploying free Wi-Fi hotspots. This kind of “senseless” wireless charger experience similar to Wi-Fi Internet may be what consumers really need. Of course, there are still many technical challenges to be solved, such as charging efficiency, cost of wireless charger equipment and so on.

Struggles during the research of Wireless charger Technology

Last year, Dialog, a world-renowned power management chip manufacturer, also invested in Energies and became the sole supplier of Watt UP IC components for its wireless charger technology. According to Dialog, Energies short-distance wireless charger technology has been certified by the U.S. quality control department and will soon be introduced to the market. Dialog is the exclusive seller. “In the foreseeable future, we think there’s going to be a device that can provide network connectivity while freeing you from the constraints of cable power,” said Energies CEO Rezoned.

Some people think that wireless charger technology can even be applied to larger rooms or buildings, even the whole city. In April, Air Fuel Alliance, a wireless charger standard organization, announced the launch of its first resonant intelligent urban ecosystem in Shenzhen, which can provide long-distance wireless charger services in different public places, including airports, subway stations, hotels, restaurants and shopping malls. Qualcomm and Califia are also involved in the project. It can be seen that these companies are developing “non-electromagnetic induction” solutions to achieve long-distance wireless charger. These technologies may become the next major innovation of smartphones. At present, the technological upgrading of smartphones is at a standstill. Some efforts are still confined to laboratories.

There is no doubt that this is a problem of “chicken” or “egg”. In addition to the problems of wireless charger technology, wireless charger also faces the incompatibility of various standards. Each wireless charger standard is independent, and it is difficult to compatible between different wireless charger standard devices. But the most difficult problem to solve is whether there is a chicken or an egg first.

Rob Rucker, managing director of Sorenson Capital, an American venture capital firm, said: “Even if you have a router-sized radio transmitter, its beautiful enough to cover the whole house, but you still need to have charged equipment. In order to make wireless charger technology widely available, you have to seek the cooperation of consumer electronics manufacturers (such as Apple, Samsung, etc.), and their devices need to be willing to support this technology. So, even though there are so many struggles for the wireless charger technology, we have made some progress at least. All in all, what we do it to promote the development of human society and the convenience of human life and nothing else. Therefore, for such a technology, we still have to pay more attention and improve it day by day. We cannot become a fat man within one day, it needs to take time.

Few things about wireless charger

WiTricity, a wireless charger company based in Waterston, Massachusetts, USA, has long introduced magnetic resonance (MR) wireless charger technology, which allows mobile phones to charge at a distance away from the charger, and requires less stringent location requirements, as well as charging multiple devices at the same time. U-Beam, a start-up in Santa Monica, California, is also developing magnetic resonance wireless charger technology. Meredith Perry, chief executive of U-Beam, said: “What we are doing is absolutely cutting-edge science, and the idea of wireless charger has been rampant in Silicon Valley for a long time.”

Scientists at Disney Research in Pittsburgh also received attention earlier this year when they built prototype rooms of 4.8 m *4.8 m, with walls, roofs and floors all made of aluminum. There is a copper-pole capacitor inside, which can transmit electricity to any location in the room. Researchers charge mobile phones, toys and desk lamps, but Disney Research has no short-term business plan. Alanson Sample, chief research scientist and deputy director of the laboratory at Disney Research, said: “In some respects, what really needs to be weighed is how much power the device can get under safe conditions and how wide you can move freely.” In addition, Energies, another wireless charger technology manufacturer, is pushing WattUp, a long-distance wireless charger technology. Compared with traditional coil technology, Energies’ WattUp technology provides a unique and more extended wireless charger experience.

WattUp uses radio frequency to transmit energy safely in the air, providing a smarter scalable source in a way similar to Wi-Fi routers. And unlike induction or resonant wireless charger systems, WattUp can transmit electricity from any direction to multiple devices over a long distance. At the same time, WattUp’s small antenna uses existing printed circuit boards, eliminating the need for larger and more expensive coils for today’s competitive solutions. This will accelerate the application of wireless charger technology and spread to a wider range of battery power supply devices, including smartphones, tablets, Internet of Things devices, small wearable devices and virtual reality (VR)/augmented reality (AR) devices.

According to data previously disclosed by Energies, the overall efficiency can reach 50% when the transmitter (smaller size and optimized antenna) and the receiver are in direct contact. In the range of 1.5-2.5 meters, the efficiency can also reach 10% to 15%. However, Energies does not develop its own terminal devices, but hopes to cooperate with consumer electronics and home equipment manufacturers and integrate their technologies.