European Union report:
Since the beginning of this year, with the black technology of the iPhone8, the "wireless charging" technology has received much attention from all walks of life. In fact, this black technology was pushed to the forefront of the technology trend at the beginning of its launch. After a period of experience, many users are disappointed with this technology because it does not lead to a better charging experience.
In fact, wireless charging is not as convenient as wired charging, because most wireless charging requires additional equipment. In other words, you still have to plug in a receiver on your phone. It is worth noting that there are three types of wireless charging available on the market.
Magnetic induction wireless charging
As far as the current situation is concerned, the most common wireless charging technology on the market is magnetic induction wireless charging. The principle of magnetic induction corresponds to the electromagnetics in theory, which has a history of more than one hundred years. As early as 2009, the Palm Pre phone began to use magnetic induction wireless charging technology. It is understood that Palm has been in the PDA field for a while, but with the rise of other smart phone brands, it has gradually weakened. Even so, Palm's technical breakthroughs on this phone still make people amazed. Although it is a wireless charging technology, it still cannot get rid of the constraints of other accessories. It is reported that the Palm Pre needs to be equipped with a wireless charger called "Touchstone" to achieve wireless charging.
Since then, other mobile phone brands have followed the trend and introduced similar charging technologies. Such as Nokia Lumia 920, Samsung S8 and so on. In addition to the inconvenience of requiring accessories, this charging technology still has a big problem - the charging rate is slow. Some users have reported that a mobile phone with a battery capacity of about 3000mAh is filled with wired fast charging technology for about an hour, and it takes more than three hours to use the latest wireless charger. This is another major reason why wireless charging has not caught on.
Magnetic resonance wireless charging
In essence, magnetic resonance wireless charging technology is still based on magnetic induction technology. However, the wireless charger of this technology has better coil coupling than the magnetic induction wireless charging technology mentioned before. Not only that, but the magnetic resonance wireless charging technology has more power and a longer charging distance. When the mobile phone is charging, the degree of freedom in placement is greater, and multiple mobile phones can be simultaneously charged.
It is worth noting that the power of the charging base required for magnetic resonance wireless charging is much larger than that of the mobile phone, so in general, the base of such wireless charging devices is generally large. Due to the high power and long transmission distance, this base can be hidden under the table. The phone can be charged separately, that is, the phone can be charged as long as it is placed on the table.
Recently, a company called Wi-Charge has developed a new wireless charging device that can support mobile phones and tablets within 10 meters compared to the current wireless charging devices on the market. The computer is charged, no need to check the charger by the mobile phone, and no need to contact the device. This is very likely to use magnetic resonance wireless charging technology.
Electromagnetic wave wireless charging
Compared with the above two wireless charging technologies, electromagnetic wave wireless charging technology is the most in line with people's imagination of black technology. It works by receiving energy like receiving a wireless signal and then charging the phone. In fact, in order to achieve electromagnetic wave charging, the power requirement of the transmitting device is very large because the problem of long-distance energy divergence is solved. Of course, whether this kind of high-power electromagnetic wave will cause harm to the human body is still uncertain.
In summary, there are still many shortcomings in wireless charging technology. As for whether the future wireless charging technology can achieve technological breakthroughs, or whether the future wireless charging technology can be widely used, let us wait and see!