The reason why mobile phones can realize wireless charging is achieved by electromagnetic induction, radio waves, magnetic resonance and electric field coupling. Its different ways, based on the relevant principles are not the same, the details are as follows. Electromagnetic induction wireless charging principle of this kindThe line charging method is relatively popular in the current market, and the principle of wireless charging depends on the effective conversion of magnetic energy and electric energy.
Wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, etc. Wireless charging of mobile phones mostly uses the principle of electromagnetic induction. Electromagnetic induction wireless charging, when the current of the power supply through the coil (wireless charger's power supply coil) will generate a magnetic field, other unenergized coil (mobile phone side of the electric coil) close to the magnetic field will generate current, charging the mobile phone. As shown below.
Electric field coupling wireless charging, the principle is throughPower is transmitted through an induced electric field generated by coupling two sets of asymmetric dipoles in a vertical direction. Suitable for short distance charging, high conversion efficiency, the position can not be fixed; However, the disadvantage is that it requires a large volume of equipment and less power.
In general, according to the current wireless charging methods and implementation principles of mobile phones, it is generally classified into three categories, magnetic resonance, electromagnetic induction and radio waves. Now, the most used is electromagnetic induction. Compared with the other two wireless charging methods, electromagnetic induction technology is more mature, and the charging efficiency is higher than other ways, followed by his realizationAnd hardly anyone cares? '> Why was once a very popular mobile phone "wireless charging", but now almost no one?1. First, the charging speed is slower than that of wired charging. Now mobile phones are popular fast charging, 40 or 50 watts, 50 or 60 watts of output power, basically more than half an hour can be charged to more than 80%, which is wireless charging can not be compared. Second, portability and versatility are worse than wired charging. Wired charging can simply take a charger, or even not take it, borrow a colleague or sweep a charging bank to meet the needs.
2, although wireless charging is the future of the handAccording to the current development progress, the charging efficiency of wireless charging is still less than that of wired charging. Coupled with the charging trouble, the cost is too high, so that this once popular charging method has become less popular. But anyway, with the continuous change of technology, I believe that one day wireless charging can solve the problem of low conversion rate.
3, the first is the high price of the mobile phone, the price came to 5000 yuan this price, as an Android mobile phone is still a very big challenge, in addition to the current domestic Huawei mobile phone can come to this echelon, other productsBrand Android phones are generally high or top to touch this price range. So as soon as the price is high, the acceptance of the mobile phone market will decline.
4, Big Cola mobile phone, the brief brilliance of Internet entrepreneurship Ding Xiuhong, an innovator who left NetEase, was inspired by Lei Jun, determined to create Big Cola, trying to copy millet's Internet model. He used online crowdfunding to try to avoid inventory risk and carry out brand promotion. However, his shallow understanding of the supply chain has repeatedly frustrated him in practice, and the rise and fall of Big Coke is like a failed entrepreneurial dream.
5,Do you know all the Internet celebrities who were once very popular but now nobody cares? Let's take stock of it ~ ~ ~ Sharp brother February 23, 2010, because of a post on the Tianya.com forum - "seconds kill the first gorgeous passers-by handsome! Handsome to blind your dog eyes! The details of the human flesh" and quickly became popular, was hailed by netizens as "the best handsome boy", "the most gorgeous passers-by handsome boy", "beggar prince" and so on.
6, Pang Malang with "My Skateboard shoes" became very popular, this song once filled the streets. However, Pang's debut was not well received, and few people attended his concertsThe heat gradually cooled. Buck Teeth Brother and Dazed brother In March 2011, a humorous picture went viral on the Internet, buck teeth brother and Dazed brother exploded overnight on the Internet. Today, little has been heard from the two.
1, due to the heating problem in the electromagnetic conversion process, considering the safety of electricity and other factors, manufacturers do notYou have to not control the power. This is also a reason for the gradual disappearance of wireless charging. After all, wired fast charge has developed to 120W, and the fast charge carried by most mobile phones is more than 60W, which has surpassed the wireless fast charge, so wireless charging has gradually opened the gap with wired fast charge because of the technical requirements of the equipment.
2, charging power limited, charging technology is not interoperable between different brands of the current mobile phone power upgrade quickly, a day to increase a power, from the original 18W fast charge into a variety of fast charge power, 30W, 45W, 65W, and now there are120W super fast charging power, which also leads to the current world of wireless charging board a lot of very mixed, if the wrong choice can not experience the full charging power.
3, in addition to the trouble of charging, wireless charging also has a serious defect, that is, the charging efficiency is too low (early products). There is also a heating problem in the electromagnetic conversion process, taking into account the safety of electricity and other factors, manufacturers have to control the power. 4, because there is a heating problem in the electromagnetic conversion process, taking into account the safety of electricity and other factors, so in 2021, China's Ministry of Industry and Information Technology issued aFor the technical requirements of wireless charging equipment, there are clear provisions: wireless charging rated power shall not exceed 50W. In order to comply with this regulation, manufacturers have to control the power. This is also a reason for the gradual disappearance of wireless charging.
5, that is, the power of the universal charge is particularly large, many people who have used the universal charge know that their mobile phone battery is more and more charged, the more charge is less and less, originally full of 100% can be used for two hours, but to the back, it may only be used for half an hour.
6, the disadvantages of wireless charging efficiency is slightly lower: the general charger alsoThere are transformers, but wireless charging transformers composed of transmitting coils and receiving coils have structural limitations, and the energy transmission efficiency is theoretically slightly lower than that of general chargers. Slow charging speed: Due to the current mobile phone and other receiving devices, most limit the input power, so the charging speed is slow.
Wireless charging opens up a new charging mode for smart phones Mobile phone wireless charging development , getting rid of the traditional charging data lineThe bondage of... Although it will be difficult to shake the status of direct charge in smart phone charging for a while now Mobile phone wireless charge development , I believe that in the future wireless charging will replace direct charge as the mainstream charging method mobile phone wireless charge development , and continuous technical optimization will bring users a perfect experience. If wireless charging is not a fire now, it is estimated that it is difficult to fire up in the future.
Therefore, if the way of wireless charging does not change, it is difficult to increase such users, not to mention the fire.
Nevertheless,As technology advances, wireless charging technology is expected to be improved and popularized in the future. But for now, it is more a preference of a specific group than an inevitable choice of mass demand.
The two main camps, the Wireless Charging Alliance (A4WP) and PMA, have declared mutual compatibility, which means that future wireless charging devices based on these two standards will be able to be compatible with each other's phones, greatly expanding the scope of device adaptation. However, there are no details on how to achieve bidirectional compatibility between the two standards. Broadcom chief technology officer Henry-Samueli pointed out that wireless chargingThe biggest obstacle to the spread of technology is inconsistent standards.
This is also an important reason for the current wireless charging technology has not been popularized, at present can only say that this thing can be achieved, but mass production still needs time. As long as the wireless charging technology can be more mature in the future, making the charging efficiency become faster, and can achieve the charging function of running while charging, then I believe that wireless charging technology will definitely become the preferred configuration technology of new energy vehicles in the future.