Car wireless charger requires mobile phone to support wireless charging function to use. Such as Samsung Galaxy S SONY Xperia Z4v, Google Nexus MOTOROLA Droid Turbo, One plus 9 pro, Mi MIX Mi Mix 2S, Honor Magic 3 Pro, OPPO Find X3 Pro, Nut R1 and so on. A new version of iPhone is coming outThe series basically supports wireless charging. If the mobile phone does not support, like Apple, Huawei mobile phone can be.
In addition to charging for Mi MIX2S, Mi car wireless charger can also be compatible with mobile devices that meet the Qi wireless charging standard, including iPhoneX, Samsung GalayS9 and other mobile phones. StrategyAnalytics released the global smartphone manufacturer shipment and market share report in the second quarter of 2017, showing that Xiaomi shipped 23.2 million units and reached 4% market share, returning to the world's top five.
Wireless car chargingIt is not suitable for all phones, only those that support wireless charging. The power of wireless chargers varies from car to car. Now car chargers are using QI protocol. Mobile phones and car chargers that must comply with the protocol can be matched for charging. A charger that is not suitable for your phone's power can damage your phone's battery. Wireless charging technology originated from wireless power transmission technology.
Car wireless charging is suitable for most mobile phones with wireless charging configuration on the market; For example, Huawei Mate RS, Mate20 Pro/RS, P30/P30 Pro, Mi 9/Mix2S/3, etc., most of Samsung
Large loss, unstable. According to the query data official website display. The loss is large, and the high frequency of electricity is more easily converted into heat, which can not be charged to the mobile phone battery in time, resulting in waste. Unstable, high frequency electricity can not control the accuracy and control system to achieve stable power transmission, instability will cause the service life of the mobile phone to be shortened.
Fixed frequency is better. The working principle of the frequency conversion architecture is to adjust the transmission power by changing the operating frequency, which will cause certain interference to the mobile phone circuit in some transmission bands, and the fixed frequency does not appear this problem.
Because wireless charging now works at frequencies all doneIt's under 1 Megabyte, so it won't affect your phone's signal. On the contrary, wireless chargers not only reduce the use of data cables, but also make charging methods more free and safer. It is basically the same as wired charging, but the rate is lower, but the wireless charger still has a high energy conversion rate, which saves energy consumption more.
The frequency band of wireless charging refers to the frequency range within a certain range occupied by electromagnetic waves when they propagate in space. The choice of this frequency band is closely related to the propagation characteristics of electromagnetic waves, and different frequency bands have different transmission distances and penetration capabilities. Frequency band has a greater impact on wireless charging, different frequency bandsIt can be used for different types of wireless charging technology, such as near-field wireless charging, far-field wireless charging, etc.
Magnetic field induction principle: wireless charging uses the magnetic field induction principle, the frequency of the transmitting coil and the receiving coil is different, which will produce insufficient or excessive electromagnetic coupling, thus affecting the transmission efficiency of power. Resonance effect: In wireless charging, the magnetic field between the transmitting coil and the receiving coil will cause a resonance effect, and the power transmission efficiency is highest when the resonant frequency matches.
Wireless charger under normal circumstances will not harm the mobile phone, wireless charging now the working frequency is less than 1M,So it won't affect the cell phone signal.
1. Disadvantages are as follows: low efficiency. At present, wireless charging technology is not mature, many problems have not been solved, and the efficiency of energy storage and transmission is less than that of wired charging; Charging speed is slow. Due to low efficiency, the charging speed is slow under the same input power; The cost is high. Wireless charging has high technical content, consumes more manpower and material resources, and the corresponding manufacturing cost is also relatively high; Low compatibility.
2, low compatibility:Different brands of wireless charging devices because there is no uniform standard, so can not be used. Large size: In general, the wireless charger base is larger and heavier than the wired charger, and if you travel or travel, the wired charger is obviously more convenient. Can not play with the phone when charging: Most of the mobile phone wireless chargers on the market are flat, and the phone must be close to the charger.
3, low charging efficiency: compared with wired charging, wireless charging efficiency is low. That means it takes longer for users to fully charge. In addition, wireless charging requires energy conversion between transmission and receptionTherefore, the battery life may be shortened. Slow charging speed: Due to the low efficiency of wireless charging, the charging speed is relatively slow. This causes users to have to wait longer to complete the charge.
Wireless charging of Apple mobile phones uses the principle of electromagnetic induction. What is the principle of wireless charging for Apple mobile phones? The principle of wireless charging technology is actually the principle of electromagnetic induction. The babies who have learned high school physics, I believe everyone is very clearThe electromagnetic wave has energy, can be obtained through the electromagnetic coil, and then the coil will form a current, and finally through the integration of the circuit can be charged.
The iPhone has adopted the latest wireless charging technology, which relies on the principle of inductive coupling, that is, the transmission of power through the alternating magnetic field generated between the coils. Magnetic resonance builds a bridge of energy transmission between the charger and the device, and the coil and capacitor work together to form resonance and realize wireless charging. While enjoying the convenience of wireless charging, users need to pay attention to some things.
Technical principle Apple charges two mobile phones back to backThe technical principle is the use of wireless charging technology. When two iphones are placed back to back together, a magnetic induction coupling is established between them, enabling wireless charging. The technology requires both iphones to support wireless charging and not be too far apart. The advantage of Apple's two mobile phones back-to-back charging is convenient and fast.
Apple mobile phone wireless charging technology uses the principle of magnetic induction, through electromagnetic induction to transfer the current to the charging board and the phone, in this process, the electromagnetic field will produce a small heat to the radio components inside the phone, but this heat is very small, noEnough to cause damage to the battery.
The above is the schematic diagram, the principle used is the principle of electromagnetic induction.
Second, when using wireless chargers, if the device is not properly aligned with the charging pad or the charging distance is too far, the charging efficiency may be reduced, and frequent interruptions during the charging process will also cause additional burdens on the battery. Frequent charging interruptions may cause the battery to constantly re-enter the charging state, which will accelerate battery depletion in the long run. Also, the quality of wireless chargers on the marketDifferent. Most models do not support wireless charging because of the technology and cost of wireless charging, generally low-end models do not support wireless charging, only those high-end flagships have wireless charging function. This means that only users who can afford high-end flagship have the opportunity to use wireless charging, the target group is limited, and it is still a relatively small part of the market, which cannot be popularized.
Some use accessories without certified chargers or housings installed on the phone may cause interference with the charging case, resulting in slow charging or inefficient charging. In addition, long-term use of wireless charging is possibleThe battery temperature is too high, which reduces the battery life. In order to avoid this problem, it is recommended to choose brand certified chargers and housings, and properly control the use time and frequency of wireless charging.
Wireless charging itself will not cause damage to the battery, but the charging temperature is too high or too low and the charger material and other factors will have an impact, so it is recommended to use a regular genuine charger, and avoid a long time of fast charging. Wireless charging is a short-range wireless charging technology, compared with traditional wired charging, it converts electromagnetic energy into electricity and transmits it directly to the receiver, so that the phone does not need to be connectedConnect the charging cable to achieve the purpose of charging.
1, wireless charging benefits: first: reduce loss. As we all know, when using wireless charging, you only need to connect the wireless charging board to the power supply, and then place the device that supports wireless charging on the wireless charging board. Although wireless charging still needs to be connected to the power supply, it can reduce the use of data lines and avoid a large amount of loss and waste of data lines, which is relatively an environmentally friendly charging method. Two: high adaptation rate.
2, wireless charging is goodThere are: reduce the loss, high adaptation rate, the disadvantages are: the distance is too small, only the transition technology; The benefits of wireless charging reduce the loss. As we all know, when using wireless charging, you only need to connect the wireless charging board to the power supply first, and then place the device that supports wireless charging on the wireless charging board.
3, mobile phone wireless charging has the advantages of convenience, flexibility, protection interface, the harm is low charging efficiency, slow charging speed, high cost. Benefits Convenience: Wireless charging of mobile phones eliminates the hassle of using a charging cable. The user only needs to place the phone on the charging dock, noneYou need to plug and remove the charging cable to start charging. This makes the charging process easier and faster. Flexibility: Wireless charging eliminates the need for a specific charging cable.
4, the benefits and disadvantages of wireless charging: Benefits: Lightning cable wear is reduced. On the other hand, the popularity of wireless charging for iphones will reduce the use of cables. The wear on the cable will be reduced to almost zero. Just plug the wireless charger AirPower into the power supply, and everything will be fine. Users no longer need to plug in and pull out the phone frequently, reducing the wear and tear between the Lightning cable and the interface; partyEasy, especially when charging multiple devices.