What are the advantages and disadvantages of wireless charging

The benefits of wireless charging: 1. It can reduce the use of data cables and avoid a lot of loss and waste of data cables; 2. The adaptation rate is high, even if mobile phones of different brands use different charging cables, As long as they all support wireless charging, they can all be charged on the same wireless charging pad; 3. The interface has better durability. Disadvantages: 1. The distance is too small, it is just a transitional technology; 2. You cannot play with your phone while charging; 3. The charging efficiency is low; 4. The price is more expensive; 5. Battery loss, because the heat generated during wireless charging will be relatively high. Therefore, wireless charging actually causes greater losses to the battery.

#The operating environment of this tutorial: IOS15 system, iphone13 mobile phone.

Wireless charging technology (Wireless charging technology; Wireless charge technology), derived from wireless power transmission technology, can be divided into two methods: low-power wireless charging and high-power wireless charging.

Low-power wireless charging often uses electromagnetic induction, such as the Qi method for charging mobile phones, but ZTE’s wireless charging method for electric vehicles uses induction. High-power wireless charging often uses resonant charging (most electric vehicles use this method). The power supply equipment (charger) transmits energy to the electrical device. The device uses the received energy to charge the battery and at the same time supply itself. For operational purposes.

Benefits of wireless charging

1. Reduce loss

As we all know, when using wireless charging, you only need to connect the wireless charging board to the power source first, and then Devices that support wireless charging can be placed on the wireless charging pad. Although wireless charging still requires connection to a power source, it can reduce the use of data cables and avoid a large amount of loss and waste of data cables. It is a relatively environmentally friendly charging method.

2. High adaptation rate

Since the data cables used by different brands of mobile phones are not universal, such as Huawei and Apple, Huawei uses Type-C, while Apple uses It's lightning, and the two cannot be mixed. And if you are using wireless charging, even if you are not using the same charging cable, as long as they both support wireless charging, they can be charged on the same wireless charging pad.

3. More convenient to use

Wireless charging mobile phones on the market mainly use the principle of electromagnetic induction to achieve wireless charging. There is no interface between the charger and the phone. The mobile phone has a built-in receiving coil, and the charger has a built-in transmitting coil. They charge the power into the mobile phone through electromagnetic induction. No matter what brand of mobile phone you buy, as long as it is compatible with the wireless charging standard of the charging head, it can basically be charged. In wired charging, the Android camp generally uses the USB-C interface, and Apple has its own interface.

4. The interface has better durability

Wireless charging of mobile phones does not require frequent plugging and unplugging of charging cables, so the wear and tear of the data interface of the mobile phone will be reduced a lot. At the same time, the wireless charging coil of mobile phones is not exposed to the air, which can also reduce oxidation corrosion of the charging unit. For wired charging, frequent plugging and unplugging can easily lead to wear and tear, and the exposed interface is prone to oxidation and corrosion.

Disadvantages of wireless charging

Although wireless charging has many advantages, in actual use, it is also found that there are many shortcoming. Compared with wired charging, wireless charging mainly has the following disadvantages.

1. The distance is too small, just a transitional technology

Because the magnetic field attenuates quickly in the air, the distance of current wireless charging technology for mobile phones is generally very small, and the effective charging distance is generally only 3- 8mm. Charger, mobile phone case, and the thickness of the mobile phone protective case. The mobile phone charging must be close to the charger for effective wireless charging. This limitation determines that this wireless charging technology is only a transitional state. The real wireless charging technology must develop in the direction of "air charging". If it matures, air charging will completely replace wired charging.

2. You cannot play with your phone while charging

Most of the wireless chargers for mobile phones on the market today are laid flat, and the phone must be charged close to device. In this charging position, it is basically impossible to play with the phone, and you have to use headphones to connect and listen to the phone. Even if Xiaomi builds a vertical wireless charger, it won't be able to change this situation. Wired charging, although tied to a wire, can move freely within the length of the wire.

3. Low charging efficiency

Although wireless charging can be done without plugging in the wire, the distance between the mobile phone and the charger is very small. However, the electromagnetic energy lost is still quite large. Generally, the power received by the mobile phone is about 75% of the power sent by the charger. At the same time, wireless charging power is generally relatively low, and wireless chargers on the market are generally 15W. A small number of manufacturers have higher fast charging wireless chargers. There is basically no loss in wired charging, and the charging power is generally 40 to 50 watts of fast charging, and some manufacturers even have fast charging that exceeds 100 watts.

4. The price is more expensive

Compared with wired charging for mobile phone wireless charging, both the charging head and the mobile phone need to add charging coils and related protection circuits. High-frequency wave circuits are also required to meet electromagnetic compatibility, so the overall price is higher than traditional wired charging.

5. Battery loss

Compared with wired charging, because the heat generated during wireless charging will be relatively high, wireless charging will actually cause slightly greater battery loss.

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