Meet wireless charging technology

The principle of wireless charging technology:
Wireless charge (Wireless charge), also known as inductive charging, non-contact inductive charging, is a device that uses near-field sensing, that is, inductive coupling, to transfer energy to a powered device by a power supply device (charger), which uses receiving The energy that is received charges the battery and is used for its own operation. Since the charger and the electric device transmit energy by inductive coupling, there is no wire connection between the two, so the charger and the electric device can be exposed without conductive contacts.
Wireless charging technology has entered the eyes of consumers since 2010. In 2011, many Japanese manufacturers took the lead in demonstrating their wireless charging technology-related commercial devices, and in the second half of 2011, some consumer electronics manufacturers began to use them for portable devices such as smart phones. The charging application gradually began to enter the masses of the world. According to a report by market research firm Marketsand Markets, the global wireless charging market will grow spurt in the next five years, and will form a market of more than $7 billion by 2017, compared with only $457 million in 2011. The compound annual growth rate is expected to be 57.6%.
Future wireless charging technologies will allow all mobile devices to be embedded in built-in receivers and transmitters that are ubiquitously deployed in public areas such as cafes, hotels, airports, fast food restaurants, and more. Consumer electronics is an obvious target market, but medical and industrial portable devices are also an application segment that can benefit from wireless power, enabling waterproof enclosures and reducing charging ports, which are often used due to repeated insertion of charging lines. Can cause unnecessary malfunctions.
Advantages and disadvantages of wireless charging technology:
advantage:
  1. Safety: No power contact design to avoid the risk of electric shock.
  2. Durable: The power transmission element is not exposed, so it will not be eroded by moisture, oxygen, etc. in the air; there is no contact, so there is no loss caused by mechanical wear and flashover during connection and separation.
  3. In making the medical implant device safer: on the embedded medical device, the medical device implanted in the human body can be charged without damaging the body tissue without wires passing through the skin and other autologous tissues. To avoid the risk of infection.
  4. Convenient: no need to connect with wires when charging, just put it near the charger. Technically, one charger can input power to a plurality of electric devices, and in the case of multiple electric devices, multiple chargers can be omitted, no need to occupy multiple power sockets, and no wires are entangled with each other. .
Disadvantages:
  1. Inefficiency: Energy storage efficiency is not as good as real contact.
  2. Slow charging speed: Due to low efficiency, the charging speed is slower at the same input power.
  3. The cost is high: the charger needs to have an electronic circuit that pushes the coil, and the electrical device needs to have an electronic device for power exchange, and both need a coil, so the cost is higher than direct contact.
  4. Can't charge while moving: This problem only occurs on mobile devices. For example, the electric shaver cannot be removed from the charger when charging. If the battery in the electric shaver is just completely used, the electric shaver cannot be used. On the contrary, the traditional design of the wire connection can be continued with the wire connected to the charger.
  5. Low compatibility: Different brands of wireless charging devices cannot be used interchangeably because there is no uniform standard. In recent years, the industry organization Qi has begun to implement standardization, and the outlook is expected to reach the standard.

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