The days of using wires and cords to charge your electronic devices are long gone. The use of wireless chargers for charging electrical appliances has grown in popularity for more than a century. But nowadays, there are several wireless charging technologies that eliminate the need for wires for a variety of devices, including mobile phones, wearable smart devices, computers, home appliances, and cars. These days, wireless phone charging is extremely widespread. It is a technology that has advanced significantly in order to create a large ecosystem of various wireless charging devices outside of simply our smartphones. These may be utilized in both public places of business and private residences. Wireless phone charging offers advantages that are obvious, but it also has drawbacks. Therefore, it would be wise to be aware of the advantages and disadvantages of wireless charging if you want to make the move.
Additionally, you should be familiar with how wireless chargers operate before reading further. Wireless charging offers several benefits over conventional chargers since it does not need cords or connections. We need "smart chargers" to power our "smartphones" in this rapidly becoming "smart world."
The market for wireless charging produced around $4 billion in sales in 2020, and it is anticipated to expand significantly over the next several years (2021–2030). The key reasons propelling the market's growth are the acceptance of wireless charging methodology in therapeutic equipment of the medical field, the development of the EV industry, and the surge in the growth of mobile charging in smartphones and other consumer devices. Wireless charging industry expansion was negatively impacted by the COVID-19 epidemic. The manufacture of consumer electronics, medical equipment, and electric vehicle firms' manufacturing facilities was suspended, which restrained the market's expansion for wireless charging. However, after the COVID-19 crisis, the market is anticipated to expand once again.
The global market for wireless charging, which was estimated at six billion dollars in the year 2018 by Allied Market Research, is projected to expand to as huge as 41 billion dollars by 2027, thus growing at a phenomenal 22% annually. North America dominates the world when it comes to the use of wireless chargers, with about 19% of the global wireless chargers based out of the United States of America alone. India, being one of the fastest growing economies, is only now waking up to the benefits of wireless chargers, and manufacturing electronic devices such as mobile phones that can be charged with wireless phone chargers. They are finding takers in the domestic segment and as chargers inside the cars. However, one must ensure that the mobile phone should have the relevant hardware or be compatible with specific wireless charging.
Benefits of Wireless Charging:
You won't ever have to bother with cables again, which is the main advantage of wireless charging. It eliminates the need for unsightly wires and simplifies things considerably by allowing you to just drop your phone off at the station for charging.
One of the finest features of certain chargers is their ability to work with almost all mobile phones, regardless of the size or form of their charging sockets.
3. Charging of Many Devices:
We might be using many cell phones in the same space now. The chargers for most smartphones are often the same, although there may still be a difference between Apple and Android devices. You may use a wireless charging station to power many devices at once. You can charge numerous devices at once, including tablets, computers, and other gadgets, in addition to your cell phones.
Drawbacks to Wireless Phone Charging
Wireless charging offers advantages, but we are aware that it is still far from ideal. Before choosing it, customers must be aware of its downsides.
The fact that wireless charging is still less efficient than conventional mobile chargers is one of the reasons why it has not been completely incorporated. Certain wireless chargers just can't compete with conventional ones in terms of efficiency, which might slow down the charging process.
Even though the same charging stations may be used for a variety of devices, some users have reported a problem. There have been instances when consumers claim to have had issues while trying to charge various gadgets.
Also Read: Portable Phone Chargers Business Startup Guide & Ideas
Technology For Wireless Charging: Types and Function
Wireless charging can be accomplished between the source to load, using any of the three techniques mentioned below.
Radio Frequency Charging
A mixture of small batteries is used in this charging process. This method is suitable only for a limited power range, for applications such as a wireless mouse, wireless media gadgets, ear aids, etc. These devices make use of radio frequency waves to transmit and receive wireless communications. In this method, radio waves are produced by connecting the transmitter to a socket. In order to charge the device, frequency matching between the transmitter and receiver must be done.
Near-Field Charging OR Inductive Charging
The electromagnetic induction concept is used in this charging method. The concept is very simple. When a current is passed through a coil (inductor), it produces a magnetic field around it, and this magnetic field stores energy. When another conductor is placed in the vicinity of the field, then electromotive force is generated across it and current flows through it. Thus, this current will charge the battery. This is the backbone of the Qi wireless charging protocol, which is discussed later.
Resonant Method Charging
Devices that demand a lot of power often use resonance charging, which is a fundamentally different kind of charging method. These techniques are used in large computers, electric cars, robotics, and vacuum cleaners. This is suitable only for short distances between the source and load. Here, a copper coil is electromagnetically coupled with another such coil, at the same resonant frequency. The power source may be used to quickly charge a mobile device's battery. Over short distances, wireless resonance charging is only practical.
Standards For Wireless Charging
The Qi standard happens to be the most popular standard for wireless charging. It uses the NFC (Near Field Charging method). Thus, two coils are magnetically linked and electrical energy is transferred from the source to the load. However, this is valid only when the distance between the charger and the device is less than 4 centimeters. All major wireless charger manufacturers having their own brand of mobile phones, like Samsung, Apple, and Motorola use this standard. However, it is only suitable for power ratings of around 100-120 watts, and energy transfer happens at a frequency of 110 kHz and more. This standard is mostly used in speakers, household robots, laptop computers, mobile phone chargers, and infrastructure charges.
Ki Wireless Kitchen Charging Standard
The Ki cordless kitchen standard was introduced in 2019 by the Wireless Power Consortium (WPC). This standard is applicable to cordless kitchen appliances, such as kettles, and other heating devices, that need up to 2.2kW of power. These electrical kitchen appliances are charged using inductive charging means.
This is suitable for charging the batteries of electric vehicles on the go. The standards are still being tested, and promising results have been obtained. The SAE calls this technology WPT or Wireless Power Transfer. Wireless car chargers are used to charge the lithium-ion batteries of electric vehicles, while the car is on the move. Resonant inductive coupling is employed as the system's charging technique. The chargers have yielded an efficiency of 94% when the gap between the charger plates and the car battery is less than 20 cm.
By doing away with the inconveniences of electrical corded charging, the wireless charging method enables you to charge your smartphone and other compatible devices wirelessly. In smart homes, wireless power transmission is a safer alternative to wires since people and animals may trip over them. It has also been found that wireless charging is quicker. Using the best wireless chargers will enable the charging of many electronic devices at the same time, and make life easier. However, more research on the biological effects of such wireless charging needs to be done.
FAQs: Wireless Charging
Q. Can wireless charging be used to charge any phone?
Ans. No, for mobile phones to be charged wirelessly, they need to be compatible with Qi standards. Generally, NFC (near field Charging) which is an inductive charging method, is used to charge phones wirelessly.
Q. Are wireless chargers superior to plug-in chargers?
Ans. One cannot reach that conclusion unless efficiency testing is done. However, wireless chargers do away with cords and it makes for an aesthetically pleasing charging experience.
Q. Do wireless chargers damage batteries?
Ans. No, they do not! Not all phones or EV batteries can be charged wirelessly. The devices must be compatible with wireless charging.
Q. Can you charge your phone wirelessly overnight?
Ans. Of course, you can! Wireless chargers charge the phone, like the way a corded charger does. Once the battery is fully charged, it only uses a trickle charging method to charge, as long as the phone is in the field of the charger.
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