How wireless phone charging works: It's not magic. Wireless charger for smartphone - how to use? Wireless charging capability
It doesn't take much to equip your favorite smartphone with flagship wireless charging.
Firstly, the base, it is also a charger. Most often it is made in the form of a small round platform with an outlet for the charger. For the experiment, let's take an unnamed model with a nice blue backlight. Powered by a 5 V, 2 A power supply (regular USB), powered through a standard microUSB port. At the output, the device gives a current with parameters of 5 V, 1 A, which is enough to charge most devices even in operating mode.
The second necessary element of modernization is an antenna, with the help of which the smartphone is charged at a distance. Usually the distance is minimal, by the way, but the convenience of using it without wires can be significant for someone. For example, the base can be built into the dashboard of a car or put on a chest of drawers near the bed: you came, put it down, went to bed. And no searching for wires.
There are a lot of different universal antennas for smartphones on the market. They are suitable for other equipment, but here you need to think about placement. The antenna (we have an unnamed Chinese copy) is a coil with a board hidden in a paper-like envelope. A wire with a microUSB plug comes out of it, although you can solder it to any other if you wish. It is worth paying attention: the coil works only in one position in relation to the charger. Since the cable for connecting to a smartphone is flat, it may be necessary to open the bag and turn the coil over for the antenna to work (as in our case). The coil should be directed with the open side towards the charger.
Attention: the required parameters of the power supply are indicated on the charging base (in the case of a used one - 5 V, 2 A). They need to be provided. With less current, charging will be very slow. It may be necessary to replace the cord from the charger kit for adequate operation, since not every USB cable can pass a full 2 A through itself. As you can see,
how to charge Galaxy S7 and S7 edge faster on wireless charging [updated 04/03/2016]
Wireless Qi chargers, for the most part, output a standard 1 ampere of load (voltage 5 volts).
However, smartphones are already equipped with built-in charging systems that can accept a large load (up to 1.4 amperes, according to Samsung), so they can charge from a wireless charger one and a half times faster than other smartphones.
However, only on the condition that they will be connected to the so-called, that is, one that is capable of providing an output of 1.4 amperes. From the usual ampere charging, S7 and S7 edge are also charged at the usual speed.
It is known that Sansung has already begun to produce Wireless Charging Stand models that support such “fast” charging, and in which, by the way, the smartphone is not placed horizontally, but vertically, so that it is much more convenient to use it during charging.
These new Qi-memory devices are already on sale. As for prices, according to preliminary data, the Wireless Charging Stand will retail for about $80.
Here is a short video - for clarity (in the settings you can turn on the translation of subtitles, which "in general terms, understand what the foreigner is talking about"):
What is Qi wireless charging?
In short, "Qi" (that's how the word Qi is pronounced) is the global battery standard for user-grade mobile devices. Qi allows for wireless charging of compatible devices through inductive power transfer. Simply put, you simply place your smartphone on a special transmitter plate without having to connect it to an outlet through a power supply or through a cable to a computer's USB port.
Where is Qi wireless charging used?
Today, this technology, like Wi-Fi, is widely used in hotels, airports, train stations and other public places. In addition, Qi charging is also available in the form of inexpensive and compact devices designed for use at home or in the office. Like EC Technology's ultra-slim wireless charger, which costs $21 on Amazon.
can i use qi?
Yes. If your smartphone supports Qi technology, then any wireless Qi charger will work for you. Moreover, it is not necessary to spend money only on expensive models that are recommended by the manufacturer of your smartphone as an official accessory. Any high-quality Qi charging of the so-called third-party brands will do.
What is the capacity of Qi charging?
The low-power Qi wireless charger is capable of delivering up to 5 watts of power at a distance of up to 4 cm (in theory), and the medium-power model can deliver up to 120 watts. In practice, the mentioned EC Technology Qi charger can charge the Nokia Lumia 735 smartphone, which is located no more than 2 cm above the transmitter. Therefore, the best option is when both devices are in direct contact with each other.
How fast can wireless Qi charging charge a smartphone or tablet battery?
As a rule, smartphones, and even more so tablets, charge much more slowly through a wireless Qi-charger than through conventional chargers. For example, Qi charging EC Technology supports a current of 1A, which is enough to recharge a smartphone battery at a normal pace, but not enough to quickly charge the battery of a Nexus 7 tablet, whose standard charger gives out 2A.
Qi wireless charging: how to use it?
Step 1 . We plug Qi charging into a socket (yes, it charges wirelessly, but it works from the mains) or connect it to a USB port (EC Technology has a USB cable included in the package) of a computer, tablet or external mobile battery.
Step 2 . To begin with, we check once again whether our smartphone (or tablet) supports Qi wireless charging technology. The data can be found in the model specification. For smartphones with removable back panels, Qi elements can be seen on the back of the cover. In addition, some manufacturers release Qi adapters for models that do not natively support Qi charging. For example, for its Galaxy S4, Samsung has developed a Qi back cover that can be installed in place of the usual one.
Step 3 . Just put your smartphone on the wireless charging pad. You will feel how it starts to vibrate, and you will see how the color of the indicator light changes - it means that the battery has begun to charge. Upon completion of the procedure, we take the smartphone from the panel.
the back panel of the Nokia Lumia 735 smartphone with elements of the Qi system
Actually, this is how wireless Qi charging works. For the average user of course
Wireless charging technology has existed for several years before the release of the first mobile devices with its support, but it was with the release of the Nokia Lumia 920 and Lumia 820 winphones that this technology began to become widespread.
More and more smartphones are getting wireless charging technology, especially flagship models. All that is needed to charge such devices is to place them on a special panel with their back cover. No wires needed. You don't even need to press any buttons. Charging starts and ends automatically.
Why do you need wireless charging?
In addition to the fact that wireless charging is convenient in itself, using it allows you to extend the life of the power connector. In addition, such a device may be the only normal way to charge a smartphone if its connector is already broken. Of the minuses of the technology is a slightly longer time for the charging process.
How does wireless charging work?
The principle of this technology is based on the action of a magnetic field. The smartphone acts as a receiver of this field, and the wireless charging itself - the panel where the device is placed - as a transmitter. The transmitter and receiver are a so-called magnetic coil. The diagram below shows the basic method of transmitting electricity through a magnetic field.
The magnetic field is formed by the transmitter coil located on the charging panel, and the receiver coil located in the smartphone receives it, converts it into electricity and thus charges the battery.
How to charge your smartphone wirelessly?
Typically, wireless charging is not included with mobile devices and must be purchased separately. Therefore, first of all, when purchasing such a charger, you need to make sure that it is suitable for a particular model. All modern smartphones with wireless charging function use the international Qi standard, which means that the charger you buy must also be labeled accordingly.
It is important to properly stow your smartphone during wireless charging. It must be placed on the panel as indicated in the device instructions. There should not be any foreign objects between the cover and the battery of the smartphone. At the same time, if an additional removable socket is installed on the smartphone, it is not necessary to remove it for wireless charging: the induction range is 1 centimeter.
Only one device can be charged per wireless charging pad. To charge two or more models, there are special panels with two built-in magnetic field transmitters.
There is a rumor that you can not use your smartphone during wireless charging. This is not true. There are no restrictions on the use of mobile in this case.
How do I know if my smartphone supports wireless charging?
Very simple. Firstly, support for such a function is stated in the instructions for the device. Another way to check if a smartphone supports over-the-air charging is to look at the inside of its cover: if the cover has several contacts in the area where the battery is located, then this technology is supported. This is what these contacts look like on the cover of the Lumia 820:
The telecoil cover next to the regular cover for Lumia 820:
Your vinfon does not support wireless charging, but would you like it to have such a function? No problem. You can now add wireless charging to absolutely any mobile device with a microUSB connector (as well as iPhones and Samsungs with their universal connectors). In this case, in addition to buying the wireless charging pad itself, you need to buy a wireless coil receiver:
The receiver fits under the cover of the device and connects to the power port. In online stores, it is sold for 300 - 500 rubles, depending on the power. The more power, the faster the charge will go.
The aesthetics of the smartphone in the case of such an upgrade, as you can see in the photo, will suffer in a certain way, but those who know how to use a soldering iron, instead of directly connecting the receiver to the microUSB port, can solder the receiver directly to the inside of the device. Instructions on how to add wireless charging to your smartphone can be found on the Internet.
Wireless charging is far from a new technology. We have toothbrushes that charge via wireless charging and a lot of other things that are not surprising to charge in this way.
Now that the limits on size, cost and efficiency have been reduced to a critical level, installing wireless charging in a smartphone or smartwatch makes more and more sense.
People often ask questions about wireless charging and how it works, so let's talk about the basic principles: what it is, how it works, and why you should have wireless charging in your next smartphone. Go!
What is wireless charging?
Wireless charging in smartphones is not magic, because you still need a wire for it to work. But the difference here is that the wire is connected to the charging base instead of your smartphone, so you can just put it on the charger and everything will work by itself without connecting the wires directly to the smartphone or watch.
The wireless charging base can be of almost any shape or size. A good example is wireless charging on a desktop. When you're not using your phone, you place it on the wireless charging pad. When you need it, pick it up and it's already charged.
At the moment, wireless charging is not as fast as wired fast charging (read our long post on fast charging), but it is very easy to use. In this sense, it is unrivaled.
How does wireless charging work?
Let's try to explain this magic so that everyone can understand. Although there are a lot of interesting technical questions to discuss and they should be on specialized forums, we will try to explain simply and clearly.
Wireless charging uses two resonant inductive connections to transmit low power signals between two devices. They are specially designed to transmit electricity without touching each other, as a conventional wired connection does.
The wireless charging base station has a transmitter coil, and your phone has a receiver coil (pictured above). The pad regularly sends out a signal, and when the receiver coil is close enough, the signal resonates. The signal is then modulated and starts inductive charger.
Inductive charging (Qi) uses these two specially designed electromagnetic coils to create a magnetic field between two devices. There is a complex process that allows a magnetic field to generate electricity through potential differences and oscillations.
The coil on your Android smartphone is also connected to the battery charging circuit and your battery is charged using the energy caused by the magnetic field.
Inductive charging (Qi) creates excess heat, which is why wireless charging is not the most efficient way to transfer power from a wall outlet to your battery.
This is also because it takes longer to charge the phone than when plugged into a power outlet. While new methods and materials use higher frequencies and thinner coils than previous versions, wireless charging is still less efficient and more expensive than standard wired charging. This difference will continue for the foreseeable future.
Let's summarize:
- Your Qi-enabled smartphone and charger have special electrical coils.
- When two coils approach, they use electromagnetism to send a small amount of energy across the distance between them.
- This power travels through the charging circuit in your phone and charges the battery.
- It costs more and takes longer than if you plug your phone into a wall outlet because it's less efficient.
Where is wireless charging?
Companies such as AT&T and Starbucks provide wireless charging base stations in public areas. With wireless charging in your smartphone, this becomes very convenient.
There are also built-in wireless charging bases in many popular cars. However, in recent years this trend has begun to decline. But things could change dramatically if the future gets support for wireless charging.
IKEA furniture with support for wireless charging is also widely known.
Why do I need wireless charging in my next smartphone?
It is important to understand that any Qi wireless charger will work with any device that is Qi certified. This means that the charger you buy, whether it's a $100 Chinese block from Ali or a brand like Samsung or Zens, will work with the device you have now and any devices you buy in the future. .
Until you buy Qi chargers and put them in places where you're likely to put your phone, you won't really understand how convenient it is.
I have a Qi charger on my desk, on the table next to my living room chair, in my car, and on my nightstand. My Nexus 6 almost never had less than 50% charge. Not because the battery life on the Nexus 6 was great, or because Qi chargers work "better", but because when it wasn't in my hand, it charged.
Of course, you need to buy charging bases, but they are quite cheap. Approximately the same price as for a good power supply and USB cable. As more and more devices move towards the Qi standard, more devices will be able to use these chargers.
In 2017, only Samsung among the A-brands is not shy about using wireless charging in its flagships.
Wireless charging doesn't make your smartphone work any differently, but it can drastically change your comfort level. It remains to wait for the moment when all the major players in the smartphone market finally begin to install support for Qi wireless charging.
WirelessChargerWireless Charger Fantasy Qi Standard
Smartphones and tablets make life easier for a modern person, but at the most inopportune moment, equipment can be discharged, or even worse, the port for connecting to the mains can break. But when the Wireless Charger Fantasy appeared, users were able to avoid these troubles. Energy is supplied to the battery wirelessly through a receiver that can be easily attached to your smartphone. When using the Wireless Charger Fantasy, your electronics will not suffer from power surges. Having provided yourself with complete freedom of action, you will no longer depend on sockets and wires.
A smartphone or tablet, in order to charge the battery, is simply placed on a special charging pad. Charging starts automatically and stops as soon as the battery is fully charged. After the battery is charged, the charging pad will stop consuming power and enter standby mode. No more tangled and ever-disappearing wires! In addition, multiple devices can be charged on the charging pad at the same time.
There is only one condition - your devices must support the Qi standard, that is, have a built-in receiver for the wireless signal transmitted by the base. The base, or charging pad, is the primary induction coil.And if not, then no problem! The Qi Wireless Charging Receiver is a thin panel capable of receiving electromagnetic waves and converting them into electricity. This plug-in must be placed between the battery and the back cover of the smartphone, or even between the body of the phone and the bumper or case, and connect a special wire to the Micro USB connector of the phone.
How to use QI wireless charging
1. Connect the USB plug of the charging cable to the power adapter or computer.
2. Connect the micro USB plug of the charging cable to the Micro USB connector of the Fantasy QI wireless charger. The LED indicator in the middle of the circle on the case lights up to indicate the connection.
3. Place your phone on the Fantasy Wireless Charger with the cover side facing up so that the phone is positioned in the charging area of the Wireless Charger. When the phone is charging, the LED indicator lights up automatically to show the charging status.
Advantages:
Ultra-thin stylish design, compact and light weight;
The wireless charging platform is made of high quality plexiglass;
Easy to use - put the phone on the platform to start charging;
The wireless charger allows you to charge your phone without connecting a cable;
Universal wireless charging standard allows you to charge all Qi-enabled devices;
The wireless receiver can be attached to the battery of any phone and works great with any Qi device.
Characteristics:
Wireless charging standard: Qi
Charging ratio: more than 76%
Location: horizontal
Material: plexiglass, plastic
Diameter: 10 cm
Output: 5V/1A
Input: 5V/2A
Weight: 80 g
Equipment:
Wireless charger
qi receiver
USB cable
Package
