1, electromagnetic induction is the most common wireless chargeThe electrical method uses the principle of electromagnetic induction to generate current through the induction of the primary and secondary coils, thereby transferring energy from the transmission end to the receiving end. This approach has been achieved by the Wireless Charging Alliance (Wireless? The Power? Consortium; WPC).
2, if the use is vivo mobile phone, wireless charging is also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, the device that needs to be charged can be charged by contacting the wireless charger after being energized.
3. The three contacts on the side of the X907 body are wireless chargingThe electric connection point can realize wireless charging through a specific charging protective sleeve; There is a receiving circuit in the charging protective case, which is connected with the three contacts of the mobile phone for charging. Wireless charging principle is completed by electromagnetic induction, X907 mobile phone hardware itself is no induction circuit, is through the charging protective cover (receive) and charging base (emission) to complete.
4, wireless charger usage: the mobile phone standard charger and data cable connected to the wireless charger, and then the mobile phone is/horizontally placed in the center position of the wireless charger base, you can achieve wireless charging, the indicator light will have a breathing effect, 5 seconds after extinguishingFast Charge Wireless charging is the future
Charger OEM: The main enterprises include Aohai Technology, BYD Electronics, Tianbao, Selkang and so on. In 2020, fast charging technology enters the era of hundreds of watts. In August 2020, OPPO and Millet new machines are equipped with 120W fast charging, and fast charging technology has officially entered the 100-watt era. According to Xiaomi Lab data, the 100W fast charge takes only 17 minutes to fill the 4000 mAh battery. The increase of fast charge power drives the rapid increase of mobile phone charger prices.
Aohai Technology: wireless charging leader, is aFocus on intelligent terminal charging and storage products research and development, production and sales of national high-tech enterprises. Hengdian Dongmagnetics: one of the largest manufacturers of magnetic materials in China, wireless charging magnetic materials have been adopted by a number of industry-leading customers. Haineng Industry: wireless charging leader, wireless charger is the company's mature products.
Antenna design and manufacturing technology is expected to expand to wireless charging, NFC and other fields: although the company has not launched wireless charging coils, but because of the company's experience in metal precision structure has been precipitated, the company's management has proposed to expand the company's antenna design and manufacturing technologyPlanning in wireless charging, NFC, smart home and other product fields.
Wireless charging technology concept stocks are: Lishun precision, Anjie technology, Goer shares, leading intelligence manufacturing, Xinwei Communication, Changying precision, BYD, Xinwang Da, Pengding Holding, total da electric sound, Huanxu Electronics, Aohai Technology, Hengdian East Magnetic, Zhongshi Technology, Maijie Technology, Fenghua High-tech, Shunluo Electronics, Furong Technology, Haineng Industry and so on.
Wan 'an Technology (002590) : At present, wireless charging products have been produced in small batches abroad, and we will consider landing in China and localizing production in the future. Lisun Precision (002475) : iwatch wireless charging provider; Wireless charging modules will also be available. Genesis (300083) : The company has a wireless charging structure related patents, and is developing wireless charging ceramic battery cover technology.
Jingquanhua (002885) (002885) annual report: Net profit of 55 million yuan, net profit growth rate of 1180.62%, operating income of 11.1 billion yuan. Hengdian Dongmagnetic (002056) annual report: Net profit of 9.7 billion yuan, net profit growth rate of 496%, operating income of 96.9 billion yuan. Linktron Electronics (002036)China News: Net profit of 0.3 billion yuan, net profit growth of 13%, operating revenue of 47.3 billion yuan.
Wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, etc. Wireless charging of mobile phones mostly uses the principle of electromagnetic induction. Electromagnetic induction wireless charging, when the current of the power supply through the coil (wireless charger's power supply coil) will generate a magnetic field, other unenergized coils (mobile phone side of the electric coil) close to the magnetic field will produceIt generates electricity to charge the phone.
The first is field-coupled charging. First, there are two sets of asymmetrical electric dipoles on the phone and charging device. When they are close together, they produce a coupling phenomenon and achieve the transmission of current. The transfer efficiency is good, but there are distance restrictions, and large capacity charging stations are required. The second type is magnetic resonance charging, which is different from the above electric field. This method generates electrical energy through the resonance of the same frequency magnetic field generated by the resonators at both ends.
The wireless charger is connected to the power supply, and the phone can be charged by gently putting it on. Adopt Qi wireless charging standard, support two charging modes 5 watts and 10 respectivelyWatt, 5 watt output power for Mi mix3 fast charge.
1, the more common SoC are IDT, TI, COPO, purple light, etc. Most of the internal mobile phones are currently using IDT receiving schemes. Texas Instruments TI receiver chips used more in the first two years, and now they have downplayed the field of wireless charging. The integration of this chip is high and the efficiency is high, but the cost of a single chip is high and some additional work cannot be addedI can.
2, the most used is Ti's chip, about 12 pieces. There are many options for launch, and we're one of them.
3, the chip itself measures 7x4x0.5 mm, making it a fraction of the size of a coin. The chip doesn't work alone, but according to Energous, depending on the power level of the device it's using, the chip can be coupled to a matching circuit of two standard discrete components and a small antenna, which would become a complete wireless charging receiver.