The wireless charging technology is derived from the wireless energy transmission technology and can be divided into two modes: low power wireless charging and high power wireless charging.
Low-power wireless charging often uses electromagnetic induction, such as the Qi method of charging the mobile phone, but the inductive type of the wireless charging method of the electric vehicle of ZTE. High-power wireless charging often uses resonant (most electric vehicle charging uses this method). The power supply device (charger) transfers energy to the powered device, which uses the received energy to charge the battery and simultaneously supply itself. For operational purposes.
Since the magnetic energy is transmitted between the charger and the electric device, the wires are not connected between the two, so that the charger and the electric device can be exposed without conductive contacts.
Basic principles of wireless charging technologyElectromagnetic induction
The primary coil has a certain frequency of alternating current, and a certain current is generated in the secondary coil by electromagnetic induction, thereby transferring energy from the transmitting end to the receiving end. At present, the most common charging solution uses electromagnetic induction. In fact, the electromagnetic induction solution does not have much mystery in technology implementation. The local Chinese BYD company applied for non-contact inductive charging as early as December 2005. The patent is patented and uses electromagnetic induction technology.
Magnetic field resonance
It consists of an energy transmitting device and an energy receiving device. When the two devices are adjusted to the same frequency or resonate at a specific frequency, they can exchange energy with each other. This is a technology currently under study by Massachusetts. The research team led by Marin Soljacic, a professor of physics at the Institute of Technology (MIT), used the technology to light a 60-watt bulb two meters away and named it WiTricity. The coil used in this experiment has a diameter of 50 cm and cannot be commercialized. If the coil size is to be reduced, the receiving power naturally decreases.
Radio wave
The latest wireless charging concept stocks at a glance1. Shuo Baide : A-share first enters the wireless charging communication antenna faucet
The company is a leading enterprise in domestic communication terminal antennas. Shuo Baide (300322) is a manufacturer specializing in wireless communication terminal antennas. Its main business is the development, production and sales of wireless communication terminal antennas. The company is committed to providing a package of antenna solutions for a variety of wireless communication terminal manufacturers such as mobile phones, notebook computers, APs, mobile TV terminals, and satellite positioning terminals.
Wireless charging has already been laid out, and once it rises, the company will benefit first. The company entered the wireless charging industry in 2008 and established the Wireless Charging Products Business Division, which was one of the first members to join the Wireless Charging Alliance (WPC). The company has advantages in antenna design, low-cost manufacturing, and terminal manufacturer certification that are difficult for other manufacturers in the industry chain. At present, it has mastered two-color injection molding, LDS antenna, NFC antenna, 3D packaging, camera module and wireless charging technology. Once domestic manufacturers start pushing wireless charging, the company may be the first to benefit.
2, Sunlord Electronics : Inductor faucet, has mass production wireless charging coil
The company is the domestic inductor leader. The company is mainly engaged in the research and development, production and sales of chip inductors, chip beads, chip varistors, NTC thermistors and common mode yoke coils. In the traditional field of inductors, the company's competitive advantage (Aiji, net worth, information) has become more and more obvious, and its comprehensive strength has been among the highest in the world.
The company has been able to mass produce wireless charging coils. Sunlord Electronics (002138) said that the company's wireless charging coils have been mass-produced and are being marketed. If the wireless charging market is gradually opened, the company may be the first to benefit.
3, Lixun Precision : the absolute leader in the connector industry, iwatch wireless charging supplier
With connectors as the core, we will continue to expand new application areas and develop into platform companies: the company's main connector development, production and sales, products are mainly used in 3C (computer, communication, consumer electronics), automotive and communications equipment, etc. field. At present, the field of communication and high-end consumer electronic connectors has gradually increased in volume and is actively expanding in the automotive field, which is expected to become one of the important growth points of the company in the future.
Iwatch wireless charging business will be the company's next growth engine (Aiji, net worth, information): Apple will postpone the 2015 Iwatch will be wireless charging function, the company's wireless charging coil has passed Apple certification, and will also supply The wireless charging module is expected to achieve a 70%-80% share. From a market perspective, wireless charging, whether coils or modules, is incremental for the company, and the lighting cable that matches the iwatch is another increment. In addition, with the popularization of wireless technology, other brands such as Samsung will adopt wireless charging technology in the future. As a technology leader, the company will benefit the overall development of the industry.
4, Jinsheng Precision : a precision component manufacturer that successfully transformed metal casings
Domestic consumer electronics precision structural components integration solution experts: The company focuses on the development and production of precision molds and precision structures in the consumer electronics field. Through continuous product line extension, the company has initially formed a prototype of the industry chain integrator and successfully transformed itself into a metal shell manufacturer. At present, the metal casing has been fully launched and is an important supplier of Samsung, Xiaomi and Amazon.
Antenna design and manufacturing technology is expected to expand into wireless charging, NFC and other fields: Although the company has not yet introduced wireless charging coils, due to the company's experience in metal precision structure, the company's management has proposed the company's antenna design. Manufacturing technology has expanded to include in wireless charging, NFC, smart home and other product areas.
5, An Jie Technology : benefiting from the intensive release of new Apple products, the acquisition opens up new space
The company and Apple are very relevant and will benefit from the intensive release of Apple's new products this year. The company's Apple revenue accounts for about 50%. Traditionally, the company is an ipad concept stock. In addition, the company acquired supernoVa, its main business is automotive electronics, hard disk, home appliance industry chain, the company will cut into the automotive electronics, hard drive industry chain after the acquisition.
The new material magnetic guide will be used for wireless charging. Recently, the company is actively developing new material magnetic conductive sheets. The company intends to combine magnetic conductive sheets with antennas to produce wireless charging or wireless payment functions. At present, the company has prepared samples and is actively promoting it to customers.
6, deep Sang A:
Sangfei Consumer Communications Co., Ltd., a controlling shareholder, is involved in wireless charging technology, and is a related company relationship with Shensangda, which is controlled by the controlling shareholder.
7. Qingdao Haier:
Haier's "Tailless TV" uses wireless power transmission technology in cooperation with the Massachusetts Institute of Technology to deliver power to the TV without the use of wires. This is the first time that wireless power transmission technology has been successfully applied to TV receiving terminals.
8, Leibai Technology:
Recently released a number of 5G wireless products. This is the first time since the launch of 5.8GHz wireless technology, the 5G wireless products are released.
This is a relatively mature technology, similar to the early use of ore radios, mainly composed of microwave transmitting devices and microwave receiving devices, which can capture the radio wave energy rebounded from the wall and maintain stable DC while adjusting with the load. Voltage. This way you only need a transmitter that is mounted on the wall plug and a “mosquito†receiver that can be installed in any low voltage product.
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