Today to share the knowledge of wireless charging program development, which will also explain the wireless charging technology route, if you happen to solve the problem you are now facing, don't forget to pay attention to the site, now start!
< ul>1, the most used is Ti's chip, about 12. There are many options for launch, and we're one of them.
2, wireless charging PCB, different functions, the required components are different. The required components are: resistor, capacitor, resonant capacitor, resonant coil, MOS tube, control chip, protocol chip.
3, the realization of wireless charging function requires a wireless transmitter module and receiving module, and now the new mobile phones launched by the major mobile phone brands on the market have built-in wireless charging receiving module, some mobile phones without built-in receiving module need an external receiving chip, the use of the receiving chip is also very simple (plug into the mobile phone charging port); The wireless charger needs to be connected to the power supply, but the phone can be placed on the wireless charger for wireless charging of the phone.
4, iPhone11 as Apple's flagship iPhone11 also supports wireless charging, but relative to domestic handsFor the machine, the charging rate may be slower, but other aspects are still very strong, such as the iPhone11 has a variety of different colors to choose from, and also the new addition of green and purple, very small and fresh.
5, iPhone EXR can be charged wirelessly. However, it should be noted that the official standard is a USB power adapter, and there is no wireless charger. So if you want to experience the wireless charging function of the iPhone EXs, you need to buy your own wireless charger. IPhone EXR is a smart phone device owned by Apple (Apple Inc.)Achieve power transmission between the power supply and the device without physical connection. Its basic principle can be summed up in two ways: electromagnetic induction and magnetic resonance. In the electromagnetic induction mode, the transmitting end and the receiving end of the wireless charging device have a coil. When the coil at the transmitting end is energized, a magnetic field is generated.
2, electromagnetic induction: simple and efficient close contact electromagnetic induction, like a pair of tacit understanding of the dancer, the sending end and the receiving end through the induction of magnetic flux transfer power. It is known for its simple structure, high efficiency and low cost, and is especially suitable for close-range device charging. However, it also has limitations, limited transmission distanceIn addition, the charging position must be accurately aligned, as shown in Figure 4-1.
3, the principle of wireless charging The principle of wireless charging is to transfer energy to the device that needs to be charged through electromagnetic induction or electromagnetic radiation. Specifically, wireless charging is divided into two ways: electromagnetic induction and electromagnetic radiation. Electromagnetic induction: Through the principle of electromagnetic induction, the current at the transmitting end is converted into a magnetic field, and then the energy is transferred to the receiving end through the magnetic field, and then the energy is converted into current, so as to achieve wireless charging.
4, the core of wireless charging technology is the electromagnetic induction principle. DangichiWhen an alternating current is applied to a coil, it generates an alternating magnetic field. If another coil is placed in this magnetic field, it will also induce an electric current. This is the basic principle of energy transmission through magnetic field coupling. Wireless charging devices are divided into two types: receiver and transmitter. The receiving end is responsible for converting the received electromagnetic wave into electrical energy to charge the device.
1, wireless charging engineer job responsibilities 1 Qualifications: more than three years of wireless charger product development experience; Familiar with analog circuits, numberWord circuit and power line design; Proficient in using pads20xx and other circuit and PCB drawing software; Understand the product development process; Work carefully, good communication skills; College degree or above, major in electronics.
2, in the upcoming release of the new version of the McGeek energy disk test, our engineers on the charging process of temperature control, power, continuity, etc. have carried out the maximum debugging, and strive to make the wireless charging experience to be the best.
3, electromagnetic induction. This is the more common way wireless chargers work, which uses the principle of electromagnetic induction through primary andElectromagnetic induction between secondary coils to generate current, so as to achieve energy transfer in the space; The implementation of this wireless charger has been promoted by the Wireless Charging Alliance.
4. Wireless charging technology was invented by Nikola Tesla. In 1890, the physicist and electrical engineer NikolaTesla had already done experiments with wireless power transmission. The International System of Units for magnetic induction is also named after him.
5, if you use vivo mobile phone, wireless charging is also known as inductive charging or non-contact inductive charging, based on electromagneticInductive principle, the device that needs to be charged can be charged by contacting the wireless charger after being energized.
1, ZTE wireless charging project is actually in the stage of innovation and development, the basic task is still to "improve the five maturity", should not be rushed to commercial, forced to the industrial operation stage. Instead, it should be: real breakthrough and real innovation in core technology. Charging power, charging efficiency and charging distance are wirelessCharging three core technologies.
2, in the process of product development, Liu Aiming even used the toilet on the plane as an example to motivate the team. The bathroom space on the plane is small, but it does not neglect any performance, "the function may be stronger than your home 10 square meters." Saying this, Liu Aiming's gestures and expressions could not help but enrich. The toilet of this latest room type is only 6 square meters, but it is divided into three functional areas for washing, shower and toilet, although the sparrow is small, it is complete.
3, market application development bottleneck core wireless charging technology is not perfect; Radiating regions are difficult to achieve at great distancesOff-transmission; Long distance positioning requires too much hardware. Magnetic resonance height matching can be controlled small; The application scope is limited and has not been extended; Market factors and consumer psychology make developers reluctant to vigorously develop technology.
4, Wan 'an Technology (002590) said on the interactive platform that the company's new energy vehicle wireless charging technology is basically mature, and it is expected to enter the small-batch mass production stage in the second half of 2021. The company's holding subsidiary Shanghai Wanji Electronics is a supporting supplier of BAIC New Energy and FAW Red Flag wireless charging products. Jing Quanhua (002885) has cooperated with customers to do automotive wirelessProduct development of charging technology.
Wired electrostatic ring. Free from static interference, used to release the static electricity of the human body. Oil-based pen. Oil-based pens are relative to water-based pens and alcohol pens, and oil-based pens are usually used to quickly express design ideas and design renderings. The computer. The computer, commonly known as the computer, is a modern electronic computing machine used for high-speed calculation, which can perform numerical calculation, and can perform logical calculation, and also has storage memory function.
inWire burning 24C32 refers to the process of writing data to the 24C32 EEPROM chip over a network connection. 24C32 is a common serial electronic erasable programmable read-only memory chip, which has the characteristics of small size and high reliability. The steps of online burning 24C32 include connecting electrical lines, configuring burning tools and software, and selecting the correct address and data to write to the chip.
Charger (charger) according to the design circuit operating frequency to divide, can be divided into power frequency machine and high frequency machine. The power frequency machine is designed based on the traditional analog circuit principle, and the internal power devices (such as transformers and inductors) of the machineGenerally, there is less noise when running with a large load, but the model has strong resistance performance in harsh power grid environmental conditions, and the reliability and stability are stronger than that of high-frequency machines.
1, Qi certification test process includes a number of specific standards and stringent requirements, covering safety, interoperability and energy efficiency testing, to ensure that each device and charger work together, compatible with multiple devices. This process also includes member registration and Logo license agreement signingMultiple steps, such as product registration, data filling, Logo authorization review, test implementation, interoperability verification, product information revision and final audit, are finally included in WPC's product database.
2, apply for Qi certification to provide 5 samples, at least 3 sets of test AIDS, product instructions and operating instructions, self-declaration form. The certification process is carried out by a professional QI certification agency, such as Beijian New Energy, which has CNAS/CMA qualification and provides a full range of one-stop services from certification application to product registration to help customers easily obtain a pass to enter the multinational market.Cost-effective, faster cycle.
3. Compliance test. At least 5 samples are required to be sent to test, one of which will be scheduled for compliance testing first, and the compliance test sample will be retained in ATL after passing the test. The main test contents include: 1) timing of communication protocol between transmitter and receiver; 2) Test the power output capability through the translation of the XYZ axis; 3) The maximum supply capacity of energy transmission; 4) Foreign Object Detection (FOD).
4, wireless charging Qi certification test content includes symbolsCompliance test and Interoperability Test. The compliance Test was conducted by the Authorized Test Lab (ATL) with 5 samples.
5, wireless charging Qi certification mode is divided into: 1) Qi-BPP certification: The product supports 5W power below, the use of Qi protocol, must be BPP certification. 2) QI-EPP certification: The product supports more than 5W power, the use of Qi protocol, must be EPP certification. 3) Qi-PPDE certification: Products support more than 5W power, using Samsung private protocol PPDE, must pass the BPP certification PPDE test (starting from July 1, 2019).
6, WPC has an absolute advantage in the field of wireless charging standards. The Qi wireless charging standard effectively ensures that we will never encounter these problems. After the phone or charger passes the Qi certification, it is tested for safety, effectiveness and compatibility by the Wireless Charging Alliance. The operating power of Qi certified equipment must be 0-30 watts (Qi standard can reach 1 kilowatt, but is not applicableMobile phones), pass temperature tests and comply with Qi FOD standards.
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