1, the working principle of QC protocol: the device outputs voltage signals to the charger through USB data communication port D and D-, and the built-in USB decoding chip of the charger determines the voltage that the charger needs to output.
2, fast Charge protocol is a mechanism to improve charging efficiency by intelligent regulation of voltage and current, such as USB PD (USB Power Delivery) and QC (Quick Charge). The USB PD protocol is formulated by USB-IF, supports high-power output, and is suitable for manyKind of device and allow fine power negotiation. The QC protocol, especially Qualcomm's version, is widely used in Android devices with its fast charging capabilities.
3, about 5mA. After the wireless charge is connected to the QC power supply, the 9V gear of the QC0 protocol is shaken, and the standby current is about 5mA. Wireless charger is the use of electromagnetic induction principle of charging equipment, its principle and transformer similar, through the sending and receiving end of each arranged a coil, the sending end of the coil under the action of power to the outside electromagnetic signal, the receiving end of the coil received electromagnetic signal and electromagnetic signal into the current, so as to reachTo the purpose of wireless charging.
4, wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, 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 coil (mobile phone side of the electric coil) close to the magnetic field will generate current, charging the mobile phone.
5, the BC standard ensures compatibility and security. In summary, public protocols such as USB PD and QC dominate with their broad compatibilityMarket, but relatively inefficient; Proprietary protocols such as SCP offer speed advantages, but may be limited in device compatibility. In the future, with the continuous progress of technology, we look forward to more efficient and secure fast charging protocols, and wireless fast charging will also bring new challenges and opportunities.
6, the fast charge protocol is the most common charging protocol, and many charging banks support this protocol. It allows the charging bank to provide a large amount of power to the device in a short period of time, greatly improving the charging efficiency. For example, some fast charge banks support QC0 or QC4 protocols, which are capable of providing charging power up to 18W or higherThe charging speed is very fast. The wireless charging protocol allows the power bank to charge the device wirelessly.
Fixed wireless charger. The owner needs to buy a suitable wireless charger equipment, and then fix the wireless charger on the vehicle, and the fixed position should be convenient for the owner to take. Connect the cigarette lighter. One end of the USB data cable of the wireless charging device is connected to the wireless charger, and the other end is connected to the car cigarette lighter interface. Put it in your phone. Put your phone in a wireless charger and it will start charging.
First, find the appropriate location of the cab and install the car wireless charger; Next, connect one end of the USB data cable of the wireless charger to the cigarette port of the car, and the other end is connected to the charger; Make sure the charger is securely installed and will not slide while driving, and then place the phone on the charger to start wireless charging. Wireless charging technology comes from the principle of radio energy transmission, which is mainly divided into two modes of low power and high power.
First of all, fix the car wireless charger to the appropriate position in the cab, connect the data cable connector of the wireless charger to the cigarette lighter interface of the car, and anotherThe head is connected to the wireless charger, and after fixing the wireless charger, ensure that the wireless charger will not slip off, and the wireless charger can be used normally.
Buy a wireless charger that matches your phone: After making sure your new device is compatible with your phone model, choose a location that is easy to reach during driving and fix it. Connect the power: Connect the wireless charger to the car cigarette lighter interface with the USB data cable to ensure that the charger is stable for stable power supply.
Steps to use wireless car charging: First, prepare the wireless car charging device and fix it in the appropriate position in the cab.Next, connect one end of the USB data line of the wireless car charger to the cigarette opening position of the vehicle, and connect the other end to the wireless car charger. Ensure that the position of the wireless car charger is stable and will not slip off during driving, and then put the phone on the car charger to charge.
The use of wireless car charger is as follows: First, the wireless charger needs to be fixed in the proper position in the cab. This can be done by using a mounting bracket or other fixture provided by the phone's wireless charger. The fixed bracket can help the mobile phone wireless charger to remain stable and avoid shaking during driving. Next, needMade this?
1. If your Huawei mobile phone supports the wireless charging function Wireless Charging How to communicate , after the wireless charger is powered, directly place the mobile phone screen facing up in the center of the charger or the position suggested by the manufacturer to charge.
2, electromagnetic induction. This is the more common way of working wireless charger Wireless charge how to communicate , it uses the principle of electromagnetic induction Wireless charge how to communicate , through the electromagnetic between the primary and secondary coilsInduction to generate current wireless charge how to communicate , so as to achieve the transmission of energy in the space; The implementation of this wireless charger has been promoted by the Wireless Charging Alliance.
3, the basic principle of wireless charging is to convert the current into a magnetic field, and the magnetic field is transmitted through the air and then converted into a current to be transmitted to the intelligent terminal. When the system works, the input end converts the AC mains into direct current through the full bridge rectifier circuit, or uses the 24V direct current end to supply power to the system directly. After power management modeThe DC output after the block is converted into high-frequency alternating current by 2M active crystal oscillator inverter to supply the primary winding.
4. Through near-field induction, the wireless charging device conducts energy to the charging terminal device, and the terminal device converts the received energy into electrical energy and stores it in the battery of the device. The principle of energy conduction is inductive coupling, which can ensure that there is no exposed conductive interface, which can not only save the messy transmission line between the equipment, but also be safer for electronic devices such as electric toothbrushes that are often in contact with conductive media such as liquids.
5, wireless charging system mainly uses the principle of electromagnetic induction,Energy transfer is realized by energy coupling through the coil. When the system works, the input end converts the AC mains into direct current through the full bridge rectifier circuit, or uses the 24V direct current end to supply power to the system directly. Wireless charging technology is a special way of power supply, it does not need the power line, rely on electromagnetic wave propagation, and then the electromagnetic wave energy into electricity, and finally achieve wireless charging.