The relevant standards for wireless charging have not yet been introduced, and according to the specification documents of the wireless charging Alliance, the working frequency of wireless charging products is set in the range of 50HZ 60HZ, theoretically its electromagnetic radiation level is equivalent to that of ordinary small household appliances. This standard is lower than the electromagnetic field exposure limits for products exposed to the public issued by the International Commission on Non-Ionizing Radiation Protection (ICNIRP), which are currently approved by expert committees in more than 35 countriesApproved by the committee.
w. At present, domestic mobile phones have supported 50W wireless charging, 50W is also the upper limit of the provisional wireless charging standard, but even so the frequency of wireless charger is still not as good as the traditional charger, Samsung launched 15W wireless charger at this time, it is confusing.
The current wireless charging Alliance (WPC) formulated the Qi standard of the charging frequency is generally about 100kHz, it is recommended to look at this standard, it is the current more mainstream standard in wireless charging.
Disadvantages of wireless charging slightly lower efficiency: general chargerAt about 1800 yuan, the specific cost may vary by region, it is recommended that owners directly consult local dealers to obtain accurate information.
From the comparison of internal configurations, it can be seen that the Mercedes-Benz EQC 400 4MATIC has higher comfort and luxury, with steering wheel electric adjustment, steering wheel shift, steering wheel memory, wireless charging of the front phone and other functions, and has the exclusive configuration of the car air purifier. The iX3 Innovation Model and the Audi e-tron 55 quattro Technology have more rear seats than the Mercedes-Benz EQC 400 4MATICIndividual air conditioning, sports style seats. In terms of power, Mercedes-Benz EQC is equipped with a total of two induction induction motors before and after, respectively, providing the maximum output power of 286 HP and 408 HP for the vehicle, and its 0-100km/h acceleration time is 9 seconds and 1 second respectively. Mercedes-benz EQC is equipped with a ternary lithium battery pack with a battery pack capacity of 72 KWH, and its NEDC comprehensive range is 408 km and 415 km according to the different models.
1, but the advantages of wireless charging are also very obvious. Since there is no need to plug and unplug the charging gun, the convenience of charging is significantly improved, and the risk of electric shock is reduced. More importantly, if dynamic wireless charging mode is deployed, it can greatly reduce the amount of battery power carried by electric vehicles, reduce the cost of the vehicle, and completely solve the user's driving range anxiety.
2, low-power wireless charging often uses electromagnetic induction, such as the Qi method of charging mobile phones, but ZTE's electric vehicle wireless charging method uses induction. High power wireless chargingHigh-power wireless charging usually adopts a resonant mode (most electric vehicle charging uses this mode) by the power supply device (charger) to transmit energy to the electric device, which uses the received energy to charge the battery, and at the same time for its own operation.
3, secondly, wireless charging technology wants to be truly popular, and it also has high requirements for the precise positioning and intelligence of vehicles. Only when the vehicle is precisely parked in the charging space can the ground system establish a channel with the vehicle's on-board system and achieve charging. In the case of precise positioning, the same footprint, the number of electric vehicles using wireless charging andCompared with the traditional charging pile charging, it will be greatly improved, greatly improving the space utilization rate and charging efficiency. 4, in general, wireless charging technology is showing broad prospects for development, is expected to become the mainstream of electric vehicle charging. However, technical difficulties and cost issues are still the key issues that need to be solved, which requires continuous innovation and improvement by researchers.
1, QI is not required, CE is a mandatory requirement. butExports to Europe are generally relatively high-end, can do a QI recognition will be higher.
2. Yes. Qi certification is optional. However, if it is exported to the EU, whether it is Tx or Rx, it is recommended to do CE Qi.
3, wireless charger is required to apply for Qi certification. The application process is as follows: 1) Membership application; 2) Product registration; 3) Product provision; 4) Product compliance testing; 5) Product compatibility test; 6) Final product confirmation; 7) Review and issue certificates.
4, wireless charger export to the EU, in addition to qi also need to do CE certification.The "CE" mark is a safety certification mark that is regarded as a passport for manufacturers to open and enter the European market. CE stands for European unity. All products with the "CE" mark can be sold in the EU member states, without meeting the requirements of each member state, so as to achieve the free circulation of goods within the EU member States.
The German WIFERION, which Tesla bought, is changingThe logic behind the wireless charging technology applied on the installed Model 3 is electromagnetic induction wireless charging. At present, the modified Tesla Model 3 can achieve a maximum of 12KW wireless charging power, the fastest one hour to make up 80 kilometers, full may take about 6 hours.
First of all, Tesla's wireless charging technology uses the principle of electromagnetic induction. The technology transmits energy through special electromagnetic fields, allowing Tesla cars to charge themselves when parked. This technology is not only efficient, but can also greatly reduce charging time. Second, Tesla's wireless charging technologyThe technique also has the characteristics of intelligence. According to WiTricity's website, the company's wireless charging technology can achieve a charging efficiency and speed close to that of conventional home charging piles, and it will charge 90% to 93% from the grid to the battery. Charging power will be able to reach 6-11kW, or even higher; The working distance between the ground transmitter and the receiving end of the vehicle can reach 10-25 cm, and most of the pure electric sports cars, cars and urban SUVs can be normally adapted.
The Tesla's charging process takes about 12 hours or so, but uses homeWhen the charger is used, the voltage may drop due to the peak of the transformer load, which affects the charging speed. To increase efficiency, it is recommended to install a special wall-mounted charger, which will reduce the charging time to about 9 hours. The optional dual built-in charger can further shorten the charging cycle, and it only takes about 4 hours to full charge.
The advantages of wireless charging technology are convenience and versatility. The disadvantages are low efficiency and can only provide electrical energy. Apple's Dock connector not only provides power, but also syncs audio and video files to the device via USB. Wireless charging, thoughTechnology will bring improvements to WiFi and battery technology.
Power supply: wired hair straightener through the mains power supply, continuous work but safety risks and inconvenience to carry; Wireless rechargeable hair straighteners are safe and portable, but they work for a limited time after charging. Size division: divided into wide plate (90x42mm), middle plate (90x24mm), narrow plate (80-90x13-14mm) and mini (60x13-14mm).
Hair straighteners are divided from the structure, generally divided into V type and X type two, early more popular X type, but recently V type more popular. Because of VNot only can straighten the hair, the appearance of streamlined hair straightener, but also can be used for curling, more and more hairdressers use hair straighteners for curling.