1, the wireless charging coil test is good or bad as follows: test the coil electricityResistance value, resistance value within a certain range is a good product. Test the Q value of the coil, the higher the Q value, the better the performance. Test the coil temperature rise, the lower the temperature rise, the better the performance. Test the efficiency of the coil, the higher the efficiency, the better the performance.
2, wide impedance range, to meet a variety of needs of the inductance of the wireless charging coil is usually at the micro hen level, the test frequency is in the kHz range, which requires a wide and accurate measurement range. The E4980A/AL has a wide impedance range from 4 milliohm to 100 milliohm, and can cover this band with 10% accuracy, making it particularly suitable for the precise evaluation of wireless charging coils.
Therefore, in the test must consider the charger, interface line and battery three aspects of the match, in order to ensure the accuracy of the charging efficiency. Next, the fast charging efficiency of different mobile phones is evaluated through a test device with a charge control chip. The test device records the battery voltage, current, and charging time of each phoneKey data, such as charging speed, and then comprehensively calculate the charging efficiency of each mobile phone.
First of all, the battery loss test of the mobile phone is completed by simulating the user's use scenario. Testers will use the phone for a certain period of time for different operations, including music, video, games, etc., to test the wear and tear of the phone in different scenarios. At the same time, it is also necessary to consider various network environments, such as 4G, 5G, WIFI, etc., in order to test the battery consumption under different networks.
minutes reaches or exceeds 10%, and the charging efficiency is even higher than the direct use of wireless chargers. In contrast, the Deep Blue SL0 Long comfortable Da and Wei brand Blue Mountain DHT-PHEV are obviously not too friendly for Apple iPhone 13 Pro, with a 15-minute charge of 3%, which is a large gap compared with other test models.
"Wireless charging Systems for electric vehicles - Part 2: Communication protocols between onboard chargers and charging devices" (GB/T 38772)), "Electric vehicle wireless charging system Part 3: Special requirements" (GB/T 38773), "Electric vehicle wireless charging system Part 4: electromagnetic environmental limits and test methods" (GB/T 38774) a total of 4 national standards.The maximum charging efficiency of Xiaomi and Huawei requires the mobile phone to support its own protocol, so we separately tested the situation of Huawei Mate 30 with Huawei wireless charging mobile phone bracket and Xiaomi 10 with Xiaomi wireless charging mobile phone bracket. Standard tests use the iPhone 11 pro with all wirelessCharging mobile phone stand, the rule is that the phone keeps the screen lit, and the time required to charge 10% (the phone battery is charged from 40% to 50%) is tested on all products under test.
1, final product confirmation; 7) Review and issue certificates. Qi certification process Wireless charging Qi certification test includes: Compliance test and Interoperability Test. 1 Compliance test by complianceTest experiment ATL (Authorized Test Lab) was conducted, and 5 samples were sent for test.
2, Qi certification testing content detailed Qi certification testing content is rigorous and comprehensive, mainly including: transmitter and receiver communication protocol: to ensure that both sides can quickly and accurately exchange data. Power output and stability: In the XYZ axis translation test, verify the wireless charging capability of the device at different angles. Energy transmission limit: Test the maximum power supply capacity of the equipment to ensure safety performance.
3, the cost of Qi certification includes two parts: test fee and registration feeThe test costs mainly include ATL test fees and interoperability test fees, which are determined by the authorized test laboratory. Registration fees vary according to membership category, associate members cannot register products, and other WPC members do not have to pay additional registration fees. The certification cycle is generally about 5 to 2 months, depending on whether the product has passed all the testing items.