Can lithium batteries be compatible with all kinds of fast charging?

A wide range of charging tips 1. The output voltage/current on the charging head is only the maximum allowable value, not the actual output value. The actual output value depends on the specific needs of the mobile phone/mobile device. 2. Charging first passes through the constant current stage. At this time, the battery voltage is lower than the charging voltage (mostly 4.3v), and the battery voltage increases during the constant current charging process, when it reaches about 4.3v (the battery capacity is about 85%) , Enter the constant voltage method, the charging current is gradually reduced, and the charging is about to be completed, and then enter the trickle charging method to charge with pulse current to extend the battery life. 3. The larger the battery capacity, the larger the acceptable charging current, which is what we often call charging 0.5c, 1c. For example, a 3000mAh0.5c (rechargeable) battery can accept a charging current of 1500ma, which means it can accept a current of 1.5a. With the improvement of skills, the current acceptable charging current value of lithium batteries is increasing, which greatly shortens the charging time in the constant current stage. 4. The voltage output by the charging head will not be directly applied to the two stages of the battery, and there will be a secondary voltage drop electrode inside the phone. Therefore, the high-voltage 9v and 12v of fast charging are only to increase the charging power, reduce the heat loss during the transmission process and prevent reaching the upper limit of the current of the microUSB port. It is not that 9v and 12v are loaded directly at the north and south poles of the battery. Experiment 1: Different charging heads charge iPhone6s at a speed. Many people may remember that when their iPhone uses some third-party charging heads or data cables for charging, the timing of the hand prompts that the cable or accessory is not certified, and the charging current Will also be restrained, greatly increasing the time required for charging. But up to now, even if we use the right or wrong original charging head, it seems that we rarely see the prompt that this cable or accessory has not been certified. So the question is, even if there is no relevant prompt at present, will the charging speed be affected by using the non-original charging head and the original charging head to charge the iPhone? Let's go through experiments to verify. Inspection link: inspect mobile phone: iPhone6s (Hong Kong version, iOS9.3.1), charging head: original iPhone, plug-in board with USB port, third-party charging head. Inspection method: Use a USB voltage/current tester to perform real-time monitoring of charging, and separately monitor the voltage/current values u200bu200bat 10%, 50%, and 95% in 6s (the specific power is slightly deviated). (When the same mobile phone has the same remaining power, the input voltage/current requirements are inevitable, so only need to ensure that the voltage/current values u200bu200bread at the three times are similar (the power base is the same), and the total charging time can be the same .) The results of the verification of the verification data show that the output power of the third-party charger is the same as that of the original iPhone charger during the two periods of the verification (fast charging phase/trickle charging phase). At this time, the charging speed is appropriate and the USB output is available. At this time, the output voltage of the plug-in board is relatively large, and the output power is also ahead of the other two. Therefore, the charging speed ranking (estimated) is: socket with USB 'iPhone original charger u003d third-party charger (from fast to slow). Of course, different third-party chargers/sockets with USB have different output effects. The author used 5 original chargers of different brands + 2 plug-in boards with USB output for inspection (50% power of the mobile phone), and found that the output voltage is slightly greater than 5v (some of the higher line compensation can go to 5.3v, And there is no line compensation below 5v), and the current is also about 1a. So using some non-original charging heads to charge the iPhone is actually faster than the original charging heads. Of course, counterfeit/low-quality chargers are a different story. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: Why is the ternary cathode material power lithium battery pack becoming more and more powerful?