Will it be useful to continue charging after the low-temperature lithium battery is fully charged?-南昌墙画手绘

The green light is just an instigation. Whether it is full or not depends on the control and judgment of the battery charging process of the seat charging. Take a 4.2V low-temperature lithium battery as an example to comment on this problem. First of all, control. The output of the battery is constant current first, then constant voltage (current gradually decreases, and then judgment. When the current is less than a certain current value, a green light appears, because the accuracy of analog-to-digital conversion and its own voltage accuracy are limited. The seat charging usually sets this current value to 50mA. The green light appears at this moment. Then the battery is indeed less than 10% away from its actual charging (according to my measurement, if the low-temperature lithium battery was turned off at 50mA, its capacity may now reach 95%. The charging burden can greatly improve. The original difficulty was what the seat charging was doing next: If the seat charging turned off the charging circuit and did not continuously charge the constant voltage, it would be useless to leave it on the seat charging for another 10 hours. Many seat charging plans are planned like this, such as Xin Energy's BQ2057 series charging chips. The seat charger continuously charges constant voltage and strictly controls the voltage not exceeding 4.2V. Undoubtedly, it may increase the capacity of the battery. The seat charger continuously charges, but its current control is very poor. If you are not alert, the battery will exceed 4.2V and run up continuously. Because the low-temperature lithium battery cannot receive overcharge. Continuously applying current to the battery will form this result, and overcharge will occur. This is of course a seat charger that is not planned. For example, the common ones can be charged with low-temperature lithium batteries and can be charged with nickel-hydrogen batteries for more than ten yuan; egg charging;. There is also a charging processing chip, such as the 1679 chip, which is the same as many mobile phone charging processing. It uses pulse method to charge. When it shows the green light, the low-temperature lithium battery is now full. Of course, it will not overcharge for another hour, and it is obviously doing useless work.