About the charging link of 18650 lithium ion battery

The three steps of 18650 lithium ion battery charging are divided into trickle, constant current power supply, and constant current source. If the battery power consumption is very low at the beginning of charging, then be sure to start charging with a small amount of current, that is, trickle charging. If the battery working voltage is not low at the beginning of charging (such as above 2.9V), there is no need to go through the trickle The whole process of current charging. Charging with low current is to better maintain the battery and prevent the impact of high current from damaging the internal structure of the battery (when the working voltage is very low, the battery will be damaged when it encounters a large current than when the working voltage is higher. Much higher). If the working voltage of the battery is not low, then it is possible to charge with a large current at the beginning, which is to choose the allowable larger current to charge. It is to better save the charging time, and the charging with a larger current is the most economical. It saves time and effort. Therefore, it is a blunt constant current power supply charging. As the charging progresses, the battery working voltage slowly rises. When the battery working voltage is at or close to the full working voltage (such as 4.2V), you must first switch to a constant current source for charging. Since the working voltage is filled, the working voltage can be maintained at this time and the base will not change. , Slowly reduce the amount of charging current. If you do not switch to a small amount of current for charging, it is likely to cause the operating voltage to be too high and experience the risk of charging. Overcharging is also harmful to the battery. Just like filling boiling water in a thermos bottle, you can pour it vigorously at the front, and reduce the running water when it is almost full, so that the water will not overflow easily when it is filled. In fact, the whole process of constant current source charging is not short. The power consumption charged in this time is about one-fifth of the total power consumption. Naturally completing the whole process of charging is also determined by the characteristics of lithium-ion batteries. For nickel-cadmium, nickel-manganese, or nickel-metal hydride batteries, the charging method is different. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: How to deal with the attenuated lithium-ion battery?