How much current is suitable for charging lithium batteries?

The charging current of the lithium battery depends on the capacity. The greater the current, the less likely the battery will overflow. This is done to protect the lithium battery can be used normally, because overcharge and overdischarge will cause the lithium battery to leak or fail to function, or even explode. As far as the charging current of the fast charging stage of the lithium battery is concerned, as a dynamic process, the optimal charging current of the lithium battery is actually divided into three stages. 1. Optimal current during pre-charging: that is, when the initial/no-load voltage of the lithium battery is lower than the pre-charging threshold, it must first go through a pre-charging stage. For a single lithium battery, the threshold is generally 3.0V. At this stage, the pre-charging current is about 10% of the current in the constant current charging stage of the next stage. 2. The best current during constant current charging: The so-called constant current means that the current is constant and the voltage gradually rises, and then it enters the fast charging stage. Most of the constant current charging current is set to be between 0.4 and 0.6C, which can be understood as 0.5C, which means that it can overflow for about two hours without considering other factors. The reason why 0.5C is chosen is that this current is a good balance between charging time and charging safety. 3. Charging current during constant voltage charging: For a single-cell lithium battery, when the battery reaches a certain voltage value, it will enter constant voltage charging. This voltage value is generally 4.2V. At this stage, the voltage remains unchanged and the current decreases. Small; this kind of current reduction is a successively decreasing process, most lithium battery protection choose 0.01C as the termination current, which means that the charging process enters the end state. Once charging is over, the charging current drops to zero. The core of the best charging current of lithium batteries is the current design during constant current charging. It should be emphasized that most portable lithium batteries are better designed to be charged at 0.5C. For example, the conventional capacity of 18650 lithium batteries is 1800-2600mAh, which can be Choose 1A charging, and the rate type is 1200-1500mAh, and the charging current of 0.5C is 0.7A. The maximum charging current of lithium batteries is strictly determined by the battery structure. Therefore, various lithium battery manufacturers do not agree with this regulation, some are set at 0.6C, and the highest requirement for portable lithium batteries is 1C. Disclaimer: Some pictures and content of articles published on this site are from the Internet, if there is any infringement, please contact to delete.