Lithium battery charging method and method analysis

Lithium battery power must be charged with a matching charger. In the industrial supporting market, since each product is packaged separately and is not compatible with each other, the corresponding charger should be selected according to the lithium battery pack used and charged in strict accordance with the requirements. Regardless of the industrial or civilian market, since the basic principles of lithium battery charging are the same, the steps and standards for charging lithium batteries can be regulated. Under normal circumstances, the nominal voltage of lithium batteries is 3.7V, and the full voltage It is 4.2V. Lithium battery charging is divided into two stages: 1. Constant current charging, that is, the current is constant, and the voltage of the lithium battery gradually increases with the charging process. According to the above specifications, it is generally charged with a current of 0.2C (C is the nominal capacity and current of the battery). A way of comparison, 0.2C is 200mA), when the battery voltage is close to the full voltage of 4.2V, change the constant current charging to constant voltage charging. This process takes about five hours. 2. Constant voltage charging, that is, the voltage is constant, and the current gradually decreases as the saturation of the cell deepens. According to the specification, when the current decreases to 0.01C or 10mA, the charging is considered to be terminated. After this process and the constant current charging time are added together, the total charging time should not exceed eight hours. Therefore, there are two criteria for judging whether the lithium battery has reached saturation: one is that the current is 0.01C, and the other is that the total time does not exceed eight hours. In other words, if the lithium battery charging process still cannot reach 0.01C after eight hours, It is regarded as a non-conforming product. The correct way to charge the lithium battery: 1. Charge according to the standard time and procedure, even the first three times; 2. When the machine battery is too low, you should try to start charging as soon as possible; 3. The activation of the lithium battery Don't take special measures, the lithium battery will be naturally activated during normal use of the machine. If you insist on using the circulated first three 12-hour long charge activation methods, it will actually not be effective. 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: What is a lithium battery?