Lithium battery charging and discharging cycle

　　Charging and discharging cycle: The battery is called a charging and discharging cycle from the beginning of charging to discharging, and then to the beginning of the next charging.

　　Cycle Life: The number of charging and discharging cycles that a battery undergoes before its actual capacity decreases to a specified value. Usually used to define the service life of a battery. Generally speaking, the battery life varies with the depth of discharge.

　　Recovery effect: Under non continuous discharge conditions, after a period of discharge, the battery will open circuit without load or change from high current to low current discharge, and the internal charge of the battery will be redistributed to balance. At this time, the terminal voltage of the battery will rise, and a certain amount of electricity can still be released under low current discharge.

　　Self discharge: the battery capacity drops due to the internal electrochemical reaction when the battery is not working. It is usually related to time and ambient temperature. The higher the ambient temperature is, the more obvious the self discharge phenomenon will be. Therefore, the battery should be recharged regularly when it is not used for a period of time, and stored under appropriate temperature and humidity.

　　Historical archives: Key data of the battery since its production, such as its production date, nominal capacity, total ampere hours of use, and records of overcharging and discharging.

　　State Of Running (SOR): To evaluate the performance of a battery during charging and discharging, an evaluation value for the battery's operating performance is provided. SOR is divided into ten levels, ranging from 1 to 10. A SOR of 10 indicates good battery performance, while a SOR of 1 indicates very poor battery performance and urgently needs to be replaced.

　　Degree of Health (DOH): To evaluate the overall battery performance, a health level evaluation value is provided. DOH is divided into ten levels, ranging from 1 to 10. DOH values of (7-10) indicate normal battery performance, (4-6) indicate that the battery needs maintenance, and (1-3) indicate poor battery performance that should be replaced

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