The cycle life of lithium battery refers to the number of charge and discharge cycles that the battery can withstand before the battery capacity decays to a specified value under a certain charge and discharge system. Refers to a charge and discharge cycle of a lithium battery, how many times after the battery capacity is reduced to 80% of the initial capacity (0.2C 80%DOD).
Lithium battery as a high energy density, try to avoid excessive discharge and overcharging during use, overcharging will lead to the imbalance of the chemical reaction inside the battery electrolyte, will lead to a sharp decline in battery capacity, shorten the battery life. Excessive discharge will cause the electrode material to form a chemical stable state under the normal potential of the battery, and the lithium ions that cannot be converted will diffuse on the surface of the flake graphite, forming a lithium gathering point, and accelerating the aging of the battery.