The battery self discharges when not in use

    Self discharge refers to the natural loss of capacitance of a battery when it is not in use. There are two types of capacity loss caused by self discharge of lithium-ion batteries: reversible capacity loss; The second is the irreversible loss of capacity.

    Reversible capacity loss refers to the ability of the lost capacity to be restored during charging, while irreversible capacity loss is the opposite. For example, lithium manganese oxide reacts with solvents to form a microbattery, resulting in self discharge and irreversible capacity loss. The self discharge level is affected by factors such as positive data, battery manufacturing process, electrolyte properties, temperature and time. If the self discharge rate is important due to the control of solvent oxidation rate, the firmness of the solvent affects the storage life of the battery. If negative is in a fully charged state and positive self discharge occurs, the capacity balance inside the battery will be disrupted, leading to permanent capacity loss.

    During prolonged or frequent self discharge, lithium may deposit on carbon, increasing the level of capacity imbalance between the two stages. Pistoia et al. believe that the oxidation products of self discharge block the micropores on the electrical data, making it difficult for lithium to be inserted and removed, and increasing the internal resistance and decreasing the discharge efficiency, resulting in irreversible capacity loss.

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