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1. Physical characteristics
According to the actual evidence of lithium-ion batteries stored for a certain period of time, the physical characteristics (appearance, size, weight, etc.) of the battery will undergo certain changes, especially the appearance characteristics. In situations where the temperature and humidity of the storage environment are poor, this trend is more pronounced.
In cases of high humidity, the weight gain of lithium-ion batteries after long-term storage is significantly higher than that of batteries placed at low humidity. If the steel shell of the battery is prone to rust under high humidity, resulting in a slight increase in quality. Rust will not have an impact on the internal state of the battery, but it will directly affect the shipment of the product and may have a negative impact on its supporting electronic components.
2. Electrochemical characteristics
Long term storage of lithium-ion batteries may result in some side reactions, such as electrolyte decomposition, dissolution of active substances, and lithium deposition. After a long period of shelving, the equilibrium state inside the lithium-ion battery gradually changes. When it accumulates to a certain extent, the battery will undergo significant changes, which will be directly reflected in the electrochemical characteristics of the battery.
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