Electrical Characteristics and Key Parameters of Lithium Batteries

• 1. Lithium Battery Charge-Discharge Curve

The charge-discharge curve of a lithium battery refers to the relationship curve between the battery's capacity and open-circuit voltage. Based on the battery's discharge curve, the remaining charge can be roughly estimated, as shown in the figure below.

The charge-discharge curve of lithium batteries is not only related to the magnitude of the charging and discharging currents but also to temperature. As shown in the figure below.

• 2. Key Parameters of Lithium Batteries

Due to their inherent characteristics, lithium batteries must not be overcharged, over-discharged, subjected to excessive current, or exposed to excessive temperatures. Therefore, to ensure safety and battery longevity, appropriate protective measures must be implemented. Several commonly encountered parameters are listed below.