Impedance

Impedance refers to the total resistance encountered by alternating current as it passes through a circuit or device, including the effects of resistance, inductance, and capacitance. Its unit is ohm (Ω), and it is usually used in the field of batteries to describe the internal response ability of batteries to alternating current.
Factors affecting impedance: temperature change (impedance increases when the temperature is low), state of charge (SOC), cyclic aging (SEI film thickening, electrode powdering), structural damage (e.g., collector fluid fracture).

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