State of charge

Latest updated: Jan 23, 2024

State of charge (SOC) refers to the percentage of the actual capacity that can be released under manufacturer-specified discharge conditions in the current battery cell, module, battery pack, or system.

Its value ranges from 0 to 1, where SOC=0 indicates the battery is completely discharged, and SOC=1 indicates the battery is fully charged.

· Related Glossary

Jan 11, 2024

Ac impedance

Refers to the battery's alternating current impedance measured at a specific alternating current frequency, typically the alternating current impedance of the battery at 1 kHz.Note: Alternating current impedance is usually expressed in milliohms (mΩ).

Jan 11, 2024

Nominal voltage

An appropriate approximate voltage used to identify or characterize a battery or an electrochemical system.

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Crystallization polarization

Electrode polarization caused by crystal nucleation and growth phenomena.

Jan 11, 2024

Dc impedance

The resistance calculated as the ratio of the change in battery voltage over a short period of time to the corresponding discharge current under direct current (DC) operating conditions.Note: DC impedance is typically expressed in milliohms (mΩ).

Jan 10, 2024

Ohmic polarization

Electrode polarization caused by ohmic resistance when current passes through the electrode or electrolyte.

Jan 11, 2024

End-of-charge voltage

The maximum voltage allowed during the normal charging of a battery cell, module, battery pack, or system.

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