State of charge

Latest updated: Sep 24, 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 12, 2024

Discharge capacity

The capacity value of a battery's output measured under specified conditions.Note: Discharge capacity is typically expressed in ampere-hours (Ah) or milliampere-hours (mAh).

Jan 12, 2024

Rated capacity

The capacity value of a battery cell, module, battery pack, or system measured under conditions specified by the manufacturer and declared by the manufacturer.Note: Rated capacity is typically expressed in ampere-hours (Ah) or milliampere-hours (mAh).

Jan 12, 2024

Residual capacity

The remaining capacity of a battery that can be discharged when the battery has been used for a period of time under specified conditions (such as discharge or storage) before continuing to discharge.

Jan 12, 2024

Recovery capacity

The capacity that can be discharged from a battery after it has been fully charged under specified conditions, allowed to stand for a specified time at a specified temperature, then fully recharged, and discharged again.

Jan 12, 2024

Capacity per gram

The capacity released by the internal active material of a battery during discharge divided by the mass of the active material.Note: Specific capacity is typically expressed in milliampere-hours per gram (mAh/g). Sometimes, the calculation of specific capacity includes the mass of all non-active materials, such as conductive additives and binders.

Jan 12, 2024

Gravimetric energy

The ratio of a battery's energy to its mass. Also known as "mass energy density."

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