System and method for calibrating battery state of charge

A system for calibrating state-of-charge (SOC) of an energy storage device, the system comprising:

• one or more sensors configured to monitor at least one of an accumulated capacity of the energy storage device after a first SOC calibration or a time period after the first SOC calibration;
• and
• a controller configured to perform one or more operations, the one or more operations comprising:
• determining whether at least one of the accumulated capacity or the time period is above a predetermined threshold;
• and
• if at least one of the accumulated capacity or the time period is above the predetermined threshold, charging the energy storage device for a specified duration until the energy storage device reaches a second SOC calibration.

A battery management system for an electric vehicle, the battery management system comprising:

• a controller configured to perform one or more operations so as to calibrate a state-of-charge (SOC) of a battery, the one or more operations comprising:
• determining whether at least one of an accumulated capacity of the battery after a first top-of-charge (TOC) reset or the time period after the first TOC reset is above a predetermined threshold;
• and
• if at least one of the accumulated capacity or the time period is above the predetermined threshold, charging the battery for a specified duration until the battery reaches a second top-of-charge (TOC) reset.