Device and method for predicting state-of-health of battery

An energy storage system (ESS) state of health (SOH) prediction device comprising:

• a plurality of actual energy storage systems (ESSs);
• and
• an analysis unit for measuring and analyzing charging/discharging cycle data from each of the plurality of actual ESSs,
• wherein the analysis unit comprises:
• a virtual capacity division unit for virtually dividing a capacity of the ESS to be measured into two or more capacity ranges;
• a reference voltage setting unit for setting a first reference voltage and a second reference voltage matching the divided capacitance range;
• and
• an ESS SOH prediction unit for predicting the SOH of the ESS from the inputted charging/discharging cycle data,
• wherein the number of actual ESSs is equal to or greater than the number of capacity ranges divided by the virtual capacity division unit, and
• wherein the analysis unit transmits a first reference voltage and a second reference voltage matching the divided capacity range to the plurality of actual ESSs and repeats the charging or discharging process of each actual ESS to measure divided capacity range-dependent charging/discharging cycle data.

An energy storage system (ESS) state of health (SOH) prediction device comprising:

• a plurality of actual energy storage systems (ESSs);
• and
• an analysis unit for measuring and analyzing charging/discharging cycle data from each of the plurality of actual ESSs,
• wherein the analysis unit comprises:
• a virtual capacity division unit for virtually dividing the capacity of the ESS to be measured into two or more capacity ranges;
• a reference voltage setting unit for setting a first reference voltage and a second reference voltage matching the divided capacitance range;
• and
• an ESS SOH prediction unit for predicting the SOH of the ESS from the inputted charging/discharging cycle data,
• wherein the number of the two or more capacity ranges divided by the virtual capacity division unit is equal to or less than the actual ESS number, and
• wherein the analysis unit transmits a first reference voltage and a second reference voltage matching the divided capacity range to the plurality of actual ESSs and repeats the charging or discharging process of each actual ESS to measure divided capacity range-dependent charging/discharging cycle data.