Post-deterioration performance estimator and post-deterioration performance estimation method for an energy storage device and energy storage system

摘要

A post-degradation performance estimator (100) is configured to estimate a post-degradation performance value indicative of performance of an energy storage device (200) at a predetermined degradation point. The discharge capacity of the energy storage device (200) discharging with a predetermined first current is called an energy storage capacity, the discharge capacity of the energy storage device (200) discharging with a second current whose current value is smaller than that of the first current is called a small current discharge capacity, and a relational one Expressing the relationship between the initial capacity of the energy storage device (200), a first capacity-reduced amount obtained by subtracting the small current discharge capacity from the initial capacity, a second capacity-reduced size obtained by subtracting the energy storage capacity from the small current discharge capacity and a cumulative period of operation of the energy storage device (200) is referred to as a first relational expression. The post-deterioration performance estimator (100) includes a post-deterioration performance estimator (120) configured to calculate the post-deterioration performance value at the deterioration point in accordance with the first relational expression and the cumulative operation period at the deterioration point appreciate.