What is a battery degradation cost function?

This paper proposes a new formulation of the battery degradation cost for the optimal scheduling of BESSs. To this end, we define (1) a one-cycle battery cost function based on the cycle life curve and (2) an auxiliary state of charge (SoC) that tracks the actual SoC only upon discharge.

How to model degradation of a battery?

Traditionally two main methods to model degradation have been used: the Ah throughput method , and the method of cycle life vs. DOD power function , , . In the first method, it is assumed that a certain amount of energy can be cycled through a battery before its end of life, irrespective of the depth of discharge.

What is the objective based approach to battery degradation?

In the objective-based approach, the cost of battery degradation is included as an economic cost in the objective function. Traditionally two main methods to model degradation have been used: the Ah throughput method , and the method of cycle life vs. DOD power function , , .

Does a battery enter a rapid degradation stage?

Degradation stage detection and life prediction are important for battery health management and safe reuse. This study first proposes a method of detecting whether a battery has entered a rapid degradation stage without accessing historical operating data.

What is battery degradation?

When the capacity of a battery is about 70–80 % of the original capacity, it is usually retired from its primary application. In this work, degradation refers to the loss of capacity that a battery experiences. This work is a short-term study where the operational strategy of a battery is optimised.

Is battery degradation cost a differentiable form?

Based on this estimation method, we herein formulate the battery degradation cost as a differentiable form by defining a one-cycle cost function of cycle life reduction and an auxiliary SoC that selectively follows the actual SoC only for discharge.