Cost-Effective Integration of Second-life EV Batteries with Solar PV Systems for Commercial Buildings
Developing battery management system technologies, algorithms, and operation strategies to extend the second-life of EV batteries.
SDSU have completed about 5430 aging cycles after 17 months of aging tests of the second-life batteries, which is equivalent to 17.8 years of real operation. SDSU is in the process of validating the second-life EV batteries for PV storage applications.
This project pairs second-life EV batteries with a solar PV system and develops key technologies to quickly identify battery health and optimize usage. These key technologies include developing control and operation algorithms to enable 1) proactive maintenance, 2) predictive thermal management, 3) active cell balancing, and 4) dynamic demand response management. Together, these technological advancements extend the life of the repurposed EV batteries and lower the cost to California ratepayers. The goal is to ensure that second-life EV batteries will last for a minimum of 10 years as part of a grid storage application with a degradation rate of 3% or less annually.
This project will help commercial customers significantly reduce their electricity bills through novel battery energy storage system operating and sizing algorithms, thus promoting the deployment of lower-cost energy storage syst
This project is demonstrating and validating that the second life EV battery integrated with solar PV can operate reliably, support grid needs, and provide energy resilience to commercial buildings to serve their critical energy