Browse Publications Technical Papers 2019-01-0867
2019-04-02

Design of a Grid-Friendly DC Fast Charge Station with Second Life Batteries 2019-01-0867

DC-fast charge (DCFC) may be amenable for widespread EV adoption. However, there are potential challenges associated with implementation and operation of the DCFC infrastructures. The integration of energy storage systems can limit the scale of grid installation required for DCFC and enable more efficient grid energy usage. In addition, second-life batteries (SLBs) can find application in DCFC, significantly reducing installation cost when compared to solutions based on new battery packs. However, both system architecture and control strategy require optimization to ensure an optimal use of SLBs, including degradation and thermal aspects. This study proposes an application of automotive SLBs for DCFC stations where high power grid connection is not available or feasible. Several SLBs are connected to the grid by means of low power chargers (e.g. L2 charging station), and a DC/DC converter controls the power to the EV power dispenser. The architecture of the DC bus, the size and state of health of the battery system determine efficiency, cost, and reliability of the station. A technical and economic comparison is proposed, evaluating solutions with different battery pack sizes and control strategies. An accurate numerical model is used to evaluate the performance of the different architectures. A realistic usage profile of the charging station is defined and real-world scenarios are considered for the SLB parameters.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Repurposing Batteries of Plug-In Electric Vehicles to Support Renewable Energy Penetration in the Electric Grid

2012-01-0348

View Details

TECHNICAL PAPER

Design and Control of Commuter Plug-In FC Hybrid Vehicle

2007-24-0079

View Details

TECHNICAL PAPER

Hybrid Power Supplies of Electro-Mobiles

2007-01-1316

View Details

X