Design, Optimization, and Validation of GaN-Based DAB Converter for Active Cell Balancing in BTMS Applications: Preprint

Conference · Tue Dec 12 00:00:00 EST 2023

OSTI ID:2246631

Hasan, Syed Imam; Uzum, Alper; Haque, Md Ehsanul; Rahman, Mohammad Arifur; Siddiquee, Ashraf; Kisacikoglu, Mithat John; Sozer, Yilmaz

This paper focuses on the design of a bidirectional dual active bridge (DAB) DC/DC converter that utilizes Gallium Nitride (GaN) switches as active components. In the existing literature, MOSFET-based DAB for active cell balancing is available, but GaN-based DAB converter for active cell balancing is still new. The proposed modular isolated GaN-based DAB converter is designed as an individual module of active cell balancing for behind-the-meter storage (BTMS) applications, targeting high-power charging stations. Modular isolated converters are connected to each cell (low voltage bus), and each cell is connected in series to build up a battery module. According to the reference current command of supervisory control, each DAB converter can transfer power back and forth through the high voltage (HV) bus to balance the State of Charge (SoC) between the cells. Each module DAB converter is designed at a 50W power rating. Switch power and transformer losses are analyzed for different switching frequencies, showing the optimum switching frequency for minimum losses. Furthermore, the procedure to select the required gate driver and the PCB layout optimization are discussed. Finally, the DAB performance analysis of GaNbased DAB and Si-based DAB is provided for a battery module operating with a LiFeMnPO4 prismatic cell with 3.2V 20Ah rated values.

• Research Organization: National Renewable Energy Laboratory (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
• DOE Contract Number: AC36-08GO28308
• OSTI ID: 2246631
• Report Number(s): NREL/CP-5400-87899; MainId:88674; UUID:17802040-6afa-4582-8002-f6b817f6cfed; MainAdminID:70984
• Conference Information: Presented at the IEEE Energy Conversion Congress and Exposition (ECCE), 29 October - 2 November 2023, Nashville, Tennessee
• Country of Publication: United States
• Language: English

Related Subjects

active cell balancing
ADVANCED PROPULSION SYSTEMS
ENERGY STORAGE
behind-the-meter storage
bidirectional DC/DC converter
dual active bridge
field effect transistor
gallium nitride
LiFeMnPO4 prismatic cell
state of charge