DAB Converter Integrating Trapezoidal-Wave Internal Heating Inverter for Automotive Lithium-Ion Batteries at Subzero Temperatures

Adequate preheating for electric vehicles' lithium-ion batteries (LIBs) in cold climates is indispensable to prevent a decrease in cruising distance. Internal ac heating techniques utilizing Joule heat originating from LIBs' internal resistances have been proposed as an efficient and rapid...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on industry applications Vol. 59; no. 6; pp. 1 - 13
Main Authors Uno, Masatoshi, Sasama, Yuta
Format Journal Article
LanguageEnglish
Published New York IEEE 01.11.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Automobiles
Circuits
Cold weather
DC-DC power converters
Dual active bridge (DAB) converter
Electric bridges
Electric converters
Electric vehicles
Energy conversion
Heat transfer
Heating
Heating systems
Inductors
internal heating
Inverters
Lithium-ion batteries
lithium-ion battery (LIB)
low temperature
Rechargeable batteries
Switches
trapezoidal wave
Voltage
Online AccessGet full text

Cover

More Information
Summary:Adequate preheating for electric vehicles' lithium-ion batteries (LIBs) in cold climates is indispensable to prevent a decrease in cruising distance. Internal ac heating techniques utilizing Joule heat originating from LIBs' internal resistances have been proposed as an efficient and rapid heating method. However, an additional inverter is necessary to generate ac currents, resulting in increased system complexity. Furthermore, conventional triangular and sinusoidal current waves are not ideal as their rms values at a given peak current are relatively low. This article proposes a dual active bridge (DAB) converter integrating an ac internal heating inverter. A full-bridge circuit is utilized not only for the DAB converter but also for the ac heating inverter, achieving a simplified system. A novel PWM technique is also proposed to generate a trapezoidal current wave that achieves higher rms currents at a given peak current. A 400-W prototype with 50-W internal heating capability was built for a 48-V 3400-mAh LIB. Experimental results demonstrated that, in addition to the bidirectional power conversion capability, the trapezoidal wave could warm up the LIB from −10°C to 0°C in 2.6 minutes.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2023.3299904