Battery power management in heavy-duty HEVs based on the estimated critical surface charge. (7th December 2012)

• Record Type: Journal Article
• Authors: Lee, Tae-Kyung; Kim, Youngki; Rizzo, Denise M.; Filipi, Zoran S.
• Is Part Of: International journal of vehicle design. Volume 61:Number 1/2/3/4(2013)
• Page Start: 108
• Page End: 127
• Publication Date: 2012-12-07
• Subjects: lithium-ion battery -- power management -- CSC -- critical surface charge -- lithium-ion concentration -- estimation -- EKF -- extended Kalman filter -- HEV -- hybrid electric vehicle; Motor vehicles -- Design and construction -- Periodicals; 629.231
• Languages: English
• ISSNs: 0143-3369

Abstract

This paper proposes a battery power management strategy using Critical Surface Charge (CSC) information estimated by Extended Kalman Filter (EKF) in real time. The insight from CSC characterisation is used to propose a novel approach for supervisory control design of a series Hybrid Electric Vehicle (HEV). The underlying phenomenon determining the battery allowable power limits is closely connected to the CSC. The estimated CSC is processed with a Finite Impulse Response (FIR) filter to smoothen short-term fluctuations and highlight longer-term trajectories. The battery allowable power limits are adjusted based on the filtered CSC information to prevent undesirable battery operations.