New Electro-Thermal Battery Pack Model of an Electric Vehicle

Abstract

Abstract:Since the evolution of the electric and hybrid vehicle, the analysis of batteries' characteristics and influence on driving range has become essential. This fact advocates the necessity of accurate simulation modeling for batteries. Different models for the Li-ion battery cell are reviewed in this paper and a group of the highly dynamic models is selected for comparison. A new open circuit voltage (OCV) model is proposed. The new model can simulate the OCV curves of lithium iron magnesium phosphate (LiFeMgPO 4 ) battery type at different temperatures. It also considers both charging and discharging cases. The most remarkable features from different models, in addition to the proposed OCV model, are integrated in a single hybrid electrical model. A lumped thermal model is implemented to simulate the temperature development in the battery cell. The synthesized electro-thermal battery cell model is extended to model a battery pack of an actual electric vehicle. Experimental tests on the battery, as well as drive tests on the vehicle are performed. The proposed model demonstrates a higher modeling accuracy, for the battery pack voltage, than the constituent models under extreme maneuver drive tests.

The effect of external compressive loads on the cycle lifetime of lithium-ion pouch cells

“…Much of the literature has therefore focused on 3D thermal modelling of battery packs [2, [7][8][9][10] and designing thermal management systems gradients in the solid phase, which is linked to particle fracturing and hence capacity and power fade through the isolation of electrode material, and contact loss, respectively [18,19].…”

Optimization of Tremblay's battery model parameters for plug-in hybrid electric vehicle applications

“…Electrochemical models emulate the static characteristics of a PHEV battery using mathematical equations that relate to the chemical reactions inside the battery [17]. These models cannot accurately simulate the battery's dynamic response [18] and require high computational power to solve the associated nonlinear partial differential equations [19]. The circuit-based models provide reasonable accuracy and robustness in simulating the dynamics of the battery [20]- [22].…”

Integrated Equivalent Circuit and Thermal Model for Simulation of Temperature-Dependent LiFePO4 Battery in Actual Embedded Application

“…The series connected cells' capacity is the quantity of electric charge stored in the cells. Theoretically, the series battery capacity is given by the sum of the minimum capacity that can be charged and discharged [2]:…”

“…In recent years, interest has increased for lithium-ion (Li-ion) batteries [1][2][3] in power generation and renewable energy applications such as solar energy systems, wave-operated electrical generation systems, wind turbines, battery electric vehicles (BEVs), and portable power storage devices. Compared with other commonly used batteries like lead acid, nickel cadmium (NiCd) and nickel metal hydride (NiMH), LiFePO 4 is popular due to its high capacity, low self-discharge current, wide temperature operation range, and long service life that make them better candidates for many applications.…”