Abstract
In this study, the thermal behavior of a 1S18P battery pack is examined based on the power demand during train propulsion between two stations. The proposed thermal prediction model is classified into Joules heating with equivalent resistance, reversible heat, and heat dissipation. The equivalent resistances are determined by 5% of the state of charge intervals using the hybrid pulse power characterization test. The power demand profile during train propulsion between two stations is provided by the Korea Railroad Research Institute. An experiment is conducted to examine the 1S18P battery pack thermal behavior during the propulsion between two stations. A comparison of the simulation and experiment results validated the proposed thermal model.
Highlights
Lithium-ion batteries have emerged as alternative power sources for commercial transportation applications, such as battery powered trains and electrical vehicles (EV), due to their power and energy densities
A standard load profile of a battery powered train is introduced, and thermal prediction of a 1S18P lithium ion battery pack is examined under the power demand profile during the train propulsion between two stations
80%. state, The capacity test discharged to 2.5 V with 1 C-rate, and this was followed by 1 h of rest prior to charging to state of charge (SOC) 80%
Summary
Lithium-ion batteries have emerged as alternative power sources for commercial transportation applications, such as battery powered trains and electrical vehicles (EV), due to their power and energy densities. A battery-powered train can lead to savings with respect to train cable installation For transportation applications, such as EV and battery-powered trains, lithium-ion batteries are formed into battery packs to satisfy the required power and energy density. In addition to the Joule heat generation and reversible heat generation, heat dissipation is an important factor for the thermal analysis of lithium-ion batteries. Studies on the thermal analysis of lithium-ion batteries for a single cell and battery pack have concentrated on the constant discharge and charge current. A standard load profile of a battery powered train is introduced, and thermal prediction of a 1S18P lithium ion battery pack is examined under the power demand profile during the train propulsion between two stations. The proposed battery pack thermal model under varying loads is validated via comparing simulations and experimental results
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