Abstract
An effective battery thermal management system (BTMS) is essential to ensure that the battery pack operates within the normal temperature range, especially for multi-cell batteries. This paper studied the optimal configuration of an air-cooling (AC) system for a cylindrical battery pack. The thermal parameters of the single battery were measured experimentally. The heat dissipation performance of a single battery was analyzed and compared with the simulation results. The experimental and simulation results were in good agreement, which proves the validity of the computational fluid dynamics (CFD) model. Various schemes with different battery arrangements, different positions of the inlet and outlet of the cooling system and the number of inlets and outlets were compared. The results showed that an arrangement that uses a small length-width ratio is more conducive to promoting the performance of the cooling system. The inlet and outlet configuration of the cooling system, which facilitates fluid flow over most of the battery pack over shorter distances is more beneficial to battery thermal management. The configuration of a large number of inlets and outlets can facilitate more flexible adjustment of the fluid flow state and can slow down battery heating to a greater extent.
Highlights
The performance of the lithium-ion battery (LIB) is at the core of the driving system of an electric vehicle, and it significantly affects the driving range and service life of electric vehicles [1,2].Among the many factors that determine battery performance, the influence of temperature on the battery should not be underestimated [3]
If an abnormal amount of heat is generated or the heat does not dissipate in time, the battery suffers overheating, which may potentially cause the active material on the electrodes to peel off and promote electrolyte degradation, that is, cause harm to the battery itself [7,8,9]
The main aim of this study is to reduce the maximum temperature temperature (MaxT) and temperature standard deviation (TSD) of the
Summary
The performance of the lithium-ion battery (LIB) is at the core of the driving system of an electric vehicle, and it significantly affects the driving range and service life of electric vehicles [1,2].Among the many factors that determine battery performance, the influence of temperature on the battery should not be underestimated [3]. If an abnormal amount of heat is generated or the heat does not dissipate in time, the battery suffers overheating, which may potentially cause the active material on the electrodes to peel off and promote electrolyte degradation, that is, cause harm to the battery itself [7,8,9]. These changes are irreversible and can cause permanent damage to the battery
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