Thermal performance of axial air cooling system with bionic surface structure for cylindrical lithium-ion battery module

Lithium-ion battery packs are made by many batteries, and the difficulty in heat transfer can cause many safety issues. It is important to evaluate thermal performance of a battery pack in designing process. Here, a multiscale method combining a pseudo-two-dimensional model of individual battery and three-dimensional computational fluid dynamics is employed to describe heat generation and transfer in a battery pack. The effect of battery arrangement on the thermal performance of battery packs is investigated. We discuss the air-cooling effect of the pack with four battery arrangements which include one square arrangement, one stagger arrangement and two trapezoid arrangements. In addition, the air-cooling strategy is studied by observing temperature distribution of the battery pack. It is found that the square arrangement is the structure with the best air-cooling effect, and the cooling effect is best when the cold air inlet is at the top of the battery pack. We hope that this work can provide theoretical guidance for thermal management of lithium-ion battery packs.

Download Full-text

Modeling the Effect of the Design of Air Cooling Channels on the Thermal Behavior of a Lithium-Ion Battery Module

ECS Meeting Abstracts ◽

10.1149/ma2017-01/1/83 ◽

2017 ◽

Keyword(s):

Thermal Behavior ◽

Lithium Ion Battery ◽

Lithium Ion ◽

Air Cooling ◽

Cooling Channels ◽

Battery Module

Download Full-text

Temperature Distribution Optimization of an Air-Cooling Lithium-Ion Battery Pack in Electric Vehicles Based on the Response Surface Method

Journal of Electrochemical Energy Conversion and Storage ◽

10.1115/1.4042922 ◽

2019 ◽

Vol 16 (4) ◽

Cited By ~ 6

Author(s):

Xiangping Liao ◽

Chong Ma ◽

Xiongbin Peng ◽

Akhil Garg ◽

Nengsheng Bao

Keyword(s):

Temperature Distribution ◽

Lithium Ion Battery ◽

Electric Vehicles ◽

Cooling System ◽

Lithium Ion ◽

Battery Pack ◽

Maximum Temperature ◽

Air Cooling ◽

Optimized Design ◽

Original Design

Electric vehicles have become a trend in recent years, and the lithium-ion battery pack provides them with high power and energy. The battery thermal system with air cooling was always used to prevent the high temperature of the battery pack to avoid cycle life reduction and safety issues of lithium-ion batteries. This work employed an easily applied optimization method to design a more efficient battery pack with lower temperature and more uniform temperature distribution. The proposed method consisted of four steps: the air-cooling system design, computational fluid dynamics code setups, selection of surrogate models, and optimization of the battery pack. The investigated battery pack contained eight prismatic cells, and the cells were discharged under normal driving conditions. It was shown that the optimized design performs a lower maximum temperature of 2.7 K reduction and a smaller temperature standard deviation of 0.3 K reduction than the original design. This methodology can also be implemented in industries where the battery pack contains more battery cells.

Download Full-text