Lithium battery thermal management system for hybrid vehicles

doi:10.12028/j.issn.2095-4239.2018.0129

Abstract

Abstract: In order to study the temperature characteristics of the power battery pack and maintain its working temperature within the optimal temperature range, a lithium-ion battery is taken as the research object, and a battery thermal management system for the hybrid vehicle is proposed. The air conditioning system and the engine exhaust system are used to regulate the temperature of battery pack. A three-dimensional transient heat generation numerical model of the lithium battery pack was established. The size of the battery pack and the inlet air flow rate were used as input parameters to reduce the maximum temperature rise of the battery pack and improve the temperature uniformity of the battery pack as output parameters, In order to reduce the maximum temperature rise of the battery pack and increase the temperature uniformity, the structure of the battery pack was designed and optimized by using FLUENT simulation software and DesignXplorer module. The optimized temperature rise of the battery pack was 5.39 K lower than that before optimization, and the temperature difference was reduced by 6.41 K. The effects of constant rate discharge and convective heat transfer coefficient on the temperature rise were analyzed. The research shows that the higher the discharge rate, the faster the temperature rise of the battery. The higher the temperature of the battery after the discharge is completed, the heat dissipation effect is obvious when the convective heat transfer coefficient is less than 30 W/(m²·K). By the simulation analysis of the heating or cooling of the battery pack under different conditions, the feasibility of the battery thermal management system was verified.

Key words: hybrid vehicle, battery thermal management system, FLUENT, engine exhaust system, air conditioning system

CLC Number:

U469.72+2

ZHAO Guozhu, LI Liang, ZHAO Xiaohe, ZHOU Tingbo. Lithium battery thermal management system for hybrid vehicles[J]. Energy Storage Science and Technology, 2018, 7(6): 1146-1151.

References

[1] 匡勇, 刘霞, 钱振, 等. 锂离子电池产热特性理论模型研究进展[J]. 储能科学与技术, 2015, 4 (6):599-608. KUANG Yong, LIU Xia, QIAN Zhen, et al. Review on heat generation theory model of lithium-ion battery[J]. Energy Storage Science and Technology, 2015, 4 (6):599-608.
[2] ZHANG S, ZHAO R, LIU J, et al. Investigation on a hydromel based passive thermal management system for lithium ion batteries[J]. Energy, 2014, 68 (4):854-861.
[3] Greco A, CAO D, JIANG X, et al. A theoretical and computational study of lithium-ion battery thermal management for electric vehicles using heat pipes[J]. Journal of Power Sources, 2014, 257 (3):344-355.
[4] 金标, 姜斌, 刘方方, 等. 车用动力锂电池产热特性分析与优化[J]. 储能科学与技术, 2018, 7 (1):128-134. JIN Biao, JIANG Bin, LIU Fangfang, et al. Thermal characteristic analysis and optimization for vehicle power lithium battery[J]. Energy Storage Science and Technology, 2018, 7 (1):128-134.
[5] Pesaran A, Keyser M, Burch S. An approach for designing thermal management systems for electric and hybrid vehicle battery packs[R]. Office of Scientific & Technical Information Technical Reports, 1999.
[6] 张新强, 洪思慧, 汪双凤. 增设通风孔的风冷式锂离子电池热管理系统数值研究[J]. 新能源进展, 2015, 3 (6):422-428. ZHANG Xinqiang, HONG Sihui, WANG Shuangfeng. Numerical investigation of air-cooled cylindrical lithium-ion battery thermal management system with vent[J]. Advances In New and Renewable Energy, 2015, 3 (6):422-428.
[7] Chacko S, Chung Y M. Thermal modeling of Li-ion polymer battery for electric vehicle drive cycles[J]. Journal of Power Sources, 2012, 213 (9):296-303.
[8] RAO Z, WANG S. A review of power battery thermal energy management[J]. Renewable & Sustainable Energy Reviews, 2011, 15 (9):4554-4571.
[9] Park H. A design of air flow configuration for cooling lithium ion battery in hybrid electric vehicles[J]. Journal of Power Sources, 2013, 239:30-36.
[10] Zhao J, Rao Z, Li Y. Thermal performance of mini-channel liquid cooled cylinder based battery thermal management for cylindrical lithium-ion power battery[J]. Energy Conversion & Management, 2015, 103:157-165.
[11] FAN L, Khodadadi J M, Pesaran A A. A parametric study on thermal management of an air-cooled lithium-ion battery module for plug-in hybrid electric vehicles[J]. Journal of Power Sources, 2013, 238:301-312.
[12] WANG T, Tseng K J, Zhao J, et al. Thermal investigation of lithium-ion battery module with different cell arrangement structures and forced air-cooling strategies[J]. Applied Energy, 2014, 134:229-238.
[13] XU X M, HE R. Research on the heat dissipation performance of battery pack based on forced air cooling[J]. Journal of Power Sources, 2013, 240 (1):33-41.
[14] Newman J, Bernardi D, Pawlikowski E. A general energy-balance for battery systems[J]. Journal of the Electrochemical Society, 1985, 132 (1):5-12.