摘要
为延长电池使用寿命并在复杂工况环境下保证车辆的用电安全,在分析了温度对电池组性能的影响及热管理系统要实现的功能后,对电动汽车电池组热管理系统(BTMS)散热结构布局进行了改进。利用Fluent软件对多种结构方案进行模拟计算,比较了调整气流通道的间隔距离以及空气导流板与水平面夹角的结构变动对流速分布的影响,然后选出空气流速均匀性最好的结构方案。同时设计了BTMS的控制流程,即在低温下小电流充电预热,高温打开风机散热,并在系统过热时自动报警。最后,通过实验表明该方案能使电池温差控制在3℃以内,完全可满足日常的需求。
In order to extend battery life and working conditions in the complex environment,this paper analyzed the effect of temperature on battery performance and thermal management system to achieve the function,of the BTMS and improved heat dissipation structure layout.Fluent software was used to simulate variety of structural programs,to analyzed to adjust the interval distance the flow channel and the impact of the structure changes of the tilt angle of air deflector on the velocity distribution,and then the program was selected for the best flow uniformity of the structure.Also the battery pack thermal management system was designed.Finally,the experiments show that the scheme can make the battery temperature control within 3 ℃,fully meet the daily needs.
出处
《实验室研究与探索》
CAS
北大核心
2011年第6期8-10,14,共4页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(50877054)
关键词
电动汽车动力电池组
热管理系统
散热结构
电池温差
electric vehicle battery pack
thermal management system
cooling structure
battery temperature
