| 基于老化仿真的电动汽车新型双源电池系统全生命周期成本研究 |
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| 引用本文： | 周维,陈正,黄鹏,胡晓松.基于老化仿真的电动汽车新型双源电池系统全生命周期成本研究[J].中国公路学报,2022,35(8):1-10. |
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| 作者姓名： | 周维 陈正 黄鹏 胡晓松 |
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| 作者单位： | 1. 湖南大学 机械与运载工程学院, 湖南 长沙 410082;2. 重庆大学 汽车工程学院, 重庆 400044 |
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| 基金项目： | 国家自然科学基金项目(51705139,51875054) |
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| 摘 要： | 为了降低换电技术的实施难度和成本,提出一种采用"部分换电"思路的电动汽车新型双源电池系统。通过合适的控制策略,在保证动力平稳输出的情况下,调整电机功率以匹配主、副电池包的端电压,实现供电电池包的灵活切换。为探究双源电池系统的老化规律以及验证其在全生命周期成本上的优势,匹配"大主电池包+小副电池包"和"小主电池包+大副电池包"2种双源电池系统方案,设计具有代表性的城市、城郊和高速等行驶场景以及工作日、休息日的出行和充电方案;采用AutoLion-ST软件建立双源电池包和相同总容量的单个大电池包的电化学老化机理模型,嵌入到AVL/Cruise搭建整车仿真平台中进行联合仿真。研究结果表明:虽然所提出的双源电池系统相比单个大电池包在相同工况中的放电倍率和深度更大,导致老化速率略有加快,但由于双源电池系统中主、副电池包的利用率更高,其全寿命里程之和相比单个大电池包方案反而有17%以上的提升;结合电池梯次利用模型和近年来电池价格的统计结果对全生命周期成本进行计算,认为双源电池系统方案在保证换电运营商获得一定盈利空间的情况下,可以降低全生命周期总拥有成本。
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| 关 键 词： | 汽车工程 双源电池系统 电池老化仿真 全生命周期成本 换电 |
| 收稿时间： | 2020-11-23 |
Full Life-cycle Cost of Dual-source Battery System for Electric Vehicles Based on Aging Simulation |
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| ZHOU Wei,CHEN Zheng,HUANG Peng,HU Xiao-song.Full Life-cycle Cost of Dual-source Battery System for Electric Vehicles Based on Aging Simulation[J].China Journal of Highway and Transport,2022,35(8):1-10. |
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| Authors: | ZHOU Wei CHEN Zheng HUANG Peng HU Xiao-song |
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| Affiliation: | 1. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, Hunan, China;2. School of Automotive Engineering, Chongqing University, Chongqing 400044, China |
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| Abstract: | To reduce the implementation difficulty and cost of battery replacement technology,this study proposes a novel dual-source battery system (DSBS) for electric vehicles based on the concept of "partial battery replacement".By applying an appropriate control strategy,this system can adjust the motor power to match the terminal voltage of the main and auxiliary battery packs,thereby flexibly switching the battery pack that supplies power without any abrupt change in the power output.To study the aging law of the DSBS and demonstrate its advantages in terms of full life-cycle cost,two DSBS schemes were considered,namely "large main battery pack+small auxiliary battery pack" and "small main battery pack+large auxiliary battery pack;" additionally,representative urban,suburban,and high-speed driving scenes,as well as travel and charging schemes for weekdays and weekends were designed.A high-fidelity electrochemical-aging models for the DSBS and a single large battery pack with the same total capacity were established using AutoLion-ST,which were then embedded into a vehicle model built in AVL/Cruise to perform co-simulation.The results indicate that under the same working conditions,the DSBS exhibits a larger discharge rate and depth than that of the single large battery pack,resulting in a slightly accelerated aging rate.However,owing to the better utilization of the main and auxiliary battery packs in the DSBS,the full life mileage can be increased by more than 17% in comparison with that of the single large battery pack.Combining the battery secondary-use model with the statistics of battery price in recent years,the full life-cycle costs of the DSBS and single large battery pack were calculated.The results reveal that the DSBS can reduce the total cost of ownership of the vehicle while ensuring that the battery replacement service has a certain profit margin. |
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| Keywords: | automotive engineering dual-source battery system battery aging simulation full life cycle cost battery pack replacement |
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