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王顺利,胡宜芬.航空锂离子电池组过放电工作特性研究[J].电源学报,2018,16(4):162-167
航空锂离子电池组过放电工作特性研究
Study on Operating Characteristics of Over-discharging Aero Lithium-ion Battery Packs
投稿时间:2016-05-31  修订日期:2018-01-10
DOI:10.13234/j.issn.2095-2805.2018.4.162
中文关键词:  航空锂离子电池组  过放电  工作特性  状态估计  输出电压跟踪
英文关键词:aero lithium-ion battery packs  over-discharge  operating characteristic  state estimation  output voltage tracking
基金项目:四川省教育厅科研资助项目(17ZB0453);四川省科技厅资助项目(2017FZ0013);绵阳市科技计划资助项目(15G-03-3)
作者单位E-mail
王顺利 西南科技大学信息工程学院特殊环境机器人技术四川省重点实验室, 绵阳 621010  
胡宜芬 信阳职业技术学院汽车与机电工程学院, 信阳 454000 huyifen@126.com 
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中文摘要:
      航空锂离子电池组工作不同于通常动力锂离子电池组,是长时间搁置、间歇补充电和瞬时大电流放电的工作状态,其过放电工作特性对能量管理和航空安全至关重要。基于反应机理分析和过放电实验研究,通过电池等效模型构建和状态空间描述,实现过放电过程分析,获得极限条件下的电池工作特性。通过使用7串45 Ah航空锂离子电池组进行测试验证该方法的可行性和精度。实验结果表明,在电池组过放电过程中,输出电压存在缓慢变化、快速变化和陡坡变化3个阶段,输出电压跟踪误差低于5%,确定放电截至电压(拐点)为20.14 V;通过宽温度范围工作特性的研究,确立最佳工作温度范围为5~35℃,基于加热片和散热器的方式实现了其最佳温度范围控制。该方法能够实现对过放电特性准确数学描述,有效分析航空锂离子电池组的工作特性,提供工作特征突变关键点监测方法,为航空安全的关键性突破奠定基础。
英文摘要:
      With the operating characteristics of long time abeyance, intermittent recharge and instantaneously large current discharge, the operation of aero lithium-ion battery packs is different from that of the conventional power lithium batteries. Therefore, its over-discharging characteristics are essential for the energy management and aviation security. In this paper, based on the analysis of reaction mechanism and the experimental study on over-discharge, the over-discharging process was analyzed through the establishment of a battery equivalent model and the description of state-space, and the operating characteristics of batteries under extreme conditions were obtained. The feasibility and accuracy of the proposed method were verified through tests on 45 Ah aero lithium-ion battery packs of 7 cells. Experimental results showed that, in the over-discharging process of battery packs, the output voltage was divided into three stages, i.e., slow, rapid and steep changes; the output voltage tracking error was less than 5%, and the discharge cut-off voltage (i.e., inflection point) was determined as 20.14 V; through studying the operating characteristics in a wide temperature range, the optimum operating temperature range was identified as 5~35℃, the control of which can be achieved by means of heater bands and radiators. This method can realize an accurate mathematical description of the over-discharging characteristics and an effective analysis of the operating characteristics of aero lithium-ion battery packs, which provides a monitoring method for key mutations in operating characteristics and lays a foundation for break-throughs in aviation security.
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