混合动力汽车磷酸铁锂动力电池建模与SOC计算

doi:10.12028/j.issn.2095-4239.2018.0056

储能科学与技术 ›› 2018, Vol. 7 ›› Issue (5): 897-901.doi: 10.12028/j.issn.2095-4239.2018.0056

混合动力汽车磷酸铁锂动力电池建模与SOC计算

蒋超宇¹, 王伟超², 杨学平¹

1 云南机电职业技术学院汽车技术工程系, 云南昆明 650101;
2 云南农业大学机电工程学院, 云南昆明 650203

收稿日期:2018-04-10 修回日期:2018-05-29 出版日期:2018-09-01 发布日期:2018-06-19
通讯作者: 王伟超,讲师,主要研究方向为内燃机电子控制,E-mail:287692950@qq.com
作者简介:蒋超宇(1989-),男,讲师,主要研究方向为新能源汽车技术,E-mail:83597167@qq.com
基金资助:
云南省科技厅基础青年项目（2018FD050）及云南省教育厅科学研究基金项目（2016ZDX170）。

Modeling and SOC calculations of hybrid electrical vehicles(HEV) powered by lithium iron phosphate batteries

JIANG Chaoyu¹, WANG Weichao², YANG Xueping¹

1 Automotive Technical Engineering Department, Yunnan Mechanical and Electrical Professional Technology Institute, Kunming 650101, Yunnan, China;
2 College of Mechanical and Electrical Engineening, Yunnan Agricultural University, Kunming 650203, Yunnan, China

Received:2018-04-10 Revised:2018-05-29 Online:2018-09-01 Published:2018-06-19
Contact: 10.12028/j.issn.2095-4239.2018.0056

摘要/Abstract

摘要： 为了准确和方便地研究混合动力汽车中的磷酸铁锂动力电池的性能，基于Thevenin电池模型，考虑了温度对模型的影响，通过库仑计数法估算电池荷电状态（SOC）。针对该电池，通过HPPC试验识别电池模型参数，在Matlab/Simulink中建立物理仿真模型进行仿真计算。研究表明：所使用的Thevenin电池模型精度高，对比模拟和实测端电压结果，两者变化趋势基本相同，端电压平均误差为3.6 V，最大误差为12.6 V，占电池额定电压0.79%，能真实的模拟电池充放电特性；结合库仑计数法计算电池SOC，能有效控制SOC的估算值在高精度范围内。模拟SOC和实测SOC结果进行对比表明，SOC精度保持在3%以内。

关键词: 混合动力汽车, 磷酸铁锂动力电池, Matlab/Simulink, SOC估计

Abstract: To study the performance of lithium iron phosphate batteries for hybrid electric vehicles, the Coulomb counting method is used to estimate the battery state of charge (SOC) on the basis of the Thevenin battery model, taking into account of the influence of temperature. The battery model parameters are identified through HPPC tests, the model is built and simulation performed in the Matlab/Simulink environment. The results show that the Thevenin battery model is of a high precision with the simulated and measured end voltage results in close agreement:the average error of the end voltage is 3.6 V, the maximum error is 12.6 V, accounting for 0.79% of the battery rated voltage. The simulated and the measured SOC results are shown to agree within 3%.

Key words: hybrid electric vehicle, lithium iron phosphate power battery, Matlab/Simulink, SOC estimation

中图分类号:

TK421

蒋超宇, 王伟超, 杨学平. 混合动力汽车磷酸铁锂动力电池建模与SOC计算[J]. 储能科学与技术, 2018, 7(5): 897-901.

JIANG Chaoyu, WANG Weichao, YANG Xueping. Modeling and SOC calculations of hybrid electrical vehicles(HEV) powered by lithium iron phosphate batteries[J]. Energy Storage Science and Technology, 2018, 7(5): 897-901.

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混合动力汽车磷酸铁锂动力电池建模与SOC计算

Modeling and SOC calculations of hybrid electrical vehicles(HEV) powered by lithium iron phosphate batteries

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