Study on a High-Accuracy Real-Time Algorithm to Estimate SOC of Multiple Battery Cells Simultaneously
In traditional battery equalization strategy, open-circuit voltage (OCV) of battery cells was used to judge the difference of SOC between them. However, OCV is not only determined by SOC but also influenced by internal resistance, polarization voltage, capacity, and other nonlinear factors. As a res...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2017-01-01
|
| Series: | Journal of Control Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2017/5390149 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850211973286854656 |
|---|---|
| author | Yong Luo Yingzhe Kan Yanli Yin Li Liu Huanyu Cui Fei Wu |
| author_facet | Yong Luo Yingzhe Kan Yanli Yin Li Liu Huanyu Cui Fei Wu |
| author_sort | Yong Luo |
| collection | DOAJ |
| description | In traditional battery equalization strategy, open-circuit voltage (OCV) of battery cells was used to judge the difference of SOC between them. However, OCV is not only determined by SOC but also influenced by internal resistance, polarization voltage, capacity, and other nonlinear factors. As a result, OCV is not an ideal indicator of SOC differences, especially in transient conditions. In order to control battery consistency accurately, it is best to use SOC directly as standard for battery consistency judgment and control. To achieve this, an algorithm that can estimate SOC of multiple battery cells simultaneously with low computational complexity and high accuracy is needed. Limited by computing speed of Battery Control Unit (BCU), existing SOC estimation method is hard to estimate SOC of each battery cell simultaneously with high accuracy. In this research, a new SOC estimation strategy was proposed to estimate SOC of multiple battery cells simultaneously for battery equalization control. Battery model is established based on experimental data, and a processor-in-the-loop test system was established to verify the actual performance of the proposed algorithm. Results of simulation and test indicate that the proposed algorithm can estimate SOC of multiple battery cells simultaneously and achieved good real-time performance and high accuracy. |
| format | Article |
| id | doaj-art-8b1370d2aee24eeeab336ef82485d514 |
| institution | OA Journals |
| issn | 1687-5249 1687-5257 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Control Science and Engineering |
| spelling | doaj-art-8b1370d2aee24eeeab336ef82485d5142025-08-20T02:09:27ZengWileyJournal of Control Science and Engineering1687-52491687-52572017-01-01201710.1155/2017/53901495390149Study on a High-Accuracy Real-Time Algorithm to Estimate SOC of Multiple Battery Cells SimultaneouslyYong Luo0Yingzhe Kan1Yanli Yin2Li Liu3Huanyu Cui4Fei Wu5Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology, Chongqing 400054, ChinaKey Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology, Chongqing 400054, ChinaSchool of Mechatronics & Vehicle Engineering, Chongqing Jiaotong University, Chongqing 400054, ChinaKey Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology, Chongqing 400054, ChinaKey Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology, Chongqing 400054, ChinaKey Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology, Chongqing 400054, ChinaIn traditional battery equalization strategy, open-circuit voltage (OCV) of battery cells was used to judge the difference of SOC between them. However, OCV is not only determined by SOC but also influenced by internal resistance, polarization voltage, capacity, and other nonlinear factors. As a result, OCV is not an ideal indicator of SOC differences, especially in transient conditions. In order to control battery consistency accurately, it is best to use SOC directly as standard for battery consistency judgment and control. To achieve this, an algorithm that can estimate SOC of multiple battery cells simultaneously with low computational complexity and high accuracy is needed. Limited by computing speed of Battery Control Unit (BCU), existing SOC estimation method is hard to estimate SOC of each battery cell simultaneously with high accuracy. In this research, a new SOC estimation strategy was proposed to estimate SOC of multiple battery cells simultaneously for battery equalization control. Battery model is established based on experimental data, and a processor-in-the-loop test system was established to verify the actual performance of the proposed algorithm. Results of simulation and test indicate that the proposed algorithm can estimate SOC of multiple battery cells simultaneously and achieved good real-time performance and high accuracy.http://dx.doi.org/10.1155/2017/5390149 |
| spellingShingle | Yong Luo Yingzhe Kan Yanli Yin Li Liu Huanyu Cui Fei Wu Study on a High-Accuracy Real-Time Algorithm to Estimate SOC of Multiple Battery Cells Simultaneously Journal of Control Science and Engineering |
| title | Study on a High-Accuracy Real-Time Algorithm to Estimate SOC of Multiple Battery Cells Simultaneously |
| title_full | Study on a High-Accuracy Real-Time Algorithm to Estimate SOC of Multiple Battery Cells Simultaneously |
| title_fullStr | Study on a High-Accuracy Real-Time Algorithm to Estimate SOC of Multiple Battery Cells Simultaneously |
| title_full_unstemmed | Study on a High-Accuracy Real-Time Algorithm to Estimate SOC of Multiple Battery Cells Simultaneously |
| title_short | Study on a High-Accuracy Real-Time Algorithm to Estimate SOC of Multiple Battery Cells Simultaneously |
| title_sort | study on a high accuracy real time algorithm to estimate soc of multiple battery cells simultaneously |
| url | http://dx.doi.org/10.1155/2017/5390149 |
| work_keys_str_mv | AT yongluo studyonahighaccuracyrealtimealgorithmtoestimatesocofmultiplebatterycellssimultaneously AT yingzhekan studyonahighaccuracyrealtimealgorithmtoestimatesocofmultiplebatterycellssimultaneously AT yanliyin studyonahighaccuracyrealtimealgorithmtoestimatesocofmultiplebatterycellssimultaneously AT liliu studyonahighaccuracyrealtimealgorithmtoestimatesocofmultiplebatterycellssimultaneously AT huanyucui studyonahighaccuracyrealtimealgorithmtoestimatesocofmultiplebatterycellssimultaneously AT feiwu studyonahighaccuracyrealtimealgorithmtoestimatesocofmultiplebatterycellssimultaneously |