Battery SOH estimation based on decision tree and improved support vector machine regression algorithm
Battery state of health (SOH) estimation is crucial for the estimation of the remaining driving range of electric vehicles and is one of the core functions of the battery management system (BMS). The lithium battery feature sample data used in this paper is extracted from the National Aeronautics an...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-06-01
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| Series: | Frontiers in Energy Research |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1218580/full |
| _version_ | 1827919953918951424 |
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| author | Lijun Qian Liang Xuan Jian Chen |
| author_facet | Lijun Qian Liang Xuan Jian Chen |
| author_sort | Lijun Qian |
| collection | DOAJ |
| description | Battery state of health (SOH) estimation is crucial for the estimation of the remaining driving range of electric vehicles and is one of the core functions of the battery management system (BMS). The lithium battery feature sample data used in this paper is extracted from the National Aeronautics and Space Administration (NASA) of the United States. Based on the obtained feature samples, a decision tree algorithm is used to analyze them and obtain the importance of each feature. Five groups of different feature inputs are constructed based on the cumulative feature importance, and the original support vector machine regression (SVR) algorithm is applied to perform SOH estimation simulation experiments on each group. The experimental results show that four battery features (voltage at SOC = 100%, voltage, discharge time, and SOC) can be used as input to achieve high estimation accuracy. To improve the training efficiency of the original SVR algorithm, an improved SVR algorithm is proposed, which optimizes the differentiability and solution method of the original SVR objective function. Since the loss function of the original SVR is non-differentiable, a smoothing function is introduced to approximate the loss function of the original SVR, and the original quadratic programming problem is transformed into a convex unconstrained minimization problem. The conjugate gradient algorithm is used to solve the smooth approximation objective function in a sequential minimal optimization manner. The improved SVR algorithm is applied to the simulation experiment with four battery feature inputs. The results show that the improved SVR algorithm significantly reduces the training time compared to the original SVR, with a slight trade-off in simulation accuracy. |
| first_indexed | 2024-03-13T04:04:49Z |
| format | Article |
| id | doaj.art-fca7c2c99b96452281af2aacbf3cdc52 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-03-13T04:04:49Z |
| publishDate | 2023-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-fca7c2c99b96452281af2aacbf3cdc522023-06-21T09:24:48ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2023-06-011110.3389/fenrg.2023.12185801218580Battery SOH estimation based on decision tree and improved support vector machine regression algorithmLijun QianLiang XuanJian ChenBattery state of health (SOH) estimation is crucial for the estimation of the remaining driving range of electric vehicles and is one of the core functions of the battery management system (BMS). The lithium battery feature sample data used in this paper is extracted from the National Aeronautics and Space Administration (NASA) of the United States. Based on the obtained feature samples, a decision tree algorithm is used to analyze them and obtain the importance of each feature. Five groups of different feature inputs are constructed based on the cumulative feature importance, and the original support vector machine regression (SVR) algorithm is applied to perform SOH estimation simulation experiments on each group. The experimental results show that four battery features (voltage at SOC = 100%, voltage, discharge time, and SOC) can be used as input to achieve high estimation accuracy. To improve the training efficiency of the original SVR algorithm, an improved SVR algorithm is proposed, which optimizes the differentiability and solution method of the original SVR objective function. Since the loss function of the original SVR is non-differentiable, a smoothing function is introduced to approximate the loss function of the original SVR, and the original quadratic programming problem is transformed into a convex unconstrained minimization problem. The conjugate gradient algorithm is used to solve the smooth approximation objective function in a sequential minimal optimization manner. The improved SVR algorithm is applied to the simulation experiment with four battery feature inputs. The results show that the improved SVR algorithm significantly reduces the training time compared to the original SVR, with a slight trade-off in simulation accuracy.https://www.frontiersin.org/articles/10.3389/fenrg.2023.1218580/fulllithium batterySOHSVRBMSdecision tree |
| spellingShingle | Lijun Qian Liang Xuan Jian Chen Battery SOH estimation based on decision tree and improved support vector machine regression algorithm Frontiers in Energy Research lithium battery SOH SVR BMS decision tree |
| title | Battery SOH estimation based on decision tree and improved support vector machine regression algorithm |
| title_full | Battery SOH estimation based on decision tree and improved support vector machine regression algorithm |
| title_fullStr | Battery SOH estimation based on decision tree and improved support vector machine regression algorithm |
| title_full_unstemmed | Battery SOH estimation based on decision tree and improved support vector machine regression algorithm |
| title_short | Battery SOH estimation based on decision tree and improved support vector machine regression algorithm |
| title_sort | battery soh estimation based on decision tree and improved support vector machine regression algorithm |
| topic | lithium battery SOH SVR BMS decision tree |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1218580/full |
| work_keys_str_mv | AT lijunqian batterysohestimationbasedondecisiontreeandimprovedsupportvectormachineregressionalgorithm AT liangxuan batterysohestimationbasedondecisiontreeandimprovedsupportvectormachineregressionalgorithm AT jianchen batterysohestimationbasedondecisiontreeandimprovedsupportvectormachineregressionalgorithm |