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The current methods for predicting the state of health of lithium batteries often suffer from low accuracy. This paper introduces a method for state of health prediction using a seagull optimization algorithm optimized deep extreme learning machine. Key health feature parameters, such as constant voltage charging and discharging times during battery cycles, are selected and their correlation with the battery state of health is analyzed using Pearson correlation. The proposed model predicts subsequent state of health values by learning from samples. Experiments conducted with battery data compare the proposed method with single extreme learning machine, single deep extreme learning machine, and other literature. Evaluation metrics, including maximum absolute error and root mean square error, demonstrate that the seagull optimization algorithm optimized deep extreme learning machine model achieves higher accuracy and faster prediction times, with errors below 1.1%, indicating superior prediction accuracy and applicability.
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针对锂电池健康状态预测准确度较低的问题,本文提出一种基于海鸥优化算法优化深度极限学习机的健康状态预测方法。首先,选取电池充放电循环的等压升充电时间和等压降放电时间作为预测健康状态的特征参数,并采用Pearson相关系数定量分析其与电池健康状态的相关性。然后,建立海鸥优化算法-深度极限学习机模型,通过学习健康状态和特征参数的样本,预测后续循环的健康状态值。最后,利用公开的电池数据进行预测,并分析预测结果,与极限学习机、深度极限学习机和其他研究的预测结果进行对比,引入最大绝对误差和方均根误差作为量化评价指标。结果表明,海鸥优化算法-深度极限学习机模型相较其他常见模型具有更高的训练测试精度、更短的预测时间,能够实现锂电池健康状态的准确预测,最大绝对误差和方均根误差均低于0.01,预测准确度高、适用性强。
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靳 灿(1992—),女,山东省济宁市人,本科,工程师,主要从事电力企业项目管理工作。
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健康特征 参数 | Pearson相关系数(绝对值) |
| B0005 | B0006 | B0007 | B0018 |
| T1 | 0.993 2 | 0.987 2 | 0.984 4 | 0.975 4 |
| T2 | 0.998 5 | 0.995 6 | 0.998 6 | 0.996 0 |
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健康特征 参数 | Pearson相关系数(绝对值) |
| B0005 | B0006 | B0007 | B0018 |
| T1 | 0.993 2 | 0.987 2 | 0.984 4 | 0.975 4 |
| T2 | 0.998 5 | 0.995 6 | 0.998 6 | 0.996 0 |
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| 电池 | MAE | RMSE |
| ELM | DELM | SOA-DELM | ELM | DELM | SOA-DELM |
| B0005 | 0.007 593 00 | 0.003 789 06 | 0.001 709 06 | 0.008 867 46 | 0.004 274 34 | 0.002 124 84 |
| B0006 | 0.007 779 61 | 0.006 004 04 | 0.004 757 90 | 0.012 141 28 | 0.008 012 73 | 0.006 380 81 |
| B0007 | 0.007 668 89 | 0.003 446 73 | 0.001 550 55 | 0.008 793 29 | 0.003 850 87 | 0.002 055 20 |
| B0018 | 0.008 828 01 | 0.004 856 35 | 0.002 885 62 | 0.010 820 18 | 0.005 028 74 | 0.003 243 40 |
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不同模型的评价指标
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| 电池 | MAE | RMSE |
| ELM | DELM | SOA-DELM | ELM | DELM | SOA-DELM |
| B0005 | 0.007 593 00 | 0.003 789 06 | 0.001 709 06 | 0.008 867 46 | 0.004 274 34 | 0.002 124 84 |
| B0006 | 0.007 779 61 | 0.006 004 04 | 0.004 757 90 | 0.012 141 28 | 0.008 012 73 | 0.006 380 81 |
| B0007 | 0.007 668 89 | 0.003 446 73 | 0.001 550 55 | 0.008 793 29 | 0.003 850 87 | 0.002 055 20 |
| B0018 | 0.008 828 01 | 0.004 856 35 | 0.002 885 62 | 0.010 820 18 | 0.005 028 74 | 0.003 243 40 |
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