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arXiv 2406.06151eess.SYcs.SY
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基于机器学习的高计算效率在线电池健康状态估计

Computationally Efficient Machine-Learning-Based Online Battery State of Health Estimation

Abhijit Kulkarni, Remus Teodorescu

AI总结:

针对商用BMS低成本微控制器难以运行复杂AI/ML模型的问题,本文提出一种基于四频率在线阻抗特征和线性回归的计算高效、数据轻量的SoH估计方法,并在两个实验数据集上验证了MAE低于2%的准确性。

摘要:

在电动出行应用中,电池管理系统(BMS)的一个关键功能是高精度地估计电池健康状态(SoH)。在商用BMS中,这通常通过基于模型的方法实现。已有大量研究致力于开发数据驱动方法以提高SoH估计的准确性。这些数据驱动方法多种多样,并使用不同的机器学习(ML)或人工智能(AI)技术。复杂的AI/ML技术由于大量使用非线性函数和大规模矩阵运算,难以在BMS所用的低成本微控制器中实现。本文提出了一种计算高效且数据轻量的SoH估计技术。通过评估四个离散频率下的在线阻抗来推导线性回归问题的特征。所提出的解决方案避免了复杂的数学运算,非常适合在商用BMS中在线实现。该方法的准确性在两个实验数据集上得到验证,结果表明在多样化的训练和测试数据上平均绝对误差(MAE)小于2%。

英文摘要:

A key function of battery management systems (BMS) in e-mobility applications is estimating the battery state of health (SoH) with high accuracy. This is typically achieved in commercial BMS using model-based methods. There has been considerable research in developing data-driven methods for improving the accuracy of SoH estimation. The data-driven methods are diverse and use different machine-learning (ML) or artificial intelligence (AI) based techniques. Complex AI/ML techniques are difficult to implement in low-cost microcontrollers used in BMS due to the extensive use of non-linear functions and large matrix operations. This paper proposes a computationally efficient and data-lightweight SoH estimation technique. Online impedance at four discrete frequencies is evaluated to derive the features of a linear regression problem. The proposed solution avoids complex mathematical operations and it is well-suited for online implementation in a commercial BMS. The accuracy of this method is validated on two experimental datasets and is shown to have a mean absolute error (MAE) of less than 2% across diverse training and testing data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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