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电池参数估计

表征电芯性能，分析阻抗和电动态特性，并执行模型参数估计

Simscape™ Battery™ 包含多种对象和函数，用于对不同电化学系统的等效电路模型 (ECM) 执行参数估计。通过这些对象和函数，可以处理电池或燃料电池测试数据并定义其数据表，表征电化学电池的性能或绘制其阻抗图，验证参数并使其可视化，以及自动对 Simscape Battery 电芯模块进行参数化。混合脉冲功率特性 (HPPC) 和电化学阻抗谱 (EIS) 测试数据是参数估计过程中最典型的数据源。在 HPPC 测试中，您可以测量电池电压随时间的变化。在 EIS 测试中，您可以获得电化学系统在各种频率下的阻抗。

您可以导入、查看、处理和存储根据 HPPC 和 EIS 实验技术获得的数据。然后，您可以从电压或阻抗数据中提取 ECM 所需的参数。使用 HPPC 数据估计电池线性 ECM 在不同温度、荷电状态和电流下的参数。然后，您可以使用估计的参数对 Battery Equivalent Circuit 模块进行参数化。使用 EIS 数据可估计电池、燃料电池和其他电化学组件的分数阶等效电路模型 (FOECM) 的参数。在估计 FOECM 的参数后，您可以使用这些参数在 MATLAB® 中仿真系统的频率响应，或分析电芯中发生的内部过程。您还可以获取不同工况（包括温度和荷电状态等）下的 FOECM 参数并定义其数据表。

函数

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hppcTestCreate test container object for hybrid pulse power characterization test data (自 R2025a 起)
hppcTestSuiteStore HPPCTest objects (自 R2025a 起)
eisTestCreate test container object for electrochemical impedance spectroscopy test data (自 R2025a 起)
ecmCreate equivalent circuit model object for estimating battery parameter from impedance data (自 R2025a 起)
eisModelCreate fractional-order equivalent circuit model object for analyzing battery impedance data (自 R2025a 起)
fitECMPerform impedance parameter estimation for battery ECM from time-based HPPC data (自 R2025a 起)
fitEISModelPerform impedance parameter estimation for battery fractional-order model from frequency-based EIS data (自 R2025a 起)
estimateBatteryEISParametersEstimate initial parameters for electrochemical-impedance-spectroscopy fractional-order model (自 R2025a 起)
eisParameterEstimatorOpen interface to manually tune parameters of fractional-order equivalent circuit model (自 R2025a 起)

对象

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FitEquivalentCircuitModelEquivalent circuit model for fitting parameters from time-based pulse power characterization data (自 R2025a 起)
FitFractionalOrderModelFractional order model for fitting parameters from frequency-based electrochemical impedance spectroscopy data (自 R2025a 起)
HPPCChartChart for visualizing identified discharge and charge pulses in a voltage plot (自 R2025a 起)
ImpedanceVerificationChartNyquist chart for visualizing measured and simulated impedance data (自 R2025a 起)
VoltageVerificationChartChart for visualizing and comparing measured and simulated voltage data over time (自 R2025a 起)

主题

精选示例

Estimate Battery Model Parameters from HPPC Data

Estimate Battery Model Parameters from HPPC Data

Estimate the model parameters for a battery equivalent circuit model (ECM) from hybrid pulse power characterization (HPPC) data using Simscape™ Battery™. HPPC is a valuable technique in the battery industry and is one of the most common battery tests performed both at single-cell level or at system level. This technique involves applying a series of constant current pulses to a battery and measuring its terminal voltage and temperature responses at different operating conditions. There are multiple key operating conditions, including the initial battery soak temperature, initial state of charge (SOC), current or load, current directionality such as charge or discharge, state of health (SOH) or remaining capacity, and load frequency. The measured voltage response from each current pulse contains valuable information regarding the internal resistance or impedance of the battery.

Estimate Battery Model Parameters from EIS Data

Estimate Battery Model Parameters from EIS Data

Estimate the model parameters for a battery equivalent circuit model (ECM) from electrochemical impedance spectroscopy (EIS) data using Simscape™ Battery™. The fractional-order equivalent circuit model (FOECM) is the ECM used for the analysis and interpretation of EIS data. EIS is a valuable technique that you can use to probe or investigate the impedance dynamics of electrochemical systems, such as batteries and fuel cells. Traditionally, during an EIS test, you apply a small, alternating current (AC) signal to an electrochemical cell and measure the resulting voltage response. This voltage response allows for the characterization of complex impedance over a range of frequencies at different operating conditions, including the initial battery soak temperature, initial state of charge (SOC), current or load, current directionality, state of health (SOH) or remaining capacity, and load frequency.

表征电动汽车的电池电芯

表征电动汽车的电池电芯

此示例说明了如何使用 [1] 中的测试方法对电动汽车应用的电池电芯进行特性分析。此例估计了在五种不同环境温度下，BAK N18650CL-29 18650 型锂离子电芯 [2] 的参数。电池混合脉冲功率特性 (HPPC) 测试在受控的环境箱中进行。