计及电热耦合效应的锂离子电池建模方法

doi:doi:10.19912/j.0254-0096.tynxb.2024-0854

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计及电热耦合效应的锂离子电池建模方法

更新时间：2025-10-22

- 计及电热耦合效应的锂离子电池建模方法
- Vol. 46, Issue 9, Pages: 323-332(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：doi:10.19912/j.0254-0096.tynxb.2024-0854
  CLC： TM911
- Published Online：14 October 2025，
  
  Published：2025
- 稿件说明：
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[J]. 2025, 46(9): 323-332.
DOI：

[J]. 2025, 46(9): 323-332. DOI： doi:10.19912/j.0254-0096.tynxb.2024-0854.

摘要

针对锂离子电池内阻与容量增量难以建立解析模型的问题

提出一种基于机理的

以锂离子电池的电流和温度等变量为输入、以内阻和容量增量为输出的建模方法。首先

该方法基于Arrhenius公式

构建可定量描述在电流、温度等变量影响下的电压机理模型以及在电流、电压等变量影响下的Bernardi热机理模型。其次

通过所设计的有效实验解耦上述两个模型间以及变量间的耦合效应。然后

进一步推导出内阻解析模型和容量增量解析模型。实验结果表明

所提方法实验量不大且能够准确估计电池的电压、内阻以及容量增量

电压误差低于0.3‰

内阻误差低于1.2%。

Abstract

To address the difficulty of analytical modeling of the internal resistance and incremental capacity of lithium-ion batteries

this paper proposes a mechanism-based modeling method with battery current and temperature as inputs variables and the internal resistance and incremental capacity as outputs. Firstly

the method constructs a voltage mechanism model based on the Arrhenius equation

which can quantitatively describe the voltage under the influence of current

temperature and other variables

as well as a Bernardi thermal mechanism model under the influence of current

voltage and other variables. Secondly

the coupling effects between the above two models and between the variables are decoupled through well-designed experiments. Then

the analytical model for internal resistance and incremental capacity analytical model are further derived. The experimental results show that the proposed method requires minimal experimentalal effect and can accurately estimate the battery voltage

internal resistance and incremental capacity. The voltage error is lower than 0.3‰ and the internal resistance error is lower than 1.2%.

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references

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