Equivalent circuit modelling of a cell in simulink and plotting the discharge characteristics

I am trying to model the equivalent circuit of a battery cell in simulink. I modelled one RC and Two RC circuit and tried to validate the discharge plot of the cell from a literature. Everything was done as per the literature but there is a difference observing at the end of simulation in the discharge plot as shown below. Can anyone suggest any opinion in improving the result or any particular thing i need to consider mainly.

This is the plot from literature

This is the plot from simulation

Literature: Comparative Research on RC Equivalent Circuit Models for Lithium-Ion Batteries of Electric Vehicles Lijun Zhang 1,* ID , Hui Peng 1 , Zhansheng Ning 1 , Zhongqiang Mu 1 and Changyan Sun

[Thanh]

Hi Ranjith,

Do you have the experimental data of the article above. I have a class project and I found this paper is useful, however my topic is using Kalman filter, so I need both simulation and experimental data.

Thank you so much!

Answer 1

[Pratyush Roy]

Hi Ranjith,

Can you share the Simulink model(s) so that we can reproduce the issue from our end?

[RANJITH PRAKASH]

Okay

[RANJITH PRAKASH]

Please see the somulink model and code. The literature i am following is mentioned above in the question which will help if you are trying to model.I am using 2021a version

[Pratyush Roy]

Hi Ranjith,

One of the factors which should be taken into consideration while obtaining the output is the Type of Solver used.The documentation link here might be helpful to understand types of solver to use under different circumstances.

Hope this helps!