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Equivalent Circuit Cell Model Simulation

University of Colorado System via Coursera

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Overview

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In this course, you will learn the purpose of each component in an equivalent-circuit model of a lithium-ion battery cell, how to determine their parameter values from lab-test data, and how to use them to simulate cell behaviors under different load profiles. By the end of the course, you will be able to:
- State the purpose for each component in an equivalent-circuit model
- Compute approximate parameter values for a circuit model using data from a simple lab test
- Determine coulombic efficiency of a cell from lab-test data
- Use provided Octave/MATLAB script to compute open-circuit-voltage relationship for a cell from lab-test data
- Use provided Octave/MATLAB script to compute optimized values for dynamic parameters in model
- Simulate an electric vehicle to yield estimates of range and to specify drivetrain components
- Simulate battery packs to understand and predict behaviors when there is cell-to-cell variation in parameter values

Syllabus

WEEK 1

Defining an equivalent-circuit model of a Li-ion cell

In this module, you will learn how to derive the equations of an equivalent-circuit model of a lithium-ion battery cell.

 

WEEK 2

Identifying parameters of static model

In this module, you will learn how to determine the parameter values of the static part of an equivalent-circuit model.

 

WEEK 3

Identifying parameters of dynamic model

In this module, you will learn how to determine the parameter values of the dynamic part of an equivalent-circuit model.

 

WEEK 4

Simulating battery packs in different configurations

In this module, you will learn how to generalize the capability of simulating the voltage response of a single battery cell to a profile of input current versus time to being able to simulate constant-voltage and constant-power control of a battery cell, as well as different configurations of cells built into battery packs.

 

WEEK 5

Co-simulating battery and electric-vehicle load

In this honors module, you will learn how to co-simulate a battery pack and an electric-vehicle load. This ability aids in sizing vehicle components and the battery-pack.

 

WEEK 6

Capstone project

In this final module for the course, you will modify three sample Octave programs to create functions that can simulate temperature-dependent cells, battery packs built from PCMs, and battery packs built from SCMs.

Taught by

Gregory Plett

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