EMIOT project

Project for the Energy Management for IoT Course @ Politecnico di Torino (A.Y. 2022-23)

Description

Modeling of battery behavior during charging and discharging cycles. The model is developed using MATLAB/Simulink, then translated to simple C/C++ code to be simulated on PC, lastly it is ported to an MCU. The project is based on multiple papers

Documentation

See here and here

Current State

Part 1

• Realistic input data
• SoC to Voc block
• Circuit parameters
• Circuit model (Simscape)
• k1, k2, k3 parameters modeling with temperature
• Potential variation due to temperature
• Dynamic cycle counting

Part 2

• Model translation to C/C++
  • Parametric simulation clock
  • Simulink blocks
  • Circuit model (Zeq)
• Simulation in C
  • Input data generation from file
  • Saving siulation results to file (.csv)
  • Printing results on console

Example: Example of the console output of a simulation run

**********
TIME:           0.000 s
Current:        0.000000 A
V Batt:         3.959059 V
CCF:            98.73 %
SoC:            75.00 %
**********
TIME:           600.000 s
Current:        1.000000 A
V Batt:         3.707443 V
CCF:            98.73 %
SoC:            58.03 %
**********
TIME:           1800.000 s
Current:        1.000000 A
V Batt:         3.608337 V
CCF:            98.72 %
SoC:            25.42 %

Part 3

• Porting to MCU

Results

Comparison between the simulation of the Matlab/Simulink model and the C code model:

Simulation results of Matlab/Simulink model.

Simulation results of C code model.

Some relevant results can be seen in results.md

Issues

• Inconsistent variable types between model and functions
• Model files of type .cpp instead of .c (compilation issues)
• General naming convention for variables and functions
  • Proposed snake_case for variable and CamelCase for functions
• General buggyness