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Jeyoung Park

Jeyoung Park

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Implementing Coulomb Counting for SOC Evaluation

Tasks

Assigned to

Current and Voltage Measurements

  • Current and voltage measurements need to be performed precisely.

Possible Solution:

  • Connect analog-to-digital converter like ADS1115 module to the battery. 

  • The module measures the voltage across a sense resistor connected in series to the positive voltage of the battery, and the current is calculated using Ohm’s law.

What to do:

  • Connect current/voltage measurement device to microcontroller and battery.

  • Write software for MCU that takes in values from sensor(s) and calculate current.

Charging Module

  • A charging module that charges battery with constant current and voltage.

  • When the battery is at its full capacity, the charging process should be terminated.

    • The battery is determined to have reached its full capacity when the battery voltage is 4.2 V and the charging current falls below the threshold.

What to do: