Isothermal charging/discharging experiment

  • Type of sample: Coin Cell LiR2032
  • Isothermal mode with temperature
    set at 40°C
  • Charging/Discharging cycle
    Constant current Constant voltage
    (CC-CV) – 40 mA from 4.2 V to 3.0 V

The data shows that charging is characterized by a short endotherm followed by a small exothermic reaction while discharging is characterized by a long exothermic reaction. Cycles are reliably repeatable.

Isothermal charging/discharging of LiR2032 coin cellIsothermal charging/discharging of LiR2032 coin cell

The same data was used to calculate the cell efficiency during charging and discharging. Also note that the isothermal temperature varies only slightly through the discharge and charge cycle.

Battery Power, Heat Flow and Temperature as a Function of TimeBattery Power, Heat Flow and Temperature as a Function of Time