3. Battery pack

3.3. Serial connection

  • When connecting cells in series, the voltages of the individual cells are added up.
  • The current of series-connected cells is equal to the current of one cell.
  • The power of a serial connection is the sum of the power of individual cells.
  • The capacity (Wh) of a serial connection is the sum of the capacities of the cells.

  • Single cell  (e.g. 3,7 V, 2600 mAh)





Note
If we wanted to create a voltage of 400 V (suitable for driving an electric car), we would have to connect 108 cells in series.

Total power: P = 108 * 3.7 * 2.6 = 1040 W
=> the power is insufficient, it is also necessary to add cells in parallel