Projekt Energie


Electrochemical Storage: Lead- acid -Accumulator

Basic reactions during charging,

Lead acid batteries

  • The oldest type of rechargeable battery  (1859)
  • Low energy-to-weight, energy-to-volume ratios but ability to supply high surge currents (short burst of high power)
  • Low cost


Positive and negative internal plates made of lead
Plate separators made of porous synthetic material
Electrolyte, a dilute solution of sulfuric acid and water (battery acid)

Basic reactions during charging and discharging

  • Typical electrolysis: diluted sulfuric acid (water:acid ratio 3:1)
  • Positive plate PbO2 (Lead dioxide)
  • Negative plate Pb

More information can be found on the learning platform.