How To Discharge Lead Acid Battery. Depending on the state of charge SoC the cell may temporarily be lower after discharge than the applied voltage. Lead acid batteries should be discharged only by 50 to increase its life is an oft used phrase.
Car batteries usually have a capacity of around 45 to 60 AHr if you assume the battery is fully charged and in good condition then it should take around 10 hours to discharge it. This means that we should cycle them in the 100 to 50 window as shown below in the Typical state of charge window parameter. When a single lead-acid galvanic cell is discharging it produces about 2 volts.
To charge a sealed lead acid battery a DC voltage between 230 volts per cell float and 245 volts per cell fast is applied to the terminals of the battery.
In order to analyze the damage of the battery after long-term use or to estimate the batterys continuous discharge time its capacity needs to be tested. The battery in a petrol or diesel car is a 12 volt lead-acid battery. Lead Acid batteries regardless of construction chemistry all exhibit a self-discharge characteristic that varies by storage temperature state of health and state of charge of the subject battery. Discharging of Lead Acid Battery When the sulphuric acid is dissolved its molecules are dissociated into hydrogen ions 2H and sulfate ions SO4 which moves freely in the electrolyte.
