Various capacity parameters of lead-acid batteries are: energy density is 60-75 Wh/l, specific energy is 30-40 Wh/Kg, charge/discharge efficiency is 50-92%, specific power is 180 W/kg, self discharge rate is 3-20%/month, cycle durability is 500-800 cycles and nominal cell voltage is 2.105 V . ... [...] ...
... lead-acid battery, a voltage is produced when reaction occurs between the lead electrodes and sulfuric acid and water electrolytes . The schematic view of lead-acid battery is depicted in Figure 2.
This project is about discharging lead acid battery at a constant current to measure its actual capacity. Due to hardware and design constrain there are few limitations : Only 12 Volts Lead Acid Batteries up to 200Ah can be Discharge !
Because of measurement offset (to achieve better Voltage Measurement Resolution) only Voltages from 10.1 V to 14.7 V can be measured, which means any voltage below 10.1 volt will read 10.1 volt. Besides, a 12 Volt Lead Acid Battery that reads 10 volt is practically Dead ! Voltage Measurement Resolution is 5 mV.
Due to hardware and design constrain there are few limitations : Only 12 Volts Lead Acid Batteries up to 200Ah can be Discharge ! Because of measurement offset (to achieve better Voltage Measurement Resolution) only Voltages from 10.1 V to 14.7 V can be measured, which means any voltage below 10.1 volt will read 10.1 volt.
You are here: Home / Battery Chargers / Precise Battery Capacity Tester Circuit – Backup Time Tester The precise battery capacity tester circuit explained in the following article can be used for testing the maximum backup capacity of any rechargeable battery in real time.