The battery uses a lead plate filled with spongy lead as a negative electrode, a lead plate filled with lead dioxide as a positive electrode, and 22 ~ 28% dilute sulfuric acid as an electrolyte.
When charging, electrical energy is converted into chemical energy, and when discharging, chemical energy is converted into electrical energy. When the battery is discharged, the metal lead is the negative electrode, which occurs oxidation reaction and is oxidized to lead sulfate. Lead dioxide is the positive electrode, which undergoes a reduction reaction and is reduced to lead sulfate.
When the battery is charged with direct current, lead and lead dioxide are formed at the poles, respectively. After removing the power supply, it returns to the state before discharge and forms a chemical battery.
Lead batteries are batteries that can be recharged and discharged repeatedly, which are called secondary batteries. Its voltage is 2V, usually three lead batteries are used in series, the voltage is 6V. Its charge and discharge voltage range is also 6 volts for the best.
For the battery measurement, there are mainly two parameters, one is the voltage, after the battery of 6 volts is charged, the measured voltage should be about 8 volts, why is it so high? The main thing is the existence of floating electricity. Be sure to accept the load and the voltage will soon return to normal of 6 volts.
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The other is the current of the battery, which can be detected using a special current measuring instrument, the main purpose is to see the actual capacity of the battery.
The charging voltage of the 6V battery is about 7~ 8V; The charging current should be controlled below 1A. 6V battery, is composed of 3 2V, according to each individual charge limit of 2.35-2.4V to calculate, the voltage can be 7.05-7.2V, it should be pointed out that this is only an estimate, because the open circuit voltage of the battery is related to the density of the electrolyte; Different manufacturers use different densities, and the charging voltage will be a little bit...
When the single cell voltage of the lead-acid battery is sufficient, it is 2.65V. If the discharge is lower than 1.7V, it is necessary to supplement the electricity. The 6V battery is three single cell batteries in series. You can calculate the charge and discharge voltage range.