When the lead-acid battery is discharged, the dilute sulfuric acid will be reacted with the active material on the yin and anode plate, and the new compound "lead" is produced. It is released from the electrolyte via the discharge sulfuric acid ingredient, and the concentration of the sulfuric acid is slurly. The ingredients consumed are proportional to the amount of discharge, and as long as the concentration of the sulfuric acid in the electrolyte is measured, it is also known that the amount of discharge or residual power is known, and several discharge conditions need to be known:
1, lead-acid battery discharge current. In general, the discharge rate is the time rate and current rate of the battery discharge current. The discharge time rate refers to the time between the discharge voltage and the termination voltage under certain discharge conditions. According to the IEC standard, the discharge rate is 20 hours, 10 hours, 5 hours, 3 hours, 2 hours, 1 hour, 0.5 hours, etc. The battery rated capacity is represented by C, and the battery capacity of different discharge rates is different.
2, discharge termination voltage. Under different discharge currents, end voltages are different. As the discharge progresses, the lead-acid battery end voltage is gradually lowered. The lowest voltage for charging at 25 ¡ã C is referred to as discharge termination voltage. The discharge termination voltage is different from the discharge rate. When the 10-hour rate is discharged, most terminal voltages is 1.8V / single grid, and the end voltage at 2 hours rate is 1.75V / a grating. At this voltage, although a slightly more power can be released, it is easy to form a decrease in charging capacity, so it is not necessary to discharge to the terminal voltage unless otherwise.
3, discharge temperature. The low temperature discharge capacity of the lead-acid battery is small, and the high temperature discharge capacity is large
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