What is the maximum discharge current of lead-acid batteries
The specified battery discharge conditions are:
The discharge current of the battery is generally the discharge rate
The termination voltage and discharge current of discharge are different, and the termination discharge voltage is also different
⑶ Discharge temperature: At low temperatures, the discharge capacity of the battery is small, while at high temperatures, the discharge capacity is large. In order to unify the discharge capacity, the discharge temperature is specified.
The discharge rate refers to the magnitude of the discharge current of a battery, which is divided into time rate and current rate.
Discharge time rate refers to the length of time from discharge to termination voltage under certain discharge conditions. According to IEC standards, the discharge rates are 20 hour rate (20Hr, the most common type, which is usually labeled on the battery), 10 hour rate (10Hr), 5 hour rate (5Hr), 3 hour rate (3Hr), 2 hour rate (2Hr), 1 hour rate (1Hr), 0.5 hour rate (0.5Hr), and so on.
The discharge current of a battery varies, and the capacity it can release also varies. The larger the discharge current, the smaller the amount of electricity it can release.
In addition, the larger the discharge current, the shorter the battery life; The deeper the discharge depth, the shorter the battery life.
Lead–acid battery can cope with a short period of high current discharge, when the discharge depth is not deep. Low current discharge, even if the discharge depth is slightly deeper, has little impact on the battery life. Most afraid of continuous high current discharge and deep discharge.
Maximum charging current 3A
As the battery discharges, both the positive and negative plates are sulfurized, and the sulfuric acid in the electrolyte gradually decreases while the water content increases, resulting in a decrease in the specific gravity of the electrolyte. In practical use, the degree of discharge of the battery can be determined by measuring the specific gravity of the electrolyte. Under normal use, lead batteries should not be discharged excessively, or small Lead(II) sulfate crystals mixed with active substances will form larger bodies, which not only increases the resistance of the electrode plate, but also makes it difficult to restore it during charging, directly affecting the capacity and life of the storage tank. Charging a lead-acid battery is the reverse process of discharge.
The principle equation of Lead–acid battery charging and discharging chemical reaction is as follows:
Positive electrode: PbO2+2e -+SO42-+4H+==PbSO4+2H2O
Negative electrode: Pb-2e+SO42-==PbSO4
Cathode: PbSO4+2e -=Pb+SO42-;
Anode: PbSO4+2H2O-2e -=PbO2+4H++SO42-.
Total reaction: PbO2+2H2SO4+Pb=2PbSO4+2H2O (forward discharge, reverse charge)
(The mass of both the positive and negative electrodes of a lead-acid battery increases during discharge, due to the presence of PbSO4 on the positive electrode plate during discharge, resulting in an increase in mass.)
Lead acid electricity is generally divided into three categories; 1. Starting battery, 2. Power battery, and 3. UPS battery. Among them, the maximum discharge current of the starting battery in a short period of time can discharge more than 5 times its total capacity. The CCA labeled on the battery means that. If your 10 ampere hour battery belongs to a motorcycle battery, it can discharge a current of over 50 amperes. If it is the last two types of batteries, the discharge current should be smaller. The charging current is one tenth of the capacity, which is 1 ampere.