What are the hazards of overcharging to the battery?

As far as we riders of electric bicycles are concerned, charging electric bicycles is basically one of our daily lives. Everyone knows that a dedicated charger must be used when charging. When charging, first insert the output plug of the charger into the charging socket of the battery, and then insert the power plug on the charger into the socket of the AC power source. At this time, the power indicator on the charger panel should be red, indicating that it is charging. The charging time should be controlled between 8 and 10 hours, and lead-acid batteries should not be charged for a long time. After charging, you should unplug the AC power plug first, and then unplug the charger output plug from the battery. When the battery capacity is 50~%70%, the charging effect is the best, and it should be fully charged once. However, we should pay attention to preventing deep discharge when using it, and shallow charging and shallow discharge must be done, provided that there is a suitable charger to match it, which is the best original charger. The depth of battery charging has a great impact on the cycle life, and basically it changes exponentially. The deeper the discharge, the greater the expansion and contraction, the greater the damage to the active material binding force of the battery, and the longer the life. Big. In fact, the most ideal charging should be determined according to the actual use of the battery. The frequency of charging should be determined by referring to the usual operating frequency, mileage, and some manuals provided by the battery factory, as well as the performance of the supporting charger. . According to the manufacturer’s manufacturing process, the basic requirement for charging of lead-acid batteries is that the charging current should be less than or equal to the maximum charging current that the battery can accept, otherwise, the excess current will cause the electrolyte to be excessively consumed, resulting in harm. What kind of hazards? For example, the water loss rate of the battery has been increased, and the difficulty of maintenance has been added. Regarding the maintenance-free battery, the battery will fail prematurely, and acid fog will also appear, causing environmental pollution, reducing the charging efficiency, and causing energy. Of serious waste. Are there any requirements for charging lead-acid batteries? You can see clearly that many of us know that the charging process is a reverse reaction process of the discharge chemical reaction. If the charging electrochemical reaction is carried out in an ideal state, the amount of electricity that should be charged and the amount of electricity released Electricity is basically equal. However, if the battery is seriously outgassing, the gas will accumulate inside the porous electrode of the battery, reducing the contact area between the electrolyte and the porous electrode, that is to say, the interface of the charging electrochemical reaction has been greatly reduced, making The speed of the charging chemical reaction is reduced, charging seems to be very difficult, and the charging time is forced to be extended. The electricity consumed in the effective charging chemical reaction process does not reach 40% of the total electricity, which means that more than 60% of the electricity is wasted. The emergence of a large amount of gas has the purpose of scouring the active material of the electrode plate, making the active material easy to loosen, and also easy to fall off. Under higher polarization voltage, the grid of the positive electrode plate will be severely corroded, and To generate lead peroxide. Under this kind of corrosion application, it is completely different from the hydrogen peroxide produced by the electrochemical reaction. It is an irreversible oxide and its conductivity is very poor. Moreover, the grid is deformed and brittle, and the purpose of the bracket and the conductive performance are lost. Especially when the charge is insufficient for a long time, irreversible crystals and irreversible sulfates will appear in the unreacted active material, which causes the capacity of the battery to decrease and the internal resistance to increase. Cause premature failure of the battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What are the differences between power lithium-ion batteries and storage batteries?