Analysis of several characteristics of lead-acid batteries

(1) As the battery capacity increases, the volume and quality also increase. The significance of knowing it is to fully know the allowed area and load-bearing capacity of the user's computer room when choosing the battery capacity. (2) As the battery capacity increases, its internal resistance also decreases. Knowing its significance is to dispel some users' concerns: Will the small-capacity battery be damaged when a small-capacity battery is connected in parallel with a large-capacity battery? Relevant data analysis, a battery with an internal resistance of 100Ah/12V, tested in a floating state after one year The internal resistance obtained is about 6m, while the internal resistance of a new 200Ah/12V battery is 0.6~0.7m, and a new 3000Ah/2V battery is 50~70μ. (3) The capacity of the battery of the same capacity is different at the same time under different temperature. The lower the temperature, the smaller the capacity. The significance of knowing this feature is that in order to meet the requirements, the local operating temperature must be mastered when the backup time is particularly strict. (4) There are certain restrictions on battery charging current. If the charging current is too small, it will affect the timely recovery of the battery capacity, which is very important for the bad power grid. In this case, the battery life will decay quickly; if the charging current is too large, the internal temperature of the battery will rise too high. The lighter ones make the battery shell swell, and the heavy ones cause the outer shell to break. There are also certain restrictions on the voltage of the battery charger, because too high a charging voltage will increase the reaction of the electrolyzed water and shorten the battery life; a low charging voltage will make the chemical reaction in the battery insufficient and will shorten the battery life. (5) Different battery discharge currents require different termination voltages. As the discharge current increases, its termination voltage can also be appropriately reduced. This is because the chemical reaction of the battery is required to proceed violently during high current discharge, which hinders the movement of charged ions, which results in a rapid drop in terminal voltage, which is forced to stop the discharge. After that, the ions that have not had time to move to the electrode continue to react, causing the terminal voltage to rise; but if it is a small current discharge, since the movement and reaction of the charged ions have sufficient time, if the terminal voltage is still the same as the large current discharge, the discharge will stop. It will cause the battery to suffer a lot of damage, and even no longer be able to restore the capacity, so that the battery's life will end early. Therefore, the shutdown voltage of many UPSs is based on the discharge current. (6) If the float voltage of the battery is kept unchanged, the battery life will decrease as the ambient temperature rises. Therefore, temperature compensation charging links are set in many UPSs. The higher the temperature, the faster the capacity loss of the battery, because the leakage current of the battery increases as the temperature increases. Therefore, it is necessary to charge the battery in time according to the requirements. Generally, there are recommended times in the manual, such as charging once in 4 to 6 months in winter, and charging once in 2 to 3 months in summer. If the battery is not charged in time, the lighter ones will reduce the battery capacity, and the more serious ones will make the battery capacity unable to recover. IEEEStd11881996 recommends: When the capacity of the fixed backup battery drops below 80%, it is regarded as the end of life, because the battery will accelerate aging from then on. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How long is the true life of the lithium iron phosphate battery?