Introduction to maintenance-free batteries

The sealed maintenance-free storage battery adopts the latest fully sealed structure and modern processing technology designed in the 1990s. Make it have high performance, long life, maintenance-free, safe and reliable outstanding performance. The general lead-acid battery of battery is composed of positive and negative plates, separators, casing, electrolyte and terminal posts, etc. The chemical reaction of its discharge is dependent on the active material of the positive plate (lead dioxide and lead) and the active material of the negative plate. (Sponge pure lead) is carried out under the use of electrolyte (dilute sulfuric acid solution). The grid of the electrode plate is made of lead-antimony alloy in traditional batteries, and the maintenance-free battery is made of lead-calcium alloy. The former uses antimony and the latter. With calcium, this is the fundamental difference between the two. Different materials will have different phenomena: traditional batteries will reduce the liquid during use. This is because the antimony on the grid will contaminate the spongy pure lead on the negative plate, which reduces the reaction in the battery after fully charged. The electromotive force causes excessive analysis of water, and a large amount of oxygen and hydrogen escape from the positive and negative plates respectively, which reduces the electrolyte. Substituting calcium for antimony can change the back electromotive force of the fully charged battery, reduce the overcharge current, and reduce the liquid vaporization speed, thereby reducing the loss of electrolyte. Because the maintenance-free battery uses a lead-calcium alloy grid, the amount of water analysis that appears during charging is low, and the amount of water evaporation is low. In addition, the sealed structure of the outer shell also releases less sulfuric acid gas. Therefore, compared with traditional batteries, It has the advantages of no need to add any liquid, less corrosion to the terminal posts and wires, strong resistance to overcharge, large starting current, and long power storage time. The maintenance-free battery has only a small amount of gas in the electrolyte under the normal charging voltage, and the plate has strong resistance to overcharging, and has the characteristics of small internal resistance, good low-temperature starting performance, and longer service life than conventional batteries. Therefore, there is no need to add distilled water during the entire period of use, and under normal conditions of the charging system, there is no need to remove it for supplementary charging. However, the specific gravity of the electrolyte should be checked during maintenance. Most maintenance-free storage batteries are equipped with a hole-shaped liquid (temperature-compensated) hydrometer on the cover, which changes color according to changes in the specific gravity of the electrolyte. It can indicate the storage state of the battery and the height of the electrolyte level. When the indicator eye of the hydrometer is green, it is declared that the battery is fully charged and the battery is normal; when the indicator eye has few green dots or is black, it is declared that the battery needs to be charged; when the indicator eye is light yellow, it is declared that there is a fault in the battery and needs to be repaired Replace it. When possible, the maintenance-free storage battery can be charged with a charging device with current-voltage characteristics. The device can ensure sufficient electricity, and can be warned of overcharging and consume more water. Generally, this kind of maintenance-free battery can be stored for 10 months from leaving the factory to use, and its voltage and capacitance remain unchanged. The voltage and capacitance of poor quality batteries will drop in about 3 months after leaving the factory. At the time of purchase, you can check whether the voltage and capacitance of the battery meet the requirements in the instruction manual. If the voltage and capacitance of the battery are reduced, it means that the material in it is not good, then the battery The quality of the battery is definitely not good, it may be disguised after being charged by the dealer. The maintenance-free storage battery can also be supplemented, and the charging method is basically the same as that of a general storage battery. When charging, the voltage of each cell should be limited to 2.3-2.4V. Note that charging with conventional charging methods will consume more water, and the charging current should be slightly smaller (below 5A) during charging. Fast charging is not allowed, otherwise, the battery may explode and cause injury. When the hydrometer of a maintenance-free battery is displayed in amber or red, it means that the battery is close to being scrapped, and its service life will not be long even if it is recharged. Charging at this time can only be used as an emergency measure. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it. Previous: Will the battery of a mobile phone really burst?