What are the differences between maintenance-free batteries and traditional batteries?

The difference between maintenance-free batteries and traditional batteries According to the types of batteries available in the market, batteries can be roughly divided into two types: traditional lead-acid batteries and maintenance-free batteries that have just been popularized in China in recent years. Lead-acid batteries are composed of positive and negative plates, separators, shells, electrolyte and terminal posts, etc. The chemical reaction of its discharge is dependent on the use of the active material of the positive plate and the active material of the negative plate in the electrolyte (dilute sulfuric acid solution) Next, the grid of the pole plate is made of lead-antimony alloy. The phenomenon of liquid loss occurs in traditional batteries during use. This is because the antimony on the grid will contaminate the lead on the negative plate, causing excessive decomposition of water, and a large amount of oxygen and hydrogen will escape from the positive and negative plates, causing electrolysis. The fluid is reduced. The maintenance-free battery is made of lead-calcium alloy. Because the battery uses the lead-calcium alloy as the grid, the amount of water decomposition during charging is small, and the amount of water evaporation is also low. In addition, the sealed structure of the shell also releases sulfuric acid gas. Very few, so compared with traditional batteries, it has the advantages of no need to add any liquid, less corrosion to the terminal posts, wires and body, strong resistance to overcharge, large starting current, and long power storage time. The electrolyte (water) in the traditional lead-acid battery will be consumed, and water must be added on time; the so-called maintenance-free battery means that you do not need to check and add water (electrolyte) during the entire service life. Generally speaking, the work of adding water to the battery will be performed by a 4S repairman during regular maintenance, which is also a very simple maintenance. In terms of performance, the performance and durability of maintenance-free and water-refilling batteries are almost the same. Therefore, for buyers and users, there is not much difference between the two batteries, and there is no need to care about the battery to be maintained. Maintenance-free batteries have higher requirements for temperature and charge and discharge conditions. When charging with excessively high voltage, the internal pressure will consume water and acid if the internal pressure exceeds the threshold, and ordinary repair shops cannot supplement them, so performance degradation occurs The post-recovery performance is relatively poor, and because it is a lean battery, the discharge capacity of large current is relatively poor, which is not as good as the ordinary battery of the same capacity. In automotive electrical equipment, storage batteries are an important electrical equipment and one of the important power sources of automobiles. Now most automobiles use maintenance-free storage batteries. Many people think that maintenance-free storage batteries don't need attention. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.