Types of storage batteries The main function of storage batteries is to start the engine and power the entire vehicle's electrical equipment at low engine speeds.

　　The requirements for storage batteries are: large capacity, low internal resistance, and sufficient starting ability. Storage batteries include wet-charged storage batteries, dry-charged storage batteries, low-maintenance storage batteries, and maintenance-free storage batteries. Basically, modern devices use maintenance-free storage batteries. Most of the early batteries were ordinary lead-acid storage batteries, and electrolyte (distilled water) needed to be added regularly, but the price was relatively cheap. As the technology matures, maintenance-free storage batteries that are more convenient to use are becoming more and more popular, but the price Relatively also rose a lot. Lead-acid storage batteries are composed of positive and negative plates, separators, shells, electrolyte, and terminal posts. The chemical reaction of their discharge depends on the active material of the positive plate and the negative plate in the electrolyte (dilute sulfuric acid solution). Under the action, the grid of the pole plate is made of lead antimony alloy. Traditional storage batteries will lose liquid 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 respectively, causing The electrolyte is reduced. The maintenance-free storage batteries are made of lead-calcium alloy. Because storage batteries use lead-calcium alloy as the grid, the amount of water decomposed during charging is small, and the amount of water evaporation is also low. In addition, the outer casing adopts a sealed structure to release sulfuric acid. There is also very little gas, so compared with traditional storage batteries, it has the advantages of no need to add any liquid, less corrosion to terminal posts, wires and body, strong resistance to overcharge, large starting current, and long battery storage time. Very popular in China in recent years.