Dry batteries
Dry batteries are chemical cells that produce direct current electricity using paste electrolyte, broadly divided into single and secondary batteries, which are commonly used in everyday life, and light batteries. The regular use of toys, radios and flashlight cameras also applies to power sources in various fields such as defence, scientific research, navigation and medicine。
Battery dry working principles
The main working principle of dry batteries is that oxidation is achieved in closed circuits
Chemical equation zn+2mno2+2nh4cl=zncl2+mn2o3+2nh3+h2o
Cells made of metal zinc skins, i. E. Negative poles, discharge of batteries is the electrolytic reaction of chlorinated ammonia and zinc, the released charge is transmitted from graphite to positive carbon rods, and the zinc electrolytic reaction releases hydrogen gas, which increases resistance within the battery, while manganese dioxide mixed with graphite is used to absorb hydrogen gas. However, if the batteries work continuously or are used for too long, manganese dioxide becomes too late or close to saturated to be absorbed, and the batteries lose their function because the internal resistance is too high and the output current is too small. However, when the battery is heated or placed for a certain period of time, its internal concentrations of hydrogen are heated or slowly released. Once manganese dioxide is restored, the battery will be alive again
Dry batteries are original batteries in the chemical power source and are a single-use battery. Because the electrolyte of this chemical power source is a paste that cannot be moved, it is called a dry battery, as opposed to a cell with a mobile electrolyte. Dry batteries apply not only to flashlights, semiconductor radios, recorders, cameras, electronic clocks, toys, etc., but also to various areas of the national economy such as defence, scientific research, telecommunications, navigation, aviation and medicine, which are very useful。
