Structure of dry battery

Stem cell name is largely derived from the structure of the battery characteristics. Because the electrolyte of this chemical power source is a paste that cannot flow, it is called a dry battery, which corresponds to the structure of a dry battery, and the wet battery is a chemical power source using a liquid electrolyte.

A dry battery is a primary battery in a chemical power source. Its reaction is to convert chemical energy into electrical energy. Some disposable fuel cells can also be included in the dry battery sequence. A dry battery is also called a primary battery, that is, the reactive substance in the battery cannot be used again after performing an electrochemical reaction discharge. Market-oriented dry batteries include zinc-manganese dry batteries, zinc-mercury batteries, magnesium-manganese batteries, and lithium-manganese batteries (button batteries).

The structure of the dry battery is composed of a negative electrode, a positive electrode and an electrolyte. Although the composition materials of the positive electrode and the negative electrode are different, the electrolyte is a paste, and irrespective of the reaction mechanism, the dry battery cannot be used for charging.

The most common on the market are zinc-manganese dry cell battery and alkaline manganese batteries, often called carbon-zinc and alkaline batteries.

The structure of the carbon dry battery is: a positive carbon rod in the middle, a mixture of graphite and manganese dioxide, and a fiber mesh with a paste ammonia chloride electrolyte on the outside, and the outer shell is zinc skin, which also serves as the negative electrode of the battery.

The structure of the alkaline dry battery differs from the structure of the carbon dry battery in two ways: one is to replace the NH4CL with a highly conductive paste-like KOH electrolyte, and the other is to change the outer casing to a steel cylinder, and the manganese dioxide layer is close to the steel cylinder. The structure of the alkaline dry battery determines that the battery reaction has no gas generation, the internal resistance is low, and the performance is more stable, and the market has a comprehensive replacement for the carbon battery.

Carbon battery structure alkaline battery structure

Of course, carbon batteries and alkaline batteries are the same structure of dry batteries, but in terms of use effect, the latter can reach 4 to 5 times of the former. It can be seen that the structure of dry batteries is different. do not.