Battery Cell

A battery cell is the basic unit of a battery that converts chemical energy into electrical energy. It is typically a small, cylindrical device that contains two electrodes - a positive electrode (cathode) and a negative electrode (anode) - separated by an electrolyte. The electrodes are made of different materials that react with the electrolyte to produce a flow of electrons, creating an electric current.

Battery cells can be classified into two main types: primary cells and secondary cells.

Primary cells are non-rechargeable and are designed for single-use. Once the chemical reactions within the cell are exhausted, the battery cannot be recharged or reused. Examples of primary cells include alkaline batteries, lithium batteries, and zinc-carbon batteries.

Secondary cells, on the other hand, are rechargeable and can be reused multiple times. They can be recharged by applying an external electrical current that reverses the chemical reactions within the cell, restoring its energy storage capacity. Common examples of secondary cells include lithium-ion batteries, nickel-cadmium batteries, and lead-acid batteries.

Battery cells are used in a wide range of applications, from small portable devices like smartphones and laptops to larger-scale applications like electric vehicles and renewable energy storage systems.