1. The composition of the battery: dry battery and rechargeable battery: zinc sheet (iron sheet), carbon rod, mercury, sulfate, copper cap; the battery is mainly made of lead compounds. Example: No. 1 zinc waste. and manganese The composition of the battery weighs about 70 grams, including 5.2 grams of carbon rod, 7.0 grams of zinc skin, 25 grams of manganese powder, 0.5 grams of copper cap and 32 grams of others.
2. Structure of lithium battery.
p>The structure of lithium battery is very simple, as shown in the figure. As for the actual battery, the structure is more complicated, for example, in a cylindrical shape. Battery such as 18650, the layers in the picture are in the form of sheets. It is formed into a cylindrical battery. In addition, there must be a safety valve for the exhaust to prevent lithium ions from escaping through the electrode borngative. >
Lithium batteries generally have two shapes: cylindrical and rectangular. The internal structure of the battery is a spiral winding structure, with very thin, highly permeable polyethylene film insulating material separated between the positive and negative electrodes. The positive electrode includes a lithium collector made of lithium and cobalt dioxide and a current collector made of aluminum film. The negative electrode consists of a lithium collector made of carbon foil material and a current collector made of copper film. The battery is filled with an organic electrolyte solution. In addition, a safety valve and PTC element are installed to protect the battery from damage caused by abnormal conditions and output short circuits.
The voltage of a single lithium battery is 3.6V, and the capacity cannot be infinite. Therefore,Single lithium batteries are often connected in series or parallel to meet the requirements of different occasions.