30 milliohms.
The lifespan of a lithium battery is “500 times”, which does not refer to the number of charges, but to one cycle of charging and discharging.
Nowadays, cell phones use lithium batteries. The number of cycles of most lithium batteries is generally about 500 times, that is, 0 to 100 corresponds to one cycle (a cycle of 100 corresponds to one cycle). reached 500 times, the mobile phone battery has already weakened, the internal resistance of the battery has increased, the activity of chemical elements inside has decreased, and it has entered a rapid consumption stage.
Detailed informationStructure of lithium battery
Lithium batteries generally have two shapes: cylindrical and square. The internal structure of the battery is a spiral winding structure, with very thin and highly permeable polyethylene film insulation material.the separated between the positive and negative electrodes. The positive electrode includes a current collector made of lithium cobalt oxide and aluminum foil. The negative electrode consists of a current collector made of graphitized carbon material and copper foil.
Equipped with safety valve and PTC element (used in some cylindrical types) to protect the battery from damage under abnormal conditions and output short circuit. The voltage of a single lithium battery is 3.7V, and the battery capacity cannot be infinite. Therefore, single lithium batteries are often connected in series or parallel to meet the requirements of different occasions.
As the chemical properties of lithium metal are very active, the processing, storage and use of lithium metal have very high environmental requirements. With the developmentt science and technology, lithium batteries have now become common.
Baidu Encyclopedia-Lithium Battery