The major cell phone battery manufacturer tells you the most potential battery
Following nickel-cadmium and nickel-hydrogen batteries, lithium-ion batteries are undoubtedly one of the most promising and fastest-growing batteries in the market, and are favored by major cell phone battery manufacturer. Lithium ion will also replace other batteries, and continue to expand market share and application areas. So what are lithium-ion batteries, and what are their advantages and potentials? Let the major cell phone battery manufacturer be so obsessed with it?
Lithium-ion batteries with lithium cobalt oxide as cathode materials are not suitable for high-current discharge, and when discharged at excessive current, the discharge time will be reduced (internal temperature will produce higher energy loss), and may be dangerous; but lithium-ion batteries with lithium ferric phosphate as cathode materials can be 20C or even greater (C is the capacity of the battery, such as C = 800mAh). The 1C charging rate is 800mA high current, which is especially suitable for electric vehicles. Therefore, the maximum discharge current is given in the battery production plant, which should be less than the maximum discharge current in use. Lithium-ion batteries have certain temperature requirements, the factory gives the charging temperature range, discharge temperature range and storage temperature range, overvoltage charging will cause permanent damage of lithium-ion batteries. The charging current of lithium-ion batteries should be based on the recommendations of the major cell phone battery manufacturer and limited-current circuits should be required to avoid overcurrent (overheating). The commonly used charging rate is 0.25C ~ 1C. When charging a large current, it is often necessary to detect the battery temperature to prevent overheating or damage to batteries.
The research of lithium-ion batteries is an interdisciplinary field involving chemistry, physics, materials, energy, electronics and many other disciplines. At present, the progress in this field has aroused great interest in the field of chemical power and industry. It can be predicted that with the development of research, all kinds of cathode and anode materials with regular or doped composite structures and their corresponding functional electrolytes designed at the molecular level will greatly promote the research and application of lithium-ion batteries.
Major cell phone battery manufacturer charge lithium-ion batteries in two stages: first constant-current charging, to close to the termination voltage when the constant-voltage charging. For example, a battery of 800mAh capacity, whose termination voltage is 4.2V. The battery is charged at a constant current of 800mA (charge rate is 1C). When the battery voltage approaches 4.2V, it is charged at a constant voltage of 4.2V. The current drops gradually, and the voltage changes little. When the charge current drops to 1/10-50C (the set value of each factory is different, it does not affect the use), it is considered that close to full, the charge can be terminated. Electricity (some chargers start the timer after 1/10C, end the charge after a certain time).
The advantages of lithium ion battery produced by major cell phone battery manufacturer are as follows:
1, High energy density.
2, The open circuit voltage is high.
3, No memory effect.
4, Low self-discharge.
5, Wide operating temperature range.
6, Lithium battery has a long service life
7, Control circuit