14450 lithium battery maximum capacity and parameters

The 14500 lithium battery is a lithium battery with a diameter of 14mm and a height of 50mm. According to the material of the battery, it is divided into lithium iron phosphate batteries and lithium cobalt oxide batteries. The voltage of the lithium cobalt oxide battery is 3.7V, and the voltage of the lithium iron phosphate battery is 3.2V. Because its size is the same as AA5# battery, 1 14500 lithium battery and 1 occupant barrel can be used instead of 2 AA batteries. Compared with nickel-hydrogen rechargeable batteries, lithium batteries have the advantages of light weight, less self-discharge, and superior discharge performance. Therefore, they are widely used by photographers in digital cameras and electronic cigarettes to replace nickel-hydrogen rechargeable batteries. What is the battery life? It should be okay. The key depends on what appliances you use and the frequency, intensity and duration of your use. Its nominal capacity is 1600mAh. At present, Japan’s Sanyo dominates the nickel-hydrogen battery. The highest capacity in mass production can reach 2700mAh. Don’t believe that some domestic brands of 3000mAh and above are basically a virtual standard. 2500mAh is not bad. NS. 14500 lithium battery parameter combination method: ICR14500-1S2P Nominal voltage: 3.7V Working voltage: 2.4~4.2V Nominal capacity: 1600mAh Standard continuous discharge current: 0.2C Maximum continuous discharge current: 0.5C Working temperature: Charging: 0~45 ℃ Discharge: -20~60℃ Product size: MAX15*29*51mm Finished internal resistance: ≤180mΩ Lead type: national standard line UL1571/26#, line length 100mm Protection parameters: overcharge protection voltage / 4.28±0.025V per string Discharge protection voltage 2.4±0.1V Overcurrent value: 3~7A14500 Lithium battery capacity overcharge problem After the lithium battery cell is overcharged to a voltage higher than 4.2V, side effects will begin to occur. The higher the overcharge voltage, the higher the risk. When the voltage of the lithium battery cell is higher than 4.2V, the number of lithium atoms remaining in the positive electrode material is less than half. At this time, the cell often collapses, causing a permanent decrease in battery capacity. If you continue to charge, since the storage cell of the negative electrode has been filled with lithium atoms, subsequent lithium metal will accumulate on the surface of the negative electrode material. These lithium atoms will grow dendrites from the surface of the negative electrode toward the direction of the lithium ions. These lithium metal crystals will pass through the separator paper and short-circuit the positive and negative electrodes. Sometimes the battery explodes before the short circuit occurs. This is because during the overcharging process, the electrolyte and other materials will crack to produce gas, causing the battery shell or pressure valve to swell and rupture, allowing oxygen to enter and react with the lithium atoms accumulated on the surface of the negative electrode. And then exploded. Therefore, when charging a lithium battery, the upper limit of the voltage must be set so that the battery's life, capacity, and safety can be taken into account at the same time. The ideal upper limit of the charging voltage is 4.2V. There is also a lower voltage limit when discharging lithium batteries. When the cell voltage is lower than 2.4V, some materials will begin to be destroyed. Also, because the battery will self-discharge, the longer it is left, the lower the voltage will be. Therefore, *do not stop when the battery is discharged to 2.4V. During the period when the lithium battery is discharged from 3.0V to 2.4V, the energy released only accounts for about 3% of the battery capacity. Therefore, 3.0V is an ideal discharge cut-off voltage. When charging and discharging, in addition to the voltage limit, the current limit is also necessary. When the current is too large, lithium ions will not have time to enter the storage cell and will gather on the surface of the material.