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Recommended Charging Methods For Rechargeable Lithium Batteries
Oct 17, 2017

Almost all High-performance portable products use rechargeable lithium-ion batteries, including lithium-ion polymer batteries, this is because compared with other rechargeable batteries, lithium-ion batteries have a higher energy density, higher battery voltage, less self-discharge, very long cycle life, and environmental protection, and simple charging and maintenance. In addition, because of its relatively high voltage (2.9V to 4.2V), many portable products work with a single battery, simplifying the overall design of the product.Rechargeable Lithium Batteries

Avoid charging to 100% of the capacity. Select a lower floating voltage to do this. Lowering the floating voltage will improve the cycle life and service life, at the cost of reducing battery capacity. The floating voltage decreases 100mV to 300mV to extend the cycle life by 2 to 5 times times or longer. Compared with other chemical materials, lithium-ion cobalt chemical materials are more sensitive to higher floating voltages. Lithium phosphate batteries generally have a lower floating voltage than the more common lithium-ion batteries.Rechargeable Lithium Batteries Limit the battery temperature. Limiting the limit temperature of the battery can prolong battery life, especially by prohibiting charging under 0 ℃. Under 0 ℃ the charge facilitates the deposition of the metal on the anode of the battery, which may cause an internal short-circuit, generate heat and make the battery unstable and unsafe. Many battery chargers have devices that measure the temperature of the battery to ensure that they do not charge at the extreme temperature. Avoid large charge and discharge currents because this shortens the cycle life. Some chemical materials are more suitable for larger currents, such as lithium-ion manganese and lithium phosphate-ion batteries. The large current exerted too much pressure on the battery.Rechargeable Lithium Batteries

The recommended method for charging lithium-ion batteries is to provide a constant current with a ±1% limiting voltage to the battery until the battery is full of electricity and then stops charging. The methods used to determine when a battery is covered with electricity include: give the total charge time timing, monitor the charging current or both. The first method uses constant voltage limiting current, ranging from C/2 to 1C, which lasts 2.5 to 3 hours, allowing the battery to reach 100% charge. You can also use a lower charge current, but it will take longer.Rechargeable Lithium Batteries