How to extend the cycle life of lithium-ion batteries?

1. Use partial discharge. Using only 20% or 30% of the battery capacity before recharging will greatly extend the cycle life. As a general rule, 5 to 10 shallow discharge cycles are equal to 1 full discharge cycle. Although the partial discharge cycle may reach thousands of times, keeping the battery in a fully charged state also shortens the battery life. If possible, the full discharge cycle should be prevented (down to 2.5V or 3V, depending on the chemical material). 2. Prevent charging to 100% of capacity. Choosing a lower float voltage can do this. Lowering the float voltage will increase cycle life and service life, at the expense of reduced battery capacity. Decreasing the float voltage by 100mV to 300mV can extend the cycle life by 2 to 5 times or longer. Compared with other chemical materials, lithium cobalt chemical materials are more sensitive to higher floating voltages. Lithium phosphate batteries generally have a lower float voltage than the more common lithium-ion batteries. 3. Choose an appropriate charging termination method. Choose a charger that uses the minimum charge current termination (C/10 or C/x) to extend battery life by not charging to 100% of the capacity. For example, ending the charge cycle when the current drops to C/5 has a similar effect to reducing the float voltage to 4.1V. In both cases, the battery is only charged to approximately 85% of its capacity, which is an important factor in determining battery life. 4. Limit battery temperature. Limiting the temperature limit of the battery can extend the battery life, especially prohibiting charging below 0°C. Charging below 0°C promotes the plating of metal on the anode of the battery, which may cause internal short circuits, heat generation and make the battery unstable and unsafe. Many battery chargers have devices that measure the temperature of the battery to ensure that it will not charge at extreme temperatures. 5. Prevent large charging and discharging currents, as this will shorten the cycle life. Some chemical materials are more suitable for higher currents, such as lithium manganese and lithium phosphate batteries. The high current exerts excessive pressure on the battery. 6. Prevent deep discharge below 2V or 2.5V, because this will quickly and permanently damage the lithium-ion battery. Internal metal plating may occur, which can cause a short circuit, making the battery unusable or unsafe. Most lithium-ion batteries have an electronic circuit inside the battery pack. If the battery voltage is lower than 2.5V, exceeds 4.3V during charging or discharging, or if the battery current exceeds a predetermined threshold, the electronic circuit will disconnect the battery. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete it.