Introduction to misunderstandings about lithium-ion battery discharge

The longer the lithium battery is discharged, the more severe it will wear out, says Tom Hartley, a professor of electrical engineering at the University of Iowa. The more you charge, the easier it is to wear. Lithium batteries perform better during charging and therefore have a longer lifespan. First of all, the high and low state of charge have an adverse effect on the life of the lithium battery, followed by the number of charge and discharge. In fact, most electrical appliances or batteries are charged based on 80% discharge rate. Experiments have shown that in some notebook computers, the voltage of lithium batteries is often allowed to exceed the standard voltage of 0.1 volts, that is, rising from 4.1 volts to 4.2 volts, the battery life will be halved. Long-term low or no power will cause the internal resistance of electronic movement to become larger and larger, resulting in smaller and smaller battery capacity. The National Aeronautics and Space Administration (NASA) has set the Hubble Space Telescope’s battery consumption to 10% of its total capacity to ensure that it can charge and discharge 100,000 times without updating. Secondly, temperature has a great influence on the life of lithium batteries (it can be ignored in mobile phones and other small electronic devices). Conditions below the freezing point will cause the lithium battery to burn out when the electronic device is turned on, and overheating conditions will reduce the battery capacity. Therefore, if the external power supply is used for a long time without removing the battery, the battery will be exposed to the high heat released by the notebook computer for a long time. More importantly, the battery will be at 100% charge for a long period of time and will soon be scrapped. In summary, we can sum up the following points to ensure the capacity and life of lithium batteries: Since their inception in 1990, lithium batteries have been widely used in most electronic products. Lithium batteries have developed rapidly due to their excellent performance and wide application in society, and lithium battery manufacturers have also developed on a large scale. You don't need to fully charge the lithium battery, and don't worry about running out. When conditions permit, try to make the battery power close to half full state, the smaller the charging and discharging range, the better; Chevrolet Volt’s design requires that the battery must maintain 20% to 80% power, and Apple’s built-in battery can also use the same method ( Including some other notebook computers and electronic products) to increase the number of battery charging and discharging cycles. When the device is powered by an external power source, do not use lithium batteries (especially laptop batteries) for a long time. Even if your laptop has good heat dissipation, using 100% power for a long time will kill the lithium battery. 1. If you use an external power supply for a long time, or the battery power exceeds 80%, please remove the battery immediately. Adjust the power options of the operating system, set the power alarm above 20%, and the battery power should not be less than 20%. 2. Regarding mobile phones and other small electronic devices, the power cord (including the charging USB interface) should be disconnected immediately after charging, which will always damage the battery; charge frequently, remember to charge, but do not need to charge; 3. Whether it is a laptop or a mobile phone, Be sure not to let the battery run out. 4. If you are going to travel, you must fully charge the battery, but remember to charge the battery at any time, and don't wait for the battery to run out for the life of the battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: Reasons for thermal runaway of power lithium battery and countermeasures