What are the misunderstandings of lithium-ion battery discharge

First of all, too high and too low state of charge have an adverse effect on the life of lithium-ion batteries, and the number of charge and discharge cycles is of secondary importance. In fact, the number of rechargeable cycles marked on most of the electrical appliances or batteries sold is based on 80% discharge as a benchmark test. Experiments show that for some laptop lithium-ion batteries, the battery voltage often exceeds the standard voltage by 0.1 volts, that is, from 4.1 volts to 4.2 volts, then the battery life will be halved, and if it is increased by 0.1 volts, the life will be reduced to the original One-third; the long-term low or no power state will make the resistance of the battery to the movement of electrons become greater and greater, thus causing the battery capacity to become smaller. NASA has set the battery power consumption on its Hubble Space Telescope at 10% of the total capacity to ensure that the battery can be repeatedly charged and discharged 100,000 times without needing to be updated. Secondly, temperature also has a greater impact on the life of lithium-ion batteries (mobile phones and other small electronic devices can ignore this point). The environment below freezing point may cause the lithium-ion battery to burn out when the electronic product is turned on, and the overheated environment will reduce the battery capacity. Therefore, if the notebook is used for a long time without removing the battery from an external power source, the battery will be exposed to the high heat emitted by the notebook for a long time. More importantly, the battery will be in a state of 100% power for a long time and will soon be scrapped. From the above, we can summarize the following points for attention to ensure the capacity and life of lithium-ion batteries: At present, most electronic products use lithium-ion batteries. Since their introduction in 1990, lithium-ion batteries have been developed due to their excellent performance. With rapid development and widespread use in society, lithium-ion battery manufacturers have also developed on a large scale. Do not charge the Li-ion battery to 100% full, let alone run out of power. When the situation permits, try to keep the battery power as close as possible to a half-full state, and the smaller the range of charging and discharging, the better; the factory design of the general ChevyVolt electric vehicle is to force the battery power to be maintained at 20% to 80%, and The built-in battery of Apple laptops may also use this method (including some other laptops and electronic products) to increase the number of charge and discharge cycles of the battery. Do not use lithium-ion batteries (especially laptop lithium-ion batteries) for long periods of time when the device uses an external power source. Even if your laptop has good heat dissipation, 100% of the long-term power is equivalent to the murder of lithium-ion batteries. 1. If you use an external power supply to power your notebook computer for a long time, or the battery power has exceeded 80%, immediately remove the battery of your notebook. Normally, you don’t need to fully charge the battery. You can charge it to about 80%; adjust the power supply of the operating system. Option, adjust the battery level alarm to more than 20%. Normally, the battery level should not be less than 20%. Charge it before it drops to 20%; 2. For small electronic devices such as mobile phones, they should be disconnected immediately after being charged. Cables (including the USB port for charging function) will continue to damage the battery; charge frequently, just remember to charge, but you don’t have to fully charge the battery; 3. Whether it’s a laptop or a mobile phone, you must not let the battery run out; 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 the previous article: Introduction to the content of how to repair lithium-ion batteries