Talking about the misunderstanding of lithium ion battery discharge

The more the lithium-ion battery is discharged, the greater the loss of the battery. At Ekron University, Tom Hartley, a professor of electronic engineering who helped NASA research to extend battery life, said that the more fully charged the battery, the more the battery’s The loss will be greater. Lithium-ion batteries are best in an intermediate state of power, in which case the battery life is the longest. First of all, too high and too low power states have the most adverse impact 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 recharges marked on most electrical appliances or batteries is detected based on 80% discharge. The test stated 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 laptop 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 laptop 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 processors have also achieved the largest scale development. Do not charge the Li-ion battery to 100% full, let alone run out of power. When circumstances permit, try to keep the battery power near the half-full state, the smaller the range of charging and discharging, the better; the factory design of the general ChevyVolt electric car 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 and charge it to about 80% without overflowing the battery; 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%. When it drops to 20%, it will be charged in the past; 2. Small electronic devices such as mobile phones should be disconnected immediately after they are fully charged. Cable (including the USb port for charging function), a straight stroke will damage the battery; charge often, remember to charge, but you don’t have to overflow the battery; 3. Whether it’s a laptop or a mobile phone, do not let the battery run out 4. If you are going to travel, let the battery overflow, but please remember to charge the appliance at any time when conditions permit. For the battery life, you must not wait until the battery is dry.