What are the mistakes in lithium battery discharge?

"The more lithium batteries are discharged, the greater the battery loss," said Tom Hartley, an electrical engineering professor who helped NASA study extended battery life. "The more charged the battery, the greater the battery loss. Lithium batteries are best placed in the middle of the charge, so that the battery life is the longest. "

First, the excessively high and too low state of charge has the most adverse effect on the life of the lithium battery, and the number of charge and discharge cycles is secondary. In fact, most of the resellers that are sold on electrical appliances or on the battery are recharged based on 80 percent of the discharge. Experiments have shown that for some laptop lithium batteries, the battery voltage often exceeds the standard voltage of 0.1 volts, that is, from 4.1 volts to 4.2 volts, then the battery life will be halved, and then increased by 0.1 volts, the life is reduced to the original 3 One of the points; a long-term low-power or no-power state will cause the internal resistance of the battery to move more and more, resulting in a smaller battery capacity. NASA's NASA sets the battery's power consumption on the Hubble Space Telescope at 10 percent of its total capacity to ensure that the battery can be recharged and discharged 100,000 times without having to be updated.

Second, temperature also has a greater impact on the life of lithium batteries(mobile phones and other small electronic devices are negligible). The environment below freezing point may cause the lithium battery to burn down the moment the electronic product is turned on, while the overheating environment will reduce the battery capacity. Therefore, if the laptop uses the external power supply for a long period of time and does not remove the battery, the battery will be in the high heat discharged from 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 to ensure the capacity and life of lithium batteries:

At present, most batteries of electronic products use lithium batteries. Since the advent of lithium ion batteries in 1990, their outstanding performance has been rapidly developed and widely used in society. Lithium battery manufacturers have thus achieved the largest scale. Development. Lithium batteries do not need to be charged to 100 percent of the electricity, let alone used up. When the situation permits, the battery's power is maintained near the half-full state, and the smaller the charge and discharge, the better;

The factory design of GM's Chevy Volt electric car is to force the battery power to be maintained at 20 % to 80 %, and Apple's built-in batteries may also use this method(including other laptops and electronics). Increase the number of chargeable discharge cycles of the battery.

Do not allow lithium batteries(especially notebook lithium batteries) to work for a long time when the device uses an external power supply. Even if your laptop heats up well, 100 percent of the electricity in a long time is equivalent to the murder of a lithium battery.

1. If you use the external power supply to power the notebook computer for a long time, or the battery power has exceeded 80 %, immediately remove the battery of your notebook, and do not need to charge the battery to fill it with about 80 %. Adjust the power options of the operating system and switch the battery alarm to more than 20 %. In peacetime, the battery power should not be less than 20 %. Before it drops to 20 %, it must be charged.

2. Small electronic devices such as mobile phones, when charged, should immediately disconnect the power cord(including the USB interface for charging functions), which will continue to damage the battery; To charge often, charge when you remember, but you don't have to fill the battery;

3. Whether it is a notebook or a mobile phone, do not let the battery run out;

4. If you want to travel, fill up the batteries, but remember to charge the appliances whenever conditions permit. For battery life, don't wait until the batteries are dry.

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