Misunderstandings about lithium battery discharge
- Categories:Industry news
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- Time of issue:2022-05-12 15:49
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(Summary description)"The more you discharge a lithium-ion battery, the more it will wear out," says Tom Hartley, a professor of electrical engineering at Eckeland University who helps NASA study battery life extension. "The more you charge a battery, the more it will wear out. The best thing about lithium batteries is that they are in the middle of the battery, so they have a long battery life."
Misunderstandings about lithium battery discharge
(Summary description)"The more you discharge a lithium-ion battery, the more it will wear out," says Tom Hartley, a professor of electrical engineering at Eckeland University who helps NASA study battery life extension. "The more you charge a battery, the more it will wear out. The best thing about lithium batteries is that they are in the middle of the battery, so they have a long battery life."
- Categories:Industry news
- Author:
- Origin:
- Time of issue:2022-05-12 15:49
- Views:
"The more you discharge a lithium-ion battery, the more it will wear out," says Tom Hartley, a professor of electrical engineering at Eckeland University who helps NASA study battery life extension. "The more you charge a battery, the more it will wear out. The best thing about lithium batteries is that they are in the middle of the battery, so they have a long battery life."
First of all, too high and too low power state has adverse effects on the life of lithium batteries, and the number of charging and discharging cycles is of secondary importance. In fact, the number of recharges listed on most appliances or batteries is based on a baseline of 80 percent discharge. Experiments show that for some notebook computer lithium battery, often let the battery voltage 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 increase 0.1 volts, the life is reduced to a third of the original; Low or no charge for a long period of time will make the resistance to the movement of electrons inside the battery becomes bigger and bigger, so the battery capacity becomes smaller. NASA, America's space agency, has the battery on its Hubble Space Telescope set at 10 per cent of capacity to ensure that the battery can be charged and discharged 100, 000 times without needing to be renewed.
Second, temperature has a significant impact on lithium battery life (which is negligible for mobile phones and other small electronic devices). Conditions below freezing can cause lithium-ion batteries to burn up as soon as an electronic device is turned on, while overheating can reduce a battery's capacity. Therefore, if the battery is not removed after long-term use of external power supply, the battery will be in the high heat discharged from the notebook for a long time. More importantly, the battery will be in the state of 100 percent power for a long time and will be scrapped soon.
From the above, we can sum up the following points to ensure the capacity and life of lithium batteries:
At present, most of the batteries of electronic products use lithium batteries. Since the invention of lithium ion batteries in 1990, lithium ion batteries have developed rapidly because of their performance and have been widely used in society. Therefore, lithium battery manufacturers have also been developed on a large scale. You don't need to charge a lithium battery to 100 percent full, let alone run out of charge. In the circumstances allow, as far as possible to maintain the battery power in the near half full state, the range of charging and discharging as small as possible;
The Chevy Volt is designed to have a mandatory battery charge of 20% to 80%, and Apple's built-in battery may have done the same with other laptops and electronics, giving the battery an increased number of cycles to charge and discharge.
Do not use lithium batteries (especially notebook lithium batteries) for a long time in the device using external power supply under the condition of work. Even if your laptop dissipates heat well, 100 percent power for a long time is the murder of lithium batteries.
1. If you use an external power supply to power your laptop for a long time, or the battery power has exceeded 80%, immediately remove the battery of your laptop. It is not necessary to charge the battery fully, but charge it to about 80%. Adjust the power option of the operating system, set the battery alarm to more than 20%, usually the low battery power should not be less than 20%, it will be charged before the next 20%;
2. For small electronic devices such as mobile phones, disconnect the power cable (including the USB interface for charging function) immediately after charging, which will damage the battery; Charge as often as you remember, but you don't have to fully charge the battery;
3. Do not let the battery run out, whether it is for the laptop or the mobile phone;
4. If you're traveling, keep your batteries fully charged, but remember to charge your appliances whenever you can, and don't wait until your batteries drain for battery life.
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