What factors affect the performance and life of lithium batteries?
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2020/12/11 10:16:59
In the 1970s, M.S.Whittingham began working on lithium-ion batteries.He was later called the "father of the lithium-ion rechargeable battery" and won the Nobel Prize in chemistry in 2019.
Due to its very active chemical properties, lithium metal is especially prone to chemical reactions, so the processing, preservation and use of lithium metal have very high environmental requirements.At the same time, the lithium battery is a complex chemical reaction system, which requires high storage environment.
So what factors affect the performance and life of lithium batteries?In daily use, how should we extend its service life?
I. Discharge depth and rechargeable times
The number of recharges is related to the discharge depth. The deeper the battery discharge depth, the less the number of recharges.The number of rechargeable times * discharge depth = the total number of completed charge cycles. The higher the total number of completed charge cycles, the higher the battery life, that is: the number of rechargeable times * discharge depth = the actual battery life
2.Overcharge, overdischarge, and large charge and discharge current
Any form of overcharge will lead to serious damage to the performance of lithium batteries, even explosion, to avoid overcharge to the battery.
At the same time, to avoid less than 2V or 2.5V deep discharge, otherwise it will quickly and permanently damage the lithium ion battery, may also occur internal metal plating, causing a short circuit, making the battery unusable or unsafe.Also, avoid large charging and discharging currents, which put too much pressure on the battery.
3. Overheated or overcooled environment
Temperature has great influence on lithium battery life.Subzero conditions are likely to cause lithium-ion batteries to burn out as soon as the electronics are turned on, while overheating can reduce the battery's capacity.Turn off digital gadgets in the heat of the sun or in a sweltering car, as lithium-ion batteries age faster when temperatures exceed 60.Lithium battery charging temperature range: 0-45℃, lithium ion discharge temperature range: 0-60℃.
4. long time full power, no power state
Too high or too low power state, is not conducive to maintaining the life of the lithium battery.When the battery is in a state of no or low power for a long time, the resistance to the electronic movement inside the lithium battery will increase, leading to the decrease of the battery capacity. The lithium battery should be in the intermediate state of power, i.e. the battery life is the longest under the condition of 50% power.In general, maintaining 10 to 90 percent power is good for battery protection.
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