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Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
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release time:2025-04-11 Hits: Popular:AG11 battery
Self - Discharge Rate of Lithium - Ion Batteries
The self - discharge rate of lithium - ion batteries is an important factor that affects their long - term performance and usability. Self - discharge refers to the gradual loss of charge in a battery when it is not in use and is not connected to a charging source.
Lithium - ion batteries generally have a relatively low self - discharge rate compared to some other battery chemistries, such as nickel - cadmium batteries. However, over time, self - discharge can still have a significant impact on the battery's state of charge. For example, if a tablet's lithium - ion battery has a self - discharge rate of 2% per month, after six months of non - use, it will have lost approximately 12% of its initial charge.
Several factors contribute to the self - discharge rate of lithium - ion batteries. Temperature is a major factor. Higher temperatures can accelerate the self - discharge process. When the battery is exposed to elevated temperatures, the chemical reactions that cause self - discharge occur more rapidly. For instance, storing a tablet in a hot car during summer can increase the self - discharge rate of its lithium - ion battery. On the other hand, extremely low temperatures can also affect the battery's performance and may increase self - discharge in some cases.
The state of charge of the battery also influences self - discharge. Batteries tend to self - discharge more rapidly when they are at a high state of charge. This is because the electrochemical reactions that lead to self - discharge are more favorable at higher charge levels. Therefore, it is often recommended to store lithium - ion batteries at a moderate state of charge, around 50%, to minimize self - discharge during long - term storage.
The quality of the battery materials and manufacturing process also play a role. High - quality batteries with well - engineered electrodes and electrolytes are likely to have a lower self - discharge rate. Impurities in the materials or defects in the manufacturing process can create sites for unwanted chemical reactions, increasing self - discharge. Additionally, the type of electrolyte used in the battery can affect self - discharge. Some electrolytes are more stable and can reduce the rate of self - discharge compared to others.
Understanding the self - discharge rate of lithium - ion batteries is crucial for tablet users. If a tablet is not going to be used for an extended period, it is advisable to charge the battery to an appropriate level and store it in a cool, dry place to minimize self - discharge. Manufacturers also need to consider self - discharge when designing battery management systems for tablets. These systems can monitor the battery's state of charge and take measures to counteract self - discharge, such as automatically topping up the charge when the battery level drops below a certain threshold.
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