Why does the battery capacity decay?

The battery should always calculate its capacity decay and final life. The battery pack needs to be replaced when the capacity drops to 80%. The final life limit of the battery pack should be changed according to different applications, user preferences and company guarantees. Since mechanical failures are relatively rare, capacity degradation has become the best indicator of the final replacement plan. This indicator can be completed by verifying the capacity of active batteries every three months. In addition, the technology for characterizing the charging operation status of the charger is also under development. Charging and discharging cycles are not the only cause of capacity degradation. Storing lithium-ion batteries at high temperatures can also cause capacity degradation. A fully charged lithium-ion battery will cause a 35% capacity loss if stored at 40°C (104°F) for one year without use. Ultra-fast charging and discharging is also harmful to the battery, which will reduce the battery life by half, which is very obvious about the single lithium ion battery. The battery pack has a higher specific energy, but it is particularly subtle due to the difference in the single battery. As the usable area of u200bu200bthe battery shrinks, the energy that can be filled decreases, and the charging time is gradually shortened. In most cases, the battery capacity decays linearly due to cycle cycles and aging. In addition, the pressure on the battery caused by deep discharge is greater than that of incomplete discharge, so it is best not to exhaust the battery, but to charge it frequently. Regarding the nickel-based battery and the calibration component, it should be periodically discharged deeply, which helps to eliminate the memory effect of the nickel-based battery. The nickel base can be fully charged and discharged for 300 to 500 weeks before the capacity decays to 80%. The specifications of equipment are often based on new batteries, but this is only a short-term phenomenon during the initial test phase, and cannot be maintained for too long. Just like a sports athlete, performance will gradually decline over time, and if left unchecked, it will eventually lead to battery-related failures. In addition to aging-related attenuation, sulfation and grid corrosion are important factors affecting the attenuation of lead-acid batteries. Sulfation refers to the thin film layer formed on the cathode plate when the battery stays charged at a lower rate. If it is found in time, this situation can be eliminated by equalizing charging. Grid corrosion can be reduced by improving the state of charge or adopting an optimized floating charging method. In nickel-based batteries, the so-called unusable rock area is usually caused by the formation of active material crystals, which is also known as the memory effect. The method of deep charge and discharge cycles can often restore the battery capacity to full capacity. Periodic discharge can also control the crystallization process and prevent damage to the diaphragm. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What is the difference between a lithium iron phosphate battery and a ternary lithium battery?