The service life of valve regulated sealed lead-acid batteries (VRLA batteries) is affected by various factors, and the float charging service life (i.e. the duration of long-term use in a float charging state) is usually used as the main reference indicator, generally between 3-10 years. The specific differences in lifespan are mainly determined by the following factors:
1、 Core influencing factors
Environmental temperature for use
Temperature is a key factor affecting lifespan. The optimal working temperature of the battery is 25 ℃, and for every 10 ℃ increase in temperature, the service life may be shortened by about half.
If used in an environment above 30 ℃ for a long time, the lifespan may be reduced to 3-5 years;
If used in a stable environment below 20 ℃, the lifespan can be extended to 6-10 years.
Charging and discharging system
Excessive floating voltage can lead to overcharging, accelerate electrode corrosion, and electrolyte consumption; If the voltage is too low, it may cause the electrode plate to sulfide due to undercharging, both of which will shorten the lifespan.
Frequent deep discharge (such as discharging to more than 50% of the rated capacity) will significantly reduce the cycle life, while shallow discharge (such as a small amount of discharge from a daily power supply) has a smaller impact on the life.
Battery Quality and Maintenance
High quality batteries (such as products with high-purity electrode plates and good sealing processes) have a longer basic lifespan;
Although VRLA batteries do not require regular water addition, regularly testing parameters such as float voltage and internal resistance to promptly troubleshoot (such as outdated individual batteries) can extend the overall service life.
2、 Typical lifespan for different application scenarios
Communication base stations and data centers (backup power supply): Long term floating charging, good temperature control, and a lifespan of usually 5-8 years.
**UPS power supply (frequent short-term discharge) * *: If the discharge depth is shallow and properly maintained, the lifespan is about 5-7 years; If there is frequent deep discharge, it may be shortened to 3-5 years.
Electric vehicles and medical devices (reusable): Due to frequent charging and discharging, the cycle life is usually calculated based on the number of charging and discharging cycles (about 300-500 cycles), and the equivalent service life may only be 2-4 years.
summarize
The service life of valve regulated sealed lead-acid batteries does not have a fixed value, and 3-10 years is a common range. In practical use, by controlling the ambient temperature (around 25 ℃), optimizing charging and discharging parameters, selecting high-quality products, and regularly maintaining them, their lifespan can be maximized.
