BATTERY DISCHARGE RATE
Did you know that the Discharge Rate of a batter has a huge impact on the Life Span depends on the way how you manage them? The deeper your discharge rate is, the shorter the lifespan. Refer to the table above. This shows you the state of charge. For more information on how to extend the lifespan of your batteries feel free to contact us on info@bhgpower.co.za. You may also read the article on my blog ” 5 Tips and Tricks to Extend UPS Battery Life” https://bhgpower.co.za/extend-ups-battery-life/
The actual resting voltage, or the voltage a battery will settle at 12-24 hours after being removed from the charger, is closer to 2.1 volts per cell, or about 6.4 volts for a 6v battery, and 12.7 volts for a 12v battery. These numbers assume 100% healthy cells and may vary a bit lower for older batteries.
Discharge Rate Battery
The discharge rates and Charge and of a battery are governed by C-rates. The capacity of a battery is commonly rated at 1C, meaning that a fully charged battery rated at 1Ah should provide 1A for one hour. The same battery discharging at 0.5C should provide 500mA for two hours, and at 2C it delivers 2A for 30 minutes. Losses at fast discharges reduce the discharge time and these losses also affect charge times.
A C-rate of 1C is also known as a one-hour discharge; 0.5C or C/2 is a two-hour discharge and 0.2C or C/5 is a 5-hour discharge. Some high-performance batteries can be charged and discharged above 1C with moderate stress. Table 1 illustrates the typical times at various C-rates.
DISCHARGE
When discharging a battery with a battery analyzer capable of applying different C rates, a higher C rate will produce a lower capacity reading and vice versa. By discharging the 1Ah battery at the faster 2C-rate, or 2A, the battery should ideally deliver the full capacity in 30 minutes. The sum should be the same since the identical amount of energy is dispensed over a shorter time. In reality, internal losses turn some of the energy into heat and lower the resulting capacity to about 95 % or less. Discharging the same battery at 0.5C, or 500mA over 2 hours, will likely increase the capacity to above 100 %.
