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Battery Sulfation and Desulfators (Read 2799 times)
electron
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Battery Sulfation and Desulfators
Feb 13th, 2011 at 10:00pm
 
I thought I would post some interesting info on Battery Sulfation and charging.

"If possible in a well ventilated area and at room temperature, recharge a deep cycle battery each day it is used and as soon as possible after each use. The best way to prevent permanent lead sulfation when a starting or deep cycle battery (or battery bank) is not in use, is to maintain it's State-of-Charge at 100% by continuous float charging. If continuous float charging is not possible, recharge before the State-of-Charge drops below 80%. Permanent sulfation kills approximately 85% of all deep cycle and starting lead-acid batteries not in weekly service."

Battery Charging Steps

The Bulk stage is where the charger current is constant and the battery voltage increases, which is normally during the first 80% of the recharge.

The Absorption stage is where the charger voltage, depending on the battery type, is constant between 14.1 VDC and 14.8 VDC and the current decreases until the battery is fully charged, which is typically the last 20% of the recharge. (happens with more expensive battery chargers)

The Float stage is where the charge voltage, depending on the battery type, is reduced to between 13.0 VDC and 13.8 VDC at 80 F (26.7 C), held constant.

The Equalizing stage is a controlled 5% to 10% absorption overcharge to equalize and balance the voltage and specific gravity in each cell. Equalizing reverses the build-up of the chemical effects like electrolyte stratification where acid concentration is greater at the bottom of the battery. It also helps remove sulfate crystals that might have built up on the surface or in the pores of the plates. (again, this happens with more expensive battery chargers)
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