In contrast, the “saturation” mode is a low-amperage, high-voltage charging rate that occurs as the battery approaches a full charge. If the battery is in a good state-of-health (SOH), most battery chargers will maintain a high-amperage, low-voltage “bulk” charging mode until the battery regains its charge. The charging voltage of any battery is affected by the battery’s state-of-charge (SOC). A typical “float” or maintenance charge should be about 13.8 volts. Similarly, AGM batteries can be charged up to 14.40 volts without evaporating the water from the electrolyte. For this reason, the internal core temperature of an AGM battery shouldn’t exceed 120° F during the recharging process. Once the water boils from the electrolyte through a pressure-sensitive venting valve, it can’t be replaced. Unlike a flooded-cell battery, an AGM can be immediately damaged by overheating the electrolyte. The primary downsides to an AGM battery are its higher manufacturing cost and its sensitivity to over-charging. These combined features allow AGMs to function more efficiently in vehicles equipped with multiple high-load accessories like heated seats and windshields.
AGMs also have a lower self-discharge rate, and AGM battery life is longer because an AGM can endure a deep discharge cycle of up to 80% of its capacity without affecting battery life.
When testing open-circuit voltage, you’re probably going to see voltages in the 12.8-volt range rather than the 12.6-volt range we see in fully charged flooded-cell batteries.
0 kommentar(er)
