What's the difference between an AGM battery and a maintenance-free lead-acid battery?

1, Electrolyte characteristics are different

Deep Cycle Vrla Agm Battery, sealed Lead acid battery electrolyte amount is less, plate thickness is thicker, active substance utilization rate is lower than open type battery, so the battery discharge capacity is about 10% lower than open type battery.

Maintenance Free Lead Acid Battery, the biggest feature is "maintenance-free". And its electrolyte consumption is very small, during the service life of the basic need to refill distilled water. It also has the characteristics of shock resistance, high temperature resistance, small size and small self-discharge.

Compared with maintenance-free lead-acid batteries, AGM batteries have a higher price, three times higher cyclic charging capacity than lead-calcium batteries, and a longer service life. It has higher capacitance stability in the whole service life cycle. Low temperature performance is more reliable. Reduce the risk of accidents, reduce the risk of environmental pollution (due to acid 100% sealed pack).

Maintenance-free batteries are made of lead-calcium alloys, antimony in the former and calcium in the latter, and this is the fundamental difference between the two.

Traditional battery in the process of use will occur liquid reduction phenomenon, this is because the antimony on the grid will pollute the spongiform pure lead on the negative plate, weaken the back electromotive force in the battery after full charge, resulting in excessive decomposition of water, a large number of oxygen and hydrogen respectively from the positive and negative plate escape, so that the electrolyte is reduced.

4.For AGM batteries, in order to ensure sufficient battery life, the plate should be designed thick, and the positive grid alloy is Pb '-q2w-Srr--A1 quaternary alloy. AGM sealed lead battery electrolyte amount is less, the utilization rate of active substance is lower than open type battery, so the discharge capacity of battery is about 10% lower than open type battery.

Maintenance-free lead-acid batteries, capacitors can work in the ambient temperature of -30℃~+60℃, but also has the advantages of

fast charging, large current discharge, low internal resistance, cycle life of more than 100,000 times of ultra-long life.