Agm-type batteries use pure sulfuric acid solution as electrolyte, with a density of 1.29-1.3lg/cm3. Most of them exist in the glass fiber film, and the plate absorbs a part of the electrolyte outside. In order to provide a channel for the oxygen precipitated from the positive electrode to the negative electrode, 10% of the pores of the diaphragm must be kept free from the electrolyte, that is, the lean liquid design.
The electrode group is fitted tightly so that the plate is fully in contact with the electrolyte. At the same time, in order to ensure that the battery has enough usage life, the plate should be designed to be thick, and the positive plate grid alloy is Pb'-q2w-Srr--A1 quaternary alloy. AGM type sealed lead 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. The discharge capacity is smaller than that of today's colloidal sealed batteries.
Compared with batteries of the same specifications, the price is higher, but it has the following advantages :
1. The cycle charging capacity is 3 times higher than that of lead-calcium batteries, and the service life is longer.
2. It has higher capacitance stability in the whole service life cycle.
3. Low temperature performance is more reliable.
4. Reduce accident risk, reduce environmental pollution risk (due to acid 100% sealed pack).
5. Maintenance is simple, reducing deep discharge.
