1. The depth of discharge
Discharge depth refers to the point at which discharge begins to stop during use. 100% depth refers to the full capacity of discharge. The life of lead-acid battery is greatly affected by discharge depth. Design considerations focus on deep recycling, shallow recycling, or floating charging. If the shallow cycle battery is used for the deep cycle, the lead acid battery will soon fail.
There is a large amount of gas precipitation when overcharging, then the positive plate active substance suffers from the impact of gas, this impact will promote the fall off of the active substance; In addition, the positive gate alloy is also corroded by heavy anodizing, so the battery’s life is shortened when it is overcharged.
3. The temperature influence
The life of lead-acid battery is prolonged with increasing temperature. Between 10℃ and 35℃, each increase of 1℃, can prolong the life 5-6 cycles; When the temperature is higher than 45℃, the life is reduced due to the loss of negative vulcanization capacity.
4. The effect of sulfuric acid concentration
Although the increase of sulfuric acid density is beneficial to the capacity of the positive plate, but the self-discharge of the battery increases, the corrosion of the grid is accelerated, and the loose shedding of lead dioxide is also promoted. With the increase of the acid density used in the battery, the cycle life decreases.
5. Discharge current density
As the discharge current density increases, the battery life decreases, because the high current density and high acid concentration cause loose shedding of positive lead dioxide.