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1. Discharge Depth
Discharge depth refers to the extent to which the discharge begins to stop during use. The service life of lead-acid battery is greatly affected by the discharge depth. The key point of design consideration is deep cycle, shallow cycle or floating charge. If the battery with shallow cycle is used for deep cycle, the lead-acid battery will soon fail. Therefore, lead acid battery has the characteristic that deeper the discharge depth, the shorter cycle life.
2. Degree of Overcharging
When overcharging occurs, a large number of gases precipitate out. At that time, active substances on the plate are impacted by gases, which will promote the active substances to fall off. In addition, the positive grid alloy also suffers from serious anodic corrosion, so the battery overcharge will shorten the service life.
3. The Influence of Temperature
The service life of lead-acid accumulator increases with temperature. Between 10℃ and 35℃, 5 to 6 cycles will be increased for 1℃ increase. Between 35℃ and 45℃, more than 25 cycles will be prolonged for 1℃ increase, while the life will be reduced for the loss of negative vulcanization capacity if the temperature is higher than 50℃.
Battery life increases with temperature over a certain temperature range because capacity increases with temperature. If the discharge capacity is constant, the discharge depth decreases and the solid life is prolonged when the temperature rises.
4. Influence of Sulfuric Acid Concentration
The increase of acid density is beneficial to the positive plate capacity, but the increase of self-discharge of the battery, the corrosion of the grid is accelerated, which also promotes the loose shedding of lead dioxide. With the increase of acid density in the battery, the cycle life decreases.
5. Influence of Discharge Current Density
The battery life decreases as the discharge current density increases, because the high current density and high acid concentration cause the anode lead dioxide to fall loose.