What are the differences between lead-carbon batteries, lead-acid batteries and lead-carbon batteries?

The depth of discharge refers to the extent to which the discharge starts and stops during use. 100% depth refers to the discharge of the full capacity. The life of lead-acid batteries is greatly affected by the depth of discharge. The focus of design consideration is deep cycle use, shallow cycle use or floating charge use. If the shallow-cycle battery is used for deep-cycle use, the lead-acid battery will quickly fail. Because the positive electrode active material lead dioxide itself is not firmly bonded to each other, lead sulfate is generated during discharge, and it returns to lead dioxide during charging. The molar volume of lead sulfate is larger than that of lead oxide, and the volume of the active material expands during discharge. If one mole of lead oxide is converted into one mole of lead sulfate, the volume will increase by 95%. Repeated contraction and expansion will gradually loosen the bond between the lead dioxide particles and easily fall off. If only 20% of the active material of one mole of lead dioxide is discharged, the degree of contraction and expansion will be greatly reduced, and the destruction of the binding force will become slower. Therefore, the deeper the discharge depth, the shorter the cycle life. 2. Overcharge level A large amount of gas is released during overcharge. At this time, the active material of the positive plate is impacted by the gas, and this impact will promote the active material to fall off; in addition, the positive grid alloy is also subject to severe anodic oxidation and corrosion, so the battery Overcharging will shorten the application period. 3. The influence of temperature The lifespan of lead-acid batteries increases with the increase of temperature. Between 10°C and 35°C, for every 1°C increase, approximately 5~6 cycles will be added. Between 35°C and 45°C, each 1°C increase can prolong life by more than 25 cycles; above 50°C, The life span is reduced due to the loss of vulcanization capacity of the negative electrode. The battery life increases with increasing temperature within a certain temperature range because the capacity increases with increasing temperature. If the discharge capacity does not change, the depth of discharge decreases when the temperature rises, and the solid life is prolonged. The service life of lead-acid batteries is the number of years or the number of times of use_lead-carbon batteries, lead-acid batteries and lead-carbon batteries. 4. The influence of sulfuric acid concentration. The increase in acid density is beneficial to the capacity of the positive plate, but the battery’s The increase in self-discharge increases the corrosion of the grid, which also promotes the loosening and shedding of lead dioxide. With the increase in the acid density used in the battery, the cycle life decreases. 5. The influence of the discharge current density As the discharge current density increases, the life of the battery decreases, because under the conditions of high current density and high acid concentration, the positive lead dioxide is promoted to loosen and fall off. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Can lead-acid battery electric vehicles be replaced with lithium batteries?