What does the AH of the battery mean? What are the influence factors of AH on the battery

AH is a unit to measure the capacity of a power storage device, ah is ampere hour, is the capacity of the battery, is an important indicator of battery performance. For example, if your battery is 14Ah, it means that it can be discharged for 1 hour with a current of 14A. Influencing factors of battery capacity AH Temperature has a great influence on the capacity of lead-acid batteries. Generally, with the decrease of temperature, the capacity decreases, and the relationship between capacity and temperature is as follows. When the temperature of the electrolyte decreases, the viscosity of the electrolyte increases, the ions receive greater resistance, the diffusion ability decreases, and the electrolyte resistance increases, which increases the resistance of the electrochemical reaction. Part of the lead sulfate cannot be converted normally, and the charge acceptance ability decreases. , Resulting in a decrease in battery capacity. The termination voltage affects the battery capacity. When the battery is discharged to a certain voltage value, the voltage drops sharply. In fact, the energy obtained is very small. If the battery is discharged for a long time, the damage to the battery is considerable. So it should be at a certain voltage The value terminates the discharge, the cut-off discharge voltage is called the discharge termination voltage. In the battery, there is a big difference in the utilization of active materials between the upper and lower parts of the electrode plate. Experiments have confirmed that the current density of the upper part of the electrode plate is about 2 to 2.5 times higher than that of the lower part of the electrode plate at the beginning of discharge. The progress of the discharge is gradually reduced, but the current density in the upper part is greater than that in the lower part. The influence of discharge rate on battery capacity The battery capacity decreases with the increase of the discharge rate, that is to say, the larger the discharge current, the smaller the calculated battery capacity. For example, a 10Ah battery can be stored for 2 hours with a 5A discharge. That is, 5×2u003d10; then only 47.4 minutes of electricity can be discharged with 10A discharge, which is 0.79 hours. Its capacity is only 10×0.79u003d7.9Ah. So the given battery discharges at different time rates will be different The capacity. When we talk about capacity, we need to understand the time rate or rate of discharge. Simply put, how much current is used to discharge. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Do you know what is the voltage range of the dry battery?