Why the capacity of lead-acid batteries will decrease

Tags: Why does the capacity of lead-acid batteries decrease? First of all, I can see from the structure of lead-acid batteries. The positive plate of a lead-acid battery is the main factor affecting the working life of the battery. The capacity of the lead-acid battery charge-discharge cycle, especially the capacity drop under deep cycle is closely related to the quality deviation of the positive plate. The corrosion rate of the grid depends on the composition of the grid alloy, but the higher the storage temperature, the faster the corrosion rate, and the deeper the depth of discharge, the more severe the corrosion. From the perspective of the chemical reaction of lead-acid batteries. In the normal operation of the battery, the PbSO4 particles on the negative plate are small, and the discharge can easily return to velvet lead, but sometimes lead sulfate is generated inside the battery which is difficult to reduce, which is called sulfation. There are many reasons for the salting of the negative electrode, such as the inability to charge in time after discharge, long-term storage of the battery, causing serious self-discharge, excessive electrolyte concentration, insufficient long-term charging, and long-term discharge at high temperature. This lead sulfate is difficult to reduce by conventional methods. In this way, the reduction of active materials will inevitably affect the capacity of lead-acid batteries. Therefore, we have repeatedly emphasized that battery storage must have a serious maintenance system to ensure battery quality. Finally, there may be a relatively long period of time from production to sales to use of batteries. The batteries cannot be installed and used in time, resulting in long-term storage. The temperature has a great influence on the self-discharge of the battery. Long-term storage is bound to cause self-discharge Cause a lack of capacity.
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