Abstract：Lead acid batteries are the most common power source in the DC system of substations. In the event of AC power loss in the station, they can provide timely power to DC loads such as protection and measurement. However, valve regulated lead-acid batteries are prone to plate aging after prolonged operation. Study the effect of temperature changes on the aging defects of electrode plates. Considering the influence of temperature rise conditions, three different types of battery samples were prepared, and cyclic accelerated aging tests were conducted using lead calcium grid, lead antimony grid, and lead selenium low grid. The aging status of each group of samples under temperature rise conditions was tested. After experimental verification, it can be concluded that the total capacity of lead-antimony grid and lead-selenium low grid batteries is significantly lower than that of lead-calcium grid batteries when subjected to accelerated aging tests in high temperature environments (63 ℃), indicating that these two groups of samples are prone to capacity loss under high temperature conditions. Similarly, under the high temperature conditions, the internal resistance and current of these two groups of samples were significantly higher than those of lead-calcium grid batteries, indicating their poor performance in high temperature environments. High internal resistance can lead to increased energy loss during battery charging and discharging, and high current may affect the stability and lifespan of the battery. In addition, according to the test results under different temperature conditions (25 ℃, 35 ℃, and 45 ℃), the discharge time of the three sets of samples gradually accelerated, while the battery capacity gradually decreased. This indicates that the high-temperature environment will accelerate the aging process of the battery and lead to the loss of battery capacity. Among the three sets of batteries, the battery plates using lead-calcium grids have a relatively long service life and the slowest aging rate in high-temperature environments..
2024, Vol. 31 