Analysis on the three-year maintenance of the battery

Check the connection points between all batteries and ensure that the connections are tight and reliable; take out a few batteries at will for internal resistance detection. Because the internal resistance of the battery is wirelessly related to its capacity, the internal resistance of the battery cannot be used to directly indicate the accurate capacity of the battery. However, the internal resistance of the battery can be used as an indicator of the health of the battery. The depth of deep discharge has a great influence on the cycle life of the battery. If the battery is often deeply discharged, the cycle life will be shortened. Because the deep discharge of the battery with the same rated capacity means that high-current charging and discharging are often used. When high-current discharges or often under-voltage conditions cannot be recharged in time, the sulfate particles appearing are large, and the active material on the plate cannot be removed. Fully used, the actual capacity of the battery will gradually decrease over a long period of time, which will affect the normal operation of the battery. Since solar photovoltaic power generation systems are generally not prone to overcharging, long-term power deficit is an important reason for battery failure and shortened life in solar photovoltaic systems. The discharge rate generally stipulates that the capacity of the 20-hour discharge rate is the rated capacity of the battery. If you use a discharge rate lower than the specified hour, you can get a battery capacity higher than the rated value; if you use a discharge rate higher than the specified hour, the discharged capacity is smaller than the rated capacity of the battery, and the discharge rate also affects the battery terminal Voltage value. When the battery is discharged, the electrochemical reaction current is preferentially distributed on the surface closest to the main solution, resulting in the formation of lead sulfate on the electrode surface and blocking the inside of the porous electrode. The above-mentioned problems become more prominent during high-current discharge, so the larger the discharge current, the smaller the capacity given by the battery, and the faster the terminal voltage value declines, that is, the end-of-discharge voltage value decreases with the increase of the discharge current. But on the other hand, it’s not that the lower the discharge rate, the better. Some studies have stated that a long-term too small discharge rate will increase significantly due to the amount of lead sulfate molecules produced, and the occurrence of stress will cause the plate to bend and the active material to fall off, which will also reduce the battery’s performance. Service life. 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 post: How is Ni-MH better than lithium batteries?