The performance of UPS batteries is very superior. In normal times, you should maintain a suitable ambient temperature, charge and discharge them regularly, and replace spent/bad batteries in time. The following mainly shares the characteristics of UPS batteries.

Whether it is a valve-regulated sealed lead-acid battery using glass fiber diaphragm (hereinafter referred to as AGM sealed lead-acid battery) or a valve-regulated sealed lead-acid battery using colloidal electrolyte (hereinafter referred to as colloidal-sealed lead-acid battery), they all use the principle of cathode absorption to make The battery is sealed.

After the UPS battery has been used for a period of time, the UPS battery will experience different degrees of loss. In order to save maintenance costs, some users will replace the battery with larger loss with a new one. However, many users do not know that this approach will greatly shorten the service life of the battery. Because there are more chemical reaction substances in the new battery, the voltage at the battery terminal is higher and the resistance is lower. However, the terminal voltage of the old battery is low and the internal resistance is large.

In the use of UPS batteries, sometimes new and old UPS batteries are used in series. As everyone knows, this approach will shorten the service life of UPS batteries. Because the new UPS battery has more chemical reaction substances, the terminal voltage is high, and the internal resistance is small (the internal resistance of the new 12V UPS battery is only 0.015-0.018Ω); while the terminal voltage of the old UPS battery is low, the internal resistance is large (12V The internal resistance of the old UPS battery is above 0.085Ω).

Due to the differences in the types of plates, manufacturing conditions and use methods, the reasons for the failure of batteries are different. To sum up, the failure of lead-acid batteries has the following situations: 1. Corrosion variant of positive plate There are three types of alloys currently used in production: traditional lead-antimony alloys, with an antimony content of 4% to 7% by mass; low antimony or ultra-low antimony alloys, with an antimony content of 2% by mass or less than 1% by mass Fraction, containing tin, copper, cadmium, sulfur and other modified crystal agents; lead-calcium series, actually lead-calcium-tin-aluminum quaternary alloy, the content of calcium is 0.06% to 0.1% mass fraction. The positive grids cast from the above alloys will be oxidized into lead sulfate and lead dioxide during the charging process of the battery, which will eventually lead to the loss of the function of supporting active substances and the battery failure; or due to the formation of lead dioxide corrosion layer, lead to lead dioxide. The alloy produces stress, which causes the grid to grow and deform. When the deformation exceeds 4%, the entire plate will be destroyed, and the active material will fall off due to poor contact with the grid, or short-circuit at the bus bar.