What is the effect of temperature on UPS lead-acid batteries?

What are the effects of temperature on UPS lead-acid batteries? As can be seen from the chemical reaction equation of lead-acid batteries, PbO2 is listed on the positive plate and Pb on the negative plate. The electrical conductivity and physical properties of these two substances change very little with temperature. Therefore, it can be said that the temperature effect of the discharge performance of lead-acid batteries is caused by sulfuric acid, because only its activation performance is related to temperature. The higher the temperature of the sulfuric acid electrolyte of the battery, the higher the capacity output, the lower the temperature of the electrolyte, the lower the capacity output. The reason for this situation is that in addition to the decrease in temperature, the solubility of lead sulfate in the sulfuric acid electrolyte will also decrease when the temperature decreases, which will inevitably saturate the lead ions around the plate and force the formation of sulfuric acid. Lead crystals are dense. This dense crystal hinders the full contact of the active material with the sulfuric acid electrolyte, thereby reducing the capacity output of the battery. 1. The impact of high temperature: In an environment greater than 40 degrees Celsius, the lifespan of UPS batteries will be doubled for every 10 degrees rise of lead-acid batteries. Causes: 1. Due to the increase in temperature, the UPS battery loses water faster, which accelerates the failure of lead-acid batteries in a dry manner. Acid drying is a fatal factor affecting the life of lead-acid batteries, and batteries are not suitable for use under high temperature conditions above 35°C. 2. Generally, heat occurs during the charging and discharging of the battery. When charging, the oxygen present in the positive electrode reaches the negative electrode, and a large amount of heat will appear when it reacts with the suede lead of the negative electrode. If it is not conducted away in time, the temperature of the battery will increase. If the battery is working in a high temperature environment, the heat accumulated inside it will be difficult to dissipate, which may cause the battery to overheat, increase the water loss, increase the internal resistance, and generate more heat, and a vicious cycle will gradually develop into thermal runaway, which will eventually lead to the battery. Failure, lead-acid battery due to extremely small heat capacity. 2. The effect of low temperature: the lower the temperature, the less storage capacity of the battery will lead to shorter mileage. For example: the electric car you buy can run about 80 kilometers at normal temperature with one charge, then when the climate temperature is minus 25 degrees, the mileage may only be about 30-40 kilometers. Therefore, the best operating temperature of UPS lead-acid batteries is 20-25 degrees Celsius. The influence of temperature on the internal resistance of the battery When the ambient temperature drops below 0°C, the internal resistance increases by about 15% for every 10°C decrease in temperature. Because the viscosity of the sulfuric acid solution increases, the resistance of the sulfuric acid solution increases, and the electrode is heavier. Polarized influence. UPS battery capacity will be significantly reduced. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: How to distinguish between lithium battery and storage battery?