Analysis on the influence of temperature on battery performance

Analysis of the influence of temperature on battery performance. It can be seen from the chemical reaction equation of lead-acid batteries that the positive plate of lead-acid batteries is on PbO2, and the negative plate is on Pb. The conductivity and physical properties of the two substances change little with temperature, so it can be said that the effect of temperature on the discharge performance of lead-acid batteries is due to sulfuric acid, as long as its activation characteristics (dissociation degree and ion removal rate) are temperature-dependent. The sulfuric acid electrolyte temperature of the battery is high, the capacity output is large, and the electrolyte temperature is low, and the capacity output is small. According to the reasons for this situation, in addition to the temperature drop, the solubility of lead sulfate in the sulfuric acid electrolyte will also decrease due to the temperature drop. It is necessary to saturate the surrounding plate of lead ions to force the formation of lead sulfate crystals and prevent fine crystals. The active material is in full contact with the sulfuric acid electrolyte, thereby reducing the battery capacity output. If the temperature of the sulfuric acid electrolyte is higher in the discharge of the battery, this will reduce the PbSO4 that is excessively saturated with the sulfuric acid electrolyte on the surface of the board, which is conducive to the formation of dilute lead sulfate crystals. Active material for longevity. When the battery is charged, the temperature of the electrolyte is too high, which will accelerate the dispersion of the electrolyte and aggravate the corrosion of the electrode grid, thereby shortening the service life of the battery. Conclusion: 1) When the battery is charged, the corrosion of the electrode plates and the lead alloy grid increases with the increase of the temperature of the electrolyte. 2) In the battery, the corrosion of the lead alloy grid on the positive plate is greater than the corrosion of the lead alloy grid on the negative plate. 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: Analysis of fast charging technology for lithium iron phosphate batteries