Who has better low-temperature performance of lithium iron phosphate batteries than lead-acid batteries?

The use of lithium iron phosphate batteries is restricted in low temperature environments. In addition to severe deterioration of discharge capacity, lithium batteries cannot be charged at low temperatures. During low-temperature charging, the intercalation of lithium ions on the graphite electrode of the battery and the lithium plating reaction coexist and compete with each other. Under low temperature conditions, the diffusion of lithium ions in the graphite is inhibited, and the conductivity of the electrolyte decreases, which leads to a decrease in the intercalation rate and makes the lithium plating reaction more likely to occur on the graphite surface. The reason why the life of lithium batteries decreases when used at low temperatures is mainly due to the increase in internal impedance and the precipitation of lithium ions, which reduces the capacity. The low temperature of the lithium battery brings about a decrease in the activity of the positive and negative materials and the conductivity of the electrolyte. In response to the macroscopic view, a series of results such as a decrease in capacity, an increase in internal resistance, and a decrease in discharge efficiency appear. But the high temperature performance of lithium battery is good: the thermal peak of lithium iron phosphate battery can reach 350~500℃, the working temperature range is wide (-20~+75℃), and it can still release 100% capacity under high temperature (60℃). During the charging and discharging process of lead-acid batteries, there are electrochemical polarization and concentration polarization, and high-current charging and discharging are critically affected by concentration polarization. When the working temperature of a lead-acid battery drops below 0℃, the negative plate will undergo serious concentration polarization at the beginning of charging, which will limit the battery's charge acceptance, and cause the battery's charge and discharge to decrease as the temperature decreases. 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 influence of electrode polarization is aggravated. The battery capacity will obviously decrease. Compared with lead-acid batteries, lithium iron phosphate batteries have weaker low-temperature performance and high-current performance, which is absolutely unfavorable for starting power. The discharge performance of lead-acid batteries can cope with more harsh environments, and lithium batteries cannot be used in low-temperature areas. In addition to low temperatures, in summer exposure conditions, the high temperature of 60 to 70 degrees in the engine compartment can easily cause lithium electronics to be scrapped. In terms of high-current performance, most of the instantaneous current when the car starts is above 200A, and the performance of the lithium battery will drop rapidly under high magnification. At low temperatures, the discharge performance of lithium batteries will drop sharply, especially in winter. The relatively cold weather in the north has a very clear impact on lithium batteries. This was also verified when chatting with a Tesla owner before; and The low-temperature performance of lead-acid batteries is very good. According to internet query data, when discharged at a rate of 10C in an environment of -10 degrees Celsius, a voltage above 10V can be maintained for more than 90 seconds. 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: What are the important reasons for the fire of the power lithium battery