Lithium batteries have more superior performance than lead-acid batteries, and how to improve the low-temperature performance of lithium batteries has always been the focus of consumer concern.

　　Improving the low-temperature performance of lithium batteries, especially lithium iron phosphate batteries, starts from four aspects: positive electrode, negative electrode, electrolyte, and binder.

　　1. The cathode material adopts lithium iron phosphate cathode material with a particle size of 100 to 200 nanometers, which has better low-temperature characteristics.

　　2. The granular graphite with large layer spacing and small particle size in the negative electrode material can effectively improve the charging performance of lithium batteries at low temperatures.

　　3. Ordinary electrolyte is easy to freeze at -30℃, the viscosity increases, and the formation performance deteriorates. Adding low-temperature additives to the electrolyte can improve the discharge performance of lithium batteries at low temperatures.

　　4. use linear adhesive. When a dot-shaped adhesive is used for charging and discharging at -20℃, the pole piece is the current situation of adhesive failure. This problem does not exist with linear adhesives.

　　After improving the positive electrode, negative electrode, electrolyte, and binder, the low-temperature performance of lithium iron phosphate battery can reach 62.9% at a temperature of -30℃, and the constant current ratio of 0.5C can reach 62.9%, and 94% can be discharged at a temperature of -20℃. The nominal capacity of the lithium battery has greatly improved the low-temperature performance of the lithium battery than before.

　　Of course, the heating system and heat preservation system of BMS can also improve the low temperature performance of lithium batteries.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect substitute for lead-acid batteries, and are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data centers and other industries.