Lithium iron phosphate battery uses lithium iron phosphate (LiFePO4) as the positive electrode material and carbon as the negative electrode material.  When the battery is charging, part of the lithium ions in the lithium iron phosphate are extracted, transferred to the negative electrode through the electrolyte, and inserted into the negative electrode. Carbon material; simultaneously releases electrons from the positive electrode and reaches the negative electrode from the external circuit to maintain the balance of the chemical reaction. When the battery is discharging, lithium ions are extracted from the negative electrode and reach the positive electrode through the electrolyte. At the same time, the negative electrode releases electrons from the external circuit to the positive electrode to provide energy for the outside world.   

The low-temperature performance of lithium iron phosphate batteries is mainly affected by factors such as the production environment and materials. In the production process of lithium iron phosphate batteries, there are high requirements for different temperatures, humidity, dust, etc., which need to be strictly controlled. Due to the influence of materials, the lithium iron phosphate positive electrode itself has relatively poor electronic conductivity. It is more prone to polarization, which reduces the performance of the capacity. Moreover, the negative electrode is mainly charged at low temperatures because it will affect the electrolyte's safety problem. The viscosity may increase at low temperatures, and the lithium-ion migration resistance will increase; the binder has a relatively significant impact on the low-temperature performance of the battery.  

The low temperature performance of the lithium iron phosphate battery pack can be improved by adjusting the positive electrode, negative electrode, electrotype-hydraulic and binder.   

For the positive electrode, the particle size, resistance force, and the axis length of the AB plane will affect the low-temperature characteristics of the entire battery. Particle size shortens the migration path and improves the low-temperature discharge performance, because the lithium iron phosphate discharge is mainly It is related to the positive electrode.

For the negative electrode, the low-temperature charging of lithium batteries is mainly affected by the negative electrode, including the particle size and the change in the distance between the negative electrodes, and the granular graphite with a large layer spacing. In terms of impedance, the bulk impedance and ion migration resistance are relatively small.  

Electrolyte includes solvent, lithium salt and additives. The influence of solvent on the low temperature of lithium iron phosphate battery pack ranges from more than 70% to more than 90%. Solvent, lithium salt and additives have certain influence on the low temperature characteristics of power battery.  

For the adhesive, use linear adhesive.

In the entire system, from the improvement of the positive electrode, negative electrode, electrolyte to the binder, the lithium iron phosphate battery monomer will show better results.