Factors affecting the low temperature characteristics of 18650 battery 3500mah lithium

　　Although 18650 battery 3500mah lithium have great advantages in terms of cycle life and battery multiple compared with other batteries, their performance is slightly reduced under low temperature conditions. Therefore, improving and improving the low-temperature characteristics of 18650 battery 3500mah lithium can more effectively improve their competitiveness.

　　First, the cathode material selected in the lithium iron phosphate battery has weak electronic conductivity and is prone to polarization, thus reducing the volume of the lithium battery.

　　Second, the negative level of negative-level lithium batteries has a great impact on low-temperature battery charging and will affect the safety of rechargeable batteries.

　　Third, the viscosity of the lithium battery electrolyte in 18650 battery 3500mah lithium increases at low temperatures, thereby increasing the transfer resistance of the lithium ion battery.

　　Ways to improve and improve the low-temperature characteristics of 18650 battery 3500mah lithium

　　1. The three factors of positive electrode particle size, resistance and resistance, from the perspective of the positive level of lithium iron phosphate rechargeable batteries, will affect the ultra-low temperature characteristics of rechargeable batteries. The low-temperature charge and discharge characteristics of lithium batteries can be improved through the positive production process. Increasing the length of the plane axis can enlarge the transfer channel of the lithium-ion battery and help increase the capacity of the battery. According to research, the low-temperature charge and discharge characteristics of 18650 battery 3500mah lithium can release 914 particles at minus 20°C. The particle size is 100-200nm. The nanotechnology of particles can reduce the transfer path of particles, thereby improving its low-temperature charge and discharge. characteristic.

　　2. Negative electrode For 18650 battery 3500mah lithium charged by low-temperature batteries, the negative electrode is more harmful. The key lies in the change of negative electrode particle size and negative stage interval. Human-made high-purity graphite is a battery cathode material with different layer spacing and particle size. The particle high-purity graphite layer with a large layer spacing has slightly smaller intrinsic impedance and positive ion transfer impedance from the perspective of antigen. Because the distance between the synthetic high-purity graphite layers is enlarged and the particle size is reduced, low-temperature constant current battery charging has a great improvement on 18650 battery 3500mah lithium.

　　3. When the temperature of lithium battery electrolyte drops to minus 20°C or lower, the electrolyte of lithium iron phosphate battery is prone to problems such as freezing, increased viscosity, and deterioration of properties. Experiments show that the harm of organic solvents to the low temperature of rechargeable batteries ranges from 70% to 90%, reaching more than a dozen points. In addition, different lithium salts also have certain effects on battery charging performance. Experiments have found that if only the preservatives are changed, low-temperature preservatives can increase the charge and discharge capacity of rechargeable batteries from 8% to 90%.

　　The above exemplifies several methods and key points to improve and enhance the low-temperature characteristics of 18650 battery 3500mah lithium, mainly based on the internal material composition of the battery. In fact, in order to improve the performance of 18650 battery 3500mah lithium at lower temperatures quickly and faster, not only the internal constituent materials of the battery must be improved, but also through various methods, such as battery intelligent management system, overall cycle system, etc., to improve its efficiency.

Read recommendations:

6F22

Principles of polymer lithium ion battery work.button cell battery cr1620

Main characteristics of lithium batteries

803040 polymer battery company

CR2025 battery