Factors affecting lithium battery performance -Lithium - Ion Battery Equipment
There are many factors affecting the capacity of lithium -ion battery. For example, factors such as temperature, charging and discharge current, and charging and discharge interception voltage will affect the decline of lithium -ion batteries. The mechanism of lithium -ion battery capacity decline can be divided into three categories: internal resistance and polarization new, positive and negative polar activity loss, and li loss.
The influence of different external factors on these three is also different. For example, the lithium -ion battery of LIFEPO4 has a very good circulation performance, but different use conditions have an important impact on the cycle life of the lithium -ion battery.
The test proves that the 15C pulse power distribution and 15C continuous discharge of the 26650 lithium -ion battery have a completely different impact on the 26650 lithium -ion battery. The capacity of the 26650 lithium -ion battery of the 15C pulse power is very fast. After 40 times the charging and discharge cannot be performed, 15C discharge can be performed, but 1C can still be performed. The capacity of 15C continues to discharge battery is relatively slow, and 15C discharge can still be performed after 60 times, but the decrease rate of the 1C magnification is faster than 15C pulse discharge.(Lithium - Ion Battery Equipment)
The research on the impact of lithium -ion battery life decline in the charging strategy of lithium ion batteries can better guide our design of lithium ion batteries. The following different charging control strategies have the effect of decline in lithium -ion battery life, and their use mechanisms have been studied, and the life decline model of lithium ion batteries is proposed.
The mechanism analysis concludes that the battery of 15C pulse power places appears more LIF in the negative SEI film, and the obstacles of lif's obstacles to lithium ion diffusion are even greater, making the battery's LI+diffusion impedance and charge exchange impedance rapidly increased, so that it makes it makes it makes it makes it makes it makes it makes it makes it makes the impedance of the battery. During the charging and discharge process, the polarization voltage is too large, resulting in the rapid decline in Lifepo4 large current discharge capacity.
The influence of different external factors on these three is also different. For example, the lithium -ion battery of LIFEPO4 has a very good circulation performance, but different use conditions have an important impact on the cycle life of the lithium -ion battery.
The test proves that the 15C pulse power distribution and 15C continuous discharge of the 26650 lithium -ion battery have a completely different impact on the 26650 lithium -ion battery. The capacity of the 26650 lithium -ion battery of the 15C pulse power is very fast. After 40 times the charging and discharge cannot be performed, 15C discharge can be performed, but 1C can still be performed. The capacity of 15C continues to discharge battery is relatively slow, and 15C discharge can still be performed after 60 times, but the decrease rate of the 1C magnification is faster than 15C pulse discharge.(Lithium - Ion Battery Equipment)
The research on the impact of lithium -ion battery life decline in the charging strategy of lithium ion batteries can better guide our design of lithium ion batteries. The following different charging control strategies have the effect of decline in lithium -ion battery life, and their use mechanisms have been studied, and the life decline model of lithium ion batteries is proposed.
The mechanism analysis concludes that the battery of 15C pulse power places appears more LIF in the negative SEI film, and the obstacles of lif's obstacles to lithium ion diffusion are even greater, making the battery's LI+diffusion impedance and charge exchange impedance rapidly increased, so that it makes it makes it makes it makes it makes it makes it makes it makes it makes the impedance of the battery. During the charging and discharge process, the polarization voltage is too large, resulting in the rapid decline in Lifepo4 large current discharge capacity.
