LR1130 battery

What factors affect the performance of LR1130 battery?

There are many factors that affect the capacity of lithium-ion batteries, such as operating temperature, charge and discharge current, charge and discharge cut-off voltage, etc., which will affect the decay rate of lithium-ion batteries. The mechanisms that cause the capacity decay of lithium-ion batteries can be divided into three categories: internal resistance and polarization increase, positive and negative electrode active material loss, and Li loss.

Different external factors have different effects on these three. For example, lithium-ion batteries made of LiFePO4 material have very good cycle performance, but different usage conditions have an important impact on the cycle life of lithium-ion batteries.

Experiments have shown that 15C pulse discharge and 15C continuous discharge of 26650 lithium-ion batteries have completely different effects on 26650 lithium-ion batteries. The capacity of 26650 lithium-ion batteries with 15C pulse discharge decays very quickly. After 40 times of charge and discharge, 15C discharge can no longer be performed, but 1C discharge can still be performed. The capacity of the 15C continuous discharge battery decays slowly, and 15C discharge can still be performed after 60 times, but the decay rate of the 1C rate is faster than that of the 15C pulse discharge.

Lithium-ion battery processing customization

The research on the influence of lithium-ion battery life decay on the charging strategy of lithium-ion batteries can better guide our design of lithium-ion batteries. The following different charging control strategies on the life decay of lithium-ion batteries are studied, and their use mechanisms are studied, and the life decay model of lithium-ion batteries is proposed.

The mechanism analysis concludes that the battery with 15C pulse discharge has more LiF in the SEI film of the negative electrode, and LiF has a greater barrier to the diffusion of lithium ions, which makes the Li+ diffusion impedance and charge exchange impedance of the battery increase rapidly, so that the polarization voltage of the battery is too large during the charging and discharging process, which leads to a rapid decrease in the large current discharge capacity of LiFePO4.

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