Why does lithium-ion battery performance decline in winter?
September 1, 2021
Why does lithium-ion battery performance decline in winter?
Factors restricting the low-temperature performance of lithium-ion batteries
In a low temperature environment, the viscosity of the electrolyte increases, and even partially solidifies, resulting in a decrease in the conductivity of the lithium-ion battery.
The compatibility between the electrolyte, the negative electrode and the separator becomes poor in a low temperature environment.
In the low temperature environment, the lithium ion battery's negative electrode is severely precipitated, and the precipitated metal lithium reacts with the electrolyte, and the product deposition causes the thickness of the solid electrolyte interface (SEI) to increase.
In the low temperature environment, the diffusion system of the lithium ion battery in the active material decreases, and the charge transfer resistance (Rct) increases significantly.