What are the basic factors that affect the storage performance of lithium-ion battery packs?

Lithium-ion battery layout is composed of positive electrode, negative electrode, electrolyte, barrier and shell. (1) The negative electrode does not form a reverse capacity. The important thing is that with the delay of storage time, the lithium embedded in the graphite layer of the negative electrode loses its activity, resulting in dead lithium, which cannot be discharged back to the positive electrode. The formation of these dead lithium affects the capacity change. The impact is negative, so with the increase of SOC, the more capacity will be lost due to this reason; (2) According to Ohm's law: Uu003dUR+Uru003dI(R+r), where: U is the electromotive force of the battery ; UR is the voltage of the circuit terminal; Ur is the internal conflict voltage of the battery; R is the resistance of the external circuit; r is the internal resistance of the battery; I is the discharge current. Due to the increase in internal resistance during the abandonment process; the increase in the terminal voltage decreases, the terminal voltage is reached earlier during discharge, and the discharge time is reduced compared to the initial storage period, so that the discharge capacity is reduced. This effect is also negative; ( 3) As the storage time of the positive lithium iron phosphate battery pack is delayed, the secondary particle particles crack and form a fresh interface, which has the activity of de-intercalating lithium ions from the beginning. This effect is positive, so the capacity increase may appear At the beginning of storage at the moment. After testing 48V lithium-ion battery packs under different temperatures and different SOCs, the battery performance changes such as exchange internal resistance, capacity, DC internal resistance, power capacity, etc., are invented to change the discipline of various functions in the process of battery abandonment. The difference is that in the actual storage of the battery, the storage conditions should be selected according to the right and wrong of the storage time and the usage bias of the battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it.