Calculation formula for lithium iron phosphate energy storage capacity

What is lithium iron phosphate battery?

Finally, Section 6 draws the conclusion. Lithium iron phosphate battery is a lithium iron secondary battery with lithium iron phosphate as the positive electrode material. It is usually called “rocking chair battery” for its reversible lithium insertion and de-insertion properties.

Why does a lithium phosphate battery have a limited service life?

A battery has a limited service life. Because of the continuous charge and discharge during the battery’s life cycle, the lithium iron loss and active material attenuation in the lithium iron phosphate battery could cause irreversible capacity loss which directly affects the battery’s service life.

What is the nominal capacity of lithium iron phosphate batteries?

The data is collected from experiments on domestic lithium iron phosphate batteries with a nominal capacity of 40 AH and a nominal voltage of 3.2 V. The parameters related to the model are identified in combination with the previous sections and the modeling is performed in Matlab/Simulink to compare the output changes between 500 and 1000 circles.

What are the coefficients of a lithium battery?

Among them, the coefficients K represent the thermal conductivity of the lithium battery in the length, width and height directions, T is the temperature, q is the heat generation rate per unit volume of the battery, ρ represents the battery density, c p is the battery specific heat capacity, and t is the time.

Where are lithium battery energy storage demonstration projects conducted in China?

Multiple lithium battery energy storage demonstration projects have been conducted throughout China, including Zhangbei County in Zhangjiakou of Hebei Province (14 MW/63WMh lithium phosphate battery system), Baoqing energy storage station in Shenzhen (4 MW/16MWh lithium iron phosphate battery system) etc.

Which RC model is most suitable for lithium iron phosphate (LiFePO4) battery?

(2) The first-order RC model with one-state hysteresis which has been demonstrated most suitable for lithium iron phosphate (LiFePO4) battery is used to establish the battery model. (3) The dual AEKF is employed to estimate the model parameters and SOC.