Structure principle and experimental study of energy storage station with soft carbon anode at megawatt level

At present, due to limited storage power stations at more than a megawatt, it is lack of operational data. As a core element, energy storage battery plays an important role in the development of energy storage power station. The negative electrode material has a great influence on the overall battery performance. The traditional LiFePO₄ battery uses graphite material as the negative electrode and has poor multiplying power performance and poor cycle performance. Because soft carbon is an excellent material, the battery in which the anode is made of soft carbon has excellent rate performance and large energy density. Compared with the traditional graphite anode material, soft carbon has better properties. In this paper, a set of megawatt-level energy station, the container type energy station, is studied. A novel structure of soft carbon anode lithium iron phosphate battery is developed as the energy battery. The 400KWh capacity charge and discharge experiments with low load power are carried out for the energy storage power station. The results show that the charging efficiency reaches 93% and the discharge efficiency reaches 97%. The experiments also verify the charge and discharge characteristics battery with soft carbon anode. The new structure of soft carbon material battery has good rate performance and the level of the platform is low and stable during charging and discharging. The experimental results are compared with the simulation results and they match very well. Results from this study are the valuable guide for the actual power station operation.