Nowadays, the industry trend of energy storage systems has a clear trend, one is the high voltage of the battery packs, and the other is the large capacity of the battery cells. Among them, large-capacity battery cells can greatly improve the energy density of energy storage systems, which is one of the important trends in system development and selection, and the most prominent one is the 280Ah LFP battery cell.

So, what are the advantages of 280Ah LFP battery cells in energy storage systems?

• Reducing the parallel number of battery cells, thereby reducing the use of components at the module and pack ends, has a natural cost advantage; in addition, it also has a higher volumetric energy density.
• The large capacity of 280Ah can support longer-duration energy storage systems.
• The reduction in the number of battery cells in the energy storage system makes BMS management easier, cell management and technology simpler, and integration costs lower.
• The use of large-capacity cells in the field of back-end integration has a high degree of simplification of the assembly process, which can greatly save the cost of land infrastructure and containers.

Of course, in addition to the advantages, there are also some disadvantages.

• The increase in the volume and capacity of the battery cell leads to the deterioration of the heat dissipation performance of the battery cell itself, and the difficulty of the consistency control of the energy storage system.
• The battery cell bulging problem is more obvious than in past models.
• The production efficiency of 280Ah cells is relatively low. The production line efficiency of top cell manufacturers is 6~11PPM, which is much lower than that of 50Ah and 100Ah cells.

In terms of production process, 280Ah battery cells mainly have two processes: electrode stacking and electrode winding.

The advantages of the electrode winding process lie in a high degree of automation and high production efficiency. The 280Ah cell produced by the electrode winding process has poor consistency, and the mechanical stress of the cell and the increase in thickness have problems such as C angle. The consistency test of 280Ah LFP battery cells can be done with a prismatic cell sorting machine.

The battery produced by the electrode stacking process has better product consistency and higher cycle life due to the larger electrode contact surface and no mechanical stress and C angle. The disadvantages of the battery stacking process mainly include electrode burr removal and low efficiency, and the yield rate is not as good as that of the winding process.

Partial List of 280Ah LFP Battery Cell Manufacturers

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