Abstract:
The paper proposes an algorithm for selecting the optimal mass balance of lithium-ion battery electrodes when operating in the fast charge mode. The algorithm is based on the use of a numerical model describing the operation of batteries with electrodes based on porous materials filled with liquid electrolyte. The calculations used data on the characteristics of electrode materials, including the values of reversible and irreversible capacity determined at low currents. It is shown that this model describes well the behavior of batteries with an NCM cathode and a nanocarbon anode, even in a fast two-stage high-current charge mode. Using the developed model, it is possible to determine the optimal ratio of the anode and cathode masses to achieve the maximum value of the specific energy of the battery in any given operating mode, without conducting labor-intensive experiments.
Keywords:lithium-ion batteries, fast charging, amorphous nanostructured carbon, numerical modeling.
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