چكيده به لاتين
Many factors affect the performance of battery-based systems (such as satellites and electric cars). The most important of these are the unbalance of the battery cells due to repeated charging and discharging, the ambient temperature of the battery and the process of making the batteries. As the battery cells become unbalanced, there are different potential differences between these cells, which decrease the capacity of the battery and its useful life, and even in cases of battery destruction and explosion, therefore, cell balance plays an important role in increasing the battery life. Various methods have been proposed to balance the battery cells. This thesis presents a new orbital configuration for the lithium-ion battery balanced circuit.
The circuit provided by the class of non-active (active) balancers is based on the transfer of energy from the battery pack to the weak cell. The proposed structure employs a forward-flow hybrid converter that, during a complete switching period, first performs the forward-flow converter and then the fly-back converter, which performs the energy transfer process from cell to cell poorly, thus speeding up the proposed scheme from conventional cell-to-cell and even cellular structures. Some cell structures are more dependent on the cell where the balancing process is performed only in one half-switching period, as well as other important features of the proposed circuit, the automatic balancing process (which removes the controller in this scheme from the basic structures), modularity, and implementation Comfortable A. It is not. These features have made this design applicable to important industrial applications such as satellites, electric cars (hybrids) and, in general, high power consumption (over kW), which is of particular importance for active or non-coal balancing processes.
The proposed circuit is simulated in Orcad Capture software with 81% efficiency and 1.5 milliseconds equilibrium in the 0.5 V voltage difference between weak and strong cells (which is a very bad condition for cells). In this project, for simplicity of analysis, the simplest orbital model (single resistor and capacitive model) for lithium-ion batteries is used in the simulation.
Keywords: Cell Balancing, Lithium-Ion Battery, Battery Shortening, Satellites, Electric Vehicles, Auto Balancing.
