Construction method of liquid metal battery simulation model

Abstract

The invention discloses a construction method of a liquid metal battery simulation model. Simulation conditions of the liquid metal battery simulation model are as follows: the liquid metal battery simulation model comprises an electrochemical and material transfer physical field, a fluid mechanics physical field, a fluid heat transfer physical field and an electromagnetic field; and the liquid metal battery simulation model is constructed for representing the discharge process of a liquid metal battery. According to the method, the accurate and comprehensive liquid metal battery model is constructed by coupling electrochemistry, material transfer, hydromechanics and fluid heat transfer physical fields and electromagnetic fields and the like for the first time, and internal physical and chemical changes of the liquid metal battery during working are simulated and reproduced through simulation calculation, so that the difficulty that in-situ monitoring cannot be carried out is overcometo a certain extent, the discharge process of the liquid metal battery can be deeply understood, a certain theoretical guidance can be provided for experimental improvement, the blindness of an experiment is avoided, and the experimental period is shortened.

Description

technical field [0001] The invention belongs to the field of energy storage batteries, and more specifically relates to a method for constructing a simulation model of a liquid metal battery. Background technique [0002] With the development of the global economy and the advancement of scientific and technological civilization, people's demand for energy is becoming increasingly urgent. At the same time, energy and environmental crises have become problems that society needs to solve urgently. Traditional fossil energy, such as coal, oil and natural gas, will seriously pollute the environment in the process of use, and with the continuous consumption of energy, these natural fossil energy will gradually dry up, so the development and effective use of renewable new energy has become become the focus of social attention. The renewable energy that has been developed and utilized at this stage includes solar energy, wind energy, water energy, etc. These energy sources are low-...

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Problems solved by technology

However, the liquid metal battery operates in a closed inert space at a higher temperature. According to the existing technology and experimental platform, it is difficult to study the physical and chemical behavior inside the battery through in-situ detection. Therefore, the multi-field based finite element numerical simulation Coupling simulation is of great significance for us to understand and study the charging and discharging behavior of batteries

In addition, in the later stage of discharge of liquid metal batteries, a solid phase alloy with a high melting point will appear at the interface between the positive electrode and the molten salt, causing the interface to lose fluidity, and experiments have found that the interface between the positive electrode and the molten salt often appears upward "bulge" or uneven. ; It was further found that the larger the battery capacity, the more obvious the interface instability, which is most likely caused by the poor interface wettability and the "bump" distribution of the deposition current at the interface

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