The application is suitable for the cross technical field of
electrochemical energy storage and electromagnetic fluid
mechanics, and discloses a method,
system, device and medium for strengthening
mass transfer of
liquid metal batteries based on an external
magnetic field of a permanent
magnet, the method comprising: constructing a model of a
liquid metal battery and externally arranging a permanent
magnet on the model; obtaining a
discharge current by discharging the
liquid metal battery, and interacting the
discharge current with an external
magnetic field generated by the permanent
magnet in a positive
electrode region to obtain a
Lorentz force in an azimuthal direction; generating
Joule heat through the
discharge current, performing iterative calculation of a fluid
heat transfer physical field to obtain a converged temperature distribution, forming thermal-driven flow, and
coupling vortex flow driven by the
Lorentz force to calculate a flow velocity containing a rotating vortex flow characteristic; and based on the converged flow velocity, using a rare substance transfer
physical field to strengthen the
mass transfer process in the positive
electrode region. The application effectively relieves the accumulation of negative
electrode metal ions at the interface by externally arranging the permanent magnet, and improves the discharge performance of the battery.