Testing system and method for applying external magnetic field to liquid metal battery

Abstract

The invention relates to a test system and method for applying an external magnetic field to a liquid metal battery. The test system comprises a magnetically soft alloy magnetic core, a solenoid, a magnetic field control system, a liquid metal battery test device and a heating device, the soft magnetic alloy magnetic core is arranged in the solenoid and used for improving the induction magnetic field intensity of the solenoid. The pair of solenoids are respectively arranged on the left and right sides or above and below the liquid metal battery and are used for providing a horizontal induced magnetic field or a vertical induced magnetic field; the magnetic field control system is connected with the solenoid and adjusts the induced magnetic field intensity by adjusting the current of the solenoid; the liquid metal battery testing device is used for testing electrochemical parameters of the liquid metal battery; the heating device comprises a resistance wire, a heat conduction container and a heating console; the heat conduction container is used for accommodating the liquid metal battery and uniformly conducting heat to the liquid metal battery; the resistance wire is arranged on the outer side of the heat conduction container; the heating temperature of the resistance wire is controlled through the heating console.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and in particular relates to a test system and method for applying an external magnetic field to a liquid metal battery. Background technique [0002] With the rapid development of renewable energy such as wind energy and solar energy, the disadvantages of fluctuation and intermittent power generation are becoming more and more obvious. The instability of renewable energy will have an impact on the power grid, and the inability to connect to the grid will lead to the phenomenon of abandoning wind and solar energy. ubiquitous. In order to reduce the impact of renewable energy on the power grid, reduce energy waste, and realize peak-shaving and valley-filling of electric energy, people urgently need low-cost, long-life, and large-scale energy storage to meet the needs of grid-connected renewable energy. Among many electrochemical energy storage batteries, all-liquid electrochemical ba...

AI Technical Summary

Problems solved by technology

At present, the devices for high-temperature and magnetic field testing of magnetic samples (other than liquid metal batteries) mostly use charged coils, such as vibrating sample magnetometers and physical property measurement systems. The maximum test temperature is about 300 ° C, which can be measured The size of the sample is a few millimeters; such as the BH tester, it can be tested with an additional heating device, but the heating temperature is usually not higher than 200°C, the test sample is a ring sample, and these magnetic measurement systems cannot be applied to liquid metal batteries

[0005] The simplest way to add an external magnetic field to a large-scale high-temperature test system is to use a permanent magnet magnetic field to directly apply an external magnetic field. However, there are many disadvantages in using permanent magnets for external magnetic field research, such as difficult to accurately control the size of the magnetic field, poor magnetic field stability, The operating temperature of the battery may exceed the Curie temperature of the permanent magnet, and the time for applying the magnetic field cannot be selected, etc.

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