Liquid-state metal battery with inner heating device and preparation method thereof

Abstract

The invention belongs to the field of a liquid metal battery, and relates to a liquid-state metal battery with an inner heating device and a preparation method thereof. The liquid-state metal batterycomprises a conductive casing, an insulation casing, the inner heating device, a cathode current guide rod, a cathode, an anode and electrolyte, wherein the anode, the electrolyte and the cathode aresequentially laminated in the conductive casing from bottom to top; the cathode current guide rod is inserted into a battery cathode from the top of the conductive casing; the cathode current guide rod and the conductive casing are insulated; the insulation casing is arranged on the inner side wall of the conductive casing and is used for preventing the short circuit of the cathode, the electrolyte and the anode at the side surface by the conductive casing; the inner heating device is arranged in the electrolyte; the inner heating device comprises a plurality of resistance heating pipes in vertical arrangement, tight arrangement and mutual parallel connection. The liquid-state metal battery can realize inside heating; the battery inner resistance is regulated; the design of the heat insulation structure is facilitated.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage batteries, in particular to a liquid metal battery with an internal heating device and a preparation method thereof. Background technique [0002] It is generally believed that large-scale energy storage can effectively absorb renewable energy power generation, thereby improving the grid connection efficiency of wind power and solar power to a large extent. The research on all-liquid electrochemical cells began a century ago with the development of high-purity electrolytic aluminum. With the rapid development of renewable energy such as wind energy and solar energy, people urgently need low-cost, long-life, and large-scale energy storage. Therefore, a flow battery with three liquid layers that can be charged with a large current, that is, a liquid metal battery, is full of vitality. [0003] The first generation of all-liquid electrochemical cells originated from the hoopes electroly...

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Problems solved by technology

[0006] Chinese patent application CN 104112865B discloses 'a liquid metal battery device and its assembly method', the battery uses a porous metal cathode that prevents the battery from short-circuiting, but requires external heating to start the battery

[0007] Chinese patent application CN 104124459B discloses 'a square liquid metal battery device and its assembly method', which is used to solve the problem that the anode infiltrates upward along the battery shell to cause a short circuit

But the battery still needs external heating for the battery to start running

[0008] Although in the actual operation process, the above method has been able to successfully prepare liquid metal batteries, and is innovative in preventing short circuits, etc., but the above method requires high external heating for large-volume batteries, which will affect the insulation layer and battery structure accordingly. design, if internal heating can be used, it is expected to reduce the design difficulty of the insulation layer

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