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A liquid metal battery with internal heating device and preparation method thereof

A liquid metal battery and internal heating technology, which is applied to secondary batteries, circuits, electrical components, etc., can solve problems such as short circuit, reduce the difficulty of insulation layer design, and affect the design of insulation layer and battery structure, so as to improve heating efficiency and reduce The effect of design difficulty

Active Publication Date: 2020-10-16
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • A liquid metal battery with internal heating device and preparation method thereof
  • A liquid metal battery with internal heating device and preparation method thereof
  • A liquid metal battery with internal heating device and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0074] A preparation method of a liquid metal battery and an internal heating device thereof of the present invention, comprising:

[0075] 1) Prepare the conductive shell: prepare the conductive shell 1 with 304 stainless steel;

[0076] 2) Preparing an insulating case: using boron nitride to prepare an insulating case 2 on the inner wall of the conductive case 1;

[0077] 3) Preparation of internal heating device: use boron nitride-coated nickel-chromium alloy resistors to make circular tubular resistance heating tubes 8 with different inner diameters and different resistance values ​​(3mm / 8Ω, 5mm / 5Ω, 9mm / 3Ω), and the smaller the inner diameter, the smaller the resistance value bigger. The resistance heating tubes 8 with different inner diameters are closely arranged in a radially increasing manner from the center to the edge, as shown in Figure 2a and Figure 2b shown. Different resistance heating tubes 8 are connected in parallel current mode.

[0078] 4) Put the ano...

Embodiment 2

[0081] A preparation method of a liquid metal battery and an internal heating device thereof of the present invention, comprising:

[0082] 1) Prepare the conductive shell: prepare the conductive shell 1 with 304 stainless steel;

[0083] 2) Prepare the insulating shell: use aluminum oxide to insulate the shell 2 on the inner side wall of the conductive shell 1;

[0084] 3) Preparation of internal heating device: 4J29 low-expansion alloy square tube coated with ceramics is prepared by enamel process as an alloy resistor, and the side length and resistance value of the square tube are (2mm / 7Ω, 3mm / 5Ω, 4mm / 1.5Ω) , the smaller the side length, the larger the resistance value. The resistance heating tubes with different side lengths are closely arranged in a way that gradually increases radially from the center to the edge, such as image 3 shown. Different resistance heating tubes are connected in parallel current mode.

[0085] 4) Put the anode 6, the electrolyte 7, the inte...

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Abstract

The invention belongs to the field of liquid metal batteries, and relates to a liquid metal battery with an internal heating device and a preparation method thereof. The liquid metal battery includes a conductive casing, an insulating casing, an internal heating device, a cathode current guide rod, a cathode, an anode and an electrolyte, and the anode, electrolyte and cathode are stacked in the conductive casing from bottom to top, and the cathode current guide rod is formed by The top of the conductive casing is inserted into the battery cathode, and the cathode current guide rod is insulated from the conductive casing; the insulating casing is arranged on the inner side wall of the conductive casing to prevent the cathode, electrolyte and anode from being electrically conductive at the side The casing is short-circuited; the internal heating device is arranged in the electrolyte; the internal heating device includes a plurality of resistance heating tubes arranged vertically, closely arranged and connected in parallel. The liquid metal battery of the present invention can be heated internally to adjust the internal resistance of the battery, which is beneficial to the design of the heat preservation structure.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/38H01M10/615H01M10/654H01M10/6571
CPCH01M10/38H01M10/615H01M10/654H01M10/6571Y02E60/10Y02P70/50
Inventor 杜兆富张洪平罗志强祁焱赵栋梁
Owner CENT IRON & STEEL RES INST