A liquid metal battery for industrial applications and its application method

Abstract

The present invention discloses a liquid metal battery for industrial application and its application method. The battery structure includes a housing provided with a corrosion-resistant inner lining. Above the corrosion-resistant inner lining at the bottom inside the housing, there are arranged a lower battery anode graphite block, a lower battery anode mother liquid layer, a lower battery liquid electrolyte layer, a lower battery metallic lithium, and an isolation graphite plate. Above the isolation graphite plate, there are successively arranged an upper battery anode mother liquid layer, an upper battery liquid electrolyte layer, an upper battery metallic lithium, and an upper battery cathode graphite block. The lower battery anode steel bar and the upper battery cathode steel bar at one end are respectively electrically connected to a power source, and the lower battery anode steel bar and the upper battery cathode steel bar at the other end are respectively electrically connected to a DC / AC inverter, a booster, and a load. The above-mentioned liquid metal battery for industrial application of the present invention, combined with its application method, can resist high-temperature corrosion, has a tight seal, has good heat preservation, does not require external heating, and has a high energy storage efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid metal batteries, and particularly to a liquid metal battery for industrial application and its application method. Background Art

[0002] Liquid metal batteries are a new type of electrochemical energy storage technology that has emerged and developed in recent years and have broad application prospects in the field of large-scale energy storage. The concept model of liquid metal batteries can be traced back to the three-layer liquid Hoopes aluminum electrolytic cell proposed by the Aluminum Company of America in the early 20th century. The new electrolytic refining method invented by Hoopes is named because there are three layers of liquid in its electrolytic cell. The three layers of liquid are: the upper layer is the low-density high-purity liquid aluminum cathode obtained by refining, the lower layer is the high-density copper-aluminum alloy anode, and the middle layer is the molten salt electrolyte. In the 1960s and 1970s, research topics such as "thermal regenerative bimetallic batteries" were repeatedly discussed and studied by General Motors Corporation of the United States, Argonne National Laboratory of the United States, etc. General Motors Corporation of the United States first proposed the Na-Sn bimetallic battery. This battery can be continuously charged and discharged for more than 30 days at a working temperature of 700 °C, and the battery density can reach up to 0.7 A / cm 2 , and the battery efficiency exceeds 95%, and the voltage remains at 0.35 - 0.45 V.

[0003] In 2006, Professor Sadoway and his team at the Massachusetts Institute of Technology (MIT) in the United States first proposed liquid metal batteries. Based on the high-temperature preparation of metallic aluminum in the metallurgical industry, Professor Sadoway proposed the concept of high-temperature liquid metal batteries. The characteristics of high-temperature liquid metal batteries are similar to those of sodium-sulfur batteries, both having high energy efficiency, long battery life, up to more than ten years at most, and very simple battery structure, low cost, high Coulomb efficiency, and battery stability. After being proposed by Professor Sadoway, this type of battery has attracted the attention of global energy storage research. However, liquid metal batteries have not been mass-produced and applied for a long time after the concept was proposed, mainly because the temperature of liquid metal batteries is too high. Currently, the working temperature of mainstream liquid metal batteries is mostly around 400 °C, which poses a serious potential safety hazard for the batteries. Professor Sadoway and his team have successively studied battery systems such as Na-Bi, Ca-based, Mg-based, Li-based, etc. Among them, the Li-Bi system exhibits excellent Coulomb efficiency and discharge performance.

[0004] The liquid metal battery is composed of three layers of liquid substances. Due to immiscibility and different densities, the active components are automatically divided into three layers, namely the low-density negative electrode A at the uppermost layer, the high-density positive electrode B at the lowermost layer, and the molten inorganic salt electrolyte in the middle layer that separates the positive and negative electrodes and acts as a diaphragm. During discharge, the negative electrode metal material undergoes an oxidation reaction, migrates to the positive electrode in the form of ions through the molten inorganic salt electrolyte in the middle layer, and the negative electrode metal ions undergo a reduction reaction on the positive electrode to form an alloy, reducing the thickness of the negative electrode liquid layer and increasing the thickness of the positive electrode liquid layer. The reaction process during charging of the liquid metal battery is exactly the opposite of the above process.

[0005] The specific electrochemical reaction equations of the electrodes and the overall reaction formula of the battery are as follows:

[0006] Negative electrode reaction: A - ne - → A n+

[0007] Positive electrode reaction: A n+ + ne - + B → AB

[0008] Overall reaction process: A + B → AB

[0009] Existing liquid metal batteries have high operating temperatures and all use vertical electrodes directly inserted into the liquid metal and are sealed by means of a sealing ring. Therefore, the electrodes are severely corroded, and the sealing ring is not resistant to high-temperature corrosion, often experiencing an open-ring phenomenon. The electrode life is short, seriously affecting the normal operation of the battery. Due to poor heat preservation, the battery pack needs to be sealed in a heat preservation box and externally heated, which affects the industrial promotion and application of liquid metal batteries. Summary of the Invention

[0010] The purpose of the present invention is to provide a liquid metal battery for industrial application and its application method to solve the problems existing in the above prior art, being resistant to high-temperature corrosion, having a tight seal, good heat preservation, not requiring external heating, and having high energy storage efficiency.

[0011] To achieve the above purpose, the present invention provides the following solutions:

[0012] The present invention provides a liquid metal battery for industrial application, including a housing. An anticorrosive lining is fixedly connected to the inner wall of the housing. Above the anticorrosive lining at the bottom inside the housing, a plurality of lower battery anode graphite blocks are laid. Lower battery anode steel bars are respectively inserted at both ends of the lower battery anode graphite blocks. Above the lower battery anode graphite blocks, a lower battery anode mother liquid layer, a lower battery liquid electrolyte layer and lower battery metallic lithium are sequentially arranged. An isolation graphite plate is fixedly arranged above the lower battery metallic lithium. Above the isolation graphite plate, an upper battery anode mother liquid layer, an upper battery liquid electrolyte layer and upper battery metallic lithium are sequentially arranged. Above the upper battery metallic lithium, a plurality of upper battery cathode graphite blocks are evenly laid. Upper battery cathode steel bars are respectively inserted at both ends of the upper battery cathode graphite blocks. Above the upper battery cathode graphite blocks, an upper anti-seepage material layer and an upper battery alumina fiber heat preservation board are sequentially arranged. The lower battery anode steel bar and the upper battery cathode steel bar at one end of the lower battery anode graphite block and the upper battery cathode graphite block are respectively electrically connected to a power source. The lower battery anode steel bar and the upper battery cathode steel bar at the other end of the lower battery anode graphite block and the upper battery cathode graphite block are respectively electrically connected to a DC / AC inverter. The DC / AC inverter is connected to a load through a booster.

[0013] Optionally, the anticorrosive lining includes an alumina fiber board fixedly connected to the inner wall of the housing. Inside the alumina fiber board, a clay heat preservation brick, a side anti-seepage material layer and a magnesia brick lining are sequentially arranged. The lower battery anode graphite blocks are fixedly laid on the magnesia brick lining at the bottom inside the housing.

[0014] Optionally, a lower battery feeding port isolation wall and an upper battery feeding port isolation wall are respectively arranged on both sides inside the housing. The bottom of the lower battery feeding port isolation wall contacts the upper end surface of the lower battery anode mother liquid layer. The top of the lower battery feeding port isolation wall is fixedly connected to one end of the upper battery alumina fiber heat preservation board. A lower battery feeding port is formed between one side of the lower battery feeding port isolation wall and the adjacent magnesia brick lining. A lower battery feeding port cover is fixedly arranged at the top of the lower battery feeding port. The bottom of the upper battery feeding port isolation wall contacts the upper end surface of the upper battery anode mother liquid layer. The top of the upper battery feeding port isolation wall is fixedly connected to the other end of the upper battery alumina fiber heat preservation board. An upper battery feeding port is formed between one side of the upper battery feeding port isolation wall and the adjacent magnesia brick lining. An upper battery feeding port cover is fixedly arranged at the top of the upper battery feeding port.

[0015] Optionally, the upper battery cathode steel rod sequentially penetrates through the housing, the heat insulation layer and the electrolytic cell lining, and is inserted into the upper battery cathode graphite block. The lower battery anode steel rod sequentially penetrates through the housing, the heat insulation layer and the electrolytic cell lining, and is inserted into the lower battery anode graphite block. Steel-aluminum explosion blocks are fixedly arranged at the outer ends of the lower battery anode steel rod and the upper battery cathode steel rod respectively. The lower battery anode steel rods at one end of the lower battery anode graphite block are respectively connected with aluminum soft belts through the steel-aluminum explosion blocks in one-to-one correspondence. The aluminum soft belts are connected with the anode of the power supply through an aluminum bus bar. The lower battery anode steel rods at the other end of the lower battery anode graphite block are respectively connected with aluminum soft belts through the steel-aluminum explosion blocks in one-to-one correspondence. The aluminum soft belts are connected with the anode interface of the DC / AC inverter through another aluminum bus bar. The upper battery cathode steel rods at one end of the upper battery cathode graphite block are respectively connected with aluminum soft belts through the steel-aluminum explosion blocks in one-to-one correspondence. The aluminum soft belts are connected with the cathode of the power supply through an aluminum bus bar. The upper battery cathode steel rods at the other end of the upper battery cathode graphite block are respectively connected with aluminum soft belts through the steel-aluminum explosion blocks in one-to-one correspondence. The aluminum soft belts are connected with the cathode interface of the DC / AC inverter through another aluminum bus bar.

[0016] The present invention also provides a method for applying a liquid metal battery in industrial applications, including the following steps:

[0017] S1: Inject the lower battery anode mother liquid until the thickness of the lower battery anode mother liquid reaches 35 - 40 cm;

[0018] S2: Inject the lower battery liquid electrolyte to the lower surface of the isolation graphite plate;

[0019] S3: Inject the upper battery anode mother liquid until the thickness of the upper battery anode mother liquid reaches 35 - 40 cm;

[0020] S4: Inject the upper battery liquid electrolyte until the upper battery liquid electrolyte contacts the upper battery cathode graphite block. The anode mother liquid is a Li-Bi-Sn alloy liquid, in which the molar ratio of bismuth-tin alloy at the eutectic point of 139 °C is 57:43, and the density is 8.4 - 8.7 g / cm 3 ; LiI-KI is used as the battery electrolyte, the liquid electrolyte ratio is 58:42, the eutectic temperature is 260 °C, and the density is 2.71 - 2.76 g / cm 3 ; the operating temperature is 280 - 300 °C, and the density of metallic lithium is 0.543 g / cm 3 ;

[0021] S5: Connect the power supply to start charging;

[0022] S6: As the power supply is connected for charging, metallic lithium in the upper battery and metallic lithium in the lower battery precipitate and float to the surface of their respective adjacent liquid electrolytes until the thicknesses of metallic lithium in the upper battery and metallic lithium in the lower battery reach 15 - 25 cm respectively;

[0023] S7: The power supply is disconnected, the battery starts to discharge, and metallic lithium gradually turns into lithium ions and enters the underlying alloy. The inverter converts direct current into alternating current and then boosts the voltage for the load to use.

[0024] The present invention has achieved the following technical effects compared with the prior art:

[0025] The present invention uses corrosion-resistant magnesia bricks as the inner lining to contact the electrolyte and the anode master alloy, and the electrode material is made of graphite material, thus properly solving the problem of high-temperature corrosion. The sealing process is good, and the upper and lower batteries are fully sealed with heat-insulating materials, refractory materials, and anti-seepage materials, thus solving the sealing problem of the liquid metal battery. The heat loss is small. Since the problems of full sealing and electrode corrosion resistance are solved, although the working environment of the liquid metal battery requires high temperature, the heat source is stable during operation, and the heat inside the battery is evenly and stably maintained, reducing the heat loss. Due to the adoption of the double-layer battery structure, the charging voltage is reduced by about 40%, and the energy storage efficiency is increased by 45%, which is suitable for industrial application. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 Schematic diagram of the internal structure of the liquid metal battery for industrial application of the present invention;

[0028] Figure 2 Top view schematic diagram of the liquid metal battery for industrial application of the present invention;

[0029] Description of the reference numerals: 1. Isolation wall of the lower battery feeding port; 2. Lower battery feeding port; 3. Magnesia brick inner lining; 4. Side anti-seepage material layer; 5. Clay heat-insulating brick; 6. Alumina fiber board; 7. Cover of the lower battery feeding port; 8. Cathode steel bar of the upper battery; 9. Cathode graphite block of the upper battery; 10. Alumina fiber heat-insulating board of the upper battery; 11. Upper anti-seepage material layer; 12. Cover of the upper battery feeding port; 13. Upper battery feeding port; 14. Isolation wall of the upper battery feeding port; 15. Metallic lithium of the upper battery; 16. Liquid electrolyte layer of the upper battery; 17. Anode mother liquid layer of the upper battery; 18. Isolation graphite board; 19. Metallic lithium of the lower battery; 20. Liquid electrolyte layer of the lower battery; 21. Anode mother liquid layer of the lower battery; 22. Anode graphite block of the lower battery; 23. Anode steel bar of the lower battery; 24. Shell; 25. Steel-aluminum explosion block; 26. Aluminum soft strip; 27. Aluminum busbar; 28. DC / AC inverter; 29. Voltage booster; 30. Load; 31. Power supply. Detailed implementation mode

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] The object of the present invention is to provide a liquid metal battery for industrial application and its application method to solve the problems existing in the above-mentioned prior art, which is resistant to high-temperature corrosion, has a tight seal, good heat preservation, does not require external heating, and has high energy storage efficiency.

[0032] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation modes.

[0033] Embodiment 1

[0034] As Figure 1 and Figure 2 shown, the present invention provides a liquid metal battery for industrial application, including a housing 24. The housing 24 is welded by a steel shell with a thickness of 1-2 cm. The inner lining of the housing 24 is sequentially laid with an alumina fiber board 6, a clay insulation brick 5, a side anti-seepage material layer 4, and a magnesia brick inner lining 3. The side anti-seepage material layer 4 uses alumina fine-grained anti-seepage material. An isolation graphite plate 18 is installed in the battery inner lining. The isolation graphite plate 18 is made of a graphite plate with a thickness of 10-15 cm. The isolation graphite plate is composed of several pieces of graphite embedded through specific grooves, and a binder is applied at the joints and sintered at high temperature. It is both the cathode of the lower battery and the anode of the upper battery;

[0035] The isolation graphite plate 18 divides the liquid metal battery into an upper battery and a lower electrolytic cell. The upper cover of the upper battery is an upper battery graphite cathode block 9. The upper battery graphite cathode block 9 is spliced by graphite blocks with a thickness of 20-25 cm. The gaps between the graphite blocks are filled with cold ramming paste, and the cold ramming paste is baked at 180-200 °C. Holes are drilled at both ends of each upper battery cathode graphite block 9 to embed upper battery cathode steel bars 8. Steel-aluminum explosion blocks 25 are welded on the steel bars. One end of the steel-aluminum explosion block 25 is welded to one end of an aluminum soft strip 26, and the other end of the aluminum soft strip 26 is welded to an aluminum busbar 27. The aluminum busbar 27 is connected to a power supply 31, and the power supply 31 is a regenerative power supply or a grid DC power supply;

[0036] The lower battery anode graphite block 22 is laid at the bottom of the lower battery. The lower battery graphite anode block 22 is composed of graphite blocks with a thickness of 20 - 25 cm spliced together. The gap between the graphite blocks is filled with cold ramming paste, and the cold ramming paste is calcined at 180 - 200 °C. At both ends of each lower battery anode graphite block 22, holes are drilled to embed the lower battery anode steel bar 23. A steel-aluminum explosion block 25 is welded on the steel bar. One end of the explosion block is welded to the aluminum soft strip 26 by welding, and the other end of the aluminum soft strip 26 is welded to the aluminum busbar 27, and the aluminum busbar 27 is connected to the power supply 31;

[0037] On both sides inside the housing 24, there are respectively arranged a lower battery feeding port isolation wall 1 and an upper battery feeding port isolation wall 14. The gaps between them and the corrosion-resistant linings on both sides of the housing 1 form a lower battery feeding port 2 and an upper battery feeding port 13. A lower battery feeding port cover 7 is installed on the lower battery feeding port 2, and the lower battery feeding port 2 is communicated with the bottom of the lower battery. An upper battery feeding port cover 12 is installed on the upper battery feeding port 13, and the upper battery feeding port 13 is communicated with the bottom of the upper battery. An upper anti-seepage material layer 11 and an upper battery alumina fiber thermal insulation board 10 are laid on the upper battery cathode graphite block 9. The upper battery alumina fiber thermal insulation board 10 is an alumina fiber thermal insulation board to prevent heat dissipation.

[0038] Steel-aluminum explosion blocks 25 are welded on the upper battery cathode steel bar 8 and the lower battery anode steel bar 23 on the other side of the upper battery cathode graphite block 9 and the lower battery anode graphite block 22 on the side connected to the power supply 31. One end of the explosion block is welded to the aluminum soft strip 26 by welding, and the other end of the aluminum soft strip is welded to the aluminum busbar 27. The aluminum busbar 27 is connected to the DC / AC inverter 28, and then connected to the step-up transformer 29 and the load 30. The load 30 is an AC load.

[0039] The application method of the battery of the present invention is as follows: By using the different electrode potentials of metals in the liquid electrolyte, elements more electropositive than bismuth are retained in the lower battery anode mother liquid layer 21 and the upper battery anode mother liquid layer 17, while elements more electro-negative than bismuth move in the lower battery liquid electrolyte layer 20 and the upper battery liquid electrolyte layer 16 and precipitate on the lower surface of the isolation graphite plate 18 and the upper battery cathode graphite block 9. In the present invention, the battery is divided into an upper battery and a lower battery with the isolation graphite plate 18 as the boundary.

[0040] Inject the lower battery anode mother liquid into the lower battery so that the horizontal height of the lower battery anode mother liquid layer 21 reaches 35 - 40 cm. Inject the lower battery liquid electrolyte so that the horizontal height of the lower battery liquid electrolyte layer 20 reaches 7 - 10 cm and then touches the lower surface of the isolation graphite plate 18. Continue to inject the upper battery anode mother liquid into the upper battery at the upper battery feeding port 13 so that the horizontal height of the upper battery anode mother liquid layer 17 reaches 35 - 40 cm; Inject the upper battery liquid electrolyte so that the horizontal height of the upper battery liquid electrolyte layer 16 reaches 7 - 10 cm and makes the upper battery liquid electrolyte layer 16 contact the upper battery cathode graphite block 9.

[0041] Connect the power supply to start charging. The current intensity is 20 - 500 KA, the working voltage is 3.5 - 6.0 V, the charging working temperature is 260 - 550 °C, and the charging time is 2 - 3 hours. The horizontal heights of the lower battery anode mother liquor layer 21 and the upper battery anode mother liquor layer 17 gradually decrease to 20 - 25 cm. Above the lower battery liquid electrolyte layer 20 and the upper battery liquid electrolyte layer 16, the upper battery precipitates the upper battery metallic lithium 15 and the lower battery precipitates the lower battery metallic lithium 19, which gradually increase. Measure or estimate the precipitation amount of the precipitated metal. After charging is completed, start discharging. Steel-aluminum explosive blocks 25 are welded on the other side steel rods of the power supply 31 connected to the upper battery cathode graphite block 9 and the lower battery anode graphite block 22. One end of the aluminum soft strip 26 is welded to the explosive block by welding, and the other end of the aluminum soft strip is welded to the aluminum busbar 27. The aluminum busbar 27 is connected to the DC / AC inverter 28, and then connected to the step-up transformer 29 and the load 30. During the discharging process, the metallic lithium precipitated during charging returns to the anode master alloy, and the discharging process is completed.

[0042] Both the above-mentioned lower battery anode mother liquor layer 21 and the upper battery anode mother liquor layer 17 adopt a Li-Bi-Sn alloy liquid, in which the molar ratio of bismuth-tin alloy at the eutectic point of 139 °C is 57:43, and the density is 8.4 - 8.7 g / cm 3 ; LiI-KI is used as the battery electrolyte, and the liquid electrolyte ratio is 58:42. The eutectic temperature is about 260 °C, and the density is 2.71 - 2.76 g / cm 3 , the operating temperature is 280 - 300 °C, and the density of metallic lithium is 0.543 g / cm 3 . The densities of the lower battery liquid electrolyte layer 20 and the upper battery liquid electrolyte layer 16 are less than those of the lower battery anode mother liquor layer 21 and the upper battery anode mother liquor layer 17. The lower battery liquid electrolyte layer 20 and the upper battery liquid electrolyte layer always float on the upper layers of the lower battery anode mother liquor layer 21 and the upper battery anode mother liquor layer 17 respectively.

[0043] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0044] In the present invention, specific examples are used to illustrate the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A liquid metal battery for industrial applications, characterized in that: It includes a housing, and a corrosion-resistant lining is fixedly connected to the inner wall of the housing. The corrosion-resistant lining includes an alumina fiber board fixedly connected to the inner wall of the housing. A clay insulation brick, a side anti-seepage material layer, and a magnesia brick lining are sequentially arranged inside the alumina fiber board; a plurality of lower battery anode graphite blocks are laid above the corrosion-resistant lining at the bottom inside the housing. Lower battery anode steel bars are respectively inserted at both ends of the lower battery anode graphite blocks; a lower battery anode mother liquid layer, a lower battery liquid electrolyte layer, and lower battery metallic lithium are sequentially arranged above the lower battery anode graphite blocks. An isolation graphite board is fixedly arranged above the lower battery metallic lithium. An upper battery anode mother liquid layer, an upper battery liquid electrolyte layer, and upper battery metallic lithium are sequentially arranged above the isolation graphite board. A plurality of upper battery cathode graphite blocks are evenly laid above the upper battery metallic lithium. Upper battery cathode steel bars are respectively inserted at both ends of the upper battery cathode graphite blocks; an upper part anti-seepage material layer and an upper battery alumina fiber insulation board are sequentially arranged on the top of the upper battery cathode graphite blocks; the lower battery anode steel bars and the upper battery cathode steel bars at one end of the lower battery anode graphite blocks and the upper battery cathode graphite blocks are respectively electrically connected to a power source, and the lower battery anode steel bars and the upper battery cathode steel bars at the other end of the lower battery anode graphite blocks and the upper battery cathode graphite blocks are respectively electrically connected to a DC / AC inverter. The DC / AC inverter is connected to a load through a booster; lower battery feeding port isolation walls and upper battery feeding port isolation walls are respectively arranged on both sides inside the housing; the bottom of the lower battery feeding port isolation wall contacts the upper end surface of the lower battery anode mother liquid layer, the top of the lower battery feeding port isolation wall is fixedly connected to one end of the upper battery alumina fiber insulation board. A lower battery feeding port is formed between one side of the lower battery feeding port isolation wall and the adjacent magnesia brick lining. A lower battery feeding port cover is fixedly arranged at the top of the lower battery feeding port; the bottom of the upper battery feeding port isolation wall contacts the upper end surface of the upper battery anode mother liquid layer, the top of the upper battery feeding port isolation wall is fixedly connected to the other end of the upper battery alumina fiber insulation board. An upper battery feeding port is formed between one side of the upper battery feeding port isolation wall and the adjacent magnesia brick lining. An upper battery feeding port cover is fixedly arranged at the top of the upper battery feeding port; steel-aluminum explosion blocks are respectively fixedly arranged at the outer ends of the lower battery anode steel bars and the upper battery cathode steel bars; the lower battery anode steel bars at one end of the lower battery anode graphite blocks are respectively connected to aluminum soft tapes through the steel-aluminum explosion blocks in one-to-one correspondence. The aluminum soft tapes are connected to the anode of the power source through an aluminum bus bar. The lower battery anode steel bars at the other end of the lower battery anode graphite blocks are respectively connected to aluminum soft tapes through the steel-aluminum explosion blocks in one-to-one correspondence. The aluminum soft tapes are connected to the anode interface of the DC / AC inverter through another aluminum bus bar.

2. The liquid metal battery for industrial application according to claim 1, characterized in that: The lower battery anode graphite blocks are fixedly laid on the magnesia brick lining at the bottom inside the housing.

3. The liquid metal battery for industrial application according to claim 1, wherein: The upper battery cathode steel bars located at one end of the upper battery cathode graphite block are respectively connected with aluminum soft tapes through steel-aluminum explosion blocks in one-to-one correspondence. The aluminum soft tapes are connected with the cathode of the power supply through an aluminum busbar. The upper battery cathode steel bars located at the other end of the upper battery cathode graphite block are respectively connected with aluminum soft tapes through steel-aluminum explosion blocks in one-to-one correspondence. The aluminum soft tapes are connected with the cathode interface of the DC / AC inverter through another aluminum busbar.

4. A method for applying a liquid metal battery for industrial applications according to any one of claims 1 to 3, characterized in that: It includes the following steps: S1: Inject the lower battery anode mother liquor to make the thickness of the lower battery anode mother liquor reach 35 - 40 cm; S2: Inject the lower battery liquid electrolyte to the lower surface of the isolation graphite plate; S3: Inject the upper battery anode mother liquor until the thickness of the upper battery anode mother liquor reaches 35 - 40 cm; S4: Inject the upper battery liquid electrolyte until the upper battery liquid electrolyte contacts the upper battery cathode graphite block; S5: Connect the power supply to start charging; S6: As the power supply is connected for charging, metallic lithium in the upper battery and metallic lithium in the lower battery are precipitated and float to the surfaces of their respective adjacent liquid electrolytes until the thicknesses of the metallic lithium in the upper battery and the metallic lithium in the lower battery are 15 - 25 cm respectively; S7: Disconnect the power supply, the battery starts to discharge, the metallic lithium gradually turns into lithium ions and enters the underlying alloy, and the inverter converts direct current into alternating current and then boosts the voltage for load use.

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