An integrated metal-air battery stack

Abstract

The utility model relates to an integrated metal air battery stack. Composed of multiple micro-metal air battery monomers in series; the battery monomer includes the battery frame, air electrode positive sheet and metal negative pole, the battery frame body is provided with the wire of connecting air electrode and the wire of connecting metal negative pole, and the bottom of the frame is provided with the battery monomer liquid inlet hole and battery monomer liquid outlet hole for circulating electrolyte; two air electrode positive sheets are arranged at both ends of the frame, the positive sheet closes the inside of the frame to accommodate electrolyte, the conductive sheet of the positive pole is exposed to the frame through the wire of connecting air electrode, and the gap between the battery monomers is left as a ventilation channel; the metal negative pole is located between the two positive sheets, and the wire of connecting metal negative pole is exposed to the frame; the adjacent two battery monomer frames are connected through the wire. Realize high voltage stable output. The degree of process integration is high, breaks through the limitation of traditional metal air battery design, and improves the commercialization potential of metal air battery.

Description

Technical Field

[0001] This utility model relates to a battery stack structure, and more particularly to an integrated metal-air battery stack. Background Technology

[0002] Metal-air batteries based on metals such as zinc, aluminum, and magnesium have advantages such as high theoretical energy density, low cost, abundant raw materials, environmental friendliness, and safe operation. Their theoretical energy density is far higher than that of traditional lead-acid batteries, zinc-manganese batteries, and lithium-ion batteries, and they have received increasing attention in fields such as electronic products, electric vehicles, and emergency backup power.

[0003] Existing metal-air batteries typically consist of multiple cells connected in series. Each cell includes a battery frame, a positive electrode fixed to both sides of the frame, and a negative electrode inserted into the frame through its upper part. The positive and negative electrodes are connected to an external circuit via external wires. The positive electrode and the interior of the frame are sealed to contain the electrolyte, which can be continuously replenished through a circulation pipe. At the negative electrode, the metal undergoes an electrochemical oxidation reaction, losing electrons and dissolving in the electrolyte. Electrons travel through the external circuit to the three-phase interface of the air electrode. At the positive electrode, an oxygen reduction reaction occurs, where oxygen from the air is captured and diffuses into the catalyst layer, where it undergoes an electrochemical reduction reaction at the interface with the electrolyte. During this reaction, oxygen is continuously consumed as fuel at the positive electrode, while the metal serves as fuel at the negative electrode; the discharge process is similar to that of a fuel cell.

[0004] In recent years, researchers have developed a large number of electrode materials for metal-air batteries and achieved significant breakthroughs in electrolyte and single-cell structure design. However, large-scale commercial development has not yet been achieved. The reason for this is that metal-air batteries have low single-cell voltages and large volumes / weights, making it impossible to achieve efficient battery stack designs. Traditional metal-air batteries typically have a single-cell voltage of around 1.0V, but are usually large in size. When using battery stack designs for series boosting, the large volume of single cells significantly increases the overall volume of the metal-air battery, resulting in low power density and an inability to meet high-power discharge requirements.

[0005] In summary, how to effectively solve the problems of large cell size and low power density in metal-air batteries is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of existing metal-air battery stacks and provide a novel metal-air battery stack structure assembled using an integrated method to obtain a metal-air battery stack with a high discharge platform.

[0007] The technical solution of this utility model is as follows:

[0008] An integrated metal-air battery stack is disclosed, comprising multiple miniaturized metal-air battery cells connected in series. Each battery cell includes a battery frame, an air electrode positive plate, and a metal negative electrode. The battery frame body has wires connecting the air electrode and the metal negative electrode. The bottom of the frame has battery cell inlet and outlet holes for circulating electrolyte. Two air electrode positive plates are provided at both ends of the frame, which enclose the interior of the frame to contain the electrolyte. The wires connecting the air electrodes are connected to the outside. The gaps between the battery cells are left as ventilation channels. The metal negative electrode is located between the two positive electrode plates, and the wires connecting the metal negative electrode are exposed outside the frame. Adjacent battery cell frames are connected by wires.

[0009] The integrated metal-air battery stack is preferably provided with wires connecting the air electrodes positioned on the side of the air electrodes in the battery frame.

[0010] The integrated metal-air battery stack is preferably connected to a metal negative electrode by a wire on the metal negative electrode.

[0011] The integrated metal-air battery stack is preferably constructed with the liquid inlet and liquid outlet of each battery cell located at the bottom of the frame.

[0012] The integrated metal-air battery stack is preferably provided with gaps on both sides of the individual battery frame for air passage.

[0013] The integrated metal-air battery stack consists of multiple micro-element metal-air battery cells connected in series. The stack is housed within an outer casing. Power output and adjustment structures are located on the outside of the casing. An electrolyte tank is located inside the casing. The inlet and outlet of the electrolyte tank are connected through an electrolyte circulation pipe 11. The electrolyte enters the battery through the inlet hole in the individual cell and flows out of the battery through the outlet hole into the electrolyte circulation pipe. The electrolyte circulation pipe 11 is connected to the electrolyte tank 12, enabling the entire system to form an electrolyte circulation system.

[0014] The specific explanation is as follows:

[0015] An integrated metal-air battery stack includes

[0016] A battery cell, comprising a battery frame, an air electrode and a metal negative electrode, wherein the frame body is provided with a wire for connecting the air electrode and a wire for connecting the metal negative electrode, and the bottom of the frame is provided with an inlet hole and an outlet hole for circulating electrolyte.

[0017] Furthermore, the positive electrode of the cell includes two positive electrode plates that are respectively sealed and fixed at both ends of the frame. The two positive electrode plates enclose the interior of the frame to contain the electrolyte. The conductive plate of the positive electrode passes through the wire connecting the air electrode and is exposed outside the frame. The gap between the battery cells is left as a ventilation channel, so that oxygen in the outside air can come into contact with the positive electrode through the air channel.

[0018] The negative electrode is disposed inside the frame and is located between the two positive electrode plates, and the wire connecting the metal negative electrode is exposed outside the frame.

[0019] Preferably, in the above-mentioned battery cell, the wire connecting the air electrode is disposed on the side of the air electrode in the frame.

[0020] Preferably, in the above-mentioned battery cell, the wire connecting the metal negative electrode is disposed on the metal negative electrode.

[0021] Preferably, in the above-mentioned battery cell, the liquid inlet and liquid outlet are respectively located at the bottom of the frame.

[0022] A metal-air battery stack includes multiple battery cells connected in series, wherein the battery cells are as described in any one of the above descriptions, and the frames of two adjacent battery cells are connected by wires, and an electrolyte circulation system circulates through corresponding pipes.

[0023] The miniaturized battery cell of the metal-air battery stack provided by this utility model includes a frame, a positive electrode, and a negative electrode. The frame includes a frame body with wires connecting to the air electrode. The sidewalls of the frame have inlet and outlet holes for liquid, and the gaps between the battery cells serve as ventilation channels. Oxygen from the air diffuses through the air electrode of the positive electrode to the three-phase interface of the electrolyte and reacts.

[0024] The positive electrode comprises two positive electrode plates sealed and fixed at both ends of the frame, which enclose the interior of the frame to contain the electrolyte. The wire connecting to the air electrode protrudes from the frame for easy connection. The electrolyte can be injected into and discharged from the battery cell through the inlet and outlet ports. The negative electrode is located inside the frame, between the two positive electrode plates; that is, the anode is located in the electrolyte. The wire connecting to the metal negative electrode protrudes from the frame.

[0025] When assembling a metal-air battery stack using the battery cells provided by this invention, multiple battery cells are connected in series, and adjacent miniaturized battery cells are connected by wires with a gap in between. This ensures that sufficient air or oxygen can enter between the two frames through the gas channel and react with the positive electrode. The gap between adjacent battery cells allows air to pass through, resulting in a compact structure that significantly reduces the volume of the metal-air battery stack and increases its power density.

[0026] To achieve the above objectives, this utility model provides an integrated metal-air battery stack using the aforementioned miniaturized battery cells. This metal-air battery stack includes any of the aforementioned battery cells. Since the aforementioned battery cells possess the above-mentioned technical effects, the metal-air battery stack incorporating these battery cells should also possess corresponding technical effects. A battery management system integrates several battery cells into a battery box, with each battery cell providing approximately 1V of voltage. The corresponding batteries are connected in series as needed, allowing for flexible adjustment.

[0027] This invention relates to an integrated metal-air battery stack. Its principle lies in the highly integrated series connection of miniaturized metal-air batteries through a battery management system, achieving stable high-voltage output. This invention connects several battery cells in series using a miniaturized method, providing approximately 1V per cell within a minimal, engineerable volume. Combined with an electrolyte circulation system, it achieves high-voltage output and allows for flexible adjustment of the output voltage platform according to the application scenario. The process exhibits a high degree of integration and strong stability. This invention overcomes the limitations of traditional metal-air battery design and greatly enhances the commercialization potential of metal-air batteries. Attached Figure Description

[0028] Figure 1 Schematic diagram of a miniaturized metal-air battery cell

[0029] Figure 2 Schematic diagram of the connection between the miniaturized metal-air battery cell and the electrolyte circulation channel.

[0030] Figure 3 Schematic diagram of wire connections between miniaturized metal-air battery cells

[0031] Figure 4 Schematic diagram of integrated metal-air battery stack

[0032] Figure 5 Schematic diagram of a 110V integrated metal-air battery stack

[0033] in:

[0034] 1. Battery frame; 2. Air electrode positive plate; 3. Metal negative electrode; 4. Battery cell liquid inlet; 5. Battery cell liquid outlet; 6. Wire connecting the air electrode; 7. Wire connecting the metal negative electrode; 8. Outer casing; 9. Miniaturized metal-air battery cell; 10. Power output and regulation structure; 11. Electrolyte circulation pipe; 12. Electrolyte tank; 13. Electrolyte circulation inlet of the battery stack; 14. Electrolyte circulation outlet of the battery stack. Detailed Implementation

[0035] like Figure 1 As shown, in this embodiment, the present invention includes a miniaturized metal-air battery cell, a battery frame 1, positive air electrode plates 2 disposed on both sides of the frame, a negative metal electrode 3 disposed in the middle of the frame, a battery cell inlet 4 disposed on the lower side of the metal-air battery, a battery cell outlet 5 disposed on the lower side of the metal-air battery, a wire 6 connected to the air electrode, and a wire 7 connected to the negative metal electrode. When the electrolyte flows into the battery cell through the battery cell inlet 4, the positive air electrode plate 2 obtains oxygen from the air, and reacts with the negative metal electrode 3 to complete the single-cell battery reaction, outputting electrical energy to the outside through the wires 6 and 7 connecting the air electrode and the negative metal electrode. A schematic diagram of the connection between the miniaturized metal-air battery cell and the electrolyte circulation channel is shown below. Figure 3 As shown.

[0036] like Figure 4 As shown, in this embodiment, the present invention includes an integrated metal-air battery stack composed of miniaturized metal-air battery cells, an outer casing 8 disposed on the outside of the metal-air battery stack, miniaturized metal-air battery cells 9 disposed inside the casing, a power output and regulation structure 10 disposed on the outside of the casing, an electrolyte circulation pipe 11 disposed on the lower side of the metal-air battery cells, and an electrolyte tank 12 disposed inside the casing. The individual batteries are connected by positive and negative wires, that is, the negative terminal of one battery cell is connected to the positive terminal of the next battery cell, and all the battery cells are connected in this manner to form a series structure. When the miniaturized metal-air battery cells 9 react, the output voltage of the battery stack is adjusted by the power output and regulation structure 10. The electrolyte circulation pipe 11, combined with the electrolyte tank 12, enables the entire system to form an electrolyte circulation. The flow direction of the electrolyte is shown by the arrow in the figure, entering the battery stack from the electrolyte circulation inlet 13, and after circulation, entering the electrolyte tank 12 through the electrolyte circulation outlet 14. To maintain a stable power output from the battery stack. A schematic diagram of the wire connections between the miniaturized metal-air battery cells is shown below. Figure 3 As shown.

[0037] Figure 5This diagram illustrates a 110V integrated metal-air battery stack. To meet outdoor survival needs with a 110V output, the battery stack provided by this invention simply requires connecting 110 individual cells in series to stably output 110V, satisfying practical requirements. Existing technologies, due to the large size of individual cells, struggle to achieve voltage outputs exceeding 100V, hindering the commercial application of metal-air batteries. The integrated battery stack provided by this invention meets these requirements, significantly expanding the commercial applications of metal-air batteries.

[0038] This invention applies to the technical field of metal-air battery stack design.

[0039] Although the embodiments of this utility model are described with reference to actual solutions, they do not constitute a limitation on the meaning of this utility model. For those skilled in the art, modifications to the implementation schemes and combinations with other schemes based on this specification are obvious.

Claims

1. An integrated metal-air battery stack; characterized in that, It is composed of multiple miniaturized metal-air battery cells connected in series. Each battery cell includes a battery frame, an air electrode positive plate, and a metal negative electrode. The battery frame body is provided with wires connecting the air electrode and the metal negative electrode. The bottom of the frame is provided with battery cell inlet holes and battery cell outlet holes for circulating electrolyte. Two air electrode positive plates are provided at both ends of the frame. The positive plates enclose the interior of the frame to contain the electrolyte. The wires connecting the air electrodes are connected to the outside. The gaps between the battery cells are left as ventilation channels. The metal negative electrode is located between the two positive plates, and the wires connecting the metal negative electrode are exposed outside the frame. Adjacent battery cell frames are connected by wires.

2. The integrated metal-air battery stack as described in claim 1, characterized in that, The wires connecting the air electrode are positioned on the side of the air electrode in the battery frame.

3. The integrated metal-air battery stack as described in claim 1, characterized in that, The wire connecting the negative metal terminal is laid on the negative metal terminal.

4. The integrated metal-air battery stack as described in claim 1, characterized in that, The liquid inlet and liquid outlet of each battery cell are located at the bottom of the frame.

5. The integrated metal-air battery stack as described in claim 1, characterized in that, The battery cell frame has gaps on both sides for air passage.

6. The integrated metal-air battery stack as described in claim 1, characterized in that, The metal-air battery stack, composed of multiple miniaturized metal-air battery cells connected in series, is housed within an outer casing. The power output and regulation structure is located on the outside of the casing, while an electrolyte tank is located inside. The electrolyte inlet and outlet of the electrolyte tank are connected through an electrolyte circulation pipe. The electrolyte enters the battery through the inlet hole in the individual cell and flows out of the battery through the outlet hole into the electrolyte circulation pipe. The electrolyte circulation pipe is connected to the electrolyte tank, thus forming an electrolyte circulation system throughout the entire system.

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