Channel structure of aluminum-air fuel cell

Abstract

The utility model provides a channel structure of an aluminum-air fuel cell, which comprises a single shell, a metal electrode assembly and an air electrode assembly, the metal electrode assembly comprises an aluminum plate, the air electrode assembly comprises an anode membrane, and an electrolyte chamber is formed among the single shell, the aluminum plate and the anode membrane. Each single shell is provided with a main liquid inlet channel, a bottom liquid inlet channel, a side liquid inlet channel and an overflow channel, the bottom liquid inlet channel and the side liquid inlet channel are both communicated with the main liquid inlet channel, and the bottom liquid inlet channel is provided with a bottom baffle used for enabling electrolyte to flow to the electrolyte cavity from the bottom in a uniform mode; and a side baffle plate is arranged at the side liquid inlet channel and is used for enabling the electrolyte to uniformly flow to the electrolyte chamber from the side part. According to the structure, electrolyte can circulate in the battery more smoothly.

Description

Technical Field

[0001] The utility model mainly relates to the technical field related to aluminum-air fuel cells, in particular to a channel structure of an aluminum-air fuel cell. Background Art

[0002] Aluminum-air fuel cells use high-purity aluminum (99.99% aluminum) as the negative electrode, oxygen as the positive electrode, and potassium hydroxide (KOH) or sodium hydroxide (NaOH) aqueous solution as the electrolyte. Aluminum absorbs oxygen from the air, and a chemical reaction occurs when the battery is discharged, and aluminum and oxygen react to convert into aluminum oxide. In a single cell, aluminum (Al) is used as the negative electrode and oxygen as the positive electrode. There is a pair of auxiliary air electrodes on both sides of the aluminum-air battery, which serve as the positive electrode of the aluminum-air battery and only consume aluminum and a small amount of water during operation.

[0003] In the prior art, such as the related technology of a compartment stack element and a compartment stack assembly for a metal-air battery with announcement number CN 218101460 U, the single body shell has two independent cavities, and the bottom of each cavity is provided with a short tube for the flow of electrolyte, the short tube is used for liquid inlet, and the liquid outlet hole is connected to the liquid outlet pipe and connected to the outside through the liquid outlet pipe for liquid discharge, that is, the prior art adopts the method of bottom liquid inlet and single-port liquid outlet.

[0004] The main problems with the existing technology are: the existing aluminum-air battery electrolyte is injected from the bottom or side, resulting in poor liquid circulation inside the battery, which can easily cause heating, product blockage, etc.; the existing aluminum-air battery has a single overflow port, and the gas generated by the battery reaction is difficult to discharge in time, making the solution not circulate smoothly inside the battery; the existing aluminum-air battery generally uses external air cooling to dissipate heat, and the fan blows directly on the side of the battery to achieve a cooling effect, which is inefficient. Utility Model Content

[0005] In order to solve the deficiencies of current technology, the utility model combines the existing technology and provides a channel structure of an aluminum-air fuel cell from the perspective of practical application, which has the advantage of enabling the electrolyte to circulate more smoothly inside the battery.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A channel structure of an aluminum-air fuel cell comprises a monomer shell, a metal electrode assembly, and an air electrode assembly. The metal electrode assembly comprises an aluminum plate, and the air electrode assembly comprises a positive electrode membrane. An electrolyte chamber is formed between the monomer shell, the aluminum plate, and the positive electrode membrane. A main liquid inlet channel, a bottom liquid inlet channel, a side liquid inlet channel, and an overflow channel are arranged on the monomer shell. The bottom liquid inlet channel and the side liquid inlet channel are both connected to the main liquid inlet channel. A bottom baffle is arranged at the bottom liquid inlet channel to allow the electrolyte to flow evenly from the bottom to the electrolyte chamber. A side baffle is arranged at the side liquid inlet channel to allow the electrolyte to flow evenly from the side to the electrolyte chamber.

[0008] Furthermore, the side liquid inlet channel is arranged in the middle of the monomer shell, and the side liquid inlet channel forms two electrolyte chambers on both sides of the monomer shell, and the electrolyte flows from the side liquid inlet channel to the two electrolyte chambers simultaneously through the side baffles on both sides.

[0009] Furthermore, the bottom baffle is in contact with the bottom surface of the aluminum plate, and a plurality of bosses are evenly arranged on the bottom baffle along the length direction of the bottom surface of the aluminum plate, and channels for electrolyte to flow into the electrolyte chamber are formed between adjacent bosses;

[0010] The side baffle is in contact with the side surface of the aluminum plate, and a plurality of bosses are evenly arranged on the side baffle along the height direction of the side surface of the aluminum plate, and channels for electrolyte to flow into the electrolyte chamber are formed between adjacent bosses.

[0011] Furthermore, the bottom baffle is connected to the single body shell via a snap connection, and the side baffle is integrally formed with the single body shell.

[0012] Furthermore, the overflow channel includes a first overflow channel and a second overflow channel, and the first overflow channel and the second overflow channel are respectively located on both sides of the monomer shell.

[0013] Furthermore, a height of a first overflow port at one end of the first overflow channel for communicating with the electrolyte chamber is smaller than a height of a second overflow port at one end of the second overflow channel for communicating with the electrolyte chamber.

[0014] Furthermore, the first liquid outlet at the other end of the first overflow channel is arranged at the corner of the monomer shell, and the second liquid outlet at the other end of the second overflow channel is arranged at another corner of the monomer shell.

[0015] Furthermore, an air inlet channel is provided on the monomer shell, an annular protrusion is provided at the air inlet channel, an air inlet notch is provided at the annular protrusion, and the air inlet notch is located at the corner of the monomer shell.

[0016] Furthermore, the metal electrode assembly also includes a negative electrode cap, a connecting post and a quick-release connector. The connecting post is connected to the end surface of the aluminum plate. The quick-release connector is clamped on the negative electrode cap and realizes conductivity through the connecting post and the aluminum plate.

[0017] Beneficial effects of the utility model:

[0018] 1. In the utility model, the structure of injecting electrolyte from the bottom and the middle to both sides at the same time is adopted, and the unique water inlet baffle structure is used to make the liquid inlet more uniform, effectively avoiding the problem of electrolyte directly hitting the aluminum plate when injected. This method can make the electrolyte flow fully inside the battery, solve the problems of heating and blockage, so that the battery cell can be made larger and release more energy.

[0019] 2. In the utility model, double overflow ports are designed, the lower overflow port is mainly used to discharge the solution, and the higher overflow port is mainly used to discharge the gas generated by the battery reaction, so that the solution circulates more smoothly inside the battery.

[0020] 3. The overall structural design of the utility model is compact and reasonable, which is convenient for the arrangement of liquid inlet and outlet pipes and the assembly of multiple single cells.

[0021] 4. In the utility model, a built-in air duct is adopted, and the cooling airflow generated by the cooling fan is all blown to the surface of the battery in a fan shape, which effectively solves the heat dissipation problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Attached Figure 1 This is a schematic diagram of the overall structure of the battery of the utility model.

[0023] Attached Figure 2 This is a schematic diagram of the positions of the bottom baffle and the side baffle of the utility model.

[0024] Attached Figure 3 This is a schematic diagram of the structure of the bottom liquid inlet channel of the utility model.

[0025] Attached Figure 4 The utility model is a schematic diagram of the single shell structure Figure 1 .

[0026] Attached Figure 5 The utility model is a schematic diagram of the single shell structure Figure 2 .

[0027] Attached Figure 6 This is a schematic diagram of the bottom baffle structure of the utility model.

[0028] Attached Figure 7 It is a schematic diagram of the liquid and air inlet methods of the utility model.

[0029] Attached Figure 8 It is a schematic diagram of the internal cross-sectional structure of the battery of the utility model.

[0030] Attached Fig. 9 This is a schematic diagram of the position structure of the connecting column of the utility model. DETAILED DESCRIPTION

[0031] The utility model is further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the utility model and are not used to limit the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by this application.

[0032] refer to Figure 1-Figure 8 The above is a schematic diagram related to the channel structure of an aluminum-air fuel cell provided in this embodiment.

[0033] The aluminum-air fuel cell mainly includes a monomer shell 18, a metal electrode assembly, and an air electrode assembly. The metal electrode assembly mainly includes an aluminum plate 5, and the air electrode assembly mainly includes a positive electrode membrane 16. An electrolyte chamber 17 is formed between the monomer shell 18, the aluminum plate 5, and the positive electrode membrane 16. Figure 8 As shown, the positive electrode film 16 is disposed on the front and rear sides of the aluminum plate 5 , so that electrolyte chambers 17 for electrolyte circulation can be formed on the front and rear sides of the aluminum plate 5 .

[0034] In this embodiment, a main liquid inlet channel 1, a bottom liquid inlet channel 8, a side liquid inlet channel 9 and an overflow channel are provided on the monomer shell 18. The bottom liquid inlet channel 8 and the side liquid inlet channel 9 are perpendicular to each other, the bottom liquid inlet channel 8 and the side liquid inlet channel 9 are both connected to the main liquid inlet channel 1, a bottom baffle 6 is provided in the bottom liquid inlet channel 8, and a side baffle 7 is provided in the side liquid inlet channel 9.

[0035] The electrolyte can be diverted to the bottom inlet channel 8 and the side inlet channel 9 through the main inlet channel 1. The electrolyte in the bottom inlet channel 8 is diverted by the bottom baffle 6 and flows evenly from the bottom of the electrolyte chamber 17 to the electrolyte chamber 17. The electrolyte in the side inlet channel 9 is diverted by the side baffle 7 and flows evenly from the side of the electrolyte chamber 17 to the electrolyte chamber 17, and finally flows out through the overflow channel, thereby realizing the circulation of the electrolyte. The flow and uniformity of the electrolyte circulation are guaranteed by the bottom and side inlet methods.

[0036] As shown in the reference figure, in this embodiment, a group of metal electrode assemblies are respectively arranged on the left and right sides of the monomer shell 18, and each group of metal electrode assemblies is configured with two groups of air electrode assemblies, so that two connected electrolyte chambers 17 are formed on the left and right sides of the monomer shell 18, and the bottom of each electrolyte chamber 17 corresponds to a bottom liquid inlet channel 8, and the two electrolyte chambers 17 share a side liquid inlet channel 9, which is arranged in the middle of the monomer shell 18. The electrolyte flows from the side liquid inlet channel 9 to the left and right electrolyte chambers 17 at the same time through the side baffles 7 on both sides.

[0037] In this embodiment, the side baffle 7 and the single shell 18 are an integrated structure, and the bottom baffle 6 and the single shell 18 are snap-fit ​​connected. Figure 6 The figure shows the structure of the bottom baffle 6. The bottom baffle 6 is installed at the bottom of the aluminum plate 5. Several bosses 15 are evenly arranged on the bottom baffle 6 along the length direction of the bottom of the aluminum plate 5. The surface of the bosses 15 is higher than the surface of the aluminum plate 5. In this way, after the structure is closed, the electrolyte can flow into the electrolyte chambers 17 formed in front and behind the aluminum plate 5 through the gaps between adjacent bosses 15, and will not directly impact the aluminum plate 5. Similarly, several bosses are evenly arranged on both sides of the side baffle 7 along the height direction of the side of the aluminum plate 5. The gaps formed between adjacent bosses are used to allow the electrolyte to flow into the electrolyte chambers 17 on both sides, and will not directly impact the aluminum plate 5. The flow of the electrolyte is more uniform and smooth through the diversion effect of the bottom baffle 6 and the side baffle 7.

[0038] The overflow channel structure of this embodiment adopts a unique double overflow port design. The overflow channel includes a first overflow channel 10 and a second overflow channel 11, and the first overflow channel 10 and the second overflow channel 11 are respectively located on both sides of the monomer shell 18. And the height of the first overflow port 12 at one end of the first overflow channel 10 for communicating with the electrolyte chamber 17 is less than the height of the second overflow port 13 at one end of the second overflow channel 11 for communicating with the electrolyte chamber 17. The first overflow port 12 and the second overflow port 13 are respectively arranged on both sides of the electrolyte chamber 17 for electrolyte discharge, and the height of the first overflow port 12 is less than the height of the second overflow port 13. With such a structural design, when the electrolyte circulates, the electrolyte first passes through the lower first overflow port 12, which is mainly used to discharge the solution, and the gas produced by the chemical reaction will rise in the electrolyte chamber 17. The higher second overflow port 13 can timely discharge the gas produced by the chemical reaction and part of the electrolyte, so that the electrolyte circulates more smoothly inside the battery.

[0039] In order to facilitate the docking of multiple fuel cells and the design of the electrolyte circulation pipeline, in this embodiment, the first liquid outlet 4 at the other end of the first overflow channel 10 is arranged at the corner of the monomer shell 18, and the second liquid outlet 3 at the other end of the second overflow channel 11 is arranged at the other corner opposite to the monomer shell 18. The electrolyte is mainly discharged through the first overflow port 12, the first overflow channel 10, and the first liquid outlet 4, and part of the electrolyte and gas are mainly discharged through the second overflow port 13, the second overflow channel 11, and the second liquid outlet 3.

[0040] As a preferred solution of this embodiment, in order to ensure the cooling effect of the battery, an air inlet channel 2 is further provided on the monomer shell 18, and an annular protrusion is provided at the air inlet channel 2, and an air inlet notch 14 is provided at the annular protrusion. The air inlet notch 14 is located at the corner of the monomer shell 18. Through this structure, the cold air flow generated by the cooling fan is blown to the battery surface through the air inlet notch 14. Figure 7 As shown, since the air inlet notch 14 is located at the corner, the airflow blown out thereof will be blown to the battery surface in a fan shape, which can make the heat dissipation more efficient.

[0041] In the existing structure, the negative electrode of the aluminum-air battery is fastened to the cable by bolts, and it is troublesome to replace the aluminum electrode. This embodiment provides a structure that can effectively save time for replacing the aluminum electrode. Specifically, a connecting column 20 is inserted into the end face of the aluminum plate 5, and a quick-release connector 19 that can be connected by plugging and unplugging is installed on the negative electrode cover 21. After the quick-release connector 19 is installed, it contacts the connecting column 20 to achieve electrical conduction with the aluminum plate 5. After the quick-release connector 19 is pulled out, the aluminum plate 5 can be replaced conveniently and quickly.

Claims

1. A channel structure of an aluminum-air fuel cell, comprising a monomer shell, a metal electrode assembly, and an air electrode assembly, wherein the metal electrode assembly comprises an aluminum plate, the air electrode assembly comprises a positive electrode membrane, and an electrolyte chamber is formed between the monomer shell, the aluminum plate, and the positive electrode membrane, characterized in that: A main liquid inlet channel, a bottom liquid inlet channel, a side liquid inlet channel and an overflow channel are arranged on the monomer shell. The bottom liquid inlet channel and the side liquid inlet channel are both connected to the main liquid inlet channel. A bottom baffle is arranged at the bottom liquid inlet channel to allow the electrolyte to flow evenly from the bottom to the electrolyte chamber. A side baffle is arranged at the side liquid inlet channel to allow the electrolyte to flow evenly from the side to the electrolyte chamber.

2. The channel structure of the aluminum-air fuel cell according to claim 1, characterized in that: The side liquid inlet channel is arranged in the middle of the monomer shell, and the side liquid inlet channel forms two electrolyte chambers on both sides of the monomer shell. The electrolyte flows from the side liquid inlet channel to the two electrolyte chambers simultaneously through the side baffles on both sides.

3. The channel structure of the aluminum-air fuel cell according to claim 2, characterized in that: The bottom baffle is in contact with the bottom surface of the aluminum plate, and a plurality of bosses are evenly arranged on the bottom baffle along the length direction of the bottom surface of the aluminum plate, and channels for electrolyte to flow into the electrolyte chamber are formed between adjacent bosses; The side baffle is in contact with the side surface of the aluminum plate, and a plurality of bosses are evenly arranged on the side baffle along the height direction of the side surface of the aluminum plate, and channels for electrolyte to flow into the electrolyte chamber are formed between adjacent bosses.

4. The channel structure of the aluminum-air fuel cell according to claim 3, characterized in that: The bottom baffle is connected to the single body shell by snap-fit ​​connection, and the side baffle is integrally formed with the single body shell.

5. The channel structure of the aluminum-air fuel cell according to claim 1, characterized in that: The overflow channel includes a first overflow channel and a second overflow channel, and the first overflow channel and the second overflow channel are respectively located on both sides of the monomer shell.

6. The channel structure of the aluminum-air fuel cell according to claim 5, characterized in that: A height of a first overflow port at one end of the first overflow channel for communicating with the electrolyte chamber is smaller than a height of a second overflow port at one end of the second overflow channel for communicating with the electrolyte chamber.

7. The channel structure of the aluminum-air fuel cell according to claim 6, characterized in that: The first liquid outlet at the other end of the first overflow channel is arranged at the corner of the monomer shell, and the second liquid outlet at the other end of the second overflow channel is arranged at the other corner of the monomer shell.

8. The channel structure of the aluminum-air fuel cell according to claim 1, characterized in that: The monomer shell is also provided with an air inlet channel, an annular protrusion is provided at the air inlet channel, an air inlet notch is provided at the annular protrusion, and the air inlet notch is located at the corner of the monomer shell.

9. The channel structure of the aluminum-air fuel cell according to claim 1, characterized in that: The metal electrode assembly also includes a negative electrode cap, a connecting post and a quick-release connector. The connecting post is connected to the end surface of the aluminum plate. The quick-release connector is clamped on the negative electrode cap and realizes electrical conduction through the connecting post and the aluminum plate.

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