Aluminum-air battery monomer convenient for hydrogen collection and electric pile

Abstract

The invention discloses an aluminum-air battery monomer convenient for hydrogen collection and an electric pile, the aluminum-air battery monomer convenient for hydrogen collection comprises an aluminum electrode and an air electrode, and the air electrode is provided with an electrolyte cavity with an opening at the upper end; a liquid inlet is formed in the lower left part of the air electrode and is communicated with the electrolyte cavity through a liquid inlet channel; a liquid return port is formed in the right lower part of the air electrode, a backflow cavity is formed in the right side of the air electrode, the lower end of the backflow cavity is connected with the liquid return port, and the upper end of the backflow cavity is connected with the hydrogen discharge port; one or more overflow holes are sequentially formed in the upper end of the left side of the backflow cavity in the height direction, and the overflow holes communicate with the electrolyte cavity and the backflow cavity; when the liquid level of the monomer electrolyte reaches the overflow hole, the monomer electrolyte flows into the backflow cavity and then enters the liquid return opening, and at the moment, hydrogen is collected and discharged upwards through the hydrogen discharging opening due to light mass. The problems that hydrogen is difficult to collect and potential safety hazards exist in the power generation process of the aluminum-air battery and the system are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum-air batteries, and in particular to an aluminum-air battery cell and a battery stack that are convenient for collecting hydrogen. Background Art

[0002] At present, existing aluminum-air batteries (especially high-power aluminum-air batteries), such as CN217823010U, CN105280989A, etc., will produce a large amount of hydrogen during the power generation process. However, the generated hydrogen is mostly not collected and directly discharged into the environment, which will cause safety hazards and limit the application scenarios of aluminum-air batteries.

[0003] Therefore, there is an urgent need for an aluminum-air battery cell and battery stack that is easy to collect hydrogen, and to achieve the discharge and collection of hydrogen through gas-liquid separation. Summary of the invention

[0004] In order to solve the problems in the prior art, the present invention provides an aluminum-air battery cell and a battery stack that are convenient for collecting hydrogen.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: An aluminum-air battery cell convenient for collecting hydrogen includes an aluminum electrode and an air electrode, the air electrode has an electrolyte cavity with an upper opening, the aluminum electrode is placed in the electrolyte cavity of the air electrode, a liquid inlet is arranged at the lower left of the air electrode, and the liquid inlet is connected to the electrolyte cavity through a liquid inlet channel; A liquid return port is provided at the lower right of the air electrode, and a reflux chamber is provided at the right side of the air electrode, the lower end of the reflux chamber is connected to the liquid return port, and the upper end of the reflux chamber is connected to the hydrogen discharge port; One or more overflow holes are arranged in sequence along the height direction at the upper end of the left side of the reflux chamber, and the overflow holes connect the electrolyte chamber and the reflux chamber; when the liquid level of the monomer electrolyte reaches the overflow hole, it will flow into the reflux chamber and then enter the return liquid port. At this time, due to the light weight of hydrogen, it will be collected and discharged upward through the hydrogen discharge port.

[0006] Furthermore, the liquid inlet channel is a serpentine extended channel.

[0007] Furthermore, the liquid inlet channel includes a first liquid inlet channel located at the bottom and a second liquid inlet channel located at the top, and both the first liquid inlet channel and the second liquid inlet channel extend in the left-right direction; The left end of the first liquid inlet channel is connected to the liquid inlet port, the right end of the first liquid inlet channel is connected to the right end of the second liquid inlet channel through the connecting hole, and the left end of the second liquid inlet channel is connected to the bottom of the electrolyte chamber.

[0008] Furthermore, the reflux chamber is extended in the up-down direction.

[0009] Furthermore, the cumulative flow rate of the overflow hole is greater than or equal to the flow rate of the liquid inlet.

[0010] Furthermore, the hydrogen exhaust port extends in the front-to-back direction and penetrates the air electrode.

[0011] Furthermore, a protrusion is arranged on the front side of the hydrogen exhaust port, and a sealing ring is arranged on the outer sleeve of the protrusion; and a concave surface cooperating with the protrusion is arranged on the rear side of the hydrogen exhaust port.

[0012] Furthermore, the liquid inlet and liquid return port extend in the front-to-back direction and penetrate the air electrode; The front side of the liquid inlet is provided with a protrusion, and the outer cover of the protrusion is provided with a sealing ring; the rear side of the liquid inlet is provided with a concave surface matching with the protrusion; A protrusion is arranged at the front side of the liquid return port, and a sealing ring is arranged at the outer cover of the protrusion; a concave surface matching with the protrusion is arranged at the rear side of the liquid return port.

[0013] The present invention also discloses an aluminum-air battery stack that is convenient for collecting hydrogen, comprising the aluminum-air battery monomer, wherein a plurality of aluminum-air battery monomers are arranged in a front-to-rear direction and connected to form an aluminum-air battery stack; The protrusion of the hydrogen discharge port of the front aluminum-air battery cell together with the sealing ring is embedded in the concave surface of the hydrogen discharge port of the rear aluminum-air battery cell, and they are connected in sequence to realize the connection of the hydrogen discharge ports of multiple aluminum-air battery cells to form a hydrogen recovery channel; the hydrogen discharge port at one end of the aluminum-air battery stack is connected with a plug, and the hydrogen discharge port at the other end is connected with a hydrogen discharge interface, and the hydrogen discharge interface is used to connect the hydrogen collection pipe; The liquid inlets of each aluminum-air battery cell are interconnected and sealed by a sealing ring; the liquid return ports of each aluminum-air battery cell are interconnected and sealed by a sealing ring; the liquid inlet and liquid return port at one end of the aluminum-air battery stack are both blocked with plugs; the liquid inlet at the other end of the aluminum-air battery stack is connected to the liquid inlet connector, and the liquid return port is connected to the liquid return connector.

[0014] Furthermore, a plurality of tie rod holes are distributed in the circumferential position of each air electrode cell, and tie rods are inserted into the tie rod holes. Both ends of the tie rods are locked by nuts so that all the aluminum-air battery cells are pressed together.

[0015] Beneficial effects of the present invention: Compared with the existing monomer structure, the present invention adds an overflow hole to the aluminum-air battery monomer and forms a gas-liquid separation structure in conjunction with the reflux cavity. When the electrolyte liquid level in the monomer reaches the overflow hole, it will flow into the reflux cavity and then into the liquid return port. At this time, due to the light weight of hydrogen, it will be collected and discharged upward through the hydrogen discharge port. The present invention solves the problem of difficulty in collecting hydrogen and potential safety hazards in the power generation process of aluminum-air batteries and systems.

[0016] In the process of forming a fuel cell stack from monomers, the present invention simultaneously forms a hydrogen recovery channel composed of hydrogen discharge ports, centrally collects hydrogen from all monomers, and has high recovery efficiency.

[0017] In the present invention, the liquid inlet channel connecting the liquid inlet and the electrolyte chamber is a serpentine extension channel, so that the liquid inlet channel is extended as much as possible, the distance of the liquid inlet is lengthened, and the problem of continuous liquid loss of the aluminum-air battery is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the aluminum-air battery cell in the present invention; Figure 2 A top view of an aluminum-air battery cell in the present invention; Figure 3 for Figure 2 AA section view in; Figure 4 for Figure 3 BB section diagram in; Figure 5 for Figure 3 CC profile in ; Figure 6 for Figure 3 DD profile in; Figure 7 It is a three-dimensional schematic diagram of the aluminum-air battery stack in the present invention; Figure 8 This is a front view of the aluminum-air battery stack of the present invention; Fig. 9 for Figure 8 EE profile in ; Fig.10 for Figure 8 FF cross-section diagram in.

[0019] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] Embodiment 1: like Figures 1 to 6 As shown, this embodiment provides an aluminum-air battery cell that is convenient for collecting hydrogen, including an aluminum electrode 2 and an air electrode 1. The air electrode 1 has an electrolyte cavity with an upper opening. The aluminum electrode 2 is placed in the electrolyte cavity of the air electrode 1, and a sealing gasket 3 is provided at the docking position between the two.

[0022] The lower left of the air electrode 1 is provided with a liquid inlet 101, which extends in the front-to-back direction and penetrates the air electrode 1. A protrusion is provided at the front side of the liquid inlet 101, and a sealing ring is provided on the protrusion jacket; a concave surface matching with the protrusion is provided at the rear side of the liquid inlet.

[0023] The liquid inlet 101 is connected to the bottom of the electrolyte chamber through a liquid inlet channel. The liquid inlet channel is a serpentine extension channel, which is extended as much as possible to lengthen the distance of the liquid inlet, thereby solving the problem of continuous liquid loss in aluminum-air batteries.

[0024] Specifically in this embodiment, the liquid inlet channel includes a first liquid inlet channel 103 located at the bottom and a second liquid inlet channel 104 located at the top, and the first liquid inlet channel 103 and the second liquid inlet channel 103 both extend in the left-right direction. The left end of the first liquid inlet channel 103 is connected to the liquid inlet 101, the right end of the first liquid inlet channel 103 is connected to the right end of the second liquid inlet channel 104 through the connecting hole 105, the left end of the second liquid inlet channel 104 is connected to the liquid inlet hole 106, and the liquid inlet hole 106 is connected to the bottom of the electrolyte chamber. When the electrolyte enters the monomer through the liquid inlet 101, the liquid inlet channel 103, the connecting hole 105, the liquid inlet channel 104, and the liquid inlet hole 106 in sequence under the action of the pump.

[0025] A liquid return port 102 is provided at the lower right of the air electrode 1, and the liquid return port 102 extends in the front-to-back direction and penetrates the air electrode 1. A protrusion is provided at the front side of the liquid return port 102, and a sealing ring is provided on the protrusion jacket; a concave surface matching the protrusion is provided at the rear side of the liquid return port.

[0026] Meanwhile, a reflux chamber 110 extending in the up-down direction is provided on the right side of the air electrode 1 , the lower end of the reflux chamber 110 is connected to the liquid return port 102 , and the upper end of the reflux chamber 110 is connected to the hydrogen discharge port 111 .

[0027] The hydrogen outlet 111 extends in the front-to-back direction and penetrates the air electrode 1. A hydrogen outlet protrusion 113 is provided at the front side of the hydrogen outlet 111, and a sealing ring is provided on the outer cover of the hydrogen outlet protrusion 113; a hydrogen outlet concave surface 112 matching with the hydrogen outlet protrusion 113 is provided at the rear side of the hydrogen outlet 111.

[0028] Three overflow holes 107, 108, 109 are arranged in sequence along the height direction at the upper end on the left side of the reflux chamber, and the overflow holes 107, 108, 109 connect the electrolyte chamber and the reflux chamber 110. The cumulative flow of the overflow holes 107, 108, 109 is greater than or equal to the flow of the liquid inlet 101. When the liquid level of the monomer electrolyte reaches the overflow holes 107, 108, 109, it will flow into the reflux chamber 110 and then enter the liquid return port 102. At this time, due to the light weight of hydrogen, it will be collected and discharged upward through the hydrogen discharge port 111 to achieve gas-liquid separation.

[0029] A plurality of tie rod holes 114 are provided on the left, right and bottom sides of the aluminum-air battery cell. The tie rod holes 114 are used to insert tie rods 201 to achieve connection and fixation of the cell stack.

[0030] Embodiment 2: like Figures 7 to 10 As shown, this embodiment provides an aluminum-air battery stack that is convenient for collecting hydrogen, including the aluminum-air battery cells of embodiment 1. A plurality of aluminum-air battery cells 208 are arranged in the front-to-back direction and connected in parallel to form an aluminum-air battery stack.

[0031] The protrusion 113 of the hydrogen discharge port of the front aluminum-air battery cell is embedded in the concave surface 112 of the hydrogen discharge port of the rear aluminum-air battery cell together with the sealing ring, and they are connected in sequence to realize the connection of the hydrogen discharge ports of multiple aluminum-air battery cells to form a hydrogen recovery channel 204. The hydrogen discharge port 111 at one end of the aluminum-air battery stack is connected to a plug 202, and the hydrogen discharge port at the other end is connected to a hydrogen discharge interface 203, which is used to connect a hydrogen collection pipe, and the hydrogen collection pipe transports hydrogen to a collection container.

[0032] The liquid inlet 101 of each aluminum-air battery cell is interconnected and sealed by a sealing ring. The liquid return port 102 of each aluminum-air battery cell is interconnected and sealed by a sealing ring. The liquid inlet and liquid return port at one end of the aluminum-air battery stack are both blocked by a plug 205; the liquid inlet at the other end of the aluminum-air battery stack is connected to the liquid inlet connector 206, and the liquid return port is connected to the liquid return port connector 207.

[0033] Tie rods 201 are inserted into the tie rod holes 114 on the left and right sides and the bottom of each aluminum-air battery cell. The two ends of the tie rod 201 are locked by nuts and end plates 209, so that all aluminum-air battery cells are pressed together to ensure that the sealing ring is pressed and sealed without leakage.

[0034] In the process of forming a fuel cell stack from monomers, the present invention simultaneously forms a hydrogen recovery channel 204 composed of hydrogen discharge ports, which centrally collects hydrogen from all monomers and has high recovery efficiency.

[0035] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

[0036] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0037] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An aluminum-air battery cell for convenient hydrogen collection, comprising an aluminum electrode and an air electrode, wherein the air electrode has an electrolyte cavity with an upper opening, and the aluminum electrode is placed in the electrolyte cavity of the air electrode, characterized in that: The lower left of the air electrode is provided with a liquid inlet, which is connected to the electrolyte chamber through a liquid inlet channel; A liquid return port is provided at the lower right of the air electrode, and a reflux chamber is provided at the right side of the air electrode, the lower end of the reflux chamber is connected to the liquid return port, and the upper end of the reflux chamber is connected to the hydrogen discharge port; One or more overflow holes are arranged in sequence along the height direction at the upper end of the left side of the reflux chamber, and the overflow holes connect the electrolyte chamber and the reflux chamber; when the liquid level of the monomer electrolyte reaches the overflow hole, it will flow into the reflux chamber and then enter the return liquid port. At this time, due to the light weight of hydrogen, it will be collected and discharged upward through the hydrogen discharge port.

2. The aluminum-air battery cell for facilitating hydrogen collection according to claim 1, characterized in that: The liquid inlet channel is a serpentine extended channel.

3. The aluminum-air battery cell for facilitating hydrogen collection according to claim 2, characterized in that: The liquid inlet channel comprises a first liquid inlet channel located at the bottom and a second liquid inlet channel located at the top, and the first liquid inlet channel and the second liquid inlet channel both extend in the left-right direction; The left end of the first liquid inlet channel is connected to the liquid inlet port, the right end of the first liquid inlet channel is connected to the right end of the second liquid inlet channel through the connecting hole, and the left end of the second liquid inlet channel is connected to the bottom of the electrolyte chamber.

4. The aluminum-air battery cell for facilitating hydrogen collection according to claim 1, characterized in that: The reflux cavity is extended along the up-down direction.

5. The aluminum-air battery cell for facilitating hydrogen collection according to claim 1, characterized in that: The cumulative flow rate of the overflow hole is greater than or equal to the flow rate of the liquid inlet.

6. The aluminum-air battery cell for facilitating hydrogen collection according to any one of claims 1 to 5, characterized in that: The hydrogen exhaust port extends in the front-to-back direction and penetrates the air electrode.

7. The aluminum-air battery cell for facilitating hydrogen collection according to claim 6, characterized in that: A protrusion is arranged at the front side of the hydrogen discharge port, and a sealing ring is arranged at the outer sleeve of the protrusion; a concave surface matching with the protrusion is arranged at the rear side of the hydrogen discharge port.

8. The aluminum-air battery cell for facilitating hydrogen collection according to claim 7, characterized in that: The liquid inlet and liquid return port extend in the front-to-back direction and penetrate the air electrode; The front side of the liquid inlet is provided with a protrusion, and the outer cover of the protrusion is provided with a sealing ring; the rear side of the liquid inlet is provided with a concave surface matching with the protrusion; A protrusion is arranged at the front side of the liquid return port, and a sealing ring is arranged at the outer cover of the protrusion; a concave surface matching with the protrusion is arranged at the rear side of the liquid return port.

9. An aluminum-air battery stack that is convenient for collecting hydrogen, characterized in that: The aluminum-air battery cell according to claim 8 is included, and a plurality of aluminum-air battery cells are arranged in a front-to-rear direction and connected to form an aluminum-air battery stack; The protrusion of the hydrogen discharge port of the front aluminum-air battery cell together with the sealing ring is embedded in the concave surface of the hydrogen discharge port of the rear aluminum-air battery cell, and they are connected in sequence to realize the connection of the hydrogen discharge ports of multiple aluminum-air battery cells to form a hydrogen recovery channel; the hydrogen discharge port at one end of the aluminum-air battery stack is connected with a plug, and the hydrogen discharge port at the other end is connected with a hydrogen discharge interface, and the hydrogen discharge interface is used to connect the hydrogen collection pipe; The liquid inlets of each aluminum-air battery cell are interconnected and sealed by a sealing ring; the liquid return ports of each aluminum-air battery cell are interconnected and sealed by a sealing ring; the liquid inlet and liquid return port at one end of the aluminum-air battery stack are both blocked with plugs; the liquid inlet at the other end of the aluminum-air battery stack is connected to the liquid inlet connector, and the liquid return port is connected to the liquid return connector.

10. The aluminum-air battery stack for facilitating hydrogen collection according to claim 9, characterized in that: A plurality of tie rod holes are provided at circumferential positions of each air electrode cell. Tie rods are inserted into the tie rod holes. Both ends of the tie rods are locked by nuts so that all aluminum-air battery cells are pressed together.

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