Aluminum-air battery slag-liquid separation device and aluminum-air battery system

Abstract

The invention relates to the field of metal fuel cells, and discloses an aluminum-air battery slag-liquid separation device, comprising an electrolyte box assembly, a lifting mechanism, a slag box assembly, and a frame; the electrolyte box assembly comprises a box body, a pipeline for connecting the box body and the slag box assembly, and a valve for controlling the on-off of the pipeline; the bottom of the box body is a conical necking structure, and a slag discharge port is provided at the bottom of the box body, and a first telescopic tube and an inlet of a valve are fixedly connected to the slag discharge port in sequence; the slag box assembly comprises a hollow slag box, and a slag bag detachably fixedly installed in the inner space of the slag box; the slag box comprises a bottom box, and two slag box covers slidably connected to the bottom box, and the slag box covers can slide to both sides to open and close the top opening of the bottom box; a second telescopic tube is arranged on the top of the slag bag, the second telescopic tube is detachably connected to the outlet of the valve, and a one-way valve is also arranged on the second telescopic tube; the scheme can solve the technical problem that slag precipitated during the working process of the existing aluminum-air battery system is not easy to remove.

Description

Technical Field

[0001] The present invention relates to the field of metal fuel cells, and in particular to an aluminum-air battery slag-liquid separation device and an aluminum-air battery system. Background Art

[0002] Aluminum-air battery is a new type of fuel cell with a theoretical specific energy of up to 8100WH / kg. It is a high-specific-energy energy storage battery. Aluminum-air battery uses metal aluminum as the negative electrode and oxygen in the air as the positive electrode. High-power aluminum-air battery systems generally use aqueous solutions of sodium hydroxide or potassium hydroxide as electrolytes. In the aluminum-air battery system, the positive and negative electrodes of the battery are integrated in the battery stack, and the electrolyte is stored in the electrolyte tank; when the battery is started, the electrolyte in the electrolyte tank is pumped into the battery stack to activate the electrochemical reaction and start discharging. The electrolyte circulates continuously between the electrolyte tank and the battery stack; when the battery is turned off, the electrolyte circulation stops, and all the electrolyte in the battery stack is discharged into the electrolyte storage tank, the electrochemical reaction of the battery stack stops, and the discharge ends.

[0003] During the reaction of aluminum-air batteries, the metal aluminum in the negative electrode undergoes an oxidation reaction and continuously dissolves into the electrolyte. The oxygen in the air is reduced to oxygen anions under the action of the catalyst, and then reacts with water in the electrolyte to form OH ions. Under the action of the electric field, the OH ions react with the dissolved Al3 + Combined to form aluminum hydroxide, aluminum hydroxide continues to react with sodium hydroxide in the electrolyte in the alkaline electrolyte and finally dissolves in the electrolyte in the form of NaAlO3 or NaAl(OH)4. When the concentration of sodium aluminate exceeds its solubility in the electrolyte, slag (aluminum hydroxide solid) will gradually precipitate. As the amount of precipitation increases, it may block the pipeline system and cause system failure.

[0004] In order to avoid the above problems, a filtering device or a centrifugal device is generally added to the pipeline system to separate the slag and liquid. For example, an aluminum-air battery electrolyte circulation system disclosed in the prior art (publication number: CN117855691A) includes a filter box and a sedimentation tank. The filter box is used to receive the electrolyte to be treated for hydrolysis reaction and generate white slag slurry. The filter box moves up and down in the sedimentation tank to perform slag separation on the white slag slurry, and finally the slag (aluminum hydroxide solid) in the white slurry is left in the filter box. However, the problem with the prior art is that after the slag in the filter box is dumped, the inner wall will still be attached with residue, and it is still very difficult to remove the residue. In addition, the battery system with the filter box added is large in size and not compact in structure. It is inevitable to contact a small amount of electrolyte during operation. Since the electrolyte is corrosive, the operation requirements are high and there are certain safety hazards, which is not conducive to commercial promotion. Summary of the invention

[0005] The present invention aims to provide an aluminum-air battery slag-liquid separation device and an aluminum-air battery system to solve the technical problem that the slag precipitated during the operation of the existing aluminum-air battery system is difficult to remove.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] A slag-liquid separation device for an aluminum-air battery comprises an electrolyte box assembly, a lifting mechanism, and a slag box assembly which are arranged in sequence from top to bottom, and also comprises a frame which is located on all sides and provides support; the electrolyte box assembly comprises a box body, a pipe for connecting the box body and the slag box assembly, and a valve for controlling the on-off of the pipe; the bottom of the box body is a conical necking structure, and a slag discharge port is provided at the bottom of the box body, and a first telescopic tube and an inlet of the valve are fixedly connected to the slag discharge port in sequence; the slag box assembly comprises a hollow slag box and a slag bag which is detachably fixedly installed in the inner space of the slag box; the slag box comprises a bottom box, two slag box covers which are slidably connected to the bottom box, and the slag box covers can slide to both sides to open and close the top opening of the bottom box; a second telescopic tube is arranged on the top of the slag bag, the second telescopic tube is detachably connected to the outlet of the valve, and a one-way valve is also arranged on the second telescopic tube; the lifting mechanism comprises a lifting tray which is fixedly connected to the valve.

[0008] Beneficial effects:

[0009] 1. Convenient and timely cleaning of slag: a slag box assembly including a hollow slag box and a slag bag detachably fixedly installed in the inner space of the slag box is provided. The slag bag is a disposable item, which is convenient for timely cleaning of slag, reduces the residual problem caused by repeated use of the filtering device, ensures the cleanliness of the slag box after each replacement, and improves the convenience of operation and hygiene standards.

[0010] 2. Safe and convenient operation process: The electrolyte tank assembly and the slag tank assembly are separated by operating the lifting mechanism. Combined with the second telescopic tube and the one-way valve in the slag bag neck, the inner cavity of the slag bag is expanded, and the liquid level in the slag bag is lowered to avoid residual liquid overflow caused by excessive liquid level when the slag bag is taken out. The whole process does not require direct contact with corrosive electrolyte, which significantly improves the safety of operation. The slag box cover can slide to both sides to open and close the top opening of the bottom box, which is convenient and quick to replace the slag bag, reducing maintenance time and labor intensity, and improving work efficiency.

[0011] 3. Integrated design and simplified system structure: The slag-liquid separation device is integrated into the electrolyte tank assembly as a whole, avoiding the need to add additional filtering devices or centrifugal devices to increase the equipment footprint, making the entire battery system smaller in size and more compact in structure, which is conducive to commercial promotion.

[0012] In summary, through the above improvements, the aluminum-air battery slag-liquid separation device not only achieves efficient slag-liquid separation and prevents pipeline blockage, but also simplifies the system structure through integrated design, improves the safety and convenience of operation, ensures that there is no contact with the electrolyte during the slag bag replacement process, thoroughly cleans the residue, and avoids secondary pollution. In particular, the design of disposable slag bags further facilitates the timely cleaning of slag, improves the convenience and hygiene standards of operation, and provides a more reliable and safe guarantee for the operation of aluminum-air batteries.

[0013] Preferably, as an improvement, a window is provided on each of two opposite sides of the box body, and the window is detachably fixedly connected to the box body.

[0014] Beneficial effects: This design significantly improves the convenience of operation and the accuracy of electrolyte management. In particular, when the slag removal operation may cause the electrolyte level in the box to drop, the electrolyte can be visually monitored and appropriately replenished through the window. This not only simplifies the operating process, but also ensures that the battery system is always in the best working condition, reduces system performance fluctuations caused by insufficient or excessive liquid levels, and further enhances the convenience of operation of the entire slag-liquid separation device and the stability of the system.

[0015] Preferably, as an improvement, a group of fan assemblies for heat dissipation by air cooling are respectively installed on the other two side surfaces of the box body that are opposite to each other and are not provided with windows.

[0016] Beneficial effects: It not only effectively reduces the electrolyte temperature, prompting the supersaturated sodium aluminate to precipitate and settle faster, but also optimizes the temperature distribution inside the electrolyte, avoiding local overheating, thereby improving the efficiency of slag-liquid separation. At the same time, uniform temperature control helps maintain the optimal working state of the electrolyte and reduces the problem of unstable system performance caused by temperature fluctuations. In addition, the fan components are arranged on the opposite sides of the box, forming a good air circulation path, further enhancing the heat dissipation effect.

[0017] Preferably, as an improvement, a slag flushing pipeline is provided at the bottom of the box body, and the slag flushing pipeline includes a slag flushing pipeline one, a water pump, and a slag flushing pipeline two which are connected in sequence, the inlet of the slag flushing pipeline one and the outlet of the slag flushing pipeline two are respectively connected to the box body, and the outlet of the slag flushing pipeline two faces the slag discharge port at the bottom of the box body.

[0018] Beneficial effects: The most prominent effect of this improvement is that it significantly improves the thoroughness of residue cleaning and the cleanliness of the system. The slag flushing pipeline driven by the water pump can efficiently and thoroughly flush the reaction products remaining on the inner wall of the tapered necking structure on the side of the box and the bottom into the slag bag, ensuring that no residue adheres to the inner wall of the box, avoiding the problem of secondary pollution. This not only improves the effect of slag-liquid separation, but also reduces the risk of system failure caused by residue accumulation. At the same time, the intermittent flushing design effectively prevents excessive agitation of the electrolyte, maintains the stability of the electrolyte, and further enhances the operating efficiency and reliability of the system.

[0019] Preferably, as an improvement, a top liquid level sensor and a bottom liquid level sensor are provided in the upper area of ​​the box body, the top liquid level sensor is used to monitor the maximum liquid level of the electrolyte in the box body, and the bottom liquid level sensor is used to monitor the minimum allowable liquid level of the electrolyte in the box body.

[0020] Beneficial effects: The most prominent effect of this improvement is that it realizes real-time and accurate monitoring of the electrolyte level, avoiding operational risks and system failures caused by abnormal liquid levels. The top liquid level sensor can prevent the electrolyte from overflowing due to overfilling, reducing the risk of electrolyte leakage and potential harm to the surrounding environment; while the bottom liquid level sensor ensures that the electrolyte will not be lower than the minimum allowable liquid level, avoiding equipment damage or reduced slag-liquid separation efficiency due to insufficient liquid level. Through the coordinated work of these two sensors, the system can automatically trigger an alarm or take corresponding measures (such as replenishing electrolyte) to ensure the safety and continuity of operation. In addition, automated liquid level monitoring reduces the need for manual intervention, simplifies maintenance processes, improves overall work efficiency, and provides a more reliable guarantee for the stable operation of aluminum-air batteries.

[0021] Preferably, as an improvement, a panel is provided at the bottom of the frame, a guide rail is provided on the panel, the slag box is slidably connected to the guide rail, a latch is provided on one side of the slag box, and a fixing hole which is plugged into and cooperates with the latch is provided on the guide rail.

[0022] Beneficial effects: The most prominent effect of this improvement is that it greatly simplifies the removal and loading operations of the slag box, improves work efficiency and enhances safety. Through the sliding connection between the guide rail and the slag box, the operator can easily pull out or push the slag box along the guide rail without the effort of carrying heavy objects, reducing labor intensity and operation time. The combination of the latch and the fixing hole ensures that the slag box is firmly fixed in the working state, prevents accidental movement due to vibration or other external forces, and ensures the stable operation of the system. In addition, this design makes the replacement of slag bags safer and more reliable, avoids the risk of electrolyte leakage that may occur during manual handling, and further improves the safety of operation.

[0023] Preferably, as an improvement, a notch is opened in the center of the slag box cover, a bayonet is provided at the bottom outlet of the second telescopic tube to engage with the notch, and a flange interface for clamp connection with a valve is provided at the top inlet of the second telescopic tube.

[0024] Beneficial effects: The most prominent effect of this improvement is that it improves the speed of removing the slag box and replacing the slag bag, improves work efficiency and enhances the sealing of the system. By opening a notch in the center of the slag box cover and engaging with the bayonet at the bottom of the second telescopic tube, the operator can quickly and accurately position and fix the slag bag, avoiding the problems of misalignment or loose connection that may exist in the traditional method. At the same time, the clamp connection between the flange interface at the top inlet of the second telescopic tube and the valve ensures the tightness and sealing of the connection, preventing the risk of electrolyte leakage.

[0025] Preferably, as an improvement, the lifting mechanism includes a lifting pallet, a U-shaped pull rod, a connecting rod, a pallet connecting block, and a fixed plate; the lifting pallet is guided and positioned by a vertical guide rail erected between the frames; the two end points of the U-shaped pull rod are T-shaped structures, the horizontal end of the T-shaped structure is respectively hinged to the fixed plates on both sides, the vertical end is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the pallet connecting block, and the pallet connecting block is fixedly connected to the lifting pallet.

[0026] Beneficial effects: The most prominent effect of this improvement is that it improves the operational reliability and work efficiency of the lifting mechanism. The lifting pallet is guided and positioned by the vertical guide rail, ensuring the stability and accuracy of the pallet during the lifting process, avoiding operational errors caused by shaking or offset. The unique T-shaped structure design of the U-shaped pull rod combined with the hinged connection method allows the operator to achieve the smooth rise and fall of the lifting pallet by simply pulling the U-shaped pull rod, reducing the complexity and labor intensity of manual operation. At the same time, the articulated design between the components ensures that the entire lifting mechanism is flexible and coordinated, and enhances the response speed and stability of the system. It provides a strong guarantee for the efficient and safe operation of the aluminum-air battery slag-liquid separation device.

[0027] The present invention also discloses an aluminum-air battery system, including the aluminum-air battery slag-liquid separation device, and also includes a control system, a battery stack, a liquid supply system, a liquid return pipeline, and an exhaust system; the control system is installed on the top of the frame; the inlet of the liquid supply system is connected to the liquid outlet of the electrolyte tank assembly, and the outlet of the liquid supply system is connected to the liquid inlet of the battery stack.

[0028] Beneficial effects: The aluminum-air battery system with an additional aluminum-air battery slag-liquid separation device has achieved an efficient slag-liquid separation process through a special integrated design and an automated control process. The slag-liquid separation device integrates improved designs such as slag flushing pipelines, windows, and fan components, which not only effectively promotes the precipitation and sedimentation of slag, but also ensures that the residue is thoroughly cleaned, avoiding secondary pollution, and improving the slag-liquid separation effect and the cleanliness of the system. Through the above design, the aluminum-air battery system not only achieves high integration and automated management of various functional modules, but also significantly improves the system's operating efficiency, safety, and maintenance convenience, providing reliable and safe technical guarantees for the large-scale application of aluminum-air batteries, which is conducive to commercial promotion.

[0029] Preferably, as an improvement, a temperature sensor and a heater are also installed in the box, and the control system is electrically connected to the top liquid level sensor, the bottom liquid level sensor, the temperature sensor, and the heater respectively.

[0030] Beneficial effects: The most prominent effect of this improvement is that it realizes comprehensive monitoring and automatic adjustment of electrolyte temperature and liquid level, which greatly improves the reliability and operational safety of the system. The electrolyte temperature is monitored in real time by a temperature sensor, and is precisely regulated in combination with a heater to ensure that the electrolyte operates within a suitable temperature range, avoiding a decrease in precipitation efficiency or system failure due to too low or too high temperature. Through precise temperature and liquid level management, the slag-liquid separation effect is further optimized, the maintenance frequency and cost are reduced, and a more reliable guarantee is provided for the efficient and safe operation of aluminum-air batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an axonometric view of a first embodiment of an aluminum-air battery slag-liquid separation device of the present invention;

[0032] Figure 2 for Figure 1 an isometric view of the electrolyte tank assembly 100;

[0033] Figure 3 for Figure 1 Right view of;

[0034] Figure 4 for Figure 2 A front view of the device (hiding the fan assembly 106);

[0035] Figure 5 for Figure 4 AA section view;

[0036] Figure 6 for Figure 5 A magnified schematic diagram of position B in the middle;

[0037] Figure 7 for Figure 4 Right view of;

[0038] Figure 8 A top view of 2;

[0039] Fig. 9 for Figure 8 CC section view;

[0040] Fig.10 for Figure 1 An axonometric view of the middle slag box assembly 300;

[0041] Fig.11 for Figure 1 A front view of the lifting mechanism 200;

[0042] Fig.12 for Fig.11 Right view of;

[0043] Fig.13 It is a front view of the aluminum-air battery system of the present invention;

[0044] Fig.14 for Fig.13 Rear view of. DETAILED DESCRIPTION

[0045] The following is further described in detail through specific implementation methods:

[0046] The reference numerals in the drawings of the specification include: electrolyte tank assembly 100, tank body 101, liquid return port 101-1, liquid outlet 101-2, block 101-3, exhaust port 101-4, first sealing ring 102, electrolyte tank cover 103, top liquid level sensor 104, bottom liquid level sensor 105, fan assembly 106, heater 107, window 108, second sealing ring 109, slag flushing pipeline 1 110, water pump 111, slag flushing pipeline 2 112, first telescopic tube 113, first clamp 114, valve 115, temperature sensor 116, fin tube 117, sealing gland 118, third sealing ring 119, slag discharge port 120, lifting mechanism 200, lifting tray 201, U-shaped pull rod 202, connecting rod 203, tray connecting block 204, fixing plate 205, connecting point 205-1, limiting hole 205-2, slag box assembly 300, slag box 310, slag box cover 311, telescopic slide rail 312, bottom box 313, first pull buckle 314, handle 315, second pull buckle 316, latch 317, slag bag 320, second telescopic tube 322, one-way valve 323, flange interface 324, fuel cell stack 400, liquid supply system 500, return liquid pipeline 600, control system 700, exhaust system 800, frame 900.

[0047] Embodiment 1 is basically as follows Figure 1-Figure 14 As shown:

[0048] like Figure 1 As shown, an aluminum-air battery slag-liquid separation device includes an electrolyte tank assembly 100, a lifting mechanism 200, a slag tank assembly 300, and the following aluminum-air battery system Fig.13 The control system 700 shown also includes frames 900 for installation located on both sides. The electrolyte tank assembly 100 and the slag tank assembly 300 are connected by a pipeline, and a valve 115 is provided on the pipeline to control the communication of the pipeline.

[0049] Combination Figure 2-Figure 9 As shown, the electrolyte tank assembly 100 is mainly composed of a tank body 101, a first sealing ring 102, an electrolyte tank cover 103, a fan assembly 106, a window 108, a second sealing ring 109, a first telescopic tube 113, a valve 115, a fin tube 117, a sealing gland 118, and a third sealing ring 119.

[0050] Specifically, Figure 2 As shown, an electrolyte tank cover 103 for sealing the top opening of the box body 101 is provided at the top of the electrolyte tank assembly 100, and the electrolyte tank cover 103 and the box body 101 are sealed by bolts, and a first sealing ring 102 made of rubber material is sleeved at the connection between the electrolyte tank cover 103 and the box body 101, which is used to strengthen the connection stability between the electrolyte tank cover 103 and the box body 101 and ensure the sealing inside the box body 101. A flange interface is fixedly provided on each of the two opposite sides around the box body 101, and the flange interface is fastened and connected with the corresponding window 108 by bolts. In order to strengthen the connection stability between the window 108 and the box body 101, a second sealing ring 109 made of rubber material is sleeved on the Farah interface. When it is necessary to observe the electrolyte inside the box body 101, the window 108 can be removed by removing the bolts used to fix the window 108 to view the inside of the box body 101. A group of fan assemblies 106 for heat dissipation by air cooling are respectively installed on the other two opposite sides around the box body 101. In the present embodiment, each group of fan assemblies 106 is composed of 6 axial flow fans. The shell of the axial flow fan is fastened to the box body 101 by bolts. The operation of the axial flow fan can enhance the air flow inside the box body 101 and take away the heat in time, thereby achieving a good cooling effect.

[0051] Combination Figure 5 and Figure 7As shown, the bottom of the box 101 is a conical necking structure to better collect the slag, and is provided with two slag discharge ports 120, the slag discharge ports 120 are connected to the first telescopic tube 113, and the bottom end of the first telescopic tube 113 is connected to the valve 115 through the first clamp 114. A slag flushing pipeline is also provided at the bottom of the box 101, and the slag flushing pipeline extends to the side of the box 101 where the window 108 is provided, and the slag flushing pipeline includes a slag flushing pipeline 110, a water pump 111, and a slag flushing pipeline 2 112 connected in sequence. One end of the slag flushing pipe 110 is connected to the pipe outlet on the bottom side of the box body 101, and the other end of the slag flushing pipe 110 is connected to the inlet of the water pump 111. The outlet of the water pump 111 is connected to one end of the slag flushing pipe 112, and the other end of the slag flushing pipe 112 is connected to the pipe inlet on the bottom side of the box body 101, so that the liquid in the slag flushing pipeline can continue to flow along the slag flushing pipeline to continuously flush the slag remaining at the bottom of the box body 101 with a tapered necking structure. It is worth mentioning that the outlet of the slag flushing pipe 112 should be toward the direction of the slag discharge port, so that as much slag as possible falls into the slag discharge port.

[0052] Combination Figure 4-Figure 6 As shown, a plurality of hollow fin tubes 117 for efficient heat conduction are arranged in the middle of the box 101, and continuous spiral fins are fixedly arranged on the outer surface of the fin tube 117, and a plurality of fins parallel to the axis direction of the fin tube 117 are fixedly arranged inside the fin tube 117. Mounting holes for fixing and mounting the fin tube 117 are provided on the two sides of the fan assembly 106 arranged on the box 101, and the opening ends of the fin tube 117 are fixedly mounted with the mounting holes on the box 101 by bolting, and a sealing gland 118 is covered at the position where the fin tube 117 protrudes from the box 101, and a through hole is provided on the sealing gland 118 corresponding to the hollow fin tube 117, and the bolts pass through the mounting plate and are threadedly fixed to the box 101. A groove is provided on the box body 101 close to the mounting hole, and a third sealing ring 119 made of rubber is embedded in the groove. The third sealing ring 119 is mounted on the fin tube 117. The function of the third sealing ring 119 is to strengthen the connection stability between the mounting plate and the box body 101, thereby ensuring the stable installation of the fin tube 117. Five fin tubes 117 are arranged in a cross shape to form a module, and the two end faces of each module are respectively tightened by bolts through sealing glands 118. A total of six groups of modules consisting of fin tubes 117 are arranged in the box body 101, showing a layout of two rows and three columns. The fin tubes 117 divide the box body 101 into three areas: upper, middle and lower. Fig. 9 As shown, the gaps between the fin tube modules are filled by the stoppers 101 - 3 fixed inside the box body 101 by welding.

[0053] Combination Figure 2 and Figure 7As shown, a top liquid level sensor 104 and a bottom liquid level sensor 105 are provided in the upper area of ​​the box 101. The top liquid level sensor 104 is used to monitor the highest liquid level in the liquid tank, and the bottom liquid level sensor 105 is used to monitor the lowest allowable liquid level of the electrolyte in the box 101. The liquid level sensor and the bottom liquid level sensor 105 are respectively electrically connected to the control system 700 in the aluminum-air battery system described below to transmit the signal to the control system 700 for centralized control by the control system 700. A liquid outlet 101-2 is provided on the side of the box 101 where the window 108 is provided. The setting height of the liquid outlet 101-2 is higher than the bottom liquid level sensor 105. A water pump 111 is connected to the liquid outlet 101-2 to supply liquid to the battery stack 400. A temperature sensor 116 is provided at the edge of the liquid outlet 101-2 for monitoring the electrolyte temperature. A heater 107 is installed below the bottom liquid level sensor 105, and the heater 107 is located near the liquid inlet. It heats and maintains the electrolyte temperature under low temperature conditions according to the signal of the control system 700. It is worth noting that the top liquid level sensor 104, the bottom liquid level sensor 105, the temperature sensor 116, and the heater 107 are all arranged inside the box 101 and fixed by bolts, and the bolts used are exposed to the outer surface of the box 101. An exhaust port 101-4 is also arranged on the box 101. The exhaust port 101-4 is used to exhaust the gas inside the box 101. The exhaust port 101-4 is arranged on the opposite side of the side where the bolts used to fix the top liquid level sensor 104 are located.

[0054] like Fig.10 As shown, the slag box assembly 300 includes a slag box 310 and a slag bag 320 detachably fixedly installed in the slag box 310 .

[0055] The slag box 310 is a hollow box made of hard plastic material, mainly composed of a bottom box 313 and two slag box covers 311 slidably connected to the bottom box 313. Specifically, a telescopic slide rail 312 is provided between the slag box cover 311 and the bottom box 313. The telescopic slide rail 312 is provided in the width direction of the slag box cover 311 and the bottom box 313. The slag box cover 311 can slide along the slide rail to both sides to open and close the top opening of the bottom box 313. A first pull buckle 314 and a second pull buckle 316 are respectively installed on the slag box covers 311 on both sides. When the slag box covers 311 on both sides are closed, the two pull buckles can be locked to fix the slag box covers 311 on both sides. Both ends of the bottom box 313 in the width direction are provided with handles 315, and a locking pin 317 is fixedly provided below the handle 315 at one end. In order to ensure the rapid disassembly and assembly of the slag box assembly 300, the slag box assembly 300 is slidably connected as a whole to a horizontal guide rail, and the guide rail is fixedly provided on the bottom panel of the frame 900, and a fixing hole is provided on the guide rail. When the position of the slag box 310 is fixed, the pin 317 is pressed down and inserted into the fixing hole on the guide rail to achieve the effect of locking the position.

[0056] The neck of the slag bag 320 is a second telescopic tube 322. In this embodiment, the second telescopic tube 322 is a plastic corrugated tube. The main body of the slag bag 320 is a cloth bag with a circular closing and fixed below the second telescopic tube 322. Specifically, a semicircular notch is opened in the center of the slag box cover 311, and a bayonet is set at the bottom of the second telescopic tube 322 to clamp the notch. Two one-way valves 323 are also set above the second telescopic tube 322. The top of the second telescopic tube 322 is a flange interface 324 that can be connected to the valve 115 by a clamp. The flange interface 324 and the bottom end face of the valve 115 at the bottom of the box body 101 are detachably connected by a clamp.

[0057] Combination Fig.11 and Fig.12 As shown, the lifting mechanism 200 includes a lifting tray 201 , a U-shaped pull rod 202 , a connecting rod 203 , a tray connecting block 204 , and a fixing plate 205 .

[0058] The valve 115 is fixedly connected to the lifting tray 201 by bolts, and the lifting tray 201 is guided and positioned by the vertical guide rails erected between the racks 900. The two end points of the U-shaped tie rod 202 are T-shaped structures, and the horizontal end of the T-shaped structure is respectively hinged to the fixed plates 205 on both sides at the connection point 205-1, and the vertical end is hinged to one end of the connecting rod 203, and the other end of the connecting rod 203 is hinged to the tray connection block 204. The tray connection block 204 is fixedly connected to the lifting tray 201 by bolts. When the U-shaped tie rod 202 is lifted, it is like Fig.11 As shown, when the U-shaped tie rod 202 is rotated clockwise, the U-shaped tie rod 202 will drive the connecting rod 203 and the lifting tray 201 to move upward in turn, and the lifting tray 201 will then push the two valves 115 upward, the first telescopic tube 113 connected to the upper part of the valve 115 is longitudinally compressed, and the second telescopic tube 322 on the slag bag 320 at the lower part of the valve 115 is longitudinally elongated. When the U-shaped tie rod 202 reaches the highest point, the rotation process cannot continue due to the gravity and the limiting effect of the arc-shaped limit hole 205-2 opened on the fixed plate 205, and the U-shaped tie rod 202 is locked and the lifting tray is suspended; when the U-shaped tie rod 202 is pulled down, it is like Fig.11 As shown, when the U-shaped pull rod is rotated counterclockwise and passes the locking dead point, due to the action of gravity and the guiding action of the arc-shaped limit hole 205-2 opened on the fixed plate 205, the lifting tray 201 together with the connecting rod 203 moves downward to the initial state, the valve 115 on the tray falls, the first telescopic tube 113 connected to the upper part of the valve 115 is longitudinally stretched, and the second telescopic tube 322 at the lower part of the valve 115 is longitudinally compressed.

[0059] The specific application process is as follows:

[0060] After the electrolyte enters the fin tube 117 in the middle of the box 101, the fan assembly 106 on both sides of the fin tube 117 is used to cool the electrolyte to reduce the solubility of sodium aluminate in the electrolyte, so that the supersaturated electrolyte is cooled and precipitated here. At the same time, the staggered fin tubes 117 form a barrier in the box 101 to limit the upward movement of the fluid, so that the upward movement of the precipitated particles is blocked and mainly remains in the middle and lower areas. After a period of time, the reaction product settles and falls to the bottom of the box 101, and finally falls into the slag bag 320 through the slag discharge channel at the bottom of the box 101. The slag discharge channel is a vertical channel composed of the first telescopic tube 113, the valve 115, the flange interface 324, and the second telescopic tube 322. The reaction product (hereinafter referred to as residue) remaining on the side of the box 101 is flushed into the slag bag 320 through the circulation pipeline set on the side of the box 101. Specifically, the electrolyte is extracted by the water pump 111 in the pipeline to intermittently flush the inner wall of the conical necking structure at the bottom of the box 101 to flush the residue into the slag bag 320. When the slag bag 320 is full, the liquid connection between the upper and lower parts is disconnected by closing the valve 115 between the electrolyte tank and the slag bag 320, and then the second telescopic tube 322 at the neck of the slag bag 320 is extended by the lifting mechanism 200. The working process of the lifting mechanism 200 is to pull up the U-shaped pull rod 202, the U-shaped pull rod 202 drives the connecting rod 203 and then drags the lifting tray 201 to move upward, the lifting tray 201 lifts the two valves 115 upward, the first telescopic tube 113 connected to the upper part of the valve 115 is compressed, and the second telescopic tube 322 located at the lower part of the valve 115 and the upper part of the slag bag 320 is extended. At this time, due to the negative pressure inside the first telescopic tube 113 of the slag bag 320, the one-way valve 323 sucks air inward, and the liquid level inside the slag bag 320 gradually drops below the top of the slag bag 320. At this time, manually open the connecting clamp between the flange interface 324 of the slag bag 320 and the valve 115, disconnect the slag bag 320 from the valve 115, pull out the pin 317 in the fixing hole, and then drag the slag box 310 along the guide rail, release the first and second pull buckles 314 and 316 on the slag box cover 311, slide the slag box covers 311 on both sides along the width direction of the slag box 310, take out the slag bag 320 with sediment, replace it with a new empty slag bag 320 and put it into the slag box 310, close the slag cover 103 again, and finally put it into the bottom of the box body 101 and lock the connecting clamp to reconnect it with the valve 115, and pull down the U-shaped pull rod 202 to reset it after opening the valve 115. At this time, the slag removal operation is completed. Since the removal of the residue may cause the electrolyte level in the box 101 to drop, the electrolyte can be appropriately replenished according to the situation by opening the window 108. The slag bag 320 is a disposable item, and the entire process does not require contact with the electrolyte, which can safely and effectively achieve slag-liquid separation.

[0061] An aluminum-air battery system comprising the above-mentioned aluminum-air battery slag-liquid separation device:

[0062] like Fig.13 and Fig.14 As shown, the aluminum-air battery system is mainly composed of a rack 900, a control system 700, a stack 400, a liquid supply system 500, a liquid return pipeline 600, an electrolyte tank assembly 100, a lifting mechanism 200, a slag box assembly 300, and an exhaust system 800. The rack 900 is a multi-layer chassis, and a control system 700, a stack 400, an electrolyte tank assembly 100, a lifting mechanism 200, and a slag box assembly 300 are respectively arranged from top to bottom. Among them, the liquid supply system 500 is connected to the liquid outlet 101-2 of the electrolyte tank assembly 100, and is connected to the liquid inlet of the stack 400 through a water pump 111 and a liquid supply pipeline to provide electrolyte for the stack 400. After the electrolyte entering the stack 400 reacts, it flows out through the liquid outlet 101-2 of the stack 400 and returns to the liquid return port 101-1 of the electrolyte tank assembly 100 through the liquid return pipeline 600. The waste gas generated during the reaction of the stack 400 is collected in the liquid tank assembly through the liquid return pipe 600, gathered at the top of the liquid tank, and diluted and discharged through the exhaust system 800 connected to the exhaust port. The liquid supply system 500 and the liquid return pipe 600 are set on both sides, and are arranged in a flipped symmetrical manner.

[0063] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An aluminum-air battery slag-liquid separation device, characterized in that: It includes an electrolyte tank assembly, a lifting mechanism, and a slag tank assembly arranged in sequence from top to bottom, and also includes a frame located around it to provide support; The electrolyte tank assembly comprises a tank body, a pipeline for connecting the tank body and the slag tank assembly, and a valve for controlling the on-off of the pipeline; the bottom of the tank body is a conical necking structure, and a slag discharge port is provided at the bottom of the tank body, a first telescopic pipe is provided at the bottom of the slag discharge port, and the slag discharge port is connected to the first telescopic pipe and the inlet of the valve in sequence; The slag box assembly includes a hollow slag box and a slag bag detachably fixedly installed in the inner space of the slag box; the slag box includes a bottom box and two slag box covers slidably connected to the bottom box, and the slag box covers can slide to both sides to open and close the top opening of the bottom box; a second telescopic tube is arranged on the top of the slag bag, and the second telescopic tube is detachably connected to the outlet of the valve, and a one-way valve is also arranged on the second telescopic tube; The lifting mechanism comprises a lifting tray fixedly connected to the valve.

2. The aluminum-air battery slag-liquid separation device according to claim 1 is characterized in that: A window is respectively arranged on two opposite sides of the box body, and the window is detachably fixedly connected to the box body.

3. The aluminum-air battery slag-liquid separation device according to claim 2 is characterized in that: A set of fan components for heat dissipation by air cooling is respectively installed on the other two side surfaces of the box body which are opposite to each other and are not provided with windows.

4. The aluminum-air battery slag-liquid separation device according to claim 3 is characterized in that: A slag flushing pipeline is arranged at the bottom of the box body, and the slag flushing pipeline comprises a slag flushing pipeline 1, a water pump, and a slag flushing pipeline 2 which are connected in sequence. The inlet of the slag flushing pipeline 1 and the outlet of the slag flushing pipeline 2 are respectively connected to the box body, and the outlet of the slag flushing pipeline 2 faces the slag discharge port at the bottom of the box body.

5. The aluminum-air battery slag-liquid separation device according to claim 4 is characterized in that: A top liquid level sensor and a bottom liquid level sensor are arranged in the upper area of ​​the box body. The top liquid level sensor is used to monitor the maximum liquid level of the electrolyte in the box body, and the bottom liquid level sensor is used to monitor the minimum allowable liquid level of the electrolyte in the box body.

6. The aluminum-air battery slag-liquid separation device according to claim 5, characterized in that: A panel is arranged at the bottom of the frame, a guide rail is arranged on the panel, the slag box is slidably connected with the guide rail, a latch is arranged at one side of the slag box, and a fixing hole which is plugged and matched with the latch is arranged on the guide rail.

7. The aluminum-air battery slag-liquid separation device according to claim 6 is characterized in that: A notch is provided in the center of the slag box cover, a bayonet is provided at the bottom outlet of the second telescopic tube to engage with the notch, and a flange interface for clamp connection with a valve is provided at the top inlet of the second telescopic tube.

8. The aluminum-air battery slag-liquid separation device according to claim 7 is characterized in that: The lifting mechanism includes a lifting tray, a U-shaped pull rod, a connecting rod, a tray connecting block, and a fixing plate; The lifting pallet is guided and positioned by a vertical guide rail erected between the frames; the two end points of the U-shaped pull rod are T-shaped structures, the horizontal end of the T-shaped structure is respectively hinged to the fixed plates on both sides, the vertical end is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the pallet connecting block, and the pallet connecting block is fixedly connected to the lifting pallet.

9. An aluminum-air battery system, characterized in that: It comprises the aluminum-air battery slag-liquid separation device as described in any one of claims 1 to 8, and also comprises a control system, a fuel cell stack, a liquid supply system, a liquid return pipeline, and an exhaust system; the control system is installed on the top of the frame; the inlet of the liquid supply system is connected to the liquid outlet of the electrolyte tank assembly, and the outlet of the liquid supply system is connected to the liquid inlet of the fuel cell stack.

10. An aluminum-air battery system according to claim 9, characterized in that: A temperature sensor and a heater are also installed in the box, and the control system is electrically connected to the top liquid level sensor, the bottom liquid level sensor, the temperature sensor, and the heater respectively.

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