Feeding device of methanol fuel cell

Abstract

The invention discloses a feeding device of a methanol fuel cell, and relates to the field of methanol fuel cells, the feeding device comprises a liquid supply mechanism and further comprises a gas supply mechanism, the gas supply mechanism comprises a pipe I communicated with a gas inlet in the fuel cell, a fan blade is arranged in the pipe I, a shaft is arranged on the fan blade, and the shaft penetrates through the pipe I to the outside; the liquid supply mechanism comprises a second pipe and a piston push rod located in the second pipe, and a lead screw pair is arranged on the piston push rod. According to the feeding device of the methanol fuel cell, the driving piece drives the fan blades in the first pipe to rotate so as to accelerate air supply, meanwhile, the lead screw pair drives the piston push rod to push to achieve methanol liquid supply while the driving piece drives the piston push rod, the mode that fuel is supplied through a pump is replaced, and the feeding efficiency of the methanol fuel cell is improved. The fuel is provided without depending on a complex pump system, and methanol is supplied while the maximum ventilation amount is guaranteed, so that on one hand, the fuel cell is lighter, and on the other hand, the energy consumption of the fuel cell is remarkably reduced.

Description

Technical Field

[0001] The invention relates to the field of methanol fuel cells, in particular to a feeding device for a methanol fuel cell. Background Art

[0002] The operating principle of methanol fuel cells is based on an electrochemical reaction, in which methanol is oxidized into carbon dioxide and protons at the anode, while releasing electrons. The protons migrate to the cathode through the proton exchange membrane, while the electrons form an electric current through an external circuit, thereby providing electricity to the external load. After the protons reach the cathode, they combine with oxygen to form water. Therefore, in general, the supply of methanol is divided into the supply of methanol and the supply of oxidant (oxygen).

[0003] In a methanol fuel cell, methanol is generally supplied via a pump or based on the capillary breathing principle, where:

[0004] (1) The power required by the pump comes from the fuel cell itself, which consumes part of the power, and the flow rate supplied by the pump is relatively large;

[0005] (2) Although liquid supply based on the principle of capillary respiration can effectively avoid permeation caused by excessive methanol supply, there is an upper limit to the supply rate, which means that there is an upper limit to the energy efficiency of the fuel cell;

[0006] (3) Whether it is pumping or supply based on the principle of capillary breathing, there must be air pressure input upstream of the methanol supply to meet the supply demand for normal flow of methanol, which means that part of the methanol will evaporate or participate in the reaction during the supply process, resulting in unnecessary losses;

[0007] (4) During the entire operation cycle of the fuel cell, a sufficient amount of oxygen must be ensured to avoid excessive methanol that does not participate in the reaction and permeates, leading to adverse factors such as performance degradation and electrode polarization.

[0008] In order to solve the above problems, we propose a feeding device for a methanol fuel cell. Summary of the invention

[0009] [Technical issues solved]

[0010] In view of the deficiencies in the prior art, the present invention provides a feeding device for a methanol fuel cell, which has the advantages of sealed methanol supply and small flow supply, and can effectively solve the problems in the background technology.

[0011]

Technical solution

[0012] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a feeding device for a methanol fuel cell, comprising a liquid supply mechanism and a gas supply mechanism, wherein the gas supply mechanism comprises a tube 1 connected to an air inlet on the fuel cell, a fan blade is arranged inside the tube 1, a shaft is arranged on the fan blade, the shaft passes through the tube 1 to the outside, and a driving member for driving the rotation thereof is arranged at one end of the shaft located outside;

[0013] The liquid supply mechanism includes a tube 2 and a piston push rod located inside the tube. A screw pair is arranged on the piston push rod. The nut of the screw pair is fixedly connected to the piston push rod, and the screw of the screw pair is fixedly connected to the shaft and on the same axial direction of the shaft.

[0014] Preferably, the liquid supply mechanism and the gas supply mechanism are respectively connected to the methanol inlet and the air inlet on the fuel cell, the structural dimensions of the fan blades fit the tube one to the greatest extent, and the fan blades are fixedly connected to one end of the shaft, the tube one is a curved tube, and the end of the shaft away from the fan blades is penetrated by the bent end of the tube one to the outside and is dynamically sealed therewith, wherein a tube head is extended from the bent section of the tube one, and the dynamic sealing structure is located inside the tube head, thereby ensuring the sealing performance of the connection between the shaft and the tube one to the greatest extent.

[0015] Preferably, one end of the tube 1 is connected to the outside, and the other end is fixedly connected to and communicated with the air inlet portion of the fuel cell.

[0016] Preferably, the driving member is a motor, and any type of motor known to those skilled in the art, such as a servo motor or a stepper motor, may be used.

[0017] Preferably, in order to prevent the piston on the piston push rod from chemically reacting with methanol, an inert coating needs to be coated on the piston, and those skilled in the art will understand that the tube 2 should also be made of a material that is compatible with methanol.

[0018] Preferably, one end of the piston push rod away from the piston is fixedly connected to the nut on the screw pair, and one end of the screw is fixedly connected to the rotor on the driving member. The main body of the driving member is fixedly connected to the external base frame. In order to minimize the load on the screw, a bearing seat is installed between the screw and the external base frame.

[0019] Preferably, a one-way valve is connected to the portion of the tube 2 adjacent to the liquid outlet of the tube 2.

[0020] Preferably, the one-way valve only allows liquid to flow into the interior of tube two. Methanol can be filled into the interior of tube two through the one-way valve without disassembling the piston push rod. When the liquid supply mechanism is in operation, a cover should be installed on the one-way valve to prevent external air from entering tube two through the one-way valve.

[0021] Preferably, a speed change mechanism is provided between the shaft and the screw pair.

[0022] Preferably, the speed change mechanism may be any speed change mechanism known to those skilled in the art, such as a gear transmission.

[0023] Preferably, the speed change mechanism includes two conical wheels, between which a transmission wheel engaged with each other is arranged, and the transmission wheel is attached with a telescopic member for changing the position of the transmission wheel between the two conical wheels, and the telescopic section of the telescopic member is rotatably connected to the transmission wheel, one of the conical wheels is fixedly connected to the output end of the shaft or the driving member, and the other conical wheel is fixedly connected to the screw of the screw pair.

[0024] Preferably, the two conical wheels are mounted in opposite directions, and the transmission wheel is located between the two conical wheels. In order to avoid excessive load on the conical wheels and the transmission wheel, the conical wheels should be placed horizontally. In addition, those skilled in the art can understand that a bearing seat can be installed at an appropriate position to share the load.

[0025] Preferably, one conical wheel is fixedly connected to the rotor of the driving member, and the conical wheel is fixedly connected to the shaft, and the other conical wheel is fixedly connected to the end of the screw rod away from the piston push rod. The telescopic member can adopt any telescopic member for telescopic drive known to technicians in this field, such as an electric push rod, a cylinder or an oil cylinder, which is selected according to actual implementation requirements, and the main body of the telescopic member is also fixedly connected to the external base frame.

[0026] Preferably, the conical wheel and the transmission wheel can be joined in a hard joint or a friction joint. For friction joint, for example, a conical wheel made of a softer material is used, and the surfaces of the conical wheel and the transmission wheel are treated to increase the friction coefficient. For hard joint, tiny teeth with equivalent modulus are provided on the surfaces of the conical wheel and the transmission wheel.

[0027] Preferably, a filter mechanism for filtering gas and for controlling the connection state between the air supply mechanism and the external environment is provided at the air inlet portion of the air supply mechanism.

[0028] Preferably, the filtering mechanism comprises a bin, on which an air inlet and an air outlet located in the same axial direction are provided, the air outlet is connected to the air inlet portion of the tube one, at least two cylinders are arranged inside the bin, the two cylinders are a filter element and a seal element respectively, the filter element and the seal element are connected together with an external driving element for driving them to rotate around the axial direction of the bin, the distance between the axis of the filter element and the seal element and the rotor axis of the driving element is equal to the distance between the axis of the air inlet and outlet of the bin and the bin axis.

[0029] Preferably, the cylinder as the filter element is a hollow structure, in which a filter screen or filter material is arranged, and the cylinder as the sealing element is a closed structure at both ends, and sealing rings are embedded at the ends of the cylinder.

[0030] Preferably, at least two of the tubes are connected to a fixed frame, and at least two of the tubes are based on the axial ring array of the fixed frame. Because the tubes are based on the axial ring array of the fixed frame, the distribution angles between the tubes are the same, so as to better control the position rotation of the tubes.

[0031] Preferably, the cartridge is fixedly connected to the fixing frame, or is detachably connected, so that a suitable filter element can be selected according to actual implementation requirements.

[0032] Preferably, in order to increase the oxygen concentration of the gas introduced into the fuel cell, a gas cylinder containing high-concentration oxygen may be installed on the fixed frame in the same manner as a cylinder.

[0033] Preferably, two groups of liquid supply mechanisms are included, wherein one group of liquid supply mechanisms replaces the air supply mechanism for supplying air, a semipermeable membrane is arranged inside tube 2 in the liquid supply mechanism of the replacing air supply mechanism, a one-way valve is arranged at the air outlet of tube 2, and an air inlet is opened at the position of tube 2 adjacent to the air outlet, and the air inlet is also connected to the one-way valve.

[0034] Preferably, the semipermeable membrane is fixedly connected to a portion of the tube 2 adjacent to the gas outlet.

[0035]

Beneficial Effects

[0036] Compared with the prior art, the present invention provides a feeding device for a methanol fuel cell, which has the following beneficial effects:

[0037] The feeding device of the methanol fuel cell accelerates the supply of air by driving the fan blades in the tube to rotate through the driving member. At the same time, the screw rod drives the piston push rod to push the methanol liquid while the driving member is driving, replacing the fuel supply method of the pump. Since there is no need to rely on a complex pump system to provide fuel, the methanol is supplied while ensuring the maximum ventilation volume. On the one hand, the fuel cell is made lighter, and on the other hand, the energy consumption of the fuel cell itself is significantly reduced.

[0038] Furthermore, because methanol is stored inside the second tube, the second tube and the piston push rod form a closed environment, which can prevent methanol from contacting with the outside air to the greatest extent, thereby effectively reducing the possibility of methanol fuel volatilization;

[0039] In addition, because the storage conditions of methanol are as airtight as possible, the supply of methanol can be controlled more accurately to ensure the maximum utilization of methanol. On the one hand, it guarantees sufficient utilization of the fuel, and on the other hand, it is conducive to ensuring the purity of methanol to prevent additional water or other impurities from being mixed in methanol, so as to form deposits on the electrode surface and block channels during subsequent reactions, thereby ensuring the long-term stable operation of the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the structural assembly of a feeding device of a methanol fuel cell according to the present invention.

[0041] Figure 2 The present invention is a front view of a feeding device of a methanol fuel cell in a structural assembly state.

[0042] Figure 3 The figure is a schematic structural diagram of a feeding device for a methanol fuel cell according to the present invention.

[0043] Figure 4 This is a structural analysis diagram of a gas supply mechanism in a feeding device of a methanol fuel cell according to the present invention.

[0044] Figure 5 The present invention is a schematic structural diagram of a liquid supply mechanism in a feeding device of a methanol fuel cell.

[0045] Figure 6 The present invention is a schematic structural diagram of a speed change mechanism in a feeding device of a methanol fuel cell.

[0046] Figure 7 The figure is a schematic diagram of the structure of a filtering mechanism in a feeding device of a methanol fuel cell according to the present invention.

[0047] Figure 8 The figure is a partial structural schematic diagram of a filtering mechanism in a feeding device of a methanol fuel cell according to the present invention.

[0048] Fig. 9 The figure is a schematic structural diagram of a feeding device for a methanol fuel cell as a preferred embodiment of the present invention.

[0049] In the figure:

[0050] 001. Fuel cell;

[0051] 1. Air supply mechanism; 2. Liquid supply mechanism; 3. Filter mechanism;

[0052] 11. Tube 1; 12. Fan blades; 13. Shaft; 14. Driving member; 15. Screw pair; 16. Speed ​​change mechanism;

[0053] 111, pipe head;

[0054] 151. nut; 152. screw rod;

[0055] 161. conical wheel; 162. transmission wheel; 163. telescopic member;

[0056] 21. Pipe 2; 22. Piston push rod; 23. Check valve;

[0057] 211. Semipermeable membrane;

[0058] 31. Warehouse;

[0059] 311, filter;

[0060] 321, filter element; 322, sealing element;

[0061] 3211. Sealing ring. DETAILED DESCRIPTION

[0062] In order to make the technical means, creative features, objectives and functional effects of the present invention easy to understand, the present invention will be further described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] [Example 1]

[0064] In order to address the shortcomings of the existing technology, such as Figure 1 , 2 As shown, the present invention provides a feeding device for a methanol fuel cell, wherein a liquid supply mechanism 2 and an air supply mechanism 1 are respectively connected to a methanol inlet and an air inlet on a fuel cell 001 .

[0065] Specifically, Figures 3 to 5 As shown, an air supply mechanism 1 and a liquid supply mechanism 2 for a feeding device of a methanol fuel cell, the structural dimensions of the fan blade 12 fit the tube 11 to the greatest extent, and the fan blade 12 is fixedly connected to one end of the shaft 13, the tube 11 is a curved tube, and the end of the shaft 13 away from the fan blade 12 is penetrated by the bent end of the tube 11 to the outside thereof and is dynamically sealed therewith, and a tube head 111 is extended from the bent section of the tube 11, and the dynamic sealing structure is located inside the tube head 111, so as to maximize the sealing performance of the connection between the shaft 13 and the tube 11, one end of the tube 11 is connected to the outside, and the other end is fixedly connected to the air inlet portion of the fuel cell 001 and communicates therewith;

[0066] One end of the piston push rod 22 away from the piston on it is fixedly connected to the nut 151 on the screw pair 15, and one end of the screw 152 is fixedly connected to the rotor on the driving member 14. A limiting treatment is performed between the nut 151 and the screw 152 to ensure the normal transmission effect of the screw pair 15. The main body of the driving member 14 is fixedly connected to the external base frame. In order to minimize the load of the screw 152, a bearing seat is installed between the screw 152 and the external base frame.

[0067] In order to prevent the piston on the piston push rod 22 from chemically reacting with methanol, an inert coating needs to be coated on the piston, and those skilled in the art can understand that the tube 21 should also be made of a material that is compatible with methanol.

[0068] It should be noted that the present invention is a feeding device for a methanol fuel cell. Through the provision of a liquid supply mechanism 2, during the use of the methanol fuel cell, the fan blades 12 are driven by the driving member 14 to rotate inside the tube 11, so as to drive the air inside the tube 11 to flow quickly to the fuel cell 001, thereby realizing continuous supply of air.

[0069] At the same time, the shaft 13 extending from the fan blade 12 to the outside of the tube 11 and connected to the driving member 14 drives the screw 152 on the screw pair 15 to rotate. Since the nut 151 is restricted by the outside and can only slide but cannot rotate relative to the screw 152, during the rotation of the screw 152, the nut 151 slides relative to the screw 152. As a result, the nut 151 drives the piston push rod 22 to slide inside the tube 21, thereby realizing the supply of methanol inside the tube 21.

[0070] It is worth mentioning that the fan blades 12 in the tube 11 are driven by the driving member 14 to rotate to accelerate the supply of air. At the same time, the piston push rod 22 is driven by the screw pair 15 to push the methanol liquid supply while the driving member 14 is driving, replacing the fuel supply method of the pump. Since there is no need to rely on a complex pump system to provide fuel, methanol is supplied while ensuring the maximum ventilation volume. On the one hand, the fuel cell 001 is made lighter, and on the other hand, the energy consumption of the fuel cell 001 itself is significantly reduced.

[0071] Furthermore, because the methanol is stored inside the second tube 21, the second tube 21 and the piston push rod 22 form a closed environment, which prevents the methanol from contacting with the external air to the greatest extent, so as to effectively reduce the possibility of methanol fuel volatilization;

[0072] In addition, because the storage conditions of methanol are as airtight as possible, the supply of methanol can be controlled more accurately to ensure the maximum utilization of methanol. On the one hand, it guarantees sufficient utilization of the fuel, and on the other hand, it is conducive to ensuring the purity of methanol to prevent additional water or other impurities from being mixed in methanol, so as to form deposits on the electrode surface and block the channel during subsequent reactions, thereby ensuring the long-term stable operation of fuel cell 001.

[0073] Among them, those skilled in the art can understand that the rotation speed of the driving member 14 and the structural parameters of the screw pair 15 are set according to the actual implementation requirements. As an ideal operating state, through reasonable parameter settings, the supply of methanol and the supply of air can be linearly consistent to the greatest extent, so as to ensure the internal reaction stability of the fuel cell 001;

[0074] The driving member 14 is a motor, and can be any type of motor known to those skilled in the art, such as a servo motor or a stepper motor.

[0075] As a preferred embodiment, a one-way valve 23 is connected to the portion of the tube 21 adjacent to the liquid outlet of the tube 21. The one-way valve 23 only allows liquid to enter the interior of the tube 21. Methanol can be filled into the interior of the tube 21 through the one-way valve 23 without disassembling the piston push rod 22. When the liquid supply mechanism 2 is in operation, a cover should be installed on the one-way valve 23 to prevent external air from entering the tube 21 through the one-way valve 23.

[0076] [Example 2]

[0077] Based on the above-mentioned embodiment 1, since the simultaneous supply of air and methanol is achieved through a single driving member 14, when there is an excessive supply of methanol or at the end of the reaction, in order to avoid excessive methanol penetration, the methanol should be supplied less or stopped at this time. On the contrary, the air supply should be increased so that there are enough oxygen and methanol to participate in the internal reaction of the fuel cell 001. At this time, the supply speeds of the liquid supply mechanism 2 and the gas supply mechanism 1 should not continue to maintain linear consistency. When the supply speed of the gas supply mechanism 1 remains unchanged, the supply speed of the liquid supply mechanism 2 needs to be adjusted. For this reason, this embodiment is proposed:

[0078] like Figure 3 As shown, a gas supply mechanism 1 and a liquid supply mechanism 2 for a feeding device of a methanol fuel cell are provided with a speed change mechanism 16 between a shaft 13 and a screw pair 15; the speed change mechanism 16 can adopt any speed change mechanism known to technicians in this field, such as a gear transmission.

[0079] Specifically, Figure 6As shown, a speed change mechanism 16 between an air supply mechanism 1 and a liquid supply mechanism 2 for a feeding device of a methanol fuel cell, the speed change mechanism 16 comprises two conical wheels 161, a transmission wheel 162 respectively engaged with the two conical wheels 161 is arranged between the two conical wheels 161, the transmission wheel 162 is attached with a telescopic member 163 for changing the position of the transmission wheel 162 between the two conical wheels 161, and the telescopic section of the telescopic member 163 is rotatably connected to the transmission wheel 162, one conical wheel 161 is fixedly connected to the output end of the shaft 13 or the driving member 14, and the other conical wheel 161 is fixedly connected to the screw 152 of the screw pair 15;

[0080] The two conical wheels 161 are arranged in opposite directions, and the transmission wheel 162 is located between the two conical wheels 161; one conical wheel 161 is fixedly connected to the rotor of the driving member 14, and this conical wheel 161 is fixedly connected to the shaft 13, and the other conical wheel 161 is fixedly connected to the end of the screw rod 152 away from the piston push rod 22.

[0081] In order to prevent the conical wheel 161 and the transmission wheel 162 from being overloaded, the conical wheel 161 should be placed horizontally. In addition, those skilled in the art can understand that a bearing seat can be installed at an appropriate position to distribute the load.

[0082] The telescopic member 163 can be any telescopic member for telescopic drive known to those skilled in the art, such as an electric push rod, a pneumatic cylinder or an oil cylinder, which can be selected according to actual implementation requirements, and the main body of the telescopic member 163 is also fixedly connected to the external base frame;

[0083] The conical wheel 161 and the transmission wheel 162 can be joined in a hard joint or a friction joint. For friction joint, for example, the conical wheel 161 is made of a softer material, and the surfaces of the conical wheel 161 and the transmission wheel 162 are treated to increase the friction coefficient. For hard joint, tiny teeth with equivalent modulus are provided on the surfaces of the conical wheel 161 and the transmission wheel 162.

[0084] It should be noted that the present invention is a feeding device for a methanol fuel cell. Through the speed change mechanism 16, if the supply speed of the liquid supply mechanism 2 needs to be adjusted, the transmission wheel 162 is driven to move between the two conical wheels 161 through the telescopic member 163. As the position of the transmission wheel 162 after movement is different, the diameters of the two conical wheels 161 involved in the transmission are also different, thereby realizing the adjustment and change of the supply speed of the liquid supply mechanism 2.

[0085] like Figure 6In the structural state shown, when the telescopic member 163 drives the transmission wheel 162 to move toward the end away from the driving member 14, the transmission ratio between the conical wheel 161 on the driving member 14 and the conical wheel 161 on the screw rod 152 gradually decreases, and at this time, the position where the conical wheel 161 on the screw rod 152 participates in the transmission is located at the end with a relatively large diameter. Therefore, the rotation speed of the conical wheel 161 on the screw rod 152 slows down, so that the speed at which the nut 151 drives the piston push rod 22 to move slows down;

[0086] If the supply of methanol or air needs to be accelerated, those skilled in the art will appreciate that, in addition to adjusting the speed change mechanism 16 accordingly according to the above steps, the rotation speed of the drive member 14 may also need to be adjusted.

[0087] If the supply of methanol needs to be stopped, and some methanol still remains in the fuel cell 001, air still needs to be supplied to participate in the reaction, so that all the methanol in the fuel cell 001 is consumed. Figure 6 In the structural state shown, the transmission wheel 162 is driven by the telescopic member 163 to move in the direction of the arrow and to the position of the arrow. At this position, the transmission wheel 162 is disengaged from the engagement transmission with its conical wheel 161. Therefore, only the conical wheel 161 connected to the driving member 14 rotates, and the conical wheel 161 connected to the screw 152 stops rotating, thereby realizing the cessation of methanol supply without affecting the continuous supply of air.

[0088] It is worth mentioning that by installing a speed change mechanism 16 between the air supply mechanism 1 and the liquid supply mechanism 2, one conical wheel 161 is connected to the shaft 13, and the other conical wheel 161 is connected to the screw 152. The transmission ratio of the shaft 13 and the screw 152 is changed by changing the position of the transmission wheel 162. In this way, the liquid supply speed of the liquid supply mechanism 2 is changed without changing the rotation speed of the shaft 13 to meet different liquid supply needs, especially at the end of the reaction or when there is too much methanol, the supply of methanol is reduced or stopped while maintaining a continuous supply of air, so that the supply rate of methanol can be adjusted in real time according to actual needs, and a smooth transition can be achieved even during the operation of the system. It is of great significance to maintain the optimal stoichiometric ratio and can avoid efficiency loss or safety hazards caused by excessive supply of methanol.

[0089] The moving direction of the transmission wheel 162 may also be the opposite. Figure 6The methanol supply can also be stopped by moving in the direction of the arrow shown until it disengages from one of the conical wheels 161. The transmission wheel 162 preferably moves in the direction of the arrow. In this direction, as the transmission wheel 162 continues to move, the supply speed of the liquid supply mechanism 2 gradually decreases, and when the transmission wheel 162 disengages from one of the conical wheels 161, it stops directly, which is more in line with design common sense.

[0090] [Example 3]

[0091] Considering that the use environment of methanol batteries is different, the air supply requirements are different. For example, when there is too much moisture in the air, the proton exchange membrane in the fuel cell 001 may be over-humidified, thereby causing irreversible damage to the proton exchange membrane. Therefore, based on any of the above embodiments, this embodiment is proposed:

[0092] like Figure 2 , 3 As shown, the present invention provides a feeding device for a methanol fuel cell, wherein a filter mechanism 3 for filtering gas and controlling the connection state between the gas supply mechanism 1 and the external environment is provided at the air inlet portion of the gas supply mechanism 1 .

[0093] Specifically, Figure 7 , 8 As shown, a filter mechanism 3 for a feeding device of a methanol fuel cell, the filter mechanism 3 includes a bin 31, an air inlet and an air outlet located in the same axial direction are provided on the bin 31, the air outlet is connected to the air inlet portion of the pipe 11, at least two cylinders are arranged inside the bin 31, the two cylinders are a filter 321 and a seal 322, the filter 321 and the seal 322 are connected together with a drive member 14 for driving them to rotate around the axial direction of the bin 31, the distance between the axis of the filter 321 and the seal 322 and the rotor axis of the drive member 14 is equal to the distance between the axis of the air inlet and outlet of the bin 31 and the axis of the bin 31;

[0094] The cylinder as the filter element 321 is a hollow structure, in which a filter screen or filter material is arranged, and the cylinder as the sealing element 322 is a closed structure at both ends, and sealing rings 3211 are embedded at the ends of the cylinder.

[0095] It should be noted that the present invention is a feeding device for a methanol fuel cell. Through the filter mechanism 3, if it is necessary to filter the air introduced, according to actual usage needs, the driving member 14 on the bin 31 drives the filter element 321 and the sealing member 322 located inside it to rotate, so that the filter element 321 is connected to the gas inlet and outlet on the bin 31. In this way, air enters from the inlet of the bin 31, is filtered through the filter element 321, and then is discharged through the outlet.

[0096] When the fuel cell 001 is not in use, in order to prevent the air inlet of the fuel cell 001 from being exposed to the external environment for a long time, which may cause oxidation or other forms of chemical changes in sensitive materials in the fuel cell stack, it is necessary to drive the driving member 14 to drive the seal 322 to rotate around the axial direction of the bin 31 to the inlet and outlet positions on the bin 31, so that the two ends of the seal 322 are in a sealed structural state, so that the bin 31 is not connected to the external environment.

[0097] It is worth mentioning that by installing at least two cylinders inside the bin 31, one cylinder is used as a filter element 321, and the other cylinder is used as a seal 322. The cylinder used as the filter element 321 can select filter materials according to actual implementation needs. During the use of the fuel cell 001, the cylinder used as the filter element 321 can filter the supplied air. When the fuel cell 001 is not in use, the seal 322 is rotated to the air inlet and outlet on the bin 31, so that the bin 31 is in a non-connected state, which can effectively avoid oxidative corrosion caused by continuous entry of external air into the interior of the fuel cell 001.

[0098] As a preferred embodiment, at least two cartridges are connected to a fixed frame, and at least two cartridges are arranged in an annular array based on the axis of the fixed frame. Because the cartridges are arranged in an annular array based on the axis of the fixed frame, the distribution angles between the cartridges are the same, so that the position rotation of the cartridges can be better controlled. The cartridges are fixedly connected to the fixed frame, or are detachably connected, so that a suitable filter element 321 can be selected according to actual implementation requirements.

[0099] In order to increase the oxygen concentration of the gas entering the fuel cell 001, a gas cylinder containing high-concentration oxygen can be installed on the fixed frame in the same manner as a cylinder;

[0100] A filter 311 may also be installed at the air inlet of the bin 31 to block external dust.

[0101] As a preferred embodiment, in order to make the oxygen content of the air entering the fuel cell 001 higher under the premise of the same flow rate, as Fig. 9 As shown, it includes two groups of liquid supply mechanisms 2, one of which replaces the air supply mechanism 1 for supplying air, and a semipermeable membrane 211 is arranged inside the second tube 21 in the liquid supply mechanism 2 that replaces the air supply mechanism 1, a one-way valve 23 is arranged at the air outlet of the second tube 21, and an air inlet is opened at the position adjacent to the air outlet on the second tube 21, and the air inlet is also connected to the one-way valve 23; the semipermeable membrane 211 is fixedly connected to the position adjacent to the air outlet in the second tube 21.

[0102] It should be noted that the structural principle of the liquid supply mechanism 2 is adopted to replace the gas supply mechanism 1. The air in the tube 21 is pushed by the piston push rod 22 for pressurized transportation, so that the air in the tube 21 passes through the semipermeable membrane 211 to obtain air with a higher oxygen concentration. In this way, there are more active substances on the cathode side to participate in the reaction, so as to effectively reduce the internal resistance of the battery and reduce the energy waste caused by ohmic loss.

[0103] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed for protection.

Claims

1. A feeding device for a methanol fuel cell, comprising a liquid feeding mechanism (2), characterized in that: It also includes an air supply mechanism (1), the air supply mechanism (1) including a tube (11) connected to an air inlet on the fuel cell (001), a fan blade (12) is arranged inside the tube (11), a shaft (13) is arranged on the fan blade (12), the shaft (13) passes through the tube (11) to the outside, and a driving member (14) for driving the shaft (13) to rotate is arranged at one end of the shaft (13) located outside; The liquid supply mechanism (2) comprises a tube (21) and a piston push rod (22) located inside the tube, a screw pair (15) is arranged on the piston push rod (22), a nut (151) of the screw pair (15) is fixedly connected to the piston push rod (22), and the screw (152) of the screw pair (15) is fixedly connected to the shaft (13) and is on the same axial direction of the shaft (13).

2. A feeding device for a methanol fuel cell according to claim 1, characterized in that: A one-way valve (23) is connected to the portion of the second tube (21) adjacent to the liquid outlet of the second tube (21).

3. A feeding device for a methanol fuel cell according to claim 1, characterized in that: A speed change mechanism (16) is provided between the shaft (13) and the screw pair (15).

4. A feeding device for a methanol fuel cell according to claim 3, characterized in that: The speed change mechanism (16) comprises two conical wheels (161), a transmission wheel (162) respectively engaged with the two conical wheels (161) is arranged between the two conical wheels (161), a telescopic member (163) is attached to the transmission wheel (162) for changing the position of the transmission wheel (162) between the two conical wheels (161), and the telescopic section of the telescopic member (163) is rotatably connected to the transmission wheel (162), one conical wheel (161) is fixedly connected to the output end of the shaft (13) or the driving member (14), and the other conical wheel (161) is fixedly connected to the screw (152) of the screw pair (15).

5. The feeding device of a methanol fuel cell according to claim 1, characterized in that: A filtering mechanism (3) for filtering gas and for controlling the connection state between the gas supply mechanism (1) and the external environment is provided at the air inlet portion of the gas supply mechanism (1).

6. A feeding device for a methanol fuel cell according to claim 5, characterized in that: The filtering mechanism (3) comprises a bin (31), an air inlet and an air outlet located in the same axial direction are provided on the bin (31), the air outlet is connected to the air inlet portion of the tube (11), at least two cylinders are arranged inside the bin (31), the two cylinders are a filter element (321) and a sealing element (322), the filter element (321) and the sealing element (322) are connected to a driving element (14) for driving them to rotate around the axial direction of the bin (31), and the distance between the axis of the filter element (321) and the sealing element (322) and the rotor axis of the driving element (14) is equal to the distance between the axis of the air inlet and the air outlet of the bin (31) and the axis of the bin (31).

7. A feeding device for a methanol fuel cell according to claim 6, characterized in that: At least two of the tubes are commonly connected to a fixing frame, and at least two of the tubes are arranged in a circular array based on the axis of the fixing frame.

8. The feeding device of a methanol fuel cell according to claim 1, characterized in that: The invention comprises two groups of liquid supply mechanisms (2), wherein one group of the liquid supply mechanisms (2) replaces the air supply mechanism (1) for supplying air, a semipermeable membrane (211) is arranged inside the second tube (21) in the liquid supply mechanism (2) of the replacing air supply mechanism (1), a one-way valve (23) is arranged at the air outlet of the second tube (21), and an air inlet is opened at the position adjacent to the air outlet on the second tube (21), and the air inlet is also connected to the one-way valve (23).

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