Electrochemical hydrogen pump device for step-by-step pressurization and purification
By setting alternate parts in the stack body of the electrochemical hydrogen pump device, step by step boosting and purification of hydrogen by using membrane electrodes and grid plates, the problems of difficult hydrogen purity and pressure, high floor area and cost in the prior art are solved, and efficient and low-cost hydrogen treatment is achieved.
Patent Information
- Application Number
- CN202420366965.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-02-26
AI Technical Summary
The existing single-time electrochemical hydrogen pumps are difficult to meet the requirements of hydrogen purity and pressure. Multiple single-time compression electrochemical hydrogen pumps cover a high floor area and cost, and have a high cost pressure for use.
An electrochemical hydrogen pump device with step-by-step boost and purification is designed. By setting alternate parts in the stacking body, and using alternately arranged membrane electrodes and grid plates, step-by-step boost and purification of hydrogen is achieved.
The step-by-step boost and purification of hydrogen is achieved in the same electrochemical pump, which improves the purity and pressure of hydrogen, reduces the floor area and use cost, and solves the problems of difficult hydrogen purity and pressure, high floor area and cost in the prior art.
Smart Images
Figure CN222690704U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fuel cells, in particular to an electrochemical hydrogen pump device for step-by-step pressurization and purification. Background Art
[0002] Faced with the increasingly stringent exhaust emission standards in China and even the world and the future energy crisis, major automobile manufacturers are developing low-emission new energy technologies to adapt to this development trend. Among them, fuel cell vehicles are one of the areas that major automobile companies are vigorously developing. Fuel cells have many advantages such as cleanliness and high efficiency, and are attracting more and more attention.
[0003] Hydrogen is the main fuel for fuel cells. At present, the market has certain requirements for the purity and pressure of hydrogen used. The purity and pressure of hydrogen compressed by the existing single-shot electrochemical hydrogen pumps are difficult to meet the requirements; for multiple single-shot electrochemical hydrogen pumps, the required floor space and costs increase proportionally, the cost pressure of use is relatively large, and it is difficult to popularize and apply. Utility Model Content
[0004] Based on this, an embodiment of the utility model provides an electrochemical hydrogen pump device with step-by-step pressurization and purification, aiming to solve the problems that the purity and pressure of hydrogen compressed by the existing single electrochemical hydrogen pump are difficult to meet the requirements of use, the space and cost required for multiple single-compression electrochemical hydrogen pumps are high, and the cost pressure of use is relatively high.
[0005] To achieve the above-mentioned purpose, the embodiment of the utility model provides an electrochemical hydrogen pump device for step-by-step pressurization and purification, comprising a first end plate (i.e., an upper end plate), a stacking body, a second end plate (i.e., a lower end plate), a switch valve, and a pressure gauge; the first end plate, the stacking body, and the second end plate are stacked in sequence, the first end plate and the second end plate are fixedly connected by a plurality of screws, and the plurality of screws are evenly arranged on the outside of the stacking body;
[0006] The switch valve is arranged on the side of the second end plate away from the stacking body, and the switch valve is connected to the stacking body; the pressure gauge is arranged on the side of the second end plate away from the stacking body, and the pressure gauge is connected to the stacking body.
[0007] As a preferred embodiment, the first end plate is provided with a hydrogen inlet and a hydrogen outlet which are independent of each other; the hydrogen inlet and the hydrogen outlet are respectively connected to the stacking body.
[0008] As a preferred embodiment, with the direction perpendicular to the screw as the longitudinal section, the section area of the first end plate is equal to the section area of the second end plate; the section area of the first end plate is larger than the section area of the stacking body.
[0009] As a preferred embodiment, the stacking body includes a first insulating plate, a stacking portion, and a second insulating plate stacked in sequence, the first insulating plate abuts against the first end plate, and the second insulating plate abuts against the second end plate.
[0010] As a preferred embodiment, a first through hole adapted to the switch valve is provided on the second insulating plate, and the switch valve passes through the second end plate and the first through hole in sequence and is connected to the interior of the stacking body.
[0011] As a preferred embodiment, a second through hole matched with the pressure gauge is provided on the second insulating plate, and the pressure gauge passes through the second end plate and the second through hole in sequence and is connected with the interior of the stacking body.
[0012] As a preferred embodiment, the stacking portion includes an air intake tail plate, an anode plate, an alternating portion and a cathode plate which are stacked in sequence, the air intake tail plate is arranged close to the first insulating plate, and the cathode plate is arranged close to the second insulating plate;
[0013] The alternating part comprises a plurality of membrane electrodes and grid plates which are arranged alternately; the anode plate is arranged close to the membrane electrode at one end of the alternating part, and the cathode plate is arranged close to the grid plate at the other end of the alternating part.
[0014] As a preferred embodiment, the air intake tail plate and the first insulating plate are both provided with a gas inlet adapted to the hydrogen inlet, and the hydrogen inlet is connected to the stacking portion through the gas inlet.
[0015] As a preferred embodiment, the air intake tail plate and the first insulating plate are both provided with gas outlets adapted to the hydrogen outlet, and the hydrogen outlet is connected to the stacking portion through the gas outlet.
[0016] As a preferred embodiment, support columns are provided on the end corners of the side of the second end plate away from the second insulating plate. By providing the support columns, the device of the present application can be supported and positioned.
[0017] When using the device of the present application, the mixed gas to be purified and pressurized (i.e., the mixed gas containing hydrogen) enters from the hydrogen inlet of the first end plate, and the mixed gas reaches the membrane electrode area after passing through the air inlet tail plate and the anode plate. The unreacted gas flows out from the hydrogen outlet of the first end plate, and the gas reacted in the membrane electrode area passes through the grid plate and enters the next membrane electrode for pressurization and purification until the target pressure and purity are reached; the purified pressure can be displayed by the pressure gauge on the second end plate. The purity of the hydrogen after multi-stage purification by the device of the present application is higher than the purity of the hydrogen purified in the first stage.
[0018] The present application forms a place for step-by-step pressurization and purification of hydrogen by arranging an alternating part in the stacked body, so that the alternating part is composed of an alternately arranged membrane electrode and a grid plate, and can realize step-by-step pressurization and purification of hydrogen in the same electrochemical pump. The present application has a simple structure, a small footprint, and a low cost of use. It can effectively solve the problems that the purity and pressure of hydrogen compressed by the existing single electrochemical hydrogen pump are difficult to meet the use requirements, the footprint and cost required for multiple single-compression electrochemical hydrogen pumps are high, and the cost pressure of use is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0020] Figure 1 This is a schematic diagram of the overall structure of an electrochemical hydrogen pump device for step-by-step pressurization and purification according to an embodiment of the utility model;
[0021] Figure 2 for Figure 1 A rear view of an electrochemical hydrogen pump device for step-by-step pressurization and purification;
[0022] Figure 3 for Figure 1 Schematic diagram of the explosion structure of the electrochemical hydrogen pump device for step-by-step pressurization and purification;
[0023] Figure 4 for Figure 3 A schematic diagram of the exploded structure of the stacking part;
[0024] Figure 5 for Figure 4 Schematic diagram of the structure of the grid panel.
[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.
[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0031] Specifically, Figures 1 to 3 As shown, an embodiment of the utility model provides an electrochemical hydrogen pump device for step-by-step pressurization and purification, comprising a first end plate 10 (i.e., an upper end plate), a stacking body 20, a second end plate 30 (i.e., a lower end plate), a switch valve 40, and a pressure gauge 50; the first end plate 10, the stacking body 20, and the second end plate 30 are stacked in sequence, and the first end plate 10 and the second end plate 30 are fixedly connected by a plurality of screws 60, and the plurality of screws 60 are evenly arranged on the outside of the stacking body 20;
[0032] The switch valve 40 is arranged on the side of the second end plate 30 away from the stacking body 20, and the switch valve 40 is connected to the stacking body 20; the pressure gauge 50 is arranged on the side of the second end plate 30 away from the stacking body 20, and the pressure gauge 50 is connected to the stacking body 20.
[0033] As a preferred embodiment, the first end plate 10 is provided with a hydrogen inlet 11 and a hydrogen outlet 12 which are independent of each other; the hydrogen inlet 11 and the hydrogen outlet 12 are respectively connected to the stacking body 20 .
[0034] As a preferred embodiment, with the direction perpendicular to the screw 60 as the longitudinal section, the section area of the first end plate 10 is equal to the section area of the second end plate 30 ; the section area of the first end plate 10 is larger than the section area of the stacking body 20 .
[0035] As a preferred embodiment, the stacking body 20 includes a first insulating plate 21 , a stacking portion 22 , and a second insulating plate 23 stacked in sequence. The first insulating plate 21 abuts against the first end plate 10 , and the second insulating plate 23 abuts against the second end plate 30 .
[0036] As a preferred embodiment, the second insulating plate 23 is provided with a first through hole (not marked in the figure) adapted to the switch valve 40, and the switch valve 40 passes through the second end plate 30 and the first through hole in sequence and is connected to the interior of the stacking body 20. The switch valve 40 can be opened to exhaust gas, and the pressure gauge shows a pressure of 0 at this time; the switch valve 40 can be closed to increase the internal air pressure, and the pressure gauge will show the internal pressure value at this time.
[0037] As a preferred embodiment, a second through hole (not marked in the figure) compatible with the pressure gauge 50 is provided on the second insulating plate 23, and the pressure gauge 50 passes through the second end plate 30 and the second through hole in sequence and is connected to the interior of the stacking body 20.
[0038] As a preferred embodiment, Figures 4 to 5 As shown, the stacking portion 22 includes an air intake tail plate 221, an anode plate 222, an alternating portion 223 and a cathode plate 224 which are stacked in sequence, the air intake tail plate 221 is arranged close to the first insulating plate 21, and the cathode plate 224 is arranged close to the second insulating plate 23;
[0039] The alternating portion 223 includes a plurality of membrane electrodes A and grid plates B that are alternately arranged; the anode plate 222 is arranged near the membrane electrode A at one end of the alternating portion 223 , and the cathode plate 224 is arranged near the grid plate B at the other end of the alternating portion 223 .
[0040] In the embodiment of the present application, the alternating portion 223 is provided with 5 groups of alternately arranged membrane electrodes A and grid plates B. In other embodiments, according to actual use needs, the number of groups of membrane electrodes A and grid plates B can also be set to 3 groups, or 6 groups, or 8 groups or even more groups.
[0041] As a preferred embodiment, the air intake tail plate 221 and the first insulating plate 21 are both provided with a gas inlet C adapted to the hydrogen inlet 11 , and the hydrogen inlet 11 is connected to the stacking portion 22 via the gas inlet C.
[0042] As a preferred embodiment, the air intake tail plate 221 and the first insulating plate 21 are both provided with a gas outlet D adapted to the hydrogen outlet 12 , and the hydrogen outlet 12 is connected to the stacking portion 22 via the gas outlet D.
[0043] As a preferred embodiment, support columns 70 are provided on the end corners of the side of the second end plate 30 away from the second insulating plate 23. By providing the support columns 70, the device of the present application can be supported and positioned.
[0044] When using the device of the present application, the mixed gas to be purified and pressurized (i.e., the mixed gas containing hydrogen) enters from the hydrogen inlet of the first end plate, and the mixed gas reaches the membrane electrode area after passing through the air inlet tail plate and the anode plate. The unreacted gas flows out from the hydrogen outlet of the first end plate, and the gas reacted in the membrane electrode area passes through the grid plate and enters the next membrane electrode for pressurization and purification until the target pressure and purity are reached; the purified pressure can be displayed by the pressure gauge on the second end plate. The purity of the hydrogen after multi-stage purification by the device of the present application is higher than the purity of the hydrogen purified in the first stage.
[0045] The present application forms a place for step-by-step pressurization and purification of hydrogen by arranging an alternating part in the stacked body, so that the alternating part is composed of an alternately arranged membrane electrode and a grid plate, and can realize step-by-step pressurization and purification of hydrogen in the same electrochemical pump. The present application has a simple structure, a small footprint, and a low cost of use. It can effectively solve the problems that the purity and pressure of hydrogen compressed by the existing single electrochemical hydrogen pump are difficult to meet the use requirements, the footprint and cost required for multiple single-compression electrochemical hydrogen pumps are high, and the cost pressure of use is relatively high.
[0046] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. An electrochemical hydrogen pump device for step-by-step pressurization and purification, characterized in that: The invention comprises a first end plate, a stacking body, a second end plate, a switch valve and a pressure gauge; the first end plate, the stacking body and the second end plate are stacked in sequence, the first end plate and the second end plate are fixedly connected by a plurality of screws, and the plurality of screws are evenly arranged on the outside of the stacking body; The switch valve is arranged on the side of the second end plate away from the stacking body, and the switch valve is connected to the stacking body; the pressure gauge is arranged on the side of the second end plate away from the stacking body, and the pressure gauge is connected to the stacking body.
2. The electrochemical hydrogen pump device for step-by-step pressurization and purification according to claim 1, characterized in that: The first end plate is provided with a hydrogen inlet and a hydrogen outlet which are independent of each other; the hydrogen inlet and the hydrogen outlet are respectively connected to the stacking body.
3. The electrochemical hydrogen pump device for step-by-step pressurization and purification according to claim 1, characterized in that: Taking the direction perpendicular to the screw as the longitudinal section, the section area of the first end plate is equal to the section area of the second end plate; the section area of the first end plate is larger than the section area of the stacking body.
4. The electrochemical hydrogen pump device for step-by-step pressurization and purification according to claim 2, characterized in that: The stacking body includes a first insulating plate, a stacking portion, and a second insulating plate stacked in sequence. The first insulating plate abuts against the first end plate, and the second insulating plate abuts against the second end plate.
5. The electrochemical hydrogen pump device for step-by-step pressurization and purification according to claim 4, characterized in that: The second insulating plate is provided with a first through hole adapted to the switch valve, and the switch valve passes through the second end plate and the first through hole in sequence and is connected with the interior of the stacking body.
6. The electrochemical hydrogen pump device for step-by-step pressurization and purification according to claim 5, characterized in that: The second insulating plate is provided with a second through hole adapted to the pressure gauge, and the pressure gauge passes through the second end plate and the second through hole in sequence and is connected with the interior of the stacking body.
7. The electrochemical hydrogen pump device for step-by-step pressurization and purification according to claim 6, characterized in that: The stacking part includes an air intake tail plate, an anode plate, an alternating part and a cathode plate which are stacked in sequence, the air intake tail plate is arranged close to the first insulating plate, and the cathode plate is arranged close to the second insulating plate; The alternating part comprises a plurality of membrane electrodes and grid plates which are arranged alternately; the anode plate is arranged close to the membrane electrode at one end of the alternating part, and the cathode plate is arranged close to the grid plate at the other end of the alternating part.
8. The electrochemical hydrogen pump device for step-by-step pressurization and purification according to claim 7, characterized in that: The air intake tail plate and the first insulating plate are both provided with a gas inlet matched with the hydrogen inlet, and the hydrogen inlet is connected to the stacking part through the gas inlet.
9. The electrochemical hydrogen pump device for step-by-step pressurization and purification according to claim 8, characterized in that: The air intake tail plate and the first insulating plate are both provided with a gas outlet adapted to the hydrogen outlet, and the hydrogen outlet is connected to the stacking portion through the gas outlet.
10. The electrochemical hydrogen pump device for step-by-step pressurization and purification according to claim 4, characterized in that: Support columns are provided on the end corners of the side surface of the second end plate away from the second insulating plate.