Electrochemical hydrogen pump device capable of realizing single-stage and step-by-step pressurization
By setting the first exhaust hole and the second exhaust hole in the electrochemical hydrogen pump device, and combining different core forms, single-stage and step-by-step boost purification is achieved, solving the problem that existing hydrogen pumps cannot achieve single-stage and step-by-step compression at the same time, providing flexibility and cost-effectiveness.
Patent Information
- Application Number
- CN202422149470.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-03
AI Technical Summary
Existing electrochemical hydrogen pumps cannot achieve single-stage compression and step-by-step compression on the same device, resulting in insufficient response speed and purity.
An electrochemical hydrogen pump device including a first end plate, a stacked body and a second end plate is designed. By providing a first exhaust hole and a second exhaust hole on the second insulating plate, combined with different core forms, single-stage and step-by-step boost purification is achieved, a screw is fixedly connected, and a switching valve and a pressure gauge are equipped to control pressure.
It has achieved free selection of single-stage or step-by-step boosting purification according to needs, with a simple structure, small footprint and low cost, which solves the problem that existing hydrogen pumps cannot achieve single-stage and step-by-step compression at the same time.
Smart Images
Figure CN223140800U_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 capable of realizing single-stage and step-by-step pressurization. Background Technique
[0002] Facing the increasingly strict exhaust emission standards in China and even the world today and the future energy crisis, major automobile manufacturers are all researching and developing new energy technologies with low emissions to adapt to this development trend. Among them, fuel cell vehicles are one of the fields that major automobile manufacturers are vigorously researching and developing. Fuel cells have many advantages such as cleanliness and high efficiency, and have received more and more attention.
[0003] Hydrogen is the main fuel of fuel cells. At present, there are certain requirements for the purity and pressure of the hydrogen used in the market. The existing single-stage hydrogen pump and step-by-step electrochemical hydrogen pump compression have their own advantages in purity and pressure: the single-stage hydrogen pump has a fast compression response speed, but affected by the proton membrane, the pressure difference on both sides generally needs to be controlled at about 3 MPa, and it is difficult to achieve a higher degree of hydrogen compression; although the step-by-step electrochemical hydrogen pump can achieve a higher degree of hydrogen compression through pressure difference control and the compressed purity is higher, there are problems such as slow response speed. Therefore, for the existing electrochemical hydrogen pump, it is impossible to achieve single-stage compression and step-by-step compression on the same device at the same time. Content of the Utility Model
[0004] Based on this, the embodiment of the utility model provides an electrochemical hydrogen pump device capable of realizing single-stage and step-by-step pressurization, aiming to solve problems such as that the existing electrochemical hydrogen pump cannot achieve single-stage compression and step-by-step compression on the same device at the same time.
[0005] To achieve the above object, the embodiment of the utility model provides an electrochemical hydrogen pump device capable of realizing single-stage and step-by-step pressurization, including a first end plate (i.e., the upper end plate), a stacked body and a second end plate (i.e., the lower end plate); the first end plate, the stacked body and the second end plate are stacked and arranged in sequence, and the first end plate and the second end plate are fixedly connected by several screw rods, and the several screw rods are uniformly arranged outside the stacked body;
[0006] The stacked body includes a first insulating plate, a stacked part 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;
[0007] A sealing groove is arranged on the side surface of the second insulating plate close to the second end plate, and two first exhaust holes are respectively arranged at both ends inside the sealing groove; at least two second exhaust holes are arranged between the two first exhaust holes, and the two second exhaust holes are symmetrically arranged.
[0008] As a preferred embodiment, the two first exhaust holes are symmetrically arranged; both the first exhaust hole and the second exhaust hole penetrate through the second insulating plate.
[0009] As a preferred embodiment, the stacking part includes a first current collector plate, a stack core, and a second current collector plate stacked in sequence. The first current collector plate abuts against the first insulating plate, and the second current collector plate abuts against the second insulating plate.
[0010] As a preferred embodiment, the first exhaust hole is communicated with the stack core; alternatively, the second exhaust hole is communicated with the stack core.
[0011] As a preferred embodiment, the stack core is communicated with the first exhaust hole; the stack core includes a first anode tail plate, a first anode plate, a first stack core body, a first cathode plate, and a first cathode tail plate stacked in sequence; the first stack core body includes several first membrane electrodes and several step-by-step pressure increasing plates stacked, the first membrane electrodes and the step-by-step pressure increasing plates are alternately arranged, and both ends of the first stack core body are first membrane electrodes. Through this stack core, step-by-step pressure increasing and purification of hydrogen can be achieved.
[0012] As a preferred embodiment, the stack core is communicated with the second exhaust hole; the stack core includes a second anode tail plate, a second stack core body, and a second cathode tail plate stacked in sequence; the second stack core body includes several second anode plates, several second membrane electrodes, and several second cathode plates stacked, and the second anode plates, the second membrane electrodes, and the second cathode plates are stacked in sequence.
[0013] As a preferred embodiment, one end of the second stack core body close to the second anode tail plate is a second anode plate, and one end of the second stack core body close to the second cathode tail plate is a second cathode plate. Through this stack core, single-stage pressure increasing and purification of hydrogen can be achieved.
[0014] As a preferred embodiment, a first current collector plate groove is provided on the side surface of the first insulating plate away from the first end plate, and the first current collector plate is arranged in the first current collector plate groove; a second current collector plate groove is provided on the side surface of the second insulating plate away from the second end plate, and the second current collector plate is arranged in the second current collector plate groove.
[0015] As a preferred embodiment, the electrochemical hydrogen pump device capable of realizing single-stage and step-by-step pressure increasing further includes a switching valve and a pressure gauge; the switching valve is arranged on the side surface of the second end plate away from the second insulating plate, and the switching valve is communicated with the stack core; the pressure gauge is arranged on the side surface of the second end plate away from the second insulating plate, and the pressure gauge is connected to the stack core.
[0016] As a preferred embodiment, a hydrogen inlet and a hydrogen outlet are provided on the first end plate and are independent of each other; the hydrogen inlet and the hydrogen outlet are respectively communicated with the core.
[0017] As a preferred embodiment, taking the direction perpendicular to the screw as the longitudinal section, the sectional area of the first end plate is equal to the sectional area of the second end plate; the sectional area of the first end plate is larger than the sectional area of the stacking body.
[0018] As a preferred embodiment, a first through hole adapted to the switching valve is provided on the second insulating plate, and the switching valve sequentially passes through the second end plate and the first through hole and then is communicated with the inside of the stacking part.
[0019] As a preferred embodiment, a second through hole adapted to the pressure gauge is provided on the second insulating plate, and the pressure gauge sequentially passes through the second end plate and the second through hole and then is communicated with the inside of the stacking part.
[0020] As a preferred embodiment, gas inlets adapted to the hydrogen inlet are provided on both the stacking part and the first insulating plate, and the hydrogen inlet is communicated with the core through the gas inlets.
[0021] As a preferred embodiment, gas outlets adapted to the hydrogen outlet are provided on both the stacking part and the first insulating plate, and the hydrogen outlet is communicated with the core through the gas outlets.
[0022] As a preferred embodiment, support columns are provided at 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.
[0023] By providing a first exhaust hole and a second exhaust hole on the second insulating plate, the device of the present application can realize single-stage pressurization purification and step-by-step pressurization purification by replacing the core, and can freely select single-stage pressurization purification or step-by-step pressurization purification according to actual usage requirements, which is simple and convenient. The structure of the present application is simple, occupies a small area, and has a low usage cost, and can effectively solve the problems that the existing electrochemical hydrogen pump cannot simultaneously achieve single-stage compression and step-by-step compression on the same device, the floor area and cost required for multiple single-stage compression electrochemical hydrogen pumps are high, and the usage cost pressure is large. Description of the Drawings
[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0025] Figure 1 FIG. 4 is a schematic diagram of the overall structure of an electrochemical hydrogen pump device that can achieve single-stage and step-by-step pressurization according to an embodiment of the present invention;
[0026] Figure 2 For Figure 1 the rear view of the electrochemical hydrogen pump device that can achieve single-stage and step-by-step pressurization;
[0027] Figure 3 For Figure 1 the exploded structure diagram of the electrochemical hydrogen pump device that can achieve single-stage and step-by-step pressurization;
[0028] Figure 4 For Figure 3 the structure diagram of the second insulating plate;
[0029] Figure 5 For Figure 3 the cross-sectional structure diagram of the second insulating plate;
[0030] Figure 6 For Figure 3 the exploded structure diagram of the stack core;
[0031] Figure 7 FIG. 38 is the exploded structure diagram of the stack core of another embodiment.
[0032] The realization, functional features, and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments
[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0034] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.
[0035] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0036] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.
[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0038] The electrochemical hydrogen pump of the present application adopts an electrolysis mode, oxidizes hydrogen at the anode and reduces hydrogen at the cathode. The separation and compression of hydrogen can be completed in only one step. Since the power consumption only acts on the hydrogen molecules passing through the membrane layer, the required energy consumption is very small.
[0039] Specifically, such as Figures 1 to 5As shown in the figure, an embodiment of the utility model provides an electrochemical hydrogen pump device capable of realizing single-stage and step-by-step pressurization, which includes a first end plate 10 (i.e., the upper end plate), a stacking body 20, and a second end plate 30 (i.e., the lower end plate); 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 several screw rods 40, and the several screw rods 40 are evenly arranged outside the stacking body 20;
[0040] The stacking body 20 includes a first insulating plate 21, a stacking part 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;
[0041] A sealing groove 231 is provided on the side of the second insulating plate 23 close to the second end plate 30, and two first exhaust holes 232 are respectively provided at both ends inside the sealing groove 231; at least two second exhaust holes 233 are provided between the two first exhaust holes 232, and the two second exhaust holes 233 are symmetrically arranged.
[0042] As a preferred embodiment, the two first exhaust holes 232 are symmetrically arranged; both the first exhaust holes 232 and the second exhaust holes 233 penetrate through the second insulating plate 23.
[0043] As a preferred embodiment, the stacking part 22 includes a first current collector plate 221, a stack core 222, and a second current collector plate 223 stacked in sequence. The first current collector plate 221 abuts against the first insulating plate 21, and the second current collector plate 223 abuts against the second insulating plate 23.
[0044] As a preferred embodiment, the first exhaust hole 232 is communicated with the stack core 222; alternatively, the second exhaust hole 233 is communicated with the stack core 222.
[0045] As a preferred embodiment, as Figure 6 shown, in this embodiment, the stack core 222 is communicated with the first exhaust hole 232; the stack core 222 includes a first anode tail plate A, a first anode plate B, a first stack core body C, a first cathode plate D, and a first cathode tail plate E stacked in sequence; the first stack core body C includes several first membrane electrodes C1 and several step-by-step pressurization plates C2 stacked, the first membrane electrodes C1 and the step-by-step pressurization plates C2 are alternately arranged, and both ends of the first stack core body C are first membrane electrodes C1. Through this stack core, step-by-step pressurization and purification of hydrogen can be realized.
[0046] As a preferred embodiment, as Figure 7As shown, in another embodiment, the core 222 is communicatively connected to the second exhaust hole 233; the core 222 includes a second anode end plate F, a second core body G, and a second cathode end plate H that are stacked in sequence; the second core body G includes a plurality of second anode plates G1, a plurality of second membrane electrodes G2, and a plurality of second cathode plates G3 that are stacked, and the second anode plates G1, the second membrane electrodes G2, and the second cathode plates G3 are stacked in sequence.
[0047] As a preferred embodiment, one end of the second core body G close to the second anode end plate F is the second anode plate G1, and one end of the second core body G close to the second cathode end plate H is the second cathode plate G3. Through this core, single-stage pressurization and purification of hydrogen can be achieved.
[0048] As a preferred embodiment, a first current collector plate groove 211 is provided on the side of the first insulating plate 21 away from the first end plate 10, and the first current collector plate 221 is disposed in the first current collector plate groove 211; a second current collector plate groove 234 is provided on the side of the second insulating plate 23 away from the second end plate 30, and the second current collector plate 223 is disposed in the second current collector plate groove 234.
[0049] As a preferred embodiment, the electrochemical hydrogen pump device capable of achieving single-stage and multi-stage pressurization further includes a switching valve 50 and a pressure gauge 60; the switching valve 50 is disposed on the side of the second end plate 30 away from the second insulating plate 23, and the switching valve 50 is communicatively connected to the core 222; the pressure gauge 60 is disposed on the side of the second end plate 30 away from the second insulating plate 23, and the pressure gauge 60 is connected to the core 222.
[0050] As a preferred embodiment, a hydrogen inlet 11 and a hydrogen outlet 12 that are independent of each other are provided on the first end plate 10; the hydrogen inlet 11 and the hydrogen outlet 12 are respectively communicatively connected to the core 222.
[0051] As a preferred embodiment, taking the direction perpendicular to the screw 40 as the longitudinal section, the sectional area of the first end plate 10 is equal to the sectional area of the second end plate 30; the sectional area of the first end plate 10 is larger than the sectional area of the stacking body 20.
[0052] As a preferred embodiment, a first through hole (not labeled in the figure) adapted to the switching valve 50 is provided on the second insulating plate 23, and the switching valve 50 sequentially passes through the second end plate 30 and the first through hole and then is communicatively connected to the inside of the stacking portion 22.
[0053] As a preferred embodiment, a second through hole (not labeled in the figure) adapted to the pressure gauge 60 is provided on the second insulating plate 23, and the pressure gauge 60 sequentially passes through the second end plate 30 and the second through hole and then is communicated with the inside of the stacking portion 22.
[0054] As a preferred embodiment, gas inlets (not labeled in the figure) adapted to the hydrogen inlet are provided on both the stacking portion 22 and the first insulating plate 21, and the hydrogen inlet is communicated with the core 222 through the gas inlets.
[0055] As a preferred embodiment, gas outlets (not labeled in the figure) adapted to the hydrogen outlet are provided on both the stacking portion 22 and the first insulating plate 21, and the hydrogen outlet is communicated with the core 222 through the gas outlets.
[0056] As a preferred embodiment, support columns 70 are provided at 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.
[0057] Taking step-by-step pressurization and purification as an example, when using the device of the present application, the mixed gas to be purified and pressurized (i.e., the mixed gas with hydrogen) enters from the hydrogen inlet of the first end plate. The mixed gas reaches the first membrane electrode area after passing through the first insulating plate, the first anode tail plate and the first anode plate. The unreacted gas flows out from the hydrogen outlet of the first end plate, and the gas that has reacted in the first membrane electrode area enters the next first membrane electrode through the step-by-step pressurization plate for pressurization and purification until the target pressure and purity are reached. The step-by-step pressurized gas is discharged from the first exhaust hole; the purification pressure can be displayed by the pressure gauge on the second end plate. The purity of the hydrogen purified by the multi-stage step-by-step purification of the device of the present application is higher than that of the hydrogen purified in one stage.
[0058] By providing the first exhaust hole and the second exhaust hole on the second insulating plate, the device of the present application can realize single-stage pressurization and purification and step-by-step pressurization and purification by replacing the core, and can freely select single-stage pressurization and purification or step-by-step pressurization and purification according to actual usage requirements, which is simple and convenient. The structure of the present application is simple, occupies a small area, and has a low usage cost, and can effectively solve the problems that the existing electrochemical hydrogen pump cannot simultaneously achieve single-stage compression and step-by-step compression on the same device, the floor area and cost required for multiple single-stage compression electrochemical hydrogen pumps are high, and the usage cost pressure is large.
[0059] The above are only the preferred embodiments of the present utility model, and do not thereby limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields shall be included within the patent protection scope of the present utility model.
Claims
1. An electrochemical hydrogen pump device capable of achieving single-stage and step-by-step pressurization, characterized in that, It includes a first end plate, a stacking body, and a second end plate; the first end plate, the stacking body, and the second end plate are stacked in sequence, and the first end plate and the second end plate are fixedly connected by several screw rods, and the several screw rods are evenly arranged outside the stacking body; The stacking body includes a first insulating plate, a stacking part, 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; A sealing groove is provided on the side of the second insulating plate close to the second end plate, and two first exhaust holes are respectively provided at both ends inside the sealing groove; at least two second exhaust holes are provided between the two first exhaust holes, and the two second exhaust holes are symmetrically arranged.
2. The electrochemical hydrogen pump device capable of realizing single-stage and step-by-step pressurization according to claim 1, wherein, The two first exhaust holes are symmetrically arranged; both the first exhaust holes and the second exhaust holes penetrate through the second insulating plate.
3. The electrochemical hydrogen pump device capable of achieving single-stage and step-by-step pressurization according to claim 1, characterized in that, The stacking part includes a first current collector plate, a stack core, and a second current collector plate stacked in sequence. The first current collector plate abuts against the first insulating plate, and the second current collector plate abuts against the second insulating plate.
4. The electrochemical hydrogen pump device capable of achieving single-stage and step-by-step pressurization according to claim 3, wherein The first exhaust hole is communicated with the stack core; or, the second exhaust hole is communicated with the stack core.
5. The electrochemical hydrogen pump device capable of achieving single-stage and step-by-step pressurization according to claim 4, characterized in that, The stack core is communicated with the first exhaust hole; the stack core includes a first anode tail plate, a first anode plate, a first stack core body, a first cathode plate, and a first cathode tail plate stacked in sequence; the first stack core body includes several first membrane electrodes and several step-by-step pressurizing plates stacked, the first membrane electrodes and the step-by-step pressurizing plates are arranged alternately, and both ends of the first stack core body are first membrane electrodes.
6. The electrochemical hydrogen pump device capable of realizing single-stage and step-by-step pressurization according to claim 4, characterized in that, The stack core is communicated with the second exhaust hole; the stack core includes a second anode tail plate, a second stack core body, and a second cathode tail plate stacked in sequence; the second stack core body includes several second anode plates, several second membrane electrodes, and several second cathode plates stacked, and the second anode plates, the second membrane electrodes, and the second cathode plates are stacked in sequence.
7. The electrochemical hydrogen pump device capable of realizing single-stage and step-by-step pressurization according to claim 6, wherein, One end of the second stack core body close to the second anode tail plate is a second anode plate, and one end of the second stack core body close to the second cathode tail plate is a second cathode plate.
8. The electrochemical hydrogen pump device capable of realizing single-stage and step-by-step pressurization according to claim 3, characterized in that, A first current collector plate groove is provided on the side of the first insulating plate away from the first end plate, and the first current collector plate is arranged in the first current collector plate groove; a second current collector plate groove is provided on the side of the second insulating plate away from the second end plate, and the second current collector plate is arranged in the second current collector plate groove.
9. The electrochemical hydrogen pump device capable of realizing single-stage and step-by-step pressurization according to claim 3, wherein, The electrochemical hydrogen pump device capable of realizing single-stage and step-by-step pressurization further includes a switching valve and a pressure gauge; the switching valve is provided on the side of the second end plate away from the second insulating plate, and the switching valve is communicated with the stack core; the pressure gauge is provided on the side of the second end plate away from the second insulating plate, and the pressure gauge is connected to the stack core.
10. The electrochemical hydrogen pump device capable of realizing single-stage and step-by-step pressurization according to claim 3, characterized in that, The first end plate is provided with an independent hydrogen inlet and a hydrogen outlet; the hydrogen inlet and the hydrogen outlet are respectively communicated with the stack core; Taking the direction perpendicular to the screw as the longitudinal section, the sectional area of the first end plate is equal to the sectional area of the second end plate; the sectional area of the first end plate is larger than the sectional area of the stacking body; Support columns are arranged at the end corners of the side of the second end plate away from the second insulating plate.