Electrochemical hydrogen compression device, hydrogen multi-stage pressurization system and hydrogen supply system

Abstract

The utility model belongs to the technical field of electrochemical compressors, and particularly relates to an electrochemical hydrogen compression device, a hydrogen multi-stage pressurization system and a hydrogen supply system. The electrochemical hydrogen compression device comprises an EHC electric pile, wherein the EHC electric pile comprises an anode, an exchange membrane and a cathode which are sequentially stacked; the first pipeline system is used for providing hydrogen for the anode; and the second pipeline system is used for providing water, wetting the exchange membrane and outputting hydrogen generated by the cathode. According to the electrochemical hydrogen compression device provided by the invention, an external gasification humidification system and independent temperature control equipment are omitted, the structure is simplified, the cost is reduced, the problem of anode flooding caused by water vapor condensation in gasification humidification in an existing gas inlet pipeline is solved, and the stability and the performance of the electrochemical hydrogen compression device are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of electrochemical compressors, and more specifically, relates to an electrochemical hydrogen compression device, a hydrogen multi-stage pressurization system, and a hydrogen supply system. Background Art

[0002] The electrochemical hydrogen compressor (EHC) is a device based on proton exchange membrane technology that can convert electrical energy into compression energy through electrochemical reactions. It uses redox reactions to achieve pressurization. Low-pressure hydrogen undergoes an oxidation reaction at the anode to generate protons, which are transferred to the cathode through the proton exchange membrane and then reduced to hydrogen. Driven by an external voltage, the cathode hydrogen can generate back pressure. This technology does not have any moving parts, and its structure and maintenance are simple. It has low operating noise, reduces the possibility of failure, saves costs, and improves the safety of the equipment. In addition, the electrochemical hydrogen compressor is an isothermal process, and its theoretical efficiency is significantly higher than mechanical compression. It can compress hydrogen with lower energy consumption, less heat loss and higher efficiency. It is currently the technology most likely to replace traditional mechanical compressors.

[0003] Specifically, the electrochemical hydrogen compressor is based on a proton exchange membrane fuel cell (PEM fuel cell) and has a structure similar to that of a PEM fuel cell, including key components such as a membrane electrode, a gas diffusion layer, a bipolar plate, a current collecting plate, and an end plate. The membrane electrode is the core component of the EHC, which is formed by coating a catalyst on both sides of the proton exchange membrane. Platinum (Pt) is mostly used as a catalyst for the anode and cathode. The proton exchange membrane, as a solid electrolyte, is a key component for achieving ion conduction and completing a complete circuit. The selective properties of the proton exchange membrane prevent the transfer of electrons and gases, leaving inert or impurity gases at the anode and providing mechanical support. Like PEM fuel cells, EHC also requires a water and thermal management system, and usually uses an external gasification and humidification system to achieve optimal proton transfer.

[0004] The EHC operates on the following principles: a hydrogen oxidation reaction (HOR) occurs at the anode, and a hydrogen evolution reaction (HER) occurs at the cathode. Specifically, humidified hydrogen is introduced to the anode, where it is decomposed into protons and electrons by an external power source. Subsequently, the proton exchange membrane is moistened with highly humidified hydrogen. The protons then recombine with electrons from the cathode's external circuit to produce hydrogen. The cathode is tightly closed, achieving higher pressures.

[0005] As can be seen, the EHC compression process is isothermal. To ensure adequate heat distribution and prevent hotspots or uneven temperature distribution within the proton exchange membrane, existing EHCs require temperature control equipment. Furthermore, existing EHCs typically require a water management system to achieve optimal proton transfer, which inevitably requires the use of an external vaporization and humidification system similar to that used in fuel cells. These temperature control equipment and vaporization and humidification systems increase the complexity, cost, and stability of the EHC. Utility Model Content

[0006] The purpose of the embodiments of the present application is to provide an electrochemical hydrogen compression device, as well as a hydrogen multi-stage pressurization system and a hydrogen supply system, to solve the technical problems of complex structure, high cost and unstable performance in existing electrochemical hydrogen compression devices.

[0007] To achieve the above objectives, the technical solution adopted in this application is:

[0008] In a first aspect, an electrochemical hydrogen compression device is provided, comprising:

[0009] An EHC stack, the EHC stack comprising an anode, an exchange membrane, and a cathode stacked in sequence;

[0010] a first piping system, the first piping system being used to provide hydrogen to the anode;

[0011] The second pipeline system is used to provide water to wet the exchange membrane and to output the hydrogen generated by the cathode.

[0012] In one embodiment of the first aspect, the first pipeline system includes a hydrogen input pipeline and a first sensor, wherein both ends of the hydrogen input pipeline are respectively connected to the anode and an external hydrogen source, and the first sensor is arranged on the hydrogen input pipeline and is used to feedback the pressure in the hydrogen input pipeline.

[0013] In one embodiment of the first aspect, the second pipeline system includes an input pipeline and a first output pipeline, the input pipeline and the first output pipeline are connected via the cathode, the input pipeline is used to transport water to the cathode, and the first output pipeline is used to output the water from the cathode and the hydrogen generated by the cathode.

[0014] In one embodiment of the first aspect, the end of the input pipeline away from the cathode is connected to a water tank, and the end of the first output pipeline away from the cathode is connected to the water tank, so that the water tank, the input pipeline, the cathode and the first output pipeline form a circulating water circuit.

[0015] In one embodiment of the first aspect, a circulation pump is provided between the water tank and the input pipeline, and the circulation pump is used to provide power for conveying water to the input pipeline.

[0016] In one embodiment of the first aspect, the water tank is a constant temperature water tank.

[0017] In one embodiment of the first aspect, the second pipeline system further includes a second output pipeline, one end of the second output pipeline is connected to the water tank, and the other end of the second output pipeline is connected to an external device, so that the cathode, the first output pipeline, the water tank and the second output pipeline form a hydrogen output pipeline.

[0018] In one embodiment of the first aspect, a back-pressure valve is provided on the second output pipeline, and the back-pressure valve is used to control the hydrogen output pressure of the second output pipeline.

[0019] In a second aspect, a multi-stage hydrogen pressurization system is provided, comprising at least two electrochemical hydrogen compression devices provided in the present application, all of the electrochemical hydrogen compression devices being connected in sequence.

[0020] In one embodiment of the second aspect, the second pipeline system includes a first output pipeline, a water tank and a second output pipeline connected in sequence, the end of the first output pipeline away from the water tank is connected to the cathode, and the end of the second output pipeline away from the water tank is connected to the first pipeline system of the next electrochemical hydrogen compression device.

[0021] In a third aspect, a hydrogen supply system is provided, comprising the electrochemical hydrogen compression device provided in the present application or the hydrogen multi-stage pressurization system provided in the present application and a receiving device, wherein the receiving device is connected to the electrochemical hydrogen compression device located at the very end.

[0022] The receiving device may be a hydrogen-using device (such as a fuel cell vehicle) or a hydrogen storage device (such as a gas cylinder or a gas transport pipeline).

[0023] The first aspect of this application provides an electrochemical hydrogen compression device. Compared to the prior art, this device utilizes a second piping system to supply water to the cathode, which wets the exchange membrane with water, thereby providing the water-containing membrane required for proton transport. On the one hand, the humidification system in the prior art can be eliminated, and the first piping system can directly supply hydrogen to the anode, thereby simplifying the structure and reducing costs. On the other hand, it avoids the problem of anode flooding caused by water vapor condensation in the existing gasification humidification in the intake line, thereby improving the stability of the electrochemical hydrogen compression device. Furthermore, water can play a certain role in maintaining a constant temperature for the entire EHC stack, avoiding the localized overheating caused by the existing gasification humidification. This saves the need for separate temperature control equipment, reduces costs, and stabilizes the performance of the electrochemical hydrogen compression device.

[0024] The multi-stage hydrogen pressurization system provided in the second aspect of this application utilizes the electrochemical hydrogen compression device provided herein, eliminating the need for a gasification and humidification system and separate temperature control equipment. This simplifies the structure, reduces costs, and improves the performance and stability of the multi-stage hydrogen pressurization system. By sequentially connecting multiple electrochemical hydrogen compression devices, the high-pressure gasification and humidification system at the anode input can be eliminated, allowing hydrogen to be pressurized at multiple levels to achieve a higher pressurization effect, further increasing the potential for commercialization.

[0025] The hydrogen supply system provided in the third aspect of this application utilizes the electrochemical hydrogen compression device provided herein. A second piping system is used to supply water to the cathode, which moistens the exchange membrane, thereby providing the water-containing membrane required for proton transport. This system also addresses the problem of anode flooding due to condensation of water vapor, a common problem in prior art methods that utilize in-line vaporization and humidification. Furthermore, the water provides a certain degree of temperature regulation for the entire EHC stack. Therefore, the hydrogen supply system of this application eliminates the need for a vaporization and humidification system and separate temperature control equipment, simplifying the structure, reducing costs, and improving the performance and stability of the hydrogen supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 This is a schematic structural diagram of the electrochemical hydrogen compression device provided in an embodiment of the present application.

[0028] Among them, the reference numerals in the figures are:

[0029] 1-EHC stack; 10-anode; 100-anode inlet; 11-exchange membrane; 12-cathode; 120-cathode inlet; 121-cathode outlet;

[0030] 2-first pipeline system; 20-hydrogen input pipeline; 21-first sensor;

[0031] 3-Second piping system; 30-Input pipeline; 31-First output pipeline; 32-Water tank; 33-Circulation pump; 34-Second output pipeline; 35-Second sensor; 36-Back pressure valve; 37-Safety valve; 38-External device. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0033] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0036] Unlike PEM fuel cells, EHCs require an external power source for operation. The required voltage and energy consumption depend on factors such as the partial pressure of hydrogen at the anode and cathode, operating temperature, and overpotential. Generally speaking, improving EHC performance requires reducing the irreversible overvoltage, which primarily dominates the activation (due to catalyst activity) and ohmic (primarily due to the ionic conductivity of the proton exchange membrane) overpotentials.

[0037] Although the EHC compression process is isothermal, some of the overpotential may be converted into heat on the proton exchange membrane. To stabilize the performance of the EHC, existing EHCs require proper temperature management using air cooling or liquid cooling to ensure adequate heat distribution and prevent hot spots and uneven temperature distribution within the membrane. More importantly, because the EHC is based on PEM fuel cell technology, a water management system is currently required in the EHC, inevitably utilizing an external gasification and humidification system similar to that used in fuel cells to achieve optimal proton transfer. The cooling and gasification humidification systems increase the complexity, cost, and stability of the EHC; the humidified hydrogen is also prone to condensation when encountering temperature unevenness in the system, causing water flooding, further local overheating, and performance degradation.

[0038] The electrochemical hydrogen compression device provided in this application starts from the requirements of uniform temperature distribution of EHC and water content of exchange membrane, which can meet the temperature and water management requirements of EHC while solving the above-mentioned problems of complex structure, high cost and unstable performance.

[0039] See also Figure 1 , the electrochemical hydrogen compression device provided in the embodiment of the present application is now described. The electrochemical hydrogen compression device includes an EHC stack 1, a first pipeline system 2, and a second pipeline system 3. The EHC stack 1 includes an anode 10, an exchange membrane 11, and a cathode 12 stacked in sequence. The anode 10 is used for electrochemically oxidizing hydrogen, the exchange membrane 11 is used to transport protons obtained by oxidation, and the cathode 12 is used to electrochemically reduce protons to hydrogen. The first pipeline system 2 is used to provide hydrogen to the anode 10. The second pipeline system 3 is used to provide water and wet the exchange membrane 11 to ensure uniform temperature distribution of the membrane electrode, and to output the hydrogen produced by the cathode 12.

[0040] The hydrogen here can be dry hydrogen or humidified hydrogen. That is, the embodiments of the present application have no restrictions on the wetness of the hydrogen. Of course, using dry hydrogen is more effective in preventing humidified hydrogen from condensing due to uneven temperature in the system, causing flooding and local overheating.

[0041] In the EHC, the anode 10 undergoes a hydrogen oxidation reaction (HOR), and the reaction formula is: H2→2H + +2e - ;

[0042] The cathode 12 undergoes hydrogen evolution reaction (HER), and the reaction formula is: 2H + +2e - →H2↑.

[0043] The first pipeline system 2 transports hydrogen to the anode 10, where the hydrogen is electrochemically oxidized. The second pipeline system 3 provides water, which is used to maintain a high water content in the exchange membrane 11 and meet the water content required for the protons obtained by oxidation at the anode 10 to be transported through the exchange membrane 11, and the protons are electrochemically reduced at the cathode 12 to form hydrogen.

[0044] To ensure sufficient moisture content in the exchange membrane 11, existing technologies employ external vaporization humidification. This involves first humidifying the hydrogen to be supplied to the anode 10 before delivering it to the anode 10. The humidified hydrogen then moistens the exchange membrane 11. However, protons passing through the exchange membrane 11 carry water molecules with them (this is known as electroosmotic drag), depleting the water content in the membrane 11. Therefore, the degree of moistening provided to the exchange membrane 11 by humidified hydrogen using existing technologies is insufficient. Supersaturation of hydrogen and water vapor is also impossible to achieve in all areas of the exchange membrane 11.

[0045] In the embodiment of the present application, water is introduced into the cathode instead of the conventional gasification humidification method, which can keep the membrane electrode moist for a longer period of time and achieve a higher water content. Protons can pass through the membrane electrode well and be reduced again at the cathode 12, thereby improving the performance of the EHC.

[0046] Compared with the prior art, the electrochemical hydrogen compression device provided in the present application eliminates the need for an external gasification and humidification system and a separate temperature control device, simplifies the structure, reduces costs, solves the problem of water vapor condensation in the prior art gasification and humidification in the air intake pipeline causing flooding of the anode 10, and improves the stability and performance of the electrochemical hydrogen compression device.

[0047] In another embodiment of this application, please continue to refer to Figure 1 The first pipeline system 2 includes a hydrogen input pipeline 20 and a first sensor 21. The two ends of the hydrogen input pipeline 20 are respectively connected to the anode 10 and an external hydrogen source. The first sensor 21 is provided on the hydrogen input pipeline 20 and is used to feedback the pressure in the hydrogen input pipeline 20. Specifically, the hydrogen in the hydrogen input pipeline 20 is supplied to the anode 10 via the anode 10 inlet. The first sensor 21 is specifically a pressure sensor.

[0048] In another embodiment of this application, please continue to refer to Figure 1The second pipeline system 3 includes an input pipeline 30 and a first output pipeline 31, and the input pipeline 30 and the first output pipeline 31 are connected via the cathode 12. It should be noted that the input pipeline 30 is only connected to the cathode 12, and the output pipeline 31 is only connected to the cathode 12, and the communication method between the input pipeline 30 and the cathode 12 is the same or similar to the communication method between the output pipeline 31 and the cathode 12. The input pipeline 30 is used to transport water to the cathode 12. Specifically, the water passing through the input pipeline 30 is transported to the cathode 12 from the cathode 12 inlet. The first output pipeline 31 is used to output the water from the cathode 12 and the hydrogen generated by the cathode 12. Specifically, the water at the cathode 12 is output to the first output pipeline 31 via the cathode 12 outlet. At the same time, the hydrogen generated at the cathode 12 is also output to the first output pipeline 31 along with the water via the cathode 12 outlet. Therefore, the first output pipeline 31 serves to transport water and output hydrogen at the same time, and the water serves to moisten the exchange membrane 11 and control the temperature, making the overall structure of the electrochemical hydrogen compression device more compact and the design more ingenious, and also improving the efficiency performance of the electrochemical hydrogen compression device.

[0049] In another embodiment of the present application, the end of the input pipeline 30 away from the cathode 12 is connected to the water tank 32, and the end of the first output pipeline 31 away from the cathode 12 is connected to the water tank 32, so that the water tank 32, the input pipeline 30, the cathode 12 and the first output pipeline 31 form a circulating water circuit.

[0050] Specifically, water tank 32 provides a water source for input pipeline 30. The sequential connection of water tank 32, input pipeline 30, cathode 12, and first output pipeline 31 enables water circulation, thereby continuously providing circulating water to cathode 12. The circulating water can continuously provide sufficient water to exchange membrane 11, better ensuring that exchange membrane 11 reaches a higher water content, thereby improving the efficiency and performance of the electrochemical hydrogen compression device. The circulating water circuit can also better drive the hydrogen generated by the cathode to be output through first output pipeline 31. In addition, the circulating water also has a better temperature-regulating effect on the electrochemical hydrogen compression device.

[0051] In another embodiment of the present application, a circulation pump 33 is provided between the water tank 32 and the input pipeline 30. The circulation pump 33 is used to provide power for the input pipeline 30 to transport water, thereby realizing water circulation between the water tank 32, the input pipeline 30, the cathode 12 and the first output pipeline 31.

[0052] In another embodiment of the present application, the circulation pump 33 may not be provided between the water tank 32 and the input pipe 30. In this case, the siphon effect can be used to provide the power for transporting water to the input pipe 30. Specifically, by creating a height difference between the water level in the water tank 32 and the water level in the cathode 12, a pressure difference is generated, so that the water in the water tank 32 can be transported to the cathode 12 through the input pipe 30.

[0053] In another embodiment of the present application, the circulation pump 33 may not be provided between the water tank 32 and the input pipe 30 , and the water tank 32 and the EHC stack 1 may be combined into a whole, and the siphon effect is used to enable the water in the water tank 32 to flow into the cathode 12 .

[0054] In another embodiment of the present application, the water tank 32 is a constant-temperature water tank 32 . Using a constant-temperature water tank 32 can maintain a constant water temperature, thereby further enhancing the water's constant-temperature effect on the EHC stack 1 . The constant temperature in this embodiment includes both heating and cooling. Specifically, when the temperature of the EHC stack 1 is too high, the constant-temperature water tank cools the EHC stack 1 to an appropriate temperature. When the temperature of the EHC stack 1 is too low, the constant-temperature water tank heats the EHC stack 1 to an appropriate temperature. This ensures temperature uniformity across the membrane electrodes in the EHC stack 1, thereby ensuring stable EHC performance.

[0055] In another embodiment of the present application, the second pipeline system 3 further includes a second output pipeline 34, one end of the second output pipeline 34 is connected to the water tank 32, and the other end of the second output pipeline 34 is connected to the external device 38, so that the first output pipeline 31, the water tank 32 and the second output pipeline 34 form a hydrogen output pipeline.

[0056] That is, the hydrogen generated by the cathode 12 passes through the first output pipeline 31 and the water tank 32, and is finally output to the external device 38 through the second output pipeline 34, thereby realizing the output of hydrogen.

[0057] In another embodiment of the present application, a second sensor 35 is provided on the second output pipeline 34. The second sensor 35 is used to feedback the pressure of the second output pipeline 34, thereby monitoring the output pressure of the hydrogen. The second sensor 35 is specifically a pressure sensor, and its structure is the same or similar to that of the first sensor 21.

[0058] In another embodiment of the present application, a back pressure valve 36 is provided on the second output pipeline 34 to control the hydrogen output pressure of the second output pipeline 34. The back pressure valve 36 is used in conjunction with the second sensor 35 to control the output pressure of the hydrogen based on the pressure feedback from the second sensor 35, thereby outputting the required hydrogen. Hydrogen above the required pressure is exhausted or enters the external circulation system and then passed through the first pipeline system 2 to the anode 10 for recycling.

[0059] In another embodiment of the present application, the second piping system 3 further includes a safety valve 37. The safety valve 37 is used to ensure that the pressure of the second piping system 3 is lower than a set safety value. When the pressure exceeds the safety value, the safety valve 37 will quickly open and release the pressure in the second piping system 3. Specifically, the safety valve 37 can be provided at the water tank 32.

[0060] The present application also provides a multi-stage hydrogen pressurization system, comprising at least two electrochemical hydrogen compression devices as described above, all of which are sequentially connected or assembled to perform multi-stage hydrogen pressurization to obtain hydrogen at a higher pressure. The connection or assembly between the electrochemical hydrogen compression devices can be specifically connected via external piping, or can be assembled via internal piping to form a single, integrated, combined hydrogen compression device.

[0061] Therefore, the electrochemical hydrogen compression device can be used individually or in conjunction with each other to achieve higher pressure.

[0062] The multi-stage hydrogen pressurization system provided herein utilizes the electrochemical hydrogen compression device provided herein, eliminating the need for a vaporization and humidification system and separate temperature control equipment. This simplifies the structure, reduces costs, and improves the performance and stability of the multi-stage hydrogen pressurization system. Multiple electrochemical hydrogen compression devices are connected in sequence to achieve a higher level of hydrogen pressurization through multi-stage compression. This also eliminates the need for a high-pressure vaporization and humidification system at the anode input of each EHC stack, further enhancing the potential for commercialization.

[0063] In another embodiment of the present application, the second pipeline system 3 includes a first output pipeline 31, a water tank 32 and a second output pipeline 34 connected in sequence, the end of the first output pipeline 31 away from the water tank 32 is connected to the cathode 12, and the end of the second output pipeline 34 away from the water tank 32 is connected to the first pipeline system of the next electrochemical hydrogen compression device.

[0064] Exemplarily, when three electrochemical hydrogen compression devices are connected for use, three electrochemical hydrogen compression devices are provided as a first compression device, a second compression device and a third compression device. The first compression device, the second compression device and the third compression device are connected in sequence. Specifically, the end of the second output pipeline 34 of the first compression device away from the water tank 32 is connected to the first pipeline system 2 of the second compression device, so that the compressed hydrogen obtained by the first compression device serves as the hydrogen source of the second compression device for further compression. Similarly, the end of the second output pipeline 34 of the second compression device away from the water tank 32 is connected to the first pipeline system 2 of the third compression device, so that the compressed hydrogen obtained by the second compression device serves as the hydrogen source of the third compression device for further compression. The second output pipeline 34 of the third compression device is connected to a receiving device, and after the third compression device obtains hydrogen at the required pressure, the hydrogen is output to the receiving device for storage or use. The receiving device can be a hydrogen-using device (such as a fuel cell vehicle) or a hydrogen storage device (such as a gas cylinder or a gas transport pipeline).

[0065] The present application also provides a hydrogen supply system, comprising the electrochemical hydrogen compression device or the multi-stage hydrogen pressurization system provided herein and a receiving device, the receiving device being connected to the electrochemical hydrogen compression device at the end. The receiving device can be a hydrogen-using device (e.g., a fuel cell vehicle) or a hydrogen storage device (e.g., a gas cylinder or gas transport pipeline).

[0066] The hydrogen supply system of this application utilizes the electrochemical hydrogen compression device provided herein. A second piping system is used to supply water to the cathode, which moistens the exchange membrane, thereby providing the membrane moisture required for the anode reaction. This system also addresses the problem of anode flooding due to condensation of water vapor, a common problem in prior art methods that utilize in-line vaporization and humidification. Furthermore, the water provides a certain degree of temperature regulation for the entire EHC stack. Therefore, the hydrogen supply system of this application eliminates the need for a vaporization and humidification system and separate temperature control equipment, simplifying the structure, reducing costs, and improving the performance and stability of the hydrogen supply system.

[0067] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An electrochemical hydrogen compression device, characterized in that: include: An EHC stack, the EHC stack comprising an anode, an exchange membrane, and a cathode stacked in sequence; a first piping system, the first piping system being used to provide hydrogen to the anode; The second pipeline system is used to provide water to wet the exchange membrane and to output the hydrogen generated by the cathode.

2. The electrochemical hydrogen compression device according to claim 1, characterized in that: The first pipeline system includes a hydrogen input pipeline and a first sensor. The two ends of the hydrogen input pipeline are respectively connected to the anode and an external hydrogen source. The first sensor is arranged on the hydrogen input pipeline and is used to feedback the pressure in the hydrogen input pipeline.

3. The electrochemical hydrogen compression device according to claim 1 or 2, characterized in that: The second pipeline system includes an input pipeline and a first output pipeline, the input pipeline and the first output pipeline are connected via the cathode, the input pipeline is used to transport water to the cathode, and the first output pipeline is used to output the water from the cathode and the hydrogen generated by the cathode.

4. The electrochemical hydrogen compression device according to claim 3, characterized in that: One end of the input pipeline away from the cathode is connected to a water tank, and one end of the first output pipeline away from the cathode is connected to the water tank, so that the water tank, the input pipeline, the cathode and the first output pipeline form a circulating water circuit.

5. The electrochemical hydrogen compression device according to claim 4, characterized in that: A circulation pump is provided between the water tank and the input pipeline, and the circulation pump is used to provide power for conveying water to the input pipeline.

6. The electrochemical hydrogen compression device according to claim 4, characterized in that: The water tank is a constant temperature water tank.

7. The electrochemical hydrogen compression device according to any one of claims 4 to 6, characterized in that: The second pipeline system further includes a second output pipeline, one end of which is connected to the water tank, and the other end of which is connected to an external device, so that the first output pipeline, the water tank and the second output pipeline form a hydrogen output pipeline.

8. The electrochemical hydrogen compression device according to claim 7, characterized in that: A back pressure valve is provided on the second output pipeline, and the back pressure valve is used to control the hydrogen output pressure of the second output pipeline.

9. A hydrogen multi-stage pressurization system, characterized in that: It comprises at least two electrochemical hydrogen compression devices according to any one of claims 1 to 8, and all of the electrochemical hydrogen compression devices are connected in sequence.

10. A hydrogen supply system, characterized in that: It comprises the electrochemical hydrogen compression device according to any one of claims 1 to 8 or the hydrogen multi-stage pressurization system according to claim 9 and a receiving device, wherein the receiving device is connected to the electrochemical hydrogen compression device located at the end.

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