A two-way gas compressor system for a fuel cell

Abstract

The present application provides a bidirectional gas compressor system for a fuel cell, including a fuel cell module, a gas compressor, and a water electrolysis hydrogen production module. The gas compressor is respectively connected to the fuel cell module and the water electrolysis hydrogen production module. A coaxial gear is arranged inside the gas compressor, and the coaxial gear at least includes a first coaxial gear and a second coaxial gear arranged adjacent to each other. The first coaxial gear is respectively connected to the fuel cell module and the water electrolysis hydrogen production module. The second coaxial gear is respectively connected to the fuel cell module and the water electrolysis hydrogen production module. A first large gear and a first small gear are arranged on the first coaxial gear, and a second large gear and a second small gear are arranged on the second coaxial gear. The distance between the first large gear and the first small gear is less than the distance between the second large gear and the second small gear. The present application has low cost and is easy to be mass-produced or large-scale produced.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and particularly to a bidirectional gas compressor system for fuel cells. Background Art

[0002] An integrated regenerative fuel cell system mainly includes a fuel cell stack module, a water electrolysis hydrogen production module, an air supply system, a hydrogen supply system, a thermal management system, etc. Among them, the main function of the fuel cell stack module is to generate continuous electric energy by consuming hydrogen. The main function of the water electrolysis hydrogen production module is to produce hydrogen through a water electrolysis reaction. The hydrogen produced by the water electrolysis hydrogen production module can be supplied to the fuel cell stack module, so as to realize an integrated regenerative fuel cell with the dual functions of obtaining hydrogen by using external electric energy and consuming hydrogen for power generation by the fuel cell stack.

[0003] The existing air supply system includes an air compressor, which is used to provide a certain flow rate and pressure for the fuel cell stack to meet the needs of fuel cell electrochemical reactions; the water electrolysis hydrogen production module includes a diaphragm pump, which is used to compress the hydrogen produced by the water electrolysis hydrogen production module and supply it to the fuel cell stack module or compress and transport it to the hydrogen storage device of the water electrolysis hydrogen production module. That is, the device for providing air for the fuel cell stack module and the device for compressing and transporting the hydrogen produced by the water electrolysis hydrogen production module are separate different devices, and the structure is relatively complex. Summary of the Invention

[0004] Based on this, an embodiment of the present invention provides a bidirectional gas compressor system for fuel cells, aiming to solve the problem that in the existing integrated regenerative fuel cell system, the device for providing air for the fuel cell stack module by the air compressor and the device for compressing and transporting the hydrogen produced by the water electrolysis hydrogen production module by the diaphragm pump are separate devices, with a relatively complex structure, and it is impossible to use one device to achieve the functions of both. This application can achieve the functions of the air compressor in the existing air supply system and the diaphragm pump in the existing water electrolysis hydrogen production module, simplifies the components, improves the efficiency, and saves costs.

[0005] To achieve the above object, an embodiment of the present invention provides a bidirectional gas compressor system for fuel cells, including a fuel cell module, a gas compressor, and a water electrolysis hydrogen production module, wherein the gas compressor is respectively connected to the fuel cell module and the water electrolysis hydrogen production module;

[0006] A coaxial gear is arranged in the gas compressor, and the coaxial gear at least includes an adjacent first coaxial gear and a second coaxial gear; the first coaxial gear is respectively connected to the fuel cell module and the water electrolysis hydrogen production module; the second coaxial gear is respectively connected to the fuel cell module and the water electrolysis hydrogen production module;

[0007] A first large gear and a first small gear are provided on the first coaxial gear, and a second large gear and a second small gear are provided on the second coaxial gear; the distance between the first large gear and the first small gear is less than the distance between the second large gear and the second small gear.

[0008] As a preferred embodiment, the first large gear is disposed close to the second small gear, and the first small gear is disposed close to the second large gear.

[0009] As a preferred embodiment, the diameter of the first large gear is greater than the diameter of the first small gear; the diameter of the second large gear is greater than the diameter of the second small gear.

[0010] As a preferred embodiment, when the gas compressor supplies air to the fuel cell module, the gas compressor is in a low output mode, and the first large gear is meshed and connected with the second large gear.

[0011] As a preferred embodiment, when the gas compressor transports the hydrogen gas of the electrolytic water hydrogen production module to the fuel cell module, the gas compressor is in a high output mode, and the first large gear is meshed and connected with the second small gear; or, the first small gear is meshed and connected with the second large gear; or, the first small gear is meshed and connected with the second small gear.

[0012] As a preferred embodiment, a hydrogen storage device is provided in the electrolytic water hydrogen production module, the hydrogen storage device is connected to a first filter, and the first filter is connected to the fuel cell module through an intake valve.

[0013] As a preferred embodiment, the air compressor is connected to the hydrogen storage device through the first filter.

[0014] As a preferred embodiment, the fuel cell module is connected to the air compressor through an exhaust valve.

[0015] As a preferred embodiment, the air compressor is connected to an air supply system through a second filter.

[0016] As a preferred embodiment, the air compressor is connected to the air inlet of the fuel cell module.

[0017] As a preferred embodiment, the two-way gas compressor system for fuel cells further includes a thermal management module, and the thermal management module is connected to the fuel cell module.

[0018] Through the present application, it is possible to solve the problem that in the existing integrated regenerative fuel cell system, the air compressor is a device for supplying air to the fuel cell stack module, and the diaphragm pump is a device for compressing and transporting the hydrogen gas produced by the electrolytic water hydrogen production module. The two are separate devices, with a relatively complex structure, and it is impossible to use one device to achieve the functions of both. The present application can achieve the functions of the air compressor of the existing air supply system and the diaphragm pump of the existing electrolytic water hydrogen production module, simplify the components, improve the efficiency, save costs, have a high production efficiency, and are easy to mass-produce or produce on a large scale.

[0019] The realization of the object of the present invention, its functional characteristics and advantages will be further described in conjunction with the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the frame structure of a two-way gas compressor system for a fuel cell according to an embodiment of the present invention;

[0021] Figure 2 is Figure 1 a schematic diagram of the working principle of the two-way gas compressor system for a fuel cell. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0023] 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 invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0024] In the present application, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and the like 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, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0025] 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.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, such descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed 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 such feature. 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 scope of protection required by the present invention.

[0027] The existing air supply system includes an air compressor, which is used to provide a certain flow rate and pressure for the fuel cell stack to meet the needs of the fuel cell electrochemical reaction; the electrolytic water hydrogen production module includes a diaphragm pump, which is used to compress the hydrogen produced by the electrolytic water hydrogen production module and supply it to the fuel cell stack module or compress and transport it to the hydrogen storage device of the electrolytic water hydrogen production module, that is, the device for supplying air to the fuel cell stack module and the device for compressing and transporting the hydrogen produced by the electrolytic water hydrogen production module are separate and different devices, and the structure is relatively complex. Based on this, it is necessary to provide a bidirectional gas compressor system for fuel cells to solve the above technical problems.

[0028] To achieve the above object, as Figures 1 to 2 shown, an embodiment of the present invention provides a bidirectional gas compressor system for fuel cells, including a fuel cell module 10, a gas compressor 20, and an electrolytic water hydrogen production module 30. The gas compressor 20 is respectively connected to the fuel cell module 10 and the electrolytic water hydrogen production module 30;

[0029] A coaxial gear 21 is disposed in the gas compressor 20. The coaxial gear 21 at least includes a first coaxial gear 211 and a second coaxial gear 212 arranged adjacent to each other; the first coaxial gear 211 is respectively connected to the fuel cell module 10 and the electrolytic water hydrogen production module 30; the second coaxial gear 212 is respectively connected to the fuel cell module 10 and the electrolytic water hydrogen production module 30;

[0030] A first large gear 2111 and a first small gear 2112 are provided on the first coaxial gear 211, and a second large gear 2121 and a second small gear 2122 are provided on the second coaxial gear 212; the distance between the first large gear 2111 and the first small gear 2112 is less than the distance between the second large gear 2121 and the second small gear 2122. In this way, the functions of the air compressor of the existing air supply system and the diaphragm pump of the existing electrolytic water hydrogen production module can be realized, the components are simplified, the efficiency is improved, the cost is saved, and the production efficiency is relatively high.

[0031] The gas compressor of the present application can compress air and supply it to the fuel cell stack module, and can also directly compress and transport the hydrogen gas produced by the electrolytic water hydrogen production module to the fuel cell stack; or it can also compress and transport the hydrogen gas in the hydrogen storage device of the electrolytic water hydrogen production module to the fuel cell stack.

[0032] As a preferred embodiment, the first large gear 2111 is arranged close to the second small gear 2122, and the first small gear 2112 is arranged close to the second large gear 2121.

[0033] As a preferred embodiment, the diameter of the first large gear 2111 is larger than the diameter of the first small gear 2112; the diameter of the second large gear 2121 is larger than the diameter of the second small gear 2122.

[0034] As a preferred embodiment, when the gas compressor 20 supplies air to the fuel cell module 10, the gas compressor 20 is in a low output mode, and the first large gear 2111 is meshed and connected with the second large gear 2121. In this way, the functions of the air compressor of the existing air supply system can be realized, the components are simplified, the efficiency is improved, the cost is saved, and the production efficiency is relatively high.

[0035] As a preferred embodiment, when the gas compressor 20 transports the hydrogen gas of the electrolytic water hydrogen production module 30 to the fuel cell module 10, the gas compressor 20 is in a high output mode, and the first large gear 2111 is meshed and connected with the second small gear 2122;

[0036] Or, the first small gear 2112 is meshed and connected with the second large gear 2121;

[0037] Or, the first small gear 2112 is meshed and connected with the second small gear 2122. In this way, the functions of the diaphragm pump of the existing electrolytic water hydrogen production module can be realized, the components are simplified, the efficiency is improved, the cost is saved, and the production efficiency is relatively high.

[0038] As a preferred embodiment, a hydrogen storage device 31 is provided in the electrolytic water hydrogen production module 30. The hydrogen storage device 31 is connected to a first filter 40, and the first filter 40 is connected to the fuel cell module 10 through an intake valve 50.

[0039] As a preferred embodiment, the air compressor 20 is connected to the hydrogen storage device 31 through the first filter 40.

[0040] As a preferred embodiment, the fuel cell module 10 is connected to the air compressor 20 through an exhaust valve 60.

[0041] As a preferred embodiment, the air compressor 20 is connected to an air supply system 80 through a second filter 70.

[0042] As a preferred embodiment, the air compressor 20 is connected to the air inlet of the fuel cell module 10.

[0043] As a preferred embodiment, the bidirectional gas compressor system for a fuel cell further includes a thermal management module 90, and the thermal management module 90 is connected to the fuel cell module 10.

[0044] Through the present application, it is possible to solve the problem that in the existing integrated regenerative fuel cell system, the air compressor is a device for supplying air to the fuel cell stack module, and the diaphragm pump is a device for compressing and transporting the hydrogen produced by the electrolytic water hydrogen production module. The two are separate devices, and the structure is relatively complex, and the functions of the two cannot be achieved by one device. The present application can achieve the functions of the air compressor of the existing air supply system and the diaphragm pump of the existing electrolytic water hydrogen production module, simplifies the components, improves the efficiency, saves costs, has a high production efficiency, and is easy to batch or mass produce.

[0045] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A bidirectional gas compressor system for a fuel cell, characterized in that, it includes a fuel cell module, a gas compressor, and a water electrolysis hydrogen production module, and the gas compressor is respectively connected to the fuel cell module and the water electrolysis hydrogen production module; a coaxial gear is arranged in the gas compressor, and the coaxial gear at least includes a first coaxial gear and a second coaxial gear arranged adjacent to each other; the first coaxial gear is respectively connected to the fuel cell module and the water electrolysis hydrogen production module; the second coaxial gear is respectively connected to the fuel cell module and the water electrolysis hydrogen production module; a first large gear and a first small gear are arranged on the first coaxial gear, and a second large gear and a second small gear are arranged on the second coaxial gear; the distance between the first large gear and the first small gear is less than the distance between the second large gear and the second small gear; when the gas compressor provides air for the fuel cell module, the gas compressor is in a low output mode, and the first large gear is meshed and connected with the second large gear; when the gas compressor transports the hydrogen of the water electrolysis hydrogen production module to the fuel cell module, the gas compressor is in a high output mode, and the first large gear is meshed and connected with the second small gear; or, the first small gear is meshed and connected with the second large gear; or, the first small gear is meshed and connected with the second small gear.

2. The bidirectional gas compressor system for a fuel cell according to claim 1, characterized in that, the first large gear is arranged close to the second small gear, and the first small gear is arranged close to the second large gear.

3. The bidirectional gas compressor system for a fuel cell according to claim 2, characterized in that, the diameter of the first large gear is greater than the diameter of the first small gear; the diameter of the second large gear is greater than the diameter of the second small gear.

4. The bidirectional gas compressor system for a fuel cell according to claim 1, characterized in that, a hydrogen storage device is arranged in the water electrolysis hydrogen production module, the hydrogen storage device is connected to a first filter, and the first filter is connected to the fuel cell module through an intake valve.

5. The bidirectional gas compressor system for a fuel cell according to claim 4, characterized in that, the gas compressor is connected to the hydrogen storage device through the first filter; the fuel cell module is connected to the gas compressor through an exhaust valve.

6. The bidirectional gas compressor system for a fuel cell according to claim 5, characterized in that, the gas compressor is connected to an air supply system through a second filter.

7. The bidirectional gas compressor system for a fuel cell according to claim 6, characterized in that, the gas compressor is connected to the air inlet of the fuel cell module.

8. The bidirectional gas compressor system for a fuel cell according to claim 1, characterized in that, the bidirectional gas compressor system for a fuel cell further includes a thermal management module, and the thermal management module is connected to the fuel cell module.

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