CN216563227U

CN216563227U - Fuel cell air system and fuel cell power system

Info

Publication number: CN216563227U
Application number: CN202122942118.4U
Authority: CN
Inventors: 韩吉伟; 范开学; 徐佳
Original assignee: Weishi Energy Technology Co Ltd
Current assignee: Weishi Energy Technology Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-05-17
Anticipated expiration: 2031-11-26

Abstract

The utility model belongs to the technical field of fuel cells, and discloses a fuel cell air system and a fuel cell power system, wherein the fuel cell air system comprises an air compressor, an intercooler, a humidifier and a fuel cell stack which are sequentially communicated, the intercooler comprises a first heat exchange channel and a second heat exchange channel, the humidifier comprises a first inlet, a first outlet, a second inlet and a second outlet, the first heat exchange channel is communicated with the air compressor and the first inlet, the first outlet is communicated with the inlet of the fuel cell stack, the second inlet is communicated with the outlet of the fuel cell stack, the second outlet is communicated with the second heat exchange channel, the second heat exchange channel is communicated with an expander, and the expander is connected to the air compressor. The utility model can improve the energy utilization rate and reduce the heat dissipation burden of the system.

Description

Fuel cell air system and fuel cell power system

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a fuel cell air system and a fuel cell power system.

Background

The fuel cell includes a hydrogen module including a high pressure hydrogen supply module and a low pressure hydrogen control module, an air module, and a cooling module. The air module contains empty straining, the air compressor machine, the expander, the intercooler, humidifier and back pressure valve, regulate and control the air that provides the demand for the pile cathode through air compressor machine and back pressure valve, the intercooler is a structure original paper of the cooling of high-temperature gas after for air compressor machine pressurization, arrange in the air compressor machine rear end, the effect mainly reduces air temperature, prevent that high-temperature gas from entering into and destroying the pile in the pile, need to let in the coolant liquid in the intercooler and cool off its compressed air, and adopt the mode of coolant liquid cooling compressed air, can increase vehicle radiating module's heat transfer burden, and the energy runs off along with the coolant liquid, cause the waste of energy, lead to entire system efficiency to reduce.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a fuel cell air system and a fuel cell power system, which can improve the energy utilization rate and reduce the heat radiation burden of a vehicle heat radiation module.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a fuel cell air system, is including the air compressor machine, intercooler, humidifier and the fuel cell pile that communicate in proper order, wherein the intercooler includes first heat transfer passageway and second heat transfer passageway, the humidifier includes first import, first export, second import and second export, first heat transfer passageway communicate in the air compressor machine with first import, first export intercommunication the import of fuel cell pile, second import intercommunication the export of fuel cell pile, second export intercommunication second heat transfer passageway, second heat transfer passageway intercommunication has the expander, the expander connect in the air compressor machine.

Preferably, the air compressor further comprises an air filter, and the air filter is communicated with an inlet of the air compressor.

Preferably, the air compressor includes a plurality of connected compressors, wherein the compressor at the end is connected to the expander, the compressor at the end is communicated with the first heat exchange channel, and the compressor at the head end is connected to the air cleaner.

Preferably, the air compressor comprises a first-stage compressor and a second-stage compressor, the first-stage compressor is communicated with the air filter, the second-stage compressor is connected to the expander, and the second-stage compressor is communicated with the first heat exchange channel.

Preferably, the humidifier comprises a housing and a hollow fiber membrane, wherein a chamber is arranged inside the housing, the hollow fiber membrane is arranged in the chamber, the first inlet and the first outlet are arranged on the housing and communicated with two ends of the hollow fiber membrane, and the second inlet and the second outlet are arranged on the housing and communicated with the chamber.

Preferably, the outlet of the expander is connected to the outside via an exhaust pipe.

Preferably, an exhaust valve is arranged on the exhaust pipe.

Preferably, the air cleaner is communicated with an air inlet pipeline.

Preferably, an intake valve is provided on the intake duct.

The utility model also provides a fuel cell power system which comprises the fuel cell air system.

The utility model has the beneficial effects that: the second outlet is formed in the humidifier, the second outlet is communicated with the second heat exchange channel of the intercooler, so that wet air discharged from the outlet of the fuel cell stack enters the second heat exchange channel after passing through the humidifier to cool high-temperature compressed air entering the intercooler, then the high-temperature compressed air enters the expander to do work to recover energy, cooling of the compressed air by using cooling liquid is not needed, the energy utilization rate is improved, and the heat exchange burden of the vehicle heat dissipation module can be reduced.

Drawings

Fig. 1 is a schematic diagram of the structural principle of the air system of the fuel cell provided by the utility model.

In the figure:

11. a first stage compressor; 12. a secondary compressor; 2. an intercooler; 3. a humidifier; 31. a first inlet; 32. a first outlet; 33. a second inlet; 34. a second outlet; 4. a fuel cell stack; 5. an expander; 6. an air cleaner.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides a fuel cell air system, which comprises an air compressor, an intercooler 2, a humidifier 3, a fuel cell stack 4 and an expander 5, wherein the air compressor, the intercooler 2, the humidifier 3 and the fuel cell stack 4 are sequentially communicated, the intercooler 2 comprises a first heat exchange channel and a second heat exchange channel, the humidifier 3 comprises a first inlet 31, a first outlet 32, a second inlet 33 and a second outlet 34, the first heat exchange channel is communicated with the air compressor and the first inlet 31, the first outlet 32 is communicated with the inlet of the fuel cell stack 4, the second inlet 33 is communicated with the outlet of the fuel cell stack 4, the second outlet 34 is communicated with the second heat exchange channel, the second heat exchange channel is communicated with the expander 5, and the expander 5 is connected with the air compressor. Outside air produces high temperature compressed air through the compression of air compressor machine, high temperature compressed air gets into intercooler 2 and cools down afterwards, compressed air after the cooling gets into humidifier 3 and is humidified, later get into fuel cell galvanic pile 4 and participate in the reaction, later flow into humidifier 3 through the export of fuel cell galvanic pile 4, and carry out the humidification to the compressed air who flows in from intercooler 2, gas (tail row air is called as in this embodiment) that has certain humidity later gets into intercooler 2 through second heat transfer passageway, and carry out the heat exchange with the high temperature compressed air of air compressor machine in intercooler 2, with the temperature that reduces compressed air, tail row air after the heat transfer afterwards gets into expander 5, expander 5 recovered energy does work and is applyed in the air compressor machine, tail row air is discharged to the external world afterwards.

In this embodiment, it is preferable that the outlet of the expander 5 is communicated with an exhaust pipe, the exhaust pipe is communicated with the outside, and the exhaust gas is exhausted through the exhaust pipe after the expander 5 applies work. An exhaust valve is arranged on the exhaust pipe to control the on-off of the exhaust pipe.

This embodiment gets into second heat transfer passageway through 4 export exhaust humid air of fuel cell galvanic pile behind humidifier 3, comes to cool down the high temperature compressed air who gets into intercooler 2, gets into 5 power consumptions of expander afterwards and recovers the energy, need not to use the coolant liquid to cool down compressed air, has improved energy utilization, also can reduce vehicle heat module's heat transfer burden moreover.

In this embodiment, above-mentioned fuel cell air system still includes air cleaner 6, and this air cleaner 6 communicates in the import of air compressor machine, and the outside air gets into the air compressor machine after 6 filtration of air cleaner, can reduce the damage to the air compressor machine. Preferably, the air filter 6 is communicated with an air inlet pipeline, external air enters the air filter 6 through the air inlet pipeline, and an air inlet valve is arranged on the air inlet pipeline so as to control the on-off of the air inlet pipeline. Furthermore, the present embodiment may also be configured such that the intake valve is provided as a valve body that can adjust the flow rate to control the air as needed to set the flow rate into the air cleaner 6.

In this embodiment, the air compressor includes a plurality of connected compressors, wherein the compressor at the end is connected to the expander 5, and the expander 5 can apply work to the compressor at the end. The compressor at the tail end is also communicated with the first heat exchange channel, and compressed air exhausted by the compressor at the tail end enters the first heat exchange channel and then exchanges heat with tail exhaust air in the second heat exchange channel to be cooled. The compressor at the head end is connected to an air cleaner 6. The multi-stage compressor is matched with the expander 5 simultaneously, so that the performance MAP (wider MAP range and pressure ratio) of the air compressor can be widened, the problem that the flow and pressure ratio of the single-stage air compressor and the expander cannot meet the requirement of high power density of the fuel cell stack 4 can be solved, the power and the operating temperature of the fuel cell stack 4 can be improved, and the efficiency of a fuel cell system can be improved. And through multistage compressor, can make flow and the pressure control range of the compressed air who gets into intercooler 2 wider, higher power's fuel cell can be matchd to wider flow and pressure, and higher pressure can make fuel cell pile 4 operation at higher temperature for the system heat dissipation has bigger difference in temperature, and the heat dissipation is changeed, reduces the heat dissipation consumption.

As shown in fig. 1, the air compressor of the present embodiment includes a primary compressor 11 and a secondary compressor 12, wherein the primary compressor 11 is communicated with the air cleaner 6, the secondary compressor 12 is connected to the expander 5, and the secondary compressor 12 is communicated with the first heat exchange channel. Outside air enters the first-stage compressor 11 after being filtered by the air filter 6, then air compressed by the first-stage compressor 11 enters the second-stage compressor 12 for secondary compression, and then high-temperature compressed air discharged by the second-stage compressor 12 enters the first heat exchange channel of the intercooler 2 and is cooled by tail discharge air in the second heat exchange channel.

In this embodiment, the humidifier 3 includes a housing and a hollow fiber membrane, a chamber is disposed inside the housing, the hollow fiber membrane is disposed in the chamber, the first inlet 31 and the first outlet 32 are disposed on the housing and are communicated with two ends of the hollow fiber membrane, and the second inlet 33 and the second outlet 34 are disposed on the housing and are communicated with the chamber. The compressed air cooled by the intercooler 2 enters the hollow fiber membrane and is humidified by the humid air flowing out from the outlet of the fuel cell stack 4, and then the humidified compressed air enters the fuel cell stack 4 to participate in the reaction, and forms a chamber where the humid air enters the humidifier 3 to participate in the humidification of the compressed air in the hollow fiber membrane again. Meanwhile, the humidified tail exhaust air flows into the second heat exchange channel of the intercooler 2 through the second outlet 34, and participates in heat exchange with the high-temperature compressed air in the first heat exchange channel.

The utility model also provides a fuel cell power system which comprises the fuel cell air system and can effectively improve the energy utilization rate and reduce the heat radiation burden of the vehicle heat radiation module.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A fuel cell air system is characterized by comprising an air compressor, an intercooler (2), a humidifier (3) and a fuel cell stack (4) which are communicated in sequence, wherein the intercooler (2) comprises a first heat exchange channel and a second heat exchange channel, the humidifier (3) comprises a first inlet (31), a first outlet (32), a second inlet (33) and a second outlet (34), the first heat exchange channel is communicated with the air compressor and the first inlet (31), the first outlet (32) is communicated with the inlet of the fuel cell stack (4), the second inlet (33) is communicated with the outlet of the fuel cell stack (4), the second outlet (34) is communicated with the second heat exchange channel, the second heat exchange channel is communicated with an expander (5), and the expander (5) is connected to the air compressor.

2. The fuel cell air system according to claim 1, further comprising an air cleaner (6), wherein the air cleaner (6) is communicated with an inlet of the air compressor.

3. A fuel cell air system according to claim 2, wherein the air compressor comprises a plurality of connected compressors, wherein the compressor at the end is connected to the expander (5), and the compressor at the end is connected to the first heat exchange passage, and the compressor at the head end is connected to the air cleaner (6).

4. The fuel cell air system according to claim 3, wherein the air compressor includes a primary compressor (11) and a secondary compressor (12), the primary compressor (11) communicates with the air cleaner (6), the secondary compressor (12) is connected to the expander (5), and the secondary compressor (12) communicates with the first heat exchange passage.

5. The fuel cell air system according to any one of claims 1 to 4, wherein the humidifier (3) includes a housing and a hollow fiber membrane, a chamber is provided inside the housing, the hollow fiber membrane is provided in the chamber, the first inlet (31) and the first outlet (32) are provided on the housing and communicate with both ends of the hollow fiber membrane, and the second inlet (33) and the second outlet (34) are provided on the housing and communicate with the chamber.

6. A fuel cell air system according to any of claims 1-4, characterized in that the outlet of the expander (5) is connected to the outside via an exhaust pipe.

7. The fuel cell air system according to claim 6, wherein an exhaust valve is provided on the exhaust pipe.

8. A fuel cell air system according to any of claims 2 to 4, characterized in that the air filter (6) is connected to an intake duct.

9. The fuel cell air system according to claim 8, wherein an intake valve is provided on the intake duct.

10. A fuel cell power system comprising a fuel cell air system according to any one of claims 1 to 9.